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15 September 2021, Volume 46 Issue 17 Previous Issue    Next Issue
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New Energy Vehicle
Intelligent Connected Vehicle
Testing and Experiment
Design and Research
Process and Equipment
Use and Maintenance
Automobile Education
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New Energy Vehicle

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Analysis of Key Performance Parameters of Pure Electric Vehicles Based on ADVISOR SHANG Yuxi 2021, 46(17): 1-3.  DOI: 10.16638/j.cnki.1671-7988.2021.017.001 Abstract ( )   PDF (488KB) ( )   In order to determine the performance of a pure electric vehicle, the performance of the vehicle is shown with as few parameters as possible. Determine the basic model and key performance parameters of pure electric vehicles. Through ADVISOR (advanced vehicle simulator) software simulation, through simulation, the influence of the parameters of different automobile components on the performance of the pure electric vehicle is obtained, and then which parameters are the key parameters. References | Related Articles | Metrics

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Research on Control Strategy of Yaw Stability of Distributed Driving Electric Vehicle WANG Dong 2021, 46(17): 4-7.  DOI: 10.16638/j.cnki.1671-7988.2021.017.002 Abstract ( )   PDF (909KB) ( )   In the vehicle control of distributed electric vehicles, yaw stability control is an extremely important technology. In this paper, a two-layer control structure for yaw stability is designed. The upper layer sets up the target state based on the vehicle's linear two-degree-of-freedom model and the vehicle state parameters. The additional yaw moment required to maintain the stability of the vehicle is determined based on the fuzzy control rules. The lower layer is based on the upper yaw torque controls the torque distribution of different wheels. Through Carsim/Simulink co-simulation, a simulation model of rear-wheel drive vehicle and vehicle control strategy is constructed. The simulation results show that the yaw stability control strategy based on fuzzy control can effectively improve the handling stability of the vehicle and improve the safety of the vehicle. References | Related Articles | Metrics

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Study on Loss Voltage Threshold of On-board Battery ZHANG Qing 2021, 46(17): 8-10.  DOI: 10.16638/j.cnki.1671-7988.2021.017.003 Abstract ( )   PDF (1302KB) ( )   Vehicle power mode switch to ACC/ON, using on-board electrical appliances in ACC/ON for a long period of time, will cause battery power-lack or even loss of power, the vehicle might can't be started when it is used again. The article mainly studies how to accurately calibrate the voltage threshold of the power loss, and how to effectively prevent the power loss through the control strategy. References | Related Articles | Metrics

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Research on Hardware-in-Loop Test Method of Electric Vehicle E-Booster HUANG Li 2021, 46(17): 11-13.  DOI: 10.16638/j.cnki.1671-7988.2021.017.004 Abstract ( )   PDF (748KB) ( )   E-Booster is an important component to improve the energy recovery and braking stability of electric vehicles. There are many interactive components and high requirements for operation precision and accuracy. Therefore, it is necessary to fully test E-Booster. In this paper, a method of using hardware-in-the-loop (HIL) simulation test to test the wire control system is proposed, which can realize the full range of automatic test of the wire control system by building a simulation test environment without real vehicle or actual sample. References | Related Articles | Metrics

Intelligent Connected Vehicle

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Study on Path Planning and Path Tracking of Driverless Vehicle LI Zetian 2021, 46(17): 14-17.  DOI: 10.16638/j.cnki.1671-7988.2021.017.005 Abstract ( )   PDF (993KB) ( )   Based on vehicle dynamics model and tire model, this paper adopts model predictive control to design prediction model. In order to improve the real-time performance and accuracy of tracking, the variable of front wheel side Angle is introduced, so that the unmanned vehicle can accurately track the target path under the condition of low adhesion coefficient and the condition of highway.In this paper, combined with Carsim and Simulink co-simulation, a conclusion can be drawn through the simulation experiment: after considering the constraint of front wheel sideslip Angle in the model, compared with the traditional MPC path tracking model, the path tracking effect and driving stability of the unmanned vehicle under extreme working conditions are enhanced. References | Related Articles | Metrics

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Lane Line Image Recognition Based on OpenCV Vision Library ZHOU Qifeng 2021, 46(17): 18-21.  DOI: 10.16638/j.cnki.1671-7988.2021.017.006 Abstract ( )   PDF (1376KB) ( )   With the release of Smart NetworkIng Automotive Technology Roadmap 2.0, it is imperative for the country to vigorously develop intelligent networked vehicles. This paper uses the OpenCV computer vision library in python to complete the recognition of lane line images through a series of operations such as image smoothing and Hof transformation, and finally draws an image that perfectly fits the lane line. This paper has high utilization value for the development of camera-based intelligent cars. References | Related Articles | Metrics

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Research on the Deceleration Timing Strategy of the Traffic Jam Assist System under Cut in Condition Based on 5R1V ZHENG Wangxiao 2021, 46(17): 22-25.  DOI: 10.16638/j.cnki.1671-7988.2021.017.007 Abstract ( )   PDF (704KB) ( )   At present, the development of intelligent driving assistance systems is growing rapidly, and the proportion of mass-produced vehicles on the market equipped with ADAS (Advanced Driving Assistant System) systems is also increasing. In urban conditions, the traffic is more complicated. Compared with the traditional adaptive cruise system ACC, the traffic jam assist system has more advantages, but the configuration of one forward millimeter wave radar and a camera still has certain limitations. The configuration of five millimeter wave radars and a camera (5R1V) has been developed and applied in mass production vehicles. Based on the 5R1V traffic jam assistance system, this paper does related research on the combining track of social vehicles under urban conditions. On the actual road, the actual vehicle is used to test the cut in conditions, and combined with the subjective evaluation of the driver, the expected deceleration and safety distance are obtained. Analyze the radar coverage of 5R1V and establish the vehicle cut-in and deceleration model. The braking timing of the combining track is calculated through the model, which provides a reference for the vehicle deceleration strategy of the TJA system. References | Related Articles | Metrics

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Research on Current Status of Commercial Vehicle Autonomous Driving Test XU She 2021, 46(17): 26-29.  DOI: 10.16638/j.cnki.1671-7988.2021.017.008 Abstract ( )   PDF (1174KB) ( )   This paper introduces the automatic driving test of commercial vehicle in detail. Firstly, the definition of intelligent connected vehicle and the market status of commercial vehicles are introduced. This paper introduces the situation of automatic driving test from the aspects of simulation test, road test and construction of test ground. From the perspective of scenarios, this paper introduces the landing scenarios which are easier to realize and have more potential in the field of commercial vehicles. Next, it introduces the regulations and policies in the field of automatic driving of commercial vehicles. Based on the above, this paper analyzes the landing of commercial vehicle intelligent networking industry. References | Related Articles | Metrics

