Brake pressure control method for a motor vehicle power brake system

US6460943B1 · kind B1 · utility

Assignees

• Daimlerchrysler AG · US
• Temic Telefunken Microelectronik · DE

Inventors

• Bernhard Toepfer · Stuttgart, DE
• Wolfgang Mueller · Lustenau, AT
• Michael Reiner · Fellbach, DE
• Reinhard Helldoerfer · Schwabach, DE

Key dates

• Filing date: Sep 27, 1994
• Grant date: Oct 8, 2002
• Expiry date: Sep 27, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/662
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method controls brake pressure for a motor vehicle pressure medium-actuated power brake system in which the adjustment of a proportionality factor (k) between deceleration and brake pressure starting from an initial value (ko) is limited to a range bounded by a lower limit value and an upper limit value in which range the initial value (ko) is contained. This produces a warning travel of the pedal when excessive deviation of the brake pressure from the expected value occurs. The warning travel informs the driver of the braking effect which is deviating excessively from the expected degree. Methods are known in which a specific travel (sp) of the brake pedal is interpreted as a setting of a specific desired deceleration (zs) of the vehicle and the required brake pressure is set automatically if appropriate by incrementally adjusting a variable proportionality factor (k).