Anti-skid brake system for a vehicle

US5125721A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Guenther Schmidt · Tauberbischofsheim, DE
• Roland Holzmann · Heubach, DE
• Alfred Sigl · Tokyo, JP
• Karl-Heinz Willmann · Glückstadt, DE
• Wolf-Dieter Jonner · Freising, DE

Key dates

• Filing date: Feb 14, 1991
• Grant date: Jun 30, 1992
• Expiry date: Feb 14, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/50
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A vehicle brake system having at least two brake pressure lines, via which a master brake cylinder communicates with wheel brake cylinders, at least one valve is incorporated in each brake pressure line to close the brake pressure lines in the event of anti-skid control. Each brake pressure line is also assigned a return pump, which bypasses the valve. At least one valve, in the currentless state or with the absence of pressure buildup in a brake pressure line, blocks this brake pressure line and communicates with a control unit for pulsed opening upon pressure buildup in the brake pressure line. Because of the additional disposition of a pressure valve and check valve in a bypass around the pulsed valve, expensive pressure reducers are dispensed with, with little additional expense in the anti-skid control system. Even if the anti-skid control system fails, stability during braking is assured.