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A Driver Model Based on Fuzzy Logic Intelligent Control YANG Hao 2021, 46(17): 30-33.  DOI: 10.16638/j.cnki.1671-7988.2021.017.009 Abstract ( )   PDF (1179KB) ( )   Fuzzy logic intelligent control is widely used in the control field because it does not require precise mathematical models and can be better applied to nonlinear systems. The driver model mainly analyzes the effect of vehicle path tracking. In order to improve the accuracy and adaptability of vehicle path tracking, a human-vehicle-road closed-loop system needs to be established. Because the vehicle model is highly non-linear, it cannot be established with precise mathematical expressions. At the same time, because the driver has lag factors in response and operation, it is difficult to establish a human-vehicle-road closed-loop system model with an accurate mathematical model. The driver model's decision-making on the steering wheel is mainly processed and analyzed by introducing control theory. Therefore, this paper applies fuzzy logic intelligent control to the input control of the steering wheel angle. Through fuzzy logic intelligent control, a two-dimensional input variable of lateral error and vehicle speed is established, and a steering wheel angle is a one-dimensional output variable control model. The steering wheel angle of the vehicle is determined by four steps: fuzzification, membership function selection, fuzzy rule formulation, and defuzzification to determine the optimal steering wheel angle. Avoid the dependence on the mathematical expression of the vehicle model. Through simulation verification, the established driver model can be better adapted to the nonlinear system and can effectively improve the accuracy of vehicle path tracking. References | Related Articles | Metrics

Testing and Experiment

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Modeling and Simulation of Constant Variable Pressure Piston Pump Based on Amesim JIA Ning 2021, 46(17): 34-37.  DOI: 10.16638/j.cnki.1671-7988.2021.017.010 Abstract ( )   PDF (1818KB) ( )   In order to analyze the static and dynamic characteristics of the plunger pump, a mathematical model of the axial plunger pump is established by using fluid mechanics. Through the AMESim platform, create a A simulation model, which includes the spindle, valve plate, cylinder, plunger, sliding shoe, swash plate parameters, etc. of the plunger pump, and establishes a motor based on the overall flow PID control, the static and dynamic characteristics of the plunger pump are simulated, and the characteristics of flow pulsation and plunger movement speed fluctuation are obtained. The results show that the established plunger pump The simulation model is consistent with the mathematical model. The flow-based PID control strategy can achieve a stable output of the total flow of the plunger pump, which is the design and Research provides further theoretical basis. References | Related Articles | Metrics

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Research on Speed Fluctuation of Direct Injection Engine ZHANG Shaohua 2021, 46(17): 38-41.  DOI: 10.16638/j.cnki.1671-7988.2021.017.011 Abstract ( )   PDF (1037KB) ( )   With the tightening of national emission and fuel consumption regulations and consumers' demand for vehicle power and comfort are increasing, the application of turbocharged direct injection technology in engines is more common. This paper mainly introduces the phenomenon and mechanism of engine idle speed fluctuation, the factors leading to speed fluctuation and the troubleshooting scheme. It focuses on the analysis of the phenomenon of speed fluctuation caused by fuel injector, and analyzes the characteristics of fuel injector.The self-learning function of injector CVO are described in detail, which can be used to guide after-sales analysis of speed fluctuation. Related Articles | Metrics

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Evaluation and Analysis of Uncertainty in Measurement of Friction Coefficient of Single Synchronizer Test Bench FENG Dianjun 2021, 46(17): 42-46.  DOI: 10.16638/j.cnki.1671-7988.2021.017.012 Abstract ( )   PDF (1080KB) ( )   The synchronous capacity of the synchronizer is one of the important indicators to measure the working ability of the synchronizer, and the synchronous design calculation parameters affecting the synchronous capacity mainly have friction cone ring radius, cone angle, friction coefficient, so the accuracy of the coefficient of friction will directly affect the synchronization device design calculation and verification. In this paper, the method and step of measuring uncertainty of the coefficient of friction of the single-body synchronizer test bench were established by the GUM method, and then the uncertainty of the coefficient of friction was analyzed with the 20322 cone ring as an example, and the maximum coefficient of friction uncertainty was reported μmax=(0.112±0.002), k=2, including probability p≈95%. The results are analyzed, and the results show that the uncertainty component of the cone angle is the key factor that affects the accuracy of measuring the maximum coefficient of friction. References | Related Articles | Metrics

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Investigation and Improvement of Abnormal Acceleration Noise of a Passenger Vehicle XING Weizhe 2021, 46(17): 47-50.  DOI: 10.16638/j.cnki.1671-7988.2021.017.013 Abstract ( )   PDF (7891KB) ( )   Taking the abnormal acceleration noise of a passenger vehicle as an example, the problem is checked and improved by means of test. First of all, the phenomenon of the problem point and the occurrence condition were evaluated subjectively and tested objectively, and 350 Hz～450 Hz was identified as abnormal sound frequency band. Secondly,testing the vibration on the powertrain and dismantling the parts, the correlation between the acceleration abnormal noise and the torsional vibration of the crankshaft is confirmed. Finally, by testing the torsional vibration of the crankshaft on the vehicle and improving the working frequency of the torsional vibration damper, the amplitude of the torsional vibration of the crankshaft is reduced and the abnormal acceleration noise is eliminated. References | Related Articles | Metrics

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Cause Analysis and Solution of Gear Milling of a Diesel Engine Starter WANG Baodong 2021, 46(17): 51-53.  DOI: 10.16638/j.cnki.1671-7988.2021.017.014 Abstract ( )   PDF (1515KB) ( )   When the starter is designed to match, several parameters should be considered. If the relevant parameters are not matched properly, different faults will occur. This paper presents the theoretical analysis, solutions and tests to verify the gear milling fault caused by the improper connection distance between the starter top gear and the distance between the mounting surface and the ring gear. The conclusion is effective. Through the reverse derivation and analysis of this paper, the paper provides a positive reference for the design and matching development of starter and diesel engine. Keywords: Diesel engine; Starter; The improper connection distance between the starter top gear and the ring gear; Gear milling References | Related Articles | Metrics

