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30 August 2022, Volume 47 Issue 16 Previous Issue    Next Issue
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New Energy Vehicle
Intelligent Connected Vehicle
Design and Research
Testing and Experiment
Process and Equipment
Automobile Education
Standards Regulations Management
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New Energy Vehicle

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Fault Diagnosis and Troubleshooting of BYD Qin EV Charging System WANG Yu 2022, 47(16): 1-5.  DOI: 10.16638/j.cnki.1671-7988.2022.016.001 Abstract ( )   PDF (5250KB) ( )   A 2019 BYD Qin EV battery electric vehicle has a failure to charge. This article takes the failure to charge as a starting point, introduces the difference between the 2019 BYD Qin EV and the same model of the previous generation, and briefly explains the working principle and process of the chargings system. Combined with the actual situation, the paper summarized several common fault phenomena and corresponding data flows in the system, and pointed out the possible range of faults by combining phenomena. In addition, combining the problems that novices are prone to, we propose specific fault diagnosis methods for reference. References | Related Articles | Metrics

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Range Test of Battery Electric Vehicles Based on Chassis Dynamometer on Multi-objective Planning CHENG Zhangqian 2022, 47(16): 6-9.  DOI: 10.16638/j.cnki.1671-7988.2022.016.002 Abstract ( )   PDF (523KB) ( )   With the development of society, the sales of electric vehicles have grown rapidly every year, the ministry of Industry and Information Technology has become more and more stringent in the regulation of the range of battery electric vehicles and the restrictions on energy consumption, therefore, the energy consumption must meet the requirements of regulations, so the accuracy of the test results has higher requirements. This article mainly analyzes the coasting principle of the chassis dynamometer, and then analyzes the motor torque difference of the chassis dynamometer before and after the test, which can compare and reflect the battery electric vehicle's range accuracy, this also provide better guidance for the development and application of transmission systems in the future. References | Related Articles | Metrics

Intelligent Connected Vehicle

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Multi-scene Trajectory Planning of Intelligent Vehicle Based on Frenet Coordinate System TIAN Mengting 2022, 47(16): 10-17.  DOI: 10.16638/j.cnki.1671-7988.2022.016.003 Abstract ( )   PDF (1446KB) ( )   Trajectory planning is an important part of behavior decision-making module in intelligent vehicle, and it is also an important part of cooperative vehicle infrastructure system. Compared with the traditional Cartesian coordinate system, Frenet coordinate system has obvious advantages in vehicle planning algorithm. A multi-scene trajectory planning model for intelligent vehicle based on Frenet coordinate system is proposed. Firstly, based on Frenet coordinate system and vehicle dynamics model, trajectory planning models in horizontal and vertical dimensions are built. Then the trajectory optimization functions in high-speed scene, low-speed scene, car following and other cases are established. Finally, simulation is performed and the results show that the model is reliable and accurate to realize trajectory planning in various scenes effectively. References | Related Articles | Metrics

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An Optimization Method of FSC Racing Car Steering Trapezoid Based on Chi-square Mutation SSA WANG Jiaxin 2022, 47(16): 18-24.  DOI: 10.16638/j.cnki.1671-7988.2022.016.004 Abstract ( )   PDF (1000KB) ( )   Aiming at the problem that the swarm intelligence optimization algorithm turns to trapezoidal optimization in space at the later stage of the iteration, the global search ability is weakened and the algorithm is easy to fall into the local optimal solution, a turning trapezoidal optimization method based on chi-square mutation sparrow search algorithm is proposed. First, use the chi-square distribution to improve the update formula when the discoverer executes a broad search strategy. Secondly, perform chi-square mutation operations on individuals whose fitness is less than the average fitness of the population to increase the diversity of the population while retaining the partial search capabilities of the sparrow search algorithm, Improve the ability of the algorithm to jump out of the local optimal solution. The experimental results show that, compared with the basic sparrow search algorithm and the improved sparrow search algorithm using Gaussian distribution and Gaussian mutation, the optimization method in this paper improves the optimization accuracy by 5.44% and 4.35%, and the robustness by 57.78% and 65.99%, but the average time consumption increases by 83.47% respectively and a reduction of 3.99%. According to this, the algorithm optimization method in this paper has higher precision and stronger robustness than the basic sparrow search algorithm optimization method, and the global optimization ability is improved. References | Related Articles | Metrics

