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Optimization Analysis of Suspension Hard Points Based on Abnormal Tire Wear of Electric Vehicles CAI Yun1,2 Automobile Applied Technology    2023, 48 (5): 1-7.   DOI: 10.16638/j.cnki.1671-7988.2023.05.001 Abstract （109）      PDF （1033KB）（491）       The suspension hard point analysis and optimization design were carried out for the abnormal tire wear caused by the increasing body mass of electric vehicles. Adams/Car was used to establish the rigid-flexible coupling virtual prototype model of the double-arm front suspension, and it was verified that the increase of body mass would affect the matching relationship between the external inclination angle and the front bundle angle, and also increase the tire sideslip. In the optimal design is put forward to choose more hard points but only optimize the Z coordinate, quadratic optimization and optimization for the first time the results indicated that scheme is feasible, can sharply reduce the optimization computation and reduce development cycle, at the same time, the optimized electric model of double arm suspension fork wheel camber and toe angle got the matching relation between optimization, tire sideslip quantity greatly reduced, effectively reduce the abnormal tire wear. Reference | Related Articles | Metrics

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Simulation and Analysis of Power Performance of Pure Electric Vehicles Based on MATLAB LI Kai Automobile Applied Technology    2023, 48 (9): 1-5.   DOI: 10.16638/j.cnki.1671-7988.2023.09.001 Abstract （498）      PDF （638KB）（416）       Power performance is the most basic and important performance of pure electric vehicles. Modeling and simulation analysis of the whole vehicle power of pure electric vehicles is of great significance to improve the design level of new energy vehicles. In this paper, the maximum speed, acceleration ability and climbing ability are selected as the power evaluation indicators of pure electric vehicles and the power model of pure electric vehicles is established. Then the model is simulated by MATLAB to obtain the power simulation curve of pure electric vehicles. Finally, the main factors affecting the power of pure electric vehicles are analyzed. The results show that motor peak power and air drag coefficient are the main factors affecting the power performance of pure electric vehicles. Reference | Related Articles | Metrics

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Research Review on Thermal Management of New Energy Vehicles MA Haoran Automobile Applied Technology    2023, 48 (8): 1-9.   DOI: 10.16638/j.cnki.1671-7988.2023.08.001 Abstract （338）      PDF （3142KB）（283）       With the continuous popularity of new energy vehicles, in order to solve the range and thermal safety problems of new energy vehicles in winter and summer, it is necessary to thermal manage new energy vehicles. The contents of new energy vehicle thermal management include winter cockpit heating, summer cabin cooling, battery cooling and heating, motor heat dissipation and power electronic components heat dissipation. The paper expounds the common scheme of new energy vehicle air conditioning and the thermal management scheme of battery and motor, and analyzes the advantages and disadvantages of various schemes. This paper can have certain guiding significance for the research and development of new energy vehicle thermal management technology. 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 Energy Flow Direction of Electric Vehicle and Research on Measures to Reduce Energy Consumption YU Fengzhu Automobile Applied Technology    2023, 48 (3): 20-27.   DOI: 10.16638/j.cnki.1671-7988.2023.03.004 Abstract （178）      PDF （1666KB）（213）       Energy flow analysis is an important analysis method of energy consumption of new energy vehicles. Through energy flow analysis, we can comprehensively understand the distribution of power consumption of vehicle models, quantitatively find the energy consumption difference between sample vehicles and benchmark vehicles, and determine the starting point for the most effective improvement of energy consumption level. In this paper, the energy consumption mechanism of the whole vehicle is analyzed theoretically, and the key control items of energy consumption are mined; automatic control realizes real-time collection and data processing of various energy related physical quantities, and serves as the final acceptance standard of energy consumption reduction measures. Based on the high-precision measured data, the energy flow simulation model of the whole vehicle is established and calibrated. On the one hand, it accurately locates the potential energy conservation direction, and on the other hand, it serves as the theoretical support for the early prediction of the project development, optimizing the powertrain framework, component selection and design parameters, and finding the solution most conducive to energy consumption. Reference | Related Articles | Metrics

