Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a method for controlling a shift process in a dual-clutch gearbox having a dual-clutch gearbox input shaft connected to a drive engine, having two friction clutches and having two partial gearboxes.

Abstract: 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.

Abstract: 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.

Abstract: 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°. The associated drive motor is designed to drive said selector drum through at least 360°. 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.

Abstract: The invention relates to an actuator arrangement for a twin-clutch transmission which 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°. The associated drive motor is designed to drive said selector drum through at least 360°. 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.

Abstract: 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.

Abstract: Shift drum (10; 10?) for a multi-step transmission of a motor vehicle, with at least one circumferential track (14, 16), in particular circumferential groove (14, 16), into which at least one axially displaceable track follower (S, T) can engage, the circumferential track (14, 16) having flanks (22, 24) along which the track follower (S, T) is guided, characterized in that one of the flanks (22) has a portion (26) which is mounted so as to be movable axially out of a normal position against a restoring force (FR).

Abstract: 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.

Abstract: Shift drum (10; 10?) for a multi-step transmission of a motor vehicle, with at least one circumferential track (14, 16), in particular circumferential groove (14, 16), into which at least one axially displaceable track follower (S, T) can engage, the circumferential track (14, 16) having flanks (22, 24) along which the track follower (S, T) is guided, characterized in that one of the flanks (22) has a portion (26) which is mounted so as to be movable axially out of a normal position against a restoring force (FR).

Abstract: 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.

Abstract: 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.