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15 May 2022, Volume 47 Issue 9 Previous Issue   
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Intelligent Connected Vehicle
New Energy Vehicle
Testing and Experiment
Process and Equipment
Automobile Education
Standards Regulations Management
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Intelligent Connected Vehicle

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The Traffic Sign Recognition Based on Bidirectional Feature Fusion TANG Lei 2022, 47(9): 1-3.  DOI: 10.16638/j.cnki.1671-7988.2022.009.001 Abstract ( )   PDF (2606KB) ( )   In order to further improve the detection accuracy of traffic sign identification, this paper proposes an improved YOLO deep learning network, which adopts bidirectional feature fusion network, introduces fewer parameters to realize more feature fusion, and calculates target boxes based on Chinese traffic sign data set. Compared with the benchmark network, the results show that the detection performance of the deep learning network is better, which verifies the effectiveness of the improved network. References | Related Articles | Metrics

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Automatic Test Method of SAE J1939 Network for a Commercial Vehicle Based on CANoe BAI Ling 2022, 47(9): 4-8.  DOI: 10.16638/j.cnki.1671-7988.2022.009.002 Abstract ( )   PDF (1180KB) ( )   With the development of automotive electronic technology and the improvement of vehicle performance requirements, the number of vehicle electronic control units is increasing, and the interactive information between each electronic control unit, intelligent sensor and intelligent actuator is becoming more and more complex. Network communication has become the basic technology to ensure the normal operation of each node. Based on the development and verification of commercial vehicle controller area network, this paper introduces the test process and test method of commercial vehicle controller area network automatic test. Based on this process and method, by analyzing its test requirements, the test cases are compiled, and the automatic test process is formed. The controller area bus network automatic test of each electronic control unit node of a commercial vehicle is realized. The automatic test system ensures the efficiency and accuracy of the test, and improves the efficiency and reliability of the whole model project. References | Related Articles | Metrics

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Test Evaluation and Problem Analysis for Intelligent Connected Vehicles LI Guoyong 2022, 47(9): 9-13.  DOI: 10.16638/j.cnki.1671-7988.2022.009.003 Abstract ( )   PDF (517KB) ( )   As an indispensable part of the safety of test evaluation on the road, test evaluation is an important guarantee for the smooth landing of the intelligent connected vehicle industry. Compared with traditional vehicles, the system of intelligent connected vehicle is more complex, and the test scenarios are more diverse, which brings more difficulty to the test evaluation. This paper aims to analyze the technical path and existing problems of test evaluation for intelligent connected vehicle. First, the current status of testing and development of test evaluation for intelligent connected vehicle is briefly introduced. Second, two main test technology paths of intelligent connected vehicle are clarified: road test and simulation test. Then, from the aspects of evaluation methods and indicators, the main existing test evaluation norms and standards are studied, and the related problems of test standards are pointed out. Finally, the basic situation of road test and simulation test is discussed, and the existing problems of the two test methods are deeply analyzed, which has certain guiding significance for the test evaluation of intelligent connected vehicle. References | Related Articles | Metrics

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The Vehicle Micro Dynamic Rolling Trajectory Planning under Multi-condition Constraints WANG Xueying 2022, 47(9): 14-23.  DOI: 10.16638/j.cnki.1671-7988.2022.009.004 Abstract ( )   PDF (2051KB) ( )   Aiming at the problem of generating optimal vehicle trajectory in highly complicated unknown motion environment, a microdynamic rolling trajectory planning method based on multicondition constraints was proposed on the basis of considering road shape, road adhesion coefficient, road width, obstacles, vehicle size and driving style, etc in this paper. Aiming at the shortest distance, the path planning of obstacle avoidance and collision avoidance was carried out for the curve based on polynomial. Drivers with different driving styles were defined by the preview distance and the maximum lateral acceleration as optimization constraints, and the driving trajectory decisions of different drivers were analyzed.Considering the planning habits of real drivers, the planning range is updated according to the current position of the vehicle and the pre-view range, and the trajectory is determined by rolling optimization. Finally, simulation experiments are carried out using Simulink simulation platform to verify the effectiveness of the proposed method in this paper. References | Related Articles | Metrics

New Energy Vehicle

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Research on Talent Training Mode of Vehicle Engineering and New Energy Vehicle with Deep Integration of Industry and Education —Take Qingdao Huanghai University as an Example HU Xuefang 2022, 47(9): 24-27.  DOI: 10.16638/j.cnki.1671-7988.2022.009.005 Abstract ( )   PDF (551KB) ( )   The cultivation of skilled talents is inseparable from the exercise of social practice. The implementation of industry education integration through school enterprise cooperation is an important way to cultivate applied talents. This paper analyzes the connotation of the educational mechanism of deep integration of industry and education, and the current situation of talent training in the direction of new energy vehicles in vehicle engineering, taking Qingdao Huanghai University as an example, puts forward the reform measures of vehicle engineering new energy vehicle talent training with deep integration of industry and education from the aspects of the formulation of talent training plan, the construction of curriculum system, the reform of teaching mode and the construction of double qualified teachers, in order to provide reference for the talent training of vehicle engineering new energy vehicle under the background of industry and education integration,cultivate new energy vehicle talents recognized by the society and needed by enterprises. References | Related Articles | Metrics

