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Vehicle Brake Balance Using Objective Brake Factors
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1989 by SAE International in United States
Annotation ability available
Harmonization of passenger car brake regulations FMVSS 105 and ECE R13 has been pursued for more than eight years. Among the challenges facing this effort are the distinct characteristics of self certification and type approval regulatory protocols, and the differing emphasis of the two existing regulation, i.e., FMVSS 105 focuses on stopping distances while ECE R13 has vehicle brake balance as a primary thrust. Most recently the principal interest of the harmonization effort has been to identify a single method for the certification of vehicle brake balance suitable for use in both self certification and type approval environments.
A test procedure and analysis protocol based on torque wheel tests of individual specimen vehicles has been developed and demonstrated to be both objective and practicable for certification purposes. This method for determining objective brake factors (OBF) offers significant advantages over several other proposals including preserving the form of the current brake balance regulatory provisions of Annex 10 of ECE R13, an independence from prevailing tire, road, and driver influences, and a rational means for dealing with the inevitable stop to stop variability in vehicle brake balance.
CitationFlaim, T., "Vehicle Brake Balance Using Objective Brake Factors," SAE Technical Paper 890804, 1989, https://doi.org/10.4271/890804.
- General Motors Corporation Response to Docket No. 85-06, Notice 1 Proposed FMVSS 135 Passenger Car Brake Systems, USG 2456 13 January 1986
- Wolanin M.J. Baptist T.A. Road Transducer - Objective Brake Balance Measurement Without Vehicle Instrumentation SAE 870266 1987
- Flaim T.A. Smith J.S. Objective Testing for Vehicle Brake Balance 1987 Experimental Safety Vehicle Conference Washington, D.C. Conference Proceedings 27 April 1987
- General Motors Corporation Response to Docket No. 85-06, Notice 4 Proposed FMVSS 135 Passenger Car Brake Systems, USG 2456, Part V 13 October 1987
- General Motors Corporation Response to Docket No. 85-06, Notice 4 Proposed FMVSS 135 Passenger Car Brake Systems, USG 2456, Part VII 20 April 1988