Abstract
Keywords: Brake Master Cylinder, Actuation Force, Chamber Pressure, Brake system
This paper aims to develop a passenger car brake system master cylinder simulation model to predict actuation effects at low pressures, taking account of master cylinder component characteristics. This simulation modelling of a brake master cylinder will contribute to better understanding of some of the car brake system `pedal feel´ effects at low actuation pressures. A description of the simulation models is presented, and verification and validation through experimental work carried out on an experimental test rig are described. Results from the test rig are compared with the predicted data and the effects of seal friction and spring rate are discussed. It is demonstrated how the actuation force vs. line pressure characteristic depends on the detail design of the master cylinder and can form the basis for accurate prediction through computer simulation of car brake system actuation characteristics as more system components are developed and added.