| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine profitable for cooling intake air in an in-cylinder combustion chamber even if fuel injection quantity is low and capable of improving intake air charging efficiency and anti-knocking performance. SOLUTION: In the control device for the internal combustion engine provided with a cylinder injection valve injecting fuel to the in-cylinder combustion chamber, an injection ratio control means reducing injection ratio of fuel injection as compared with a case that an engine operation condition is in a predetermined second area other than a first area when the engine operation condition is in the predetermined first area in which cooling of intake air in the in-cylinder combustion chamber by fuel is necessary is provided. As injection ratio is reduced, injection period can be extended and that is profitable for cooling intake air in the in-cylinder combustion chamber. Temperature rise of intake air which is cooled once by receiving heat or the like from an inner wall of the combustion chamber is inhibited. Consequently, intake air charging efficiency and anti-knocking performance can be improved even if fuel injection quantity is low. COPYRIGHT: (C)2007,JPO&INPIT
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