Abstract: The invention specifies an electrical machine (1, 1a . . . 1c) which comprises a housing (8), a stator (5) which is arranged in the housing (8) and a rotor (3) which is rotatably mounted in the housing (8). At least one first coolant duct (9) of a first cooling circuit (15) and at least one second coolant duct (10, 10a, 10b) of a second cooling circuit (16) are arranged in the region of the stator (5) in the housing (8). In this case, the coolant ducts (9, 10, 10a, 10b) and the housing (8) form a heat exchanger between the first cooling circuit (15) and the second cooling circuit (16). In addition, the invention specifies a gear motor comprising the electrical machine (1, 1a . . . 1c), in which gear motor the transmission is hydraulically connected to the at least one second coolant duct (10, 10a, 10b) of the second cooling circuit (16). The invention also specifies a vehicle (27) which is driven by the said electrical machine (1, 1a . . . 1c) or by the said gear motor.

Abstract: The invention specifies an electrical machine (1, 1a . . . 1c) which comprises a housing (8), a stator (5) which is arranged in the housing (8) and a rotor (3) which is rotatably mounted in the housing (8). At least one first coolant duct (9) of a first cooling circuit (15) and at least one second coolant duct (10, 10a, 10b) of a second cooling circuit (16) are arranged in the region of the stator (5) in the housing (8). In this case, the coolant ducts (9, 10, 10a, 10b) and the housing (8) form a heat exchanger between the first cooling circuit (15) and the second cooling circuit (16). In addition, the invention specifies a gear motor comprising the electrical machine (1, 1a . . . 1c), in which gear motor the transmission is hydraulically connected to the at least one second coolant duct (10, 10a, 10b) of the second cooling circuit (16). The invention also specifies a vehicle (27) which is driven by the said electrical machine (1, 1a . . . 1c) or by the said gear motor.

Abstract: A twin clutch system for a transmission, particularly for a twin clutch transmission, including at least two clutches each having a clutch cover to which at least one disengaging system that actuates the clutches is fastened. According to the invention, a fastening element is provided that couples both coupling covers.

Abstract: This invention relates to a method for controlling a motor vehicle drivetrain system which has a drivetrain as well as a combustion engine for driving this drivetrain and an electronic engine control unit as well as an electronic transmission control unit, whereby, if the electronic transmission control unit fails or when the electronic engine control unit loses communication with the electronic transmission control unit, the permissible engine torque of the combustion engine is limited, as well as a safety system for a motor vehicle by means of which the method is controlled, as well as a motor vehicle with such a safety system.

Abstract: A twin clutch system for a transmission, particularly for a twin clutch transmission, including at least two clutches each having a clutch cover to which at least one disengaging system that actuates the clutches is fastened. According to the invention, a fastening element is provided that couples both coupling covers.

Abstract: A gearbox actuator comprising a selector shaft 2 which is arranged in a housing and is driven by a drive. A shift finger 3 and disengaging shaped elements 4 used to actuate gearshift rails are arranged on the selector shaft, and jibs for 12-15 supporting and guiding the gearshift rails are arranged on the housing. The gearbox actuator 1 comprises the central selector shaft 2 mounted in bearing elements 19 and comprises a shift finger 3 and two disengaging shaped elements 4 arranged in the center thereof, at a distance corresponding to the width of a channel. Preferably, the selector shaft 2 is driven by a brushless motor 5 by means of a double planetary stage 6 and a toothed segment 7 which engages a toothed wheel 16 that is preferably positioned in a housing element 17. A preferably second brushless motor 8 drives a sliding element 37 by means of spindle 9, the sliding element displacing the shift finger 3 and the disengaging shaped elements 4 on the selector shaft 2.

Abstract: A method of controlling a twin-clutch transmission with a first partial transmission with which are associated a first engine clutch and a first group of gears, and a second partial transmission with which are associated a second engine clutch and a second group of gears, said method containing the step of engaging a forward gear associated with one partial transmission and a reverse gear associated with the other partial transmission when the transmission, with the motor vehicle at a standstill, is in a non-driving position.

Abstract: Methods and devices for actuating a parking brake in a gearbox which is actuated in an automated manner, whereby gear changes are carried out using at least one electrically driven actuator, gear positions can be selected by using a selector device, and the parking brake can be activated by using the selector device when the vehicle is stationary or moving slowly. A vehicle provided with an additional gearbox. An ignition key can only be removed, when the gearbox is in a P state and the additional gearbox is not in the N state. A further method and device, whereby the additional gearbox can only be shifted in the N state when the gearbox is not in the P state. Further methods and a device in which automated manual gearboxes, especially parallel gearboxes, are controlled in such a way that the vehicle can be safely parked.

