Automobile Applied Technology

Research on Modeling and Application Characteristics of Portable Photovoltaic Driven Electric Vehicle

ZHOU Rongji1,2 , LI Yong2*

2025, 50(22): 1-4. DOI: 10.16638/j.cnki.1671-7988.2025.022.001

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For urban electric vehicle commuting, a portable foldable photovoltaic charging solution (no vehicle mods) is proposed to use parking-time solar power, reducing grid reliance and emissions. A Simulink model integrating drivetrain, battery, air conditioner, and photovoltaic systems quantifies energy matching for different photovoltaic setups via China light-duty vehicle test cycle (CLTC). Seasonal strategies are developed using data from Shanghai and Urumqi.Simulations show an 1 800 Wp setup fully covers daily commuting energy on 65.51% (Shanghai) and 60.10% (Urumqi) of days. Winter energy use rises by 19.61% (Shanghai) and 42.69% (Urumqi) versus summer due to air conditioner loads. Annual savings exceed 800 kWh, cutting CO2 by hundreds of kilogram to over 1 ton per person. This portable photovoltaic solution significantly extends electric vehicle range, eases grid pressure, boosts renewable integration, and aids low-carbon urban transport.

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Modelling and Simulation of Battery Electric Vehicles Based on Simulink

LI Pengwei1 , LI Haige1 , LIU Xin1 , SHI Yuan1 , CHEN Ziyang2

2025, 50(22): 5-11，23. DOI: 10.16638/j.cnki.1671-7988.2025.022.002

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This study utilizes the Simulink simulation tool to conduct an in-depth investigation into the modeling methods for battery electric vehicles. By designing specific simulation working conditions, the dynamic performance and energy economy of the vehicle are validated, providing an experimental basis for performance optimization. Firstly, taking a specific battery electric passenger car as a prototype, the principles and methods of editing script files and performing modular modeling in Simulink are elaborated. Secondly, the various subsystem modules are organically integrated to construct a complete battery electric vehicle model. Subsequently, parameters related to the vehicle's dynamic performance and energy economy are obtained through simulation runs under the new European driving cycle (NEDC), acceleration, and hill-climbing conditions. Finally, a comparative analysis of the simulation results is conducted, offering theoretical support and data for the design optimization, parameter adjustment, and performance enhancement of battery electric vehicles. The accuracy and effectiveness of the established vehicle model are verified, laying a solid foundation for subsequent research.

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Research on Driving Performance Improvement of a Small Single-Seat Electric Off-Road Vehicle Based on Fuzzy PID Control

XU Siying, XIAO Jiahe, ZHANG Yixuan, HU Zeyu, YANG Haokai, LONG Tengyun, WANG Zheng

2025, 50(22): 12-17. DOI: 10.16638/j.cnki.1671-7988.2025.022.003

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This paper addresses the issues of insufficient motor control precision and unstable driving performance of small single-seat electric off-road vehicles under complex road conditions by proposing a motor control strategy based on fuzzy proportional-integral-derivative (PID) control. By integrating fuzzy logic with traditional PID control and utilizing fuzzy rules to dynamically adjust PID parameters, precise control of motor speed and torque is achieved. Simulation and experimental results demonstrate that this control strategy effectively enhances the dynamic response performance during starting, acceleration, and hill-climbing conditions, while also improving the system's anti-interference capability and stability. Compared to traditional PID control, the proposed fuzzy PID control method shows significant improvements in both driving smoothness and energy efficiency, offering a new solution for motor control in small electric off-road vehicles.

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Automatic Parking without Parking Lines Based on Intelligent Vehicles

SUN Chen, YUAN Min* , DAI Yuze, ZHAO Yihan, QIU Ziyang

2025, 50(22): 18-23. DOI: 10.16638/j.cnki.1671-7988.2025.022.004

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Against the backdrop of the continuous increase in the density of urban motor vehicles and the growing demand for parking in complex environments, in order to solve the problems such as large detection blind areas and delayed dynamic responses caused by the traditional automatic parking system relying on a single sensor, this study aims to design a low-cost automatic parking system based on multi-sensor fusion to achieve precise parking in the environment without parking lines. The system takes STM32F103C8T6 as the core controller, realizes the detection of obstacles around the vehicle body through four TCRT5000 infrared emission sensors, and combines HC-SR04 ultrasonic sensors to accurately obtain the distance information at the rear of the vehicle. The small car can achieve reversing into a parking space or lateral parking without a stop line. It adopts a multi-sensor data fusion algorithm and generates the optimal parking path based on geometric constraints. Experiments show that in the simulated parking space, the success rate of the system reversing into the parking space is 96%, with the entire process taking 5.2 s. The success rate of side parking is 93%, with the entire process taking 6.5 s. This study provides a feasible technical path for automatic parking without parking lines.

