Browse Publications Technical Papers 2012-01-1897

Impact of Pad Wear on the Pressure Dynamics of a Vehicle Braking System 2012-01-1897

A vehicle braking system is used to provide acceptable drivability of the vehicle and ensure safety in different emergency situations that the vehicle may encounter. The braking system is used also as an integrated sub-system in many other important vehicle driving systems such as traction control, adaptive cruise control, accident avoidance and other vehicle systems in which the braking system plays an important role. This paper is dedicated to provide an accurate and at the same time simple enough hydro-mechanical braking system mathematical model that takes brake pad wear impact on the system pressure dynamics into consideration. A wear simulation procedure based on the concept of Archard's wear law is used and integrated in the nonlinear braking system model with flow compressibility taken into consideration. The presented model simulation results and the experimental tests results show good agreement and validate the confidence in the proposed model. Also, a reduced order model of the full nonlinear one is presented. Both the full nonlinear model and the reduced order model show that increasing in the brake pad wear level increases the pressure spikes dynamics at the contact surface between brake pad and rotor disc and hence could leads to brake squeal and shortens the braking pad service life.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Prediction of Brake System Performance during Race Track/High Energy Driving Conditions with Integrated Vehicle Dynamics and Neural-Network Subsystem Models


View Details


CFD-CAE Multi-Physics Simulation Approach for Brake Disc Thermal Coning


View Details


Stability Analysis of a Disc Brake with Piezoelectric Self-Sensing Technique


View Details