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Vehicle-borne Network Communication System Based on Flexray Bus HUANG Xiaopeng Automobile Applied Technology    2022, 47 (2): 11-15.   DOI: 10.16638/j.cnki.1671-7988.2022.002.003 Abstract （70）      PDF （1251KB）（190）       With the automobile coming into an era of intelligence and electrification, the demand for vehicle-borne network technology is getting higher and higher. As the bus system of a new generation, FlexRay is applied more and more. This paper analyzes the advantages, topological structure and timeliness of Flexray vehicle-borne network system, moreover, it summarizes the specific application of Flexray vehicle-borne network system in vehicles, and explores the development trend of vehicle-borne network technology. Reference | Related Articles | Metrics

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Practice of Blended Learning Mode Based on BOPPPS Model ZHOU Die, DAI Longjiang, YANG Yiqun Automobile Applied Technology    2025, 50 (5): 137-141.   DOI: 10.16638/j.cnki.1671-7988.2025.005.026 Abstract （18）      PDF （1191KB）（136）       This article explores in depth the practical application and effectiveness of the blended learning mode based on the BOPPPS model in the Fundamentals of Automotive Machinery course in vocational schools, analyzes the current problems that exists in the Fundamentals of Automotive Machinery course in vocational schools, studies the BOPPPS model and blended learning mode, and combines the two using the learning platform online teaching platform. A blended learning mode based on the BOPPPS model is designed, and teaching experiments are conducted using task three "automotive valve mechanism" of the Fundamentals of Automotive Machinery course in vocational schools as an example. The results indicate that blended learning based on the BOPPPS model not only enhances students learning interest and classroom participation, but also improves their independent thinking capacity and teamwork abilities, and provides useful references for the teaching reform of related courses. Reference | Related Articles | Metrics

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Research on the Energy Management Strategy of Hybrid Electric Vehicles Based on ECMS-MPC HE Qi Automobile Applied Technology    2022, 47 (20): 19-22.   DOI: 10.16638/j.cnki.1671-7988.2022.020.005 Abstract （71）      PDF （1114KB）（194）       Under the background of energy conservation and emission reduction, energy management and control strategy is the key factor to determine the power, economy and emission of hybrid electric vehicles. In this paper, the mathematical model of the single axle parallel hybrid electric vehicle and its components is established based on MATLAB. On the basis of system modeling, an energy management strategy based on the minimum equivalent fuel consumption prediction model control (ECMS-MPC) is proposed and compared with the energy management and control strategy of dynamic programming (DP). Simulation results show that ECMS-MPC control strategy is close to DP energy management and control strategy in technical results. In terms of computing efficiency, ECMS-MPC control strategy is 6 times higher than DP energy management and control strategy. The superiority of ECMS-MPC control strategy is demonstrated. Reference | Related Articles | Metrics

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Application of VAVE in New Energy Vehicle Industry LIU Wei Automobile Applied Technology    2021, 46 (16): 165-168.   DOI: 10.16638/j.cnki.1671-7988.2021.016.045 Abstract （117）      PDF （1042KB）（297）       In the context that China is the main battlefield of new energy vehicles in the world, combined with the unfavourable factors such as the gradually declining of state subsidies and the continuous downward price pressure from the domestic Tesla Model 3, the design cost of mass-produced vehicles can be continuously optimized by relying on VAVE management tools, the aim of which is to improve the comprehensive quality-price ratio of products, without making compromise to the product quality and customer perception. Practice shows that VAVE is a powerful tool to improve the product competitive of new energy vehicles. Reference | Related Articles | Metrics

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Analysis of UN ECE R155 Certification Scheme for Vehicles QIAO Changxin1 , ZHANG Lingxiao*2 , LIU Jinliang1 Automobile Applied Technology    2024, 49 (15): 148-153.   DOI: 10.16638/j.cnki.1671-7988.2024.015.030 Abstract （25）      PDF （1250KB）（155）       In response to the network security and consumer privacy risks that arise in the development of digitalization, networking, and automation of automotive products, UN/WP.29 has officially issued the UN ECE R155 regulation, which is strict and difficult to apply for certificates. This article analyzes the requirements of R155 regulations and proposes the automotive network security requirements that enterprises need to meet in response to the certification process of R155 regulations, it is of great significance for promoting sufficient network security protection capabilities of enterprise products and meeting the overseas market access needs of enterprises. Reference | Related Articles | Metrics

