| 摘要 |
PROBLEM TO BE SOLVED: To raise the temperature of an after-treatment apparatus for exhaust gas according to the required speed. SOLUTION: The after-treatment apparatus for exhaust gas is disposed inside an engine exhaust passage. To raise the temperature of the after-treatment apparatus for exhaust gas, three of a first injection pattern which injects only main fuel and phase-lags the injection timing of a main fuel QR, a second injection pattern which injects auxiliary fuel QV around intake top dead center and phase-lags the injection timing of the main fuel QR, and a third injection pattern which injects auxiliary fuels QV and QP respectively before and after the injection of the main fuel and phase-lags the injection timing of the main fuel QR are used selectively. |
