Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg

Getrag Transmission Corporation

Oliver Ottinger

Tobias Kalisch

Bruce J Palansky

Josef Glatthaar

Reinhard Schaarschmidt

Andreas Schaefer

Joachim Buerkle

Mathias Himmelsbach

Roland Pfister

Uwe Leibbrand

Raphael Ahne

Volker NÄGELE

A system and method for maintaining the operation of an automated transmission (), particularly a dual dutch transmission, for a motor vehicle, in case of a failure of an engine speed sensor () or a bus connection () between a first control module () controlling an engine () being connectable to the transmission () through at least one separation clutch (), and a second control module () controlling regulating units () for connecting the engine () to the transmission () or to one or more driving wheels () in a force-transmitting manner, wherein gear-shift relevant data, particularly a number of revolutions (n) of the engine, is exchanged between the control modules () over the bus connection ().

System and method for operating a dual clutch transmission during failure of an engine speed sensor or a bus connection between control modules

A method for controlling shift process in dual-clutch gearbox having dual-clutch gearbox input shaft connected to a drive engine, having two friction clutches and two partial gearboxes, comprising detecting demand for a shift from source gear into target gear, the source gear and target gear assigned to first partial gearbox; opening friction clutch assigned to first partial gearbox and closing friction clutch assigned to other partial gearbox to transmit drive power via intermediate gear of other partial gearbox; disengaging source gear and temporarily conducting a pressure-exertion process in friction clutch assigned to the first partial gearbox before engagement of target gear, with rotational speed of first partial gearbox being reduced due to the pressure-exerting operation according to drag torque, opening friction clutch assigned to other partial gearbox and closing friction clutch assigned to first partial gearbox to transfer drive power to the target gear without an interruption in tractive force.

Method for controlling an upshift process in a dual-clutch gearbox

Growing community of inventors

St. Georgen, Germany

Oliver Ottinger