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30 January 2025, Volume 50 Issue 2 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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Road Test Research on Energy Consumption of Range Extended Electric Vehicle in High-Cold Environment HE Junnan1,2 , CUI Xiaochuan1,2 , LIANG Rui3 , ZHANG Guangxiu1 , DONG Xiaofei1,4 2025, 50(2): 1-4,9.  DOI: 10.16638/j.cnki.1671-7988.2025.002.001 Abstract ( )   PDF (621KB) ( )   Relying on the unique technological advantages, the market size of range extended electric vehicle continues to expand, and user attention continues to rise. Meanwhile, the energy consumption performance of range extended electric vehicle in high-cold environment has attracted strong attention. In response to this, based on the Test Methods for Energy Consumption of LightDuty Hybrid Electrie Vehicles (GB/T 19753－2021), this article is combined with the actual road and meteorological conditions in high-cold areas, and preliminarily develops a set of energy consumption road test method for range extended electric vehicle in high-cold environment. A certain range extended electric vehicle is selected for verification testing and result analysis. The experimental results show that this method has good consistency and operability. The all-electric range retention rate of this vehicle is 30.3% and the charge-sustaining cycle energy consumption growth rate is 21.6% in the highcold environment. The work content of this article will provide effective guidance for the research finding of vehicle enterprises and the assessment activities of relevant institutions in the industry. References | Related Articles | Metrics

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Effect of Compression Ratio on the Intake Characteristics of a Hybrid Gasoline Engine MA Baitan1 , CHEN Junxiang1 , MO Zhenglv1 , YAO Kefu1 , PAN Yongliang1 , LIU Tao1 , KANG Zhe*2,3 2025, 50(2): 5-9.  DOI: 10.16638/j.cnki.1671-7988.2025.002.002 Abstract ( )   PDF (754KB) ( )   The effects of different compression ratios on intake, in-cylinder turbulent kinetic energy, roll-off ratio, and in-cylinder flow are investigated for a 1.5 L naturally aspirated hybrid dedicated gasoline engine. A three-dimensional computational fluid dynamics (CFD) simulation software is used to design six different compression ratios (13.1－16.9) to study and analyze with the rest of the parameters unchanged. The following conclusions can be drawn from the data: the in-cylinder air intake decreases with increasing compression ratio, and the degree of change is very small, only within 0.5%, which is negligible. However, an increase in the compression ratio has a significant impact on the turbulent kinetic energy within the cylinder. The maximum reduction in turbulent kinetic energy within the cylinder at the upper stop of compression is nearly 24% compared to the minimum compression ratio. This is unfavorable to the flame propagation within the cylinder. The same result can be obtained through the velocity cloud diagram within the cylinder. Moreover, the variation in the compression ratio also results in a certain degree of fluctuation in the in-cylinder tumbling ratio. References | Related Articles | Metrics

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State of Health Estimation of Lithium Battery Based on Improved Particle Filter WANG Baode, GUO Laigong, LI Xiaolong, HAN Jianqiu 2025, 50(2): 10-14.  DOI: 10.16638/j.cnki.1671-7988.2025.002.003 Abstract ( )   PDF (793KB) ( )   In order to accurately estimate the state of health (SOH) of lithium-ion batteries, this paper proposes an SOH evaluation method based on an improved particle filter algorithm. In order to solve the problem that the particle weight tends to zero in the traditional particle filter algorithm and leads to the loss of particle diversity, the residual resampling algorithm is introduced to replace the traditional resampling method by separating the integer and decimal parts of the particle weight, so as to reduce the particle degradation phenomenon and maintain the diversity of the particle set. At the same time, the unscented Kalman filter (UKF) algorithm is combined to generate Sigma points based on state mean and covariance to capture the uncertainty of the system state more accurately and avoid the truncation error of local linearization approximation. The experimental data published by NASA laboratory are used for verification, and the results show that compared with the traditional particle filter algorithm, the proposed method reduces the average error to less than 2%, and significantly improves the accuracy and robustness of SOH estimation. References | Related Articles | Metrics

