Method for creating low pressure in a brake activation device of a motor vehicle brake system

US8231182B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Jürgen Schonlau · Eltville am Rhein, DE
• Manfred Rüffer · Pocking, DE
• Horst Krämer · Ginsheim-Gustavsburg, DE
• Michael Jürging · Kelkheim, DE

Key dates

• Filing date: May 10, 2007
• Grant date: Jul 31, 2012
• Expiry date: Jan 9, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T17/02
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for creating low pressure in a brake activation device of a motor vehicle brake system, comprising a pneumatic brake force booster the interior of which is divided into at least one low-pressure chamber and one working chamber, a brake master cylinder and a pneumatic motor pump unit for creating the low pressure in the low-pressure chamber, which motor pump unit comprises a low-pressure pump and a motor driving the low-pressure pump, a low-pressure level in the low-pressure chamber or a pressure difference between the low-pressure chamber and the working chamber being detected by a sensor and the motor pump unit being activated by an electronic control unit if the pressure falls below a first predefined, lower low-pressure level Pe in the low-pressure chamber and being deactivated if a second predetermined, upper low-pressure level Pa is reached.