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Research on Emission Characteristics of Heavy Diesel Vehicles during Cold-start Based on PEMS Test ZHANG Jinjie 2021, 46(17): 54-58.  DOI: 10.16638/j.cnki.1671-7988.2021.017.015 Abstract ( )   PDF (2451KB) ( )   In order to analyze the emission characteristics of various pollutants under the condition of cold-start of heavy-duty diesel vehicles, 5 heavy-duty diesel vehicles were selected for actual road vehicle testing. The test results show that, NOX accounts for a relatively large share in the cold start phase, while CO and PN account for a relatively small share in the cold-start phase, from the perspective of cumulative emissions. The specific emissions of NOX and CO during the cold start phase are relatively large, from the perspective of specific emissions. However, the specific emission of PN during the cold start phase was not always the larger one. Comparing the changes in the concentration of various pollutants before and after the cold start, it is found that NOX has a clear downward trend before and after the cold start, while the change trend of PN and CO is not obvious, indicating that the situation of the vehicle itself play a role in the emission of the PN and CO. It should be paid more attention to the NOX and CO emissions of vehicles during the cold start phase in the future. References | Related Articles | Metrics

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Study on Test Conditions of Refueling Performance of Passenger Cars CAO Weiwei 2021, 46(17): 59-61.  DOI: 10.16638/j.cnki.1671-7988.2021.017.016 Abstract ( )   PDF (1259KB) ( )   This paper briefly describes the structure, principle of refueling, performance requirements and test methods of refueling pipes. Taking a passenger car as an example, the effects of gasoline temperature, ambient temperature and RVP value on the performance of fuel are studied by means of experiments. References | Related Articles | Metrics

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Stabilizer Bar Link Swing Angle of the Ball Pin Calculation Based on Adams FAN Hongchun 2021, 46(17): 62-64.  DOI: 10.16638/j.cnki.1671-7988.2021.017.017 Abstract ( )   PDF (1207KB) ( )   When Adams is used to solve the swing angle of the ball pin of the stabilizer bar of McPherson type front suspension, ball joints modeling for both upper and lower stabilizer bar link end cannot meet the requirements of degrees of freedom. Conventional modeling replaces one of the ball joints with a hooke or a constant velocity pair. But they cannot be deflected around the axis of the stabilizer bar link. The movement of which is seriously inconsistent with the actual situation. Therefore, this modeling method cannot guide the design of swing angle of the ball pin. The bushing has six degrees of freedom and can be equivalent to the properties of the ball joint by setting the stiffness in each direction. Hence, this paper proposes a modeling method of using bushing instead of ball joint at both stabilizer bar link ends. At the same time, the contact conditions of the ball pin and cup are established to validate the situation that the ball pin is limited after being placed at the maximum angle in the actual use. References | Related Articles | Metrics

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Analysis and Improvement of Engine Water System Test Method YUAN Bin 2021, 46(17): 65-67.  DOI: 10.16638/j.cnki.1671-7988.2021.017.018 Abstract ( )   PDF (954KB) ( )   In the engine test and development stage, the pressure drop of the vehicle water tank was simulated through the test waterway to fully evaluate the performance and reliability of the engine cooling system. The test method of waterway bypass is to ensure pump flow through waterway diversion and to ensure stable control of water temperature through mixing water. The waterway bypass test method can flexibly simulate the pressure drop condition of various vehicle water tank according to the test requirements, restore the pressure drop and flow requirements of the engine cooling water tank to the maximum extent, and fully examine the engine cooling system. Through practice, the water temperature control of the engine is stable and the circulating water flow in the engine is sufficient to meet the requirements of various tests References | Related Articles | Metrics

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The Introduction to the Air Conditioning System Test Bench in the Role of Forward Design CHEN Guangwu 2021, 46(17): 68-70.  DOI: 10.16638/j.cnki.1671-7988.2021.017.019 Abstract ( )   PDF (990KB) ( )   In the design process of air conditioning system, all kinds of service conditions and system parameters need to be considered comprehensively. If all kinds of parameters are combined and verified on the whole vehicle one by one, the design cost of the product will be greatly increased. This paper introduces a comprehensive test bench for air conditioning system in development stage, which can get the most suitable system matching scheme by setting its boundary conditions. The bench test has high efficiency and strong contrast, and the test data can form a curve for intuitive comparison, which can solve the problem that there is no one-dimensional simulation analysis, performance test and system matching before the vehicle air conditioning scheme is frozen. References | Related Articles | Metrics

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Influence of Air Filter Outlet Fillet Size on Flow Resistance Based on Simulation MA Jingjing 2021, 46(17): 71-73.  DOI: 10.16638/j.cnki.1671-7988.2021.017.020 Abstract ( )   PDF (1444KB) ( )   The flow resistance analysis method of air filter based on simulation is to use computer-aided software to calculate and process the three-dimensional digital model of air filter, and modify the empirical parameters to analyze the air distribution and flow resistance value with reference significance. The method of simulation analysis saves the production cost and cycle of the actual physical sample, which has important guiding significance for the verification and optimization of multiple demonstration schemes. Based on the characteristics of simulation analysis, the air filter models with different outlet fillet sizes are calculated and analyzed. According to the comparison of the results, the change trend of air filter flow resistance with outlet fillet size is obtained, which is convenient to guide the optimization of air filter scheme. References | Related Articles | Metrics

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Research on Three Cylinder Engine and NVH YANG Yuanyuan 2021, 46(17): 74-76.  DOI: 10.16638/j.cnki.1671-7988.2021.017.021 Abstract ( )   PDF (1590KB) ( )   In recent years, the three-cylinder engine has been widely used in various brands of cars in the market. The three-cylinder engine brings many advantages to the vehicle, but also brings some negative effects. This paper mainly discusses the relationship between the three-cylinder engine and NVH, the impact of the structure characteristics of the three-cylinder engine and its balance on NVH, and gives effective solutions to the jitter problem of the three-cylinder engine by analyzing specific cases. Related Articles | Metrics

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Research on Unqualified Braking Performance of a Commercial Vehicle DUAN Min 2021, 46(17): 77-79.  DOI: 10.16638/j.cnki.1671-7988.2021.017.022 Abstract ( )   PDF (1475KB) ( )   Vehicle braking performance is the guarantee of vehicle safety. China is also a mountainous country. Many roads built on mountains have large slopes and long slopes. Due to the heavy loading quality of commercial vehicles, when braking downhill in such a bad condition, the temperature rises quickly when braking continuously, which is easy to cause traffic accidents. Therefore, in the development process of braking system, the matching of braking response speed and braking force is particularly important. In this paper, through the treatment of a commercial vehicle braking unqualified problem, the direction of the impact of commercial vehicle braking performance is studied. References | Related Articles | Metrics

