Vacuum brake booster and method for the operation thereof

US8155821B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Peter Schubert · Kaarst, DE
• Patrick Merzoug · Hattersheim, DE
• Nathan Zambou · Wiesbaden, DE
• Guntjof Magel · Gerolzhofen, DE
• Ralph Gronau · Wetter, DE

Key dates

• Filing date: Jan 19, 2007
• Grant date: Apr 10, 2012
• Expiry date: Apr 27, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/68
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A vacuum brake booster and a method of operation of a vacuum brake booster of a vehicle brake system is disclosed. The vacuum brake booster includes a housing subdivided into at least one vacuum chamber and at least one working chamber. The vacuum chamber is connected to a vacuum source by way of a vacuum port. A sensor unit is associated with the vacuum chamber and is configured for sensing a pressure in the vacuum chamber and supplying a sensed pressure value to an electronic control unit (ECU). The ECU includes an evaluating unit for evaluating the sensed pressure value and calculating the operating point of the vacuum brake booster solely on the basis of the sensed pressure in the vacuum chamber. Plausibilization of the sensed pressure value is performed to monitor the overall system and identify defects of the sensor unit or the vacuum brake booster.