Electrohydraulic brake system for motor vehicles

US6817681B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Wolfgang Fey · Niedernhausen, DE
• Georg Fachinger · Limburg, DE
• Mario Engelmann · Rheinböllen, DE
• Andreas Klein · Bonn, DE
• Peter Schubert · Kaarst, DE

Key dates

• Filing date: Dec 18, 2002
• Grant date: Nov 16, 2004
• Expiry date: Dec 18, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/686
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to an electro-hydraulic brake system for motor vehicles which is controllable in a ‘brake-by-wire’ operating mode by the vehicle operator as well as independently of the vehicle operator, and which can be operated in a back-up operational mode where only operation by the vehicle operator is possible. The brake system includes an emergency pressure generator or master brake cylinder which has at least one pressure chamber and is operable by way of a brake pedal, and a hydraulic auxiliary pressure source whose pressure is used to act upon wheel brakes that are connectable to the master brake cylinder by way of at least one hydraulic connection closable by a separating valve, as well as an electronic control and regulating unit. In order to achieve a very rapid change-over of the separating valves into the closing position, the present invention arranges for an additional electric circuit that actuates the separating valve independently of the electronic control and regulating unit as the driver's deceleration demand occurs.