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30 September 2025, Volume 50 Issue 18 Previous Issue   
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New Energy Vehicle
Design and Research
Process·Materials
Automobile Education
Standards·Regulations·Management


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New Energy Vehicle

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Research on the Comprehensive Attractiveness Index of Electric Vehicle for the Overseas Passenger Car Market FENG Xingya, LI Lin, LI Xinyu, ZHU Jiefeng* 2025, 50(18): 1-7.  DOI: 10.16638/j.cnki.1671-7988.2025.018.001 Abstract ( )   PDF (716KB) ( )   In order to evaluate the developmental potential of electric vehicle (EV) for the overseas country or region passenger car market, the star-class assessment system of the overseas passenger car market "EV comprehensive attractiveness index (ECAI)" is proposed in this article for the first time. Comprehensively considering the current technology, policy and regulations, infrastructure and climate and environment factors, the star-class assessment system of EV attractiveness index is modified basing on the statistical data of oil price and residential electricity price in the overseas country (capital city) or region. A higher star rank of ECAI for the overseas country or region indicates the greater developmental potential of EV in the market. Based on this evaluation system, overseas key countries or regions are categorized as follows: six countries or region including Norway belong to the five-star rank, four countries including Australia belong to the four-star rank,twenty-one countries including Indonesia belong to the three-star rank, fourteen countries including Mexico belong to the two-star rank, five countries including Russia belong to the one-star rank. This study provides valuable references for Chinese branded automakers of EV "internationalization" expansion, thereby supporting the high-quality "internationalization" of Chinese branded automakers. References | Related Articles | Metrics

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Research on Energy Recovery in Rear-wheel-drive Battery Electric Vehicles JIAO Rujian1 , YAO Zhibin2* , ZHI Jinning2 2025, 50(18): 8-14,30.  DOI: 10.16638/j.cnki.1671-7988.2025.018.002 Abstract ( )   PDF (2643KB) ( )   To investigate the frequent switching issues in energy recovery modes and the challenges in simultaneously optimizing braking performance and energy recovery efficiency for rear-wheeldrive battery electric vehicles, this study conducts a comprehensive parametric compatibility analysis focusing on core powertrain components of a specific pure electric vehicle. An adaptive energy recovery strategy employing back propagation (BP) neural network algorithm is designed to accommodate diverse driving conditions, while fuzzy control theory is integrated to identify the optimal balance between braking performance and energy recovery efficiency. The proposed control strategy underwent rigorous validation through a co-simulation platform combining Simulink and AVL-Cruise. Simulation results conclusively demonstrate that the developed strategy enhances energy recovery efficiency by 1 percentage point during braking while maintaining vehicle driving smoothness, accompanied by a 0.1 percentage point reduction in state of charge (SOC) fluctuation, thereby achieving the optimal equilibrium between braking performance and energy recovery efficiency. References | Related Articles | Metrics

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Research on the Empowerment of New Quality Productive Forces for the Development of the New Energy Vehicle Market in Shiyan PAN Ting1 , HUANG Yongchang1 , WANG Bing2 2025, 50(18): 15-19.  DOI: 10.16638/j.cnki.1671-7988.2025.018.003 Abstract ( )   PDF (686KB) ( )   Under the guidance of the "dual carbon" goals, the new energy vehicle market in Shiyan city has developed rapidly, but it still faces problems such as insufficient core technological innovation, inadequate industrial chain coordination, and restricted market promotion. Based on the theory of new quality productivity and in combination with market research data, this article analyzes the enabling effects of four major paths-technology-driven, industrial synergy, basic support, and green transformation-on the new energy vehicle market in Shiyan. The results show that the proposal of new quality productivity provides theoretical support and practical paths for the high-quality development of the new energy vehicle market in Shiyan. References | Related Articles | Metrics

