| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronically controlled fuel injection device for a separate intake type four-cycle internal combustion engine, capable of restricting the influence of the noise when detecting the intake air pressure and capable of detecting the intake air pressure, atmospheric pressure and an intake stroke by a single sensor. SOLUTION: Two systems of signal path 24 and 25 for dividing the intake air pressure signal from an intake air pressure sensor 10 into two for inputting the signal to a control unit 19 are provided, and the one signal path directly inputs the intake air pressure signal to the control unit, and the other signal path inputs the intake air pressure signal to the control unit via a low-pass filter 26, having a large time constant. The control unit detects the atmospheric pressure and determines the stroke, on the basis of the intake air pressure signal inputted via the one signal path, and detects the intake air pressure on the basis of the intake air pressure signal input via the other signal paths.
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