| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling structure for a cylinder block, capable of equally cooling. SOLUTION: This cooling water structure for a cylinder block is provided with the cylinder block 10 comprising a water jacket part 12 continuously provided around a bore wall 11b enclosing a plurality of bore ranges, and a water jacket spacer 20 inserted into the water jacket part 12. Cooling water 100W is supplied as cooling medium to the water jacket part 12, so that temperature of the bore wall 11b is equalized. In the cylinder block 10, an inter-bore range 10b positioned close to boundaries of adjoining bore ranges, and a drilled path 11d as a passage to send cooling water 100W positioned close to the inter-bore range 10b to the other range are provided. The cooling structure 1 for a cylinder block is also provided with a cut 20k as a flow promoting means to increase flow of cooling water 100W flowing in the drilled path 11d. COPYRIGHT: (C)2006,JPO&NCIPI
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