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Research on the Attenuation Mechanism of Fuel Cell Components and Countermeasures under Different Operating Conditions YI Yafei, CAO Jidong, WANG Nan, LI Peng, HAN Zhu, LI Feiqiang 2025, 50(18): 20-25.  DOI: 10.16638/j.cnki.1671-7988.2025.018.004 Abstract ( )   PDF (972KB) ( )   Fuel cell engines face the issue of insufficient lifetime in practical applications, which severely hinders the commercialization process of fuel cell vehicles, especially under complex and varying operating conditions where performance degradation is more pronounced. This article analyzes the physical and chemical properties and degradation mechanisms of key components in fuel cells such as catalysts, proton exchange membranes, carbon paper, and bipolar plates. It explores the impact of these factors on the durability of hydrogen fuel cell engines and proposes corresponding optimization directions for high-durability materials. By combining the analysis of system operating conditions (such as open circuit/idle, load changes, start-stop conditions, and high load), the article identifies the degradation characteristics of key fuel cell materials during practical application. It suggests optimization control strategies for fuel cell systems, and promotes the widespread application of fuel cell vehicles. References | Related Articles | Metrics

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Design Optimization and Verification of Thermal Management System for New Energy Commercial Vehicles GUAN Zeqiang 2025, 50(18): 26-30.  DOI: 10.16638/j.cnki.1671-7988.2025.018.005 Abstract ( )   PDF (2343KB) ( )   With the global energy structure transition and the advancement of carbon neutrality goals, thermal management systems for new energy vehicles have become core technologies to enhance industrial competitiveness and achieve sustainable development. This study focuses on the thermal management system of new energy commercial vehicles, establishing three independent subsystems: drive system cooling, power battery thermal management, and passenger compartment air conditioning, while proposing a multi-mode coordinated control strategy. Experimental validation under extreme summer and winter environmental conditions demonstrated that the system design meets performance requirements, but revealed issues of excessive energy consumption. To address this, multi-dimensional optimization strategies are proposed. The research findings provide theoretical and technical support for engineering applications and energy efficiency optimization of thermal management systems in new energy vehicles. References | Related Articles | Metrics

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Discussion on Optimization Scheme of Electromagnetic Compatibility Design in New Energy Laboratories ZHANG Bo, WANG Manman, YUAN Chen, XIA Yu 2025, 50(18): 31-35.  DOI: 10.16638/j.cnki.1671-7988.2025.018.006 Abstract ( )   PDF (2789KB) ( )   This study proposes a systematic electromagnetic compatibility (EMC) design optimization methodology for multi-device collaborative testing in new energy laboratories. By categorizing laboratory equipment types and their EMC characteristics, the research identifies common-mode (CM)/differential-mode (DM) interference sources and propagation paths, establishes typical test setups, and utilizes spectrum analyzers with near-field probes to locate interference sources. Quantitative assessments of conducted interference and radiated emissions are conducted. Key improvements include: increasing the spacing between high-voltage and sensitive equipment, upgrading controller area network (CAN) bus anti-interference capabilities, and standardizing grounding methods. Post-optimization improvements demonstrate reduced communication error frame rates, lower equipment failure rates, and decreased conducted CM interference amplitudes. The study establishes a standardized EMC design workflow encompassing layout planning, harness selection, and validation testing. This methodology provides a replicable framework for EMC design in new energy powertrain, battery, and thermal management laboratories, enhancing testing efficiency and supporting reliability advancements in the new energy vehicle industry chain. References | Related Articles | Metrics

