| 摘要 |
PROBLEM TO BE SOLVED: To improve lubricating performance of a timing chain of an engine, in a lubricating structure of the timing chain.SOLUTION: A cylinder head (3) is provided with a chain lubricant passage (31) for supplying a lubricant flowing into a head bolt insertion hole (27) from a bearing face (24) of a bearing portion (22), to a timing chain (13). The chain lubricant passage (31) includes an oil inlet (33) formed on an inner peripheral face of a side wall (32) of the head bolt insertion hole (27), an oil outlet (34) formed on an outer peripheral face of the side wall (32) of the head bolt insertion hole (27) while facing the timing chain (13), and a supply oil passage (35) penetrating through the side wall (32) of the head bolt insertion hole (27) to communicate between the oil inlet (33) and the oil outlet (34). |
