Zf Friedrichshafen Ag

Michael Riedhammer

Jochen Schneider

Jürgen Legner

Wolfgang Rebholz

Hugo Burkhart

Siegfried Stützle

Oliver Bayer

Roland Fischer

Gerhard Buck

Michael Herlitzek

Kathrin Forster

Michael Thielmann

The externally fitted control device includes an electronic control module (), a hydraulic control module () and a common control enclosure (). The hydraulic control module () has electromagnetic actuators () and control pistons () which are positioned on top of one another to result in a compact design which is safe to operate and can be manufactured economically.

Externally fitted control device and hydraulic control module for an externally fitted control device

A shiftable multispeed reverse transmission having one input shaft () and a plurality of countershafts () and one output shaft (). One of gears and/or idle gears being situated upon the countershafts () for non-rotatably connection with the countershafts, via shiftable clutches, for gear and direction change. The reduction ratios being generated by spur pinion stages and at least one shiftable planetary stage (P).

Multispeed manual transmission

A piston space () of the consumer () has two delivery lines (), such that when the consumer () is not actuated, pressure medium flows continuously via the second delivery line () through the piston space () and into a pressure medium reservoir () to maintain a consumer () in readiness for actuation and operate it with uniform pressure medium viscosity. Pressure medium is passed into the piston space () through both the first pressure medium delivery line () and the second pressure medium delivery line () to actuate the consumer ().

Hydraulic system

Gear control system for a synchro-shuttle gear or power shift gear

Gear control system intended in particular for an electrically operated

Electro-hydraulic control device for power shift gearboxes

Growing community of inventors

Bermatingen, Germany

Michael Riedhammer