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Reducing Operation Emissions and Improving Work Efficiency Using a Pure Electric Wheel Drive Tractor

Engineering 2024年第6期37卷 230-245页

作者： Chang-Kai Wen Wen Ren Qing-Zhen Zhu Chun-Jiang Zhao Zhen-Hao Luo Sheng-Li Zhang Bin Xie Zhi-Jun Meng Research Center of Intelligent Equipment Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China State Key Laboratory of Intelligent Agricultural Power Equipment Beijing 100097China BYD Company Limited Shenzhen 518118China College of Agricultural Engineering Jiangsu UniversityZhenjiang 212013China College of Engineering China Agricultural UniversityBeijing 100083China

In response to the problems of excessive greenhouse-gas and particulate emissions and the low traction efficiency of conventional diesel tractors in the field,a purely electric wheel-side drive tractor was studied,including an electric motor drive system,a battery ballast system,and an electro–hydraulic suspension *** paper develops a dynamics model of an electric tractor-ploughing unit under complex soil conditions,leading to the proposal of an active control method for drive wheel torque and a joint control method for the traction force of the suspension system and the front-and rear-axle loads of a ***,the tractor is prototyped and assembled,and ploughing tests are carried *** ploughing results show that the active torque-distribution control method proposed in this study reduces the tractor slip by 14.83%and increases the traction efficiency by 10.28%compared with the average torquedistribution *** with the conventional traction control mode,the joint control method for traction and ballast proposed in this paper results in a 3.7%increase in traction efficiency,a 15.05%decrease in slip,and a 4.9%reduction in total drive motor energy *** study will help to improve the operation quality and traction efficiency of electric tractors in complex soil conditions.

关键词： Electric tractor Ploughing unit Torque distribution Active ballast traction performance

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performance analysis and test of a maize inter-row self-propelled thermal fogger chassis

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International Journal of Agricultural and Biological Engineering 2018年第5期11卷 100-107页

作者： Liqing Chen Pinpin Wang Peng Zhang Quan Zheng Jin He Qingjie Wang College of Engineering Anhui Agricultural UniversityHefei 230036China Anhui Intelligent Agricultural Machinery Equipment Engineering Laboratory Hefei 230036China College of Engineering China Agricultural UniversityBeijing 100083China

In view of the difficulties in weeding and plant protection in the middle and late period of maize planting,this paper proposed a self-propelled thermal fogger *** to the theoretical calculation and agronomic requirements for maize planting,the structure and working principles of the self-propelled thermal fogger chassis were *** this basis,the multi-body dynamics model of chassis structure was established,and the chassis traction,steering and obstacle surmounting performances were also *** the rationality and the feasibility of the design were verified through the furrow running test and test equipped with thermal *** results showed that,the traction performance improves with the decrease of soil deformation index and increase of cohesion,and when track pre-tensioning force was about 1000 N,the machine had a good traction performance;with the decrease of the soil deformation index and the increase of cohesive force,the stability of the single side brake turn of the chassis becomes better;on the contrary,with the increase of the tightness of the crawler,the steering radius turns smaller and the steering stability becomes *** heavy clay,with the pre-tensioning of 1000 N,the machine has better steering stability and smaller turning *** obstacle-surmounting simulation result shows that on sandy soil road,the maximum climbing angle for the chassis is 42°,the height of vertical obstacle crossing is 170 mm and the trench width is 440 *** study provides a reference for the design of plant protection machinery in the middle and late stages of maize planting.

关键词： maize inter-rows intelligent chassis traction performance steering performance obstacle surmounting performance

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Powertrain parameter matching and optimal design of dual-motor driven electric tractor

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International Journal of Agricultural and Biological Engineering 2019年第1期12卷 33-41页

作者： Yanni Chen Bin Xie Yuefeng Du Enrong Mao College of Engineering China Agricultural UniversityBeijing 100083China

The rationality of powertrain parameter design has a significant influence on the traction performance and economic performance of electric *** present,researches on powertrain parameter design mainly focus on electric vehicles,and electric agricultural machinery draw much less ***,a method of powertrain parameter matching and optimization design for electric tractor was proposed in this paper,which was based on dual-motor coupling drive *** particle swarm optimization(PSO)algorithm based on mixed penalty function was used for parameter *** optimization design was programmed using MATLAB.A simulation dynamic model with optimization design variables of electric tractor powertrain was established based on MATLAB/*** with the simulation results before optimization,the objective functions were optimized and the traction performance of electric tractor was improved,which indicated the effectiveness of the proposed method.

关键词： electric tractor parameter matching design parameter optimization design powertrain traction performance

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Investigation to Simulation of the Vehicle Ramp traction Based On Numerical Calculation of Tire

Investigation to Simulation of the Vehicle Ramp Traction Bas...

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2009中国控制与决策会议

作者： Tao Liu~1,Juan-juan Chen~1,You-shan Wang~2,Yue-ying Zhu~1 1.School of Automobile Engineering,Harbin Institute of Technology,Weihai,264209,China 2.Research institute of composite material and structure,Harbin Institute of Technology,Harbin,150080,China

In order to improve the practicality and accuracy of simulation on vehicle traction performance,the simulation models of tire on vehicle traction performance are built by using three-dimensional finite element analysis,and on this basis the traction performance characteristics on entire vehicle are *** at a four-wheel-drive vehicle,the mathematical models about the accelerated process are built,the dynamic simulations are carried out in Simulink simulation environment,and a comparative analysis with the simulation results on bilinear tire model is put *** results of the analysis show that:it can effectively reflect the vehicle actual accelerated process by the simulation analysis of vehicle traction performance in which the tire models are built by the tire numerical calculation *** the simulation analysis for accelerated process of the typical four-wheel-drive vehicle,the effectiveness of this method is verified.

关键词： Automotive engineering traction performance Simulation Tire model

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