| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device capable of reducing both noise level and smoke generation level of an internal combustion engine. SOLUTION: The fuel injection control device M comprises a fuel injection valve 2 injecting fuel into a cylinder of the engine 1 when an exciting coil 8 receives a driving pulse, a common rail 11 supplying the fuel to the fuel injection valve 2, a controller 13 making the fuel injection valve 2 perform precedence fuel injection Dp before main fuel injection Dm by applying a driving pulse Tp for the precedence fuel injection and a driving pulse Tm for the main fuel injection to the fuel injection valve 2 at a non-pulse interval Tpm. The non-pulse interval Tpm is set at a value corresponding to a region where characteristics of the noise level and the smoke generation lever of the engine 1 decrease together after they are inclined to increase and reach a peak according to reduction of the non-pulse interval. COPYRIGHT: (C)2005,JPO&NCIPI
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