A Brake System Coefficient of Friction Estimation Using 3D Friction Maps

Abstract

The coefficient of friction (COF) is one of the core factors in the evaluation of brake system performance. It is challenging to predict the COF, since it is strongly influenced by several parameters such as contact pressure (p), slip rate (v) and temperature (T) that depend on the driving conditions. There is a need for better models to describe how the brake friction varies under different driving conditions. The purpose of this research is to study the possibility of using 3D friction pvT-maps to estimate the COF of a disc brake system under different driving conditions. The 3D friction pvT-maps are created by filtering results of material tests conducted in a mini-dyno inertia bench. The COF measured under different driving cycles in an inertia dyno bench with the full brake system are compared with the COF estimated by the friction maps coming from the reduced scale dyno bench to investigate the validity of the simulation approach. This study shows that mini dyno bench is suitable to obtain a tribological characterization of the friction pad–disc rotor contact pair and is able to replace the full inertia dyno bench to investigate the brake system performance.

A Novel Approach for Brake Emission Estimation based on Traffic Microsimulation, Vehicle System Dynamics, and Machine Learning Modeling

“…In a study conducted by Candeo et al, contact friction and airborne brake wear during a bedding stage for Cu-free brake pads were investigated using the LINK minidyno machine model 1200 (Candeo, Nogueira, et al, 2021). The same dynamometer machine was also used to build brake performance maps in various scorching conditions of brake pads (Candeo, Federici, et al, 2021, Varriale et al, 2022. Compared to full-scale dynamometers, minidynos impose less cost and avoid squandering the running times.…”

Assessing Frictional Performance of Heavy Brake Pad Compounds Through Manta Ray Foraging Optimized Ensemble Tree Approach

“…The transportation and manufacturing sectors insist on more efficiency and dependability of regarding brakes. In addition to assisting in the creation of sophisticated pads, it guarantees that trucks and buses can confirm strict security rules and legal constraints (Varriale et al 2022;Motta et al 2023). The objective of the study is to assess the grip efficiency in pad substances that pay particular attention to the composition of materials, heat conduct and general efficacy in high-duty vehicle brakes.…”