Brake power booster and a method for controlling the same

US6516701B1 · kind B1 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Peter Drott · Frankfurt am Main, DE
• Michael Vogt · Frankfurt am Main, DE
• Hans-Jörg Feigel · Rosbach, DE
• Jose Gonzales · Idstein, DE
• Horst Krämer · Ginsheim-Gustavsburg, DE
• Thorsten Neu · Runkel, DE

Key dates

• Filing date: Oct 27, 2000
• Grant date: Feb 11, 2003
• Expiry date: Oct 27, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/72
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a brake force booster for automotive vehicles which includes a booster housing whose interior space is subdivided by a movable wall into a working chamber and a vacuum chamber, and a control housing which carries the movable wall and in which a control valve is arranged for controlling a pressure differential that acts upon the movable wall, the said control valve being operable by an operating rod by way of a valve piston and by an electromagnet. According to the present invention, the brake force booster is characterized in that the electromagnet is actuatable in dependence on the relative displacement between the valve piston and the control housing detected by a sensor. This arrangement makes possible a very simple control of a brake assist function because the signal of the sensor can be used both for the activation and the deactivation of the electromagnet. This means that the brake assist function can be triggered and/or terminated only on the basis of the signals of one single sensor.