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Research on Planning and Tracking of Lane-changing Trajectory Based on Frenet Coordinate System HUA Hang 2022, 47(16): 25-30.  DOI: 10.16638/j.cnki.1671-7988.2022.016.005 Abstract ( )   PDF (1648KB) ( )   To solve the problem of automatic lane changing of vehicles in the expressway environment, the fifth-order polynomial algorithm in the Frenet coordinate system is used to design and plan the trajectory according to different working conditions. First, estimate the straight-line distance required for lane change according to the state of the vehicle and surrounding vehicles, and perform fifth-order polynomial trajectory planning multiple times within a certain range to obtain candidate trajectories. Finally, with the minimum jerk as the optimization objective, all trajectories in the candidate trajectory set are evaluated to obtain the optimal lane change trajectory. CarSim is used for vehicle and road modeling, trajectory planning in Matlab/Simulink, and model predictive control of dynamic models is used for trajectory tracking, which verifies the effectiveness of the lane-changing assistant system. References | Related Articles | Metrics

Design and Research

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Development of Automobile OBD Data Acquisition Module Based on NXP RT1064 YUAN Jiahong 2022, 47(16): 31-35.  DOI: 10.16638/j.cnki.1671-7988.2022.016.006 Abstract ( )   PDF (1010KB) ( )   Controller area netword bus is the main way for onboard electronic components to communicate. Onboard diagnostic interface, as an output end of the bus signal, is used to detect the working state of onboard equipment. In addition, it outputs the working state parameters of the engine and chassis for the analysis of vehicle conditions. In order to realize onboard onboard diagnostic interface signal collection, NXP RT1064 is used as the control unit to design the onboard diagnostic interface transceiving module, power supply module, control button and other peripheral circuits. The onboard diagnostic interface data to be recorded is sent to the external storage module through the serial port every second, and at the same time to the SPI serial TFT display. Real-time observation and acquisition of vehicle operating parameters are realized. References | Related Articles | Metrics

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Kinematics Simulation Analysis on Front and Rear Suspension of a Car MEI Xueqing 2022, 47(16): 36-41.  DOI: 10.16638/j.cnki.1671-7988.2022.016.007 Abstract ( )   PDF (1204KB) ( )   In the course of a car the wheels jump up and down with the change of road roughness and speed, the wheel drives the other components of the suspension through the arm and causes the corresponding deformation of these components. In order to analyze the influence of suspension component motion deformation on different wheel alignment parameters, according to a car front and rear suspension and other main assembly structure size and characteristics, the multi-body dynamics software Adams was used to build Multi-rigid-body dynamics model of a car. The rigid-flexible coupling model was established by the flexible treatment of some steering elements of suspension. The suspension kinematics simulation was carried out, and the simulation changing curve of wheel alignment parameters was obtained. The results were compared with the test curves of actual kinematic parameters, and it was found that the kinematics simulation results of the rigid-flexible coupling model were more close to the actual test curve. The simulation results can provide a reference for the design and selection of car suspension system. References | Related Articles | Metrics

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A Design Optimization for AMT Clutch Support Scheme in a Commercial Vehicle PENG Bangliang 2022, 47(16): 42-47.  DOI: 10.16638/j.cnki.1671-7988.2022.016.008 Abstract ( )   PDF (3882KB) ( )   This paper first introduces some failure problems found in clutch system assembled in a commercial vehicle during development verification processes. Focus on using CAE simulation and test technology to optimize and verify designs, which reduces time costs for solving test problems. At the same time, by inducing analysis processes and methods, it provides useful references for analyzing and solving failure problems with other vehicle parts, it provides technical path and test data for the optimization of clutch support scheme in a commercial vehicle. References | Related Articles | Metrics

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Design and Development of Atmosphere Lamp Structure for Automobile Combination Instrument LI Xuemei 2022, 47(16): 48-52.  DOI: 10.16638/j.cnki.1671-7988.2022.016.009 Abstract ( )   PDF (2365KB) ( )   The combination instrument is an important part of the interior of the car, in the process of driving, it provides all kinds of information and data for the driver. With the development of science and technology, drivers have higher and higher requirements for the structural modeling of the combination instrument, and hope to provide high-tech display effect and more comfortable driving experience. This paper studies the structural design of the atmosphere lamp of various automobile combination instruments, through the analysis of the structural design and development of transparent upper cover, front frame, light guide plate, black film, RGB-LED and so on, a hidden atmosphere lamp structure of combination instruments is designed, which solves the problems of single color, uneven backlight and high cost of the atmosphere lamp of automobile combination instruments. The display effect of the atmosphere light and the driving experience of the automobile combination instrument is improved. At the same time, it provides an effective reference for the structural design of automobile combination instrument, so as to achieve a fashionable and high-end automobile interior display effect. References | Related Articles | Metrics

