| 摘要 |
PROBLEM TO BE SOLVED: To avoid the temporary deterioration in HC just after starting of the low exhaust gas temperature, by realizing early activation of a catalyst and HC reduction by after burning by a large ignition timing delay of the ignition timing. SOLUTION: In a cold start of an internal combustion engine for requiring an early temperature rise in a catalytic converter, the ignition timing is set after the compression upper dead center, and super retard combustion C for injecting fuel before the ignition timing and after the compression upper dead center is performed. Turbulence in a cylinder is improved by high pressure fuel injection just before the ignition timing, and since propagation of a flame is promoted, stable combustion can be realized. While, since an HC generating quantity is increased to the contrary in a little period just after starting of the low cylinder temperature, a phase A is performed after starting, and is successively transferred to the super retard combustion C via a temperature rising phase B. COPYRIGHT: (C)2006,JPO&NCIPI
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