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15 June 2022, Volume 47 Issue 11 Previous 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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Thermal Simulation Analysis of Electric Vehicle Charging Pile Power Module WANG Jun 2022, 47(11): 1-5.  DOI: 10.16638/j.cnki.1671-7988.2022.011.001 Abstract ( )   PDF (953KB) ( )   The electric vehicle, as the most popular new energy vehicle, is widely used in the modern transportation field, and is the main force to promote the automotive industry to achieve carbon peak and carbon neutrality as scheduled. The electric vehicle charging pile is an indispensable key supporting equipment for the development of electric vehicles. In order to study the thermal stability of the electric vehicle charging pile power module, this paper establishes a power module model and determines the reasonable printed circuit board (PCB) main heat generating component arrangement form and air-cooled structure design through thermodynamic simulation analysis, which improves the rationality of structure design and long-term temperature rise stability of electric vehicle charging pile power module. The paper provides a solution and research idea for the technical development and scientific research of charging pile power module. References | Related Articles | Metrics

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Structural Analysis of Electric Vehicle Battery-switchable Chassis Based on Finite Element Method BAI Yuwei 2022, 47(11): 6-11.  DOI: 10.16638/j.cnki.1671-7988.2022.011.002 Abstract ( )   PDF (2825KB) ( )   In order to understand and master the distribution of strain and stress of the electric vehicle battery-switchable chassis under the rated load, the type of the battery-switchable chassis is studied, the composition structure of the cell split type of battery-switchable chassis is analyzed, the three-dimensional model of the chassis is drawn by SolidWorks software, and the structure analysis of the type of battery-switchable chassis is carried out by using ANSYS. The equivalent stress cloud diagram and total deformation cloud diagram are obtained. Based on this, the structure optimization is carried out, and the verification and analysis are carried out to provide the optimization basis for the overall research and development of the battery-switchable chassis, so as to promote the rapid development of the electric vehicle battery-switchable industry. References | Related Articles | Metrics

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Application of a New Energy Vehicle Real-time Monitoring System to Fuel Cell Vehicles HU Zhouyu 2022, 47(11): 12-15.  DOI: 10.16638/j.cnki.1671-7988.2022.011.003 Abstract ( )   PDF (671KB) ( )   A real-time monitoring system for new energy vehicle is requested by Chinese national standard GB/T32960—2016. It is one of the most important means to improve the safety operation as well as the popularization of new energy vehicle in China. Fuel cell vehicle is also considered as one of most important branches of new energy vehicles, however real-time monitoring data collection on fuel cell vehicles under current standard’s framework could not meet actual engineering needs. In order to better reflect working status of a fuel cell vehicle, especially its fuel cell system, the relevant implementation method of real-time monitoring on a fuel cell vehicle is proposed to push for the continuous improvement of relevant national standard. References | Related Articles | Metrics

Intelligent Connected Vehicle

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Application and Development of Artificial Intelligence in the Field of Automobile Driving Technology YANG Kang 2022, 47(11): 16-19.  DOI: 10.16638/j.cnki.1671-7988.2022.011.004 Abstract ( )   PDF (522KB) ( )   The application of artificial intelligence in the field of automotive driving technology has been a major trend and has a good development prospect. In order to better explore the role and value of AI in the field of automotive driving technology, the article provides a detailed introduction to the application of AI in driver assistance, partial driverlessness, standard driverlessness, aspect ratio driverlessness, completely driverlessness, driverless deep neural network, driverless resource sharing, etc. On this basis, the challenges and prospects of AI applications in autonomous driving are analysed to provide reference for relevant researchers. References | Related Articles | Metrics

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Development Practice of the Concept Phase of Automotive Functional Safety DUAN Jinliang 2022, 47(11): 20-23.  DOI: 10.16638/j.cnki.1671-7988.2022.011.005 Abstract ( )   PDF (779KB) ( )   Automotive functional safety is a necessary technical component of intelligent connected vehicles. This article introduces the background and development process of the ISO 26262 standard, the main content of the concept stage in the ISO 26262 standard and the setting method of automotive safety integrity level. Taking the function of the automatic driving system as an example, the work content of the functional safety of the automobile in the concept phase is explained, the functional safety goal of the automatic driving system is determined, and the specific functional safety requirements for each subsystem are analyzed and formed. Through research, development research and practice on the concept stage of automotive functional safety is carried out. References | Related Articles | Metrics