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Design and Development of Remote Quality Testing Software for Automobile Transmission CHEN Qiao 2022, 47(16): 53-57.  DOI: 10.16638/j.cnki.1671-7988.2022.016.010 Abstract ( )   PDF (1000KB) ( )   With the development of automotive technology, the assembly of auto parts is becoming more and more highly integrated. After the automobile transmission is assembled to the whole vehicle, it is difficult to inspect its quality. Therefore, it is urgent to develop a set of transmission quality inspection methods and software based on the assembled state of the whole vehicle. Based on this, the paper firstly conducts in-depth research on the detection method principle, and summarizes the quality detection method of automobile transmission, and then combines with the programming design idea to design the overall structure of the detection program.Then the characteristics of various mainstream development platforms and programming languages were investigated, and the graphical programming language (LabVIEW) was used to design and develop an automobile transmission quality inspection program combined with "cloud testing" based on the pre-designed program structure and functional modules. Finally, the detection program is deployed on the remote computer to verify the remote test function. References | Related Articles | Metrics

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Analysis and Solution of Engineering Vehicle Tire Explosion-proof Technology FAN Fei 2022, 47(16): 58-61.  DOI: 10.16638/j.cnki.1671-7988.2022.016.011 Abstract ( )   PDF (899KB) ( )   The engineering vehicle frequently encountered in the process of running between the double tire inclusions cause blowout accidents, through the market investigation and analysis of survey data in this paper, this situation of vehicle repeatedly study practice, combining with the existing technology and cost control aspects, using the photoelectric sensor for truck inclusion between dual tire situation put forward a kind of intelligent identification scheme. It avoids the risk of tire explosion caused by inclusions between two tires and provides a new idea for the safe driving of engineering vehicle. References | Related Articles | Metrics

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Design and Development of a Light Truck Frame LI Fei 2022, 47(16): 62-64.  DOI: 10.16638/j.cnki.1671-7988.2022.016.012 Abstract ( )   PDF (1213KB) ( )   Truck frame is the basic component of the vehicle. In the design and development, it is necessary to consider the different requirements of users, including the universality and bearing capacity of frame installation. It is also necessary to consider issues from the manufacturing, such as the universality, manufacturability, cost and other factors of parts. Aiming at the new loadbearing requirements of light trucks, based on the mature basic platform, this paper strengthens the design of the weak parts of the frame to form new products to meet the needs of users and manufacturers at the same time. In the design and development, the combination of computer adied engineering (CAE) virtual analysis and actual stress test is used to achieve the goal of quickly and accurately determining the final scheme. References | Related Articles | Metrics

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Application of Mule Car Parts Restructuring Scheme WU Yanjie 2022, 47(16): 65-68.  DOI: 10.16638/j.cnki.1671-7988.2022.016.013 Abstract ( )   PDF (1125KB) ( )   In order to speed up the development process of new products, in the early stage of new product development, relevant design scheme verification is generally achieved by making Mule cars. At this time, because the parts are still in the data design stage, in order to achieve the verification of relevant design scheme, relevant parts should be adapted to meet the requirements of Mule car assembly. The precision and strength of Mule vehicle components directly affect the effectiveness of product design validation. Mule car parts restructuring strength and precision are mainly determined by structure, material, process, tooling and other factors. This paper mainly studies the restructuring process, scheme design, structure, technology and tooling of Mule car parts to ensure its precision and strength, so as to realize the verification of relevant design schemes. References | Related Articles | Metrics

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Design of the Old Motor Vehicles Evaluation System GAO Jingwen 2022, 47(16): 69-72.  DOI: 10.16638/j.cnki.1671-7988.2022.016.014 Abstract ( )   PDF (925KB) ( )   With the continuous growth of the number of motor vehicles in my country, the old motor vehicles trading market has ushered in a broad development prospect. At the same time, the national old motor vehicles trading market still lacks a scientific and complete evaluation system. After comparing the appraisal and evaluation methods of old motor vehicles at home and abroad, this paper introduces the selection of old motor vehicles evaluation methods and the determination of evaluation parameters. After analyzing the influencing factors of the replacement rate, an improved calculation formula of the replacement rate is proposed, and the replacement cost method is optimized. This paper improves the existing evaluation system of old motor vehicles, and integrate the results of comprehensive performance testing of vehicles into the evaluation indicators, and the evaluation price is more in line with the actual situation of the vehicle, protect the legitimate rights and interests of consumers, and standardize the transaction order of the old motor vehicles market to promote the healthy development of the old motor vehicles industry. References | Related Articles | Metrics

