Method for determination of wheel speed

US5375452A · kind A · utility

Assignees

• Temic Telefunken Microelectronik · DE
• Mercedes-Benz Group AG · DE

Inventors

• Reinhard Helldorfer · Schwabach, DE
• Gerhard Hettich · Roßtal, DE
• Matthias Gramann · Neunkirchen, DE
• Jurgen Leuteritz · Nuremberg, DE
• Bernhard Topfer · Stuttgart, DE

Key dates

• Filing date: Jan 25, 1993
• Grant date: Dec 27, 1994
• Expiry date: Jan 25, 2013

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/172
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method is described for determining the wheel speed during braking of a vehicle having in addition to at least one wheel with speed sensor at least one further wheel without speed sensor and means for determining the braking pressure. For this purpose, the braking operation is subdivided into several time intervals during which the relative value from the braking energy and the kinetic energy of the vehicle are obtained, and the contribution of the wheels without speed sensors to the braking energy is defined during a first time interval. Furthermore, the ratio of the relative value in this time interval to the relative values in further time intervals is formed, and the mean value for the wheel speed of all wheels without speed sensors is ascertained in the further time intervals from the ratio of the relative values.