| 摘要 |
PROBLEM TO BE SOLVED: To reduce size and cost of a cooling water distribution device in an internal combustion engine in which cooling of a cylinder block is not performed during a warm-up operation by having separate cooling systems for the cylinder block and cylinder head.SOLUTION: A cooling water distribution device 14 includes a housing 21 fixed at a cylinder head 2, and a first inlet port 22 and a second inlet port 23 opened toward a cylinder block 1 are provided at the housing 21. At the cylinder head 2, a first discharge passage 19 communicating with the first inlet port 22 is formed, and cooling water which has cooled the cylinder block 1 reaches a first communication chamber 24 from the first discharge passage 19 via a first thermo valve 36. At the housing 21, a second thermo valve 37 for controlling water conduction to a radiator is arranged concentrically with the first thermo valve 36. |