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R-angle Detection Method for Bodywork Based on Line Structured Light ZENG He 2022, 47(16): 73-78.  DOI: 10.16638/j.cnki.1671-7988.2022.016.015 Abstract ( )   PDF (1877KB) ( )   The R Angle measurement process of auto-body will be affected by the measurement Angle and measurement environment, resulting in less extracted feature information and low fitting accuracy. In this paper, a feature data extraction and fitting method of circular arc is proposed. Firstly, the noise data is eliminated by bilateral filtering, and then the feature data can be effectively screened against the point cloud of incomplete circular arc by using the proposed method, and the feature data can be fitted by iterative reweighted least square algorithm. Based on the experimental verification of the proposed method, the measurement results were compared with the coordinate measuring machine (CMM) results, and the average error of the line laser measurement was 0.018 mm, which was 0.006 1 mm lower than the average error of the R gauge measurement. References | Related Articles | Metrics

Testing and Experiment

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Sealing Analysis of Oil Cooled Multi-in-one Electric Drive Assembly HU Di 2022, 47(16): 79-83.  DOI: 10.16638/j.cnki.1671-7988.2022.016.016 Abstract ( )   PDF (1062KB) ( )   During the road test of a gearbox of electric vehicle, the problem of leakage from the plug of lubricating oil route was found. Through the analysis of sealing performance of copper gasket by computer adied engineering (CAE) simulation, it is found that the roughness of housing has a great influence on sealing performance and there is a risk of leakage. The sealing performance of type E rubber washer was analyzed by finite element simulation, and the leakage was greatly reduced by airtight test, and the maximum pressure was up to 200 kPa. The results show that type E rubber washer can not only eliminate the leakage problem, and also the sealing performance of type E rubber washer in reverse loading has a great impact. References | Related Articles | Metrics

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The Application of Electronic Brake System in a Commercial Truck CAI Suoning 2022, 47(16): 84-89.  DOI: 10.16638/j.cnki.1671-7988.2022.016.017 Abstract ( )   PDF (1082KB) ( )   The electronic brake system is an electronic control brake system, which combines conventional air brake and electronic brake. It is a great innovation in the field of vehicle active safety control in recent years which effectively improves the safety, comfort, and intelligence of vehicles. This paper introduces the main components and functions of the lectronic brake system, focusing on a domestic 4×2 truck, according to the test requirements of GB 7258—2017, GB 12676—2014 etc, the four functions of brake response time, deceleration control, emergency brake assist and external brake request are tested and analyzed, and compared with conventional air brake. The data show that the response time of the front and rear axles is significantly shortened and the braking safety is higher when the electronic brake system truck is assembled, and the deceleration of empty and full-loaded vehicles can fall on the target deceleration curve with high control accuracy. After activating the emergency brake function, the same pedal position will control the corresponding action components output greater braking pressure for braking; after opening the external request braking mode, the vehicle will brake according to the set deceleration, and the control deviation meets the requirements, and the braking deceleration control is good. References | Related Articles | Metrics

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Analysis of Kinematics Compliance Test XU Shenmin 2022, 47(16): 90-95.  DOI: 10.16638/j.cnki.1671-7988.2022.016.018 Abstract ( )   PDF (2804KB) ( )   Vehicle handling stability is known as the "lifeline of high-speed vehicles". With the development of society, road conditions are gradually improved, the design of the highest vehicle speed is gradually increased, handling stability is increasingly paid attention to, known as one of the main performances of the vehicle. Suspension system as the foundation of steering stability, full understanding of suspension system for more performance, kinematics compliance test is necessary, the establishment of the kinematics compliance test ability can improve chassis development ability, kinematics compliance objective data combined with computer adied engineering (CAE) simulation results contrast test, can be found in advance chassis suspension defects and the risk point, improve the overall performance of the product. This paper mainly introduces the kinematics compliance test process, test conditions, test curve and the meaning of the curve representative, to provide a certain reference for the follow-up operation stability adjustment. References | Related Articles | Metrics

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Experimental on NVH Performance of a Commercial Pickup Truck HUANG Yi 2022, 47(16): 96-99.  DOI: 10.16638/j.cnki.1671-7988.2022.016.019 Abstract ( )   PDF (2118KB) ( )   Jiangling Motors Company Limited References | Related Articles | Metrics

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Analysis of Vehicle Attitude Parameters Based on Sine with Dwell Test LUO Shuai 2022, 47(16): 100-103.  DOI: 10.16638/j.cnki.1671-7988.2022.016.020 Abstract ( )   PDF (1532KB) ( )   As one of the important part of automobile, electronic stability control system can improve the ability of obstacle avoidance effectively and the sine with dwell test is used to verify the performance of electronic stability control. The sine with dwell test was carried out under the robot. Firstly, The test results are verified to meet the national standard, and then the yaw rate and the mass center side slip angle are further analyzed. The results show that the yaw rate and mass center side slip angle can effectively characterize the state of the vehicle during the test and provide reference for vehicle electronic stability control performance evaluation. References | Related Articles | Metrics

