Brake system with slip control

US4685747A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Juan Belart · Walldorf, DE
• Jochen Burgdorf · Mühlheim am Main, DE
• Lutz Weise · Mainz, DE
• Wolfram Seibert · Darmstadt, DE

Key dates

• Filing date: Jan 27, 1986
• Grant date: Aug 11, 1987
• Expiry date: Jan 27, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S303/901
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A brake system with slip control comprises a conventional braking pressure generator (1), for example a master cylinder (2) with a vacuum-type booster (3) connected before it. An auxiliary pressure control valve (23) is provided whose control inlet port (21) is connected with a pressure chamber (9) of the master cylinder. As the slip control action starts, a hydraulic pump (26) is put into operation which causes an auxiliary pressure proportional to the pedal force to be built up by means of the control valve (23). The auxiliary pressure causes hydraulically actuatable valve arrangements (27, 28, 45, 46) to be switched over and thus the auxiliary pressure supply system (23, 26) instead of the master cylinder (2) to be connected with the wheel brakes (31 to 34). Simultaneously, the brake circuits (I, II) of the master cylinder are cut off and thus a further displacement of the master cylinder pistons (6, 7) is prevented.