Patent ID: 6536400
Filing Date: 2003-03-25
Classification: F01M,Y10T

Abstract:
A lubricating structure for an internal combustion engine including an oil supply passage for supplying oil from an oil pump to portions to be lubricated and a relief valve which is opened for relieving part of the oil into a relief passage when the pressure in said oil supply passage exceeds a specific value comprising:said relief valve is interposed in said oil supply passage, and said relief valve internally includes a passage for supplying oil from one oil supply passage to another oil supply passage; said relief valve being provided in an oil supply passage passing through a portion near a power transmission member in said internal combustion engine; said power transmission member being a cam chain hung between a crank shaft and a cam shaft in said internal combustion engine, and said relief valve is mounted to cross a cam chain chamber for containing said cam chain; said relief passage being directed in a direction of the cam chain, a cam shaft drive gear or a main shaft drive gear.