Design and Research

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Analysis of Tensioner’s Malfunction and Optimization on Engine Front End Accessory Drive System ZENG Chao 2021, 46(17): 80-83.  DOI: 10.16638/j.cnki.1671-7988.2021.017.023 Abstract ( )   PDF (2386KB) ( )   Aiming at the high failure rate of the automatic tensioner in the air-conditioner-generator gear train of an engine, it is found that the high failure rate of the tensioner is caused by the excessive swing angle of the tensioner arm by comparing it with the fan-pump gear train. Through optimization, the air-conditioner and generator gear train was changed from crankshaft drive to fan carrier drive. After calculation, the swing angle of the tensioning arm of the air-conditioner and generator gear train was reduced to less than 0.5 °, and the validity of the scheme was verified by market verification. References | Related Articles | Metrics

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The Research and Application of Wire Harness Interconnection MENG Lin 2021, 46(17): 84-87.  DOI: 10.16638/j.cnki.1671-7988.2021.017.024 Abstract ( )   PDF (1586KB) ( )   There are many electrical equipment in the whole vehicle, and each electrical equipment needs a power supply or negative pole (generally referred to as the vehicle grounding). At this time, the wiring harness internal wires need to be designed in-line. In this paper, the in-line technology of automobile wiring harness is studied in detail. By using in-line design in automobile plug-in, the traditional in-line technology is replaced, and the reliability, safety, versatility and maintenance convenience of automobile wiring harness are improved. References | Related Articles | Metrics

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Light Weight Research on Composite Leaf Spring of a New Commercial Vehicle DENG Bin 2021, 46(17): 88-90.  DOI: 10.16638/j.cnki.1671-7988.2021.017.025 Abstract ( )   PDF (2488KB) ( )   Based on engineering material science and automobile design theory, this paper uses ABAQUS software to optimize the structure of a commercial light truck glass fiber leaf spring scheme. At the same time, the acceleration data of Xiangyang test site are collected, and the strength analysis of the lightweight scheme of glass fiber leaf spring is carried out. The results show that the maximum tensile stress and compressive stress of glass fiber leaf spring meet the material limit strength The comprehensive weight reduction is up to 35 kg, and the lightweight effect is remarkable. References | Related Articles | Metrics

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Design of Vehicle-based Control System of Truck-overload PENG Pengfeng 2021, 46(17): 91-93.  DOI: 10.16638/j.cnki.1671-7988.2021.017.026 Abstract ( )   PDF (1561KB) ( )   In order to prevent truck overload in the source, a vehicle-based control system of truck-overload is designed. The system takes STM32F103C8T6 single chip as the core, calculates and displays the truck load information in real time according to the displacement sensor signals installed at both ends of the vehicle bridge. When the overload is detected, the voice alarm module is triggered to prompt the driver for overload, and cut off the ignition circuit of the engine to make the vehicle stop automatically, so that the overloaded vehicle can not be on the road. This paper mainly introduces the overall design scheme of the system, analyzes the principle of on-board weighing and overload control strategy, and designs the hardware circuits such as power circuit, weighing module and overload control module. References | Related Articles | Metrics

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Study on Parking Mechanism Principle Structure and Performance Analysis of Automatic Transmission KONG Tianzeng 2021, 46(17): 94-97.  DOI: 10.16638/j.cnki.1671-7988.2021.017.027 Abstract ( )   PDF (2236KB) ( )   P gear is the most common kind of gear in the car, P block parking lock mechanism is a core device of automatic transmission, assembled in the automatic transmission power output shaft, through the movement of the locking mechanism, cut off the output shaft power, so that the car on the ramp safe, reliable, long time stop, prevent the car slip slope. This paper takes a car with engine front and rear as an example, and introduces the structure principle, functional requirements, working state and mechanical properties of the locking mechanism of parking P block, so as to provide a reference for the design and development of parking mechanism. References | Related Articles | Metrics

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Thoughts and Practice on Optimizing the Transmission Efficiency of Heavy Commercial Vehicle Drive Axle YANG Sheng 2021, 46(17): 98-100.  DOI: 10.16638/j.cnki.1671-7988.2021.017.028 Abstract ( )   PDF (1994KB) ( )   Energy saving and emission reduction is the inevitable choice for the sustainable development of the automobile industry. The fuel consumption of automobile is closely related to the efficiency of transmission system, the drive axle plays an important role in the transmission system of automobile. The article summarizes the drive axle transmission efficiency factors and engineering practice, provides ideas for the improvement and optimization of heavy commercial vehicle parts, and can also provide reference and reference for those engaged in drive axle design. References | Related Articles | Metrics

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The Improvement of Shift with Automatic Car WANG Zhiqiang 2021, 46(17): 101-104.  DOI: 10.16638/j.cnki.1671-7988.2021.017.029 Abstract ( )   PDF (1164KB) ( )   For the poor shift performance problems of a car, through the fault tree analysis of the various influence factors in detail, the fundamental reason is design flaws exist in the angel between limit gear shift drawing and shift rock arm, and unreasonable design of clearance compensation structure for transmission system. After theoretical analysis and actual loading verification, optimizing the angel between shift wire drawing and shift rocker arm, optimizing clearance compensation structure of transmission system. It improves the shift performance of the car, and provides reference for solving such problems in the later stage. References | Related Articles | Metrics

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Analysis and Treatment of Abnormal Clutch Pedal Engagement Height of a Light Truck GUO Jing 2021, 46(17): 105-108.  DOI: 10.16638/j.cnki.1671-7988.2021.017.030 Abstract ( )   PDF (1303KB) ( )   In the process of debugging and using a light truck, the clutch pedal combination height is sometimes high and sometimes low, and the clutch combination is not smooth. In order to solve the problem, we need to find out the cause of the problem and avoid it happening again in other models. The existing calculation method is to calculate the minimum separation stroke of the clutch pedal, and then compare with the total stroke of the clutch pedal, leaving a reasonable margin to obtain a comfortable clutch pedal engagement height. Obviously, this calculation method can not explain the fault phenomenon. It is also necessary to analyze the movement and force of all relevant parts and hydraulic oil in clutch control device. This paper starts with the flow resistance of the hydraulic oil in the clutch pipeline, finds out the cause of the fault by the method of test and theoretical calculation and analysis, and puts forward the method of troubleshooting. After practical application, it can solve the problem of abnormal clutch pedal combination height. References | Related Articles | Metrics