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Study on the Impact of Different Control Modes on Dynamic and Static Performance of Methanol-fueled Range Extenders REN Yafeng1,2,3 , LUO Yusheng1,2,3* , PAN Yige2 2025, 50(18): 36-41.  DOI: 10.16638/j.cnki.1671-7988.2025.018.007 Abstract ( )   PDF (1429KB) ( )   This study proposes a dual closed-loop control system based on a 7 L methanol range extender, establishing two operational modes: torque control (TC) mode with engine torquegenerator speed regulation, and speed control (SC) mode with engine speed-generator torque comprehensive characteristics from four dimensions: steady-state speed characteristics, transient speed response, steady-state power output characteristics, and external characteristic curves. The experimental results show that in terms of steady-state control accuracy, the TC mode exhibits superior control precision, with its speed fluctuation rate reduced by up to 46.7% compared to the SC mode. Under transient load conditions, the speed deviation of the TC mode is reduced by 21% to 71% compared to the SC mode, and the adjustment time is shortened by more than 60%. On the other hand, the SC mode demonstrates better stability during continuous power output, with its power fluctuation rate reduced by up to 86.1% compared to the TC mode. Additionally, the comparison of external characteristic curves shows that the maximum power output of the SC mode at various speed points is significantly lower than that of the TC mode, with the power output difference exceeding 30% across the entire speed range. regulation. Through a self-developed range extender test bench platform, the research systematically investigates the performance impacts of different control modes on the range extender's References | Related Articles | Metrics

Design and Research

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Research on Vehicle Horizontal and Longitudinal Cooperative Control for Autonomous Driving Scenarios SUN Qifeng1 , JIANG Qiang2 , SUN Yufei2 , DUAN Min1 , WU Huiyuan1 2025, 50(18): 42-47.  DOI: 10.16638/j.cnki.1671-7988.2025.018.008 Abstract ( )   PDF (1693KB) ( )   To address the trajectory deviation and stability decline of autonomous vehicles in complex scenarios due to the coupling of lateral and longitudinal motions, this paper proposes a laterallongitudinal cooperative control algorithm based on dual proportional-integral-derivative (PID) and model predictive control (MPC). By establishing the kinematic and dynamic models of the vehicle, a hierarchical control strategy is designed with longitudinal speed as the coupling point. Specifically, the longitudinal control uses a position-velocity dual PID to generate acceleration commands, while the lateral control employs MPC to optimize the front wheel angle in real time. A cooperative architecture is constructed to achieve dynamic decoupling. In a joint simulation, experiments on a composite path consisting of an S-shaped curve and a right-angle turn show that under the cooperative control, the peak lateral tracking error is only 0.4 m, the yaw rate fluctuation range is reduced by 30%, the speed tracking accuracy error is less than 5%, and the adjustment amplitude of the front wheel angle is reduced by 30%. The results demonstrate that this algorithm effectively coordinates the conflicts between lateral and longitudinal controls, significantly improving the path tracking accuracy and driving stability, providing theoretical support for the practical application of autonomous driving. References | Related Articles | Metrics

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Strength Analysis and Structural Improvement of Automotive Corkscrew Rollover Platform QIN Zhenyuan1 , LI Jingyu 2 , KUANG Minxing1 , FENG Gangwen2 2025, 50(18): 48-51,77.  DOI: 10.16638/j.cnki.1671-7988.2025.018.009 Abstract ( )   PDF (1186KB) ( )   In response to the potential deformation issues caused by dynamic vehicle impact during the testing process of the designed and developed automotive spiral rollover test bench, this paper employs the LS-DYNA finite element simulation method to construct a finite element model of the corkscrew rollover test bench. Through simulation analysis of the automotive corkscrew rollover scenario under extreme conditions, the structural strength and dynamic response characteristics of the test bench are evaluated, and an improved optimization plan is proposed to address its existing shortcomings. The analysis results indicate that the optimized spiral rollover test bench can effectively meet the strength requirements for automotive spiral rollover tests, significantly enhancing the reliability and stability of the test bench during experiments. References | Related Articles | Metrics

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A Semi-active Suspension Damping Control Method for Impact Excitation YAN Ge 2025, 50(18): 52-59.  DOI: 10.16638/j.cnki.1671-7988.2025.018.010 Abstract ( )   PDF (1270KB) ( )   In order to solve the problem that the semi-active suspension control algorithm of a commercial vehicle deteriorates seriously under the condition of discrete impact pavement, the rapid identification method of impact pavement and the damping control method are studied. By analyzing the vibration acceleration of the vehicle passing through the impact pavement, a mathematical model is established to describe and distinguish different types of impact pavement, and a method for identifying discrete impact pavement according is proposed based on this model. Combining these two methods, the semi-active suspension damping control method based on transmissibility is improved, and the parameters are optimized and verified by experiments. The results show that the proposed method can identify the discrete impact in a short time for the discrete impact condition, with a recognition rate of 91.67%, and an improvement effect of 5.27% on the single-transmissibility strategy. Compared with the passive state, the optimization effect of the fast asphalt road and secondary cement road is 12.5% and 12.82%, which further improves the vibration damping effect of the semi-active suspension damping control method based on transmissibility under various working conditions. References | Related Articles | Metrics

