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Fuel consumption reduction effect of pre-acceleration before gliding of a vehicle with free-wheeling

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Control Theory and Technology 2022年第2期20卷 235-247页

作者： Wenjing Cao Taketoshi Kawabe Tsuyoshi Yuno Xiaoliang Huang Department of Engineering and Applied Sciences Faculty of Science and TechnologySophia UniversityTokyoJapan Graduate School and Faculty of Information Science and Electrical Engineering Kyushy UniversityFukuokaJapan Department of Electrical Engineering Chalmers University of TechnologyGothenburgSweden

Advanced fuel economy strategies are expected to reduce the fuel consumption of *** internal combustion engine(ICE)driving vehicle equipped with free-wheeling turns off the fuel injection and decouples the engine from the drivetrain when the driving force is not *** paper proposes a method to reduce the fuel consumption of a vehicle equipped with ***,an optimization problem is formulated to minimize the fuel consumption of a vehicle with free-wheeling when the traveling distance,the initial and final speed are specified and the vehicle needs to glide before arriving at the end point for fuel *** speed profile of the vehicle,engine operating point,and engine on/off timing are obtained as the results of the *** analytical and numerical analyses results demonstrate the effectiveness and the fuel-saving mechanism of the obtained speed *** main finding of the analyses is that rather than starting a gliding stage immediately after an acceleration or a constant speed stage,adding a pre-acceleration stage before the gliding stage is more fuel-economic under some conditions independent of the complexity of the vehicle *** obtained speed profile including a pre-acceleration stage is applied to a driving scenario including traffic *** results demonstrate the effectiveness of the pre-acceleration stage in reducing fuel consumption for a vehicle equipped with free-wheeling.

关键词： powertrain Free-wheeling Speed profile Operational mode of engine Fuel economy Nonlinear optimization

An overview of various control benchmarks with a focus on automotive control

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Control Theory and Technology 2019年第2期17卷 121-130页

作者： Lars ERIKSSON Vehicular Systems Department of Electrical EngineeringLinkoping UniversitySE-581 83 LinkopingSweden

There exists a gap between control theory and control practice,i.e.,all control methods suggested by researchers are not implemented in real systems and,on the other hand,many important in dustrial problems are not studied in the academic *** problems can help close this gap and provide many opportunities for members in both the controls theory and application *** goal is to survey and give pointers to different general controls and modeling related benchmark problems that can serve as inspiration for future benchmarks and then specifically focus the benchmark coverage on automotive control engineering *** the paper reflections are given on how different categories of benchmark designers,benchmark solvers and third part users can benefit from providing,solving,and studying benchmark *** paper also collects information about several benchmark problems and gives pointers to papers than give more detailed information about different problems that have been presented.

关键词： Benchmark automotive control robust control robotics engine control powertrain control system identification

Review of bidirectional DC–DC converter topologies for hybrid energy storage system of new energy vehicles

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Green Energy and Intelligent Transportation 2022年第2期1卷 33-50页

作者： Jiulong Wang Bingquan Wang Lei Zhang Jianjun Wang NIShchurov BVMalozyomov School of Electrical and Electronic Engineering Harbin University of Science and TechnologyHarbin 150080China Department of Electro-technical Complexes Novosibirsk State Technical UniversityNovosibirsk 630073Russia

New energy vehicles play a positive role in reducing carbon *** improve the dynamic performance and durability of vehicle powertrain,the hybrid energy storage system of“fuel cell/power battery plus super capacitor”is more used in new energy *** DC–DC converters with wide voltage conversion range are essential for voltage matching and power decoupling between super capacitor and vehicle bus,helping to improve the low input voltage characteristics of super capacitors and realize the recovery of feedback *** recent years,the topologies of bidirectional converters have been widely investigated and *** to obtain bidirectional DC–DC converters with wide voltage conversion range suitable for hybrid energy storage system,a review of the research status of non-isolated converters based on impedance networks and isolated converters based on transformer are ***,an evaluation system for bidirectional DC–DC topologies for hybrid energy storage system is constructed,providing a reference for designing bidirectional DC–DC *** performance of eight typical non-isolated converters and seven typical isolated converters are comprehensively evaluated by using this evaluation *** this basis,issues about DC–DC converters for hybrid energy storage system are discussed,and some suggestions for the future research directions of DC–DC converters are *** optimization of bidirectional DC–DC converters for hybrid energy storage system from the perspectives of wide bandgap device application,electromagnetic compatibility technology and converter fault diagnosis strategies is the main research direction.

关键词： New energy vehicle Hybrid energy storage system powertrain Research trend Reducing carbon emission

Optimal tracking control for automatic transmission shift process

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Journal of Beijing Institute of Technology 2015年第4期24卷 458-465页

作者：万国强李克强裴玲黄英张付军 State Key Laboratory of Automotive Safety and Energy Tsinghua University Laboratory for Integrated Power System Technology Beijing Institute of Technology

In order to improve the shift quality, a linear quadratic optimal tracking control algorithm for automatic transmission shift process is proposed. The dynamic equations of the shift process are derived using a Lagrange method. And a powertrain model is built in the Matlab/Simulink and veri- fied by the measurements. Considering the shift jerk and friction loss during the shift process, the tracking trajectories of the turbine speed and output shaft speed are defined. Furthermore, the linear quadratic optimal tracking control performance index is proposed. Based on the Pontryagin＇ s mini- mum principle, the optimal control law of the shift process is presented. Finally, the simulation study of the 1 - 2 upshift process under different load conditions is carried out with the powertrain model. The simulation results demonstrate that the shift jerk and friction loss can be significantly re- duced by applying the proposed optimal tracking control method.

