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30 November 2024, Volume 49 Issue 22 Previous Issue   
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New Energy Vehicle
Intelligent Connected Vehicle
Design and Research
Testing and Experiment
Process·Materials
Automobile Education
Standards·Regulations·Management


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New Energy Vehicle

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Power Shunt Hybird Shift Scheme Matching Analysis GUO Haibao 2024, 49(22): 1-6.  DOI: 10.16638/j.cnki.1671-7988.2024.022.001 Abstract ( )   PDF (1293KB) ( )   According to a light truck model equipped with power shunt two-gear mixing box, the shifting scheme of the mixing box is matched and analyzed. Through theoretical calculation and actual bench data measurement and other methods, the optimal gear matching scheme of the hybrid box is obtained from the definition of gear matching, the analysis of gear shifting time and gear shifting durability, the analysis of gear shifting time when carrying the vehicle, the dynamic and economic performance of the vehicle, and the needs of other systems during the gear shifting process. Through the calculation and analysis of the optimal gear matching scheme, the hybrid box can meet the needs of customers not only in terms of power and economy, but also in terms of comfort. References | Related Articles | Metrics

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Research on Green and Low Carbon Effects of New Energy Vehicles throughout the Entire Life Cycle LIU Jinjing1 , BU Deming2 , LIU Rui1 2024, 49(22): 7-10.  DOI: 10.16638/j.cnki.1671-7988.2024.022.002 Abstract ( )   PDF (514KB) ( )   New energy vehicles are an important direction for the transformation and upgrading of the global automotive industry, which is of great significance in reducing petrochemical energy consumption, addressing climate change, promoting carbon peaking and carbon neutrality. Major countries around the world are vigorously developing the new energy vehicle industry, achieving significant results. But recently, countries and car companies in Europe and America have slowed down their pace of electrification transformation, sparking discussions in the industry about the emission reduction effects of new energy vehicles. This article is based on the current situation of new energy vehicles and energy structure in China, and compares and analyzes the carbon emissions of new energy vehicles and fuel vehicles throughout their entire life cycle. Based on different carbon emission factors, carbon emission models are calculated for each stage from upstream material acquisition to battery, engine, vehicle production and manufacturing, and then to use, vehicle and battery recycling and reuse. The results show that the carbon emissions of new energy vehicles throughout their entire lifecycle are relatively good. References | Related Articles | Metrics

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Modeling of Automotive Fuel Cell and Sensitivity Analysis of Operating Conditions ZHANG Yang, WEN Min, QIAO Zhao 2024, 49(22): 11-17.  DOI: 10.16638/j.cnki.1671-7988.2024.022.003 Abstract ( )   PDF (2673KB) ( )   : Fuel cell is widely used in the field of new energy vehicles, and its output performance is greatly affected by operating conditions. The paper combines the results of the test rig experiment to build a fuel cell simulation model and designs a simulation experiment scheme to analyze the sensitivity of the operating conditions. The results show that the operating conditions such as inlet pressure, inlet humidity, stoichiometric ratio, and stack operating temperature all have a certain degree of influence on the performance of the fuel cell. Compared with the anode, the sensitivity of the cathode operating conditions is higher. The optimal range of operating conditions for the fuel cell is explored, providing reference for the design and performance optimization of automobile fuel cell. References | Related Articles | Metrics

Intelligent Connected Vehicle

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Automatic Extraction Method of in-Service Road Pavement Based on Point Cloud Data YAO Yuan, LI Shixun, JIN Sui* , SUN Xianmeng 2024, 49(22): 18-24.  DOI: 10.16638/j.cnki.1671-7988.2024.022.004 Abstract ( )   PDF (1188KB) ( )   In order to extract road elements from point cloud data and provide a basis for the digitization of road infrastructure and the production of high-precision maps, an automatic extraction process is developed in this paper by combining ground segmentation and pavement extraction. Firstly, the ground segmentation is carried out, and the algorithm is used to preprocess the point cloud data to realize the effective separation of the ground point cloud and the non-ground point cloud. Secondly, the seed points are selected, and the seed points representing the typical pavement characteristics are selected based on the intelligent algorithm of the geometric characteristics of the point cloud. Finally, the regional growth algorithm is used to automatically extract the pavement, which solves the problem of over-segmentation of the growth algorithm. References | Related Articles | Metrics