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Analysis on Fretting Wear of Gear Clutch in a Hybrid Transmission HUA Xiaobo 2022, 47(16): 104-109.  DOI: 10.16638/j.cnki.1671-7988.2022.016.021 Abstract ( )   PDF (1509KB) ( )   Fretting wear failure of connecting spline between friction plate and inner hub occurred in durability test of a hybrid transmission gear clutch. Based on the fretting wear theory, the key factors affecting the wear amount were found out. Combined with finite element analysis (FEA), the failure problem was repeated, and found the main reasons for the failure were the shaft bending deformation, the outer hub axial deformation and the spline tooth contact stress. After considering the space limitation, suggested to reduce the contact stress as the main scheme. By increasing the number of spline teeth and exchanging the connect spline between friction plate and steel plate, the inner hub spline contact stress could be effectively reduced by 85% in theory, and which was further confirmed by finite element analysis could be reduced by over 75%. The final improvement scheme passed the clutch durability test certification. The results provides some guidance for solving the fretting wear problem in the transmission. References | Related Articles | Metrics

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Analysis the Relationship of the Suspension System Durability and Vehicle Durability Test WANG Xinwei 2022, 47(16): 110-114.  DOI: 10.16638/j.cnki.1671-7988.2022.016.022 Abstract ( )   PDF (1486KB) ( )   This paper proposes a method that the pseudo damage equivalent method of the rig suspension system durability test by specific sine wave and the road test, which based on the miner linear-damage accumulation theory, correction the failure mode of the suspension durability and the road test by reliability analysis, to prove the standard and modified. It provides a new method to obtain fast target spectrum for rig suspension system durability test. References | Related Articles | Metrics

Process and Equipment

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Quality Improvement of Vehicle Radiator WU Xuefeng 2022, 47(16): 115-118.  DOI: 10.16638/j.cnki.1671-7988.2022.016.023 Abstract ( )   PDF (2073KB) ( )   As the key component of vehicle engine cooling system, the reliability of radiator has a great influence on the performance of vehicle engine. Once the radiator is damaged and the engine works for a certain period of time, the engine body heating will lead to the decline of the lubrication system performance, resulting in the engine dynamic performance, reliability and safety reduction. Market feedback radiator leakage problem is prominent, seriously affecting the operation of vehicles, while resulting in high after-sales claims. Through failure mode analysis, material metallographic analysis, competitive bidding, road spectrum test, bench test and simulation analysis, from the design optimization, process improvement, the optimization measures of the radiator and its mount are put forward to improve the reliability of the product. References | Related Articles | Metrics

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Fracture Failure Analysis of a Plastic Spring Seat ZHANG Zhongrong 2022, 47(16): 119-122.  DOI: 10.16638/j.cnki.1671-7988.2022.016.024 Abstract ( )   PDF (2310KB) ( )   In order to find out the cause of the fracture failure of the plastic spring seat and come up the solution, the failure sample was analyzed by microscope, scanning electron microscope, Fourier infrared spectrometry, and synchronous thermal analyzer. The results show that the failure part is made of PA66 + GF, and the cooperation between PA66 resin and GF at the fracture point is uneven and non-dense, the main cause of failure is stress concentration which occurred in during installation. To avoid this kind of fracture, it is suggested that the injection molding process of PA66 should be controlled to ensure the uniform distribution of PA66 and GF, and the plastic spring seat should be correctly placed in the assembling to avoid stress concentration and reduce fracture. References | Related Articles | Metrics

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Technology and Application of On-line Measurement of Car Body Gap and Flush WU Guohui 2022, 47(16): 123-127.  DOI: 10.16638/j.cnki.1671-7988.2022.016.025 Abstract ( )   PDF (1412KB) ( )   Car body matching quality is an important aspect of vehicle quality evaluation. If the matching quality is not up to standard, it will directly affect the user's sensory experience, and will also bring about problems such as sealing, operating force, and wind noise. As a means of detecting the matching quality of the car body, the on-line measurement technology of gap and flush has been applied more and more. The system composition, operating environment and performance parameters, measurement principles and scenarios of the on-line measurement of gap and flush are expounded, and the plane layout, measurement point selection, measurement process, system test content and evaluation criteria, and realized functions are introduced with practical application cases, and The influencing factors of measurement accuracy are discussed. Through the application of the gap and flush on-line measurement system, 100% measurement of the key matching points of the car body can be achieved, and it has the characteristics of fast speed, high precision, flexibility, real-time dynamic monitoring, and alarm funtion, which is important for the quality monitoring and problem analysis of the car body matching. References | Related Articles | Metrics