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The Optimum Design in Cross Shift for a 6-gear Manual Transmission WU Ronghua 2021, 46(17): 109-113.  DOI: 10.16638/j.cnki.1671-7988.2021.017.031 Abstract ( )   PDF (2092KB) ( )   This paper combined with the shifting mechanism of a 6-gear manual transmission, fully into account the deficiency of existing technology in cross shift for domestic commercial vehicle, discussed the causes for the lagging during cross shift in the aspect of structural design by trajectory simulation fitting and interference analyzing, put forward the optimization design and checking method about the cross shift for the shift mechanism included interlock gate plate. And the optimized shift mechanism was validated by testing its cross shift in the whole car. References | Related Articles | Metrics

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Design and Verification of Intelligent Electro Hydraulic Steering System for Commercial Vehicle WAN Minwei 2021, 46(17): 114-116.  DOI: 10.16638/j.cnki.1671-7988.2021.017.032 Abstract ( )   PDF (1208KB) ( )   In order to improve the comfort and safety of commercial vehicles, and enhance the intelligent level of commercial vehicles. For heavy commercial vehicles, an Intelligent Electro-Hydraulic steering system with conventional power assisted mode, torque superposition mode and automatic steering mode is developed based on hydraulic power assisted recirculating ball steering gear and motor, and the decision-making method of man-machine cooperative control for steering system is designed. In order to verify the function and performance of the designed intelligent electro-hydraulic steering system, the steering angle step response test and nozzle function test are carried out. The results indicate that, the step response time of steering angle is less than 23 ms, the steady-state error is less than 0.8 ° and the rise time meets the requirements of steering system, the steering system can switch from the automatic steering mode to the manual intervention mode according to the test requirements. The developed intelligent electro-hydraulic steering system has good performance, which lays a foundation for the intelligent driving of commercial vehicles. References | Related Articles | Metrics

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The Design and Application of Automobile Grounding Terminal SUN Fengchao 2021, 46(17): 117-119.  DOI: 10.16638/j.cnki.1671-7988.2021.017.033 Abstract ( )   PDF (1340KB) ( )   With more and more functions of automobile, the circuit system of automobile is more and more complex, and the number of grounding terminals in automobile is more and more. The grounding terminal is an important part of automobile wiring harness. This paper studies the design and application of a new type of vehicle grounding terminal. By introducing the structure of the new type of grounding terminal, this paper expounds the application scenarios of the new type of grounding terminal, and shows a new form of grounding terminal. With this new type of ground terminal, the installation convenience and fixation reliability of the ground terminal can be improved. References | Related Articles | Metrics

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Design of Transmission Shaft of 6×6 Off-road Vehicle GAO Yingjie 2021, 46(17): 120-122.  DOI: 10.16638/j.cnki.1671-7988.2021.017.034 Abstract ( )   PDF (1474KB) ( )   With the rapid development of Chinese automotive industry, the demand for transmission shafts is growing continuously. How to arrange and select transmission shafts affects the vehicle power, fuel economy and comfort. In the paper, a 6×6 off-road vehicle transmission shaft design as an example, the transmission shaft angle arrangement, length arrangement, torque calculation and other aspects of analysis and calculation, determine transmission shaft arrangement, transmission shaft selection, complete transmission shaft designs. Therefore, reasonable arrangement of transimission system is particularly improve vehicle performance, can make the vehicle performance outstanding, environmental adaptability. References | Related Articles | Metrics

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Corrective Action on Hydraulic Mount Fatigue Cracking LI Xianzhou 2021, 46(17): 123-124.  DOI: 10.16638/j.cnki.1671-7988.2021.017.035 Abstract ( )   PDF (1382KB) ( )   In order to improve the comfort of the vehicle, the common piece of the car adopts the hydraulic suspension. In the development stage of a certain model, the main spring rubber cracking and leakage occurred during the high strength and endurance test. Through road spectrum analysis of durable vehicle and structure analysis of main spring, it is confirmed that too much pre-load in Y direction is the main reason for cracking. By reducing the total dynamic Y displacement to reduce the swing momentum in Y direction, and optimizing the structure design of main spring, the fatigue life of the vehicle is increased by more than 8 times. References | Related Articles | Metrics

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Research on Anti-seepage Water in the Cab of Heavy Truck in Winter YUE Dongdong 2021, 46(17): 125-127.  DOI: 10.16638/j.cnki.1671-7988.2021.017.036 Abstract ( )   PDF (1500KB) ( )   The most basic function of the heavy truck cab is to ensure the safety of the passengers and provide a comfortable driving environment. In parts of northern China in winter, there will be condensation water in the cab after driving for a period of time. This paper starts with the cab structure, analyzes the way the external water source enters the cab and verifies it, puts forward waterproof optimization suggestions from the aspects of optimizing the sealing structure and assembly technology of the cab; analyzes the causes of condensation water inside the cab, and gives the calculation method of condensation water quantity; studies the different gold margins and insulation layer thickness. On the influence of the surface temperature of the cab, an optimization measure is proposed to raise the surface temperature of the cab to the temperature above the dew point of condensed water. References | Related Articles | Metrics

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The Effects on Flow Field Characteristics of Intake Pipe in a Light Truck with Its Structure Optimization XU Min 2021, 46(17): 128-130.  DOI: 10.16638/j.cnki.1671-7988.2021.017.037 Abstract ( )   PDF (1593KB) ( )   The resonator can effectively reduce noise of the intake pipe in a light truck, however, it also has an effect on the flow field. Therefore, it is necessary to study the flow field characteristics of the intake pipe in detail, so as to further improve the structure of the resonator. In this paper, the Fluent15.0 software was used to simulate the flow field characteristics of the intake pipe, and the effects of the resonator on flow field was analyzed in detail. The results show that the resonator can obviously reduce the noise and has a little effect on the flow field of intake pipe. Moreover, the pressure drop was increased by less than 6%. So, the designed resonator is reasonable and can provide a practical significance for the design of the muffler element of the intake pipe. References | Related Articles | Metrics

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Design of Planetary Gear Coupler for Hybrid Electric Vehicle LIU Zimeng 2021, 46(17): 131-133.  DOI: 10.16638/j.cnki.1671-7988.2021.017.038 Abstract ( )   PDF (1198KB) ( )   The performance parameters and characteristics of the planetary gear mechanism of hybrid electric vehicle are analyzed, and the starting process of motor-driven vehicle, engine intervention, electromagnetic locking control unit and other processes are analyzed respectively. The strength, stiffness and modal analysis of the maximum load of the planetary gear coupler are carried out by using the simulation software to verify whether it meets the design requirements in all aspects. References | Related Articles | Metrics