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Design and Development Method for a Medium and Heavy Truck Products Matching ADAS Electronic Maps ZOU Xinghui 2024, 49(22): 25-28.  DOI: 10.16638/j.cnki.1671-7988.2024.022.005 Abstract ( )   PDF (627KB) ( )   The electronic map of the advanced driving assistance system (ADAS) extracts slope, curvature, heading and other data from map data, and provides necessary road traffic environment perception information for active safety and assisted driving through comprehensive decisionmaking. This article through the development process of ADAS electronic map products described, clear its design stage, especially to pay attention to the hardware positioning module selection and software in the electronic horizon provider (EHP) parser algorithm selection specific requirements, at the same time the software and hardware need to have a reasonable computing power of the system on chip (SoC), with filtering global positioning system (GPS) positioning information and location information backtracking function to make clear requirements. Product hardware through functional testing, bench testing, real vehicle road testing to its system network performance and key functions of a comprehensive verification. References | Related Articles | Metrics

Design and Research

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Simulation Analysis of Chassis Spring Plate of Fire Fighting Trolley under Variable Load WU Guangzheng, WANG Danling, QIAO Liang, YUE Lixin, KONG Dexi, XING Mingming* 2024, 49(22): 29-32.  DOI: 10.16638/j.cnki.1671-7988.2024.022.006 Abstract ( )   PDF (1303KB) ( )   In view of the poor working stability and high undercarriage failure frequency of fire fighting trolley under harsh environment, a simulation analysis method of fire fighting trolley undercarriage spring plate under variable load is established considering the different response characteristics of fire fighting trolley spring plate under variable load. Based on the finite element analysis theory, the flow of spring plate simulation analysis is given. Considering the influence of spring plate material, spring plate size and bolt installation position on the stress state of spring plate under variable load, the finite element stress-strain analysis is carried out. The simulation results show that the variable load is proportional to the stress level and deformation amount of the spring plate, and the material, size and bolt installation position of the spring plate are important factors affecting the stress level and deformation amount of the spring plate. The simulation results have important significance for effectively reducing spring plate and improving the safety and stability of the trolley. References | Related Articles | Metrics

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Second-order Jitter Optimization Control of the Transmission Shaft of a Vehicle Type DENG Xin1,2, XU Gaoxin1,2 , CHEN Qingshuang1,2 , SHEN Xuefeng1,2 , LUO Yichao1,2 2024, 49(22): 33-36,53.  DOI: 10.16638/j.cnki.1671-7988.2024.022.007 Abstract ( )   PDF (1579KB) ( )   With the continuous increase of power and torque of the power system, the problem of second-order jitter of the cross universal-joint transmission shaft becomes more and more prominent. According to the calculation formula of the additional bending moment of the transmission shaft, the larger the angle of the universal joint, the larger the additional bending moment, the larger the vehicle jitter. In this paper, the second-order vibration of the transmission shaft under the condition of large throttle acceleration at the start of a vehicle is taken as the research object. The real test and analysis of the larger vibration location are the second middle support of the transmission shaft and the main reducer housing of the rear axle. Further analysis shows that the angle between the transmission shaft α3 and α4 are larger. According to the analysis results, two optimization schemes are proposed, such as adjusting the angle of the transmission shaft and reforming the constant velocity universal joint, and the optimization effect of the whole vehicle is obvious. The research content has strong engineering significance for optimizing the second order jitter problem of the transmission shaft. References | Related Articles | Metrics

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Design of Switch Converter Based on Incremental PID Correction Technology SONG Anran, LIU Jie 2024, 49(22): 37-43.  DOI: 10.16638/j.cnki.1671-7988.2024.022.008 Abstract ( )   PDF (1072KB) ( )   In order to solve the problems of large volume and large fluctuation of output voltage in traditional power supply, the switching converter control scheme based on incremental proportional-integral-differential (PID) correction is given. Because the push-pull topology does not need to consider magnetic saturation problem in small and medium power situations, the push-pull topology is used as the main power conversion unit in the scheme. Firstly, the working principle of push-pull topology is described. Based on this, the power conversion circuit of push-pull topology and the cyclic protection circuit are designed, and the control flow of each switch current overload and over current circuit is given in the middle period to realize the fast protection under the conditions of overload and short circuit. Then, in order to reduce the loss during the operation of the transformer, the design is carried out from the angle of magnetic electromotive force, and the design method of the main key parameters of the converter is given. In the control scheme, the output voltage of the converter is taken as the control output, and the incremental PID output equation is derived based on the position PID, and the workflow of the system software is designed. Finally, the prototype is designed and the experimental data are obtained to verify the accuracy of the theoretical design. References | Related Articles | Metrics