关键词： powertrain automatic transmission shift process optimal tracking control

The design analyze of new hybrid drive concept

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High Technology Letters 2010年第1期16卷 45-51页

作者： Szumanowski Antoni Chang Yuhua The Faculty of Automotive and Construction Machinery Engineering Warsaw University of Technology Narbutta 84 02-524 Warsaw Poland

This paper presents the design method of hybrid drive system for the minibus with some limited conditions. The approach of design hybrid drive system is based on the dynamic modeling and simulation of the hybrid minibus with planetary gear system. The main target of the design is to obtain the optimal design with the proper hybrid drive configuration and control for a given set of design constraints. In oder to meet the design target, it＇s necessary to adjust some parameters such as mechanical ratios and parameters of battery pack as well as control by simulation. During simulation the transient operating process can be studied in details with the dynamic model in Matlab/Simulink. The control strategy can be optimized by running the simulation and monitoring the operation of each components： the operating area of internal combustion engine （ICE）, fuel consumption （energy consumption）, the power distribution, the torque and rotary speed of ICE and motor, the operating efficiency of motor, the aheration of battery state of charge （SOC）, current and voltage.

关键词： hybrid drive vehicle powertrain simulation vehicle performance energy consumption

Comprehensive lumped parameter and multibody approach for the dynamic simulation of agricultural tractors with tyre–soil interaction

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IET Cyber-Systems and Robotics 2023年第3期5卷 1-23页

作者： Massimo Martelli Damiano Chiarabelli Silvia Gessi Pietro Marani Emiliano Mucchi Marco Polastri Institute of Sciences and Technologies for Sustainable Energy and Mobility CNR‐STEMSNational Research CouncilFerraraItaly Department of Engineering University of FerraraFerraraItaly

Modern agricultural tractors are complex systems,in which multiple physical(and technological)domains interact to reach a wide set of competing goals,including work operational performance and energy *** complexity translates to the dynamic,multi‐domain simulation models implemented to serve as digital twins,for rapid prototyping and effective pre‐tuning,prior to bench and on‐field ***,a suitable simulation framework should have the capability to focus both on the vehicle as a whole and on individual *** each of the latter,multiple options should be available,with different levels of detail,to properly address the relevant phenomena,depending on the specific focus,for an optimal balance between accuracy and computation *** methodology proposed here by the authors is based on the lumped parameter approach and integrates the models for the following subsystems in a modular context:internal combustion engine,hydromechanical transmission,vehicle body,and tyre–soil *** model is completed by a load cycle module that generates stimulus time histories to reproduce the work load under real operating *** capability is affected by vertical load on the wheels,which is even more relevant if the vehicle is travelling on an uncompacted soil and subject to a variable drawbar pull force as it is when *** vertical load is,in turn,heavily affected by vehicle dynamics,which can be accurately modelled via a full multibody *** presented lumped parameter model is intended as a powerful simulation tool to evaluate tractor performance,both in terms of fuel consumption and traction dynamics,by considering the cascade phenomena from the wheel–ground interaction to the engine,passing through the dynamics of vehicle bodies and their mass *** capabilities and numerical results are presented for the simulation of a realistic ploughing operation.

关键词： agricultural tractor digital twin lumped parameter simulation,multibody powertrain tyre-soil interaction

汽车的自动驾驶、电池管理、动力传动系以及充电桩的相关技术导向

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电子产品世界 2016年第8期23卷 13-19页

作者：王莹王金旺《电子产品世界》编辑部

本文从ADAS(高级驾驶辅助系统)、M电池管理、M powertrain(动力传动系)以及充电桩四个方面分Y析了当下传统Y汽车和新能源汽车的相关技术的发展情况,并邀CM请专业技术专CM MY MY家探讨了汽车行业的技术变革的挑战和发展思路。CY

关键词： ADAS 电池管理 powertrain 充电桩

Investigation on the Gearbox Radiated Noise Optimization under Acceleration Conditions of Electric Bus Based on Gear Micro-Modification Methods

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Investigation on the Gearbox Radiated Noise Optimization und...

2019中国汽车工程学会年会

作者： Chen Yong Qiu Ningning Liu Hai Yu Miao Wei Changyin Hebei University of Technology

Because of the superior advantages of electric bus on energy saving and emission reduction than the traditional diesel bus,the electric buses are widely used in short-distance travel and urban public ***,during the use of the electric bus,according to the reflection of the passengers and the drivers,the noise was abnormal under the two-gear and the three-gear acceleration *** with the traditional diesel bus,the gearbox noise of electric bus is more prominent due to time varying loads effect and the absence of diesel engine masking effect under the acceleration condition,which deteriorates the NVH characteristics of the whole ***,the gearbox of electric bus is researched as an object in this *** test results showed that the radiated noise of the gearbox under the three-gear acceleration condition was significantly higher than the two-gear acceleration condition,and the meshing noise of the shifting gear of the three-gear was found to be the main source of the gearbox radiation noise under the three-gear acceleration condition by order analysis,so the shifting gears of the three-gear were optimized as an *** this paper,the boundary element radiation noise model has been established in the acoustic radiation software,and the radiated noise model has been verified by the bench test under the three-gear acceleration *** order to optimize the gearbox radiated noise under the three-gear acceleration condition,method of gear microscopic modification has been used to optimize the transmission error（TE） and the radiated noise.

关键词： gearbox powertrain electric bus the acceleration condition order analysis

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不同动力总成对整车油耗影响的对比分析

不同动力总成对整车油耗影响的对比分析