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Sales Forecast of Pure Electric Vehicles in China Based on Grey Model CHENG Xiaoli 2022, 47(9): 28-31.  DOI: 10.16638/j.cnki.1671-7988.2022.009.006 Abstract ( )   PDF (817KB) ( )   Electric drive has become one of the important trends in the future transformation and development of the automobile industry, and the sales volume of pure electric new energy vehicles in China is growing rapidly. This paper takes the sales volume of pure electric vehicles in China from 2016 to 2020 as the original data, and forecasts the sales volume of pure electric vehicles in China from 2021 to 2025 by constructing the grey prediction model GM(1,1). It is found that the sales of pure electric vehicles in China will continue to rise from 2021 to 2015, and the sales of pure electric vehicles in 2025 will reach 2.308 million. The gray prediction model can accurately predict the development trend of pure electric vehicles in China, and can provide a certain reference for the government to formulate subsidy policies, promote pure electric vehicles, and enterprises' research and development, production and sales. References | Related Articles | Metrics

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Design of a Power Battery Temperature Monitoring System Based on Optical Fiber Temperature Measurement FENG Ziliang 2022, 47(9): 32-37.  DOI: 10.16638/j.cnki.1671-7988.2022.009.007 Abstract ( )   PDF (1479KB) ( )   In order to verify the feasibility that the principle of optical fiber temperature measurement can be used for temperature detection of new energy vehicle power battery, this article first analyzes the principle of distributed optical fiber temperature measurement, and then designs a distributed optical fiber power battery temperature measurement system with AT89S52 as the core, which is composed of main control chip, analog-to-digital conversion module, temperature display and alarm module, pulse width modulation module, power supply module, semiconductor laser and sensing fiber. After calculation, the pulse width and spatial resolution meet the measurement requirements. Finally, the expected effect has been achieved by compiling the corresponding program, building the simulation environment, and performing simulation tests on functions such as real-time temperature display, sound and light alarm, pulse width modulation, etc. The success-ful application of optical fiber temperature measurement technology in power battery temperature monitoring can achieve earlier and more accurately positioning the fault location to a certain extent, so as to reduce potential safety hazards. References | Related Articles | Metrics

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Development and Design of Commercial Vehicle Full Liquid Crystal Instrument Based on Linux LI Shuhao 2022, 47(9): 38-41.  DOI: 10.16638/j.cnki.1671-7988.2022.009.008 Abstract ( )   PDF (952KB) ( )   With the continuous development of vehicle intelligence and networking, instrument as the most important display and interaction platform for the commercial vehicles, the demand for the human-computer interaction experience and personalized display is becoming more and more urgent. Therefore, more modern and intelligent full liquid crystal display(LCD) instrument have been widely used as the development direction of commercial vehicle instruments in the future. Based on the NXP IMX6-ULL core board, CANalyst-II analyzer, Linux operating system, QT-Creater software, etc., after system transplantation and program design, this paper proposes a set of commercial vehicle full LCD instrument development and design solutions. This solution is easy to maintain and upgrade the system, enhance the sense of space technology and grade of the vehicle, and can better improve the user's personalization and interactive experience. References | Related Articles | Metrics

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Research on Lightweight Design of a Heavy Truck Frame ZHANG Xiao 2022, 47(9): 42-46.  DOI: 10.16638/j.cnki.1671-7988.2022.009.009 Abstract ( )   PDF (2435KB) ( )   The frame is the frame of a heavy truck, which holds the engine, cab, transmission, steering, and loads. In the process of vehicle running, it not only bears the mass load of fixed parts, but also bears the impact, torsion, bending and braking loads caused by rough road surface and various complicated working conditions. The lack of frame stiffness and strength may cause serious problems such as the distortion and cracking of crossbeam and longitudinal beam, the decrease of frame reliability, the distortion of cab and the cracking of front windshield. In this paper, the solid model of the frame is built by CATIA, and the frame model is simplified by HyperWorks, the grid is divided, the stress concentration area is laid out and the boundary condition is simulated. According to the actual operating conditions of the vehicle, the stiffness and strength are analyzed, through the application of high-strength steel, high-strength ductile iron and aluminum alloy materials, its rigidity and strength can be guaranteed, at the same time, the weight can be reduced by 30% , and the transportation efficiency can be improved, lower transport costs, the frame has been place on the market in small quantities. References | Related Articles | Metrics