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Analysis and Optimization of 8×4 Lightweight Urban Dump Truck Superstructure WANG Yangang1 , WEI Renbao2 , ZHANG Kai3 2024, 49(22): 44-48.  DOI: 10.16638/j.cnki.1671-7988.2024.022.009 Abstract ( )   PDF (1767KB) ( )   The superstructure of the 8×4 lightweight urban dump truck is investigated as the research object, undergoing structural rigidity and strength verification analysis using finite element analysis methods under typical operating conditions such as lifting, turning, and twisting. The results indicate that when fully loaded with 50 t, the dump body experiences significant overall deformation and exhibits high-stress regions under various conditions, posing risks of bulging failure and yield failure. Under lifting conditions, the maximum equivalent stress in the front region of the under frame exceeds the allowable stress, the structural strength fails to meet design requirements. Combined analysis results, optimizations are implemented on both the dump body and under frame through structural improvements and dimensional adjustments. The maximum deformation of the dump body is reduced from 52.2 mm to 14.8 mm, and the maximum stresses of both the dump body and under frame generally within the allowable stress range. The optimized superstructure of the dump truck meets the corresponding rigidity and strength requirements. References | Related Articles | Metrics

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A Brief Discussion on the Development of Electric Vehicle Tires YANG Zhenhuan, LI Qiukui, LI Liangshuai, ZHOU Zhenzhong, GU Qiancheng 2024, 49(22): 49-53.  DOI: 10.16638/j.cnki.1671-7988.2024.022.010 Abstract ( )   PDF (1325KB) ( )   Electric vehicles have continued to grow rapidly in recent years, with a stable market share of over 30%. Various tire companies have also launched specialized tires for electric vehicles. Electric vehicles have significant differences compared to traditional fuel vehicles: the increase in vehicle weight, changes in power forms and energy replenishment methods, and these differences bring many challenges to the tire development of electric vehicles. In response to their differences, this article analyzes the complex requirements for the performance of electric vehicle tires: low rolling resistance, low noise, high load capacity, high tire pressure, good wear resistance, good wet and dry grip performance, lightweight, and briefly describes the development and testing process of electric vehicle tires. To improve the accuracy of performance definition, the fuzzy analytic hierarchy process (FAHP) is proposed to determine the priority of various performance parameters of tires, and the tire test results are comprehensively evaluated and selected using FAHP. Finally, the key performance achievement methods of electric vehicle tires are analyzed and discussed. References | Related Articles | Metrics

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Optimization Design of Front Engine Room Combination Bracket Assembly Based on Battery Electric Vehicle XIANG Zhaoyuan, YANG Jinxiu, PAN Hanqin 2024, 49(22): 54-60.  DOI: 10.16638/j.cnki.1671-7988.2024.022.011 Abstract ( )   PDF (2228KB) ( )   Aiming at the differences in front engine room layout between pure electric and fuel vehicles, a front engine room combination bracket assembly suitable for pure electric vehicle front engine room layout scheme is designed, a mechanical model is established, and computer aided engineering (CAE) analysis is carried out to optimize the combination bracket assembly through material and structural improvements. The results show that under the same layout scheme, the performance of the steel composite bracket assembly is difficult to meet the performance requirements. After material and structural optimization, the aluminum composite bracket assembly can better meet the performance requirements. Compared to the steel composite bracket assembly, the aluminum composite bracket assembly can achieve a weight reduction of about 2.06 kg, with a weight reduction rate of 44.2%, and a significant lightweight effect. Excluding costs such as molds, tooling, and fixtures, the cost of parts is reduced by approximately 3.36 yuan per piece. It has mass production conditions and provides a good typical case for the lightweight design of composite bracket assemblies for pure electric vehicle models. References | Related Articles | Metrics

Testing and Experiment

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One-dimensional Numerical Simulation and Influence Analysis for Engine Cooling System REN Zhijun1,2 , SUN Yanwei1,2 , WANG Fengjuan*1,2,3 , LIU Wentao1,2 , LI Yong1,2 , WANG Junran1,2 , CHEN Peng1,2 2024, 49(22): 61-65，88.  DOI: 10.16638/j.cnki.1671-7988.2024.022.012 Abstract ( )   PDF (2095KB) ( )   The engine cooling system is matched with the overall vehicle development, and various car manufacturers have different water parts flow resistance characteristics, pipe layouts, and water outlet positions, which greatly affect the water flow distribution. In order to explore the influence of various variables on the system-level water flow, this article conducts relevant simulation research. By building a one-dimensional simulation model of the cooling system to obtain the water flow of each water accessory, the article analyzes the influence of each variable on the distribution of branch water flow. Using the Flowmaster software, the article builds a one-dimensional simulation model of the cooling system with a single thermostat and a dual thermostat, and compares the effects of single and dual thermostats on the cooling system's water flow distribution. It also validates the accuracy of the simulation model and the rationality of the simulation method by comparing the measured water flow of single and dual thermostats. Through this model, the article verifies the influence of pipe length, inner diameter, bending number, and water inlet and outlet positions, etc., on branch water flow, providing reference for subsequent cooling system branch design and homologation. References | Related Articles | Metrics

