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EVT Logistics Vehicle Cost Recovery Cycle and Economic Analysis

IFAC-PapersOnLine 2018年第31期51卷 415-422页

作者： Zeng, Xiaohua Li, Hongcheng Song, Dafeng Yang, Nannan Wang, Zhenwei State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China

Hybrid vehicles are favored by the market because of their good economic. Therefore, the cycle of cost recovery and its economy have become one of the most concerned issues in the development process. This paper analyzes the economic impact factors of logistics vehicles using electronic continuously variable transmission (EVT) hybrid power system. At the same time, the cost and the cost recovery cycle under different conditions were estimated and analyzed. Finally, the fuel economy of traditional vehicles, EVT logistics vehicle with electrified engine accessories and without electrified engine accessories was compared and analyzed. This paper provides a method for calculating the cost recovery cycle of hybrid vehicles. At the same time, it provides a reference for the development and design of the system from the perspective of obtaining better economical efficiency. © 2018

关键词： Costs Cost benefit analysis Depreciation Economic analysis Economic and social effects Electric power transmission Engines Fuel economy Hybrid vehicles Recovery Vehicle transmissions Continuously variable transmission Cost recovery Development process Economic impacts Economical efficiency Hybrid power systems Logistics vehicles

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An analysis of regenerative braking and energy saving for electric vehicle with in-wheel motors

International Journal of Control and Automation

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International Journal of control and Automation 2014年第12期7卷 219-230页

作者： Jin, Li-Qiang Chen, Peng-Fei Liu, Yue State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China

Based on the structural features of electric vehicle (EV) driven by in-wheel motors and the characteristics of low speed as well as high torque for in-wheel motors, regenerative braking method for in-wheel motors has been presented. All braking torque for vehicle deceleration is output by in-wheel motors under Medium-intensity braking condition for the sake of recovering the maximum braking energy. The vehicle dynamics model that includes the hydraulic braking system and in-wheel motors driving system has been built by AMESim software. simulation has been carried out for vehicle driving conditions by NEDC cycle and FTP75 cycle. The result shows that the recovery rate of braking energy is increased dramatically by in-wheel motor braking method. The energy efficiency of electric vehicle has been improved more than 30%. It is significant for electric vehicles to increase driving range and reduce costs. © 2014 SERSC.

关键词： Regenerative braking

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Research on Parameters Matching Design Method for Planetary Hybrid Logistics Vehicle

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IFAC-PapersOnLine 2018年第31期51卷 21-28页

作者： Song, Dafeng Yu, Fukang Zeng, Xiaohua Yang, Nannan Wang, Zhenwei State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China

This article applies planetary hybrid system to logistics vehicles, and parameter matching of key components for vehicle power source. In the matching of planetary rows, a method based on the optimal solution of the eigenvalues of the transmission system efficiency is used to optimize the selection of eigenvalues. Considering the full use of engine dynamics, the two motors are matched in the case of using the engine's external characteristic strategy, and they are solved under the limit conditions and C-WTVC operating conditions respectively. When energy matching is performed on the super capacitor, the kinematics segmentation is performed on the operating conditions to analyze the energy variation in each segment. Finally, a logistics vehicle model is established in Cruise to simulate the dynamics and economy to prove the reasonable matching method. © 2018

关键词： Hybrid vehicles Eigenvalues and eigenfunctions Electric power transmission Engines Hybrid systems Feature parameters Logistics vehicles Parameters matching Planetary hybird system power system

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An enhanced eco-driving strategy based on reinforcement learning for connected electric vehicles:cooperative velocity and lane-changing control

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Journal of Intelligent and Connected Vehicles 2022年第3期5卷 316-332页

作者： Haitao Ding Wei Li Nan Xu Jianwei Zhang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchunChina

Purpose–This study aims to propose an enhanced eco-driving strategy based on reinforcement learning(RL)to alleviate the mileage anxiety of electric vehicles(EVs)in the connected ***/methodology/approach–In this paper,an enhanced eco-driving control strategy based on an advanced RL algorithm in hybrid action space(EEDC-HRL)is proposed for connected *** EEDC-HRL simultaneously controls longitudinal velocity and lateral lane-changing maneuvers to achieve more potential ***,this study redesigns an all-purpose and efficient-training reward function with the aim to achieve energy-saving on the premise of ensuring other driving ***–To illustrate the performance for the EEDC-HRL,the controlled EV was trained and tested in various traffic flow *** experimental results demonstrate that the proposed technique can effectively improve energy efficiency,without sacrificing travel efficiency,comfort,safety and lane-changing performance in different traffic flow ***/value–In light of the aforementioned discussion,the contributions of this paper are *** enhanced eco-driving strategy based an advanced RL algorithm in hybrid action space(EEDC-HRL)is proposed to jointly optimize longitudinal velocity and lateral lane-changing for connected EVs.A full-scale reward function consisting of multiple sub-rewards with a safety control constraint is redesigned to achieve eco-driving while ensuring other driving performance.

关键词： Ecological driving Electric vehicles Reinforcement learning in hybrid action space Velocity and lane-changing control Reward function

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Fuel Injection Quantity Fluctuation Analysis and Compensation control for Multiple Injections of Common Rail System 36

Fuel Injection Quantity Fluctuation Analysis and Compensatio...

