A clutch pack for a clutch in a drive train of a motor vehicle includes an axis defining an axial direction and a disk, rotatable about the axis, for contacting a counter-disk to transfer a torque. The disk includes a main body with a contact region for absorbing torque from or transferring a torque to the counter-disk, a toothed region for torque-transmitting contact with a disk carrier, and a region of specific elastic softness in the axial direction disposed between the contact region and the toothed region. In an example embodiment, the region of specific elastic softness in the axial direction is a steel sheet spring region.

A clutch pack for a clutch in a drive train of a motor vehicle includes an axis defining an axial direction and a disk, rotatable about the axis, for contacting a counter-disk to transfer a torque. The disk includes a main body with a contact region for absorbing torque from or transferring a torque to the counter-disk, a toothed region for torque-transmitting contact with a disk carrier, and a region of specific elastic softness in the axial direction disposed between the contact region and the toothed region. In an example embodiment, the region of specific elastic softness in the axial direction is a steel sheet spring region.

A fast release mechanism for a twin plate friction clutch including a biasing member positioned between the intermediate plate and the flywheel surface, and a retaining member for retaining the biasing member in place relative to the intermediate plate or flywheel surface during installation. In one embodiment, the fast release mechanism comprises a spring and a clip that retains the spring in place relative to the intermediate plate. When used with positioner pins extending through the intermediate plate, each clip may be U-shaped and includes a hole on its upper wall and a slot on its lower wall sized to receive the pin. The arms defining the slot extend partly over the end of the springs to keep the spring in place.

A friction engagement device includes a rotating shaft, first friction plates that rotate with the rotating shaft, second friction plates arranged to face the first friction plates, an oil chamber supplied with hydraulic fluid, a piston movably provided between engagement and release positions, and first and second return springs. The piston is pressed toward the engagement position by hydraulic pressure of the oil chamber. The first return spring contacts the piston from the engagement position to a standby position between the release position and the engagement position and urges the piston toward the release position. The second return spring contacts the piston from the engagement position to the release position and urges the piston toward the release position. Center axes of the first and second return springs are arranged to coincide with a center axis of the rotating shaft.

A friction engagement device includes a rotating shaft, first friction plates that rotate with the rotating shaft, second friction plates arranged to face the first friction plates, an oil chamber supplied with hydraulic fluid, a piston movably provided between engagement and release positions, and first and second return springs. The piston is pressed toward the engagement position by hydraulic pressure of the oil chamber. The first return spring contacts the piston from the engagement position to a standby position between the release position and the engagement position and urges the piston toward the release position. The second return spring contacts the piston from the engagement position to the release position and urges the piston toward the release position. Center axes of the first and second return springs are arranged to coincide with a center axis of the rotating shaft.

The present disclosure provides a wet friction engaging device. The device includes: a plate group engaged with two connecting members and including two groups of friction plates housed in a plate housing chamber and alternately arranged; and a spring attached between a spring plate and an end plate. The plate group is switched between an engaged state in which the friction plates are in close contact with each other, and a disengaged state in which the friction plates are separable from each other. The spring plate is fixed to the end plate.

The present disclosure provides a wet friction engaging device. The device includes: a plate group engaged with two connecting members and including two groups of friction plates housed in a plate housing chamber and alternately arranged; and a spring attached between a spring plate and an end plate. The plate group is switched between an engaged state in which the friction plates are in close contact with each other, and a disengaged state in which the friction plates are separable from each other. The spring plate is fixed to the end plate.

A clutch pack for a clutch in a drive train of a motor vehicle includes an axis defining an axial direction and a disk, rotatable about the axis, for contacting a counter-disk to transfer a torque. The disk includes a main body with a contact region for absorbing torque from or transferring a torque to the counter-disk, a toothed region for torque-transmitting contact with a disk carrier, and a region of specific elastic softness in the axial direction disposed between the contact region and the toothed region. In an example embodiment, the region of specific elastic softness in the axial direction is a steel sheet spring region.

A clutch pack for a clutch in a drive train of a motor vehicle includes an axis defining an axial direction and a disk, rotatable about the axis, for contacting a counter-disk to transfer a torque. The disk includes a main body with a contact region for absorbing torque from or transferring a torque to the counter-disk, a toothed region for torque-transmitting contact with a disk carrier, and a region of specific elastic softness in the axial direction disposed between the contact region and the toothed region. In an example embodiment, the region of specific elastic softness in the axial direction is a steel sheet spring region.

A wet-type multi plate clutch having a obtaining hydraulic chamber, which is capable of increasing a fuel consumption efficiency by reducing a load of an oil pump for clutch oil for engaging the clutch and which realizes a simplified structure by eliminating a necessity of a canceller chamber. A disk spring 46 is, at its outer peripheral part, is supported by a clutch drum 10 and contacts, at its inner peripheral part, with a spring presser part 12-1 of the piston 12. The disk spring 46 faces, at the side opposite the piston 12, with clutch pack 20. A forward movement of the piston 12 by operating pressure in a hydraulic chamber is transmitted to the clutch pack 20 via the disk spring 46, resulting in an engaged condition of the clutch pack 20. A driving force of the piston 12 by the hydraulic oil pressure is boosted under a lever ratio a/b of the disk spring 46 and is transmitted to the clutch pack 20. The disk spring 46 to the spring presser part 12-1 without obstructing the slide movement of the piston 12 of obtaining an increased radial length of the spring, resulting in an increased return force of the spring 46 for a positive reverse movement of the piston 12 for obtaining a disengaged condition of the clutch.