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Research on the Influence of Suspension KC Characteristics on Vehicle Stability under Extreme Conditions WU Liguang1,2, KONG Xianwei2 , LIU Xiang3 , LI Xin2 2024, 49(22): 66-72.  DOI: 10.16638/j.cnki.1671-7988.2024.022.013 Abstract ( )   PDF (1719KB) ( )   The stability of the vehicle under extreme conditions is one of the crucial indicators for evaluating its performance. Although modern electronic control systems play a significant role in enhancing vehicle stability under extreme conditions, but the suspension kinematic and compliance (KC) characteristics, as a fundamental aspect of the vehicle's mechanical design, remain vital for ensuring stability under various extreme conditions. This paper investigates the impact of suspension KC characteristics on vehicle stability under extreme conditions. Initially, it explores evaluation methods for stability under extreme conditions. Subsequently, using a passenger car as an example,the vehicle dynamics model is established, and sensitivity analysis is conducted to examine how different suspension KC characteristics affect various stability indicators under extreme conditions. Lastly, the stability of the vehicle model under extreme conditions is optimized, yielding favorable results. The research findings of this paper can enhance vehicle development efficiency, provide support for the development and evaluation of vehicle stability under extreme conditions, and offer important theoretical evidence and practical guidance for chassis design and tuning. References | Related Articles | Metrics

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Research on Factors Affecting Performance of AMT Brake on Commercial Vehicle HE Fayao 2024, 49(22): 73-77.  DOI: 10.16638/j.cnki.1671-7988.2024.022.014 Abstract ( )   PDF (2302KB) ( )   Automaticed mechanical transmission (AMT) is a transmission device that can automatically shift gears according to the operating state of the vehicle and the road environment of the vehicle. The AMT commonly used in commercial vehicles isshifting powered by compressed air, and the transmission control unit (TCU) controls the solenoid valve according to the software logic to realize the disengage and engage of the clutch and the gearshifting of the gearbox. The synchronization process of commercial vehicle AMT shift is automatically completed by the gearbox, and the mainstream commercial vehicle AMT at home and abroad adopts the dog clutch structure with simpler structure, lower cost and more reliable quality. Compared to synchronizers, the dog clutch structure requires a transmission brake (TB) to synchronize the process during upshift. This paper analyzes the factors affecting the performance of AMT TB, and designs a specific experimental test method to test the effects of each factor on the performance of TB on the experimental test bench. The test result has shown that the diameter of TB friction plates affects the braking rate, and the larger the diameter, the greater the braking rate; The number of TB friction pads has an impact on response time and braking rate. The more the number, the faster the response time and the greater the braking rate; The TB airway diameter affects the response and exit time, and the larger the airway diameter, the faster the response and exit time; The air source pressure affects the braking rate of TB, and the greater the pressure, the greater the braking rate. The conclusions of this paper provide support for the design and calibration work of AMT TB on commercial vehicle References | Related Articles | Metrics

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Vehicle Reliability Estimation Technique Based on Improved Artificial Fish Swarm Algorithm SUN Wenzheng 2024, 49(22): 78-82.  DOI: 10.16638/j.cnki.1671-7988.2024.022.015 Abstract ( )   PDF (1211KB) ( )   In the process of component development, reliable estimation of component reliability is crucial. The Weibull distribution is widely used to simulate failure distributions, making parameter estimation of the Weibull distribution essential for component reliability prediction and analysis. To address this, this paper proposes a novel Weibull distribution estimation method based on an improved artificial fish swarm algorithm for vehicle component reliability assessment. Firstly, the paper theoretically constructs a maximum likelihood estimation model for the Weibull distribution and provides a detailed introduction to the relevant model. Subsequently, in light of the low efficiency and suboptimal quality inherent in the original artificial fish swarm algorithm, improvements are made by introducing Levy flight strategy and adaptive adjustment of perceptual distance. Lastly, the improved artificial fish swarm algorithm is employed for Monte Carlo simulation experiments to compare and analyze the fitting effects of Weibull distribution parameters. The results indicate that for Weibull distribution parameter estimation, the proposed improved artificial fish swarm algorithm more accurate parameter estimations compared to other metaheuristic algorithms, thereby providing scientifically effective guidance for automotive component development and reliability assessment. References | Related Articles | Metrics