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Research and Optimization on Degassing Performance of Cooling System for Heavy Commercial Vehicle SUN Kai, SU Ningbin, MA Tao, LIU Jingzhong, BAI Ningna 2025, 50(18): 60-63,86.  DOI: 10.16638/j.cnki.1671-7988.2025.018.011 Abstract ( )   PDF (975KB) ( )   In response to the insufficient degassing performance of the cooling system of a certain heavy commercial vehicle during the test, in order to improve the degassing efficiency of the cooling system of the heavy truck, the cooling system of this heavy commercial vehicle is studied. The influence of the layout of the cooling system compensation pipeline on the degassing performance is analyzed, and an optimized layout scheme of the compensation pipeline is proposed. Through experimental analysis and verification, the degassing efficiency of the entire vehicle's cooling system is improved. The research results show that the optimized layout scheme of the compensation pipeline proposed in the article can effectively enhance the circulation capacity of the coolant, reduce the degassing time of the vehicle cooling system by more than 66%, and eliminate the possible backflow phenomenon of the expansion tank. It improves the degassing efficiency and performance of the cooling system, and greatly enhances the reliability and economy of the vehicle power system. References | Related Articles | Metrics

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Research on Optimization of Aerodynamic Performance of Automobile Bottom Leveling Design LIU Gang 2025, 50(18): 64-68.  DOI: 10.16638/j.cnki.1671-7988.2025.018.012 Abstract ( )   PDF (1915KB) ( )   The aerodynamic study of automobile chassis is of practical significance for optimizing the aerodynamic performance of the whole vehicle and improving energy efficiency and range. Flattened chassis is constantly appearing in the design of new car models, and the study adopts computational fluid dynamics method to compare and analyze the aerodynamic performance of the whole car through numerical simulation technology. The results show that the flattened chassis design can reduce the wind resistance coefficient of the whole vehicle by about 3.45%, in which the flattened middle floor area of the whole vehicle changes the surface pressure from positive to negative, which enhances the stability of the whole vehicle in high-speed driving. The pressure in the exhaust pipe area in front of the sub-silencer is reduced by 71.5%, effectively reducing airflow separation. The rear floor flattening design can effectively guide the airflow away from the body, reduce the turbulence effect at the rear of the vehicle, and lower the air resistance. The study verifies the effectiveness of the chassis leveling design in improving the aerodynamic performance of the vehicle and provides data support for the aerodynamic optimization of the whole vehicle. References | Related Articles | Metrics

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Research on the Fine Design of Cup Holder Dimensions for Passenger Vehicle Console CHAI Guotao, YANG Yuan, LING Zihao, ZHENG Haiying, CAO Hongchao 2025, 50(18): 69-77.  DOI: 10.16638/j.cnki.1671-7988.2025.018.013 Abstract ( )   PDF (3375KB) ( )   In recent years, there has been a clear trend of innovation in the field of new energy vehicles, and the optimization of storage space in the console area has become increasingly abundant. Especially in the design of cup holders, the pursuit is a dual improvement of functionality and convenience. Unreasonable cup holder size design can cause items such as coffee and milk tea to be unable to be placed or spilled, thereby affecting driving safety. Therefore, the size design of the auxiliary instrument cup holder becomes crucial, balancing the size and ease of operation of the water cup with other factors that may arise as the structure and function improve. This article defines four core size parameters for cup holders by studying common beverage, milk tea, and coffee cup sizes in the market: cup holder base diameter, cup holder center distance, cup holder depth, and height difference between cup holder and console armrest. By defining these four parameters, a balance between practicality and aesthetic design of cup holders has been achieved, ultimately providing support for the constantly changing innovative design of new energy vehicles and offering users an excellent user experience. References | Related Articles | Metrics