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Measurement Method of Car Body Matching Clearance Based on OpenCV LI Yongbo 2022, 47(16): 128-131.  DOI: 10.16638/j.cnki.1671-7988.2022.016.026 Abstract ( )   PDF (1352KB) ( )   This paper proposes a machine vision measurement scheme for vehicle body matching clearance based on OpenCV image processing technology. The software framework of the system is divided into core modules such as image preprocessing, edge detection and size measurement. The median filter is used to eliminate the noise in the image, the Canny algorithm is used to obtain the edge information of the clearance, and then the corresponding measurement algorithm is used to calculate the measurement results. Finally, the error analysis of the measurement results shows that the method has the advantages of high efficiency, high precision and flexibility, and has good practical application value. References | Related Articles | Metrics

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Design and Application of Double Gun Straight Seam Welding Device for Protective Beam of Commercial Vehicles LIU Jing 2022, 47(16): 132-135.  DOI: 10.16638/j.cnki.1671-7988.2022.016.027 Abstract ( )   PDF (1073KB) ( )   With the continuous development of welding technology, automatic welding process and equipment can improve welding efficiency, guarantee welding quality and effectively control arc welding deformation, especially in the long weld welding, the effect is particularly obvious, automation scheme is favored. In this paper, through the design of double gun straight seam welding device, can achieve a commercial vehicle protection beam workpiece two meters long intermittent welding weld one-time welding. The design and application of the device greatly improve the processing efficiency of the product, reduce the labor intensity of the processor, and ensure the welding consistency of the product. References | Related Articles | Metrics

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Commonly Used Sealing Technology and Verification Methods for Automobile Bodies CHEN Junqiao 2022, 47(16): 136-141.  DOI: 10.16638/j.cnki.1671-7988.2022.016.028 Abstract ( )   PDF (1892KB) ( )   In order to improve the NVH level of the car and improve the comfort of the air conditioner to ensure the driving comfort of the occupants, the body should be well sealed. From the point of view of the body subsystem that affects the airtightness of the whole vehicle, combined with the professional practical experience of the vehicle airtightness monitoring and propulsion solution in the new model project, the method of comparison is adopted, and the reasonable body hole structure plugging process and common verification methods in the whole vehicle design process are discussed. It has been proved by practice that the above structure, process and verification method can meet the requirements of body sealing. Through the verification of the design data in the early stage and the compliance inspection of the vehicle sealing performance in the trial production stage, combined with various test and testing schemes, the sealing performance target of the whole vehicle can be quickly achieved. References | Related Articles | Metrics

Automobile Education

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The Course Reform of Motor and Control System Maintenance Based on the Integration of Course, Certificate and Competition PENG Pengfeng 2022, 47(16): 142-145.  DOI: 10.16638/j.cnki.1671-7988.2022.016.029 Abstract ( )   PDF (1053KB) ( )   In order to improve the quality of classroom teaching and the quality of talent training of new energy vehicle technology, this paper explores and practices the teaching reform of the core professional course maintenance of motor and control system based on the integration of course, certificate and competition. First of all, this paper analyzes the current situation of the course, and analyzes the necessity of integrating the course with 1+X certificate and vocational skill competition, and then expounds the specific measures for the reform of teaching content, teaching objectives, teaching mode, examination methods and so on. The research of this paper can provide reference for the teaching reform of other courses. References | Related Articles | Metrics

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Development of Curriculum System of Automotive Manufacturing and Test Technology Specialty Based on Professional Standards LI Cheng 2022, 47(16): 146-151.  DOI: 10.16638/j.cnki.1671-7988.2022.016.030 Abstract ( )   PDF (1461KB) ( )   The professional course of automobile manufacturing and test technology is the foundation of automobile professional construction. This paper starts from the problems existed in the establishment of the professional curriculum system of automobile manufacturing and test techno- logy. The research significance of this professional curriculum system was analyzed in the context of the adjustment of the new professional catalog. The goal of building a curriculum system that takes into account the development of abilities of students and the development of the automotive manufacturing industry was proposed. The implementation path of three stages and three integrations with research as a means was formulated. Specific strategies for systematic design of curriculum systems and structured design of curriculum matrices were proposed. The goal of cultivating professional talents was achieved ultimately. References | Related Articles | Metrics