Process·Materials

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Reliability Design of Machining Fixture for Valve Rocker Shaft Support Parts LIU Xiaojing 2024, 49(22): 83-88.  DOI: 10.16638/j.cnki.1671-7988.2024.022.016 Abstract ( )   PDF (1224KB) ( )   Regarding to the issues that valve rocker shaft support structure is relatively complex, machining technology requirements are high and part needs to be machined on more surfaces, a specialized machining fixture is designed to meet the mass production requirements by the valve rocker shaft support part analyzing, processing specifications designing and fixture development. In terms of process, process design has been carried out based on machine tool selection and strict standards. In terms of fixture design, a plane with two V-blocks is used in this fixture to position and limit six degrees of freedom, two rotary pressure plates and movable V-block handles are used to clamp the workpiece, In this way, turnover and vibration can be prevented, part machining requirements and precision control on surface processing are better solved, and part machining reliability is guaranteed. References | Related Articles | Metrics

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Application of PHC Honeycomb Sandwich Composite Material in Spoiler of Heavy Duty Truck REN Demai 2024, 49(22): 89-92.  DOI: 10.16638/j.cnki.1671-7988.2024.022.017 Abstract ( )   PDF (2688KB) ( )   In order to study the low wind resistance, lightweight material guide cover, improve the fuel economy, power performance, energy saving and emission reduction of heavy duty trucks. Based on a model of Shaanxi truck, the concept a surface and structural design of large guide cover are completed, comparing the weight of large guide cover of different materials, and the weight reduction of polyurethanes composites (PHC) material guide cover is obvious. Through computer aided engineering (CAE) simulation, the constraint mode, strength and stiffness meet the requirements. PHC honeycomb sandwich composite production process is mature, can be applied in heavy truck guide cover and other external accessories. References | Related Articles | Metrics

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Fracture Failure Analysis on Transmission Output Shaft ZHAO Jun, JIA Shichuan* , ZHANG Na 2024, 49(22): 93-95,100.  DOI: 10.16638/j.cnki.1671-7988.2024.022.018 Abstract ( )   PDF (3238KB) ( )   The transmission output shaft broke during the comprehensive durability test of a certain vehicle. Via chemical composition detection, microstructure observation, fracture morphology and energy spectrum analysis, the fracture causes of transmission output shaft made of 20CrMnTi are analyzed. The results show that during the casting and solidification process of raw materials, chromium (Cr) and manganese (Mn) elements converge in the dendrites at a slow diffusion rate, and the solute elements in the liquid phase region cause element segregation at the grain boundaries, thereby precipiting Cr and Mn compounds and weakening the grain boundaries. Under the comprehensive action of internal stress and phase transition stress generated by subsequent heat treatment process, micro-cracks occur on the weakened grain boundaries. When subjected to alternating load, the microcracks gradually spread inward along the original austenite grain boundary, and finally lead to the fracture of the parts. Users can learn from the direction of failure analysis introduced in this paper to control the occurrence of such failure problems at the user end. References | Related Articles | Metrics

Automobile Education

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The Teaching Reform and Practice of "Two Into-Four Transformations-One Output" in the Course of Hydraulic and Pneumatic Transmission LV Huimin, WEI Hongmei 2024, 49(22): 96-100.  DOI: 10.16638/j.cnki.1671-7988.2024.022.019 Abstract ( )   PDF (1011KB) ( )   Combined with the characteristics of Hydraulic and Pneumatic Transmission course, to change the traditional teaching students passive learning and unable to highlight the present situation of the comprehensive ability training, the article to cultivate students' application ability and innovation ability, pay attention to students' comprehensive development for the classroom teaching goal, put forward the "two four modernizations output" teaching mode, and carries out a series of teaching reform and practice. The course team deepens the cooperation between school and enterprise, adopts the "enterprise mentor into the classroom, enterprise project into the classroom", makes the "two in and one out" cultivation path of "student achievements out of the classroom", and strengthens the cultivation of students' application ability and innovation ability. The "integration of four modernizations" as a means to promote the efficient realization of learning goals. The practice shows that students' enthusiasm for learning has been significantly improved, and the classroom atmosphere is more active. While students master theoretical knowledge, their independent learning ability, analysis and problem solving ability and innovation ability have been improved in an allround way References | Related Articles | Metrics

