INTERNAL COMBUSTION ENGINE STARTUP TORQUE TRANSFER MECHANISM

摘要

A construction width region (Aowc) of a one-way clutch (14) overlaps with a mesh width region (Agg) where torque is transferred from a pinion (20) to a ring gear (12) at the time of startup of the engine, so that the center positions of the two regions in the direction of the rotation axis coincide with each other. Due to this overlap, the reaction force that occurs on a one-way clutch (14) when torque is transferred from the pinion (20) to the ring gear (12) can be sufficiently restrained from becoming, together with the torque, a force that inclines the rotation axis of the ring gear (12). Therefore, it is possible to restrain the direction of engagement force from lilting from a nopnal position relative to a sprag or the like of the one-way clutch (14), and to sufficiently prevent occurrence of bad engagement. Furthermore, damages, such as impressions inside a bearing (18) and the like, and deformations of oil seal portions (24, 26) can be prevented.