| 摘要 |
PROBLEM TO BE SOLVED: To supply cooling water at a suitable temperature to each portion of an internal combustion engine while reducing the number of pumps and radiators. ! SOLUTION: A cooling device 5 of an internal combustion engine includes: one cooling water pump 53; one radiator 513 for radiating heat of cooling water; a first cooling water passage 51 having flow control valves 511 and 512 on an inlet side and an outlet side respectively and passing through a cylinder block 61, the radiator 513, and a portion 515 in the vicinity of an exhaust port in a cylinder head; a second cooling water passage 52 having flow control valves 521 and 522 on an inlet side and an outlet side respectively and passing through a heater 523 and a portion 524 in the vicinity of an intake port in the cylinder head; a heat exchanger 54 for exchanging heat between cooling water in the second cooling water passage 52 and the cooling water in the first cooling water passage 51; and a change-over valve 525 for switching between |