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Exploring the Path of Ideological and Political Construction in New Energy Vehicle Majors in Higher Vocational Education WANG Bing, HU Zhongxia 2024, 49(22): 101-105.  DOI: 10.16638/j.cnki.1671-7988.2024.022.020 Abstract ( )   PDF (914KB) ( )   Carrying out ideological and political education courses is a necessary condition for constructs a plan for ideological and political education in new energy vehicle professional courses in vocational colleges, and proposes a comprehensive design path for ideological and political education in courses from a professional perspective, providing policy references for improving the effectiveness of ideological and political education in courses and cultivating high-quality talents. cultivating technical and skilled talents, a necessary requirement for high-quality professional development, and an important measure to implement moral education. But with the reform and implementation of ideological and political education in the curriculum, problems such as the coordination of ideological and political education subjects, duplication of ideological and political resources, integration of teaching methods, and assessment and evaluation mechanisms have become increasingly prominent. This article analyzes the current situation and difficulties of ideological and political education in new energy vehicle courses in vocational colleges, explores the path of ideological and political education in new energy vehicle courses through practice and research, References | Related Articles | Metrics

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Research on the Construction of "Three Dimensions and Four Integration" Granulated Teaching Resources Based on the Concept of OBE －A Case Study of Intelligent Network Integrated Vehicle Test Course XU Xiaoyu, TIAN Gaohua 2024, 49(22): 106-110.  DOI: 10.16638/j.cnki.1671-7988.2024.022.021 Abstract ( )   PDF (1136KB) ( )   Against the backdrop of first-class courses, course construction should start from the fundamental goal of fostering virtue through education, adopting advanced teaching concepts,scientific teaching methods, and reasonable academic evaluation forms. The article explores the construction of comprehensive testing course resources for intelligent connected vehicles based on the outcome-based education (OBE) concept, focusing on student learning outcomes, establishing a three dimensional goal of "knowledge, ability, and literacy". Through upgrading course standards and reconstructing course content, it continuously improves the construction of course resources, integrating elements of "ideological and political education, innovation and entrepreneurship, industry, and disciplines" during the resource library construction process. The teaching resources designed in the article follow the construction logic of "integrated design, structured courses, granular resources", providing comprehensive and systematic course materials and learning resources. The construction of teaching resources is developing towards digitization, project-based, and internationalization, covering the professional knowledge and cutting-edge technologies required for comprehensive testing of intelligent connected vehicles, and enhancing students' problem-solving and innovation capabilities. This research provides new ideas and methods for the construction of teaching resources for comprehensive testing courses of intelligent connected vehicles, thereby cultivating new quality skills talents with the concept of "ecological civilization", the responsibility of "serving the country through science and technology", and the spirit of "great national craftsmen". References | Related Articles | Metrics

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Exploration and Practice of Improving the Quality of Undergraduate Graduation Design of School-enterprise Joint under CDIO Mode －Taking Automotive Engineering Major as an Example LIU Xiaoang, CHEN Guang 2024, 49(22): 111-115.  DOI: 10.16638/j.cnki.1671-7988.2024.022.022 Abstract ( )   PDF (1112KB) ( )   Under the background of new engineering construction, universities should actively seek to cultivate high-quality engineering talents with innovative spirit and practical ability, so as to adapt to the pace of technological innovation and meet the growing demand for talents in enterprises. As a key part of the university education system, graduation design is very important to cultivate students' comprehensive quality and engineering practice ability. In view of the current problems existing in the teaching process of undergraduate graduation design of school-enterprise joint, this paper proposes a conceive, design, implement and operate (CDIO) oriented teaching reform for improving the quality of graduation design. Taking the graduation design of school-enterprise joint for automotive engineering majors as an example, this paper explores and practices the approach and mechanism of improving the quality of undergraduate graduation design, which provides reference and inspiration for introducing CDIO education and teaching concepts into the graduation design of school-enterprise joint for engineering majors. References | Related Articles | Metrics