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Design and Analysis of Turnout Guidance Mechanism for a Rubber-Tired Track Vehicle

ZHANG Tong1 , TIAN Guoying1,2 , SUN Shulei1,2

2025, 50(22): 24-28,45. DOI: 10.16638/j.cnki.1671-7988.2025.022.005

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In order to find out the guiding process of a new type of rubber-tired track vehicle passing through turnouts, the guiding mechanism of the vehicle is designed and analyzed. Firstly, the geometrical relation between turnout radius and guide rod size is established according to the relative position of the vehicle and guide rail when passing through the turnout in steady state. Secondly, using the structural parameters of a new type of rubber-tired track vehicle, the variation rule of the center of mass position with the guide rod length under the radius of 15～85 m is obtained, and the guide rod length is determined. Finally, by checking the distance between wheel and turnout side wall under different turnout radii, the feasibility of guiding vehicles passing through turnouts is demonstrated. The results show that the trajectory difference between the center of mass and turnouts increases with the increase of guide rod length and decreases with the increase of guide rail radius. Through comprehensive consideration of various factors, the selected guide rod size is 0.8 m. The checking calculation shows that the difference between the inner/outer wheel track and the side wall is more than 7.9 cm, indicating that the vehicle can pass through the turnout within the preset radius smoothly.

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Research on Enhancing VA One Loading Efficiency Using QuickScript

WU Haichuan1,2 , ZHAO Wei1,2 , ZHANG Ao1,2, HE Xiao1,2

2025, 50(22): 29-34. DOI: 10.16638/j.cnki.1671-7988.2025.022.006

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To address the issues of low efficiency, high error proneness and difficult error detection in load application during statistical energy analysis (SEA) modeling, this paper proposes a secondary development scheme for VA One software based on QuickScript language. By designing a three-layer architecture system with seven functional modules, including data reading and writing, load creation, and load information feedback, it realizes the full-process automated handling of acoustic cavity load application. Experimental results show that this secondary development reduces the loading time to approximately 1.2% of the original level for three vehicle types sedans, sports utility vehicle, and multi-purpose vehicle, and the results of automatic loading are completely consistent with those of traditional loading. It provides efficient and reliable technical support for the engineering application of complex SEA models.

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Key Points of Structural Design and Dent Resistance Analysis of Steel Bumper for an Off-Road Vehicle

HOU Jian, HE Xuejin

2025, 50(22): 35-38. DOI: 10.16638/j.cnki.1671-7988.2025.022.007

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Front bumper is an important component of the vehicle structural, integrating safety and decoration. Off-road vehicles have higher requirements for bumpers, and the rationality of their design is of great significance to vehicle research and development. This paper takes the rigid bumper of a body on frame off-road vehicle as an example, explains the materials and structure of steel bumpers, summarizes the structural design of the internal reinforcing bracket and the sealing strip of the steel bumper, aiming to provide a reference for subsequent similar structural designs. At the same time, in view of the situation where customers complained about the dent resistance performance of the bumper in previous models, the dent resistance performance of the front bumper is analyzed using the finite element analysis software HyperMesh. The results show that when the bumper body is subjected to an external force of 100 N, the deformation does not exceed the target value, verifying that the design of this bumper meets the requirements and avoiding subsequent customer complaints due to the local softness of the bumper.

