A central release mechanism for a pneumatic clutch actuating device has a cylinder housing, which, about a central axis, delimits a ring-shaped pressure chamber wherein a ring-shaped piston which can be pneumatically pressurized via the pressure chamber and which is operatively connectable to a clutch is guided so as to be displaceable along the central axis. In the pressure chamber, between the ring-shaped piston and a base of the cylinder housing, a preload spring arrangement braces the ring-shaped piston and the cylinder housing apart from one another. A movement of the ring-shaped piston relative to the cylinder housing is detectable with a sensor arrangement which has a position detector and a position encoder. The preload spring arrangement has a multiplicity of distributed preload springs, angularly spaced apart from one another, about the central axis. Between the preload springs as viewed in a circumferential direction about the central axis, at least a part of the sensor arrangement is arranged in the region of the pressure chamber providing a compact construction.

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 in an axial direction with surfaces facing each other. 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. End plates at respective ends of the plate group are kept at a larger distance in the axial direction after a switch to the disengaged state than in the engaged state.

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 in an axial direction with surfaces facing each other. 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. End plates at respective ends of the plate group are kept at a larger distance in the axial direction after a switch to the disengaged state than in the engaged state.

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 in an axial direction with surfaces facing each other; and a piston configured to apply a pressing force to the plate group. 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. One of end plates at respective ends of the plate group is a movable end plate movable in the axial direction, and the other is a stationary end plate immovable in the axial direction. The movable end plate is biased by a spring.

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 in an axial direction with surfaces facing each other; and a piston configured to apply a pressing force to the plate group. 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. One of end plates at respective ends of the plate group is a movable end plate movable in the axial direction, and the other is a stationary end plate immovable in the axial direction. The movable end plate is biased by a spring.

A hydraulic clutch device includes a pressure regulating valve located on a downstream side in an oil flowing direction, a casing housing the hydraulic clutch, an insertion hole holding at least a part of the pressure regulating valve, an upstream side oil passage having an opening part introducing the oil from the hydraulic clutch into the insertion hole, and a downstream side oil passage having another opening part discharge the oil from the other opening part to the downstream side of the insertion hole. A position of a first virtual line (L1) which passes through the center-of-gravity point of a cross section of the opening part of the upstream side oil passage and a position of a second virtual line (L2) which passes through the center-of-gravity point of a cross section of the insertion hole are arranged so as to be different from each other.

A clutch actuator transmitting a disengaging force to a clutch disengaging device of a includes an actuating element which receives the disengaging force, and a piston rod for transmitting the disengaging force from the actuating element to the disengaging device. The piston rod bears against an actuating element connection region such that the piston rod is movable towards the connection region by the reaction force of the clutch. The positioning of the connection region and the piston rod relative to each other due to the movement can be fixed by applying the disengaging force to the actuating element. The actuating element at least partly deflects the disengaging force, producing a normal force and/or a radial force acting between the connection region and the piston rod. The normal force and/or the radial force fixes the position of the connection region and the piston rod relative to each other.

A clutch actuator transmitting a disengaging force to a clutch disengaging device of a includes an actuating element which receives the disengaging force, and a piston rod for transmitting the disengaging force from the actuating element to the disengaging device. The piston rod bears against an actuating element connection region such that the piston rod is movable towards the connection region by the reaction force of the clutch. The positioning of the connection region and the piston rod relative to each other due to the movement can be fixed by applying the disengaging force to the actuating element. The actuating element at least partly deflects the disengaging force, producing a normal force and/or a radial force acting between the connection region and the piston rod. The normal force and/or the radial force fixes the position of the connection region and the piston rod relative to each other.

A clutch device for a drivetrain of a vehicle, has a first clutch component for introducing torque and a second clutch component for transmission of torque. The second clutch component is rotationally uncouplable from the first clutch component. First frictional elements of the first clutch component and second frictional elements of the second clutch component may be connectible so that they transmit torque. The partial self-amplification of the clutch device is executable here by the leaf spring unit, while the second spring unit exerts a static clamping force. The leaf spring unit and the second spring unit are rotationally uncoupled.

A central release mechanism for a pneumatic clutch actuating device has a cylinder housing, which, about a central axis, delimits a ring-shaped pressure chamber wherein a ring-shaped piston which can be pneumatically pressurized via the pressure chamber and which is operatively connectable to a clutch is guided so as to be displaceable along the central axis. In the pressure chamber, between the ring-shaped piston and a base of the cylinder housing, a preload spring arrangement braces the ring-shaped piston and the cylinder housing apart from one another. A movement of the ring-shaped piston relative to the cylinder housing is detectable with a sensor arrangement which has a position detector and a position encoder. The preload spring arrangement has a multiplicity of distributed preload springs, angularly spaced apart from one another, about the central axis. Between the preload springs as viewed in a circumferential direction about the central axis, at least a part of the sensor arrangement is arranged in the region of the pressure chamber providing a compact construction.