| 摘要 |
Approximately U-letter-shaped oil groove 42 is formed by casting on the surface 35a of the pedestal 35, the depth of the groove is deeper than the surface of the cylinder block 2, one leg of the U-letter shaped groove 42 is formed as a reservation chamber 44 and the other leg of the groove 42 is in communication with an oil passage 36 provided in the cylinder block 2, and the driving part block 8 of the chain adjuster 5 is coupled to the surface 35a of the pedestal 35 in such a manner as the oil hole 39 of the driving part block 8 is aligned with the oil reservation chamber 44. When the internal combustion engine starts, the oil flows into the reservation chamber over the partition wall to supply the oil to the chain adjuster. When the engine stopped, since the oil is deposited in the oil reservation chamber 44, it can be used instantly at the time of re-starting of the engine.
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