Patent ID: 9422835
Filing Date: 2016-08-23
CPC Classification: F01L,F02B

Claim Text:
1. In an engine having a crankcase and a crankshaft provided in the crankcase, and having a valve train system and an idle gear that transmits power from the crankshaft to the valve train system, the engine further having an idle shaft that is provided in parallel to the crankshaft and which rotatably supports the idle gear thereon, and a case cover that covers a portion of the crankcase, the improvement comprising a valve train system drive device comprising: a crankcase-side boss part formed on a wall of the crankcase for supporting a first end of the idle shaft; a case-cover-side boss part formed inside the case cover for supporting a second end of the idle shaft; wherein joint parts, that are configured to selectively engage with each other, are formed at the case-cover-side boss part and at the second end of the idle shaft, respectively, and wherein engagement of the joint parts with each other precludes the idle shaft from rotating.