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Research on Innovative Design and Performance Optimization of CDC Dampers

YANG Ling, CHEN Ziyi, JIANG Songfeng, XIE Maosen, XU Zhonghua

2025, 50(22): 39-45. DOI: 10.16638/j.cnki.1671-7988.2025.022.008

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This study focuses on the Buick LaCrosse new energy vehicle, specifically addressing the specialized requirements of suspension systems in electric propulsion applications, with an in-depth investigation into the continuously damping control (CDC) damper within semi-active suspension architectures. Through disassembly and analysis of legacy damper units, the investigation delineates their internal architecture and operational principles. In response to market-identified demands for dynamic performance optimization, comprehensive research encompassing control strategy formulation, system modeling, and simulation verification is conducted. An innovative damping modulation methodology is proposed, featuring structural enhancements to conventional twin-tube damper configurations through an enhanced solenoid valve configuration and the integration of an external damping regulation module. Leveraging advanced simulation tools, multi-body dynamics modeling and co-simulation platforms are employed to generate operational datasets under diversified working conditions. These computational outcomes establish theoretical foundations for the application and refinement of the proposed CDC damper in Buick LaCrosse vehicles, experimentally validating the velocity-dependent characteristics inherent to CDC systems. Beyond providing quantifiable design methodologies for new energy vehicle suspension development, the modular design framework facilitates the adaptation of premium damping technologies to cost-sensitive vehicle segments, demonstrating significant engineering value in advancing the industrialization of active suspension systems.

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Study on Influence of Crash Safety Performance with Remove the Anti-Rotation Hook from the Safety Belt

TU Qichuan, GUAN Yongxue, LI Shifeng, XU Li

2025, 50(22): 46-51. DOI: 10.16638/j.cnki.1671-7988.2025.022.009

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For the design change of a certain light commercial vehicle type that eliminates the limit structure of the seat belt lock hook to improve the comfort of passengers lying flat, evaluate whether it still meets the requirements of ECE R 137 regulations for passenger protection performance in frontal collisions. The article selects three sets of driver's seat samples. Among them, two sets have the lock hook limit and shield structure removed, and are equipped with system components such as instrument panels, airbags, and seat belts. A slide test system is built in accordance with ECE R 137 regulations. A Hybrid III 50th dummy is used, and three repeated collision tests are conducted through high-speed camera and data acquisition equipment. The system analyzes the key injury indicators of the dummy. The results show that after the hook limit is removed, all the injury indicators of the dummies meet the regulatory requirements. The injury value of the head slightly decreases, while the injury values of the neck, chest and thighs remain stable. The test repeatability is good, indicating that the performance of the restraint system is not affected. The removal of the seat belt buckle hook limit structure, while ensuring collision safety, can enhance the comfort of occupants and provide a reliable basis for the design improvement of this model.

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Vehicle Small Overlap Collision Skid Motion Planning and Software Implementation

HE Enze1 , WANG Guojie1 , SHI Aimin1 , XIANYU Yueheng2* , LU Yaohui2

2025, 50(22): 52-57. DOI: 10.16638/j.cnki.1671-7988.2025.022.010

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In automotive collision accidents, frontal small-offset collisions account for a high proportion and result in severe casualties. The core issue lies in the limited contact area between the front crumple zone and the barrier, making it difficult to absorb collision energy and leaving the passenger compartment vulnerable to impact. A skid motion strategy that guides the vehicle to deviate laterally from the barrier can effectively reduce impact loads by minimizing direct contact between the passenger compartment and the barrier. Based on the China-insurance automotive safety index (C-IASI), this paper proposes a skid motion evaluation method centered on kinematic response skid values and vehicle yaw angle as core metrics, providing theoretical support for refining China's automotive safety regulations. Building upon this, a three-degree-of-freedom second-order segmented motion model is constructed, dividing complex collision processes into multiple segments of uniformly accelerated motion. This approach reduces computational complexity while maintaining prediction accuracy. Additionally, interactive planning software developed in MATLAB enables parameter input, real-time computation, and result visualization, providing a powerful tool for automotive safety design.

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Functional Analysis and Optimization of the Power-Supply System for Electrophoresis IGBT Rectifier Power

GAO Hongjie, YUE Lixia, SHANG Huabin, HAN Da, YIN Jinlong, JIANG Qingtao

2025, 50(22): 58-63. DOI: 10.16638/j.cnki.1671-7988.2025.022.011

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This article focuses on the control system of the rectifier power for the electrophoretic in the automotive painting. It deeply analyzes the existing weaknesses of the current domestic systems, such as the control method single for power-supply to the body, the lack of a function for monitoring the thickness of the paint film, and the imperfect grounding protection. In response to these issues, the power-supply control function of the insulated gate bipolar transistor (IGBT) is optimized from the dimensions of the power-supply time node, the power-supply intensity and control type, the power-supply action mode, and the body zonal power-supply. An online monitoring method for the thickness of the paint film based on Ampere-minutes and an improved grounding protection and grounding current monitoring scheme are proposed. Through these improvements, the performance of the rectifier power control system can be significantly enhanced, meeting the requirements of flexible production in automotive electrophoretic coating and ensuring the body process quality.

