| 摘要 |
PROBLEM TO BE SOLVED: To optimally adjust the combustion of an internal combustion engine according to a working state. SOLUTION: Fuel injecting valves 10a to 10d are provided in a combustion chamber of an internal combustion engine 1, which carry out main fuel injection and auxiliary fuel injection before the main fuel injection. An electronic control unit (ECU) 30 sets up auxiliary fuel injection timing so as to make a delay in ignition of fuel of the auxiliary injection amount in practically working equal to a delay in ignition in an engine normal working state, and sets up the maximum fuel amount in a range where combustion can be finished between the auxiliary injection timing and main injection timing as the auxiliary injection amount. Therefore, the fuel of the auxiliary injection is completely burned by a start of the main injection, so that a combustion state of the fuel of the main injection is improved, and the generation of exhaust white fumes and the like is prevented.
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