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Design of an Intelligent Engine Bench Monitoring System BAI Fengyue 2022, 47(9): 47-49.  DOI: 10.16638/j.cnki.1671-7988.2022.009.010 Abstract ( )   PDF (823KB) ( )   In order to establish the centralized monitoring capability of the intelligent engine bench, this article introduced the communication protocols such as the remote terminal unit and the user datagram protocol, and discussed and analyzed the advantages and disadvantages of various communication protocols. Based on the signal types in the engine bench, a centralized monitoring system with transmission control protocol/internet protocol as the unified interface was designed. The system transmited the network camera, bench temperature and pressure and other sensor signals and the information of the bench auxiliary equipment to the centralized monitoring system, realized the efficient and stable data transmission of the engine bench centralized monitoring system, and provided guidance for a smart laboratory and centralized monitoring system. etc. References | Related Articles | Metrics

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Construction and Test Design of a Vehicle Spoiler YANG Jie 2022, 47(9): 50-54.  DOI: 10.16638/j.cnki.1671-7988.2022.009.011 Abstract ( )   PDF (2460KB) ( )   Based on the aerodynamics optimization request of a vehicle, this paper raised a new design for spoiler around the front wheel area. A related construction design scheme and material seletion was provided, which can further reduce the vehicle wind drag and improve the driving mileage. Through the analysis of the actual working conditions, a single bench test method is designed to guide the structural optimization and process improvement of parts, which provided a guidance to structure and process optimization. Through the comparison between test rig and vehicle test, this test method using single part was verified, which can shorten the development cycle and reduce the cost. The new spoiler construction and test design could provide a reference for the vehicle aerodynamics optimization. References | Related Articles | Metrics

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Analysis of the Structural Strength and Stiffness of the All-terrain Off-road Vehicle Frame LI Qianqian 2022, 47(9): 55-61.  DOI: 10.16638/j.cnki.1671-7988.2022.009.012 Abstract ( )   PDF (1409KB) ( )   This paper mainly studies the strength and stiffness of the frame structure of the all terrain off-road vehicle. Taking the all terrain off-road vehicle as the research object, the geometric model of the frame is established by using SolidWorks software, the matching frame materials and welding methods are selected, and the geometric model processing, mesh generation and load optimization are carried out on the frame by using ANSYS finite element analysis software. The strength analysis and stiffness analysis of the frame under four different working conditions such as bending, torsion, braking and turning are carried out under the full load state, so as to ensure the stability and safety of the frame structure, provide a basis for the subsequent design and improvement of the frame, and provide a certain reference for the subsequent research and development of all terrain off-road vehicle. References | Related Articles | Metrics

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Asymmetric Twin-scroll Turbocharger Balance Valve Shaft Wear Analysis and Improvement Based on Fretting Wear Theory MA Xianlong 2022, 47(9): 62-66.  DOI: 10.16638/j.cnki.1671-7988.2022.009.013 Abstract ( )   PDF (1411KB) ( )   Aiming at the large wear problem happened on the balance valve shaft of the asymmetric twin-scroll turbocharger in an engine endurance test, this paper analyzed the key factor of the wear based on fretting wear model, proposed the number of load cycles is represented by the number of displacement cycles of balance valve shaft sliding back and forth. The results show that the large and frequent reciprocating sliding displacement of the balance valve shaft is the main reason for the wear. The improved solution eliminates the large displacement fluctuation of balance valve shaft, and the durability experiment verifies that the improved solution has low wear of the balance valve shaft. References | Related Articles | Metrics

Testing and Experiment

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Influence of Mixed Hydrogen on Laminar Combustion Characteristics with Dimethyl Ether WANG Xin 2022, 47(9): 67-69.  DOI: 10.16638/j.cnki.1671-7988.2022.009.014 Abstract ( )   PDF (906KB) ( )   With the increasing severity of environmental pollution and the increasing energy crisis, the search for clean and renewable alternative fuels has become a research hotspot, and dimethyl ether and hydrogen have received extensive attention as alternative fuels with excellent performance. The laminar combustion characteristics of dimethyl ether-hydrogen-air premixed gas were numerically simulated by CHEMKIN Ⅱ, and the effects of hydrogen mixing on adiabatic flame temperature and laminar combustion rate of dimethyl ether-hydrogen-air premixed gas were analyzed. The results show that the adiabatic flame temperature and laminar combustion velocity of the mixture increase with the increase of the hydrogen mixing ratio in the mixture.With the increase of the equivalence ratio, the laminar combustion velocity and adiabatic flame temperature of the mixture increase first. The equivalence ratio corresponding to the adiabatic flame temperature and the maximum laminar combustion velocity increases gradually. References | Related Articles | Metrics