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Research on the Failure Mechanism and Preventive Measures of Oil Seepage Problem at the Drain Plug Sealing Surface of a Certain Type of Transmission

QIU Xin

2025, 50(22): 64-68,98. DOI: 10.16638/j.cnki.1671-7988.2025.022.012

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Oil seepage is a prevalent quality issue in the field of mechanical manufacturing. Interface oil seepage in transmissions is a particularly common and challenging problem in vehicle maintenance, leading not only to resource waste and environmental pollution, but also potentially causing equipment failures and safety hazards. In response to the frequent occurrence of interface oil seepage in a certain type of transmission during its early usage stage, this paper conducts a systematic fault analysis, delves into the core mechanism of the seepage, and proposes targeted corrective measures. Innovatively, a tripartite solution is introduced, comprising error-proofing tooling design, a dual-level inspection protocol, and optimized assembly processes. After implementation, the failure rate significantly decreased. The solution features minimal structural modifications, low cost, and ease of promotion, providing theoretical support for the reliability design of transmission sealing.It can be widely applied to resolve similar oil seepage issues.

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Research on Effective Paths for Building Intelligent and Connected Vehicle Technology Courses Based on the OBE Concept

WANG Yunlong

2025, 50(22): 69-73. DOI: 10.16638/j.cnki.1671-7988.2025.022.013

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This study constructs a curriculum system for intelligent and connected vehicle technology based on the outcome-based education (OBE) concept, aiming to enhance the effectiveness of talent cultivation in the intelligent and connected vehicle specialty. The existing intelligent and connected vehicle curriculum system and market demands are analyzed to deconstruct the composition of the intelligent and connected vehicle course modules. Guided by the OBE concept, the learning outcomes, teaching content, teaching methods, and teaching practices for each module are designed, thereby establishing a more effective intelligent and connected vehicle curriculum system. Through in-depth analysis, the intelligent and connected vehicle curriculum system is ultimately divided into five modules: vehicle engineering fundamentals, intelligent technologies,network communication technologies, driver assistance systems, and software development and testing. The learning outcomes, teaching content, teaching methods, and teaching practices for each module are designed and elaborated. Under the new curriculum system, both students and teachers have shown significant growth, and teaching effectiveness has markedly improved.

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Exploration under the Collaborative Concept of the Construction of Ideological and Political Teaching Team for Vehicle Engineering Major Curriculum －Take the Northeastern University at Qinhuangdao as an Example

MA Lianjie

2025, 50(22): 74-80. DOI: 10.16638/j.cnki.1671-7988.2025.022.014

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In response to issues such as insufficient ideological and political competence among teachers, the "two-skins" and "forced integration" in the curriculum ideology and politics within the Vehicle Engineering major, Northeastern University at Qinhuangdao adopts "collaboration" as the core concept and a "vehicle engineering+ideology and politics" model. It transformes a singlecurriculum team into a "bidirectional integrated team", which is subsequently upgrades into an "educational community". Through this two-phase team "evolution", an efficient interdisciplinary teaching team construction model for curriculum ideology and politics is developed. Practice has demonstrated that this model, through systematic collective lesson planning, collaborative teaching design, and team teaching and so on methods, effectively explores ideological and political elements within the major curriculum and integrates them organically into classroom instruction. The study successfully addresses the "two-skins" difficult problem between ideological and political education and major teaching, achieving alignment and synchronization between major curriculums and ideology and politics curriculums. It significantly enhances the comprehensive competence of major teachers in integrating ideology and politics into the curriculum, providing a valuable reference for the construction of teaching teams in engineering majors curriculum ideology and politics.

