A dual-clutch actuator with a hydraulic pump, a first and second clutch hydraulic circuits and at least a first shift hydraulic circuit, the shift hydraulic circuit being connected to the hydraulic pump and has a control valve with a return connection. The first clutch hydraulic circuit is connected to the return connection and has a control valve. The second clutch hydraulic circuit is connected to the hydraulic pump and has a control valve. A drive assembly for a vehicle axle of a motor vehicle having an electric motor, a gearbox with an input which is connected to the electric motor, a first and a second gear and an output, a dual clutch arranged between the electric motor and the input of the gearbox, a synchronization assembly arranged between the first gear and the output of the gearbox and an actuator of this kind. The first shift hydraulic circuit is coupled with the synchronization assembly of the first gear.

Hydraulic control device for an automated dual clutch transmission having first and second clutches with first and second sub-transmissions and also a gear shifting system. The hydraulic control device has a regulating unit that predetermines at least one regulated pressure and/or one regulated volume flow for actuating the first and second clutches and shifting system. The hydraulic control device has a switching device that is arranged between the regulating unit and the clutches or the shifting system, switching the regulated pressure or volume flow to the clutches or the shifting system. The regulating unit includes a first regulating valve and a second regulating valve that is connected to an oil pressure supply having a system pressure regulator and an electric oil pump.

The invention relates to a hydraulic circuit (100, 200, 300) having a first, hydraulically actuable clutch (K1) which is closed in a rest state and a second, hydraulically actuable clutch (K2) which is closed in the rest state, wherein the hydraulic circuit (100, 200, 300) is configured in such a way that a hydraulic medium which is present in a main pressure line (HD) can be loaded with a working pressure by means of a pressure generating device (DE) and/or by means of a pressure accumulator (DS), and the hydraulic medium can be discharged for pressure dissipation via a main return line (HR) into the return reservoir (T), and wherein the hydraulic circuit (100, 200, 300) has a first distributor pressure line (VD1) and a separate, first collector return line (SR1) for the hydraulic supply of a first part circuit (TK1) and at least one separate, second distributor pressure line (VD2) and at least one separate, second collector return line (SR2) for the hydraulic supply of a second part circuit (TK2), wherein the first clutch (K1) is assigned to the first part circuit (TK1) and the second clutch (K2) is assigned to the second part circuit (TK2), and wherein, in an operating state of the hydraulic circuit (100, 200, 300), either the first collector return line (SR1) or the second collector return line (SR2) is connected hydraulically to the main pressure line (HD).

One solenoid valve included in a hydraulic pressure control device has at least two functions among the following (1) to (6) functions, (1) switching a state of a two-way clutch, (2) switching a state of a parking lock mechanism, (3) switching the supply of hydraulic pressure to a first brake that is put into an engaged state when a gear stage selected when driving of a vehicle starts is set, (4) controlling a line pressure adjustment valve so that a decrease in a line pressure is prevented when the temperature of a hydraulic fluid is a first predetermined temperature or higher, (5) preventing the occurrence of a creep phenomenon in a neutral range when the temperature of the hydraulic fluid is a second predetermined temperature or lower, and (6) boosting a line pressure by performing switching to another linear solenoid valve when the line pressure adjustment valve has failed.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.