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US 7,900,529 B2Granted
Startup torque transmitting mechanism of an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTomoaki Suzuki, Toshiaki Asada, Makoto Ishikawa, Toshimitsu Shiba, Kazuhito Sakai
Life of this patent
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Abstract
An outer race support plate to which torque of a pinion gear is transmitted from a ring gear via a one-way clutch and thus rotates a crankshaft is provided separately from a flywheel and is mounted to the crankshaft not via the flywheel. As a result, impact noise produced when the one-way clutch engages is not directly transmitted to the flywheel. Accordingly, noise radiation from the flywheel can be suppressed, thereby enabling noise to be reduced.
Claims11
A startup torque transmitting mechanism of an internal combustion engine, comprising:
- a one-way clutch which both transmits torque generated by a starter motor to a crankshaft side in one direction and prevents the transmission of torque in the other direction;
- a race connecting member which is provided separately from a flywheel or a drive plate, is mounted to the crankshaft side, not via the flywheel or the drive plate, so as to rotate in conjunction with a crankshaft, and is connected to one race of the one-way clutch, the race connecting member is fastened to a crankshaft end surface while being sandwiched between the crankshaft end surface and the flywheel or the drive plate;
- and
- a ring gear which rotates upon receiving torque from the starter motor and is connected to another race of the one-way clutch, and a first load relieving portion which prevents deformation of the race connecting member that occurs due to pressure from the flywheel side or the drive plate side is formed on a flat surface side of the race connecting member on which the flywheel or the drive plate is arranged, wherein the first load relieving portion is formed as a separated surface region in which a surface of the race connecting member is separated from the flywheel or the drive plate.
1 more element
Dependencies are inferred from the claim text.