Brake system

US4904026A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfgang Bernhardt · Ditzingen, DE
• Michael Tischer · Abstatt, DE

Key dates

• Filing date: Oct 7, 1988
• Grant date: Feb 27, 1990
• Expiry date: Oct 7, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/4004
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A brake system having a master brake cylinder with at least one piston in a stepped bore in which the piston is acted upon at one end by a piston rod and on the other end defines a pressure chamber, from which an outlet or a brake line leads to wheel brake cylinders of at least one brake circuit. The pressure chamber, or the brake line discharging from this pressure chamber communicates on the one hand with a compensation chamber and on the other with an annular chamber, the volumes of both these chambers being variable contrarily by movement of the piston. The connection between the pressure chamber and the compensation chamber is interrupted by a valve, and a connection is then established with a fluid reservoir. A suitable amount of fluid can then be transported from this fluid reservoir into the compensation chamber by means of a return pump.