Electronically controllable brake actuation system

US5758930A · kind A · utility

Assignee

• ITT Automotive Europe GmbH · DE

Inventors

• Lothar Schiel · Hofheim, DE
• Ulrich Neumann · Roßdorf, DE
• Hans-Jörg Feigel · Rosbach, DE
• Andreas Klen · Bad Homburg vor der Höhe, DE

Key dates

• Filing date: Oct 30, 1996
• Grant date: Jun 2, 1998
• Expiry date: Oct 30, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S303/04
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An electronically controllable anti-lock brake actuation system for automotive vehicles, including a pedal actuated dual-circuit master brake cylinder, and braking pressure generators actuatable by an electronic control unit. Each of the braking pressure generators has a piston slidable in a cylinder bore from an initial position, each piston separating a first working chamber, to which each one wheel brake of the vehicle is connected directly and the master cylinder is connected by way of a closable hydraulic connection, from a second working chamber and is connected to the master cylinder where the stepped piston is operable to achieve a braking pressure generation or boosting. In one embodiment, first and second electromagnetically operable separating valves are inserted in the connection between the first working chamber and the master brake cylinder, the connection between the master brake cylinder and the second working chamber being effected exclusively by way of the second separating valve, and the initial position of the stepped piston permits a return stroke in opposition to its actuating direction. In another embodiment, no connection exists between the first working cha…