Abstract: The inventive double-clutch transmission element for a hybrid pull chain of a motor vehicle comprises a motion input shaft (37), a motion output shaft (39), an electrical machine (31) comprising a stator (61) and a rotor (63), a first clutch (33) providing a connection between the input shaft (37) and an intermediate member (73), and a second clutch (35) providing a connection between the intermediate member (73) and the output shaft (39), the intermediate member (73) being coupled in rotation to the rotor (63). A casing comprising a first half-shell (51) rotatably supporting the input shaft (37) and a second half-shell (52) rotatably supporting the output shaft (39) defines a housing in which the two clutches (33, 35) and the electrical machine (31) are mounted in a co-axial manner. The invention also relates to a motor vehicle equipped with such transmission element and to a method of mounting same.

Abstract: A torsion damper comprising juxtaposed resilient plates which operate in parallel and are interposed between a support member and a hub. Each resilient plate comprises at least one resiliently deformable arm. The torsion damper has at least two pairs of similar resilient plates. One of the pairs lies between the plates of the other pair and is offset with respect to the other pair by an angle such that the two pairs of plates are radially balanced. The resilient arms of any one pair are aligned with each other.

Abstract: A force transmission linkage for an automotive vehicle couples a control member with a maneuvering member of a declutching device for a clutch, and is of the kind comprising a mechanical part with application points carried by a fixed part of the vehicle.In accordance with the invention, one of the application points of the linkage is movable in both directions along a course of travel which is defined between two limit positions and under the action of an irreversible control device driven by a motor. At least one position sensor is associated with the control member and with the movable application point, respectively. A computer is provided, for receiving the information signals from the position sensors so as to control the motor of the control device.

Abstract: A force transmission linkage for an automotive vehicle couples a control member with a manoeuvring member of a declutching device for a clutch, and is of the kind comprising a mechanical part with application points carried by a fixed part of the vehicle.In accordance with the invention, one of the said application points of the linkage is movable under the action of a control device comprising a motor and a transmission acting between the said motor and the said movable application point. A sensor for detecting a supplementary strain in the linkage, is provided together with a computer, with the computer receiving information signals from the strain sensor for control of the motor.

Abstract: A force transmission linkage for an automative vehicle couples a control member with a manoeuvring member of a declutching device for a clutch, and is of the kind comprising a mechanical part with application points carried by a fixed part of the vehicle.In accordance with the invention, one of the application points of the linkage is movable in both directions along a course of travel which is defined between two limit positions and under the action of irreversible control device, which comprises a motor together with a transmission interposed between the motor and the movable application point. A position sensor is associated with the control member for detecting its free position when the latter is not actuated by the driver. Driving devices, comprising a computer and a detector, are provided.

Abstract: A torsion damper has a viscous damping device, a dry friction damping device, two guide rings, a damper plate and a hub. The viscous damping device is arranged outside the zone which is bounded by the guide rings, and is confined within a housing comprising two housing portions which are movable with respect to each other. Mutual engagement structure which couples components together for simultaneous rotation, are provided between (a) the hub and one of the housing portions and (b) the other portion of the housing and that one of the coaxial parts of the damper which is not coupled with the hub for rotation therewith.

Abstract: A damper-type flywheel comprises two coaxial parts adapted to rotate relative to each other about their common axis. A circumferentially acting spring device is operatively disposed between the two coaxial parts. An annular fluid-tight cavity is defined between the two coaxial parts. A viscous damper device accommodated in the fluid-tight cavity is mechanically disposed between the two coaxial parts. The viscous damper device may comprise two groups of fins in the annular cavity each constrained to rotate with a respective one of the two coaxial parts, the annular cavity containing a viscous, preferably non-Newtonian fluid such as a silicone-based fluid.

Abstract: A control linkage for a coupling device such as a clutch is designed to be coupled to an operating device. It comprises an output lever and, associated with and generally aligned with the output lever, a wear compensator. This comprises an actuator lever pivoted to the output lever and adapted to be constrained to pivot with the output lever by disengagable detent device. The detent device is operative through a demultiplier lever pivoted to the actuator lever and coupled to the output lever by a lost motion connection.

Abstract: In a torsional damper device with an elastic centering member, in particular for automotive vehicle clutches, two coaxial parts are disposed to rotate relative to each other against an elastic member which is adapted to return them to a rest mean position and which is a block of elastic material adapted to bear directly on corresponding shoulders on the coaxial parts concerned. The elastic member has a recess in the median area of each circumferential end.

Abstract: A hydraulic valve device for a hydraulic circuit controlling clutches, brakes and similar mechanisms comprises a non-return valve provided between a tank and a chamber. The non-return valve incorporates a ball accommodated in a cylindrical cavity and interacting with a leak-proof seat located on the same side as the tank, and a permeable seat located on the same side as the chamber. This arrangement eliminates the risk of the hydraulic liquid in the tank overloading the circuit during abrupt depressurization of the circuit.