Process and apparatus for determining the application pressures and characteristic brake values of a vehicle

US5669678A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Werner Stumpe · Kornwestheim, DE
• Bernhard Schwendemann · Schorndorf, DE
• Matthias Horn · Tettnang, DE

Key dates

• Filing date: Apr 1, 1996
• Grant date: Sep 23, 1997
• Expiry date: Apr 1, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/686
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

During one or more braking processes, the application pressures of the wheel brakes and the characteristic brake values of the wheel brakes of at least one axle are determined. The application pressure represents the beginning of brake action at the wheels and can be determined from an inflection point in the curve representing brake pressure at the wheels as it increases in response to a driver's command, and further from the wheel velocity or a derivative thereof. The characteristic brake values are determined based on the brake pressure, the application pressure, and the deceleration of the vehicle. The application pressures and the characteristic brake values are stored for use in subsequent brake actions, in order to control the brakes so that wheels at each axle are uniformly braked.