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Construction and Intelligent Evaluation of a Virtual Training System for Mold-Related Majors from the Perspective of Industry-Education Integration

ZHANG Na

2025, 50(22): 81-86,122. DOI: 10.16638/j.cnki.1671-7988.2025.022.015

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In response to China's "Smart Transformation and Digital Transition" strategy, this study addresses critical challenges in mold-related majors training, such as high equipment costs, limited teaching resources, and the misalignment between education and industry needs. A virtual training system integrating job roles, courses, competitions, and certifications has been proposed to improve the quality and efficiency of practical teaching. Based on the concept of industry-education integration, the system incorporates virtual reality (VR) and digital twin (DT) technologies to develop a virtual training platform that covers the entire process of mold design, numerical control machining machining, assembly, and inspection. The platform is built using the Unity 3D engine to create high-fidelity simulation environments and employs object linking and embedding for process control unified architecture (OPC UA) and message queuing telemetry transport (MQTT) protocols to synchronize data between virtual and real devices, forming a bidirectional digital twin system. Artificial intelligence (AI) algorithms are used to analyze student operational behavior in real time, generate personalized skill evaluation reports, and support a real-case library developed through school-enterprise collaboration.Comparative experiments indicate that students who participated in virtual training performed better in hands-on skills and job adaptability than those in traditional training groups. Moreover, 85% of students recognizes the training's effectiveness, and enterprises report reductions in training costs and onboarding time. Through immersive interaction and intelligent feedback mechanisms, this system helps align teaching content with industry demands, enhances the effectiveness of school-enterprise cooperative education, and provides a potentially replicable technical approach and educational model.

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Research and Exploration on Industry-University-Integration-Innovative Collaborative Training Mode of Intelligent Science and Technology Major

DENG Zhaowen1 , GAO Wei2* , CHEN Yufeng1

2025, 50(22): 87-91,103. DOI: 10.16638/j.cnki.1671-7988.2025.022.016

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Facing the rapid development of the industry and the problem of the shortage of vehicle intelligent talents, how to break through the industry-university-integration-innovative of the face of the "integration but not integration, integration but not deep" dilemma, to achieve the organic integration of the education chain, the talent chain, the industrial chain and the innovation chain, the targets such as connotation, sustainable development of the modern industrial college, is the key problem of the university urgently need to crack. The paper is guided by the concept of industryuniversity-integration-innovative, and carried out professional construction in combination with the requirements for the construction of new engineering disciplines. Firstly, based on the concept of industry-university-integration-innovative, the talent cultivation target of the Intelligent Science and Technology major are optimized. Secondly, the "4+2+2" talent cultivation mode of industry-universityresearch collaborative is constructed combined with the actual job needs of enterprises. Then, the characteristic discipline group that meets the demand of transformation and upgrading of the automobile industry is constructed to achieve the optimization of the curriculum system and the teaching content. Finally, through the innovative carrier of intelligent automobile industry college, the two-way flow of talents between schools and enterprises is realized, and a "dual-teacher, threecapability type" teacher team is created, and the talent cultivation is highly effective.

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Research on Teaching Method of Intelligent Electric Drive Specialty Based on Semi-Physical Intelligent Electric Drive Platform

LI Zexing1 , ZHANG Zixuan2 , YANG Lou2 , ZHAO Yuhe1 , WAN Haolong1

2025, 50(22): 92-98. DOI: 10.16638/j.cnki.1671-7988.2025.022.017

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Aiming at the problems of loose curriculum system, disconnection between training equipment and industry, and single teaching scene in the teaching of intelligent electric drive specialty in higher vocational colleges, this study constructs a teaching reform scheme based on semi-physical intelligent electric drive platform with the development of professional ability as the guidance. By constructing the evaluation system of intelligent electric drive course, building a professional semi-physical platform, and developing diversified training scenarios, a "project-led, task-driven" teaching mode is formed, and a student-centered teaching mode is explored. Practice shows that this method can effectively improve students' technology migration ability and innovation ability. It not only promotes the digital curriculum reform of vocational education, but also provides talent support for the intelligent transformation of manufacturing industry. It forms a typical paradigm of two-way empowerment of education chain and industrial chain, and provides a reference implementation path for the teaching reform of new engineering majors in higher vocational colleges.

