A power take-off includes bell housing disposed about an axis and configured for coupling to a housing of an engine or other driving device at a first axial end and to a housing of a driven device at a second axial end. The bell housing defines an air inlet port and an air outlet port between the first and second axial ends. A clutch is disposed within the bell housing and configured to transfer torque from an input member coupled to the engine to an output member coupled to the driven device. A fan is configured for rotation with the input member to draw air into the bell housing through the air inlet port, move air through the bell housing from the air inlet port to the air outlet port in a substantially radial direction across the clutch and exhaust air from the bell housing through the air outlet port.

A power transmission apparatus for a hybrid electric vehicle having engine and motor may include: an input shaft coaxially disposed with an engine output shaft receiving engine torque; first and second output shafts disposed forward and rearward sides of the input shaft; a third output shaft coaxially disposed with the first output shaft; a shared drum connected to the input shaft and formed with a motor gear gear-meshed with the motor; an engine clutch arranged on the interior circumference of the shared drum and selectively transmitting torque between the engine output shaft and the input shaft; first and third clutches disposed within the shared drum and selectively transmitting torque from the input shaft to the first and third output shafts; and a second clutch disposed at a rearward side of the input shaft and selectively connecting the input shaft and the second output shaft.

A power transmission apparatus for a hybrid electric vehicle having engine and motor may include: an input shaft coaxially disposed with an engine output shaft receiving engine torque; first and second output shafts disposed forward and rearward sides of the input shaft; a third output shaft coaxially disposed with the first output shaft; a shared drum connected to the input shaft and formed with a motor gear gear-meshed with the motor; an engine clutch arranged on the interior circumference of the shared drum and selectively transmitting torque between the engine output shaft and the input shaft; first and third clutches disposed within the shared drum and selectively transmitting torque from the input shaft to the first and third output shafts; and a second clutch disposed at a rearward side of the input shaft and selectively connecting the input shaft and the second output shaft.

A cooling system for an automotive transmission is provided. The cooling system includes a housing defining a housing inlet. The housing defines an interior space that is in fluid communication with the housing inlet. A propeller assembly has a rotatable shaft and a blade extending from the rotatable shaft, which is configured to draw ambient air into the interior space of the housing through the housing inlet. A propulsion system assembly includes an engine configured to provide propulsion power through an engine output and an automotive transmission configured to receive the propulsion power from the engine output. A clutch is configured to selectively couple the engine output to the automotive transmission. The clutch is disposed in a housing, where the housing defines an ambient air inlet. A rotatable shaft having a blade is configured to draw ambient air into the housing through the ambient air inlet to cool the clutch.

A clutch assembly includes a housing, a rotational member configured to rotate relative to the housing about an axis, and a clutch pack coupled between the housing and the rotational member. The clutch pack is configured to regulate movement of the rotational member relative to the housing. The clutch pack includes a speed sensor ring coupled to the rotational member such that the speed sensor ring is configured to rotate with the rotational member about the axis. The clutch assembly includes a sensor in communication with the speed sensor ring. The sensor is configured to measure an angular velocity of the rotational member relative to the housing.

A hydraulic clutch device comprises an oil pump (7), a pressure regulating valve (8) for pressure-regulating oil discharged from the oil pump, and a hydraulic clutch (5) arranged in a power transmission route through which motive power is transmitted along a rotation shaft (4) from the power transmission part (2, 3), and engaged by the oil pressure-regulated by the pressure regulating valve. The pressure regulating valve is located on a downstream side in an oil flowing direction of the hydraulic clutch and arranged in the vicinity of an opposite side to the power transmission part in the axial direction of the rotation shaft with respect to the hydraulic clutch. With this configuration, it is possible to dispense with a pressure regulating valve arranged between a power transmission part and a hydraulic clutch and a valve body integrally provided with the pressure regulating valve in a conventional hydraulic clutch device.

A sealed actuator with internal clutching assembly including an output shaft, output detent ring, moving detent ring, and a wave spring, which is fit inside a sealed housing. The moving detent ring is able to move axially to the output shaft and the output detent ring is able to rotate on the output shaft. Intermeshing ramped teeth of these rings are held together by a wave spring and allow the output shaft to rotate and transmit torque of a motor through a main gear operably coupled to an output gear mounted on the output shaft to the outside of the housing. During predetermined high loads, the output and moving detent rings ramped teeth create an axial force that overcomes the load from the wave spring, which allows moving detent ring to disengage and output shaft to rotate freely to help prevent damage to the actuator.

A shaft coupling structure of the present invention includes a male joint and a female shaft that are coupled together. The outer peripheral surface of the male joint has an outer peripheral side concave-convex portion having a concave-convex shape in the circumferential direction and an annular concave groove, and the inner peripheral surface of the female shaft has an inner peripheral side concave-convex portion having a concave-convex shape in the circumferential direction. The outer peripheral side concave-convex portion and the inner peripheral side concave-convex portion engage with a concave-convex engagement. The outer peripheral surface of the male joint and an end portion on one side of the female shaft in the axial direction are welded and fixed together, and an embossed portion provided on the inner peripheral surface of the female shaft is arranged on the inner side of the annular concave groove.

A viscous fluid shear device having a housing, a rotor, which is rotatable in the housing, and a wiper that is coupled to the housing. The housing defines a scavenge conduit and a nozzle. Viscous fluid that clings to the circumference of the rotor during operation of the viscous fluid shear device is driven through the nozzle and directed by the wiper into the scavenge conduit.

A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a rotatable shaft and a cover substantially covering an end of the rotatable shaft. The cover includes a passageway fluidly coupled from outside the shaft to inside the shaft. The cover further includes a fin configured to prevent oil from entering the passageway.