| 摘要 |
A method and apparatus for controlling the fuel injection timing of a compression ignition engine are featured by dithering the fuel injection timing so as to be advanced and retarded with respect to and in the vicinity of a calculated timing of injection of pressurized fuel supplied to the engine which calculated injection timing is determined in accordance with operating conditions of the engine, operating the engine alternately at the calculated fuel injection timing, the advanced fuel injection timing and the retarded fuel injection timing each during a given period of time, deciding a direction of improving a fuel consumption rate of the engine from corresponding changes of an operating condition of the engine detected when the engine is operated at the respective fuel injection timings, and correcting the calculated fuel injection timing in accordance with the result of the decision, thereby controlling the fuel injection timing at an optimum fuel injection timing which ensures an optimum fuel consumption rate.
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