Anti-lock brake system with traction slip control

US4840436A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Jochen Burgdorf · Mühlheim am Main, DE
• Hans-Dieter Reinartz · Frankfurt am Main, DE
• Lutz Weise · Mainz, DE
• Norbert Ocvirk · Offenbach, DE
• Horst Becker · Frankfurt am Main, DE
• Otto Determann · Darmstadt, DE

Key dates

• Filing date: Oct 22, 1987
• Grant date: Jun 20, 1989
• Expiry date: Oct 22, 2007

Classification

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

Abstract

An anti-lock brake system with traction slip control includes a pedal-actuated, auxiliary-force-assisted braking pressure generator having a master cylinder to which the wheel brakes are connected by main brake lines, auxiliary-pressure hydraulic pumps, wheel sensors and electronic circuits for determining the wheel rotational behavior and for generating electric braking-pressure control signals which, for the purpose of brake slip control, serve to control electromagnetically actuatable pressure-fluid inlet valves and outlet valves provided in the pressure-fluid lines. Pistons of the master cylinder include central control valves which, in the brake's release position, open pressure-fluid connections between the pressure-fluid supply reservior and the pressure chambers and which, in the braking position, close the pressure-fluid connections. The brake lines communicate through supply lines with the pumps. Valves are provided in the pressure-fluid lines connecting the master cylinder to the pressure-fluid supply reservoir and prevent return flow of the pressure fluid out of the pressure chambers of the master cylinder when traction slip control is performed.