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Research on Lightweight Design of Automobile Body with Multi Material Structure TIAN Meng 2021, 46(17): 134-136.  DOI: 10.16638/j.cnki.1671-7988.2021.017.039 Abstract ( )   PDF (1187KB) ( )   Body lightweight is one of the most important research contents in the automotive industry. It is an effective method to improve the fuel utilization rate and reduce the exhaust emissions. At present, it is an important way to use lightweight materials as the body materials. Compared with the single material body material, using multi material body can really make the right materials used in the right parts, and make the best use of the effect. In this paper, the car body as the research object, with the appropriate materials applied to the appropriate parts of the design concept, combined with the body structure, performance, quality, cost and other aspects to analyze and study the lightweight design method of multi material body. Related Articles | Metrics

Process and Equipment

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A Example Analysis of the Upgrading Transformation with Arc Welding Robots on the Welding Production Line of the Truck Frame ZHANG Ding 2021, 46(17): 137-141.  DOI: 10.16638/j.cnki.1671-7988.2021.017.040 Abstract ( )   PDF (2884KB) ( )   The main frame of a bearing type small truck frame is made of sheet metal longitudinal beams and round tube beams. Previously CO2 gas protection welding process was completed by manual on its producing line, the welding quality was poor, high manufacturing cost and serious environmental pollution. Therefore, on the welding line arc welding process was upgraded and transformed with robots. This paper introduces the planning and implementation process of the transformation, briefly analyzes the difficulties and the overcoming methods, empirical reveals the appropriate process parameters of the arc welding robot, and publishes the operation effect of the arc welding robot after the upgrading transformation for peer reference. References | Related Articles | Metrics

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Structure Design of Blanking Die for Outer Plate Support Plate of Automobile Stamping Parts QIAO Huaying 2021, 46(17): 142-145.  DOI: 10.16638/j.cnki.1671-7988.2021.017.041 Abstract ( )   PDF (1349KB) ( )   The supporting plate of the Automobile Outer Plate is an important component part installed on the car door. It mainly plays the role of supporting between the outer plate and the inner plate of the car door, so as to achieve the effect of protecting seat safety. The stamping die design for the automobile panel can greatly improve the production efficiency. The structure design part mainly includes: Punch and die design, die design, discharge and guide device design, guide device design, positioning parts design, material selection and heat treatment requirements. Finally, the virtual assembly is carried out to check the closing height of the selected press, and the assembly drawing and part drawing of the die are drawn. References | Related Articles | Metrics

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The Design of the Control System for the Main Welding Line of Automobiles Based on PLC ZHANG Zhenyan 2021, 46(17): 146-150.  DOI: 10.16638/j.cnki.1671-7988.2021.017.042 Abstract ( )   PDF (2864KB) ( )   With the development of Industry 4.0, the requirements of production line control system for automobile production enterprises are also gradually improved. It is hoped that the control system can ensure safety and improve the efficiency of automation.In this paper, the control system of main welding line of automobile is designed. Use Siemens TIA software, Cpu1517-3pn /DP as the control core, PROFINET as the control network. The structure can realize the flexible production line of SX12 and BSG multi model hybrid production. According to the process flow of the main welding line, the frame structure of the control network architecture program is determined: field equipment and PLC, network communi -cation between human-machine interface and PLC, the communication network between PLC and PLC. Upper computer screen production and HMI screen function explanation, function realization of alarm screen. References | Related Articles | Metrics

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The Installation Structure Design of Hatchback Car Tail Door Hinge FU Yiqun 2021, 46(17): 151-153.  DOI: 10.16638/j.cnki.1671-7988.2021.017.043 Abstract ( )   PDF (1797KB) ( )   The paper designed a new type of "little goose neck" tailgate hinge and its mounting point sheet metal structure, which can meet the outward opening of the tailgate and top cover slit envelope, the demand for top cover beam avoidance is reduced, and the cross-sectional performance of the top cover beam is increased, and the rear field of view of the coupe model can be maximized if the cross-sectional performance of the top cover cross-section is satisfied. Taking a certain model as an example, this paper expounds the method of structural optimization in the product design process. References | Related Articles | Metrics

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Application and Research of Saturated Steam Cleaning and Sponge Ball Cleaning Technology in Hydraulic Pipeline Cleaning LIU Yanxi 2021, 46(17): 154-156.  DOI: 10.16638/j.cnki.1671-7988.2021.017.044 Abstract ( )   PDF (2279KB) ( )   In order to improve the cleanliness of hydraulic pipeline of construction machinery and reduce unnecessary loss, the cleaning technology of saturated steam cleaning technology combined with sponge ball jet cleaning technology is introduced, which has achieved good results and effectively ensures the cleanliness of hydraulic hose and hard hydraulic pipe in this paper. It reduces the occurrence of pipe blockage and wear in the hydraulic system, and improves the reliability of the hydraulic transmission system. References | Related Articles | Metrics

Use and Maintenance

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The Analysis and Improved of Sealing Structure for Differential Lock Indicator Light Switch DONG Juan 2021, 46(17): 157-159.  DOI: 10.16638/j.cnki.1671-7988.2021.017.045 Abstract ( )   PDF (954KB) ( )   This paper Introduces the working principle of differential lock indicator light switch and the common faults of the sealing structure. Analyzes the faults, and puts forward an effective scheme to improve the sealing structure, which can fundamentally reduce the failure rate of differential lock indicator light switch and improve the service life of differential lock indicator light switch. References | Related Articles | Metrics

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Experiment Summary Report on Abnormal High Voltage Power Supply of Geely EV450 WANG Shixiong 2021, 46(17): 160-163.  DOI: 10.16638/j.cnki.1671-7988.2021.017.046 Abstract ( )   PDF (5517KB) ( )   In this paper, it takes the abnormal high -voltage power supply of the new-energy automobile Geely EV450 as the object. Through the diagnosis and maintenance of the failure of EV450, it pays attention to the explanation of the importance of the experiment, the purpose of the experiment, the experimental equipment and the experimental principle, the experi -mental procedure, the experimental results, the data analysis, the experimental matters needing attention and equipment maintenance. Though the experiment, it can help us know the diagnosis and maintenance of new-energy vehicles, which plays a key role in the follow-up technical learning of new energy vehicles. References | Related Articles | Metrics

