Wear Test Procedure on Inertia Dynamometer for Brake Friction Materials
- Ground Vehicle Standard
Harmonization with SAE J2789 for inertia calculation and with SAE J2986 for wear measurements.
Expansion of the wear versus temperature (Method A) includes temperatures below 100 °C for friction materials with ferrous metals and decelerations below 0.3 g. These updates reflect normal customer usage and field measurements using the worldwide harmonized light vehicle test procedure (WLTP) adapted for a brake duty cycle.
Extension of the block wear test (Method B) with separate temperatures for front and rear brakes and lower energy levels.
Common burnish schedule for all test methods to ensure consistent conditioning in preparation for the actual wear test. The new burnish method harmonizes with the FMVSS 135 burnish, common in other inertia dynamometer tests.
Data Sets - Support Documents
|Unnamed Dataset 1|
|Table 1||Symbols and abbreviations|
|Table 2||Overview and applicability of different wear test methods|
|Table 3||General wear tests (A1)|
|Table 4||General wear test at low deceleration (A2)|
|Table 5||High-speed wear test (A3)|
|Table 6||High energy block wear test (B1)|
|Table 7||Moderate energy block wear test (B2)|
The Brake Dynamometer Standards Committee is part of the Foundation Brake Steering Committee that reports to the Motor Vehicle Council. The committee is responsible for developing standards, recommended practices, and information reports for brake dynamometer testing, for on-road vehicles below 4540 kg of Gross Vehicle Weight Rating. The committee also maintains liaison activities with other Standard Development Organizations or industry consortia.