| 摘要 |
PROBLEM TO BE SOLVED: To configure an oil hole 15 provided in a crankshaft 2 suitable for inspecting failure to incorporate a set of two radial bearings 7-10 of a halved shape to be incorporated on an outer diameter side of a crank journal 2s and on an outer diameter side of a crank pin 2b. SOLUTION: The oil hole 15 of a linear shape provided in the crankshaft 2 is formed in such an attitude that at a predetermined crank angle, a journal side opening (introduction port) 15a of the oil hole 15 is situated in an inner diameter groove 7a of the upper radial bearing 7 and a crank pin side opening (discharge port) 15b of the oil hole 15 is situated in an inner diameter groove 9a of the upper radial bearing 9. COPYRIGHT: (C)2010,JPO&INPIT
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