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Research on the Deformation of Gradient High Scroll Wrap under Thermosolid Coupling LI Annan Automobile Applied Technology    2024, 49 (6): 163-168.   DOI: 10.16638/j.cnki.1671-7988.2024.006.030 Abstract （31）      PDF （2888KB）（213）       In order to solve a series of problems caused by the deformation of the scroll teeth, a new tooth design scheme－the graduated tooth height scroll tooth is proposed. The tooth head sticking problem is minimized by increasing the tooth height outward annularly, and the effects of gas pressure and temperature fields on the graduated tooth height scroll teeth are simulated by using ABAQUS to establish a finite element model. The results of the study show that the maximum deformation of the center of the scroll tooth is 13 μm under the thermosolid coupling. As the volume of the central compression chamber decreases, the maximum deformation of the scroll teeth increases, which provides a certain theoretical basis for the design of compressor structure and performance optimization. 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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Analysis of Electrical Power Steering PDC Function Principle and Optimization on Pull to Right Issue of Vehicle LIU Xiaoyun Automobile Applied Technology    2023, 48 (23): 36-40.   DOI: 10.16638/j.cnki.1671-7988.2023.023.007 Abstract （428）      PDF （979KB）（185）       Vehicle running off is a common failure mode that affects vehicle performance. According to the vehicle running and deviation characteristics, three stages of pull drift compensation (PDC) function scene identification, compensating torque calculation and PDC compensating torque output are proposed. The test indexes time to drift (TTD) and torque to track (TTT) are included into the performance indexes of PDC function acceptance. The contribution of PDC function to the optimization of deviation problem is expounded and demonstrated, which has certain engineering application value. Reference | Related Articles | Metrics

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Research on Compatibility of Friction Noise of Interior Materials PENG Yun Automobile Applied Technology    2024, 49 (1): 99-105.   DOI: 10.16638/j.cnki.1671-7988.2024.001.019 Abstract （276）      PDF （3417KB）（178）       In order to reduce the risk of friction noise in the forward development process of automotive interior in advance, and reduce the trial and error cycle and cost of physical verification. This article introduces the basic principle of material stick-slip effect and material stick-slip friction test, and analyzes the risk level of friction noise caused by commonly used interior materials under different working conditions. A database has been established for the compatibility of friction noise of commonly used interior materials under normal temperature and humidity conditions, providing guidance for material selection in the early stage of product design. At the same time, the engineering application of the interior material noise compatibility database is introduced, guiding the forward control of interior friction noise. Reference | Related Articles | Metrics

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Three-electric Layout Strategy of Pure Electric Platform XU Han Automobile Applied Technology    2023, 48 (6): 1-4.   DOI: 10.16638/j.cnki.1671-7988.2023.06.001 Abstract （111）      PDF （2737KB）（178）       In order to make the vehicle have better driving range, better planning and layout of the interior space, but also with high safety and high intelligence, pure electric platform came into being. The layout strategy of the core part like motor, battery and motor controller of the pure electric platform has a significant impact on the properties of the platform. Starting from the development of a pure electric platform, this paper studies the influence of different three-electric layout strategies on space, collision safety, vehicle endurance, vehicle model expansion, etc. By choosing different three-electric layout strategies, the original pure electric platform can better fit the platform positioning, with stronger expansion, larger internal space and better performance, and provide detailed reference for the early strategy setting of the pure electric platform. Reference | Related Articles | Metrics

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Performance Simulation Analysis of Pure Electric Vehicle Air Conditioning Control System TANG Jinxiang Automobile Applied Technology    2023, 48 (4): 1-4.   DOI: 10.16638/j.cnki.1671-7988.2023.04.001 Abstract （95）      PDF （534KB）（172）       The air conditioning system of pure electric vehicle is a nonlinear and time-varying system, so it is not easy to get the mathematical model of the system. The conventional proportion integration differentiation (PID) control strategy is not effective, so this paper conducts simulation research on the air conditioning system of pure electric vehicle using fuzzy control strategy. Firstly, the heat load of summer car compartment is calculated, and the mathematical model of the system is established in Simulink under Matlab software. Then the Fuzzy Logic Controller module of the system is designed in Simulink. Finally, variable parameter simulation is carried out on the whole system. By changing the number of passengers in the cabin, the speed of the vehicle, the temperature outside the vehicle and the temperature inside the vehicle, simulation research is carried out. The results show that the temperature inside the air conditioning system of pure electric vehicle with fuzzy control strategy reaches the set temperature in a short time and the fluctuation is not large. In line with the performance requirements of pure electric vehicle air conditioning on response time, overshot, variable load capacity, compared with the traditional PID strategy control effect is better. Reference | Related Articles | Metrics

