Parallel-HEV驱动形式对电液复合制动的影响

Impacts of Parallel-HEV Driving Types on Electro-hydraulic Braking

随着线控制动技术的成熟,电液复合制动能够实现并联式混合动力汽车(PHEV)的前后轮制动力理想分配。为了研究PHEV驱动形式对电液复合制动再生制动回收率的影响,对水平路面上行驶的PHEV进行了理论分析。随后在Matlab/Simulink平台上建立模型,并且嵌入PHEV参数进行仿真验证。结果表明:四轮驱动形式在回收效率上好于两轮驱动形式;前轮驱动形式与后轮驱动形式在回收效率上的优劣取决于整车参数与路面附着系数。

As automotive by-wire control technology matures, the electro-hydraulic braking technique in Parallel Hybrid Electric Vehicles （PHEV） can achieve the goal of ideal braking force distribution in front and rear wheels. In order to discuss the impacts of PHEV driving types on recovery rate of electro-hydraulic regenerative braking, theoretical analysis of PHEV was done on flat and level road. Then the braking models were established on the platform of Matlab/Simulink and at the same time they were simulated with certain parameters. The results indicate that the four wheel drive （4WD） pattern has higher efficiency than the two wheel drive （2WD） in regenerative braking and that whether the front wheel drive （FWD） pattern is better than rear wheel drive （RWD） pattern in regenerative braking depends on the main vehicle parameters and pavement friction coefficient.