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EASY-EV General Chassis Modal Test WANG Le 2022, 47(9): 70-73.  DOI: 10.16638/j.cnki.1671-7988.2022.009.015 Abstract ( )   PDF (2218KB) ( )   The chassis is an important bearing part of the automobile engine and the components and assembly, and accepts the power of the engine to make the car move and ensure the normal running. Its natural frequency and mode shape are the important guarantee of the safe operation of the whole vehicle. In order to test the first ten order modal frequencies, the first order torsion frequency and the first order bending modal frequencies of the EASY-EV universal chassis, the modal test scheme design, modal test, modal fitting and modal verification of the universal chassis modal test were carried out in this paper. The test results show that the first-order mode of EASY-EV universal chassis is the first-order bending mode of the whole vehicle, the modal frequency is 26.7 Hz, the damping is 4.32%, and the vibration mode is bending in the XZ plane, the first-order torsional modal frequency of EASY-EV universal chassis is 35.6 Hz, the damping is 2.85%, it rotates around the X-axis, and the rear deformation is large. References | Related Articles | Metrics

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Analysis of the Causes and Solutions of Steering Wheel Shaking after the Air Conditioning of Passenger Cars Turned on LIU Hualin 2022, 47(9): 74-78.  DOI: 10.16638/j.cnki.1671-7988.2022.009.016 Abstract ( )   PDF (1397KB) ( )   Steering wheel shaking after turning on the air conditioner in passenger cars is a common low-frequency shaking problem in vehicle development. This paper focuses on the problem that when a passenger car is turned on with air conditioning, the cooling fan, compressor, and blower run simultaneously with the engine to stimulate, thus increasing steering wheel shake and bringing uncomfortable feelings to the driver, and even further triggering driver complaints and claims, focusing on analyzing the causes of the problem and developing corresponding solutions. The research results show that redefining the left and right fan speeds, optimizing the instrument crossmember and right suspension structure, and redefining the engine speed when the air conditioner is on can effectively solve such problems. References | Related Articles | Metrics

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Finite Element Analysis of Wheel Center Stiffness of a Rear Twist Beam QIU Mingmin 2022, 47(9): 79-83.  DOI: 10.16638/j.cnki.1671-7988.2022.009.017 Abstract ( )   PDF (1854KB) ( )   In order to efficiently analyze and evaluate the wheel center stiffness of the rear twist beam, based on the finite element model of the rear twist beam, this paper analyzes the wheel center stiffness of the rear twist beam in the vehicle coordinate system and the local coordinate system respectively. With the same structure but different installation points of the rear twist beam to body connecting bushing, the simulation analysis results of the wheel center stiffness in vehicle coordinate system are tremendously different. Through the comparison of simulation data, it can be determined that the wheel center stiffness of the rear twist beam can be more accurately analyzed in the local coordinate system, which is great significance for the simulation analysis and evaluation for the wheel center stiffness of the rear twist beam. References | Related Articles | Metrics

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Analysis and Processing of "Ghost Signal" in AVP System YANG Hongming 2022, 47(9): 84-87.  DOI: 10.16638/j.cnki.1671-7988.2022.009.018 Abstract ( )   PDF (1238KB) ( )   The loop error "disabled" situation had occurred in the beginning of the operation of the only Personal Rapid Transit (PRT) system in the world--the PRT personal rapid transit system at Heathrow Airport. This paper analysis and process this issue including the cause of the error signal, theoretical analysis, put forward a solution and test verification. Through a lot of exploration and research, the implementation plan of avoiding "ghost signal" in engineering project is determined. References | Related Articles | Metrics

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Test Method of Main Leaf Center Trajectory LIU Baofeng 2022, 47(9): 88-91.  DOI: 10.16638/j.cnki.1671-7988.2022.009.019 Abstract ( )   PDF (1341KB) ( )   In this paper, the test method of main leaf center trajectory of a commercial vehicle is researched, and a clear bench test plan is proposed, and the bench structure, data acquisition process, and data processing method are introduced with emphasis. Through actual test and test data analysis of three tractor leaf springs, the validity of this test scheme is verified. This method can accurately obtain the trajectory center coordinates and trajectory radius of the main leaf of the leaf spring, which can provide important data basis for the designers to perform theoretical calculations and simulation analysis. References | Related Articles | Metrics

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Analysis of Influence of Clutch Characteristics on Vehicle Resonance HU Junsheng 2022, 47(9): 92-95.  DOI: 10.16638/j.cnki.1671-7988.2022.009.020 Abstract ( )   PDF (2186KB) ( )   In order to solve the resonance problem of a vehicle, through the analysis of the noise, vibration and key point vibration of the vehicle, it is analyzed that the main cause of the problem is the knock of the gearbox caused by the torsional vibration of the engine. In order to further clarify the influence of various components of the power system, the cross interchangeability test is designed, the main influencing component is found to be the clutch, and the characteristics of the clutch are tested and analyzed.It is clearly caused by the difference of clutch damping parameters, so as to optimize the clutch stiffness and damping and solve the problem of vehicle resonance. References | Related Articles | Metrics