Design and Research

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DMU Intelligent Checking Method of Vehicle General Layout YU Wanyu 2022, 47(11): 24-29.  DOI: 10.16638/j.cnki.1671-7988.2022.011.006 Abstract ( )   PDF (796KB) ( )   Based on the digital mock up module in CATIA, this paper analyzes the problems in the vehicle general layout verification process, and proposes a vehicle general layout digital mock up intelligent verification method for the first time, including the three-dimensional vehicle model data integrity control and gap intelligent checking method. At the same time, a set of intelligent verification tools for vehicle data was developed based on this method. This tool effectively solves the problem of inconvenient and unsuitable application of foreign industrial software in key scenarios of domestic car companies. For example, the digital mock up module cannot perform the complete vehicle 3D model data integrity check, and the gap between pairs of specific name components cannot be batch checked. Apart from this, these tools also can solve the problem that the inspection results cannot be exported. This method greatly improves the efficiency and accuracy of the overall vehicle layout verification. References | Related Articles | Metrics

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Rear-impact Analysis and Structural Optimization of Light Hybrid Vehicle Based on Finite Element Method LIANG Chunlong 2022, 47(11): 30-33.  DOI: 10.16638/j.cnki.1671-7988.2022.011.007 Abstract ( )   PDF (1685KB) ( )   To improve the efficiency of the back end of the body, after the battery pack area reduce collision kinetic energy, reduce the impact on the battery pack, first using Ansa body structure finite element mesh modeling, and then by LS-DYNA light hybrid vehicle collision of finite element simulation calculation, finally study the plastic deformation of rear end parts process. At the same time, the structure of the rear end area of the vehicle body is appropriately optimized to make the deformation mode of this area more reasonable and reliable. Then, the rear collision performance meets the requirements of the relevant regulations. References | Related Articles | Metrics

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A New Multi-position Transmission Design Based on End Face Planetary Gear Train SHENG Yuting 2022, 47(11): 34-40.  DOI: 10.16638/j.cnki.1671-7988.2022.011.008 Abstract ( )   PDF (862KB) ( )   To obtain a miniaturised, lightweight, compact, multi-gear, low-cost gearbox structure suitable for heavy tractor loads, a new multi-gear transmission based on a planetary gear system was designed by referring to the idea of changing the transmission ratio in a rear axle and introducing it into the transmission structure. A total of 8 operating conditions were calculated for the main transmission and 2 forward gears and 1 reverse gear for the secondary transmission, i.e. 24 theoretical forms of gear changes exist. After taking MATLAB programming method to match the number of teeth, it was found that when Z4=54, Z5=30, Z6=74 and Z7=27 the eight ratios of the main transmission are 0.27, 0.50, 0.73, 0.90, 1.36, 1.37, 1.99 and 2.47, which basically meet the gearing requirements. The structure and power transmission of the new multi-gear gearbox introduced in this paper can provide theoretical reference for the development of subsequent new gearboxes. References | Related Articles | Metrics

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The Modular Technology of Heavy Truck Interiors JIA Chuang 2022, 47(11): 41-44.  DOI: 10.16638/j.cnki.1671-7988.2022.011.009 Abstract ( )   PDF (1527KB) ( )   In order to improve the current situation of low assembly efficiency of heavy truck interiors system assembly, taking the problems in the modular design and development process of a certain heavy truck as the core research object, finds out the key influencing factors of modular technology, and then deduces the key technology of modular design. Finally, it discusses the effect of modulari- zation technology and prospects for modularization technology. Modular design integrates many components to improve the assembly efficiency. References | Related Articles | Metrics

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Analysis on Overlength Brake Pedal Stroke of AT Vehicle WANG Xiandong 2022, 47(11): 45-48.  DOI: 10.16638/j.cnki.1671-7988.2022.011.010 Abstract ( )   PDF (800KB) ( )   In order to shorten the brake pedal stroke of an off-road AT vehicle, several main related factors are analyzed. Preliminarily, through the analysis of the braking process, it is determined that the solution is to exhaust the brake pipeline and replace the brake master cylinder-vacuum booster assembly. Finally, the problem is solved by exhausting through the brake pipelines. The practice provides a successful experience towards brake system design and problem analysis of subsequent vehicle development. References | Related Articles | Metrics

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Vehicle Around View Monitoring System and Its Performance Evaluation XU Qingkui 2022, 47(11): 49-53.  DOI: 10.16638/j.cnki.1671-7988.2022.011.011 Abstract ( )   PDF (2640KB) ( )   The around view monitoring system is a key function involved in the field of advanced driver assistance systems. This paper introduces the working principle and functions of the system. From the driver's point of view, it lists the performance indicators that should be focused on during development, such as system response time, guidelines, view range, synchronization time and splicing effect, etc., and provides a set of integral test evaluation system and method. The test results show that the evaluation system can objectively evaluate the overall performance of the system, and provide a reference for the development, design and test verification of around view monitoring system. References | Related Articles | Metrics

