Abstract: A gearbox for a motor vehicle. The gearbox comprises at least one fluid supply system. The fluid supply system comprises at least one pump. The fluid supply system comprises at least one fluid sump. The fluid supply system comprises at least one fluid reservoir. The fluid reservoir comprises at least a first fluid outflow leading into the fluid sump. The first fluid outflow can be controlled as a function of a state variable.

Abstract: A gearbox for a motor vehicle. The gearbox comprises at least one fluid supply system. The fluid supply system comprises at least one pump. The fluid supply system comprises at least one fluid sump. The fluid supply system comprises at least one fluid reservoir. The fluid reservoir comprises at least a first fluid outflow leading into the fluid sump. The first fluid outflow can be controlled as a function of a state variable.

Abstract: A dual clutch transmission comprising a first partial transmission and a second partial transmission is provided. A first group of forward gears is allocated to the first partial transmission, a second group of forward gears is allocated to the second partial transmission, each one of the forward gears comprises a particular transmission ratio, two adjacent forward gears comprise adjacent transmission ratios with no transmission ratio of any other forward gear in between, and at least two adjacent forward gears are allocated to the second partial transmission. Further, such a control method for controlling the dual clutch transmission is provided that a torque transmitting gap is closed when gear shifting between the aforementioned two adjacent gears.

Abstract: An automated gear shift transmission and method of controlling the same are described. The transmission is installed in a motor vehicle comprising several forward gears and at least one reverse gear and that allows choosing from several different driving modes by means of a driving mode selector lever. A forward gear is maintained in engagement in case of an uphill orientation of the motor vehicle when the parking mode is chosen. Instead of the forward gear, a reverse gear is maintained in engagement in case of a downhill orientation of the motor vehicle when the parking mode is chosen. This allows taking specific driving conditions or driving situations into account with relatively simple means.

Abstract: A dual clutch transmission comprising a first partial transmission and a second partial transmission is described. A first group of forward gears is allocated to the first partial transmission, a second group of forward gears is allocated to the second partial transmission, each one of the forward gears comprises a particular transmission ratio, two adjacent forward gears comprise adjacent transmission ratios with no transmission ratio of any other forward gear in between, and at least two adjacent forward gears are allocated to the second partial transmission. The invention comprises further a control method for controlling the dual clutch transmission such that a torque transmitting gap is closed when gear shifting between the aforementioned two adjacent gears.

Abstract: An automated gear shift transmission and method of controlling the same are described. The transmission is installed in a motor vehicle comprising several forward gears and at least one reverse gear and that allows choosing from several different driving modes by means of a driving mode selector lever. A forward gear is maintained in engagement in case of an uphill orientation of the motor vehicle when the parking mode is chosen. Instead of the forward gear, a reverse gear is maintained in engagement in case of a downhill orientation of the motor vehicle when the parking mode is chosen. This allows taking specific driving conditions or driving situations into account with relatively simple means.

Abstract: A twin-clutch transmission, in particular for a motor vehicle, with a twin-clutch arrangement comprising a first and a second clutch, and a first and a second drive unit designed as an electric machine with a stator and a rotor. The rotor of the first drive unit is fixed to an input side of the transmission that is connected to an engine so that it rotates always at the rotational speed of the engine. The twin-clutch transmission can be switched back and forth between a serial and a parallel hybrid mode, these modes being established by means of the first and second drive units. The drive shaft of the second drive unit and the clutches have different rotational axes.

Abstract: A hydraulic control apparatus and method of controlling it for an automatic dual clutch transmission, which includes a first clutch with a first partial transmission and a second clutch with a second partial transmission, as well as a shifting system for engaging/releasing gears of the two partial transmissions. A first switching valve in a first position AI connects a first pressure regulator to the first clutch and disconnects it from the shifting system and in a second position BI connects the first pressure regulator to the shifting system and disconnects it from the first clutch, and that a second switching valve in a first position AII connects a second pressure regulator to the second clutch and disconnects it from the shifting system and in a second position BII connects the second pressure regulator to the shifting system and disconnects it from the second clutch.

Abstract: The invention relates to a twin-clutch transmission, in particular for a motor vehicle, comprising: a twin-clutch arrangement with clutches, input shafts, at least one output shaft, a number of gearwheel pairs and drive units. The first drive unit is connected to the input side of the twin-clutch arrangement and the second drive unit is connected to one of the input shafts or to the output shaft. The invention relates also to a methods for controlling the twin-clutch transmission, for example with the steps of disengaging the first clutch and the second clutch if these are engaged, and starting the engine by means of the first drive unit.

Abstract: A hydraulic system for providing pressure and volume flows in a double-clutch transmission. A first clutch and a second clutch are preceded by at least one changeover valve which, in a first state, guides lubricating flow to the first clutch and cooling flow to the second clutch, and, in a second state, guides lubricating flow to the second clutch and cooling flow to the first clutch. The cooling flow is preferably variable.

Abstract: The invention relates to a hydraulic system (1) for providing pressures and volumetric flows in a dual clutch transmission, in particular for providing a first volumetric flow for cooling and lubricating a first clutch (2) and for providing a second volumetric flow for cooling and lubricating a second clutch (3). The hydraulic system is distinguished by the fact that at least one switching valve (4), which in a first position guides a lubricating flow onto the first clutch (2) and a cooling flow onto the second clutch (3) and in a second position guides the lubricating flow onto the second clutch (3) and the cooling flow onto the first clutch (2), is connected upstream of the first clutch (2) and the second clutch (3). The cooling flow is preferably variable.

