| 摘要 |
PURPOSE:To enhance accuracy in a low opening region, by using a throttle valve opening sensor, whose output increases larger as a throttle valve opening decreases smaller, and controlling the throttle valve opening in the low opening region, in the case of an engine whose basic fuel injection quantity is calculated on the basis of the throttle valve opening and a speed of the engine. CONSTITUTION:A microprocessor 13 calculates intake amount of air/engine speed, for calculating the basic fuel injection quantity, on the basis of a detection value from a throttle valve opening sensor 5 and a crank angle sensor 12. The throttle valve opening sensor 5 has the characteristic such that its output increases larger as a throttle valve opening decreases smaller, being formed so as to enhance accuracy in a low opening region. Further the throttle valve opening sensor 5, in which a variable resistor is connected in series and in parallel with a sliding resistor, corrects a mounting error and unevenness of the characteristic. While the microprocessor 13 controls an engine speed in the idle time through an actuator 6, reducing a change of the engine speed.
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