The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1992
Filed:
Feb. 28, 1991
Applicant:
Inventors:
Allen J Walenty, Mt. Clemens, MI (US);
George N Villec, Ann Arbor, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T / ; B60T / ; B60T / ; G06F / ;
U.S. Cl.
CPC ...
303 95 ; 303 20 ; 303100 ; 303 91 ; 303104 ; 36442602 ;
Abstract
A vehicle parking brake system automatically adapts to the road surface condition when operated while the vehicle is moving. The parking brake pressure is automatically controlled, in response to an operator command to initiate the parking brake function or in response to a failure of the hydraulic front brakes while the vehicle is moving, to establish and limit wheel slip at a desired controlled slip between each of the braked wheels and the road surface so as to automatically adapt to the road surface coefficient of friction.