starters for internal combustion engines

Abstract

The invention relates to a starter (1) for an internal combustion engine (2), comprising: a support (4), an electric motor (5) arranged on said support (4) and intended to drive a pinion ( 7) Rotation, and a solenoid drive (6) arranged on said support (4) and used for said pinion (7) between active position (AS) and passive position (PS) axial adjustment, said active position (AS) is arranged for the drive of the gear (3) of said internal combustion engine (2), said passive position (PS) is axially offset relative to said active position (AS), Wherein, the solenoid driver (6) has a plunger stopper (20), a plunger (21) and a cylindrical coil device (22), and the plunger stopper (20) is relatively The support (4) is fixed, the plunger (21) can be adjusted axially relative to the plunger stopper (20), and the coil device (22) is arranged on the plunger stopper ( 20) on and circumferentially around the cylindrical coil interior (25) of the coil device (22), wherein the coil interior (25) extends axially from the proximal end of the coil device (22) (62) extending towards the distal end (63) of the coil device (22), wherein the plunger stopper (20) has a cylindrical portion (27) extending from the The distal portion (63) protrudes axially into the coil interior (25), and wherein the plunger (21) is aligned with the cylindrical portion (27) of the plunger stopper (20) are arranged axially opposite and protrude axially from the proximal end portion (62) into the coil interior (25) of the coil arrangement (22) in the active position (AS) of the pinion (7). By extending the cylindrical portion (27) of the plunger stop (20) into the coil interior (25) so that the face end (33) of the cylindrical portion (27) is in the region of the proximal portion (62), it is possible to Reduced wear of the pinion (7) and / or gear (3) is achieved.

Description

technical field [0001] The invention relates to a starter for an internal combustion engine, which has the features of the preamble of claim 1 . Background technique [0002] A starter of the described type comprises a support, an electric motor arranged on the support and intended to drive the pinion in rotation, and an electric motor arranged on the support for the pinion in active and passive positions. ), the active position is provided for the drive of the gear of the internal combustion engine, and the passive position is axially offset relative to the active position. A solenoid driver comprising a plunger stop fixed relative to a support, a plunger axially adjustable relative to the plunger stop, and a cylinder arranged on the plunger stop and surrounding the coil arrangement in a circumferential direction A cylindrical coil assembly inside a circular coil. Furthermore, the plunger stopper has a cylindrical portion protruding into the inside of the coil in the axia...

AI Technical Summary

Problems solved by technology

Also, the annular groove is retained and causes the field lines in the plunger to deflect even when the plunger has been retracted inside the coil, thus reducing the available magnetic force

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