| 摘要 |
PURPOSE:To previously prevent the generation of knocking by judging the deterioration of an ignition timing sensor when the peak value of the ignition signal of the sensor output is less than a judgment value and open-loop- controlling the injection timing according to the fundamental injection timing when deterioration is judged. CONSTITUTION:When the feedback conditions for fuel injection timing are fulfilled, aimed ignition timing is calculated on the basis of each output signal of a revolution speed sensor (not shown in the figure) and an acceleration position sensor 20 is an ECU56. Then the deviation between the aimed ignition timing and the actual ignition timing obtained from the output of an ignition timing sensor 38 is calculated, and the fundamental injection timing calculated beforehand is corrected according to the deviation, and the timer mechanism of an injection pump is controlled according to the corrected injection timing. In the above, the peak value of the ignition signal of the ignition timing sensor 38 is maintained, and when the peak value is less than a judgment value, the injection timing is open-loop-controlled according to the above-described fundamental injection timing.
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