Abstract: A friction starter drive unit for a starter, comprising: a pinion including a hole for the passage of a drive shaft; a drive part including a hole for the passage of a drive shaft, said drive part being mounted such as to be rotationally fixed with the pinion; a drive element including a hole for the passage of a drive shaft of a starter, which element can move in translation along axis X of the hole in relation to the drive part between an uncoupled position and a coupled position; and a friction coupling means arranged to couple the drive element to the drive part when the drive element is in the coupled position. The starter drive unit comprises a return means that exerts a force on the drive element and a force on the drive part in the direction of the uncoupled position.

Abstract: Mobile assembly (500) for meshing with a toothed starter ring gear (C) of a heat engine comprises: a drive unit (1) provided with a pinion (11); a starter drive element (118); a pivoting control lever (20) including a lower forked end having two arms; and a friction clutch (300), pinion being rotationally fixed with a casing partially housing the drive element (118) and comprising the reaction plate (112) of the clutch. The lever (20) is associated with means for closing the clutch and is configured to move the casing axially, while the closure means are configured to move the drive element axially in order to tighten the friction clutch. The heat engine starter comprises such a mobile assembly.

Abstract: The invention relates to a device for controlling a starter for a heat engine that is equipped with an electric motor having a field coil with several windings and an armature winding, both of which are mounted in series, comprising a power contact which is equipped with terminals, one of said terminals being connected to the positive terminal (+Bat) of a battery and the other terminal being connected to the field coil having several windings. The inventive device comprises first means which, in a first phase upon closure of the power contact, activate part of the windings of the field coil and second delayed-action means which, in a second phase during which the power contact is always closed, activate at least a large number of the windings of the coil. The invention is intended for the heat engine starter of a vehicle.

Abstract: The invention relates to a device for controlling a starter for a heat engine that is equipped with an electric motor having a field coil with several windings and an armature winding, both of which are mounted in series, comprising a power contact which is equipped with terminals, one of said terminals being connected to the positive terminal (+Bat) of a battery and the other terminal being connected to the field coil having several windings. The inventive device comprises first means which, in a first phase upon closure of the power contact, activate part of the windings of the field coil and second delayed-action means which, in a second phase during which the power contact is always closed, activate at least a large number of the windings of the coil. The invention is intended for the heat engine starter of a vehicle.

Abstract: Motor vehicle starter comprising a starter head provided with a pinion (1), a driver (2) and a coupling device with a conical clutch for coupling the pinion to the driver (2), in which the conical clutch comprises a first frustoconical friction surface (8) fixed to the pinion and a second frustoconical friction surface (8?) with a shape complementary to the first surface (8) and fixed to the driver and in which the coupling device comprises on the one hand a hollow-shaped coupling piece having. a bottom extended by an annular skirt directed axially towards one of the elements consisting of pinion and driver and on the other hand axially acting elastic means (10) bearing on a first stop fixed to the coupling piece for acting on a second stop fixed to one of the elements consisting of pinion and driver. The elastic means comprise axially deformable tongues (10b) and extend circumferentially.

Abstract: Motor vehicle starter comprising a starter head provided with a pinion (1), a driver (2) and a coupling device with a conical clutch for coupling the pinion to the driver (2), in which the conical clutch comprises a first frustoconical friction surface (8) fixed to the pinion and a second frustoconical friction surface (8′) with a shape complementary to the first surface (8) and fixed to the driver and in which the coupling device comprises on the one hand a hollow-shaped coupling piece having a bottom extended by an annular skirt directed axially towards one of the elements consisting of pinion and driver and on the other hand axially acting elastic means (10) bearing on a first stop fixed to the coupling piece for acting on a second stop fixed to one of the elements consisting of pinion and driver; the skirt is fixed to the pinion or driver and carries internally the surface (8, 8′) concerned.

Abstract: Motor vehicle starter comprising a starter head provided with a pinion (1), a driver (2) and a coupling device with a conical clutch for coupling the pinion to the driver (2), in which the conical clutch comprises a first frustoconical friction surface (8) fixed to the pinion and a second frustoconical friction surface (8′) with a shape complementary to the first surface (8) and fixed to the driver and in which the coupling device comprises on the one hand a hollow-shaped coupling piece having a bottom extended by an annular skirt directed axially towards one of the elements consisting of pinion and driver and on the other hand axially acting elastic means (10) bearing on a first stop fixed to the coupling piece for acting on a second stop fixed to one of the elements consisting of pinion and driver. The elastic means comprise axially deformable tongues (10b) and extend circumferentially.

Abstract: A starter head for the starter of an internal combustion engine includes a motor shaft, on which a starter pinion is mounted for axial sliding movement. A free wheel and a driving sleeve are secured on the starter pinion by means of a securing shroud. The starter pinion has a bore over the whole of its length, with the motor shaft being displaceable within this bore. The starter has a device for limiting the axial throw of the starter head. The throw limiting device comprises a stop ring cooperating with a further ring fixed on the free end of the engine shaft within the bore of the pinion. The stop ring is fitted in a semicylindrical groove formed in the bore.