Mercedes-benz Aktiengesellschaft

Bodo Klein

Michael Reiner

Bernhard Topfer

Wolfgang Muller

Bernhard Toepfer

A method of wear-dependent braking force distribution prevents adhesion problems without being limited to lowest brake pressures as is the case with conventional methods. Wear control is dispensed with only in the case of operationally very rare braking actions, for example, those above 0.3 g or a learned adhesion threshold. These rare braking actions are limited, in practice, to genuinely critical braking situations. Otherwise, the control interventions are carried out with to produce balanced wear only in the long term; an attempt is made to achieve wear at the same rate rather than simply balanced wear.

Method of determining a wear-dependent braking force distribution

A method is provided to determine an optimized value of the brake pressure ratio between a tractor and a trailer or semitrailer. In particular, an increased value of the brake pressure of the trailer or semitrailer in relation to the brake pressure resulting from the position of the brake pedal is supplied for a particular duration at the beginning of a braking operation. The increase of the brake pressure of the trailer or semitrailer takes place as a function of the brake pressure, p.sub.Anh, resulting from the position of the brake pedal. In braking operations when a tractor is travelling without a trailer or semitrailer, an allocation of the achieved deceleration, z.sub.ist, to the brake pressure p.sub.Zug of the tractor is stored as a function of the load state of the tractor. When the tractor is travelling with a trailer or semitrailer, a brake pressure is supplied for the trailer or semitrailer and is allocated to the brake pressure of the tractor such that, in subsequent braking operations, the actual value of the deceleration which is then set at a prevailing brake pressure of the tractor, giving due regard to the load state of the tractor, corresponds to the value, derived from the stored allocation, of the deceleration achieved without a trailer or semitrailer at the same brake pressure of the tractor.

Growing community of inventors

Munich, Georgia

Bodo Klein