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电动汽车；秦 EV；控制策略；故障诊断 WANG Renqun, LI Haixia, LI Qingde 2025, 50(2): 15-21,84.  DOI: 10.16638/j.cnki.1671-7988.2025.002.004 Abstract ( )   PDF (1225KB) ( )   This article summarizes the safety protection and operational safety requirements for new energy electric vehicles based on typical maintenance tasks and the characteristics of maintenance personnel. Taking Qin EV as an example, the control strategy of electric vehicles is studied, and the workflow diagrams of each system are designed. According to the vehicle control strategy and typical phenomena, faults are divided into anti-theft faults, ON power on faults, high-voltage power on faults, vehicle can start but cannot drive normally faults, and other system faults. Detailed fault diagnosis flowcharts are designed for each type of fault. Finally, the system workflow diagram and fault diagnosis flowchart are verified and summarized through fault cases, and the analysis process and measurement methods are provided. The results of this study are logically rigorous, intuitive and easy to understand, which can help maintenance personnel quickly grasp the key points of fault diagnosis and maintenance of new energy electric vehicles, and improve work efficiency and safety. References | Related Articles | Metrics

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Comparative Analysis of Outdoor Heat Exchange Methods for New Energy Vehicle Heat Pump GUO Yucheng, LV Su 2025, 50(2): 22-27.  DOI: 10.16638/j.cnki.1671-7988.2025.002.005 Abstract ( )   PDF (966KB) ( )   Outdoor refrigerant direct heat exchange system and outdoor coolant indirect heat exchange system are two typical new energy vehicle heat pump system architectures, the former has the characteristics of direct and high efficiency, and the latter has low cost and better refrigerant adaptability. For the two different architectures, the performance under typical operating conditions is analyzed by building AMESim simulation models. Get the following conclusions, compared with the coolant indirect heat exchange system and refrigerant direct heat exchange system, the decrease of cooling performance under cooling condition is more obvious than the decrease of heating performance; when temperature is lower, positive temperature coefficient (PTC) thermistor needs to supply heat advance, but the comprehensive coefficient of performance (COP) is still at a comparable level; COP is further reduced due to the influence of electric drive dissipating heat during cooling. The improvement measure is increasing the size of the radiator, or equipping passenger compartment and electric drive with independent radiators. Above analysis process and results provide a reference basis for the selection and design of system solution. References | Related Articles | Metrics

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Research and Application of the Side Pole Crash Safety of a Fuel Cell Vehicle WANG Wuxin, HU Zhaokuo, ZENG Fanbo, WANG Zhenhua, SUN Chaoyu 2025, 50(2): 28-34.  DOI: 10.16638/j.cnki.1671-7988.2025.002.006 Abstract ( )   PDF (2869KB) ( )   Because fuel cell vehicle has the particularity of fuel system, it is different from traditional vehicle and pure electric vehicle, so there are many new problems in the research of crash safety. In this paper, the performance of a fuel cell vehicle under different crash safety standard conditions China insurance automotive safety index (C-IASI), 50 km/h side crash, China-new car assessment program (C-NCAP), 50 km/h side crash and C-NCAP, 32 km/h side pole impact is verified. By comparing the dummy damage value and the maximum deformation of the door, it is confirmed that the fuel cell vehicle will be tested more severely under the condition of side pole impact. Through simulations, the damage degree of different risk points under side pole impact conditions are compared and analyzed to determine the most critical risk position in the aspect of hydrogen leakage safety. The position is the valve of the front hydrogen tank. Based on the risk position, the crash test is carried out, the cause of gas leakage is confirmed, and the corresponding structure optimization is carried out, it provides a certain reference for the research of fuel cell vehicle crash safety. References | Related Articles | Metrics

