Cam bearing lubrication structure for internal combustion engine
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United States of America Patent
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Feb 14, 2017
Grant Date -
Apr 2, 2015
app pub date -
Sep 11, 2014
filing date -
Sep 27, 2013
priority date (Note) -
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Abstract
A cam bearing lubrication structure for an internal combustion engine includes a cylinder head having a cam bearing region, a plug hole for an ignition plug and a plug tube fitted liquid-tight therein. The cam bearing lubrication structure includes an outer periphery oil path bypassing along an outer peripheral face of the plug tube, a main lubricating oil passage extending through the plug hole and formed to connect to the outer periphery oil path and a guide passage formed in and through the cam bearing region to connect a sliding face of the cam bearing region from the outer periphery oil path and supplying lubricating oil to a sliding face of the cam bearing region and a camshaft. In addition, a lubricating oil supplying structure is provided for a valve apparatus for further increasing the oil supply amount to achieve a further increase in the speed of the engine.
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