Process·Materials

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Optimization Analysis of Personnel Allocation in Production Mode According to Order GAO Jiayu 2025, 50(18): 78-81.  DOI: 10.16638/j.cnki.1671-7988.2025.018.014 Abstract ( )   PDF (997KB) ( )   Under the background of the times when small batch and more varieties have become the mainstream production mode of heavy truck manufacturing industry, the drawbacks of traditional personnel allocation are prominent. This paper through the optimization research of personnel allocation based on workload analysis, accurately quantifies the workload of each station, and determines the reasonable number of personnel according to the proportion of vehicle types, so as to achieve accurate personnel allocation. At the same time, it is combined with the modularization promotion strategy, from the main line modularization, parts assembly shop modularization to supplier material modularization, pull through the entire supply chain, reduce logistics costs, improve production efficiency. References | Related Articles | Metrics

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Research on the Impact Resistance of Gear Steel for Automobiles TIAN Jing, MOU Hailong, CHENG Yao, ZHANG Chuangju 2025, 50(18): 82-86.  DOI: 10.16638/j.cnki.1671-7988.2025.018.015 Abstract ( )   PDF (3993KB) ( )   To improve the impact resistance of gears and determine the core influencing factors on gear impact performance, basic technical research and verification of small samples are carried out. This paper mainly uses the Charpy pendulum impact test method to verify the carburizing and carbonitriding heat treatment processes for three common gear steel materials: 20CrMnTiH, 22CrMoH, and 18CrNiMo7-6. Through combined verification, impact energy, macroscopic impact fracture surfaces, and microscopic fracture morphologies are compared. It is finally determined that higher contents of Mo and Ni alloy elements are associated with higher impact energy values and denser macroscopic and microscopic morphologies. The verification shows that the difference in impact resistance between carburizing quenching and carbonitriding heat treatment processes is not significant. The verification conclusions provide theoretical support for the selection of automotive gear materials and heat treatment. References | Related Articles | Metrics

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Application of Fixed TorsionTools in Heavy Truck Bolt Assembly Process GAO Peng, SUN Yunsheng 2025, 50(18): 87-90.  DOI: 10.16638/j.cnki.1671-7988.2025.018.016 Abstract ( )   PDF (1822KB) ( )   Due to the increasing proportion of bolted connection in heavy trucks, the tightening torque can not be guaranteed by using pneumatic wrenches in the workshop. It must be tested with a torque wrench before we know whether it is up to the standard or not. If it does not reach the standard, it needs to be repaired and re-tested, which seriously affects the production beat and has a large production noise. It is necessary to select a tool, which can not only ensure the tightening torque of bolts but also meet the requirements of noise reduction. Through the comparison of various types of fastening tools on the market, first of all, the suitable tools are determined and the hoisting mode of tools is designed according to the production site. Then the tightening experiments of various types of bolts are compared, and the bolts that meet the requirements are selected. Finally, it is confirmed that this process mode meets the production needs, when the bolt tightening torque reaches the set value, the equipment will prompt feedback to stop rotation, the bolt tightening torque does not need to be tested, and the production beat can be improved. The sanitary limit of noise level is guaranteed to be less than 85 decibels, which meets the noise requirements of the national production and assembly workshop. References | Related Articles | Metrics