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Simulation Study on Lean Combustion and Emissions of High Compression Ratio Methanol Engine LI Jiabao, TIAN Yi, YAN Renbin, YANG Hanhui 2025, 50(2): 35-40,51.  DOI: 10.16638/j.cnki.1671-7988.2025.002.007 Abstract ( )   PDF (1302KB) ( )   In order to investigate the performance and emission characteristics of high compression ratio methanol engines under lean combustion conditions, a modified diesel engine is selected as the research object, and the relevant one and three dimensional CONVERGE simulation model is built. The effects of different equivalent ratio, compression ratio and ignition time on combustion efficiency and emission of engine are systematically analyzed by simulating the actual working process of engine. The results show that compared with the standard mixture combustion, the lean combustion mode can use less methanol fuel to meet the performance requirements of the engine, save fuel and reduce CO2 emission. If ignition at the optimal ignition time or increase the compression ratio, it can maintain low CO2 emissions while increasing the cylinder pressure can meet the engine power performance, but it will lead to increased NOX emissions. This study provides a valuable reference for performance optimization and emission control of methanol engines. References | Related Articles | Metrics

Intelligent Connected Vehicle

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Target Selection Algorithm Based on Road Model and Scene Judgment WANG Huanjie, LI Zijian, LI Youhao, YAO Lang, ZHAN Qi 2025, 50(2): 41-46.  DOI: 10.16638/j.cnki.1671-7988.2025.002.008 Abstract ( )   PDF (918KB) ( )   To improve the accuracy of adaptive cruise control (ACC) target selection in scenarios such as turning, lane missing, and ultra wide lanes, a target selection algorithm based on road models and scene judgment is proposed. Establishing optimization problems through the Ceres optimization library, fully considering factors such as self vehicle historical trajectory, target vehicle historical trajectory, self vehicle steering wheel angle, vehicle speed, lane line, road edge, etc., and assigning different weights to generate a self vehicle pre driving reference line that can be used as the basis for ACC target screening. For different scenarios, using the self vehicle pre driving reference line as the benchmark to establish risk zones, judging the relative position relationship between each target location point and the danger zone through geometric relationships, determining it as a following target, entering and exiting the target, responding as soon as possible, and improving driving experience and safety. References | Related Articles | Metrics

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Cruise Object Selection Approach Using Lane Information ZHANG Min, GUO Ziming 2025, 50(2): 47-51.  DOI: 10.16638/j.cnki.1671-7988.2025.002.009 Abstract ( )   PDF (943KB) ( )   The cruise object selection is an important prerequisite for adaptive cruise control to perform vehicle control. This paper proposes a cruise object selection approach using lane information. First, multiple reference trajectories are used to filter the feature points of the ego path, and the ego path is fitted based on the least-squares estimate. Then, the ego lane change status is estimated to determine the object selection area. Last, the cruise object selection is achieved according to the strategies defined. The experimental results show that the approach proposed can select the cruise object accurately, and the object switch is more sensitive while the ego vehicle is changing lanes. References | Related Articles | Metrics

Design and Research

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Analysis and Improvement of Failure Reasons for Commercial Vehicle Thrust Rod Bolts LIU Jianlin1 , XI Zhiguo2 , ZOU Bo2 , ZOU Jicao2 , LUO Chengjun1 2025, 50(2): 52-55.  DOI: 10.16638/j.cnki.1671-7988.2025.002.010 Abstract ( )   PDF (1898KB) ( )   The head position of the vertical pin type V-thrust rod is a typical ball seat-flange connection structure, and the bolt plays an important role in ensuring the stability of the product. In order to solve the problem of bolt failure at the head position of the V-thrust rod used in heavy truck, this paper starts from the initial design of the bolt and the possible causes of bolt loosening, combined with theoretical calculations and computer aided engineering (CAE) analysis of vibration, and determines that the main reasons for the failure are the insufficient initial torque design and the self-loosening behavior under the vibration conditions. Based on this, this paper formulates targeted improvement measures, and selects the optimization scheme through transverse vibration test comparison, which not only solves the practical problems, improves the stability and durability of the product, but also provides guidance for the optimization design of subsequent bolted joints. References | Related Articles | Metrics

