Zf Friedrichshafen Ag

Zahnradfabrik Friedrichshafen, Ag.

Bernhard Grupp

Ludger Ronge

Gerhard Buri

Friedrich Schreiner

Frank Sauter

Peter Schmidtner

Bernhard Reisch

Otto Ebner

Heinz Wanninger

A motor vehicle gearbox having a hydrodynamic retarder () and at least one connection () for a power take-off drive. The retarder () can be driven by an output shaft () of the gearbox () via a spur gear stage () having a drive gear () and an output gear (). The drive gear () engages with at least one further output gear () by which at least one further power take-off drive () can be driven.

Motor vehicle gearbox with a hydrodynamic retarder

A stepped braking system is used as a function of the required braking torque in this method for maintaining a desired braking torque in a vehicle equipped with stepped and infinitely-variable permanent braking systems whereby simultaneous activation of the stepped and infinitely-variable braking systems occurs in such manner that the sum of the participations of the different systems provides the required braking torque at any time.

Method for maintaining a desired braking torque

Gear shift device

Growing community of inventors

Weingarten, Germany

Bernhard Grupp