A cooling assembly fluidly communicating with a vehicle cooling system includes a coolant tube and a mounting plate. The cooling assembly is configured for cooling a support bearing disposed in a dual clutch transmission. The coolant tube includes (i) an inlet end that receives a cooling medium, (ii) an outlet end that returns the cooling medium to the vehicle cooling system and (iii) a heat transfer portion incorporated between the inlet end and the outlet end. The mounting plate has a plate body including a bearing opposing surface and a transmission housing opposing surface. The bearing opposing surface contacts the support bearing. The heat transfer portion of the coolant tube is attached to the mounting plate such that cooling medium communicated through the coolant tube reduces temperature of the mounting plate and therefore the support bearing.

The power transmission device includes an internal-combustion engine 25, a drive-source-side shaft, a flywheel 30 provided on the drive-source-side shaft 2, a speed changer 10, which has an input shaft and an output, and clutches C1 and C2 capable of releasably transmitting the power between the drive-source-side shaft 2 and the input shaft, wherein the internal-combustion engine 25 and the speed changer 10 are disposed in the traveling direction of the vehicle. A differential gear mechanism 101 and a drive shaft 201, which are positioned between the flywheel 30 and the clutches C1 and C2 so as to be orthogonal to the drive-source-side shaft 2 and which transmit the power output from the speed changer 10 to left and right drive wheels RW, are provided. The drive shaft 201 is disposed above the central axis of rotation of the drive-source-side shaft 2.

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. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A shift control circuit operates a shift actuator using a first opposing pulse command and a first actuating pulse command, and releases pressure with shift actuating and opposing volumes of the shift actuator upon determining a shift completion event.

The present invention discloses a dual-clutch automatic transmission cooling and lubrication hydraulic control system and a vehicle. The dual-clutch automatic transmission cooling and lubrication hydraulic control system comprises a clutch lubrication control valve whose outlet end is connected with a clutch lubricating oil circuit, a gear lubrication control valve whose outlet end is connected with a gear and bearing lubricating oil circuit, the inlet end of the gear lubrication control valve being connected with the inlet end of the clutch lubrication control valve in parallel at the first common end, further comprises a mechanical pump and an electronic pump whose inlet ends are connected to an oil tank respectively. The outlet end of the mechanical pump and the outlet end of the electronic pump are connected in the second common end in parallel, and a cooler disposed between the first common end and the second common end. The dual-clutch automatic transmission cooling and lubrication hydraulic control system disclosed herein have a variety of working modes, reducing the defects such as large displacement of the mechanical pump when working alone.

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. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.

An in-case oil passage extending in an axial direction above a plurality of gears is formed inside an outer peripheral wall portion of the accommodating case. The in-case oil passage includes an in-case oil passage opening portion which opens from the cover wall portion to the one end side in the axial direction. The cover wall portion is provided with an oil guide member at a position where at least a part of the cover wall portion overlaps the in-case oil passage opening portion when viewed from the one end side in the axial direction, the oil guide member guiding oil discharged from the in-case oil passage opening portion to the oil collecting portion of the oil collecting pocket.

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 includes a single external power access for the shift actuator. A controller interprets controls the shift actuator with actuating and opposing pulses, and interprets a shaft displacement angle, determines if the transmission is in an imminent zero or zero torque region, and performs a transmission operation in response to the transmission in the imminent zero or zero torque region.

A power transmission device for a work vehicle includes a transmission case, a gear transmission housed in the transmission case and configured to transmit power to a travel device, and a transmission gear provided in the gear transmission in a state of sitting in lubricating oil stored in an internal space of the transmission case, the transmission case being provided with a wall part supporting a support shaft of the transmission gear in a state of being adjacent to the transmission gear, and the wall part being provided with a cover part protruding toward the outer periphery of the transmission gear from the wall part and covering the transmission gear.

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. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.