PURPOSE: To perform an accurate compensation in time of acceleration without using any linear type throttle sensor, by detecting a secondary differentiation pertaining to pressure in a suction pipe or time for a suction air flow rate, while increasing a synchronous fuel injection quantity on the basis of this secondary differentiation.
CONSTITUTION: An electronic controller 38 is inputted with detection values out of an idle switch 11, a suction pipe pressure sensor 29, a cylinder discrimination switch 32, a rotation angle sensor 33, etc., and controls the valve opening time of a fuel injection valve 13. The electronic controller 38 samples a detection value P of the suction pipe pressure sensor 12 at every specified time, then calculates a difference ΔP between the detection value of this time and that of two times before, and performs the first unsynchronous, accelerating fuel injection when the difference between the value ΔP of this time and that of two times before exceeds a value A. Then, a difference ΔΔP between the value ΔP of this time and that of the last time exceeds a value B, the synchronous fuel injection quantity is compensated according to the value ΔΔP, together with the unsynchronous, accelerating fuel injection in the hereafter.
ITOU TOSHIMITSU
NOROTA KAZUHIKO
| JPS5939938A | 1984-03-05 | |||
| JPS57137631A | 1982-08-25 |
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