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Research on Leaching Metal-ions from Spent LiFePO4 Battery Positive Electrode Materials Using Lactic Acid-Based Deep Eutectic Solvents YUAN Zhang1 , JIN Jianjiao*1 , WU Liangqin1 , ZHANG Chenyun3 Automobile Applied Technology    2024, 49 (23): 11-15.   DOI: 10.16638/j.cnki.1671-7988.2024.023.003 Abstract （22）      PDF （743KB）（132）       Deep eutectic solvents, as a new type of green solvent, have shown wide application prospects various fields such as chemistry, biology and material. This study focuses on the positive electrode material of spent lithium-iron phosphate batteries and investigated the leaching effect of metal ions using a deep eutectic solvent prepared with choline chloride (ChCl), lactic acid (LA), and H2O. The leaching effect Li and Fe in the positive electrode was explored by factors such as ChCl/LA molar ratio, solid-liquid ratio, leaching temperature and time. The research results show that under the optimal leaching conditions of ChCl/LA molar ratio of 1:3, solid-liquid ratio of 1:100, leaching temperature of 140 ℃, and leaching time of 8 h, the leaching rates of Li and Fe reached 92.98% and 94.57%, respectively Reference | Related Articles | Metrics

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Design of Teaching Platform of Electric Vehicle Charging System Controlled by CAN Bus YAN Jingming, WANG Ruoxin, WU Jizhang Automobile Applied Technology    2025, 50 (8): 50-57.   DOI: 10.16638/j.cnki.1671-7988.2025.008.010 Abstract （18）      PDF （2752KB）（146）       In order to solve the problem of offline performance testing of the charging system in the teaching of electric vehicle courses, design a controller area network (CAN) bus controlled charging system teaching platform. The article elaborates on the platform design from the composition of the charging system, working principle, platform architecture, hardware selection, software design, and test. Use the USB-CAN interface card to connect the PC as the upper computer to the charging system. Send CAN messages to control the operation of the charging system. Record the output voltage and current values of the 60 s loading test to determine the performance of the charging system. Carry out teaching through the teaching platform, students can master the knowledge and skills of CAN bus control principle of charging system, drive control, and charging machine testing, Provide visual learning scenarios for course instruction, job requirements for the integration of new technologies in electric vehicle repair, enhancing the effectiveness of practical training. Reference | Related Articles | Metrics

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Current Situation and Prospect of Redundancy of Electric Vehicle Line Control System DENG Dejie, CHEN Wenxi, HU Zhuo, ZHANG Guozheng, ZHAO Chenbo Automobile Applied Technology    2025, 50 (4): 9-15.   DOI: 10.16638/j.cnki.1671-7988.2025.004.002 Abstract （55）      PDF （2314KB）（167）       As one of the keys composition to the intelligent chassis control system of electric vehicle, the brake-by-wire system is the basis for realizing the braking control of autonomous vehicle. With the increasing requirements of vehicle intelligence, the requirements of braking system also increase, and the brake-by-wire system with redundant backup function is getting more and more attention. This paper expounds the structure, composition and function of the brake-by-wire system from two aspects of electronic hydraulic brake (EHB) system and electronic mechanical brake (EMB) system, simply introduces the redundancy principle and characteristics of different brake-by-wire system, and puts forward the development prospect of the redundancy of electric vehicle brake-by-wire system. As a result, multi-level redundancy control of the brake-by-wire system will be the direction of future focal point research. Reference | Related Articles | Metrics

