Abstract: A motor vehicle transmission actuator for operation of a motor vehicle transmission, including gearsets which form different ratios, whereby the transmission actuator has a threaded shaft with at least one first threaded section, embodied as a right-handed thread and at least one second threaded section, embodied as a left-hand thread with just one electric motor for driving in the selection direction and the switching direction.

Abstract: A system for ensuring the ability to start an internal combustion engine contained within a drive train of a vehicle includes, in addition to an actuation device, a torque transmission device contained in the drive train between the internal combustion engine and driven vehicle wheels, an enabling device that is operable by a person operating the vehicle and by means of which the operability of the starter is enabled for starting the internal combustion engine when the torque transmission between the internal combustion engine and the driven wheels of the vehicle is interrupted.

Abstract: The invention relates to a transmission device for a motor vehicle that has a plurality of gear sets that form gear ratio steps, final control mechanisms being provided and an actuation device being provided for the actuation of the final control mechanisms that has a plurality of drivable main control elements, especially shift fingers, to act on final control mechanisms for the engagement of gear ratio steps, it being possible to act on at least one final control mechanism via either a first or a second main control element, these two main control elements of the final control mechanism being moved as a function of the main control element that acts on this final control mechanism in one of two different directions, especially opposite directions, when in this context there is identical drive direction, especially identical rotational direction; and an actuation device and a method for the electronically controlled determination of reference positions of an actuation device.

Abstract: The invention relates to a parallel shift transmission having a drive unit and two partial transmissions, each connectable to the drive unit via a friction clutch and each having a plurality of gear ratio steps.

Abstract: In a clutch which is impelled by an actuator into the closed position and which automatically moves into the open position by an opening spring, the movement of the clutch into the open position is monitored and any malfunction is displayed.

Abstract: A method for operating a drive mechanism comprising bringing a mobile element into a predetermined reference position with the help of an engine and setting an absolute position signal to a reference value allocated to a reference position; changing the position of the mobile element with the help of the engine and creating an incremental position measurement signal, depending on the change in position, for the mobile element; controlling the incremental position measurement signal and following the absolute position signal when a change in the incremental position measurement signal occurs; repositioning the mobile element in the reference position with assistance of the engine and determining the position value indicated by the absolute position signal in the reference position; determining a difference value from the position value and the reference value and saving the difference value in a data storage; and, repeating steps b) through e) are performed at least once.

Abstract: The invention relates to a transmission device for motor vehicles, wherein the transmission device has several wheel sets for forming gears and wherein the transmission device has an internal gear shift and a gear actuator for actuating the internal gear shift for engaging and disengaging gears, and wherein the transmission device has a transmission housing in which the wheel sets provided for forming gears are held, wherein the gear actuator has two separate function modules, of which a first one is a drive module and of which a second is an actuating module, wherein the drive module has at least one, especially electronically-controlled, drive device like an electric motor and wherein during engaging and disengaging gears, the actuating module is in the power flow between the drive module and the internal gear shift and wherein the actuating module and the drive module are mounted separately on the transmission housing.

Abstract: A system for ensuring the ability to start an internal combustion engine contained within a drive train of a vehicle includes, in addition to an actuation device, a torque transmission device contained in the drive train between the internal combustion engine and driven vehicle wheels, an enabling device that is operable by a person operating the vehicle and by means of which the operability of the starter is enabled for starting the internal combustion engine when the torque transmission between the internal combustion engine and the driven wheels of the vehicle is interrupted.

Abstract: A process and device for controlling a motor vehicle with an initialization device (43) for startup and a clutch actuated by means of a clutch actuator set (45) between a drive unit and a gear with a control device (41) by means of which at least one control of the clutch actuator set (45) and an acquisition of measurement data of a sensor (47) takes place for the purpose of determining the position of the clutch, characterized in that to verify the state “clutch open” upon startup, a positioning of the clutch actuator set (45) that has been set and stored before or during shutdown is compared to a positioning that was acquired during a predetermined movement course of the clutch actuator set (45) after startup by means of a distance measurement, which takes place at least in a segment of that movement course, whereby the state “clutch open” is recognized, in particular, when the magnitude of the comparison is within a predetermined tolerance range.

Abstract: To improve the safety of automated gearboxes, it is proposed that terminal positions of internal gearshift members and external actuation members be so defined separately from each other that one can recognize whether the engagement of a speed is accompanied by the attainment of a terminal position of an internal gearshift member or an external actuation member. Error analysis is possible in this way. For dual clutch gears, it is additionally proposed that one can, at least in gearshift operations that are critical in terms of safety, disengage on speed of a subgear in a separate procedure, before a new speed of this subgear can be engaged.

Abstract: The invention relates to a parallel shift transmission having a drive unit and two partial transmissions, each connectable to the drive unit via a friction clutch and each having a plurality of gear ratio steps.

Abstract: The invention relates to a transmission device for a motor vehicle comprising a plurality of connecting elements that are mounted in an axially movable manner and are each provided with a shift mouthpiece and comprising an actuating device having a control shaft that is mounted in a swiveling and axially movable manner, on which is provided a main control element and at least one secondary control element, the at least one secondary control element having functional regions for a movement in the same direction as well as functional regions for movement in the opposite direction, the at least one secondary control element extending in its neutral position essentially perpendicular to the direction of movement of the connecting elements, and, with respect to this neutral position on the secondary control element and on at least one shift mouthpiece, the particular functional regions for the movement in the same direction being designed with a bent shape and being axially symmetric to the particular, likewise be

Abstract: The invention relates to a transmission device for a motor vehicle that has a plurality of gear sets that form gear ratio steps, final control mechanisms being provided and an actuation device being provided for the actuation of the final control mechanisms that has a plurality of drivable main control elements, especially shift fingers, to act on final control mechanisms for the engagement of gear ratio steps, it being possible to act on at least one final control mechanism via either a first or a second main control element, these two main control elements of the final control mechanism being moved as a function of the main control element that acts on this final control mechanism in one of two different directions, especially opposite directions, when in this context there is identical drive direction, especially identical rotational direction; and an actuation device and a method for the electronically controlled determination of reference positions of an actuation device.

Abstract: The invention relates to an actuator device for a motor vehicle transmission, the motor vehicle transmission having:—at least two shafts;—a plurality of gear sets for the achievement of different gear steps;—a plurality of shift mechanisms that may be operated to produce or release a rotationally fixed shaft-gear connection; the actuator device having:—a plurality of output elements that can be moved in order to operatively engage in shift mechanisms of the transmission—a main actuator device having at least one main actuator element that is movable for the engagement of gears, the main actuator element preferably being an output element—a secondary actuator device having at least one movably mounted secondary actuator element, which is movable for the disengagement of gears, the at least one secondary actuator element preferably being an output element, the main actuator device and the secondary actuator device cooperating to produce controlled relative movements of at least two output elements.

Abstract: A continuously variable transmission for use in the power train of a motor vehicle has parallel input and output shafts, an adjustable pulley on each shaft, an endless torque transmitting chain or belt trained over the pulleys, and a torque sensor which transmits variable torque from the engine of the motor vehicle to the pulley on the input shaft. The torque sensor also serves to initiate and regulate the adjustments of the pulleys.

Abstract: In a transmission having shaft-mounted components operated by a pressurized medium or fluid, the fluid is supplied to the components using an at least partially hollow shaft. A hollow tube within the bore of the shaft carries the fluid. The tube may be divided into separate passageways so as to control flow of fluid to selected components and isolate components from each other. The fluid pressure in the components may be torque-dependently modulated by a torque sensor.