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Control and Improvement of Heat Treatment Deformation for Thin-Walled Gear Rings MOU Hailong, WANG Yan 2025, 50(18): 91-95.  DOI: 10.16638/j.cnki.1671-7988.2025.018.017 Abstract ( )   PDF (1741KB) ( )   To address the issue that the machining precision of finished thin-wall gear rings fails to meet the design requirements, this paper conducts a systematic analysis and research on machining processes such as semi-finished gear hobbing, as well as heat treatment processes including quenching and tempering treatment and nitriding treatment, aiming to improve the precision of finished gear rings. Through investigation, it is found that there is instability in the implementation of the quenching and tempering process. Meanwhile, after sorting out and optimizing links such as temperature control, furnace loading method, and post-furnace cooling in the nitriding treatment, the key risk factors are identified. Improper control of the temperature and concentration of the quenching medium in the quenching and tempering treatment, excessively fast heating rate, excessively high nitriding temperature in the nitriding process, and the adoption of rapid water quenching for cooling after furnace removal. All these factors increase the risk of gear ring deformation. Based on this, the research formulates targeted improvement measures, and ultimately enables the finished product precision to successfully meet the design requirements, providing a referential technical path and practical basis for the systematic solution to the precision problem in thin-wall gear ring nitriding treatment. References | Related Articles | Metrics

Automobile Education

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Exploration and Implementation of a Multidisciplinary Integration Talent Cultivation Models for Vehicle Engineering Major under the New Engineering Context LIU Xiaodong1 , DU Juan1 , BAO Chunjiang1 , ZHAO Ling1 , WU Jian1 , XING Guangpei2 , YAN Zhijun2 2025, 50(18): 96-101,118.  DOI: 10.16638/j.cnki.1671-7988.2025.018.018 Abstract ( )   PDF (1835KB) ( )   To address the innovation needs of talent cultivation models for the vehicle engineering major under the new engineering context, this paper explores practical pathways for multidisciplinary integration. Through methods such as literature analysis, case studies, and practical validation, it analyzes the opportunities and challenges facing the field of vehicle engineering in the new engineering era and expounds on the significant importance of multidisciplinary integration in cultivating vehicle engineering talents. In response to issues in traditional models such as rigid curriculum systems, weak practical components, and homogeneous faculty structures, proposes "four-dimensional integrated" reform measures. These include curriculum system restructuring, practical teaching enhancement, faculty team development, and teaching evaluation optimization. Implementation outcomes are demonstrated through practical cases, providing a reference for cultivating high-quality vehicle engineering professionals who meet the demands of the modern automotive industry. References | Related Articles | Metrics

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Analysis on the Optimization of the Curriculum System for Automotive Manufacturing Technology under the Drive of Intelligent Manufacturing WU Zhiwei, QIN Xiangguo, WANG Yanhui, WU Yuqi 2025, 50(18): 102-107.  DOI: 10.16638/j.cnki.1671-7988.2025.018.019 Abstract ( )   PDF (1537KB) ( )   Under the background of national strategies and industrial upgrading demands, China's engineering education is accelerating the "new engineering" reform. In the context of the rapid development of the new energy vehicle industry and intelligent manufacturing technology, this study focuses on the teaching reform of Automotive Manufacturing Technology, a core course in vehicle engineering programs. This teaching reform adopts the integrated theory-practice teaching method, addressing the current problems such as lagging theoretical system, weak practical links, and insufficient innovation cultivation in the course. Four reform paths are proposed: first, optimize and refine the theoretical knowledge system; second, strengthen practical teaching links and improve teaching models; third, update teaching content and stimulate innovation enthusiasm; fourth, pay attention to industry cutting-edge technologies and carry out course ideological education classes. The reform practice shows that through the introduction of innovative measures such as virtual simulation technology and school-enterprise cooperation projects, students' engineering practical abilities have been significantly improved, and the course satisfaction rate has reached 92%. The proposed "three-dimensional integration" teaching model (theory+virtual+practice) provides a reference teaching paradigm for the cultivation of applied talents under the background of new engineering. The research results show that after the reform, students' proportion of innovative topics related to intelligent manufacturing in course design has increased to 30%. This study has important reference value for promoting engineering education course reform and supporting the development of emerging industries in the national strategy. References | Related Articles | Metrics