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Overview of Lightweight Technology for Commercial Vehicle WANG Xiaolong, FENG Shirong Automobile Applied Technology    2025, 50 (1): 136-141.   DOI: 10.16638/j.cnki.1671-7988.2025.001.028 Abstract （80）      PDF （1474KB）（158）       The lightweight design of commercial vehicles is one of the current research hotspots in the automobile industry. By reducing the weight of vehicles, it can effectively improve fuel economy, reduce carbon emissions, and improve vehicles handling performance and safety. This paper discusses the background and significance of lightweight commercial vehicle in detail, focusing on the application of aluminum alloy, high strength steel and composite materials in body structure, wheels and chassis. At the same time, introduces the application of advanced manufacturing technologies such as 3D printing, laser welding and integrated die casting technology in lightweight design, and the corresponding connection technology, such as riveting, bonding and bolted connection. Typical case studies demonstrate the practical effects of lightweight measures, including improved fuel economy, reduced carbon emissions and improved vehicle performance. Finally, this paper summarizes the positive impact of lightweight design on the overall performance of commercial vehicles, and looks forward to the future development direction. Reference | Related Articles | Metrics

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Optimization of Equivalent Fuel Consumption Minimization Strategy for Plug-in Hybrid Electric Vehicle Using DDPG XU Xiaodong, WEI Wenxiang* , GAN Zidong Automobile Applied Technology    2025, 50 (5): 8-13.   DOI: 10.16638/j.cnki.1671-7988.2025.005.002 Abstract （40）      PDF （1483KB）（113）       To improve the fuel economy of hybrid vehicles, plug-in hybrid electric vehicles are chosen as research subject. The deep deterministic policy gradient (DDPG) algorithm is used to optimize the equivalence factor and battery state of charge (SOC) in equivalent fuel consumption minimization strategy (ECMS). By integrating deep learning's perception abilities with reinforcement learning's decision-making processes, the optimization control of energy management in the hybrid electric vehicle is accomplished. A complete vehicle simulation model is created in MATLAB/ Simulink for experimental purposes. The outcomes demonstrate that, under condition of meeting the vehicle's normal driving power demands, fuel consumption based on DDPG algorithm optimized equivalent fuel consumption minimization algorithm is significantly lower than that of double deep Q network (DDQN) and traditional ECMS, while maintaining battery SOC balance, ensuring multi-objective optimization. Reference | Related Articles | Metrics

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Vehicle LiDAR Key Technology and Its Performance Requirements in Advanced Assisted Driving WANG Xiangyong, WANG Xixi, DAI Lili Automobile Applied Technology    2024, 49 (12): 24-28.   DOI: 10.16638/j.cnki.1671-7988.2024.012.006 Abstract （33）      PDF （1052KB）（125）       With the development of intelligent driving technology, vehicles have put forward high precision requirement for the perception of driving environment, and in the multi-sensor cross-fusion scheme, light detection and ranging (LiDAR) is the key sensor to provide real time, high precision, full scene environment perception for vehicles. To figure out the trends in LiDAR technology, based on the architecture of LiDAR optoelectronic system and the basic principles of electrical detection, this paper expounds the key technologies of forward long range vehicle LiDAR, and systematically introduces the design principles and technical difficulties of LiDAR transceiver control system, scanning and optical system, photoelectric detection and signal processing system and other modules, and meanwhile analyzes the technical route selection of LiDAR. From the perspective of application, the basic performance requirements of vehicle-mounted LiDAR are put forward, and the latest development trend of vehicle-mounted LiDAR is summarized. Reference | Related Articles | Metrics

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Research on the Integrated NVH Simulation of Passenger Car Electric Drive System SHI Tongjie1,2 , NIU Wenbo1,2, LI Bin1,2 , TANG Lechao1,2 , CAI Hui1,2 Automobile Applied Technology    2025, 50 (5): 72-77.   DOI: 10.16638/j.cnki.1671-7988.2025.005.013 Abstract （50）      PDF （1811KB）（123）       The development of electric drive system towards integration leads to the integrated noise, vibration, harshness (NVH) problem. In order to adapt to the trend of integrated development of electric drive, this paper focuses on researching the NVH simulation method of integrated electric drive system, which can realize the integrated modeling of motor and reducer, and consider the vibration and noise simulation calculation of motor excitation and gear meshing excitation together. At the same time, research is carried out to improve the accuracy of the simulation method. Through the measures of flexibility of shafting, adjusting the suspension stiffness and output inertia according to the actual bench installation state, fitting Rayleigh damping curve, etc., the simulation accuracy of the order noise of the electric drive system reaches within ±3 dB(A). This method can help to improve the prediction accuracy of NVH solutions in the early stage of electric drive development and the precise identification of NVH problems in the experimental stage of the later development. Reference | Related Articles | Metrics

