制动液对制动拖滞的影响分析与仿真

摘要

分析了制动液粘度、温度、吸水性、气阻等因素对制动拖滞的影响,总结了制动液粘度与制动拖滞间的关系.运用MSC.EASY5液压仿真软件对制动系统进行了虚拟建模,实现对制动过程的虚拟仿真,从活塞位移的角度对制动拖滞进行了分析.结合现有的试验台架,选取了与现用油沸点相近的几种型号制动液进行了拖滞力矩试验,其中重点分析了制动液粘度对制动拖滞的影响.归纳总结出制动液相关参数对制动拖滞的影响规律.%The influence factors of brake drag,such as brake fluid viscosity,temperature,hydroscopicity,vapor lock are all analyzed,and the relationships between brake fluid viscosity and brake drag are concluded.Using the hydraulic simulation software MSC.EASY5,the visual braking process model of brake system is built,the braking process is simulated,and the brake drag from the angle of the piston displacement is analyzed.Using the existed bench test,the brake drag experiment is made by selecting several brake fluid that the boiling point is close to inuse oil,focused on analyzing the influence of brake viscosity on brake drag.The influence of configuration of brake fluid to brake drag is obtained.