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The Application of BP Neural Network in the Optimization of Centrifugal Compressor Impellers DONG Zhiqiang, YU Genliang, DONG Yifei, CHEN Yiheng 2025, 50(2): 56-62.  DOI: 10.16638/j.cnki.1671-7988.2025.002.011 Abstract ( )   PDF (2127KB) ( )   To enhance the design efficiency of centrifugal compressor impellers and reduce computational resource consumption, a method combining improved particle swarm optimization (IPSO) and BP neural networks is proposed. A limited number of computational fluid dynamics (CFD) simulation samples are used to train the BP neural network, creating a mapping between impeller parameters and efficiency. IPSO is applied to optimize the network's parameters, and genetic algorithms (GA) are employ to identify the optimal performance parameters. Results show that the IPSO algorithm improved the network's prediction accuracy and optimization efficiency by enhancing adaptability and global search capability. The optimized impeller achieves a 1.34% increase in isentropic efficiency, a 1.04% increase in polytropic efficiency, and a 10.4% rise in flow References | Related Articles | Metrics

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Vehicle Flashing Design Based on DoIP Protocol GAO Jian, ZHOU Huanyu, WU Mingrui 2025, 50(2): 63-67.  DOI: 10.16638/j.cnki.1671-7988.2025.002.012 Abstract ( )   PDF (1471KB) ( )   How to implement high bandwidth diagnostic communication for vehicles based on Ethernet in vehicle development is undoubtedly a hot topic among engineers. At present, on-board diagnostic technology has become increasingly mature, but there is no standard development system to constrain it. Based on Ethernet and tests diagnostic functions, this paper is achieving a complete closed-loop operation of the diagnostic ecosystem platform. The use of diagnostic communication over Internet protocol (DoIP) has many advantages, such as faster diagnostic response and shorter time for transmitting large amounts of data. The paper will explains the DoIP function from three aspects: UDSonDoIP database development, DoIP diagnostic communication connection, and DoIP flashing examples, combined with practical cases. At the same time, it will provide a comparative analysis between DoIP flashing speed and controller area network (CAN) flashing speed. The results show that diagnostic data transmission based on DoIP not only improves the data transmission speed between diagnostic equipment and electronic control unit (ECU), but also shortens the transmission time, achieving good data transmission performance, and has certain guiding significance for the development of Ethernet diagnostic technology. References | Related Articles | Metrics

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Research on a New External Active Grille Shutter System KE Chaodong, SHU Pingping, E Mingyu 2025, 50(2): 68-71,112.  DOI: 10.16638/j.cnki.1671-7988.2025.002.013 Abstract ( )   PDF (1560KB) ( )   To solve the mileage problem in electric vehicles, the usage of active grille shutter (AGS) are getting even more popular in electric vehicles. This paper is combined a model in a vehicle project to explain the design method for the flexible visible AGS. The content includes attribute target, lay out requirement, structure design and performance requirement. In comparison to traditional AGS system, the flexible visible AGS is more efficient in reducing wind resistance for the vehicle. Meanwhile, the flexible visible AGS can use a creative design to increase the innovative feeling and increase the playability and technic feel for the whole car. It can be a useful reference for new car development. References | Related Articles | Metrics

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Research on Control Strategy of Pinion-Electric Power Steering Based on AMESim ZHANG Junjia1,2 2025, 50(2): 72-76.  DOI: 10.16638/j.cnki.1671-7988.2025.002.014 Abstract ( )   PDF (1562KB) ( )   This article takes the pinion electric power steering (P-EPS) system as the research object. Currently, the modeling and simulation research of electric power steering systems are mostly based on mathematical models. Compared with the actual models, mathematical models often ignore the influence of actual parameters and have large deviations from the actual system. Based on the existing research on the control strategy of the axial electric steering system, a physical model of the P-EPS system is established using AMESim semi-physical simulation software. A control strategy of "three controls and two compensations" suitable for this system is proposed. Combined with the established semi-physical model, simulation research is carried out to verify its correctness and feasibility. The results show that the control performance of the P-EPS system built using AMESim is good and easy to implement, providing a reference for the further development of the control strategy of the P-EPS system. References | Related Articles | Metrics