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Analysis of THOR 50% Dummy Chest Injury Based on LS-DYNA ZHOU Danfeng Automobile Applied Technology    2023, 48 (15): 121-126.   DOI: 10.16638/j.cnki.1671-7988.2023.015.021 Abstract （33）      PDF （1359KB）（102）       The paper using vehicle-dummy finite element model by LS-DYNA, to study the effects of vehicle restraint system on the chest injury value for THOR 50% dummy in the mobile progressive deformable barrier (MPDB) frontal crashes from 2021 China new vehicle programme. Combined with the optimization of development of restraint system for certain vehicle type under research in the company, in addition to optimizing the seat belt parameters, reducing the area of the overlap area and the thickness of the contact area between the air bag and the dummy's chest after deployment can effectively reduce the compression volume damage of the dummy's chest. The results show that the optimization of driver airbag parameters can effectively reduce the chest compression volume and the effect is significant, provide a new idea for the design of passive safety system of follow-up vehicle. Reference | Related Articles | Metrics

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Analysis on Research Hot Spots of New Energy Vehicle Technology Based on CiteSpace WANG Shuaishuai Automobile Applied Technology    2024, 49 (3): 7-14.   DOI: 10.16638/j.cnki.1671-7988.2024.003.002 Abstract （139）      PDF （9613KB）（129）       A total of 1 799 Chinese and English literatures closely related to the research of new energy vehicle technology are selected through the systematic search of China National Knowledge Network Database and WOS core collection database. CiteSpace 6.2.R2 software is used to map the knowledge network of keywords information, and information mining is carried out from the perspectives of dynamic, multiple and time-sharing, etc. to analyze the theme, evolution path, frontier hot spots and development trend of new energy vehicle technology research. The results show that the current research focuses on lithium-ion battery technology, hydrogen fuel cell technology and regenerative braking technology at home and abroad. Improving battery life and energy saving efficiency is the main trend of future research. In addition, the research of fault diagnosis technology, maintenance technology and infrastructure charging pile is also an important future development direction. Reference | Related Articles | Metrics

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The Common Faults and Diagnostic Methods of Three-electric System YANG Tiancheng Automobile Applied Technology    2024, 49 (15): 166-170.   DOI: 10.16638/j.cnki.1671-7988.2024.015.033 Abstract （66）      PDF （992KB）（126）       With the increase of new energy vehicles and the rise of complaint about the three-electric system, fault diagnosis has ushered in great challenges. In order to better study this issue, it is necessary to conduct a systematic analysis of common faults and diagnostic methods in the electrical systems. The article categorically described the common faults of battery, motor and electrical control system. Then, four types of common diagnostic methods model-driven method, signal-driven method, data-driven, and expert-system method are introduced. Finally, the directions of future research are simply discussed, so as to provide reference for researchers and promote the development of this area. Reference | Related Articles | Metrics

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Design and Modal Analysis of Automobile Instrument Panel Cross Car Beam GAO Weiwei Automobile Applied Technology    2023, 48 (8): 117-120.   DOI: 10.16638/j.cnki.1671-7988.2023.08.020 Abstract （99）      PDF （1516KB）（276）       This paper introduces some important parameters of structural design about cross car beam, such as material selection, beam main and auxiliary pipe beam and other installation support.For the vehicle in road test, considering the mode of the instrument panel beam in the design process, avoid the engine idle condition of the natural frequency and the instrument panel beam mode frequency similar resonance sound, through computer aided engineering (CAE) software analysis of a car instrument panel beam assembly module, and combined with relevant internal standards, the design beam to meet the design requirements, avoid the subsequent beam costs, designed to provide reference for the subsequent similar structure design. Reference | Related Articles | Metrics

