| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine capable of changing a temperature of intake air flowing into a combustion chamber with high responsiveness.SOLUTION: In an internal combustion engine including a low temperature cooling water circulation system for circulating cooling water at low temperature, and a high temperature cooling water circulation system for circulating cooling water at high temperature, a low temperature cooling water flow channel for circulating the cooling water at low temperature, includes a water jacket covering at least a part of a wall surface of an intake port. The intake port has a cooling water surface covered by the water jacket and a non-cooling wall surface not covered by the water jacket. An airflow control valve constituted to be able to change a ratio of a flow rate of intake air flowing at a side of the cooling wall surface and a flow rate of intake air flowing at a side of the non-cooling wall surface is disposed at an intake upstream side of the cooling wall surface. The airflow control valve is preferably constituted as a tumble control valve (TCV).SELECTED DRAWING: Figure 2 |