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Study on New PBT Flame Retardant Material for Automobile ZUO Long 2022, 47(11): 54-60.  DOI: 10.16638/j.cnki.1671-7988.2022.011.012 Abstract ( )   PDF (2302KB) ( )   The intumescent flame retardant content-gradient distribution in poly (butylene terephthalate) was prepared in co-rotating twin-screw extruder and plate vulcanizing technology. The poly (butylene terephthalate)/ intumescent flame retardant particles by co-rotating twin-screw extruder, and followed by plate vulcanizing technology that fabricating intumescent flame retardant particles content-gradient distribution in poly (butylene terephthalate) through melting had physical blended particles of uniform size, the same volume and two different intumescent flame retardant content in the poly (butylene terephthalate). The flame retardant, mechanical properties and morphological features of intumescent flame retardant content-gradient distribution in poly (butylene terephthalate), which were respectively obtained by the limited oxygen index, UL-94, thermogravimetry analysis, scanning electron microscope, the polarizing microscope. Limited oxygen index and UL-94 tests results showed that with a little change of particle content-gradient distribution in poly (butylene terephthalate)/ intumescent flame retardant, the flame retardant property of poly (butylene terephthalate)/ intumescent flame retardant was better. Tensile and impact tests presented that a little change of particle content-gradient distribution in poly (butylene terephthalate)/ intumescent flame retardant had no effect on its mechanical properties comparing to uniform poly (butylene terephthalate)/ intumescent flame retardant composites of the same intumescent flame retardant content. References | Related Articles | Metrics

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The Optimization and Analysis of the Lightweight Structure of a Commercial Vehicle Front Guard Plate LIU Fan 2022, 47(11): 61-64.  DOI: 10.16638/j.cnki.1671-7988.2022.011.013 Abstract ( )   PDF (1694KB) ( )   In order to ensure the strength, stiffness and safety performance of the vehicle and parts unchanged under the premise of weight reduction as much as possible, improve the working performance of the vehicle, to achieve energy saving, green, environmental protection and sustainable development. Based on the theory of nonmetallic composite material science,vehicle structure and numerical simulation analysis, Hyperworks finite element software was used to carry out structural optimization design and comparative analysis of the front guard plate and its mounting bracket of a commercial vehicle, CAE stiffness and modal analysis of lightweight front guard plate, and relevant impact tests were also carried out.The results show that the stress and modal of the front protection plate are optimized and improved after the use of composite materials, and the weight of the front protection plate is reduced by 3 kg, and the lightweight effect is significant. References | Related Articles | Metrics

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Optimisation of Rear Suspension Shock Residual Jitter in a Rear-wheel Drive Electric Vehicle ZHANG Lunwei 2022, 47(11): 65-69.  DOI: 10.16638/j.cnki.1671-7988.2022.011.014 Abstract ( )   PDF (2508KB) ( )   In order to improve the rear suspension impact residual jitter problem of an electric vehicle, the vibration pattern of the impact residual jitter was measured by sensors, and the structure and stiffness of the rear subframe bushings and drive motor mounts were redesigned from the perspective of reducing the impact energy and optimising the vibration mode. After repeated exploration, the problem of residual jitter of the rear suspension of this model was successfully solved. In addition, based on the summarisation of the process test data and the subjective driving experience, a correspondence between the subjective evaluation and the objective test data was also established, which provides an engineering reference for the design optimisation and problem analysis of the drive motor- suspension system impact residual jitter problem of the same type of arrangement design. References | Related Articles | Metrics

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Motor Torque Error Collision Detection Based on Robot Dynamics Compensation YOU Wei 2022, 47(11): 70-76.  DOI: 10.16638/j.cnki.1671-7988.2022.011.015 Abstract ( )   PDF (2073KB) ( )   In the process of robot human-machine interaction, stable collision detection is the guarantee of human-machine safety and the safety of the equipment itself. Therefore, this paper proposes a robot collision detection method with load and no additional sensors. Through the compensation of the robot dynamics model, the error of the motor torque of each joint of the robot is analyzed, and the load identification and collision detection are realized. In this paper, various parameters of the load are added to the dynamic calculations to compensate for the errors caused by the load on the dynamics calculations. Through the analysis of the torque error of each joint motor, the error extreme value in each speed segment is screened, and the envelope of the upper and lower limits of the error-speed curve is fitted, and the dynamic threshold is set. The simulation results show that the established dynamic compensation model can effectively identify the load, eliminate the interference of the end load, and can accurately realize the collision detection function with the change of the robot's movement speed. References | Related Articles | Metrics