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第36届中国控制会议

作者： Liang Zhang Qifang Liu Hong Chen Xiaohui Lu State Key Laboratory of Automotive Simulation and Control

ISBN: (纸本)9781538629185

To solve the inaccurate injection quantity problem in multiple injections of high pressure common rail injection system,in this paper,a simulation model of the system is developed in AMESim environment,and the injection quantity fluctuation characteristics with respect to the dwell time between consecutive injections and pilot injection quantity are *** results show that injection quantity fluctuates periodically and the fluctuation range attenuates gradually with increasing dwell *** addition,under the same main injection,the fluctuation amplitude of the fuel injection quantity increases with the increase of pilot injection ***,the influence of rail pressure on fuel injection quantity fluctuation is also ***,a fuel compensation control strategy based on map for multiple injections is designed which can improve the injection control effectively.

关键词： High pressure common rail Multiple injections Injection quantity fluctuation characteristic Injection control strategy Injection quantity compensation

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Robust control for active suspension system under steering condition

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Science China(Technological Sciences) 2017年第2期60卷 199-208页

作者： WANG ChunYan DENG Ke ZHAO WanZhong ZHOU Guan LI XueSong Department of Automotive Engineering Nanjing University of Aeronautics and Astronautics State Key Laboratory of Automobile Simulation and Control Jilin University

To minimize the auto body's posture change caused by steering and uneven road, and improve the vehicle's riding comfort and handling stability, this paper presents an H∞ robust controller of the active suspension system, which considers the effects of different steering conditions on its dynamic performance. The vehicle's vibration in the yaw, roll, pitch and vertical direction and the suspension's dynamic deflection in the steering process are taken into account for the designed H∞ robust controller, and it introduces the frequency weight function to improve the riding comfort in the specific sensitive frequency bands to human body. The proposed robust controller is testified through simulation and steering wheel angle step test. The results show that the active suspension with the designed robust controller can enhance the anti-roll capability of the vehicle, inhibit the changes of the body, and improve the riding comfort of the vehicle under steering condition. The results of this study can provide certain theoretical basis for the research and application of active suspension system.

关键词： vehicle active suspension system steering condition H∞ robust control sensitive frequency bands

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Predictive safety control for road vehicles after a tire blowout

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Science China(Information Sciences) 2018年第7期61卷 101-103页

作者： Fei WANG Hong CHEN Lulu GUO Yunfeng HU State Key Laboratory of Automotive Simulation and Control Jilin University Department of Control Science and Engineering Jilin University

Since driver error is considered a major cause in over 90%of all road crashes[1],driving assistance systems are widely used to improve driving safety,and are an important research direction in the intelligent vehicle *** the rapid development of sensing,identification and communication technologies,the vehicle can obtain an increasing amount of information in real time,ranging from the vehicle status information to road information

关键词： Predictive safety control for road vehicles after a tire blowout

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Path-following control of autonomous ground vehicles using triple-step model predictive control

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Science China(Information Sciences) 2020年第10期63卷 264-266页

作者： Yulei WANG Hongyu ZHENG Changfu ZONG Hongyan GUO Hong CHEN State Key Laboratory of Automotive Simulation and Control Jilin University Department of Control Science and Engineering Jilin University

Dear editor,Autonomous ground vehicles (AGVs) equipped with a variety of advanced sensor systems exemplify the recent advances in modern automobile industry and have been receiving significant research interest from academia to industry owing to their prospect to reduce traffic congestion and traffic *** core feature of AGVs refers to any

关键词： Autonomous ground vehicles Model predictive control path following triple-step control constraints

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Electromagnetic Parameters Matching of Permanent Magnet Synchronous Motor for Hybrid Electric Vehicles

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IFAC-PapersOnLine 2018年第31期51卷 407-414页

作者： Wang, Weihua Fu, Rong Fan, Yongkai State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130025 China

As one of the significant power sources to characterize the driving performance of hybrid electric vehicles (HEVs), the motor parameter matching is an important issue. A simple method is proposed to calculate the electromagnetic parameters of motor considering the influence of field-weakening ratio and saliency ratio on the motor external characteristic. Through analyzing the influence of the saliency ratio and the field-weakening ratio on the external characteristics, the candidate ranges of the saliency ratio and the field-weakening ratio are provided. The result indicates that the actual range of field-weakening ratio ζ is 1.09-1.15 when the saliency ratio is 2.5 and the value of the saliency ratio ρ is 2.00-2.73. Then the electromagnetic parameters of permanent magnet synchronous motor (PMSM) can be acquired, which can meet the power demand of HEV. The electromagnetic parameters are related with the structure parameters to some extent, so the paper can provide references for the structure parameters design of PMSM in HEV. © 2018

关键词： Hybrid vehicles Automobile drivers Permanent magnets Synchronous motors Traction motors Electromagnetic parameters External characteristic Field weakening Hybrid electric vehicles (HEVs) parameters matching Permanent Magnet Synchronous Motor Saliency ratio Structure parameter

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Recent patents on automobile brake tester

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Recent Patents on Mechanical Engineering 2016年第1期9卷 20-25页

作者： Wang, Lianhui Chen, Shuming Jiang, Yang Wang, Dengfeng State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130022 China

With the advancement of safety awareness, the automobile brake tester is widely applied to automobile brake performance testing. The brake tester is composed of four major subsystems: one or more energy supply devices, electric motors, transmission assemblies and a control device. This paper reviews various patents of the automobile brake tester which employs the different devices and structures to obtain new functions in recent years. Compared with the new structures, the traditional brake tester is not versatile, compact and modular. Moreover, it is hard to fix the vehicle on the brake tester. Thus, several kinds of new structures of brake testers have been designed to solve these problems, including the limited function and the complex structure. The new types of brake testers are more compact, simple and versatile. The vehicle can be easily fixed on the brake tester as well. Furthermore, the cost of the brake tester will be reduced by importing the new structures and devices. © 2016 Bentham Science Publishers.

关键词： Patents and inventions

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