| 摘要 |
PROBLEM TO BE SOLVED: To prevent pressure drop of lubricating oil supply in a valve system and secure sufficient lubricating oil supply quantity in the valve system for improvement of lubrication efficiency by providing a lubricating oil supply passage exclusive for valve system not passing through an oil gallery. SOLUTION: A feed pump Pf rotating together with a crankshaft 1 is provided on a left end of the crankshaft 1 indicated in a figure. Lubricating oil supplied from the feed pump Pf passes through an oil cooler 11 and an oil filter 12, and one part of lubricating oil is supplied to the oil gallery F5 through a lubricating oil supply passage to the oil gallery F5 and is supplied to a journal part 1g, a crank pin part 1a and the like of the crankshaft 1 from the oil gallery F5. Another part of lubricating oil is supplied to the valve system 4 through lubricating oil supply passages F10, F11 exclusive for the valve system 4. COPYRIGHT: (C)2005,JPO&NCIPI
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