Voith Turbo Gmbh Co. Kg

Voith Patent Gmbh

Roland Scherer

Peter Heilinger

Peter Rose

Klaus Vogelsang

Tilman Huth

Gunter Schoof

Mirco Wassermann

Markus Bischoff

J&uuml;rgen Betz

Jürgen Betz

Andreas-Nicolas Mayer

A drive train having a hydrodynamic machine and a cooling medium circuit with a liquid or gaseous cooling medium. The hydrodynamic machine has at least one primary impeller, a secondary impeller, at least one control valve, and a control unit. The control unit actuates the at least one control valve in order to control the flow of the working medium into or out of the hydrodynamic machine. The secondary impeller and the at least one primary impeller form a working chamber that can be filled with a working medium. The cooling medium circuit is configured to cool the working medium and the control unit.

Drive train

A method for filing a retarder with an operating fluid through a valve connected to a fluid reservoir having air pressure P and conveying an operating fluid with an actuating pressure P in the retarder. The method comprises: after starting the retarder during a first time interval T , an overshoot actuating pressure P (U) lying above nominal pressure P NENN for the nominal braking torque to be regulated is adjusted. In a second time interval T , overshoot actuating pressure P (U) is reduced to a nominal pressure P NENN. The overshoot actuating pressure P (U) and timer intervals T and T are determined or regulated depending on at least one of the following parameters: reservoir air pressure P , retarder oil temperature, retarder or vehicle speed, vehicle acceleration, vehicle transversal acceleration, ABS signal, axle load, brake-pause interval, operating fluid level, outside temperature, speed of the actuating element, acceleration with respect to nominal value settings (speed variation without nominal value dynamics).

Method for retarder control and control apparatus for the same

A regulating device is for a primary braking system in the drive train of a vehicle, especially a primary retarder in a vehicle. The device includes at least one control/regulator unit, a device for detecting gear shifts transmitting at least one measuring signal, and at least one actuator enabling the braking moment of the primary braking system to be adjusted. The regulating device is characterized in that the at least one control/regulator unit controls the at least one actuator in order to adjust the braking moment of the primary braking system according to the measuring signal or measuring signals in such a way that the braking moment of the primary brake is reduced for the entire duration of a gear shift.

Retarder braking moment adaptation during clutching and gear changing

System for adapting the braking moment of a primary system as a function

A control system for influencing the speed of a motor vehicle. The invention is characterized in that the retarder controller and the pertaining servomechanism already available in a vehicle with an installed retarder is in traction operation additionally utilized for throttling the drive engine down when a presettable allowed maximum value of the speed is exceeded.

Control system for influencing the speed of a motor vehicle

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Crailsheim, Germany

Roland Scherer