| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cylinder block cooling structure that can properly cool a bore wall according to an engine warmup state. <P>SOLUTION: The cylinder block cooling structure 1 includes a groove 11 formed between the bore 13 and a water jacket 14 out of a cylinder block 10A of an engine, and a high heat conduction material 12 provided in the groove 11. The high heat conduction material has a coefficient of linear expansion higher than that of a base material of the cylinder block 10A and is provided in a contactless state with a wall surface of the groove 11 so that the heat conduction material 12 contacts with the wall surface of the groove 11 when a temperature of a coolant circulating into the water jacket 14 is higher than a predetermined value α. Moreover, the high heat conduction material 12 has thermal conductivity higher than that of the base material of the cylinder block 10A. <P>COPYRIGHT: (C)2012,JPO&INPIT |