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Exploration and Practice of the Path for School-Enterprise Collaboration in Serving "Vocational Education Goes Global" －A Case Study of the Automobile Major in Fujian Chuanzheng Communications College

ZHU Jianbao

2025, 50(22): 99-103. DOI: 10.16638/j.cnki.1671-7988.2025.022.018

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The internationalization of vocational education is a key approach to enhancing the level of vocational education and strengthening its international influence. This article elaborates on the basic situation and educational models of Chinese "Vocational Education Goes Global". Taking the automobile major of Fujian Chuanzheng Communications College as an example, it explores and practices the path of internationalizing vocational education. The college has innovated its working mechanisms, collaborated with enterprises "going global" to build an international school-enterprise cooperation education platform, developed an internationally minded "dual-qualified" teaching faculty, and constructed a system for cultivating international technical and skilled talents, build international vocational education standards for automotive maintenance majors. It tailors distinctive international vocational education programs to local conditions in different countries, carry out professional construction guidance and auxiliary operation, jointly nurturing international automotive craftsmanship talents and exporting the "Chuanzheng Model" of vocational education. The aim is to provide a reference for the internationalization of domestic vocational colleges.

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Exploration and Practice of the Application-Oriented Graduate Cultivation Model for Intelligent Connected Vehicle under the Background of "Four-Chain Integration"

LIU Xiaofeng1,2 , SONG Wanze1,3 , CHENG Ying1,2 , CHEN Qiang1,2

2025, 50(22): 104-109. DOI: 10.16638/j.cnki.1671-7988.2025.022.019

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In response to the talent demand for the development of the intelligent connected vehicle industry, this paper analyzes the problems faced by the cultivation of application-oriented graduate under the background of "four-chain integration", such as inadequate understanding, insufficient curriculum system reconstruction, and insufficient cultivation of practical and innovative abilities. Then, this study explores a new model of "four-stage" collaborative practice education and cultivation, which has achieved good results and provided useful reference for deepening the reform of the application-oriented graduate cultivation for intelligent connected vehicle.

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Research on the Competency Requirements for Automotive Vocational Students in the Autonomous Driving Industry

XIE Da

2025, 50(22): 110-115,140. DOI: 10.16638/j.cnki.1671-7988.2025.022.020

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To meet the demand for high-quality technical and skilled talent in the high-quality development of the autonomous vehicle industry and to promote the upgrading and transformation of automotive specialties in vocational education, it is necessary to analyze the needs of the autonomous driving industry and conduct an in-depth study on the cultivation of automotive professionals in higher vocational colleges. Based on the job clusters within autonomous driving enterprises, this paper is analyzing the competency requirements for automotive vocational students driven by the development of the autonomous vehicle industry. It is investigating the skill sets demanded by these job clusters for autonomous driving talent. Furthermore, it is examining the gap between the current state of intelligent and connected vehicles education in higher vocational institutions and industry needs. The study is providing recommendations for cultivating talent in the intelligent and connected vehicles technology specialty, offering reference and insights for higher vocational colleges in developing intelligent and connected vehicles talent within their automotive programs.

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Research on Optimization of the Parts Warehouse Layout at the BMW Dealership in Zhengzhou

REN Linjie, WANG Xinhui

2025, 50(22): 116-122. DOI: 10.16638/j.cnki.1671-7988.2025.022.021

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Optimizing the layout of the parts warehouse is a crucial aspect of enterprise warehouse management. It increases storage density, reduces operating costs, and improves efficiency, as a result, customer satisfaction is significantly enhanced. The Zhengzhou Yidebao BMW dealership is selected as the research subject. An analysis of the parts warehouse revealed unreasonable functional-zone sizing, an irrational overall layout, and non-standard operating procedures, leading to low efficiency and safety risks. The areas of all functional zones are rescaled and redesigned, and the warehouse layout is optimized using the systematic layout planning (SLP) method, resulting in a new layout scheme. Quantitative comparison and expert evaluation have both shown that the new solution can significantly improve warehouse capacity utilization rate, effectively shorten stocking time, and improve operational safety, verifying its application value.

