Abstract: Method is disclosed for operating a drive train having an electric machine and an internal-combustion engine with a supercharger having at least one additional electric machine for the optional drive of a power transmission. An optimal operating point of the at least one additional electric machine is selected as a function of the definable operating point of the internal-combustion engine such that the electric energy flowing during the operation of the at least one additional electric machine at the optimal operating point flows between electric machines without any detouring.

Abstract: A method is employed for starting an internal combustion engine in a hybrid vehicle drive which is driven by an electric motor. A speed of the internal combustion engine is adjusted to a target speed. The internal combustion engine speed exceeds the target speed over a predefined time by a predetermined speed differential.

Abstract: A gearbox arrangement for a drive train of a motor vehicle, such as a double clutch gearbox arrangement or a power shift gearbox arrangement, has at least one group of gear-shifting elements (1, 2) which can be actuated for engaging and disengaging at least one respective gear of the gearbox arrangement in that they are moved relative to a gearbox housing between at least one neutral position, in which no gear associated with the gear-shifting element is engaged, and at least one engaged-gear position, in which a gear associated with the gear-shifting element and the engaged-gear position is engaged.

Abstract: The invention relates to a method for operating a drive train (1) comprising an internal combustion engine (2), an electric motor (10) and an automatic transmission (11), in which, during an operating state with the electric motor (10) switched on and the internal combustion engine (2) switched off, the internal combustion engine (2) is engaged by a transmission of torque to the internal combustion engine (2), used to accelerate the internal combustion engine (2), being coupled in time with a downshift operation in the automatic transmission (11).

Abstract: A system and method for controlling a hybrid vehicle drive has a device for detecting a charging power of a heavy-duty battery for an electric motor, a device for determining at least one fuel consumption parameter for several different transmission gear positions at the detected charging power and for determining an optimized gear position in which the determined fuel consumption parameter indicates an optimized fuel consumption. The determining device controls the gear position of the transmission to the determined optimized gear position by via a transmission control device.

Abstract: A drive train for a motor vehicle includes a coupling device between a drive unit and a transmission for torque or moment transfer between the drive unit and the transmission. The coupling device has at least one coupling arrangement that can be activated by a pressure medium. The transmission can be activated through the use of a pressure medium by way of a dedicated actuator whereby, on the basis of a shared pump arrangement that is or can be driven by the drive unit, (i) the pressure medium can be provided for activation of the coupling arrangement, (ii) the operating medium can be conducted to the coupling device for the purpose of operating under the influence of the operating medium, and (iii) the pressure medium can be provided for activation of the transmission. The pump arrangement includes at least one pump, which can be controlled or adjusted with regard to output pressure and/or with regard to output flow rate.

Abstract: A drivetrain of a motor vehicle has an internal combustion engine, an electric motor, a transmission, and a torque converter with a converter bypass clutch. The drivetrain is controlled such that, during an electric operating mode in which the internal combustion engine is deactivated and the electric motor is activated, and/or during a recuperation operating mode in which the internal combustion engine is deactivated and the electric motor is operated as a generator, the converter bypass clutch is permanently closed, at least between shift processes of the transmission, in order to bypass the torque converter.

Abstract: A method operates a drive train the is formed of an internal combustion engine, an electric motor, a transmission and a first clutch that connects the internal combustion engine to the electric motor. During an operating state for applying a current requested torque to a transmission input with the electric motor switched on and the internal combustion engine switched off, the internal combustion engine is connected into the circuit by increasing the torque applied to the drive train by the electric motor before the internal combustion engine starts, in such a way that only the current requested torque is applied to the transmission input. Excess torque is extracted from the drive train by actuating the first clutch and applying the excess torque to the internal combustion engine in order to accelerate it. The internal combustion engine is started when its starting state is reached.

Abstract: A method and a device for controlling a hybrid vehicle drive. The device contains a multiplicity of control parameter sets with different set point charge states for a high performance battery of the electric motor. The set point charge states are assigned to a respective operating mode of the vehicle. A definition device for defining a current operating mode of the vehicle, as a result of which a control parameter set which corresponds to the defined current operating mode of the vehicle can be used to control a charge mode of the high performance battery of the electric motor with a corresponding set point charge state.

Abstract: A method and a device control a hybrid vehicle drive. The device contains a multiplicity of control parameter sets having different recovery torques for a conversion control device which sets a recovery torque of the electric motor in an overrun phase, which recovery torques are assigned a respective driving mode indicator. A definition device is provided for defining a current driving mode indicator, as a result of which a control parameter set corresponding to the defined current driving mode indicator can be used to control the conversion control device in an overrun phase of the hybrid vehicle drive.