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Mountain Path Test of Vehicle Braking Performance Based on Chinese Customer Conditions XIE Jiecong 2022, 47(9): 96-100.  DOI: 10.16638/j.cnki.1671-7988.2022.009.021 Abstract ( )   PDF (1164KB) ( )   European and American automobile companies conduct vehicle braking performance tests in the Great Glockner Mountain in Austria under simulated user driving conditions. Japanese auto companies also have corresponding test roads to develop and verify braking performance by simulating driving conditions of users on actual roads. In China, there is no unified test method for braking performance test on mountain road. In this paper, based on the domestic actual road, combining with the Austrian Great Glockner test method and user condition, and referring to the summary of braking deceleration, braking load coefficient, braking frequency in the research on braking of passenger vehicles in China by China Automotive Technology and Research Center. It is of great practical significance to collect and verify the vehicle test data, so as to explore a kind of test method of braking performance in mountain road which is suitable for Chinese users. References | Related Articles | Metrics

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The Factors of a Wheel Dynamic Balance Test Result ZHAO Xingchen 2022, 47(9): 101-105.  DOI: 10.16638/j.cnki.1671-7988.2022.009.022 Abstract ( )   PDF (1249KB) ( )   People’s requirement of driving feeling is increasing as the vehicle performance improved nowadays. The accuracy of wheel dynamic balance correction is much more strict. This paper is discussing how to get more accurate wheel dynamic balance test and correction result during the production process. This research get some factors which may influence the dynamic balance result by disusing the testing method and calculation formula. By exploring how these factors are influenced and how they can be controlled, a method for achieving more accurate dynamic balance measurements and optimal dynamic balance corrections in production practice can be developed. The methods include conformation of wheel quality, match between rim and tire, maintenance of equipment, and dynamic block assembly. At last we provide some recommendations for wheel production process optimization. References | Related Articles | Metrics

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Power System Parameter Matching and Performance Simulation of Medium LNG Transporter QI Xiaoliang 2022, 47(9): 106-110.  DOI: 10.16638/j.cnki.1671-7988.2022.009.023 Abstract ( )   PDF (1528KB) ( )   As a clean energy, liquefied natural gas plays an important role in adjusting the energy structure and building a clean, low-carbon and efficient energy system. Based on Cruise software, the gas-powered simulation model of 4×2 liquefied natural gas carrier is established by selecting appropriate parameters of powertrain, gas supply system and transmission system, to analyze the dynamic economy of liquefied natural gas transporter, which provides an important basis for the design and development of liquefied natural gas products in this paper. References | Related Articles | Metrics

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Application of Orthogonal Test Method to Prediction Model of Refueling Premature Shut-off SONG Liting 2022, 47(9): 111-115.  DOI: 10.16638/j.cnki.1671-7988.2022.009.024 Abstract ( )   PDF (1340KB) ( )   Due to the introduction of the on-board refueling vapor recovery system in the national VI emission standard fuel system of the automobile, the back pressure increases during refueling, and the risk of jumping the gun in advance increases. The four parameter levels of turning radius, horizontal section length and vertical height of refueling tube are taken as the research object in this paper, based on orthogonal test method, 16 kinds of refueling tube schemes are designed and performance tests are carried out to obtain the highest refueling rate under different combination schemes. The prediction model of gun jump ahead of refueling was established by nonlinear multiple regression method and verified by experiment. The sensitivity analysis had been conducted and the key influencing factors affecting the refuelling performance had been obtained. The analysis results showed that the vertical section height of filler pipe had the greatest impact on the risk of premature fuel nozzle shut-off. The preferred turning radius, horizontal section length and vertical section height of the filler pipe are 100 mm, 362 mm and 644 mm respectively. References | Related Articles | Metrics

Process and Equipment

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Crack Corrosion Behaviors of Automotive General Metal Materials in Neutral Salt Spray Environment CHEN Wei 2022, 47(9): 116-120.  DOI: 10.16638/j.cnki.1671-7988.2022.009.025 Abstract ( )   PDF (3347KB) ( )   The corrosion behaviors of cold rolled sheet, galvanized sheet, aluminum sheet and their electrophoretic crevices in the neutral salt fog environment were studied, their macroscopic corrosion morphology was analyzed, and the corrosion morphology and composition were characterized by scanning electron microscope, energy disperse spectroscopy and other microscopic analysis methods. The results show that in the same corrosion environment, the crevices of the above universal metal materials are more prone to corrosion, especially the crevices of the cold rolled plate are the most serious, which produce a large amount of Fe3O4 and Fe2O3, showing poor corrosion resistance. The oxygen content of the crevice corrosive surface of galvanized sheet is higher, and more Fe2O3 is produced, while the oxygen content of the crevice corrosive surface of aluminum plate is the lowest, and a small amount of Al2O3 is produced, showing good corrosion resistance. The corrosion resistance of the crevice of the electrophoretic material was improved obviously. Finally, according to the technical requirements of automobile structure and the corrosion status of the above-mentioned metal crevices, the recommended conclusions for selecting crevice materials in automobile body, engine compartment, chassis and other areas are given. References | Related Articles | Metrics

