Method for controlling a braking operation including determining brake coefficient forces

US5344222A · kind A · utility

Assignees

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

Inventors

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

Key dates

• Filing date: Mar 23, 1993
• Grant date: Sep 6, 1994
• Expiry date: Mar 23, 2013

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/172
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method is described for determining brake coefficients, which define the relationship between the brake pressure and the brake force at a wheel or axle of a motor vehicle or of a section of a vehicle combination during the braking operation of the vehicle or vehicle combination. During the braking operation of vehicle, the wheel speed and the brake pressure are determined measurement/time intervals with differing brake pressure distribution between the wheels, axles or vehicle sections are formed, in which the equilibrium of forces between the brake force and the force of inertia of the motor vehicle is obtained. The mass-related brake coefficients of the brake-pressure-sensed wheels or axles and a mean value for the mass-related brake coefficient of all non-brake-pressure-sensed wheels or axles are determined from the equations for the equilibrium of forces in the measurement/time intervals; by forming the quotient between these mass-related brake coefficients, the relative brake force development of the individual axle (or of the individual section of the vehicle combination), i.e. its respective proportion of the total brake force sum, can be determined without the need to kno…