Abstract: A method implements a starting process for an internal combustion engine which has a drive unit and a transmission with at least two transmission input shafts and a multiple clutch device, in particular a double clutch device. During the starting process, the first gear is engaged in a first clutch of the multiple clutch device and is activated, while the second gear speed is engaged in a second clutch of the multiple clutch device but not activated. During the starting process, a current velocity is compared with a predefinable reference velocity, and when the reference velocity is reached a control unit causes the first clutch to be opened and thus causes the first gear to be deactivated while, in parallel with this, the second clutch is closed and the second gear is thus activated.

Abstract: An adjusting device serves to change the position of a gearshift lever of a motor vehicle, in which the gearshift lever is disposed adjacent to a steering wheel in a passenger compartment of the motor vehicle. In order to optimize the adjusting device, it is has a drive device disposed between gearshift lever and steering wheel.

Abstract: A gearshift mechanism for a motor vehicle with hydraulically actuated multiple clutch, particularly a twin clutch, has a first gear input shaft to drive a first group of gears and a second gear input shaft to drive a second group of gears. The two gear input shafts are each assigned a clutch unit being coaxial to one another. A stationary housing accommodates the two clutch units. At its end face, the housing can be closed off by a housing cover that has a central opening through which a drive hub of a clutch cage is guided. The housing cover is provided with a bearing flange around the central opening, on the outside of which the clutch cage is supported. This advantageously supports the clutch on the housing and makes it possible to achieve a support effect for a dual mass flywheel or the crankshaft end of the internal combustion engine.

Abstract: A drive unit for a motor vehicle, having an engine unit and an axle differential arranged on the engine unit, as well as having drive shafts for the vehicle wheels disposed at least partially in the crankcase. The separating plane between the crankcase bottom part and the oil bearing housing of the crankcase acts as the bearing for at least one drive shaft.

Abstract: A hydraulic clutch mechanism for a motor vehicle includes a master cylinder assigned to a clutch pedal and a take-up cylinder assigned to a clutch. The master cylinder and the take-up cylinder are integrated in a hydraulic line running between the clutch pedal and the clutch, as is a mechanism which controls and/or delimits the fluid volume in the hydraulic fluid system. The use of a control valve in the hydraulic line to provide starting assistance and control the engagement of the clutch is suggested.

Abstract: A gearshift mechanism for a motor vehicle with hydraulically actuated multiple clutch, particularly a twin clutch, has a first gear input shaft to drive a first group of gears and a second gear input shaft to drive a second group of gears. The two gear input shafts are each assigned a clutch unit being coaxial to one another. A stationary housing accommodates the two clutch units. At its end face, the housing can be closed off by a housing cover that has a central opening through which a drive hub of a clutch cage is guided. The housing cover is provided with a bearing flange around the central opening, on the outside of which the clutch cage is supported. This advantageously supports the clutch on the housing and makes it possible to achieve a support effect for a dual mass flywheel or the crankshaft end of the internal combustion engine.

Abstract: The invention concerns a drive train for a motor vehicle, which includes a coupling device (202) between a drive unit (232) and a transmission for moment transfer between the drive unit and the transmission, whereby the coupling device shows at least one coupling arrangement (204, 206) that can be activated by means of a pressure medium, for operation under the influence of an operating medium, and the transmission can be activated through the use of a pressure medium by means of a dedicated actuator (234), whereby, on the basis of a shared pump arrangement (209) that is or can be driven by the drive unit, i) the pressure medium can be provided for activation of the coupling arrangement, and ii) the operating medium can be conducted to the coupling device for the purpose of operating under the influence of the operating medium, and iii) the pressure medium can be provided for activation of the transmission, and whereby the pump arrangement includes at least one pump (209), which can be controlled or adjusted

Abstract: A display device for displaying transmission selected speeds and ratios is provided. In order to create a display device in which the space requirement for the display is reduced, it is proposed to use as the display elements the scale elements such as scale numbers or divisional lines of a display instrument. In preferred embodiments, the display instrument is a tachometer.

Abstract: An internal-combustion engine valve gear has at least two adjacent stroke transmitting elements which, by way of a hydraulically displaceable coupling element, in a coupled position can be displaced with respect to one another and, in the uncoupled position, can be displaced independently of one another. The stroke transmitting elements interact with the cam of a camshaft having different cam paths which interact with different stroke courses with the stroke transmitting elements. In order to avoid undefined switching conditions in the operation of the internal-combustion engine and, during each switching operation have sufficient time for the displacement of the coupling element, this coupling element interacts with a locking element which locks and unlocks the coupling element as a function of the cam path.