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Design of Eight Function Test Fixture for Internal Spline CVJ-side Driveshaft MA Zhijian 2022, 47(9): 121-124.  DOI: 10.16638/j.cnki.1671-7988.2022.009.026 Abstract ( )   PDF (1753KB) ( )   The paper introduces the working principle of the eight function test of the equal speed drive shaft, and improves the fixture for a certain internal spline equal speed drive shaft when doing the eight function test, such as easy damage to the outer circle of the mobile knuckle fork and poor clamping, focusing on the design principle, clamping specific, connecting flange, quick disassembly and other aspects of the design of the new fixture to better solve the problems that occur in the clamping of the internal spline equal speed drive shaft, and finally achieves the purpose to improve the testing accuracy and efficiency as well as to obtain higher economic benefits. References | Related Articles | Metrics

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Research on the Mechanism of Prickly Heat Problem of Spraying Products LI Xin 2022, 47(9): 125-128.  DOI: 10.16638/j.cnki.1671-7988.2022.009.027 Abstract ( )   PDF (2452KB) ( )   With the development of the industry, the exquisite perception of the whole product of customers is getting higher and higher, which puts forward higher requirements for the spraying industry. In the process of spraying, due to the influence of technology and paint, "Prickly Heat" will appear on the spraying surface, which will affect the spraying quality of products and cause customers' complaints.In this paper, the problem of "prickly heat" in the spraying process was studied from the aspects of paint leveling and spraying atomization effect. Based on the mechanism of "prickly heat" problem, this paper makes a systematic analysis of "prickly heat" problem. It can be used for reference to the development and design of product spraying program and the requirements of subsequent spraying specifications. References | Related Articles | Metrics

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Applications of Thermal Spray Technology to Automobile Parts and its Processing Method ZHANG Yukun 2022, 47(9): 129-132.  DOI: 10.16638/j.cnki.1671-7988.2022.009.028 Abstract ( )   PDF (964KB) ( )   As a new type of surface processing technology, thermal spray technology has gradually attracted people’s attention in the field of automobile parts. Two kinds of common thermal spray technology, high velocity air fuel and plasma spray, which are applicable to automobile parts were summarized. Thermal spray principles, processes, characteristics were described briefly in the review. Moreover, the influencing factors of each thermal spray technology were discussed, also took stock of the shortcomings of the existing work, providing reference for the process optimization and daily process management of thermal spray technology in the automobile industry. References | Related Articles | Metrics

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Technical Scheme Analysis of Aluminum Wires for Automobile ZHANG Zhonggang 2022, 47(9): 133-137.  DOI: 10.16638/j.cnki.1671-7988.2022.009.029 Abstract ( )   PDF (2284KB) ( )   In this paper, the possibility of using aluminum wire to replace copper wire is discussed. A new type of positive wire for automobile battery is produced by pressing aluminum conductor with aluminum cylinder and connecting copper terminal with friction welding. After passing metallographic analysis, bench test and vehicle reliability test, no obvious problems were found. The cost and weight of the new wire harness are about 30% lower than that of copper wire with the same parameter requirements, showing a good application prospect. References | Related Articles | Metrics

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The Causes and Solutions of Body Water Leakage YANG Jiankang 2022, 47(9): 138-141.  DOI: 10.16638/j.cnki.1671-7988.2022.009.030 Abstract ( )   PDF (1918KB) ( )   Based on the problem of body leakage in the process of rain test of a trial production model, combined with the actual operation on site, this paper systematically analyzes and verifies the welding process, coating process, final assembly process and rain equipment, and finds out the improvement scheme of body leakage, which has achieved good results in practical application and effectively improved the product quality and customer satisfaction. It has certain reference and guiding significance for the follow-up body leakage prevention measures of newly developed models. References | Related Articles | Metrics

Automobile Education

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Exploring the Path of Mercedes Benz Electrical System Course Ideological and Political Construction under the Mode of School Enterprise Collaborative Education SUN Huan 2022, 47(9): 142-145.  DOI: 10.16638/j.cnki.1671-7988.2022.009.031 Abstract ( )   PDF (1151KB) ( )   In order to solve the problems of complex and diversified subjects of school enterprise collaborative education, uneven teaching effects and unequal students' recognition and sense of acquisition, based on the school enterprise cooperation and work study combination project, fully tap the moral education resources of both schools and enterprises, jointly build students' professional quality standards, and carry out the goal and path planning of curriculum ideological and political construction under the mode of school enterprise collaborative education. Taking the order class of Daimler Zhuxing education project Mercedes Benz electrical system as an example, this paper fully excavates the advantageous resources of school enterprise cooperation and reasonably integrates them into the daily teaching process, so as to carry out vocational quality education and professional skill training. At the same time, consolidate the teaching team and practice base, and comprehensively promote the teaching reform of curriculum ideological and political education, in order to provide theoretical and practical basis for higher vocational students' education and social development. References | Related Articles | Metrics