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Optimization of Process Parameters of Module Laser Welding with DOE Based on Minitab FAN Yuyang Automobile Applied Technology    2023, 48 (20): 145-150.   DOI: 10.16638/j.cnki.1671-7988.2023.020.029 Abstract （557）      PDF （1478KB）（170）       In recent years, with the development of technology, the application of laser welding is gradually popularized, and laser welding is widely used in manufacturing industry, especially automobile manufacturing industry. At present, laser welding is widely used in lithium-ion battery manufacturing, such as module Busbar welding. Laser welding has many advantages, such as high welding speed, small deformation and high precision, it also has higher requirements for tooling and welding parameters. Reflective lens and other components, different equipments have similar welding properties, and welding parameters have mutual influence, which jointly affect the welding quality. In order to obtain better welding quality, in addition to the basic functional performance acceptance of new equipment, the influence between equipment parameters should be further obtained, so it is necessary to verify the parameters of laser welding equipment in an all-round way. It has become an important research aspect for welding process engineers to carry out multi-factor parameter verification tests and study the influence of the interaction between equipment parameters on welding quality. In this paper, the commonly used welding parameters are selected for design of experimen (DOE) verification, and the degree of factor interaction is obtained, and the theoretical optimal solution is calculated and optimized by Minitab tool. Reference | Related Articles | Metrics

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Ultrasonic Measurement Method and Application of Bolt Preload LV Fengyang Automobile Applied Technology    2023, 48 (17): 144-149.   DOI: 10.16638/j.cnki.1671-7988.2023.017.026 Abstract （187）      PDF （1462KB）（165）       Bolt preload is one of the key factors affecting the reliability of bolt connection, and it is of great application value to measure bolt preload directly and accurately. Firstly, based on the principle of acoustoelastic effect, the relationship between ultrasonic propagation speed and axial stress of bolts is studied theoretically, and the calibration relationship between bolt preload and ultrasonic acoustic time difference is established in this paper. Secondly, the influencing factors of ultrasonic measurement of bolt preload are analyzed. Finally, the ultrasonic measurement method and application case of bolt preload are given. The MC900 ultrasonic measuring analyzer is used to monitor the preload attenuation of the dashboard beam and body bolts of a certain vehicle. The test results meet the durability and reliability requirements of the vehicle. The research results show that the ultrasonic preload measurement technology can well monitor the preload changing trend of bolt connection points during the endurance road test of the vehicle, and provide experimental basis for verifying the rationality of bolt tightening torque setting and analyzing the quality problem of torque attenuation. Reference | Related Articles | Metrics

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Performance Research and Experimental Test of Electric Vehicle Power Battery Thermal Management System QIU Jieyu Automobile Applied Technology    2023, 48 (14): 1-6.   DOI: 10.16638/j.cnki.1671-7988.2023.014.001 Abstract （89）      PDF （1334KB）（164）       In view of the problems existing in the thermal management of power batteries, this paper proposed a heat pipe assisted separation battery thermal management system, and built the power battery heat dissipation temperature characteristics of the experimental platform, the power battery thermal management system, analyzed the system to control the temperature and temperature difference of the battery pack. The heat dissipation performance of the power battery thermal management system under the condition of constant discharge of power battery at 1 C, 3 C, 4 C and 5 C, and under different "discharge-charge" cycle conditions were carried out respectively. The results show that compared with other cooling methods, the system has a more suitable operating temperature and can better reduce the temperature imbalance in the battery pack. Even at the extremely high discharge rate of 5 C, the maximum temperature difference can be controlled within 5℃, and the temperature imbalance within a single battery can be greatly improved. Especially in the case of long-term operation, the maximum temperature of each cycle is much lower than that of the traditional phase change material cooling mode, and the reliability and performance of the system are greatly improved. Reference | Related Articles | Metrics

