Brake system for automotive vehicles with electric drive

US5421643A · kind A · utility

Assignee

• ITT Automotive Europe GmbH · DE

Inventors

• Dieter Kircher · Frankfurt am Main, DE
• Peter Rieth · Eltville am Rhein, DE
• Bill Karlheinz · Dreieich, DE
• Juergen Balz · Wiesbaden, DE
• Lothar Kunze · Hofheim, DE
• Georg Halasy-Wimmer · Leinfelden, DE

Key dates

• Filing date: Nov 24, 1993
• Grant date: Jun 6, 1995
• Expiry date: Nov 24, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S303/03
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A brake system for automotive vehicles with electric drive is operable by an actuating pedal and uses hydraulic friction brakes to augment the braking effect generated by the electric drive motors. The coaction of the drive motors with the hydraulic friction brakes is controlled by an electronic controller. In order to largely conform the pedal characteristics of the mentioned brake system to that of a standard passenger car, an actuating pedal (5) is in force-transmitting and travel-transmitting connection with a spring (8) exhibiting a predetermined characteristic curve, and the master brake cylinder (11), uncoupled from the actuating pedal (5), is operable by an electromagnet (9) which is responsive to the controller (70). If the master brake cylinder accommodates two pressure chambers, a single valve is arranged in or on the master cylinder housing, and acts as both a bypass valve and a differential-pressure valve.