Testing and Experiment

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Analysis of Expansion Characteristics of Cup of Vehicle Brake Master Cylinder ZHOU Yaohua 2022, 47(11): 77-81.  DOI: 10.16638/j.cnki.1671-7988.2022.011.016 Abstract ( )   PDF (1883KB) ( )   Being the important element of execution, the brake master cylinder achieves oil seal relying on seal cup, and produce brake pressure. EPDM seal cup will keep expanding if dipping in brake fluid for a long time. Upon soaking testing of different duration, through the immersion durability test, three factors related to the expansion of the leather cup have been clarified: its own material composition, use temperature and the content of mineral oil (plasticizer) in the brake fluid. Finally, according to the testing result of whole vehicle, it comes the conclusion, the sealing lip will have fold if seal cup expands more than 5%, which make the cylinders have crevice, and resulting in internal pressure relief. Eventually it makes the braking inactive. References | Related Articles | Metrics

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Resilience Properties of Single Point Progressive Mouldless Forming WU Yunteng 2022, 47(11): 82-86.  DOI: 10.16638/j.cnki.1671-7988.2022.011.017 Abstract ( )   PDF (1348KB) ( )   A standard resilience verification model is established for the resilience of the sheet in the digital single point progressive forming process and the internal corner spacing dimension is used as the evaluation criterion. The four process parameters affecting the resilience characteristics are found and optimised using design for six Sigma thinking using an orthogonal approach to find the optimal process parameter card for the resilience characteristics through signal to noise ratio analysis. The process package with the optimum parameters for the resilience characteristics was a maximum layer spacing of 1.2 mm, a one-way contour path forming trajectory, and a feed rate of 8 000 mm/min in the maximum speed mode. Using the optimised parameter package, it was found that the resilience was reduced from 5 mm to 1 mm, the resilience rate was reduced from 1.9% to 0.5%, and the resilience was reduced by 4 mm, with significant results. References | Related Articles | Metrics

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The Shifting Process of Synchronizer-less Mechanical Automatic Transmission QIN Xingcun 2022, 47(11): 87-93.  DOI: 10.16638/j.cnki.1671-7988.2022.011.018 Abstract ( )   PDF (1389KB) ( )   Due to the simple mechanism and high mechanical efficiency of synchronizer-less mechanical automatic transmission, it can improve energy utilization efficiency and range in electric vehicles. In order to promote the application of synchronizer-less mechanical automatic transmission to electric vehicles, focusing on its problems of shift shock and power interruption, a dynamics model of the engagement sleeve and engagement gear ring is established to investigate the shift shock mechanism and the factors affecting the shift quality. Simulations were conducted in AMEsim to analyze the changes of shift shock, shift time and other shift quality indicators under different initial speed difference and shift force conditions. The results show that the larger the initial speed difference between the engagement sleeve and the engagement ring, the longer the shift time and the larger the shift shock; the larger the initial shift force, the shorter the shift time, but the shift shock becomes larger. When the initial conditions of the shift process are high shift force and low speed difference, both shorter shift time and lower shift shock can be obtained and the shift quality is improved. References | Related Articles | Metrics

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Intelligent Power Device’s Energy Analysis and Calculation for Electronic Fuse HONG Wei 2022, 47(11): 94-97.  DOI: 10.16638/j.cnki.1671-7988.2022.011.019 Abstract ( )   PDF (1153KB) ( )   With the development of automotive electronic technology, upgrading of electronic architecture also drives the large-scale application of intelligent power device in vehicle load drive. For loads with large sensing capacity, such as wipers, blowers, fans and relays, the impact of the energy generated when the load is turned off on the system needs to be considered, and the driver cannot be broken down by the energy. This paper provides a method and tool to evaluate and measure the inductive energy. In a well-defined application scenario, the energy generated by instantaneous turn off is compared with the energy capability of intelligent power device itself to ensure whether the intelligent power device and system can work reliably for a long time. References | Related Articles | Metrics

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Lightweight of a Light Truck Battery Support Based on ABAQUS GAN Lei 2022, 47(11): 98-101.  DOI: 10.16638/j.cnki.1671-7988.2022.011.020 Abstract ( )   PDF (7555KB) ( )   Light truck is an important commercial transportation tool in the national economy. Because the blue light truck has the right of way advantage, lightweight is the key path to realize the blue light truck. Based on the theory of materials and finite element, this paper uses ABAQUS simulation software to carry out the structural comparison and lightweight optimization design of battery supports of different brands. At the same time, the acceleration data of the battery support in the real state of the light truck under the road conditions of a test site are measured. According to the excitation data, the finite element model is introduced for load loading and transmission, and the CAE strength of the lightweight scheme of the light truck battery support is compared and analyzed. The results show that the performance of the battery support meets the target requirements. The weight of the lightweight scheme is reduced by 1.2 kg, and the lightweight effect is remarkable. References | Related Articles | Metrics

