| 摘要 |
A fuel injection control apparatus for a diesel engine (1) is provided that eliminates a torque step occurring when shifting from a pilot fuel injection mode to a normal injection mode. After finding a total fuel injection quantity QFIN per cycle (block 101), a pilot fuel injection quantity QPILOTB is subtracted therefrom to determine a pilot fuel injection quantity QPILOT and a main fuel injection quantity QMAIN (block 103). Corrected pilot fuel injection quantity QPILOTF and corrected main fuel injection quantity QMAINF are determined using a fuel temperature correction coefficient KQTHF and a pilot fuel injection thermal efficiency CEHPILOT (block 104) and a main fuel injection thermal efficiency CEHMAIN (block 105). The thermal efficiencies are established based on the respective injection timings. A change in torque does not occur because the change in the thermal efficiency caused by the injection timing is offset.
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