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Analysis of Development Status and Prospect of New Energy Vehicles ZHAI Jiatian Automobile Applied Technology    2023, 48 (20): 193-198.   DOI: 10.16638/j.cnki.1671-7988.2023.020.039 Abstract （341）      PDF （1306KB）（158）       With the progress of social development, China has continuously increased its requirements for vehicular exhaust emission. New energy vehicles, as a new, eco-friendly, and efficient industry, conforms to the concept of green energy and can effectively reduce environmental pollution. In recent years, the technology level of new energy vehicles has continuously improved, and the overall performance of vehicles has greatly increased. At the same time, under the full support of the national government, the new energy vehicle industry has developed rapidly, and the market scale has continued to expand. This article provides a comprehensive analysis of the current development status of China's new energy vehicle industry, summarizes the existing problems, and puts forward targeted and reasonable suggestions, aiming to provide valuable reference for promoting the long-term development of China's new energy vehicle industry. 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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Regenerative Braking Control Strategy for Electric Vehicle XU Haitong Automobile Applied Technology    2023, 48 (1): 5-10.   DOI: 10.16638/j.cnki.1671-7988.2023.001.002 Abstract （94）      PDF （779KB）（150）       Aiming at the energy recovery problem of a front-drive electric vehicle, this paper proposes a braking energy recovery control strategy based on look-up table method. Based on economic commission of europe (ECE) regulations, I curve and front and rear braking force distribution method of f line group with road adhesion coefficient of 0.7, the braking energy recovery control stategy was designed according to five influencing factors including accelerator pedal displacement, brake pedal displacement, vehicle speed, battery state of charge (SOC) and braking strength. AVL Cruise was used to build the vehicle model, and Matlab/Simulink was used to build the braking energy recovery control strategy model. In the new european driving cycle (NEDC) condition, the designed braking energy recovery control strategy was jointly simulated and verified whether it will be correct .The simulation results show that the control strategy designed in this paper meets the requirements of braking stability and safety, and recovers braking energy, and improves battery SOC,Braking energy recovery is up to 18%. Reference | Related Articles | Metrics

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Technology Status and Development Trend of New Energy Vehicle ZENG Jiacheng Automobile Applied Technology    2023, 48 (14): 189-194.   DOI: 10.16638/j.cnki.1671-7988.2023.014.037 Abstract （255）      PDF （1605KB）（140）       According to the three types of new energy vehicles and their key core technologies at home and abroad, this paper summarizes their research status and development trend. In the research of pure electric vehicle and its key technologies, further improve the power density of power battery, the responsiveness of battery management system and the integration of drive motor. In the research of hybrid power system, the research on torque coupling, power coupling and energy synergy management needs to be accelerated. In the research of fuel cell vehicles, the high performance and long life of the stack, the research and development of the key components of the air/hydrogen supply system and the research of the cooling system are the primary tasks of its development. Reference | Related Articles | Metrics

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Analysis of the Layout Architecture of the Electric Drive Assembly in the front Compartment of Battery Electric Vehicle WANG Renkun Automobile Applied Technology    2024, 49 (1): 1-6.   DOI: 10.16638/j.cnki.1671-7988.2024.001.001 Abstract （164）      PDF （1411KB）（138）       Electric drive assembly is the core component of battery electric vehicle, and its location is the key to the front compartment layout of the vehicle, which is related to the vehicle performance, front compartment architecture strategy and platform expansion ability. This paper aims to establish a layout architecture for the front compartment of battery electric vehicle, analyzes the spatial characteristics of the front compartment layout of battery electric vehicle, studies the relationship between the key size factors in the layout of the front compartment electric drive assembly around the position of the key components of the front compartment electric drive assembly, and summarizes the layout method of the front compartment electric drive assembly of battery electric vehicle and the layout principles of the surrounding subsystems. Reference | Related Articles | Metrics

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Study on Thermal Management System for Hybrid Vehicle ZHANG Zhiqiang Automobile Applied Technology    2023, 48 (3): 60-63.   DOI: 10.16638/j.cnki.1671-7988.2023.03.011 Abstract （102）      PDF （1289KB）（133）       A thermal management system for series-parallel hybrid vehicle is designed and studied, which is based on the parameters of hybrid systems. Frist, inlet air volumes for all radiators on different critical conditions are simulated. Then, the simulation results show that the temperatures of high-temperature radiator and oil radiator are 1.5 °C and 3.8 °C higher than the design goals on the worst conditions, which are owed for the poor of inlet air volumes and defect of radiators layout. Finally, the fan and radiators layout are optimized. The inlet air volumes of high-temperature radiator and oil radiator are increased 9.37% and 8.4%. The temperatures of high-temperature radiator and oil radiator are reduced 4 °C and 4.1 °C, which are achieved the design goals. Reference | Related Articles | Metrics