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Exploration of the Upgrade and Transformation Path of the Training Mode for Automotive Service Engineering Majors under the Traction of the "New Four Modernizations" WANG Hongxia, WANG Xing* 2024, 49(22): 116-120.  DOI: 10.16638/j.cnki.1671-7988.2024.022.023 Abstract ( )   PDF (1273KB) ( )   As the automotive industry enters the era of "New Four Modernizations", there is an urgent demand for talents with the latest knowledge system and professional abilities. The current talent training model for automotive service engineering in domestic universities is still based on the traditional automotive knowledge system, which can no longer meet the needs of the automotive industry transformation. Based on the changes in talent demand in the automotive industry brought about by the "New Four Modernizations" industrial transformation, this article explores the upgrading and transformation measures of the automotive professional curriculum training system, and establishes a "Three Ones" collaborative innovation professional talent training model: constructing a professional curriculum system that faces the forefront of industrial development and connects with work tasks; Transforming the teacher centered professional teaching model into a student-centered approach; Exploring a new model of school enterprise cooperation for the automotive service engineering major, providing reference and guidance for talent cultivation in applied undergraduate colleges and universities. References | Related Articles | Metrics

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Exploration of Curriculum Construction for Intelligent Connected Vehicle Technology Based on OBE Concept SHI Peiji, WEI Kaixin* , SHEN Rongwei 2024, 49(22): 121-126.  DOI: 10.16638/j.cnki.1671-7988.2024.022.024 Abstract ( )   PDF (1231KB) ( )   Under the background of professional certification and undergraduate education teaching improvement. On this basis, the paper introduces the construction idea of the Intelligent Connected Vehicle Technology course based on OBE concept from four aspects: formulating course objectives, reconstructing teaching content, optimizing teaching design and establishing continuous improvement mechanism. This paper focuses on four practical measures of teaching reform, including the optimization of teaching resources and environment, curriculum content reconstruction implementation, the reform of mixed teaching mode and the adjustment of curriculum evaluation mode. This paper analyzes the effect of teaching reform and the matters to be improved, and finally puts forward 6 suggestions and measures based on OBE teaching from the aspects of concept preaching, teacher training, school-enterprise cooperation, teaching reform, supervision mechanism and guarantee mechanism. This paper can provide reference for teachers to carry out OBE concept curriculum construction. audit and evaluation, in order to comprehensively improve the quality of talent training, this paper carries out research on curriculum construction based on the concept of outcome-based education (OBE). Firstly, it reviews the basic theory of OBE concept, introduces the definition and the logical relationship among the three core elements of OBE: student-centered, output-oriented and continuous References | Related Articles | Metrics

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Exploring on Virtual Simulation Experiment Teaching Reform in Vehicle Engineering Courses －Taking the Automotive Vibration and Noise Control Course as an Example ZHAO Dengfeng1,2, ZHAI Hongfei1,2, HOU Junjian1,2 , ZHANG Liu2 , FU Zhijun1 2024, 49(22): 127-130,150.  DOI: 10.16638/j.cnki.1671-7988.2024.022.025 Abstract ( )   PDF (1517KB) ( )   Effectively integrating automotive virtual simulation experiments into the course teaching process is an important means to improve the teaching quality of automotive engineering courses, and it is also a professional problem that teachers need to solve urgently. This paper takes the course of Automotive Vibration and Noise Control in the vehicle engineering major of Zhengzhou University of Light Industry as an example, introduces the positioning and objectives of the course, and addresses the problems found during the teaching of the course, such as boring theoretical learning, outdated teaching hardware facilities, and disconnection between education and production. By optimizing course content, improving course teaching modes, and upgrading course evaluation systems, teaching reform measures have stimulated students' learning enthusiasm and achieved good teaching reform results. This paper can provide reference for better integrating virtual simulation experiments into professional course teaching in the future. References | Related Articles | Metrics

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Practical Research on Application of "Micro-Scientific Research" Mode to the Course of Automotive Parts Design ZHANG Huanhuan, XU Sha, ZHU Lijing 2024, 49(22): 131-134.  DOI: 10.16638/j.cnki.1671-7988.2024.022.026 Abstract ( )   PDF (1284KB) ( )   With the development of disciplines and the progress of society, higher requirements are put forward for the cultivation of college students' innovative ability, and the course teaching needs to be constantly updated. The teaching mode of "micro-scientific research" adheres to the idea of integrating science and education with scientific research feeding teaching, and adheres to the teaching concept of student-centered and ability oriented, so that students can do, learn by doing, and integrate knowledge and action in learning, so as to comprehensively improve their knowledge, ability and quality level. Starting with the analysis of the problems existing in the cultivation of college students' innovation consciousness, this paper constructs the theoretical basis of the teaching mode of "micro-scientific research", and then applies it to the course of Automobile Parts Design. Through practical research on the topic source, activity time arrangement and activity evaluation of the teaching mode of "micro-scientific research". Through the good results of the course,the validity of the teaching mode of "micro-scientific research" is verified. References | Related Articles | Metrics

