PURPOSE: To enable selection of timely injection corresponding to the driving situation, by reading fuel injection timing corresponding to the detected driving condition from the stored memory and feedback-controlling it by the valve calculated from the read value.

CONSTITUTION: An engine rotation frequency sensor 64, an operating transformer type spill ring displacement sensor 66, a pressure sensor 70, a combustion chamber wall temperature sensor 72 an intake air pressure sensor 76, an intake air temperature sensor 77 and a disphragm displacement sensor 78 are connected to a input section 55 of a computer 54. And fuel injection timing, which is mapped in memory 59 in the form of the pump chamber pressure corresponding to the driving condition, and the pump chamber pressure corrected valve which is mapped similarly in a memory 61 are operated in an operation part 57 in reference to the driving condition obtained from sensors. Then a fuel bleed valve 80 is controlled so that at matches 80 the pump chamber inner pressure corresponding to optimum fuel injection timing.