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Analysis of the Longitudinal Force Condition of a Certain Type of Leaf Spring WAN Haiqiao Automobile Applied Technology    2024, 49 (18): 102-105.   DOI: 10.16638/j.cnki.1671-7988.2024.018.019 Abstract （25）      PDF （1163KB）（80）       In commercial vehicle suspensions, leaf springs are the most widely used elastic components. In daily design, developers often focus more on the influence of vertical loads on leaf springs, while ignoring the influence of longitudinal impact on leaf springs in extreme working conditions. This article analyzes the longitudinal force of leaf springs when vehicles are subjected to longitudinal acceleration through examples, calculates their strength, and provides design considerations for leaf springs under longitudinal twisting conditions. In daily design, the design stress of the steel plate spring under vertical working conditions is 400～500 MPa, but under longitudinal torsional working conditions, it can be seen from the results that the stress of the front spring reaches 510.2 MPa, which is greater than the stress under vertical working conditions. Therefore, the stress generated by its longitudinal force should not be ignored. Reference | Related Articles | Metrics

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Study on Dual LCL-S Compensation Topology of Electric Vehicle Wireless Charging System LIU Jie, SONG Anran, CHEN Ying Automobile Applied Technology    2024, 49 (24): 11-14.   DOI: 10.16638/j.cnki.1671-7988.2024.024.003 Abstract （64）      PDF （1285KB）（122）       In the research of the radio energy transmission system of electric vehicles, aiming at the problem of the harmonic after the high-frequency inverter, a compensation method is proposed based on LCL-S. This article analyzes the constant-current characteristics of LCL compensation network and a resistive input impedance after compensation. The power factor of the system is improved and transmission characteristic of the system are more stable and efficient. Maxwell, MATLAB and Simplorer are used to carry out joint dynamic simulation and verification of the topology selection of compensation link. The simulation results show that the simulation waveform after LCL-S compensation is more stable. The results show that the transmission characteristics of electric vehicle wireless charging system under LCL-S compensation topology are good. Reference | Related Articles | Metrics

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Research on LQR Control of Air Semi-Active Suspension Optimized by Improved Genetic Algorithm LV Xingchen Automobile Applied Technology    2025, 50 (11): 68-72，88.   DOI: 10.16638/j.cnki.1671-7988.2025.011.013 Abstract （14）      PDF （2965KB）（66）       Aiming at the problem that the selection of weight coefficient parameters in the linear quadratic regulator (LQR) control method of the air semi-active suspension system has limitations and relies to a large extent on manual experience. Taking advantage of the excellent global optimization search ability and parallel ability of the improved genetic algorithm, a strategy for optimizing the control parameters of LQR by the improved genetic algorithm (GA) is proposed. Firstly, establish the mathematical model of the quarter-vehicle semi-active suspension system, and build the simulation model with the LQR controller in the Simulink environment. Then, the simulation experiment of optimizing the LQR controller with the improved genetic algorithm is carried out. The simulation results show that, compared with the passive suspension system, under the random road conditions of Class B and Class C, the LQR controller based on the improved genetic algorithm reduces the peak of vehicle body acceleration by 42.17% and 47.23% respectively, improving the ride comfort of the vehicle. Reference | Related Articles | Metrics

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Multi-scene Trajectory Planning of Intelligent Vehicle Based on Frenet Coordinate System TIAN Mengting Automobile Applied Technology    2022, 47 (16): 10-17.   DOI: 10.16638/j.cnki.1671-7988.2022.016.003 Abstract （85）      PDF （1446KB）（96）       Trajectory planning is an important part of behavior decision-making module in intelligent vehicle, and it is also an important part of cooperative vehicle infrastructure system. Compared with the traditional Cartesian coordinate system, Frenet coordinate system has obvious advantages in vehicle planning algorithm. A multi-scene trajectory planning model for intelligent vehicle based on Frenet coordinate system is proposed. Firstly, based on Frenet coordinate system and vehicle dynamics model, trajectory planning models in horizontal and vertical dimensions are built. Then the trajectory optimization functions in high-speed scene, low-speed scene, car following and other cases are established. Finally, simulation is performed and the results show that the model is reliable and accurate to realize trajectory planning in various scenes effectively. Reference | Related Articles | Metrics