Testing and Experiment

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Research on Frontal 25% Offset Collision Simulation of a Car Based on LS-DYNA LI Shengyuan, LIU Yufei, LIU Caijuan, HEI Zhonglei 2025, 50(2): 77-84.  DOI: 10.16638/j.cnki.1671-7988.2025.002.015 Abstract ( )   PDF (6023KB) ( )   In order to reduce casualties and property losses caused by vehicle collisions, based on the test procedure of China insurance automotive safety index (C-IASI), this paper establishes a finite element simulation model of frontal 25% offset collision with a certain car as the research object. The safety performance of vehicle in small offset collision is evaluated from the two aspects of vehicle deformation and dummy damage value, and the simulation model is optimized. The optimization results show that the maximum displacement of column A decreases from 159.38 mm to 94.73 mm, which is reduced by 40.73%. The maximum displacement of Shotgun decreases from 60.52 mm before optimization to 50.56 mm, a decrease of 16.44%. The maximum intrusion of the front coiling decreased from 226.78 mm before optimization to 203.29 mm, decreasing by 10.36%. The head injury criterion (HIC) of the dummy is decreased by 39.89%, and the viscous criterion (VC) of the dummy is decreased by 32.48%. This study can provide reference for the subsequent small bias crash test and vehicle structure optimization. References | Related Articles | Metrics

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Research on NOX Emissions from Heavy Duty National VI Diesel Vehicle Aftertreatment Faults WANG Ruxiao, XIA Kun, SHANG Xun 2025, 50(2): 85-89.  DOI: 10.16638/j.cnki.1671-7988.2025.002.016 Abstract ( )   PDF (1297KB) ( )   Based on in vehicle emission testing portable emission measurement system (PEMS), a simulated emission test is conducted on sensors and deteriorated components of a National VI heavyduty diesel vehicle in use. The test results show that the failure of the upstream temperature sensor and selective catalytic reduction (SCR) temperature sensor, as well as the deterioration of exhaust gas re-circulation (EGR) and inter cooler, can significantly worsen the vehicle's nitrogen and oxygen emissions, exceeding the standard emission limit. The failure of the diesel particulate filter (DPF) upstream temperature sensor can cause the nitrogen and oxygen emissions to exceed the limit, but the impact is relatively small. However, the failure of the downstream temperature sensor of nitrogen and oxygen will not cause the vehicle's emissions to exceed the limit. At the same time, the on-board diagnostics (OBD) system can effectively identify vehicle faults and give an alarm. References | Related Articles | Metrics

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Research on Evaluation Criteria of Seat Headrest Shake Based on DOE LI Zhongliang, WANG Huazheng, ZHAO Jinhua, HAN Zifeng, HAN Dongmei 2025, 50(2): 90-94.  DOI: 10.16638/j.cnki.1671-7988.2025.002.017 Abstract ( )   PDF (1598KB) ( )   The seat headrest shakes when driving, which significantly reduces the user experience and affects the user's willingness to buy a car. The current evaluation is difficult to reflect the actual level of seat headrest shake. This paper identifies the influencing factors of subjective evaluation and standardizes them. At the same time, for the shake acceleration test, the test process is standardized from the aspects of sensor selection, pasting, measurement and signal processing; the key factors affecting shake are screened by design of experiment (DOE) method, and the consistency and effectiveness of subjective and objective evaluation are proved based on the correlation analysis of DOE results, and the regression equation of subjective and objective evaluation indicators is established, formulate the acceleration standard value of headrest shake to guide the acceptance evaluation of seat headrest shake. References | Related Articles | Metrics

Process·Materials

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Optimization Design Method for Front Lower Control Arm of Steel Automobile ZHANG Guiyin, LI Ying, JIANG Yu, HU Li, CHEN Zhiyang, CHEN Zhengkang 2025, 50(2): 95-98.  DOI: 10.16638/j.cnki.1671-7988.2025.002.018 Abstract ( )   PDF (1859KB) ( )   A conceptual design to detailed design optimization method is proposed for the front lower control arm of a mass-produced steel vehicle. Elaborate on the design methods of topology optimization key steps such as design domain preprocessing, parameter optimization, and geometric reconstruction, as well as their impact on structural performance; explored the optimization and reconstruction methods of control arm morphology based on stamping technology; elaborated on the identification of sensitive areas in modalities and frequency optimization methods. The redesigned control arm has the characteristics of light weight and excellent performance. The method described in this article provides new ideas for the optimization design of the front and lower control arms of steel vehicles. References | Related Articles | Metrics

