Abstract: Transmission system for a motor vehicle includes a differential drive device configured to distribute a torque to two wheel shafts of an axle, and which includes a coupling device having a coupled position in which the transmission of the torque via the differential drive device is provided and a decoupled position in which the transmission of the torque via the differential drive device is interrupted. The coupling device includes an actuator including a piston guided in axial translation between a retracted position and an extended position; and a thrust bearing which is inserted between the piston and a first coupling part of the coupling device so as to transmit an actuating force of the piston to the first coupling portion and to move the first coupling portion from the uncoupled position to the coupled position during the movement of the piston from the retracted position to the extended position.

Abstract: A method for controlling the position of a movable element in a device of a vehicle transmission. The method includes (i) angularly displacing a control plate, (ii) measuring the angular position of a torque output element of an actuator and comparing the measured value with a limiting threshold value (m), and (iii) reducing the rotating speed of the electric motor of the actuator. The method further includes (iv) applying a limited current (Ilim) to the electric motor of the actuator, and (v) stopping the driving of the electric motor when, cumulatively, the value of the limited current (Ilim) is substantially reached, the measured value of the angular position of the torque output element of the actuator corresponds substantially to the desired position, and the angular speed of the torque output element is substantially zero.

Abstract: Transmission system for a motor vehicle includes a differential drive device configured to distribute a torque to two wheel shafts of an axle, and which includes a coupling device having a coupled position in which the transmission of the torque via the differential drive device is provided and a decoupled position in which the transmission of the torque via the differential drive device is interrupted. The coupling device includes an actuator including a piston guided in axial translation between a retracted position and an extended position; and a thrust bearing which is inserted between the piston and a first coupling part of the coupling device so as to transmit an actuating force of the piston to the first coupling portion and to move the first coupling portion from the uncoupled position to the coupled position during the movement of the piston from the retracted position to the extended position.

Abstract: The invention relates to a fluid circulation valve for a motor vehicle, including a valve body (2) having a conduit (3), a flap (5) closing off the conduit (3) fastened on a shaft (4), a rotary control member (21) of the shaft (4), fastened at a proximal end (12) of the shaft (4) and the rotation of which selectively commands the opening and closing of the conduit (3) by the closing flap (5), and a torsional return spring (42) of the control member (21), a stop (76) being provided at one distal end (11) of the shaft (4), opposite the proximal end (12), to keep the closing flap (5) in the axial position in the conduit (3) by cooperation with the valve body (2), against a force of the return spring (42), the stop (76) including a flat washer (102) fastened on the lateral end (11) of the shaft (4).

Abstract: The electromagnetic valve actuator has an armature (22) of ferromagnetic material fixed to the stem of the valve, springs are provided to hold the valve at rest in a middle position between a fully open position and a closed position, and a single coil (38) is mounted on a ferromagnetic circuit. In combination with the armature, the magnetic circuit presents two stable magnetic flux paths both of which correspond to an airgap of small size.

Abstract: The components (13, 14) are mounted on a two-faced printed circuit (22) fened to a metal heat-conductive substrate (12) which is integral with the housing and to which a connector (8) is electrically connected which is also integral with the housing and is arranged on the same side of the substrate (12) as the printed circuit (22). The metal heat-conductive substrate (12) has a cutout to serve as support for the connector (8) which is soldered on the face of the printed circuit (22) facing the substrate (12) at the place of the cutout. The invention is advantageous for switches associated with computer controlled actuators.