| 摘要 |
PROBLEM TO BE SOLVED: To provide a partition member that vertically divides inside a water jacket of an internal combustion engine cylinder block, for being precisely arranged at a desirable position, and closely contacting an edge of the member to an inner wall of the water jacket. SOLUTION: A spacer 4 contacts a bottom surface 10b of the water jacket 10 so that a vertical position of the flow passage partition member 6 is precisely determined. A size in a width direction of the flow passage partition member 6 is reduced by elastic deformation when inserted into the water jacket 10 so that the flow passage partition member 6 can be arranged in the water jacket 10. After arranged, the flow passage partition member 6 can closely contact the inner wall of the water jacket 10 in the width direction by an elastic restoring force thereof. Upward shifting of the water jacket 10 is prevented by the close contact. As the problem is solved in this way, cooling water above and below the flow passage partition member 6 is prevented from being easily exchanged, thereby sufficiently effecting cooling of the cooling water with different flow rates in the vertically-divided sections above and below the flow passage partition member 6, and effectively decreasing a temperature difference of a cylinder bore portions 12 in the vertical direction. COPYRIGHT: (C)2008,JPO&INPIT |