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Research on Common Problems of Difficulties in Starting Automobile Engines YANG Lijun 2021, 46(17): 164-166.  DOI: 10.16638/j.cnki.1671-7988.2021.017.047 Abstract ( )   PDF (943KB) ( )   In order to deal with the problem of engine starting difficulty in the past, ensure the safety and reliability of automobile driving, and create more convenience for people's travel interaction, this paper combines two types of automobile engine starting difficulty, including sudden and secondary, analyzes their respective causes, and explores the corresponding treatment methods, Among them, the methods to deal with the secondary generator starting difficulties are to check the oil, remove the throttle carbon deposition, check the fuel pressure and misfire, etc. Through the reasonable application of the above methods, it can reduce the occurrence of automobile engine starting difficulties, which is worthy of promotion. References | Related Articles | Metrics

Automobile Education

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Research and Practice of Teaching Application Based on MR Technology —Take the Course of Power Battery and Management System Maintenance as an Example CHEN Xiaopeng 2021, 46(17): 167-169.  DOI: 10.16638/j.cnki.1671-7988.2021.017.048 Abstract ( )   PDF (1307KB) ( )   Traditional teaching methods have been difficult to achieve the teaching objectives of new energy vehicle professional courses with abstract content, and MR technology brings new possibilities for teaching with its powerful advantages. Taking Power Battery and Management System Maintenance professional course as an example, this paper studies the realization path of MR technology in teaching and the teaching design based on MR technology, so as to provide experience reference for the application of MR technology in the teaching of other new energy vehicle technology professional courses. References | Related Articles | Metrics

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Research on the Teaching Reform and Innovation of the Core Courses of Auto Repair Expansion ZENG Fanling 2021, 46(17): 170-173.  DOI: 10.16638/j.cnki.1671-7988.2021.017.049 Abstract ( )   PDF (1248KB) ( )   Auto repair enrollment expansion; Three levels and four strategies; Online and offline convergence; Network teaching resources; Reconstruction of curriculum system References | Related Articles | Metrics

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Innovative Online and Offline Hybrid Teaching Mode for Higher Vocational Automobiles Based on "Smart Resources" SUN Huan 2021, 46(17): 174-176.  DOI: 10.16638/j.cnki.1671-7988.2021.017.050 Abstract ( )   PDF (1057KB) ( )   Focusing on the post skills generally required by automobile enterprises, we should highlight the dominant position of students, teach students in accordance with their aptitude, build the curriculum "intelligent resources" integrating teaching design, virtual training and teaching evaluation, flexibly apply them to the hybrid teaching of online learning and classroom teaching, online theory and offline training, and formulate the teaching links of "conventional teaching" and "teaching without stopping" .Through online interaction and offline summary, problem exchange and collaborative learning between teachers and students can be realized. To establish a diversified assessment and evaluation mode combining process and end, and finally realize the perfect docking of students' core competence and enterprise post requirements. References | Related Articles | Metrics

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Reform and Practice of Practical Teaching Mode for Applied Undergraduate Engineering Majors —Taking Vehicle Engineering as an Example LANG Zhongjie, SUN Changyong 2021, 46(17): 177-180.  DOI: 10.16638/j.cnki.1671-7988.2021.017.051 Abstract ( )   PDF (1149KB) ( )   Application-oriented undergraduate colleges are different from research-oriented universities and skilful voca -tional colleges in terms of student sources and training objectives. How to achieve the training objectives of applicationoriented and innovative talents in engineering under the background of mass innovation and innovation has become a new issue urgently needed to be solved by such colleges. Guided by the CDIO engineering education concept, this paper reforms the practice teaching mode, innovatively integrates the practice teaching content, and establishes a scientific and reasonable practice teaching evaluation system. Based on this, it breaks down the gap between schools and enterprises and forms a school-enterprise "double-subject" education mechanism. References | Related Articles | Metrics

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Continuing Education Model of Technical Talents Based on Vocational Skilled Evaluation AN Yuanan 2021, 46(17): 181-184.  DOI: 10.16638/j.cnki.1671-7988.2021.017.052 Abstract ( )   PDF (1552KB) ( )   In order to improve students' post-service vocational skills evaluation and meet the needs of technical skills improvement, this paper starts from the needs of enterprises, takes the construction of double-high brand as the guide, and takes enterprises as the carrier to establish vocational skills evaluation courses. Through the vocational skills competition, the reward system of skilled personnel and the salary guarantee system to demonstrate the post-job integrated quality model training course; Finally, the construction and evaluation of the curriculum should be improved with the information tools as the means and the guarantee of great craftsmen and famous skilled teachers. The research shows that: based on the above curriculum system, it can effectively cultivate highly skilled professionals who serve the society and meet the needs of enterprises. References | Related Articles | Metrics

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The Application of "Internet+Task Drive" in the Course of Automobile Engine Electronic Control System YANG Xingguo 2021, 46(17): 185-188.  DOI: 10.16638/j.cnki.1671-7988.2021.017.053 Abstract ( )   PDF (1049KB) ( )   The article starts from the learning status of students in higher vocational colleges and uses the "Internet + task-driven" teaching method to explore how to improve the enthusiasm of students in higher vocational colleges. Relying on online course platforms such as Smart Vocational Education, MOOC, Vocational Education Cloud and Tencent Classroom, as well as the Chongqing University Online Open Course Platform, which is widely used by Chongqing universities, and the school’s self-developed Smart Classroom and other networking platforms, the "Automotive Engine Electronic Control System Diagnostics and Repair" online course resources, combined with offline loose-leaf textbooks, carry out task-driven teaching methods, so that students can actively participate in classroom teaching to achieve the goal of completing a task and gaining a skill in the previous class. References | Related Articles | Metrics

Standards Regulations Management

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The Application of Value Engineering and Value Analysis in Automobile Industry HE Wei 2021, 46(17): 189-194.  DOI: 10.16638/j.cnki.1671-7988.2021.017.054 Abstract ( )   PDF (1718KB) ( )   This paper mainly introduces the definition of VAVE and related work process, discusses the implementation and application methods of value engineering and value analysis in automobile manufacturing industry. And through some examples for readers understand. The article also reflects several different charts for cost reduction income, pointing out the existing problems in the implementation process of VAVE and the direction of improvement. References | Related Articles | Metrics

