Lubricating oil feeding apparatus and oil feeding structure for

Internal-combustion engines – Starting device – Having specific mounting or drive connection for electric...

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12317929, 123196R, 184 5, 184 63, F01M 106

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054958334

ABSTRACT:
A lubricating oil feeding apparatus of an internal combustion engine can adjust an amount of oil fed to each bearing and provides for a reduced number of parts for a shaft portion structure of a starter driven gear. In the engine, a balancer shaft is synchronously rotated with a crankshaft. The crankshaft and the balancer shaft are rotatably supported on a split surface of a crankcase by plain bearings. Parallel oil passages communicate with oil holes provided in the plain bearings for exclusively feeding lubricating oil to at least the crankshaft and the balancer shaft. The opening areas of the oil holes provided in the plain bearings of the balancer shaft are smaller than the oil holes provided in the plain bearings of the crankshaft. An outer portion of a starter one-way clutch can also be integrally fitted on a rotor. A driven gear of the starter is connected to a starter drive gear of a starter motor by intermediate gears. The diameter D.sub.b of a starter driven gear bearing portion of the crankshaft is the same as the diameter D.sub.a of a supporting portion of the crankshaft. A starter driven gear of the starter one-way clutch is fitted to the starter driven gear bearing portion of the crankshaft by a slide bearing to be freely rotated relative to the starter driven gear bearing portion. A lead groove is provided on the inner surface of the bearing for positively feeding oil to the receiving surface of the slide bearing.

REFERENCES:
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patent: 4930467 (1990-06-01), Masuda et al.
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patent: 4995275 (1991-02-01), Okamoto et al.
patent: 5010858 (1991-04-01), Schierling et al.
patent: 5367913 (1994-11-01), Yumiyama et al.

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