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Talking about the Feel Calibration of Electric Power Steering of a Micro Car HUANG Jiyu, WANG Dingbo, LIU Shuisheng 2022, 47(11): 102-107.  DOI: 10.16638/j.cnki.1671-7988.2022.011.021 Abstract ( )   PDF (1410KB) ( )   With the development needs of various domestic industries, the demand for miniature cars is still large, and the requirements for steering feel are getting higher and higher. This paper proposes the process of calibrating the feel of electric power steering by simulating the daily use scenarios of users and verifying the performance of guaranteeing the difference in feel. Aiming at the calibration of steering feel, the functions and optimization methods of the three control parameters of the electric power steering system, including power assist, alignment and damping, are mainly introduced, and the system performance target requirements are achieved through subjective verification. In the past, the electric power steering calibration did not require system parts. After mass production, there was a serious difference in feel and quality problems. After the calibration was completed, the parts within the upper and lower limit tolerance range were subjectively evaluated, so that the parts within the tolerance range can meet the product. The definition of performance goals is required to ensure that the steering performance of mass-produced vehicles has a high consistency, and it is hoped that it will serve as a reference for With the development needs of various domestic industries, the demand for miniature cars is still large, and the requirements for steering feel are getting higher and higher. This paper proposes the process of calibrating the feel of electric power steering by simulating the daily use scenarios of users and verifying the performance of guaranteeing the difference in feel. Aiming at the calibration of steering feel, the functions and optimization methods of the three control parameters of the electric power steering system, including power assist, alignment and damping, are mainly introduced, and the system performance target requirements are achieved through subjective verification. In the past, the electric power steering calibration did not require system parts. After mass production, there was a serious difference in feel and quality problems. After the calibration was completed, the parts within the upper and lower limit tolerance range were subjectively evaluated, so that the parts within the tolerance range can meet the product. The definition of performance goals is required to ensure that the steering performance of mass-produced vehicles has a high consistency, and it is hoped that it will serve as a reference for References | Related Articles | Metrics

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Component Rig Test Method Correlated to Complete Vehicle ZHOU Dequan 2022, 47(11): 108-111.  DOI: 10.16638/j.cnki.1671-7988.2022.011.022 Abstract ( )   PDF (1612KB) ( )   Complete vehicle and component durability tests are the critical stage of vehicle R&D. A new component durability test method which correlated to complete vehicle test is proposed. Firstly, the complete and component tests is analyzed, based on the damage, rain-flow and phase correlation, an optimization method for component durability test is proposed; uni-axial & multi-axial load cases are analyzed and equivalent test method is proposed. Actual test result show that this new method is well correlated to the complete vehicle test and able to improve the test efficiency. References | Related Articles | Metrics

Process and Equipment

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Software Design for Stamping Process ZENG Hui 2022, 47(11): 112-118.  DOI: 10.16638/j.cnki.1671-7988.2022.011.023 Abstract ( )   PDF (1603KB) ( )   In order to solve the problems of inconvenient teaching, complicated process and low application efficiency of traditional methods of industrial robots in the stamping industry, through graphical setting and programming, combined with the process requirements of stamping site, the process software for stamping operation of various workstations is developed. The software design is combined with robots, and the on-site debugging skills are used to increase the stability of parts production under different punching times of production line press, improve the surface quality of stamping parts, also meet the stability requirements of stamping production, simplify the stamping process setting process and mode, reduce the operation difficulty of robot, improve the programming efficiency, and improve the production efficiency. References | Related Articles | Metrics

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Analysis of Component Protection Process during Engine Assembly SHAO Qing 2022, 47(11): 119-123.  DOI: 10.16638/j.cnki.1671-7988.2022.011.024 Abstract ( )   PDF (2260KB) ( )   Parts may be damaged during transportation, cleaning and placement, practical significance to strengthen the analysis and research of parts protection during engine assembly. Through the component protection analysis of the engine assembly process, we propose and analyze the installation sequence, combination group and key process parts, which can effectively avoid component damage, improve the assembly efficiency and reduce the cost of the whole assembly process. References | Related Articles | Metrics

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Analysis of Groove Design and Welding Parameters of Large Thick Wall Butt Circumferential Weld WANG Guoding 2022, 47(11): 124-128.  DOI: 10.16638/j.cnki.1671-7988.2022.011.025 Abstract ( )   PDF (1511KB) ( )   The groove structure of the butt circumferential weld of axle head of an axle housing is optimized and analyzed. Combined with the actual welding process, different parameter groups are designed for welding test. Through the weld section inspection and physical and chemical analysis, the best welding break structure and welding parameter matching are obtained. Eliminate the root non fusion defect caused by welding deviation, ensure the minimum penetration value of the weld, and solve the problem of after-sales weld fracture. By optimizing the welding process parameters, clarifying the welding process control measures and methods, and applying them in mass production in actual production, the welding process cost is decreasing and the welding production efficiency is increasing. References | Related Articles | Metrics