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Online Teaching of Automobile Construction Based on Superstar Learning and Tencent Classroom WANG Na 2022, 47(16): 152-156.  DOI: 10.16638/j.cnki.1671-7988.2022.016.031 Abstract ( )   PDF (1624KB) ( )   Taking the online teaching of automobile construction network in the school of mechanical engineering of Anhui Sanlian University as an example, this paper discusses the development methods of online teaching mode, including synchronous live broadcast based on Tencent classroom, asynchronous self-learning based on superstar learning, problem guidance in teaching, interactive connection by adding a variety of interactive ways, and thinking guidance in content carding. A good result is obtained. To provide reference for the implementation of stable, orderly and efficient online teaching mode. References | Related Articles | Metrics

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Ideological and Political Construction and Practice of Engine Principle for Engineering Education Certification YANG Honggang 2022, 47(16): 157-160.  DOI: 10.16638/j.cnki.1671-7988.2022.016.032 Abstract ( )   PDF (1091KB) ( )   Taking students as the center and cultivating social useful talents is the mission of higher education. This paper carries out the ideological and political construction and practice of engine principle, connecting the engineering education certification standards, formulates the curriculum objectives supporting the graduation requirements based on the concept of outcome based education (OBE), gathers the spiritual qualities and professional ethics such as patriotism, innovation and hard work and the pursuit of excellence, and combines the case design of ideological and political courses, integrates online and off line teaching and enterprise practice, optimizes the curriculum teaching system, improves the assessment and evaluation mechanism, in order to strengthen the cultivation of students' application ability and moral quality, promote continuous improvement, and improve the quality of professional talent cultivation. References | Related Articles | Metrics

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Research on Teaching Reform of Material Science Fundamental Experiments Oriented by Team Cooperation DONG Xiaoping 2022, 47(16): 161-164.  DOI: 10.16638/j.cnki.1671-7988.2022.016.033 Abstract ( )   PDF (1144KB) ( )   At present, under the guidance of professional engineering certification, the material science fundamental experiment course offered by mechanical majors is one of the key discipline core courses for cultivating mechanical engineering-related technical talents to form good practical and innovative abilities. In order to avoid the continuous extension of experimental problems and improve the comprehensive experimental quality of students, the authors combined with years of teaching implementation, summarized the problems existing in experimental teaching, and proposeda teamwork model for experimental teaching. From the design of experimental projects, selection of samples, the extraction of experimental theoretical knowledge, teamwork experiments, etc. explain the teaching reform of fundamental experiments in materials science, so that students not only obtain important experimental theoretical knowledge in the process of practice, but also improve the thinking of problems in the experimental process, analysis, solution ability, cultivate teamwork consciousness, realize the teaching method of "student-centered, teacher-led", so as to achieve the purpose of improving and optimizing the teaching effect of fundamental experiments of materials science. References | Related Articles | Metrics

Standards Regulations Management

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Construction and Practice of Digital Smart Factory for R&D Prototype Trial Production Trial Production WU Zhixuan 2022, 47(16): 165-169.  DOI: 10.16638/j.cnki.1671-7988.2022.016.034 Abstract ( )   PDF (3510KB) ( )   In the digital construction process of automobile manufacturing, different from the assembly line production method of automobile mass production, the trial production of new model prototypes is basically personalized production, and the status of prototype parts in the research and development process is immature. Production efficiency is much lower than mass production. The improvement of prototype production capacity has always been a bottleneck, and the improvement of production capacity of prototype vehicles through management or information technology is very limited. However, through the construction of a digital platform for trial production projects, digital measures such as business digitization, interconnection, mobile online, timely material supply, rapid quality processing, and real-time decision-making have been adopted, and significant results have been achieved by digitalization to break through the capacity bottleneck of personalized production, the prototype production capacity has been improved. References | Related Articles | Metrics

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Risk Identification and Disposal Countermeasures for Power Battery Recycling Enterprises ZHOU Huihui 2022, 47(16): 170-173.  DOI: 10.16638/j.cnki.1671-7988.2022.016.035 Abstract ( )   PDF (1027KB) ( )   In recent years, the consumption of lithium batteries in the field of power energy has led to a sharp increase in its consumption, which is bound to lead to the generation of more and more retired power batteries. At the same time, the safety risks in the recycling process of a large number of used power batteries have gradually become prominent. Therefore, the article analyzes the potential danger in the process of power battery recycling from the material, recycling process and environmental pollution. The specific disposal measures of fire accidents in power battery recycling enterprises were elaborated systematically, which provided a certain reference basis for the grass-roots officers and men to put out such new type of fire. References | Related Articles | Metrics

