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:
May. 04, 1993
Filed:
Mar. 25, 1991
Harry Troster, Tamm, DE;
Mercedes-Benz AG, , DE;
Abstract
In a drive-slip control device (ASR) and anti-lock system (ABS) in a road vehicle with a hydraulic multi-circuit brake system, the return-flow pump assigned to the brake circuit of the driven vehicle wheels is used as an auxiliary pressure source for the ASR. The discharge of a pressure accumulator connected to the return line of the brake circuit of the driven vehicle wheels, after the conclusion of a drive-slip control phase, is achieved when the return-flow pump continues to be maintained in the conveying mode for a delay time commencing with the disappearance of the situation requiring control. The ASR control valve provided for shutting off the brake unit from the main brake line of the brake circuit of the driven vehicle wheels is maintained in its closing position assigned to the ASR mode. A pressure relief valve is connected in parallel with the ASR control valve. For the variable presetting of the delay time, a buffer accumulator is equipped with a pressure monitor. The output signal characteristic of the relieved buffer accumulator is used for limiting the delay time.