Automobile Education

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Reform and Practice of Automobile Professional Group Construction under the Background of "Double-high Plan" ZHU Jianbao 2022, 47(11): 129-133.  DOI: 10.16638/j.cnki.1671-7988.2022.011.026 Abstract ( )   PDF (1186KB) ( )   With the implementation of the national vocational education reform plan and the "double high plan", the automobile industry structure continues to transform and upgrade, and the construction and reform of Automobile Specialty in higher vocational colleges is imminent. The automotive specialty of Fujian Chuanzheng Communication College meets the needs of the automotive industry, defines the construction orientation of the specialty group, adheres to the party construction leading the professional construction, explores and practices the reform of teaching innovation team construction, talent training mode and training base construction, so as to improve the quality of talent training and enhance the adaptability of automotive vocational education, in order to provide some construction ideas for peers. References | Related Articles | Metrics

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The Operation Mode of Alliance Applied Undergraduate Industrial College WANG Xin 2022, 47(11): 134-138.  DOI: 10.16638/j.cnki.1671-7988.2022.011.027 Abstract ( )   PDF (1170KB) ( )   Modern industrial college has its internal mechanism and unique advantages in carrying out collaborative education. It is an effective carrier for school enterprise cooperation and industry education collaboration.According to the development characteristics of Alliance Industrial College, this paper analyzes the opportunities and challenges in the operation and management of modern industrial college, and puts forward a multi-party collaborative education mechanism to realize benefit sharing and long-term operation by aiming at cultivating talents. This mechanism can effectively clarify the internal management organization structure form and scope of responsibilities and rights of the college. In the process of college operation management, it can scientifically and reasonably realize the management of personnel, finance, assets, teaching and scientific research. And in the later practical application, remarkable results have been achieved. References | Related Articles | Metrics

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Research on Mixed Teaching of First-class Undergraduate Courses Based on Engineering Accreditation —Taking the Course of Machinery Manufacturing Technology Foundation as an Example GAO Qi 2022, 47(11): 139-142.  DOI: 10.16638/j.cnki.1671-7988.2022.011.028 Abstract ( )   PDF (1125KB) ( )   Machinery Manufacturing Technology Foundation course is highly comprehensive, practical and flexible, and it is a professional basic course for mechanical and near-mechanical undergraduates. In order to cultivate first-class applied talents, combined with the innovative characteristics of school education and teaching, the teaching reform of course was promoted based on the engineering education accreditation. Aiming at the teaching content, teaching methods and quality evaluation standards of the course, a hybrid online and offline method is used. The reform of teaching process was carried out and a method for evaluating the quality of mixed teaching was put forward. Taking students as the center, based on mechanical engineering projects, students can carry out diverse classroom learning activities with problems, and the teaching method can stimulate students’ interest in learning, and improve learning effects. References | Related Articles | Metrics

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The Application of PDCA Cycle in the Project Teaching —Take the Project "Troubleshooting the Abnormality of the Power Battery System" as an Example JIANG Qinglai 2022, 47(11): 143-148.  DOI: 10.16638/j.cnki.1671-7988.2022.011.029 Abstract ( )   PDF (1189KB) ( )   "Troubleshooting the Abnormality of the Power Battery System" is a teaching project in the professional core course of "Maintenance and Fault Diagnosis of New Energy Vehicles" with practical work tasks as the carrier. This paper integrates the PDCA cycle concept into the teaching project and builds the PDCA cycle teaching mode with "Task cycles progress, and roles change in turns" based on the job workflow and student-centered. Project-driven and theory-practice-integrated teaching are adopted to create immersive professional experience. Practice has proved that the introduction of the PDCA cycle helps to improve students' professional ability and comprehensive literacy. References | Related Articles | Metrics