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Analysis of Constraints on the Construction of Underground Vehicle Inspection Station LIU Ling 2022, 47(16): 174-178.  DOI: 10.16638/j.cnki.1671-7988.2022.016.036 Abstract ( )   PDF (1245KB) ( )   With the continuous promotion of urbanization and the agglomeration effect of central cities, the demand for land in the construction of regional central cities is more and more vigorous, and urban land resources are more scarce. This paper discusses the necessity and feasibility of the construction of underground automobile inspection stations by consulting the relevant literature of automobile inspection and combining with the current development status of automobile inspection stations. The construction of underground vehicle inspection station is mainly restricted by three factors: vehicles, site and fire safety. First of all, the underground vehicle inspection station is more suitable for single fuel light passenger vehicles with a service life of less than 10 years. Taking it as the main service object can greatly reduce the construction cost of the site. Secondly, the construction of the site should focus on lighting and ventilation, which is very important for the operation of the detection station and the health of the staff. Finally, Setting indoor fire separation belts, adding ventilation facilities and more convenient personnel evacuation are effective measuresto prevent and reduce fire accidents. References | Related Articles | Metrics

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Analysis on the Protection of Consumers' Rights and Interests under the Flooded Car ZHANG Shulin 2022, 47(16): 179-182.  DOI: 10.16638/j.cnki.1671-7988.2022.016.037 Abstract ( )   PDF (1008KB) ( )   Recent years, with the rapid growth of car ownership in my country, on the one hand, the used car market is booming, on the other hand, consumers are easily induced or deceived into passively buying " flooded cars" when buying used cars, lead to damage to the legitimate rights and interests of consumers. In order to reduce and avoid the above phenomena, this article analyzes the damage to the rights and interests of customers who mislead and passively purchase " flooded cars", it is proposed to strengthen the identification and evaluation system of flooded vehicles, actively establish a third-party information inquiry website for flooded vehicles, regulate the intermediary behavior of flooded car brokerage companies, reduce the cost of consumer rights protection and expand the channels for rights relief, summarized and concluded the practical methods to protect the rights and interests of consumers when purchasing flooded vehicles. In the actual used car market verification, it can allow consumers to identify " flooded cars" through the above methods, protect their legal rights, it also shows that the method proposed in this paper is active and effective. References | Related Articles | Metrics

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Analysis on the Type Approval of Chinese Automobiles Exported to Europe WANG Min 2022, 47(16): 183-187.  DOI: 10.16638/j.cnki.1671-7988.2022.016.038 Abstract ( )   PDF (1336KB) ( )   With the deepening of China's opening to the outside world and the acceleration of the globalization of the world economy, the level of China's automobile industry has also advanced by leaps and bounds. Automobile manufacturers have gone abroad to explore the international market. The number of automobile exports has increased rapidly, and the problems faced by automobile exports have gradually become prominent. The first one is the certification link. Due to the long export certification period, high cost, large differences in the certification systems and regulations and standards implemented by various countries, and continuous updating and upgrading, it has brought obstacles and challenges to our country's automobile export. This paper mainly discusses the European automobile type approval system, certification system and automobile safety technology evaluation, analyzes the problems existing in our country's automobile export certification based on the actual situation, and proposes solutions, which will have certain guiding significance for our country's future automobile export certification work. References | Related Articles | Metrics

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Research and Implementation of Online Repair Strategy Reorganization for Automobile Assembly Line TAN Jiasheng 2022, 47(16): 188-192.  DOI: 10.16638/j.cnki.1671-7988.2022.016.039 Abstract ( )   PDF (1339KB) ( )   With the increasing of automobile users in our country, the market consumption is increasingly diversified and personalized, and the customer requirements for product quality are higher and higher. Manufacturing enterprises take improving product quality as an important business policy. In general production and assembly lines, employees usually carry out operating standards within standard working hours, but in the repair process, they should not only carry out operating standards, but also repair within the specified time, which requires personnel with high technical level. Through a company assembly line body is analyzed, the existing online repair scheme of anomalies corresponding problems such as slow, repetitive confirmed that causes loss of working hours, by simulating human validation method, simple import limit function of PLC and making blowout preventer, multiple assembly parts to help repair personnel for the first time clearly identify unusual points, in ensuring quality at the same time also can give repair personnel burden. References | Related Articles | Metrics

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Matching Application of Expansion Tank of Commercial Vehicle and Analysis of Water Return Fault ZHANG Zongying 2022, 47(16): 193-196.  DOI: 10.16638/j.cnki.1671-7988.2022.016.040 Abstract ( )   PDF (1749KB) ( )   The expansion water tank is an important part of the cooling system of commercial vehicles. This paper discusses the basic knowledge and specific functions of the expansion water tank, and puts forward the matters needing attention in the matching and application of the expansion water tank in commercial vehicles. Through the introduction of market failure cases, the main causes of vehicle water return failure are analyzed and discussed, providing guidance for cooling system failure solution. References | Related Articles | Metrics