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Development and Design of a Loose-leaf Textbook Based on "1+X" Certificates — Take Auto Insurance and Claims Course as an Example GUO Jie 2022, 47(9): 146-149.  DOI: 10.16638/j.cnki.1671-7988.2022.009.032 Abstract ( )   PDF (1244KB) ( )   The new loose-leaf textbook under the "1+X" certificate system is the need of teaching reform in higher vocational colleges. The compilation of teaching materials should meet the skill points required by the examination module of vocational skill level certificate in "1+X" certificates, and the relevant requirements of the development and construction of loose-leaf teaching materials in the reform of "three education", break through the traditional teaching materials mode, and design loose-leaf teaching materials suitable for the integration of course and certificate. Under the background of "1+X" certificate system and the writing of loose-leaf teaching materials, this paper takes the course of auto insurance and claims as an example to complete the development and design of loose-leaf teaching materials integrated with course certificate, providing useful reference for the development of higher vocational teaching materials under the "1+X" certificate system. References | Related Articles | Metrics

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Exploration on the Training Mode of Production Education Integration of New Engineering Vehicle Engineering Specialty Based on OBE CHEN Zhiyong 2022, 47(9): 150-153.  DOI: 10.16638/j.cnki.1671-7988.2022.009.033 Abstract ( )   PDF (1170KB) ( )   With the rapid development and upgrading of the automobile industry, the quality requirements of vehicle engineering professionals also change, which puts forward new challenges to the training of vehicle engineering professionals in colleges and universities. Colleges and universities need to be guided by talent demand and follow the development of the times. Based on the OBE concept, this paper analyzes the production education integration teaching mode of vehicle engineering specialty from the aspects of personnel training mechanism, teaching staff and curriculum system construction, in order to improve the ability of professional talents to solve practical engineering problems, so as to facilitate the local ordinary universities to serve the local economy well. References | Related Articles | Metrics

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Exploration and Practice of the Teaching Mode of Integrated in Automobile Electrical Equipment Structure and Maintenance MING Jianping 2022, 47(9): 154-158.  DOI: 10.16638/j.cnki.1671-7988.2022.009.034 Abstract ( )   PDF (1204KB) ( )   In order to solve the course content and post content mismatch, course content and certificate content not financing, course teaching process and certificate examination process a synchronization etc. teaching problems, this paper uses multiple measures and builds "double" type teaching team, broken integration reconstruction teaching methods, such as the in automobile electrical equipment structure and maintenance teaching mode of explores and practize, 96.3% students passed the 1+X vocational skill level certificate examina-tion, for new energy automobile technology other professional curriculum certificate financing teaching experience. References | Related Articles | Metrics

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Innovative Reform and Practice in Classroom Teaching of Automobile Theory ZHANG Kun 2022, 47(9): 159-163.  DOI: 10.16638/j.cnki.1671-7988.2022.009.035 Abstract ( )   PDF (2388KB) ( )   As a core curriculum of vehicle engineering, the content of automobile theory is very abstract and complex. It is not easy for students to get learning outcomes. So it also has the question of “not easy to learn, don't like learning” for students. In order to improve the teaching quality and learning effect of automobile theory, directed against the current problems, the course team has fully summarized the learning situation and curriculum analysis. The course team insist on the educational concept of "student-centered, outcome oriented and continuous improvement". The course team carried out innovation and reform in classroom teaching from three aspects: the content of courses highlights the application of modern engineering technology tools, the teaching methods highlight the application of modern information-based teaching tools, the examination highlights the characteristics of students in the modern information age. It has proved that good results have been achieved by teaching practice. References | Related Articles | Metrics

Standards Regulations Management

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Application of 3C Certification Conformance Control Plan for Commercial Vehicles YANG Zhaowei 2022, 47(9): 164-167.  DOI: 10.16638/j.cnki.1671-7988.2022.009.036 Abstract ( )   PDF (1146KB) ( )   In recent years, due to the problem of vehicle production consistency, there are defects in its product quality and affect its sales from time to time. The problem that enterprises fail to implement the China Compulsory Certification(3C) certification consistency standard in vehicle production has also become the focus of social attention. Therefore, commercial vehicle enterprises need to build a production consistency control plan to realize the consistency management of products, so as to meet the quality certification of products. Based on the analysis of 3C certification mode of commercial vehicles, this paper compiles the production consistency control plan for commercial vehicle models, takes a commercial vehicle as an example, controls the consistency of its key parts and production process, and formulates the control requirements of vehicle production consistency test for cop test. Finally, the consistency control plan of 3C certification is comprehensively applied in the product design, production and after-sales of commercial vehicles. Through this application, the products after mass production meet the requirements of product consistency and meet the national mandatory product certification standards. This has played a good role in improving product quality and protecting consumers' rights and interests. References | Related Articles | Metrics

