| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling system for an internal combustion engine that comprises a supercharge engine cooler using engine cooling water as a cooling medium in a passage between two-stage supercharge systems and that can achieve high supercharging of intake gas irrespective of restriction conditions on the outlet temperature of a high-pressure stage compressor of a high-pressure stage supercharger and also suppress deterioration in engine performance of fuel and the like, an internal combustion engine and a cooling method for the internal combustion engine.SOLUTION: A supercharge engine cooler 17 using engine cooling water W as a cooling medium is disposed in an intake passage 12 between a low-pressure stage compressor 15b and a high-pressure stage compressor 16b of two-stage supercharge systems. A control valve 32 is disposed in a flow passage of the engine cooling water W which flows into the supercharge engine cooler 17, and an opening/closing state of the control valve 32 is controlled according to an outlet gas temperature Tlo which is an outlet temperature of an intake gas A of the low-pressure stage compressor 15b, a cooling water temperature Tw which is a temperature of the engine cooling water W, and an operation state of an engine 10.SELECTED DRAWING: Figure 3 |