Abstract: The invention relates to methods and devices for actuating a parking brake in a gearbox which is actuated in an automated manner, whereby gear changes are carried out by means of at least one electrically driven actuator, gear positions can be selected by means of a selector device, and the parking brake can be activated by means of the selector device when the vehicle is stationary or moving slowly. The invention also relates to a vehicle provided with an additional gearbox. The ignition key can only be removed, according to the inventive methods and devices, when the gearbox is in the P state and the additional gearbox is not in the N state. The invention further relates to a method and device, whereby the additional gearbox can only be shifted in the N state when the gearbox is not in the P state.

Abstract: The methods and devices for actuating a parking brake in a gearbox which is actuated in an automated manner, whereby gear changes are carried out by means of at least one electrically driven actuator, gear positions can be selected by means of a selector device, and the parking brake can be activated by means of the selector device when the vehicle is stationary or moving slowly. The invention also relates to a vehicle provided with an additional gearbox. The ignition key can only be removed, when the gearbox is in the P state and the additional gearbox is not in the N state. The further method and device, whereby the additional gearbox can only be shifted in the N state when the gearbox is not in the P state. The methods and a device for carrying out the same, by automated manual gearboxes, especially parallel gearboxes, are controlled in such a way that the vehicle can be safely parked and can set off in a reliable and comfortable manner.

Abstract: An automated transmission system includes a transmission brake which is used to apply a braking torque to the transmission, while the engine torque is negative and a transmission clutch is disengaged to effect a gear downshift, in order to avoid acceleration of the vehicle when the clutch is released and abrupt deceleration of the vehicle upon completion of the gear downshift.

Abstract: The invention relates to a drivetrain comprising an internal combustion engine, at least one friction clutch having at least one disengagement device with a pressure relief device and a transmission.

Abstract: An automated transmission system includes a transmission brake which is used to apply a braking torque to the transmission, while the engine torque is negative and a transmission clutch is disengaged to effect a gear downshift, in order to avoid acceleration of the vehicle when the clutch is released and abrupt deceleration of the vehicle upon completion of the gear downshift.

Abstract: A power transmission for a motor vehicle. The transmission includes a plurality of transmission ratio steps defined by pairs of gear carried on parallel shafts, and final output mechanisms for engaging desired transmission ratio steps. The final output mechanisms are operable for controlling the engagement of respective transmission ratio steps to minimize tractive force interruption by allowing rapid gear changes to be effected to reduce the times between shifts of gears. By sensing accelerator pedal position and vehicle speed a new transmission ratio step to be subsequently engaged can be pre-selected while an engaged gear remains engaged.

Abstract: A method of controlling a twin-clutch transmission with a first partial transmission with which are associated a first engine clutch and a first group of gears, and a second partial transmission with which are associated a second engine clutch and a second group of gears, said method containing the step of engaging a forward gear associated with one partial transmission and a reverse gear associated with the other partial transmission when the transmission, with the motor vehicle at a standstill, is in a non-driving position.

Abstract: A parallel manual transmission for a four-wheel drive is provided and includes two input shafts, each of which can be non-rotatably coupled via its own clutch to a shaft that is powered by a drive engine.

Abstract: The invention relates to a twin clutch system for a transmission, particularly for a twin clutch transmission, comprising at least two clutches each having a clutch cover (103, 104) to which at least one disengaging system (109) that actuates the clutches is fastened. According to the invention, a fastening element (110) is provided that couples both coupling covers.

Abstract: A gearbox actuator comprising a selector shaft 2 which is arranged in a housing and is driven by a drive. A shift finger 3 and disengaging shaped elements 4 used to actuate gearshift rails are arranged on the selector shaft, and jibs for 12-15 supporting and guiding the gearshift rails are arranged on the housing. The gearbox actuator 1 comprises the central selector shaft 2 mounted in bearing elements 19 and comprises a shift finger 3 and two disengaging shaped elements 4 arranged in the center thereof, at a distance corresponding to the width of a channel. Preferably, the selector shaft 2 is driven by a brushless motor 5 by means of a double planetary stage 6 and a toothed segment 7 which engages a toothed wheel 16 that is preferably positioned in a housing element 17. A preferably second brushless motor 8 drives a sliding element 37 by means of spindle 9, the sliding element displacing the shift finger 3 and the disengaging shaped elements 4 on the selector shaft 2.

Abstract: This invention relates to a method for controlling a motor vehicle drivetrain system which has a drivetrain as well as a combustion engine for driving this drivetrain and an electronic engine control unit as well as an electronic transmission control unit, whereby, if the electronic transmission control unit fails or when the electronic engine control unit loses communication with the electronic transmission control unit, the permissible engine torque of the combustion engine is limited, as well as a safety system for a motor vehicle by means of which the method is controlled, as well as a motor vehicle with such a safety system.

Abstract: The invention relates to a drivetrain comprising an internal combustion engine, at least one friction clutch having at least one disengagement device with a pressure relief device and a transmission.