The invention relates to a clutch mechanism intended to be installed between an engine and a transmission of a motor vehicle, the mechanism being configured to be installed on a transmission (400) in two steps and by means of a system for axial locking of the control system (300) with respect to the clutch (100, 200). The axial locking system comprises a first axial locking element (304, 302) for implementing at least an axial retention between the control system (300) and the transmission (400), and a second axial locking element (600) for implementing at least an axial retention between the clutch (100, 200) and a shaft (A1, A2) of the transmission, and a means for rotational coupling of the clutch support (500) with respect to the control system (300), the rotational coupling means being different from the axial locking system.

A lock-up device for a torque converter transmits a torque from a front cover to a transmission-side member through a turbine. The lock-up device includes a clutch portion, a piston, a support member, and a synchronization mechanism. The clutch portion is disposed between the front cover and the turbine. The piston is movable in an axial direction. The piston turns the clutch portion into a torque transmission state. The support member supports the piston such that the piston is movable. The support member defines an oil chamber together with the piston. The oil chamber is supplied a hydraulic oil for activating the piston. The synchronization mechanism causes the piston to rotate in synchronization with the support member.

This clutch control device is provided with: a first valve; a second valve; a valve control unit configured to control the operation of each of the first valve and the second valve; an operation determination unit configured to perform an operation determination for the clutch device; and an initial operation completion determination unit which determines whether an initial operation of the clutch device has been completed. The valve control unit, if it is determined by the operation determination unit that an on-off switching process is required, subjects both the first valve and the second valve to opening-control. If it is determined by the initial operation completion determination unit that the initial operation has been completed, the valve control unit subjects the second valve to closing-control.

A housing of a solenoid valve unit for controlling a central clutch actuator of a utility vehicle is configured for installation in a transmission housing, preferably in a clutch case, and for accommodating at least one solenoid valve. The housing has an elongate housing shape that is curved along its longitudinal direction to enable installation in tight spaces.

A pneumatic clutch actuator is described herein. The pneumatic clutch actuator includes a piston housing and a piston slidably received within the piston housing and configured to selectively change a clutch state between an engaged state and a disengaged state. The piston includes a self-adjustment mechanism that is configured to adjust an axial length of the piston. The self-adjustment mechanism includes a position locking assembly that includes a locking member and a positioning member. The locking member includes a plurality of locking flanges spaced along an outer surface of the locking member. The positioning member includes a plurality of positioning slots that are spaced along the positioning member. The position locking assembly is positionable between an unlocked state with the locking member spaced a distance from the positioning member, and a locked state with at least one locking flange inserted into a corresponding positioning slot.

A position detection unit for detecting a position of an actuating element, disposed within a housing of a clutch actuator of a vehicle clutch, including: a magnetic encoder element in the housing of the clutch actuator on the actuating element, a sensor outside the housing of the clutch actuator and is configured so that it has a detection space within which the sensor can detect a position of the magnetic encoder element within a predefined range of motion of the magnetic encoder element, and a protective device to prevent ferritic filings attracted by the magnetic encoder element from being deposited within the detection space. Also described is a related clutch actuator.

The automatic transmission has, on an axis of a power transmission shaft: a one-side clutch including a plurality of friction plates; and an other-side clutch including a plurality of friction plate. A pressing section of a piston of the one-side clutch and a pressing section of a piston of the other-side clutch are arranged to overlap each other in an axial direction. On one side in the axial direction of the plurality of friction plates of the one-side clutch, a radial section of the piston of the one-side clutch and a radial section of the piston of the other-side clutch are arranged in parallel in the axial direction. Pressure-receiving sections of the pistons of the one-side clutch and the other-side clutch and bearing sections of the pistons of the one-side clutch and the other-side clutch are aggregated and arranged on a radially inner side.

A hydraulic actuating device for a coupling device having an actuating piston, a piston chamber assigned to the actuating piston and a supply chamber which is arranged further inwards in the radial direction than the piston chamber and via which a hydraulic fluid can be supplied to the piston chamber, wherein the supply chamber is delimited in a first axial direction by a first housing part and in a second axial direction opposite to the first axial direction by a second housing part, and the first housing part is fastened to a hub. The first housing part is fastened to the hub by clamping the second housing part in the axial direction between the first housing part and the hub. Furthermore, the present invention relates to a coupling device having such an actuating device as well as a method for manufacturing such an actuating device.

A pneumatic actuator (1) includes a pneumatic piston (4) and a pneumatic body (6) that includes a main body (8) and a guide shaft (10) for guiding the pneumatic piston (4). A pneumatic chamber (14) is defined between the guide shaft (10) and the main body (8). The pneumatic piston (4) is received in the pneumatic chamber (14) and slidably arranged on the guide shaft (10). The main body (8) and the guide shaft (10) are separate elements, wherein the guide shaft (10) is fixed to a fixing portion (16). The main body (8) is made from a first material (M1) and the guide shaft (10) is made from a second material (M2) having a higher wear resistance than the first material (M1). The actuator may be used in a clutch assembly (104) and a commercial vehicle (101).

A clutch release bearing for a motor vehicle includes a thrust element having an axial axis, a guide element supporting said thrust element, and a self-aligning sleeve including an annular body and a plurality of radial ribs extending towards the guide element from the body with a free end of each of the ribs radially contacting the guide element. The guide element includes angular retaining members for limiting angular movement of at least one radial rib of the plurality of radial ribs, which members may be integrally formed with the guide element or formed as separate elements attached to the guide element.