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Key Performance of 2 000 MPa Grade Integral Laser Welding Door Ring LI Ning1 , ZHANG jing2 , LI Wenzhong1 , LI Jing1 , LIU Qiannan1 , LI Zhenxing2 2025, 50(2): 99-102.  DOI: 10.16638/j.cnki.1671-7988.2025.002.019 Abstract ( )   PDF (1781KB) ( )   In order to improve the side impact and lightweight effect of the vehicle, the paper briefly describes the key performance technology of integrated laser welding and thermoforming door ring, using three different thickness of 1 000, 1 500, 2 000 MPa strength thermoforming steel plate scheme. From the weld position stretching, Vickers hardness, limit sharp cold bending, low temperature impact, delayed cracking five experiments to verify. The results show that 2 000 MPa integrated thermoforming laser spell welding door ring is the best solution. This study provides experience for the subsequent design and development of integrated door ring. References | Related Articles | Metrics

Automobile Education

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Research on the Teaching Design of New Energy Vehicle Repair Course under the Integration of "Job Positions, Courses, Competitions and Certificates" WANG Kangjun1 , WU Zhuang1 , LIU Dandan2 2025, 50(2): 103-107.  DOI: 10.16638/j.cnki.1671-7988.2025.002.020 Abstract ( )   PDF (1023KB) ( )   The introduction of the comprehensive education model of integrating "job positions, courses, competitions and certificates" has pointed out a new direction for the curriculum reform of the new energy vehicle inspection and maintenance technology major in higher vocational education. In order to effectively enhance the quality of professional talent cultivation, taking the professional core course of Fault Diagnosis of Pure Electric Vehicles as the carrier, this study conducts a survey and analysis to summarize the corresponding relationships among job position requirements, skill competitions, vocational skill certificates, and professional courses. Subsequently, task-driven curriculum design and practical evaluation are implemented. This research explors a teaching design method and path that deepens the integration of "job positions, courses, competitions and certificates". It provides references for the curriculum reform of vocational education, thereby fostering high-quality talents who can meet the demands of the modern new energy vehicle industry. References | Related Articles | Metrics

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Exploration of the Integrated Education Model of "Job Course Competition Certificate Creation" －Taking the Automotive Inspection and Maintenance Technology Major as an Example HUANG Chaoqun 2025, 50(2): 108-112.  DOI: 10.16638/j.cnki.1671-7988.2025.002.021 Abstract ( )   PDF (1237KB) ( )   Developing new productive forces requires high-level technical and skilled talents. Based on the overall development trend of the automotive industry towards electrification, networking, and intelligence, it is necessary to explore new talent cultivation models. This article elaborates on the connotation and implementation principles of the integrated education model of "job course competition certificate creation", and actively explores the implementation of the integrated education model of "job course competition certificate creation", providing reference for improving the quality of talent cultivation. References | Related Articles | Metrics

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Course Ideological and Political Education Exploration and Practice under the Perspective of China's Characteristics Apprenticeship System －Taking the Electric Drive Motor and Control Technology for New Energy Vehicles Course as an Example HUANG Feng, SHEN Xiawei, XU Shuaibing, FAN Tianci, ZHAO Ruoyu 2025, 50(2): 113-117.  DOI: 10.16638/j.cnki.1671-7988.2025.002.022 Abstract ( )   PDF (1084KB) ( )   This paper takes Electric Drive Motor and Control Technology for New Energy Vehicles course as an example to explore the curriculum ideological and political reform under the background of apprenticeship with Chinese characteristics. Guided by the needs of the drive motor industry, we have carefully formed a curriculum team with industry mentors, professional directors, famous teaching teachers and backbone teachers as the core, and developed typical teaching projects that are connected with new industrial technologies, new processes, new materials and new equipment. Curriculum ideological and political education is carried out from the level of curriculum objectives, teaching content and teaching implementation, and ideological and political elements such as national feelings, scientific and technological innovation, craftsman spirit and professional quality are naturally integrated into the teaching process. It has successfully trained a group of applied talents in the new energy vehicle drive motor industry with German skills, contributing educational strength to promote the development of the new energy vehicle industry, and also providing useful reference for the ideological and political reform of other professional courses in the new era. References | Related Articles | Metrics