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Research on the Mechanism of the Influence of Linear Parameters on Accident Amount of Highway in Mountainous Areas －Taking a Highway in Yunnan as an Example

LI Taifeng1 , XIONG Chang'an2*

2025, 50(22): 123-127. DOI: 10.16638/j.cnki.1671-7988.2025.022.022

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To quantitatively analyze the influence of road alignment on the traffic accident rate of mountainous highways, this study collects road alignment data, traffic volume data, and traffic accident data from 2018 to 2021 on a typical mountainous highway in Yunnan Province, and analyzes the correlation relationship between road alignment and accident amount from four perspectives: longitudinal slope, vertical curve slope difference, level curve deflection angle, and level curve radius. The accident amount is summed over 100 million vehicle-kilometers, and the correlation between road alignment and accident amount is analyzed from four perspectives: longitudinal slope gradient, vertical curve gradient difference, level curve deflection angle and level curve radius. The results show that: 1) the longitudinal slope has a quadratic relationship with the accident amount of 100 million vehicle-kilometers, and the accident amount of 100 million vehicle-kilometers increases when the slope increases; 2) the difference in the slope of vertical curves has a quadratic relationship with the accident amount of 100 million vehicle-kilometers, and the accident amount of 100 million vehicle-kilometers decreases and then rises when the difference in the slope increases; 3) the accident amount of 100 million vehicle-kilometers increases when the angle of deviation of flat curves increases and the speed of the increase becomes slower gradually; 4) left-turn, right-turn radius of the level curve and the accident amount of hundreds of millions of vehicle-kilometers have a logarithmic function relationship, and the accident amount of hundreds of millions of vehicle-kilometers decreases when the radius of the level curve increases.

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Research on Automotive Perceptual Quality Evaluation System

WU Li, TANG Shanhong, ZHANG Mingyue

2025, 50(22): 128-132. DOI: 10.16638/j.cnki.1671-7988.2025.022.023

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With the increasing demand for automobile quality among consumers, the application of automotive perceived quality evaluation in the whole vehicle development process has become more widespread. However, independent brands currently lack systematic research on the perceived quality evaluation system. This article summarizes the research status of various automobile manufacturers, provides a detailed introduction to the definition, classification and research content of automotive perceived quality, conducts in-depth discussion and research on the implementation of perceived quality work and the evaluation system by combining the practical experience of a joint-venture automobile enterprise, focuses on detailing perceived quality evaluation methods as well as the evaluation timing, content and mode of perceived quality in each stage of new vehicle development, including virtual evaluation, model evaluation and physical vehicle evaluation, and proposes a progressive evaluation system based on perceived quality evaluation of mass-produced vehicles，perceived quality evaluation of new models and perceived quality evaluation of specific issues, thereby providing theoretical guidance and practical reference for automobile enterprises to carry out perceived quality work.

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Research on Traffic Risk Prediction Method for Highway Work Zones with Large Traffic Volume and High Truck Ratio

WANG Zhexuan

2025, 50(22): 133-140. DOI: 10.16638/j.cnki.1671-7988.2025.022.024

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The superimposition of fixed and mobile bottlenecks in highway work zones triggers the "water hammer effect" in traffic flow. This effect is a key factor inducing traffic accidents, especially on road sections with high traffic volume and a high proportion of trucks. To reduce such accidents at the source, this paper proposes a traffic conflict prediction model that accounts for the "water hammer effect", which can provide real-time early warnings to managers when traffic risks in work zones increase. Through simulation experiments and random forest modeling analysis, a comparison of the prcediction accuracy between the macroscopic model (MAM) and the microscopic model (MIM) shows that the MIM model has significantly higher prediction accuracy (R 2 =93.49%) than the MAM model. Further analysis combining macro and micro traffic flow characteristics with the feature importance of the MIM model clarifies the close correlation between traffic conflicts and individual vehicle movement states, vehicle-to-vehicle interactions, and traffic bottlenecks, and confirms that the "water hammer effect" exerts a significant negative impact on traffic safety in work zones.

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Analysis and Outlook of Standards Related to Vehicle Electronic Data Recording

WANG Ziyue, SUN Jiawei, MA Qiang

2025, 50(22): 141-144. DOI: 10.16638/j.cnki.1671-7988.2025.022.025

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With the continuous development of automotive intelligence and connectivity technologies, the volume of automotive electronic data is growing explosively. To standardize electronic data recording practices, the state has issued relevant standards covering automotive event data recording systems, autonomous driving data recording systems, in-vehicle video driving recording systems, and tachographs. To help enterprises clarify the standard requirements for different data recording systems, this article conducts in-depth analysis and horizontal comparison of the aforementioned standards. It also elaborates on the practical challenges faced by automotive electronic data recording and the future development prospects of the standards, providing support for improving the regulatory compliance and market access efficiency of manufacturing enterprises.

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