Abstract:

The frequency of high-speed solenoid valve of circulating HCU affected brake experience. In order to solve this problem, this paper presented a variable volume HCU based on ABS-VI. Vehicle dynamics model was set up in MATLAB/Simulink, simultaneously the HCU model was set up in AMESim. And then the regulator performance and ABS function were co-simulated. Simulation results show that: this HCU has a wide range of brake pressure, and the wheel cylinder pressure can exceed the master cylinder pressure; the HCU and logic threshold control strategy can achieve ABS function; the voltage threshold value of regulator motor has effects on ABS performance.

Key words: variable volume hydraulic control unit(HCU), circulating HCU, AMESim/Simulink co-simulation, logic threshold value

摘要：

循环式HCU高速开关阀开关频率高，影响制动感受。为解决该问题，基于ABS-VI设计了可变容积式HCU，利用MATLAB/Simulink建立了车辆动力学模型，并利用AMESim建立了HCU模型。对可变容积式HCU的调压性能和ABS功能进行了联合仿真，并将其与循环式HCU进行了对比。仿真结果表明：所设计的HCU调压范围大，轮缸压力可超过主缸压力；该HCU和逻辑门限值控制策略能实现ABS功能；调压电机电压门限值对ABS性能有影响。

关键词: 可变容积式HCU, 循环式HCU, AMESim/Simulink联合仿真, 逻辑门限值