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The Entity Quality Management in the Research and Development Process of a New Commercial Vehicle Heavy Truck Product WANG Kangjun 2022, 47(9): 168-172.  DOI: 10.16638/j.cnki.1671-7988.2022.009.037 Abstract ( )   PDF (1249KB) ( )   At present, the renewal cycle of China's commercial vehicle heavy truck products is obviously shortened, and the automobile enterprises continue to launch new products, and the market competition is increasingly fierce. The entity quality control of new product development stage will determine the market competitiveness of products. In order to provide a new product quality to ensure the commercial heavy truck meets the desired and controlled reqminemerd practice, this paper takes path new products in a commercial heavy vehicle as an example, the main stages in the process of new product development as the main line, from two aspects of spare parts and vehicle introduces the quality control concrete content and method, in vehicle. The test result that quality control the quality validation test, the new product of a commercial vehicle heavy truck has a good market quality performance after being launched. This paper is worthy of reference and promotion for domestic commercial vehicle enterprises, and will consolidate the strength for the high-speed and high-quality development of independent brand commercial vehicles. References | Related Articles | Metrics

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Exploration on the Construction Ideas of the Theme-based Service Area of Expressway in Henan Province —A Case Study of Zhengzhou West Service Area BAO Ruige 2022, 47(9): 173-177.  DOI: 10.16638/j.cnki.1671-7988.2022.009.038 Abstract ( )   PDF (1163KB) ( )   In order to meet the higher requirements of the public for travel experience, consumption environment, consumption methods, etc., this paper starts with the actual case of Zhengzhou west service area of Zhengzhou southwest ring expressway, and explores the construction ideas of theme-based service areas, as well as provides reference for other service areas in Henan Province. Different from conventional service areas, theme-based service areas should follow the construction idea of "Resources-Demand-Positioning-Planning-Design". In the early stage of construction, the cross-section flow data of the road section where the service area is located, the economic level and industrial structure of surrounding cities, etc. should be deeply excavated. Determine the type of vehicles, personnel composition, travel purpose, consumption preference, consumption level, actual demand, and the demand of surrounding population, city, industry along the line is of first importance, and then accurately plan the functional configuration and positioning of the service area. Based on this, we can carry out project planning and architectural design finally. References | Related Articles | Metrics

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Compiling Methods and Common Problems of Terminology Standards in Enterprises YUAN Lixia 2022, 47(9): 178-183.  DOI: 10.16638/j.cnki.1671-7988.2022.009.039 Abstract ( )   PDF (1293KB) ( )   Terminology is one of the basic elements of the standard. The confusion of terminology will seriously affect the understanding and implementation of the standard. Terminology standardization is the need of the development of modern society and information technology, and terminology standard is also an important basic standard. It is one of the main tasks to draft terminology standard or chapter "terms and definitions" correctly. Therefore, this paper refers to GB/T 20001.1—2001 and GB/T 1.1—2020 and other standards, and combines with the actual situation of enterprises, combs and analyzes the structure, content, compilation methods and common problems in the compilation process of terminology standards. References | Related Articles | Metrics

Overview

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Analysis of Magotan B81.8T Starter Cannot Start Fault Diagnosis CHEN Meiqin 2022, 47(9): 184-188.  DOI: 10.16638/j.cnki.1671-7988.2022.009.040 Abstract ( )   PDF (1394KB) ( )   Based on the typical engine faults of fujian province vocational skills competition "Automobile Technology", this paper analyzes the failure of Magotan B8 starter. The mechanism of engine failure caused by starter failure is described in detail. On this basis, typical faults are analyzed and the thoughts and steps of troubleshooting are discussed. At the same time, the mechanism of failure is summarized, so as to promote professional teaching reform and curriculum reform and innovation pace, so as to realize the integration of competition and certification. References | Related Articles | Metrics

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The Current Situation and Developing Tendency of Automobile Manufactory Water Treatment Technology Application FENG Zheng 2022, 47(9): 189-193.  DOI: 10.16638/j.cnki.1671-7988.2022.009.041 Abstract ( )   PDF (1259KB) ( )   Water application always involves in automobile manufacture process. Nowadays as water recourse increasing exhausted, water quality deteriorate and water pollution accident occurs frequently in our country, public awareness of environment protection is increasing and national policy also puts forward to more and more restrict requirement. Therefore, these large water consumption automobile assembly factories attach more and more attention to water treatment application. This paper mainly introduces the current situation of water treatment application involved in process plant and energy power plant, presents water treatment theory, water treatment chemicals, and the current situation of water quality management. This articles also draw a conclusion about water treatment facility operation management and water quality management methods, and look ahead the developing tendency of water treatment technology and management in modern automobile manufactories. References | Related Articles | Metrics