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The Teaching Reform of Mechanical Principle Course Centered on Students ZHAO Rongrong 2022, 47(11): 149-153.  DOI: 10.16638/j.cnki.1671-7988.2022.011.030 Abstract ( )   PDF (1324KB) ( )   In view of the training orientation of applied talents in the college and the problems of "single teaching mode" and "low rise rate" in the teaching of mechanical principle course, this course takes students as the center and constructs a hybrid teaching mode combining online and offline from three links: pre-class learning, classroom teaching and after-school homework. In the design and implementation of teaching content, it pays attention to the cultivation of students' ability and the shaping of values, integrates engineering cases and ideological and political elements into the teaching content, designs and implements classroom teaching activities from "engineering problems", "theoretical knowledge" to "engineering application". In the process of imparting professional knowledge, it emphasizes the application of theoretical knowledge through the analysis and solution of engineering case problems, and imperceptibly cultivates students' engineering literacy. In addition, it naturally introduces ideological and political elements into classroom teaching to achieve the effect of teaching, educating people and moistening things silently. At the same time, actively play the role of the second class after class, add extension projects such as work design, cultivate students' teamwork spirit. These teaching activities not only improve students' participation in the course, make students the main body of teaching activities, but also cultivate students' ability to analyze and solve problems. References | Related Articles | Metrics

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Improving the Teaching Ability of Teachers Majoring in Automobile Inspection and Maintenance Technology by "Three in One" Mode WU Shan 2022, 47(11): 154-157.  DOI: 10.16638/j.cnki.1671-7988.2022.011.031 Abstract ( )   PDF (1156KB) ( )   Under the background of "building a high-level double division team" in the double high plan of Xianyang vocational technical college, the automobile inspection and maintenance technology specialty group of Xianyang vocational technical college follows the idea of "building an excellent platform, building a strong team and building a good model", relying on the sino foreign cooperative school running project with F+U saxony vocational training college in germany and the school enterprise cooperation project with hengfeng group, innovates and practices the sino german joint education the "three in one" teacher training mode of school enterprise integration and competition teaching coupling has effectively improved the teaching ability and teaching quality of professional group teachers. References | Related Articles | Metrics

Standards Regulations Management

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The Service System of Automobile Maintenance Outlets Based on "Internet +" YU Jie 2022, 47(11): 158-162.  DOI: 10.16638/j.cnki.1671-7988.2022.011.032 Abstract ( )   PDF (1079KB) ( )   The transformation and reform of traditional automobile maintenance industry based on "Internet+" technology is conductive to the optimization and upgrading of automobile maintenance industry. This paper analyzes the "Internet+" automobile maintenance network operating mode, constructs based on the "Internet+" automobile maintenance enterprise service system of the specific content, elaborats based on the "Internet+" automobile maintenance enterprise combination of online and offline service system of the main advantages. To promote the competitiveness of the network service, combination of online and offline service outlets, this paper puts forward the service idea and specific process of automobile maintenance enterprise service network optimization from three aspects of consumer module, store online system and network technician module. References | Related Articles | Metrics

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The Application of Standardized Operation in the Manufacturing Process of Assembly Workshop YANG Jiankang 2022, 47(11): 163-166.  DOI: 10.16638/j.cnki.1671-7988.2022.011.033 Abstract ( )   PDF (1193KB) ( )   Combined with the actual production case of a general assembly workshop, discusses the effect of standardized operation in reducing cost and increasing efficiency in the actual production process, and effectively improves the demand of lean production. Its core lies in the preparation of standardized process operation documents, which is mainly to let the front-line employees on the production line deeply understand the steps and connotation of standardized operation, start from themselves, develop good professional quality and standardize their own behavior. Through the implementation of standardized operation, the production efficiency of production line has been significantly improved, the occurrence of safety accidents in the production process has been gradually reduced, and the ability of relevant production and manufacturing departments to deal with problems has been strengthened. The implementation of standardized operation can play an important role in the consistency and safety of vehicle assembly. In the later stage, it can also have a positive impact on enhancing the market competitiveness of the enterprise, improve the mechanical manufacturing and design ability of the whole enterprise, and lay a solid foundation for the steady development of the enterprise. References | Related Articles | Metrics

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Research on Material Cost Control Model in Passenger Car Research and Development Project CAO Bin 2022, 47(11): 167-173.  DOI: 10.16638/j.cnki.1671-7988.2022.011.034 Abstract ( )   PDF (1822KB) ( )   With the increasingly fierce competition in the passenger car market, the prices of bulk raw materials and various chips continued to rise, the survival pressure of passenger car enterprises has increased rapidly. For the survival and development of passenger car enterprises, innovating material cost control mode is a necessary means. This paper analyzes and studies the development scope, parts development and carry over strategy, configuration planning, material cost list and material cost composition of passenger car research and development project, establishes the material cost control model of passenger car research and development project by using GBOM system, SAP system and Excel. This paper analyzes the material cost control model of passenger car research and development project, which has a certain reference significance for alleviating the pressure of enterprise cost competition and improving the level of material cost control. References | Related Articles | Metrics

