Anti-lock brake system for automotive vehicles

US5167441A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Juergen Schonlau · Eltville am Rhein, DE
• Alfred Birkenbach · Hattersheim, DE
• Rudolf Cezanne · Hofheim, DE
• Rudolphy Heuer · Friedrichsdorf, DE

Key dates

• Filing date: Nov 13, 1990
• Grant date: Dec 1, 1992
• Expiry date: Nov 13, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T15/028
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An anti-locking brake system for automotive vehicles, comprising a tandem master cylinder (1), a device (3, 4) for modulating the pressure supplied to the wheel brakes, an anti-locking control device (2) including a pressure reducing valve (10) located in the rear-axle brake circuit (7). The pressure reducing valve can be activated only in the event of failure of the anti-locking device. To attain a particularly simple and compact design of the re-switchable brakes force distributor (10, 110), an electromagnetic drive (21, 25, 121, 125) is provided and includes an actuating element (20, 120) through which pressure is directly applicable to the valve closing member (16, 116) of the pressure reducing valve (14, 15, 16, 114, 115, 116). To ensure the pressure reducing function even in the event of a failure of the anti-locking device during a brake actuation, an additional arrangement (134, 135, 136) for the volume expansion is provided.