A vehicle supercharging system may include: an engine; a transmission; a dual-turbine electric supercharger that compresses air and has a first turbine and a second turbine; an engine-side supercharging path part that branches out from an air supplying line configured to supply air to the engine, passes through the first turbine and then joins into the air supplying line; a transmission-side supercharging path part that sucks air separately from the engine-side air supplying line, passes through the second turbine, and then supplies compressed air to the transmission; and a controller that operates the dual-turbine electric supercharger according to a driving state of a vehicle and that individually controls valves provided in the engine-side supercharging path part and the transmission-side supercharging path part.

A transmission includes an input shaft that couples to a prime mover, twin countershafts and a main shaft having gears coupled thereon, an output shaft that selectively provides a torque output to a driveline, a first shift actuator that selectively couples the input shaft to the main shaft. The transmission includes a second shift actuator that couples the main shaft to the output shaft with a selected reduction ratio, and a controller including a vehicle state circuit that interprets at least one vehicle operating condition, and a neutral enforcement circuit that provides a first neutral command to the first shift actuator and a second neutral command to the second shift actuator, in response to the at least one vehicle operating condition indicating that vehicle motion is not intended.

A transmission housing assembly includes a transmission housing and a freewheel including an inner ring and an outer ring. The inner ring is non-positively connectable to a motor shaft, and a steel bearing bush is inserted into an opening of the transmission housing, into which the freewheel is pressed in order to press-fit the outer ring with the steel bearing bush and the transmission housing.

A transmission housing assembly includes a transmission housing and a freewheel including an inner ring and an outer ring. The inner ring is non-positively connectable to a motor shaft. The transmission housing includes a steel bearing bush overmolded with aluminum, which defines an opening of the transmission housing into which the freewheel is pressed.

A case includes a main body made of a magnesium alloy, and configured to house oil therein. An inner wall surface of the main body is coated with a black film.

A P2 transmission and engine assembly includes a transverse mounted transmission having: a transmission first end and a transmission second end oppositely positioned with respect to the transmission first end; and a transmission gearbox portion having a first cavity positioned at the second end. A torque converter is positioned at the transmission first end. An electric motor is positioned within the first cavity and is rotatably connected to the torque converter using a turbine shaft. A one-way clutch is connected to the turbine shaft and releasably connects the turbine shaft to the torque converter. The one-way clutch when disengaged disconnects the torque converter from the turbine shaft.

A transmission includes an input shaft that couples to a prime mover, twin countershafts and a main shaft having gears coupled thereon, an output shaft that selectively provides a torque output to a driveline, a first shift actuator that selectively couples the input shaft to the main shaft. The transmission includes a second shift actuator that couples the main shaft to the output shaft with a selected reduction ratio, and a controller including a vehicle state circuit that interprets at least one vehicle operating condition, and a neutral enforcement circuit that provides a first neutral command to the first shift actuator and a second neutral command to the second shift actuator, in response to the at least one vehicle operating condition indicating that vehicle motion is not intended.

A vehicle supercharging system may include: an engine; a transmission; a dual-turbine electric supercharger that compresses air and has a first turbine and a second turbine; an engine-side supercharging path part that branches out from an air supplying line configured to supply air to the engine, passes through the first turbine and then joins into the air supplying line; a transmission-side supercharging path part that sucks air separately from the engine-side air supplying line, passes through the second turbine, and then supplies compressed air to the transmission; and a controller that operates the dual-turbine electric supercharger according to a driving state of a vehicle and that individually controls valves provided in the engine-side supercharging path part and the transmission-side supercharging path part.

An automatic transmission is provided, which includes a transmission case having a vertical wall part, a clutch disposed on a first side of the vertical wall part in an axial direction, a given component disposed on the second side of the vertical wall part, and a sleeve having a cylindrical body and a flange part coupled to the second side of the vertical wall part and disposed radially inward of the given component. The hydraulic fluid is supplied to the clutch from radially inward of the clutch through the vertical wall part. An oil supply passage is configured to supply the hydraulic fluid to the radially inward of the clutch through a first oil passage extending in the axial direction via a coupling part between the vertical wall part and the flange part, a second oil passage inside the flange part, and a third oil passage inside the cylindrical body.

A transmission for a vehicle includes a clutch unit connectable to an input shaft of the transmission and an electric motor connected to the clutch unit for transferring torque from the electric motor to the input shaft through the clutch unit. The transmission has a first gear component driven by the electric motor and a second gear component rotationally locked to the clutch unit by an engagement means. The first and second gear components are engaged with each other for transferring torque from the electric motor to the clutch unit. The transmission further has at least one bearing arranged for journaling the second gear component and carrying radial load caused by the electric motor when torque is transferred from the electric motor to the clutch unit. The engagement means is designed to allow a radial run out of the clutch unit relative to the second gear component.