Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg

Magna Pt B.v. & Co. Kg

Getrag B.v. & Co. Kg

Reinhard Schaarschmidt

Martin Seufert

Hansi Gremplini

Stefan Kapp

Georg Burgardt

Tobias Kalisch

Oliver Ottinger

Stephan Bungart

Andreas Schaefer

Thomas Wolf

Gunter Knoedel

Hannes Kiessling

Oliver Eppler

Raphael Ahne

Uwe Leibbrand

Roland Pfister

Mathias Himmelsbach

Joachim Buerkle

Gerhard Bellinger

Cedric Nuffer

Jens Neuendorf

Inan Cokdogru

Timo Stark

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

A step variable transmission for a motor vehicle has a plurality of forward gear stages and at least one reverse gear stage. The transmission comprising: a drive input shaft arrangement, a drive output shaft arrangement, and a plurality of wheel sets which have loose wheels and shift wheels, wherein the shift wheels are rotatably mounted on a shaft arrangement and can be rotationally fixedly connected to the associated shaft arrangement by means of respective shift clutches.

Step variable transmission for a motor vehicle

An actuator arrangement for a twin-clutch transmission has a first and a second partial transmission. The first partial transmission contains odd forward gear stages and the second partial transmission contains even forward gear stages. At least one first and one second selector drum have in each case one controllable drive motor and at least one control cam. Each control cam is assigned at least one cam follower. The control cam of at least one selector drum encircles through at least 360&#xb0;. The associated drive motor is designed to drive said selector drum through at least 360&#xb0;. The gear stages are distributed on the two selector drums, and arranged on the control cams, in such a way that at least one direct multiple shift can be carried out.

Actuator arrangement having selector drums for a twin-clutch transmission

A drive train is proposed for a motor vehicle which is driven by an internal combustion engine, having a single friction clutch which has an input element and an output element, wherein the input element is to be connected to a crankshaft of the internal combustion engine; a step-by-step variable speed transmission which has an input shaft connected to the output element of the friction clutch; and an electric machine which can be connected via a clutch to an output shaft of the step-by-step variable speed transmission in order to be able to apply traction force to the output shaft when the friction clutch is opened or closed, and which can be connected as a starter generator to the crankshaft in order to start the internal combustion engine or be driven by the internal combustion engine. The electric machine can be connected fixed in terms of rotation to the crankshaft while bypassing the friction clutch in order, in this way, to start the internal combustion engine when the friction clutch is opened or to be driven by the internal combustion engine.

Drive train for a motor vehicle and method for starting an internal combustion engine and method for generating electric current

Shift drum (') for a multi-step transmission of a motor vehicle, with at least one circumferential track (), in particular circumferential groove (), into which at least one axially displaceable track follower (S, T) can engage, the circumferential track () having flanks () along which the track follower (S, T) is guided, characterized in that one of the flanks () has a portion () which is mounted so as to be movable axially out of a normal position against a restoring force (F).

Shift drum having an insertion-groove flank movable axially with respect to a shift drum axis and shifting method

A gearshift sleeve actuating apparatus for a stepped automotive gearbox is disclosed. The apparatus comprises a shift rod which can be displaced along its axis. A shift fork and an engaging piece or driver are rigidly arranged on the shift rod. The apparatus is configured as a composite plastic/metal structure in which a metal component, constituting the engaging piece as well as a core for the shift rod, is injection-embedded in a plastic material. The shift fork consists exclusively of the plastic material.

Actuation apparatus for a gearshift sleeve in a stepped automotive

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Illingen, Germany

Reinhard Schaarschmidt