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Analysis and Improvement of Auto Wiring Harness Terminal Pin Back Fault WU Huaiwei 2021, 46(17): 195-197.  DOI: 10.16638/j.cnki.1671-7988.2021.017.055 Abstract ( )   PDF (1529KB) ( )   The innovation and development strategy of intelligent vehicles has been clearly put forward, including strengthening industrial safety and risk prevention and control, establishing the safety management system of intelligent vehicles, and enhancing the safety and protection ability of network information system[1] . Car safety, first of all, is the safety of the car itself. Based on a certain car chassis electrical box harness terminal needle back, for example, using the fault tree analysis to auto harness terminal retreat needle fault analysis and improvement, its purpose is to improve the safety of the car itself, improve the quality of the vehicle, and can meet the needs of the user safe driving of a better life, at the same time provide a reference for later models of development, to provide reference for similar failure analysis and improvement. References | Related Articles | Metrics

Overview

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Application of Magnetorheological Damper in Automobile Suspension Damping System YU Long 2021, 46(17): 198-200.  DOI: 10.16638/j.cnki.1671-7988.2021.017.056 Abstract ( )   PDF (1108KB) ( )   In order to improve the comfort and maneuverability of the vehicle, magnetorheological damper is installed in the vehicle suspension damping system. Based on the components of magnetorheological fluid, its working principle is analyzed, and three working modes of magnetorheological damper are described. The control and test methods of semi-active damping system of automobile suspension are studied, which provides theoretical support for the application of magnetorheological damper in automobile suspension.This paper introduces the application of magnetorheological damper in automobile field at home and abroad, and expounds the importance of magnetorheological fluid in automobile suspension damping system. References | Related Articles | Metrics

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Development Status and Future Trend of Automobile Intelligent Cockpit FENG Yuanyang 2021, 46(17): 201-206.  DOI: 10.16638/j.cnki.1671-7988.2021.017.057 Abstract ( )   PDF (2187KB) ( )   The development of intelligent internet connected vehicle is not only reflected in the automatic driving technology, but also in the interaction between human and machine. Embodying the human-computer interaction mostly, the intelligent cockpit is required to constantly absorb new concepts and cutting-edge technologies and keep path with the development trend of automobile. By investigating the development status of cockpit at home and abroad, this paper abstracts five key points of cockpit development: diversified control, acousto-optic technology, safety and health detection, information service and intelligent mode, which will trigger provoking thought of intelligent, humanized, customized and highly integrated cockpit in the future. Combined with the traditional structure of the current automobile industry and the future demand of consumers, this paper point out the development strategy of intelligent car cabin in the future. References | Related Articles | Metrics

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Survey of Object Detection Algorithms Based on Deep Learning ZHAO Zishan 2021, 46(17): 207-209.  DOI: 10.16638/j.cnki.1671-7988.2021.017.058 Abstract ( )   PDF (1161KB) ( )   The purpose of object detection is to recognize the category of specific objects and the position in the image, which can be applied to the field of artificial intelligence such as pedestrian, object, face detection and intelligent transporta -tion. Nowadays, neural network technology based on deep learning has been gradually integrated into people's life, and deep convolution neural network has also made remarkable achievements in various fields of computer vision. This paper will introduce the research progress of target detection algorithm based on deep learning, the characteristics of common data sets and the key parameters of performance evaluation. It will systematically describe the main target detection algorithms, the basic framework, advantages and disadvantages, and prospect the problems and research trends of current target detection algorithms. References | Related Articles | Metrics

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A Review on Stability Control Technology of Distributed Drive Electric Vehicle JIANG Wenhao 2021, 46(17): 210-211.  DOI: 10.16638/j.cnki.1671-7988.2021.017.059 Abstract ( )   PDF (991KB) ( )   With the development of automobile industry, distributed drive electric vehicle is widely used, and the research on distributed vehicle stability control technology is more and more in-depth. This paper first analyzes the vehicle stability control parameters, then introduces the commonly used vehicle yaw stability control methods and summarizes their research status. Finally, the development trend of vehicle stability control is summarized. Distributed driving vehicle has flexible tire longitudinal force and distributed motor has independent control motor torque. The stability of vehicle yaw can be improved by adopting the method of reasonable distribution of wheel yaw torque. References | Related Articles | Metrics

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Survey of Point Cloud Registration Algorithms Based on Lidar YI Mingyue 2021, 46(17): 212-214.  DOI: 10.16638/j.cnki.1671-7988.2021.017.060 Abstract ( )   PDF (1178KB) ( )   Point cloud registration is one of the key technologies of simultaneous localization and mapping (SLAM) based on lidar. The ultimate goal of point cloud registration is to solve the transformation matrix of different posture point clouds in the same coordinate system, and use this matrix to achieve accurate registration of multiple scan point clouds, so as to obtain the transformation of vehicle body position and posture. This article first introduces the idea of point cloud registration, summarizes and explains the development status of iterative closest point (ICP) algorithm and normal distribution transformation (NDT) algorithm, and then mainly introduces two. References | Related Articles | Metrics

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Analysis of the Influence of Smart Phone Use Behavior on Driving Reliability HE Ziqin 2021, 46(17): 215-217.  DOI: 10.16638/j.cnki.1671-7988.2021.017.061 Abstract ( )   PDF (1124KB) ( )   There is a high correlation between the use of smartphones while driving and the incidence of traffic accidents. Mobile phone use behavior will lead to drivers' distraction, affect their disposal judgment and road analysis and other abilities, thus bringing huge hidden dangers to driving safety. Based on the information processing mechanism and attention allocation theory of driving behavior, this paper analyzes the influence process of mobile phone use behavior on driving reliability from the aspects of visual resource consumption and cognitive resource consumption of mobile phone use behavior. The results show that in the process of driving, drivers' use of mobile phones occupies visual and cognitive resources of driving behavior, which leads to a decrease in the processing speed of driving information, thus leading to a decline in driving performance and a negative impact on driving reliability. References | Related Articles | Metrics

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Study of Drum Spiral Direction and Wire Rope's Lay Direction of Oil Drilling Drawworks CHENG Li 2021, 46(17): 218-220.  DOI: 10.16638/j.cnki.1671-7988.2021.017.062 Abstract ( )   PDF (1667KB) ( )   In the field of oil drilling and production, the selection of drum rotation direction and wire rope twist direction of drilling winch has been a big controversy. The author briefly introduces the common types and twist direction of drilling wire rope, and analyzes the characteristics and rotation direction of drum rope groove of drilling winch. The relationship between the roller rotation direction and the wire rope twist direction in single and multi-layer winding is discussed respectively. The scope of drum winding wire rope under drilling condition is analyzed, and the matching viewpoint of drum rotation direction and wire rope twist direction is put forward. According to the actual operation process, the drilling wire rope should be selected correctly to reduce the phenomenon of random rope and prolong the service life of wire rope. References | Related Articles | Metrics