| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine capable of improving a cooling performance of oil.SOLUTION: A cooling water introduction port 225 for introducing some of cooling water flowing through a block side water jacket 221 is provided to a cylinder block 22 having a block side oil passage 222a for recovering oil flowing down from a head side oil passage formed on a cylinder head immediately below the block side oil passage 222a. Thereby, heat exchange between the cooling water introduced from the block side water jacket 221 and flowing through a cooling water introduction passage 227 and the cooling water introduction port 225 and the oil flowing through the block side oil passage 222a is promoted, so as to improve a cooling performance of the oil. |