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Research on the Teaching Reform Practice of Integrating Intangible Cultural Heritage Elements into Automotive Design LU Tianjia1 , SHAO Wanxing2* 2025, 50(18): 108-112,133.  DOI: 10.16638/j.cnki.1671-7988.2025.018.020 Abstract ( )   PDF (1084KB) ( )   In active response to the national policy call of "integrating intangible cultural heritage into the national education system" and effectively addressing prominent issues in traditional design courses, such as the disconnection between cultural inheritance and industrial needs, and the insufficient integration of intangible cultural heritage techniques with modern engineering technologies, this research takes the core industrial design course Product Design Procedures and Methods as a practical carrier to innovatively construct a teaching reform system for automobile design driven by intangible cultural heritage elements. The research adopts a dual-path implementation strategy of "school-enterprise collaboration+technical inheritance", and jointly carries out the restoration project of intangible cultural heritage ancient vehicle models with industry enterprises, successfully establishing a characteristic resource cluster of "one vehicle, two platforms, three systems and four bases". Relying on the conceive, design, implement, operate (CDIO) engineering education model and deeply integrating the technical iteration experience of two generations of intangible cultural heritage inheritors, it systematically cultivates students' full-process design capabilities from cultural excavation to product realization. Empirical data show that after the implementation of the teaching reform, the achievement rate of students' three-dimensional goals of knowledge, skills and literacy has all reached more than 95%, and the efficiency of digital transformation of intangible cultural heritage techniques has significantly increased by 40%. A total of 12 automobile design works integrating intangible cultural heritage characteristics and modern design concepts have been completed, and 4 types of interdisciplinary teaching resource platforms have been built. The research innovatively proposes a "cultural gene-technical carrier-educational empowerment" ternary integration model, forming a replicable implementation path of "technical digitization–project industrialization–education collaboration". It provides a practical paradigm for the innovation of design courses in vocational colleges and strongly promotes the cultivation of highquality compound technical and skilled talents. References | Related Articles | Metrics

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Research on the Practice Model of Cultivating the Spirit of Scientists Relying on Science Popularization Bases －Taking the Racing Science Popularization Base of North University of China as an Example LI Tao, REN Yan, WEI Qingguo, HAN Shaojian, CHEN Dongdong 2025, 50(18): 113-118.  DOI: 10.16638/j.cnki.1671-7988.2025.018.021 Abstract ( )   PDF (1218KB) ( )   This paper takes the racing science popularization base of North University of China as the research object, aiming to study the practice model of cultivating the spirit of scientists based on this science popularization base. Through case analysis and empirical research, this paper systematically analyzes the establishment of a three-dimensional education system of "theory–practice–innovation" relying on the "123" science popularization and education platform, and forms a closed loop of cultivating the spirit of scientists of "knowledge internalization–scene application–progressive exploration", which effectively cultivates and significantly improves students' spirit of scientists. The research confirms that the racing science popularization base has carrier advantages and demonstration effects in the practice of cultivating the spirit of scientists, providing a replicable solution for the innovation of science and technology talent cultivation models in colleges and universities. References | Related Articles | Metrics

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Analysis of Strategies for Enhancing Employment Capacity of New Energy Vehicle Technology Major in Higher Vocational Colleges XIONG Shiyao, JIN Jianjiao 2025, 50(18): 119-123.  DOI: 10.16638/j.cnki.1671-7988.2025.018.022 Abstract ( )   PDF (1177KB) ( )   To enhance the employability of students majoring in new energy vehicle technology in higher vocational colleges, this article takes Shazhou Professional Institute of Technology as the sample source and conducts a survey through questionnaires and interviews. The survey investigates the current situation of the employability of students majoring in new energy vehicle technology from six dimensions: personal traits, general abilities, professional abilities, career planning abilities, practical application abilities, and social adaptability. The results show that students have deficiencies in professional knowledge and career planning. Therefore, this article proposes strategies from three aspects: students, higher vocational colleges, and social governments. These strategies include increasing professional knowledge reserves, improving core competitiveness, student-centered improvement of employment guidance courses, strengthening government guidance, and highlighting regional employment advantages. The aim is to provide theoretical basis and practical guidance for improving the employability of students majoring in new energy vehicle technology, and to help effectively connect the talent cultivation of higher vocational colleges with the employment market demand. References | Related Articles | Metrics

