Patent ID: 8714124

Claim:
A cover structure for an internal combustion engine, comprising: a timing train mechanism provided on one sidewall of a main body of the internal combustion engine; and a cover member for covering the timing train mechanism, a timing train chamber is formed between the cover member and the main body of the internal combustion engine, wherein the cover member comprises: side fastening portions that are provided at a pair of side marginal portions separated from each other and fastened to the main body of the internal combustion engine; a protrusion portion that protrudes from an inner surface of a wall portion connecting the pair of side marginal portions toward the main body of the internal combustion engine and has a lubricating oil remaining part where lubricating oil for lubricating the timing train mechanism remains; and a first rib that protrudes from the inner surface of the wall portion toward the main body of the internal combustion engine and is provided upper in a cylinder axial direction than at least the lubricating oil remaining part, and wherein a part of the first rib is downward inclined toward either one of the pair of side marginal portions to cover the lubricating oil remaining part, and extends in a side direction beyond the protrusion portion and the lubricating oil remaining part.