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Exploration and Practice of Curriculum Ideology and Politics of Automobile Electrical Equipment and Maintenance DONG Zhulin 2024, 49(22): 135-139.  DOI: 10.16638/j.cnki.1671-7988.2024.022.027 Abstract ( )   PDF (1156KB) ( )   With the continuous improvement of higher education quality requirements of the state, curriculum ideology and politics as an important way to cultivate students' socialist core values and moral qualities have been paid more and more attention. This paper takes the course of Automotive Electrical Equipment and Maintenance as the carrier, integrates the ideological and political content with the professional course, digs deeply into the ideological and political elements of the course, builds the teaching syllabus integrating the ideological and political elements, demonstrates the implementation process of the course ideological and political elements in the course through two classroom teaching cases, and designs the key points of the ideological and political elements according to the content characteristics of each chapter. The methods of integrating ideological and political elements and the educational goals to be achieved are discussed. In the future, it is necessary to continue to deepen the ideological and political teaching reform of the curriculum, continue to invest resources, carefully plan and apply it to practice, and truly root the ideological and political elements in the hearts of students, and ultimately cultivate high-quality professionals with feelings of family and country, patriotism, social responsibility and so on. References | Related Articles | Metrics

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Practice of Designing a Four-stage Teaching Mode Based on the Rain Classroom －Taking the New Energy Automobile Professional Course as an Example HUANG Jinjiao, SHEN Rongwei, CHANG Yu 2024, 49(22): 140-144.  DOI: 10.16638/j.cnki.1671-7988.2024.022.028 Abstract ( )   PDF (1330KB) ( )   Vocational education is different from general education, which requires an applied, humanistic and operational teaching mode. At present, the teaching of new energy vehicle courses in vocational colleges and universities is mostly based on offline teaching, the use of new energy vehicle teaching equipment is single type, and students' attention is difficult to concentrate stably. In order to solve the above problems, with the help of the rain classroom platform, a hybrid fourstage teaching mode of online and offline based on vocational education informatization and aiming at the modernization of education has been designed, and good teaching results have been achieved in the teaching practice. References | Related Articles | Metrics

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Practice of Independent Assurance System for Manufacturing Quality in New Energy Commercial Vehicle Industry HE Weiwei, LIU Peng, LU Xinhua 2024, 49(22): 145-150.  DOI: 10.16638/j.cnki.1671-7988.2024.022.029 Abstract ( )   PDF (1635KB) ( )   In the current fiercely competitive market environment of manufacturing, manufacturing quality has become the key to the survival and development of enterprises. In order to improve product quality and reduce defect rates, this paper mainly explores the practice and application of manufacturing quality independent assurance system in enterprises. By analyzing the principles and methods of building quality independent assurance system, this paper provides detailed introduction to the specific practices of enterprises in quality management systems, process control, employee training, and continuous improvement. The practical results show that implementing the manufac turing quality independent assurance system can effectively improve product quality, enhance the core competitiveness of enterprises, and lay solid foundation for sustainable development of enterprises. References | Related Articles | Metrics

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Road Traffic Safety Assessment in Tibet Based on Improved Entropy Weight-TOPSIS Method CHEN Yufei, ZHENG Xiongfei, LI Shizhong 2024, 49(22): 151-156.  DOI: 10.16638/j.cnki.1671-7988.2024.022.030 Abstract ( )   PDF (1291KB) ( )   Research on road traffic safety in Tibet can effectively reduce the number of traffic accidents in Tibet, reduce economic losses, and promote the work of ensuring people's livelihood. This paper uses the improved entropy weight-technique for order preference by similarity to an ideal solution (TOPSIS) method to construct the road traffic safety evaluation index system from six aspects: 100 000 population death rate, 10 000 vehicle death rate, 1 000 km death rate, average death rate per accident, fatality rate, and death rate per 100 million gross regional product to evaluate the road traffic safety in Tibet. The results show that there is a strong correlation between road traffic safety level and economic factors such as regional gross domestic product, motorization degree and road network length, and the current situation of road traffic safety in urban areas of Tibet also has great differences. Based on this, combined with the evaluation results of road traffic safety in Tibet's urban areas, we strive to use relevant data to describe the current situation of road traffic safety in Tibet's urban areas, and provide a strong basis for the relevant departments to introduce traffic safety measures. References | Related Articles | Metrics