Anti-skid brake control system

US5112115A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Karl-Heinz Willmann · Glückstadt, DE
• Dietmar Rischen · Ditzingen, DE
• Wolf-Dieter Jonner · Freising, DE

Key dates

• Filing date: Oct 31, 1990
• Grant date: May 12, 1992
• Expiry date: Oct 31, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/145
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In a known anti-skid control system having a brake booster, a servo piston is followed in the actuating direction by a restoring piston. After a partial stroke, the servo piston can reach the restoring piston and displace it. This arrangement is disadvantageously long. In the brake booster proposed here, a restoring piston is displaceably disposed inside the guide bore. This piston has a bottom and bordering on its a cylinder wall open toward the brake pedal. This wall forms a cylinder jacket in which the servo piston is displaceable. The servo piston executes a part of its working stroke at a variable distance from the bottom of the restoring piston. From the time of contact with the restoring piston, the servo piston executes a further working stroke together with the restoring piston, if necessary.