Patent ID: 9587719
Date: 2017-03-07
CPC Classifications: F01L,F01M,F16H

Claim:
1. An internal combustion engine comprising: a cylinder body including a cylinder therein; a cylinder head joined to the cylinder body; a cam chain chamber provided in the cylinder body and the cylinder head, and configured to accommodate a cam chain and a chain guide configured to guide the cam chain; a chain tensioner provided in the cam chain chamber, and including a case main body, a plunger sliding in the case main body, a spring biasing the chain guide against the cam chain via the plunger, interlocking teeth located on a surface of the plunger, and an engaging portion engaged with the interlocking teeth and configured to inhibit the plunger from moving in a direction away from the chain guide; and an oil supply passage provided in an inner wall of at least one of the cylinder head and the cylinder body, and configured to supply oil to the chain tensioner; wherein the oil supply passage is in communication with the cam chain chamber at a location above the chain tensioner so as to supply the oil from within the cam chain chamber to the chain tensioner.