Mercedes-benz Aktiengesellschaft

Daimler Chrysler Ag

Frank Tietze

Gerhard Wagner

Gunter Jurgens

Gerhard Fischle

Thomas Kull

Peter Woll

Ludger Kortenjann

Taner Kandemir

Thorsten Klepser

Rainer Wust

Alexander Hohnwald

In a method for determining the temperature of a wheel-braking device of a brake system, the current disc temperature of the brake disc is determined based on the last-determined disc temperature, the energy supplied to the brake disc since the last temperature determination, and the energy discharged by the brake disc since the last temperature determination. The current caliper temperature of the brake caliper of the wheel-braking device is determined by means of the current disc temperature of the brake disc.

Method for determining the temperature of a wheel-braking device of a brake system

A system for a motor vehicle has a motor vehicle gearbox by means of which a reversal of the direction of travel can be initiated, a vehicle brake unit which is separate from the motor vehicle gearbox, and a control unit. When there is a reversal of the direction of travel from at least one first direction into a second direction when there is still a positive vehicle velocity in the first direction, the control unit generates a braking torque which reduces the vehicle velocity, by means of an actuation unit and by means of the vehicle brake unit. The actual direction of travel of the motor vehicle is determined here by means of a sensor unit.

System having a motor vehicle gearbox and method of using same

In an automatic discrete step gearbox of a motor vehicle, the working pressure of a frictional connection (clutch or brake) to be engaged is set at the beginning of a gear-change by an electronic control unit in accordance with a specified required value variation and additionally as a function of correction values. The correction values are determined as a function of deviations between the required transmission torque value and the actual transmission torque value of the frictional connection.

Arrangement for controlling a frictional connection in a gear-changing

A method for the control of a gear change of an automatic discrete step gearbox of a motor vehicle superimposes a regulation of the gearbox input rotational speed during a rotational speed adaptation phase on a control of the transmission torque of a frictional connection. A required deceleration value is specified as a function of a deceleration torque to be brought about by the frictional connection.

Automatic gear change control method for a motor vehicle automatic

A pressure supply to an automatic selector device of a change-speed gearbox, controls working pressure via a multi-path valve device. The working pressure is supplied either only to clutch actuators of two drive clutches located in the force path before the change-speed gearbox or to selector actuators for the actuation of selector clutches producing the force path within the change-speed gearbox. The clutch actuator of one drive clutch is subjected to a load-dependent main pressure in the latter case.

Configuration for the pressure supply to an automatic selector device of

An axial piston-type servomotor uses control connections on the working cylinder and corresponding control edges on the working piston, together with selector valve apparatus for controlling the working piston into a central stroke position.

Axial piston type pressure medium servomotor control device

A method for the automatic shifting of a multi-path toothed-wheel gear change box between two gears which are formed in a first gearbox subunit temporarily engages a middle gear formed in a second, parallel gearbox subunit. It is simultaneously ensured, by control of the working pressures for actuating the power-shift clutches connecting the gearbox subunits to the input shaft, that the speed characteristic of the input shaft shifting is essentially steady without remaining at the middle gear speed value.

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Stuttgart, Germany

Frank Tietze