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Analysis and Countermeasures of the Current Situation of Higher Vocational Education of "Automobile" Related Majors in Henan Province LI Guanfeng1,2 , CAO Yi1 2025, 50(2): 118-122.  DOI: 10.16638/j.cnki.1671-7988.2025.002.023 Abstract ( )   PDF (1064KB) ( )   This paper briefly introduces the setting of "automobile" related majors in the newly revised vocational education catalog in 2021 and the enrollment situation of higher vocational education involving "automobile" related majors in Henan province in 2023. This paper analyzes the problems existing in the rapid development of "automobile" major, such as overheating, uneven basic conditions, unclear characteristics of individual schools, the growth rate of specialty scale exceeding the growth rate of industrial talent demand and the development speed of high-level vocational education. At the same time, the paper puts forward some countermeasures and suggestions to properly control the number of "automobile" specialty, strengthen the construction of basic conditions for opening specialty and steadily develop the higher vocational education of automobile under graduate level. References | Related Articles | Metrics

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Research on Innovation and Practice of CDIO Engineering Education Teaching Model for Integration of Industry and Education －Taking the Course of Materials Mechanics in Vehicle Engineering as an Example SHAO Ruiying1 , WANG Hongjun2 , SONG Juan1 , GE Weiwei1 , ZHOU Xinyuan1 2025, 50(2): 123-126,156.  DOI: 10.16638/j.cnki.1671-7988.2025.002.024 Abstract ( )   PDF (1142KB) ( )   Under the background of the integration of industry and education, this article analyzes the basic situation and teaching problems of the Materials Mechanics course in the vehicle engineering major. Specific measures are proposed from the aspects of changing the educational philosophy of the course, conceptualizing, designing, implementing, and operating the conceive, design, implement, operate (CDIO) engineering education teaching model, and reforming the teaching methods of the course. Finally, practical applications are carried out and certain results are achieved. After the innovation and practice of this teaching mode, students learn basic engineering knowledge in practical projects, enhance their engineering practice ability, solve complex engineering problems, and comprehensive innovation ability, meeting the talent demand of social development. References | Related Articles | Metrics

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Ideological and Political Elements Exploring and Teaching Introduction Design of Automobile Application Engineering Course LIU Haijun 2025, 50(2): 127-131.  DOI: 10.16638/j.cnki.1671-7988.2025.002.025 Abstract ( )   PDF (1059KB) ( )   The article discusses the exploration of ideological and political elements in the Auto motive Application Engineering course and the design of teaching introduction in order to fully realize its ideological and political education function. Firstly, the background of ideological and political education in the course of Automotive Application Engineering is introduced, and then the path and objectives of course construction are pointed out. Taking the chapters of automobile fuel economy and automobile driving safety as examples, this article introduces cases of ideological and political elements in the curriculum. It explains how to introduce ideological and political education in the teaching process from four stages: situational introduction, problem analysis, problem solving, and development comparison. Through the design of teaching methods, it explains how to naturally integrate with knowledge and ability goals. While cultivating students' professional knowledge, we aim to achieve the goal of cultivating moral character and nurturing talents. At the same time, this article also provides reference and guidance for the teaching reform and ideological and political education of the Automotive Application Engineering course in universities. References | Related Articles | Metrics

Standards·Regulations·Management

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Research and Development Project Management Based on Big Data Visualization LIU Hao, PENG Siqi 2025, 50(2): 132-136.  DOI: 10.16638/j.cnki.1671-7988.2025.002.026 Abstract ( )   PDF (1057KB) ( )   With the continuous increase in the complexity and volume of R&D business in the automotive industry, traditional project management platforms are no longer able to meet the needs of enterprise design and development. This study proposes a vehicle development project management solution based on big data visualization to address issues such as low data processing efficiency, information silos, and decision-making lag in vehicle development project management. This solution uses Oracle database for data storage, Python for data preprocessing and analysis, Vue3 and TypeScript for building responsive front-end interfaces, and Echarts for multi-dimensional data visualization. The research results show that this scheme significantly improves data processing efficiency, increases project progress visualization by 85%, shortens decision response time by 60%, and increases cross departmental collaboration efficiency by 40%. At the same time, by establishing key performance indicators such as design cycle achievement rate and prototype first-time pass rate, refined management of the entire project lifecycle has been achieved. This study provides new ideas and methods for project management in the automotive industry and other complex engineering fields, which is of great significance for improving research and development efficiency and product quality. References | Related Articles | Metrics