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Development Status and Countermeasures of New Energy Vehicle Industry in Changshu City WANG Qifeng 2022, 47(11): 174-178.  DOI: 10.16638/j.cnki.1671-7988.2022.011.035 Abstract ( )   PDF (1262KB) ( )   To promote the rapid development of the new energy vehicle industry, a 100 billion-level automobile city will be built by creating a high-quality development engine for Changshu's new energy vehicle industry. Based on the development status of my country's new energy vehicle industry, this paper analyzes the characteristics and current situation of Changshu's new energy vehicle industry. In view of the existing problems in its development, combined with Jiangsu Province's "14th Five-Year" new energy vehicle industry development plan, seven countermeasures and suggestions for accelerating the development of Changshu's new energy vehicle industry are put forward. That is to strengthen organizational leadership, coordinate all kinds of resources, strengthen precise support, improve the new energy automobile industry chain, strengthen talent team construction, implement investment selection project, expand hydrogen fuel cell vehicle demonstration operation and other measures, in order to achieve rapid, healthy and sustainable development of References | Related Articles | Metrics

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A Review of the Relationship between Automobile Evolution and the Development of the Times KONG Jing 2022, 47(11): 179-182.  DOI: 10.16638/j.cnki.1671-7988.2022.011.036 Abstract ( )   PDF (1070KB) ( )   The automobile industry connects people's daily travel, transportation, automobile manufacturing, logistics, ecology, and artificial intelligence. The impact of different times on automobile development and the process of automobile evolution is analyzed. In addition, the direction and existing problems of automobile development at the present stage are discussed. In order to solve these problems, the methods and proposals are put forward. References | Related Articles | Metrics

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The Design Review of STR Drive Axle Assembly Test Bench LV Dongteng 2022, 47(11): 183-186.  DOI: 10.16638/j.cnki.1671-7988.2022.011.037 Abstract ( )   PDF (1253KB) ( )   Drive axle assembly is an important component of automobile, and its braking performance directly affects the safety of automobile driving. According to the specific technical indexes of an axle company, the design requirements of the automatic control system of the STR drive axle assembly comprehensive test bench, the working principle of the mechanical equipment of the test bench are mainly introduced, and the composition of the control system and the specific configuration of each module of the STR drive axle assembly comprehensive test bench are designed. The test bench is stable and reliable and providing a new idea for the design of vehicle drive axle assembly. References | Related Articles | Metrics

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The Non-thermal Plasma Purification Technology LIU Huanian 2022, 47(11): 187-190.  DOI: 10.16638/j.cnki.1671-7988.2022.011.038 Abstract ( )   PDF (1110KB) ( )   The existing purification and treatment devices of diesel engines can’t meet the increasingly stringent emission regulations. Non-thermal plasma has the characteristics of good purification effect and no secondary pollution, and has increasingly become the focus of diesel engine exhaust research. Focusing on the plasma dominated by hydroxyl radical generated by liquid-like method, this paper expounds its advantages and specific implementation methods, and discusses the technical route of the cooperation between non-thermal plasma, selective catalytic reduction and diesel particulate filter. The research shows that non thermal plasma has remarkable results in improving diesel engine exhaust emission. References | Related Articles | Metrics

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A Summary of the Construction and Development of New Street Lamp Charging Pile SHENG Yiran 2022, 47(11): 191-194.  DOI: 10.16638/j.cnki.1671-7988.2022.011.039 Abstract ( )   PDF (1120KB) ( )   In recent years, the new energy industry has developed rapidly. People began to understand that new energy has derived a large number of industries, such as the popularity of new energy vehicles everywhere. As the only medium to supply energy, charging pile has a decisive impact on the development of new energy vehicle industry. Nowadays, the charging efficiency of new energy charging piles is low, the charging speed is slow, and there are few charging piles, which can not well meet the needs of new energy vehicle owners. Above all, this article introduced the development of new energy cars, and then illustrated the current situation of charging piles, the existing problems of new energy charging piles are listed and then discusses the feasibility and improvement methods of new energy charging pile, so as to make the new energy industry develop more smoothly. Finally, we imagine the future of new energy charging piles and it provides a reference for the construction of charging pile of new energy vehicles. References | Related Articles | Metrics

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Application and Research of Three-dimensional Printing Technology in the Automotive Industry ZONG Rongrong 2022, 47(11): 195-199.  DOI: 10.16638/j.cnki.1671-7988.2022.011.040 Abstract ( )   PDF (1366KB) ( )   The characteristics and performance advantages of Three-dimensional printing make it one of the most cutting-edge and the most promising technologies, and it is increasingly being used in various fields such as research and development, design, manufacturing, and maintenance in the automotive industry. The article briefly describes the concept, characteristics and process of threedimensional printing technology, and expounds the application status of three-dimensional printing at home and abroad, and points out the key research and development direction of three- dimensional printing in the automotive industry in China. References | Related Articles | Metrics