Standards·Regulations·Management

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Research on the Price Evaluation Method of Pure Electric Used Car Based on the Improved Replacement Cost Method OUYANG Ronghua 2025, 50(18): 124-127,140.  DOI: 10.16638/j.cnki.1671-7988.2025.018.023 Abstract ( )   PDF (1241KB) ( )   In recent years, China's pure electric used car market has shown a rapid growth trend. However, the frequent changes in price policies in the new car market make it difficult to derive an evaluation price recognized by both parties in transactions using conventional current market price method and replacement cost method. To address this issue, this study proposes an improved replacement cost method for price evaluation of pure electric used cars: on the basis of comprehensively applying age-based newness rate and mileage-based newness rate, it re-determines the comprehensive adjustment coefficient by integrating key influencing factors such as vehicle technical condition, usage nature, maintenance status, manufacturing quality, usage conditions, and transaction frequency. Meanwhile, it fully considers the impact of microeconomic environment and macroeconomic policies on the liquidity of vehicles. Verification through calculations with 4 actual transaction cases shows that the relative error between the evaluation price derived by this method and the actual transaction price is controlled within 5%, which can effectively meet the price expectations of both transaction parties and provide strong support for promoting the healthy development of the pure electric used car market. References | Related Articles | Metrics

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Research on Quantitative Model of Driver's Driving Risk in Expressway Tunnels HU Yueqi 2025, 50(18): 128-133.  DOI: 10.16638/j.cnki.1671-7988.2025.018.024 Abstract ( )   PDF (1425KB) ( )   Due to the unique environmental characteristics of expressway tunnels, driving risks in these sections are significantly higher than those in regular road segments, with variations in driving behavior being a key factor contributing to the uneven distribution of risks. To investigate the influence of tunnel environments and driving experience on driving risk, this study focuses on typical expressway tunnels of varying lengths. Real-world vehicle experiments are conducted to collect speed data from different driver groups, including metrics such as average speed, speed deviation from the limit, sectional running speed difference, and acceleration. Factor analysis is employed to construct a quantitative model of driving risk, analyzing the distribution patterns of driving risk across different tunnel segments and variations among driver groups. The results indicate that driving risk exhibits a spatial distribution pattern of "middle segment>exit segment>entrance segment", and tunnel length is positively correlated with risk levels. Experienced drivers demonstrate higher driving risks compared to inexperienced drivers due to overconfidence. By quantifying the distribution patterns of driving risks and behavioral differences among drivers, this study provides a scientific basis for differentiated speed limit design and targeted driver training in expressway tunnels. References | Related Articles | Metrics

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Research on Airbag Abuse Control and National Standard Revision GE Dongdong 2025, 50(18): 134-140.  DOI: 10.16638/j.cnki.1671-7988.2025.018.025 Abstract ( )   PDF (4079KB) ( )   Aiming at the problem of increased risk of airbag abuse under the trend of complex road conditions and vehicle electrification and intelligentisation in China, this paper analyses the shortcomings of the national standard Methods and Requirements of Airbag System Abuse Test for Automobile (GB/T 37474－2019) in the coverage of dynamic scenarios, definition of key parameter thresholds and binding respect, and combines the national autonomous driving standard (NADS) accident data to identify high-frequency risk scenarios such as kerbstone impact, slope braking and so on. Through the practice of enterprise technology optimisation (multi-parameter coordinated calibration reduces the abuse rate from 92% to 15%, and redundant architecture achieves the probability of system failure≤10-9 ) and real-world test validation, puts forward seven recommendations for the revision of the national standard: mandatory inclusion in China's road test standards, refinement of low-speed collision calibration rules, addition of special requirements for electric vehicles (battery scraping test and mass compensation algorithms), and promotion of the standard to be mandatory (GB) et al, to enhance driving safety through the synergistic mechanism of technology and system. References | Related Articles | Metrics