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:
Jun. 25, 1991
Filed:
Dec. 26, 1989
Reinhard Resch, Stuttgart, DE;
Daimler-Benz AG, , DE;
Abstract
A drive-slip control device (ASR) for a road vehicle also equipped with an anti-lock system (ABS) that works on the return-flow principle. The ASR works on the principle of decelerating a vehicle wheel tending to spin by subjecting its wheel brake to pressure. During the drive-slip control mode, the return pump of the ABS, has its inlet supply take place via a precharging pump as an auxiliary-pressure source. By an ASR control valve, the affected brake unit can be shut off from the main brake line of the brake circuit of the driven vehicle wheels. A valve arrangement, which is activatable by the output pressure of the precharging pump is provided to connect the outlet non-return valve of the precharging pump, and the ASR outlet valve (connected between the brake-fluid reservoir and the return line) to a pressure-medium line subjected to brake pressure for normal braking. In the drive-slip control mode, the valving arrangement connects the pressure-medium line to the return line and the outlet of the precharging pump to the inlet of the return pump of the brake circuit. A fault detection device is also provided.