| 摘要 |
PURPOSE:To improve cooling efficiency with a simple construction while securing a sufficient capacity of a water jacket by providing a separate-body partition board which projects out inside said water jacket, in the connecting part between the inlet/outlet port of a circulating water passage and said water jacket. CONSTITUTION:Cooling water is introduced from the water inlet passage 2 of a flange 1, restrained by a partition board 5 which partitions between the water inlet passage 2 and a water outlet passage 3, and a water jacket peripheral wall 16, and is made flow to the deeper part of a water jacket 7. Then, the cooling water flows along the peripheral wall on the deeper part of the water jacket 7 and, after flowing along the partition board 5 and an oil jacket peripheral wall 15, it is discharged out of the water outlet passage 3. Thereby, since the flow of the cooling water in the water jacket 7 is restrained by the partition board 5 and made flow along the peripheral wall, the oil jacket peripheral wall 15 can be effectively cooled. Also, the whole center housing can be effectively cooled.
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