The invention relates mainly to a starter (11) for a motor vehicle combustion engine, comprising: an electric motor (15), a drive pinion (60), a pinion body (61) on which said drive pinion (60) is mounted, a drive shaft (12) able to transmit a torque derived from the electric motor (15) to the drive pinion (60) via the pinion body, the pinion body (61) being mounted with the ability to slide axially with respect to the drive shaft (12), and in which, with there being a chamber (86) delimited notably by one end of the drive shaft (12) and one end of the pinion body (61) opposite the end of the drive shaft (12), the chamber (86) is vented via a through-opening (85) made in an annular wall of the drive shaft (12) or of the pinion body (61).

The invention relates mainly to a starter (11) for a motor vehicle combustion engine, comprising: an electric motor (15), a drive pinion (60), a pinion body (61) on which said drive pinion (60) is mounted, a drive shaft (12) able to transmit a torque derived from the electric motor (15) to the drive pinion (60) via the pinion body, the pinion body (61) being mounted with the ability to slide axially with respect to the drive shaft (12), and in which, with there being a chamber (86) delimited notably by one end of the drive shaft (12) and one end of the pinion body (61) opposite the end of the drive shaft (12), the chamber (86) is vented via a through-opening (85) made in an annular wall of the drive shaft (12) or of the pinion body (61).

A transmission for electric vehicle may include first input shaft connected to motor, first planetary gear set including first rotation element selectively connectable to the first input shaft and third rotation element which is fixed, second planetary gear set including first rotation element directly connected to the first input shaft and third rotation element directly connected to second rotation element of the first planetary gear set, first clutch selectively connecting the first input shaft and second rotation element of the second planetary gear set, output shaft, driving gear rotating with the second rotation element of the second planetary gear set, driven gear engaged with the driving gear, second clutch selectively connecting the first rotation element of the first planetary gear set to the first input shaft, and third clutch disposed to fix or engage the third rotation element of the second planetary gear set with the driving gear.

An automatic two-mode high reduction power transmission system. A power transmission system includes a first device that delivers a first input and receives a second output. A second device delivers a second input and receives a first output. A power transmission has two planetary gear sets and operates in a first mode at a first speed ratio, where the first input is received from the first device and in response, the first output is delivered to the second device. The power transmission operates in a second mode at a second speed ratio that is different than the first speed ratio, where the second input is received from the second device and in response, the second output is delivered to the first device. A pair of freewheel mechanisms automatically couple one of the first or second devices with the power transmission to provide the two modes.

A drive pinion for a starter of an internal combustion engine for engaging in a ring gear of the internal combustion engine may include a toothing including a plurality of teeth each having an active flank, a passive flank, and a head surface. The plurality of teeth may extend radially outwards from a root circle of the toothing. The drive pinion may further include a plurality of bevels disposed on an end side. The plurality of bevels may include a head bevel disposed between the head surface and the end side, a passive flank bevel disposed between the passive flank and the end side, and an active flank bevel disposed between the active flank and the end side.

A vehicle engine electric starter motor can bring a vehicle engine crankshaft up to a desired spinning speed prior to igniting the accompanying vehicle engine by way of multiple speed ratios. The vehicle engine electric starter motor includes a planetary gearset assembly. The planetary gearset assembly receives rotational drive input from an armature shaft, and transmits rotational drive output to an engine flywheel. Amid use of the vehicle engine electric starter motor, the vehicle engine electric starter motor can provide a first speed ratio by way of the planetary gearset assembly between the rotational drive input and the rotational drive output in a first mode of operation. And the vehicle engine electric starter motor can provide a second speed ratio by way of the planetary gearset assembly between the rotational drive input and the rotational drive output in a second mode of operation.

The invention relates to an electromagnetic starter relay having an armature that is axially adjustably arranged, and having a pull-in winding, a hold-in winding and a switching winding. The hold-in winding is connected in series to the pull-in winding, wherein, in a phase stage of the meshing phase only the pull-in winding can be energised and in a different phase stage both the pull-in winding and the hold-in winding can be energised.

A drive system for an engine arrangement includes a gear reduction mechanism having at least three separate and rotatable junction elements, the rotation speeds of the junction elements being interdependent but not having a fixed ratio the ones relative to the others, and wherein, in the mounted position, among the junction elements, a first junction element is connected to an engine crankshaft, a second junction element is connected to an accessory pulley which is drivingly connected to an electric machine and at least one accessory, and a third junction element. A free wheel is connected to a non-rotating part of the engine arrangement in the mounted position, and the third junction element is configured to be coupled to the free wheel in a first operating phase of the drive system. The third junction element is further configured to be coupled to the engine crankshaft in a second operating phase.

A drive system is provided for an engine arrangement, which includes a gear reduction mechanism such as an epicyclic gearing including first junction element connected to an engine crankshaft, second junction element connected to an accessory pulley which is drivingly connected to an electric machine and at least one accessory, and third junction element. A free wheel is connected to a non-rotating part of the engine arrangement. In a first operating phase of the drive system, the free wheel is coupled to the third junction element and is configured such that when the third junction element exerts torque on the free wheel in one direction, the free wheel is in an engaged state and stops the rotation of the third junction element, and, when the third junction element exerts torque on the free wheel in the opposite direction, the free wheel is in a free state and allows rotation of the third junction element.

A starter assembly includes a partial planetary gear set connected to a pinion gear slidable along a first axis. The starter also includes a motor casing housing a brushless electric motor and having a first bearing. The motor includes multi-phase stator and rotor assemblies arranged inside the casing concentrically relative to the first axis. The rotor assembly has a rotor with a shaft supported by the first bearing and connected to a sun gear engaging the gear set, and a rotor position and speed sensor target. The starter additionally includes a motor end-cap for mating with and enclosing the motor casing and having a second bearing supporting the shaft. The starter also includes an electronics cover with a power connector for mating with the end-cap and housing an electronic commutator assembly. The commutator assembly includes power electronics, and control processor electronics arranged between the end-cap and the power electronics.