重型商用车辆轮毂液驱系统的驱动特性

Driving performance of hub-motor hydraulic driving system for heavy commercial vehicles

在传统重型车辆的基础上,添加液压集成泵、轮毂马达、蓄能器等液压元件,形成一种新型轮毂液驱辅助驱动前桥系统,增加了整车更多功能以适应重型商用车的使用环境。利用MATLAB/Simulink和AMESim软件,搭建了轮毂液驱重型车的离线仿真平台,验证了泵-马达助力和蓄能器-马达助力的动力性能。仿真结果表明,蓄能器的辅助驱动适合在短行程内短时地提供辅助驱动力,而液压泵助力可以在更大行程内稳定持续地提供辅助驱动力。本文开发的液驱系统兼具两者的优点,对于重型车辆轮毂液驱系统的开发与应用具有重要参考意义。

A hydraulic hub-motor auxiliary system was built to fit the operating conditions of heavy commercial vehicles. In this system, hydraulic components, including hydraulic pump, hub-motors and accumulator, were added on a traditional heavy truck. A off-line simulation platform was built using MATLAB/Simulink and AMESim to test the power performance of pump-motor auxiliary and accumulator-motor auxiliary. Results show that the auxiliary power from the accumulator is suitable for providing assistant driving force for short trips with short time, and the pump-motor auxiliary system could provide constant driving force for longer trips. The work that compares different applicable conditions of the two modes has obvious guiding significance for the development and application of hydraulic hub-motor auxiliary system for heavy trucks.