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Analysis and Recommendations for Product Emission Compliance Management in Enterprises CHEN Hui 2025, 50(2): 137-140.  DOI: 10.16638/j.cnki.1671-7988.2025.002.027 Abstract ( )   PDF (1157KB) ( )   Within the enterprises need to carry out product emission management to ensure product emission compliance. From the perspective of enterprises quality and technology management, based on the management practice of planning, implementation and improvement in the implementation process, the article introduces the control elements of product emissions in the three phases of new product access, production consistency control and in-use vehicles. And the implementation experience of the management links of environmental protection key parts change management, in-use vehicle family division and sample selection principles, and mass production vehicle evaluation test are emphatically introduced. It is expected to provide reference for other enterprises. References | Related Articles | Metrics

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Research on Traffic Safety Evaluation Methods Based on Accident Data MA Long, LIU Junqi 2025, 50(2): 141-146.  DOI: 10.16638/j.cnki.1671-7988.2025.002.028 Abstract ( )   PDF (1761KB) ( )   The risk of traffic accidents is becoming increasingly severe. To assist public security traffic management departments in assessing and managing traffic safety in urban areas, this study constructs an urban area traffic safety risk evaluation model based on "six-in-one" accident data from public security traffic police and data from the Xi'an statistical yearbook. First, relevant traffic safety risk indicators are comprehensively analyzed, and 12 indicators are selected for the model. Then, the weights of these indicators are determined using the fuzzy analytic hierarchy process and entropy weight method. Finally, the model is applied using data from Xi'an from 2021 to 2023, and quantile method is used to grade the traffic safety risks of different areas based on statistical theory. The results show significant differences in model assessments across temporal and spatial scales, aligning well with real-world conditions. This study provides valuable reference for public security traffic management departments in macro-level traffic risk assessment. References | Related Articles | Metrics

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Study on the Development Strategy of State-owned Automobile Testing Organization Based on the PEST Model MENG Deyu, YANG Qian 2025, 50(2): 147-150.  DOI: 10.16638/j.cnki.1671-7988.2025.002.029 Abstract ( )   PDF (1109KB) ( )   Under the background of the "new four modernizations" of automobile industry and the increasingly fierce competition in consumer market, the automobile inspection and testing industry also faces new opportunities and challenges. Based on the complex internal and external environment of the state-owned automobile testing organizations, this paper analyzes the politics, economy, society and technology and other factors by PEST analysis model, the key factors affecting the development of testing organizations are discussed, and the development suggestions and measures are forward to provide reference for the development strategy of testing organizations. References | Related Articles | Metrics

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Evaluation of Intersection Safety Level Based on Traffic Conflict CHEN Limei, YANG Han 2025, 50(2): 151-156.  DOI: 10.16638/j.cnki.1671-7988.2025.002.030 Abstract ( )   PDF (1599KB) ( )   As the key area of traffic flow, the accident rate of the intersection is relatively high, and the probability of conflict and the severity of the accident are different at different intersections, and the overall safety level of the intersection can be analyzed by using traffic conflict technology. In this paper, the video data of six intersections in Xi'an city during the morning rush hour are collected by unmanned aerial vehicle, and the deceleration is used as the evaluation index of traffic conflicts, and the intersection safety level is obtained by using the portfolio empowerment of analytic hierarchy process and entropy weight method, and the whitening weight function is established to divide the safety level of safety level. The results show that the safety level of the intersection of Zhuhong Road and Jinhong Road is the lowest, the intersection of Fengcheng 12th Road and Fengcheng North Road is the second, and the safety level of the other intersections is safe. The comparison of the safety level of each intersection is realized, which provides a reference for the study of the safety level of different intersections. References | Related Articles | Metrics