Abstract: The invention relates to a twin-clutch transmission, in particular for a motor vehicle, comprising: a twin-clutch arrangement with clutches, input shafts, at least one output shaft, a number of gearwheel pairs and drive units. The first drive unit is connected to the input side of the twin-clutch arrangement and the second drive unit is connected to one of the input shafts or to the output shaft. The invention relates also to a methods for controlling the twin-clutch transmission, for example with the steps of disengaging the first clutch and the second clutch if these are engaged, and starting the engine by means of the first drive unit.

Abstract: A twin-clutch transmission, in particular for a motor vehicle, with a twin-clutch arrangement comprising: a first clutch; a second clutch; a first input shaft; a second input shaft; at least one output shaft; a number of engageable gearwheel pairs for connecting the input shafts to the at least one output shaft; a first drive unit; and a second drive unit having a drive shaft rotatable around a rotational axis. The clutches having a common rotational axis connect the first and second input shafts to an engine. A serial and/or parallel hybrid mode of the twin-clutch transmission can be established by means of the first and second drive units. The first drive unit is arranged coaxially with the first and second clutches and surrounds the clutches in the radial direction. The drive shaft of the second drive unit and the clutches have different rotational axes.

Abstract: The invention provides a change gear, in particular in motor vehicles. This transmission comprises input and output shafts, a drive shaft that is in torque transmitting connection with the first and second output shafts; a first group of gear sets comprising at least one first gear set; a second group of gear sets comprising at least one second gear set; an itermediate shaft; and a first gear section. The input shaft is connectable with the first output shaft by the first group of gear sets. A second gear section is providcd in which the intermediate shaft is connectable to the second output shaft by the second group of gear sets. The intermediate shaft is in gearing connection with the first input shaft.

Abstract: The invention relates to a hydraulic system (1) for providing pressures and volumetric flows in a dual clutch transmission, in particular for providing a first volumetric flow for cooling and lubricating a first clutch (2) and for providing a second volumetric flow for cooling and lubricating a second clutch (3). The hydraulic system is distinguished by the fact that at least one switching valve (4), which in a first position guides a lubricating flow onto the first clutch (2) and a cooling flow onto the second clutch (3) and in a second position guides the lubricating flow onto the second clutch (3) and the cooling flow onto the first clutch (2), is connected upstream of the first clutch (2) and the second clutch (3). The cooling flow is preferably variable.

Abstract: The invention relates to a hydraulic control apparatus (1) for an automatic dual clutch transmission, which includes a first clutch (9) with a first partial transmission and a second clutch (13) with a second partial transmission, as well as a shifting system (12) for engaging/releasing gears of the two partial transmissions. The control apparatus (1) is distinguished by the fact that a first switching valve (7) in a position AI connects a first pressure regulator (3) to the first clutch (9) and disconnects it from the shifting system (12) and in a position BI connects the first pressure regulator (3) to the shifting system (12) and disconnects it from the first clutch (9), and that a second switching valve (8) in a position AII connects a second pressure regulator (4) to the second clutch (13) and disconnects it from the shifting system (12) and in a position BII connects the second pressure regulator (4) to the shifting system (12) and disconnects it from the second clutch (13).

Abstract: The invention to provide a change gear with a very short overall length in lengthwise direction that can be used as manual gear shift transmissions, automatic gear shift transmissions, and power gear shift transmissions, in particular in motor vehicles. This transmission comprises: at least a first input shaft; a first output shaft; a second output shaft; a drive shaft that is in torque transmitting connection with the first and second output shafts; a first group of gear sets comprising at least one first gear set; a second group of gear sets comprising at least one second gear set; an intermediate shaft; a first gear section in which the input shaft is connectable with the first output shaft by means of the first group of gear sets; a second gear section in which the intermediate shaft is connectable to the second output shaft by means of the second group of gear sets; wherein the intermediate shaft is in gearing connection with the first input shaft.

Abstract: In a multiple-speed grearbox having a selectively switchable dual friction clutches, a first clutch connected to a first input shaft, a second friction clutch connected to a second input shaft, gears belonging to gear pairs arranged on the first and second input shafts and meshing with gears on two countershafts, one of the countershafts provided with an output pinion, the gear pairs including a fixed gear and a loose gear connected selectively with its drive shaft by a synchronizer clutch, two loose gears having with synchronizing clutches arranged between these gears arranged on the first and second input shafts, and two pairs of loose gears having synchronizer clutches arranged between them arranged on the countershaft forming the output shaft.

Abstract: A continually variable transmission includes a torque converter for producing a hydrokinetic connection between a power source and input shaft, a low gear drive mechanism, a belt drive mechanism arranged in parallel with the low gear mechanism between the input shaft and an intermediate shaft, a forward-reverse gearset, a forward clutch, a reverse brake for controlling operation of the gearset in the direction of its output, and a mode clutch for alternately selecting the torque path between the input shaft and intermediate shaft.

Abstract: A control valve system for controlling the operation of a continuously variable belt-driven motor vehicle transmission includes a first hydraulic pump that supplies fluid to the displacement cylinders of the transmission through a main pressure regulating valve and a transmission ratio control valve as a function of the setting of the manual selector valve and as a function of the torque requirement and speed of the vehicle. The torque converter is supplied with hydraulic fluid by way of a relief valve which comes into operating in the event of failure of an electronic control unit and a decrease in the vehicle speed. A first emergency operation on/off valve transmits torque at converter discharge pressure, by way of a second emergency on/off valve, as emergency operation control pressure to a transmission ratio control valve.