Abstract: An actuator, especially for a motor vehicle clutch, is of the kind that has a casing carrying a reversible electric motor which has a drive spindle, a driving element for coupling the actuator to an actuating member of the clutch, a coupling mechanism which couples the motor drive spindle to the driving element and which includes a toothed sector plate coupled in rotation to the driving element. The coupling mechanism also includes an actuating force reducing mechanism having a compensating spring. The actuating force reducing mechansim includes a compensating lever which is articulated on the toothed sector plate and on an intermediate pivoting lever, which is itself articulated to the casing, the intermediate pivoting lever being coupled to the compensating spring.

Abstract: An actuator comprising, in a casing, a mechanism which is controlled by a motor and which is adapted to control an output member. The mechanism including in particular a moveable thrust unit which is arranged generally for to and fro movement. The casing is liquid-tight, and incorporates a sump for containing a liquid lubricant. A pump is associated with this sump, the pump being arranged to be actuated by the moveable thrust unit. The suction port is in communication with the lower part or sump of the casing, while its delivery port is in communication with the mechanism in at least one region of the latter that is to be lubricated.

Abstract: The invention proposes a detection device including a selector linkage with a gear change lever, with which are associated a force threshold detector, a first analog position detector connected to gear shift means, and a circuit for firstly activating an automatic clutch actuating system and secondly processing information received by the threshold detecting means and the first detector. A second analog position detector is connected to line selector and is responsive to information applied to the gear change lever, the second detector being connected to the processing and control circuit.

Abstract: Motorized control device, suitable for a motor vehicle clutch, comprises a motor which activates a shaft and a lever by means of a connection mechanism associated with a force moderator arrangement incorporating a spring; according to the invention, this spring is mounted under compression.

Abstract: A device detects forces in a gearbox operating linkage in order to control an automatic clutch operating system for the purpose of changing the gear ratio. The linkage comprises a shaft in the gearbox adapted to rotate between two limiting positions corresponding to selection of respective different gear ratios. It also comprises a deformable linkage element in the force detecting device adapted to move between two limiting positions corresponding to the limiting positions of the shaft. This deformable linkage element comprises two portions coupled together elastically by an elastic return device. The force detecting device comprises a speed parity detector adapted to assume a parity state representing the position of the shaft and varying according to which of its limiting positions the shaft is in.