主从型电液耦合载电车辆工作模式分析

Analysis of Operating Mode of Master-Slave Electro-Hydraulic Coupling Electric Vehicle

针对传统电动汽车存在的动力形式单一等问题,本文基于电液动力耦合电动汽车工作原理,对主从型电液耦合载电车辆工作模式进行分析。本文提出一种新型电液动力耦合传动方法,以实现机械能、电能和液压能之间的相互转化,论述了动力耦合系统结构与组成,提出了车辆行驶过程中的6种工作模式,为验证该动力耦合系统的可行性,对各个工作模式下,主从型电液耦合载电车辆系统的电能、机械能、液压能传递和相互转化过程进行分析。分析结果表明,在提出的6种工作模式下,该系统凭借行星齿轮无级调速和功率分流的特点,能够实现3种不同能量之间的相互转化。当车辆行驶时,电能由动力电池传递至驱动电机、电控液压泵/马达等设备,液压能驱动液压泵/马达转动,机械能经行星排动力耦合向驱动桥输出。当车辆制动时,电能向动力电池中回收,液压能向高压蓄能器中回收。该研究具有一定的理论研究和实际应用价值。

Aiming at the problems of single power form existing in traditional electric vehicles,this paper analyzes the working mode of master-slave electro-hydraulic coupling electric vehicle based on the working principle of electro-hydraulic coupling electric vehicle.In this paper,a new electro-hydraulic power coupling transmission method is proposed to realize the mutual conversion of mechanical energy,electrical energy and hydraulic energy.The structure and composition of the power coupling system are discussed,and six working modes are proposed in the process of vehicle driving.In order to verify the feasibility of the power coupling system,the process of electric energy,mechanical energy and hydraulic energy transfer and mutual conversion of master-slave electro-hydraulic coupling electric vehicle system is analyzed.The analysis results show that under the six working modes proposed,the system can realize the mutual conversion of three different energies by virtue of stepless speed regulation and power shunt of planetary gear.When the vehicle is running,electric energy is transferred from the power battery to the drive motor,electronic control hydraulic pump/motor and other equipment.Hydraulic energy drives the hydraulic pump/motor to rotate,and mechanical energy is output to the drive axle through the coupling of planetary platoon power.When the vehicle is braking,electrical energy is recovered to the power battery,and hydraulic energy is recovered to the high-pressure accumulator.This research has certain theoretical research and practical application value.