Patent ID: 6467459
Filing Date: 2002-10-22
Classification: F02D

Abstract:
A fuel injection control apparatus having a throttle sensor and an intake passage negative pressure sensor, for calculating a basic injection quantity of fuel from a throttle opening or a negative pressure detected by the sensor and an engine rotational speed comprising:first calculating means for calculating a basic injection quantity using the throttle opening and the engine rotational speed; second calculating means for calculating a basic injection quantity using the negative pressure and the engine rotational speed; means for comparing a rate of increase of the throttle opening with a reference value; means for detecting a load; selecting means for selecting said first calculating means when the load is high and selecting said second calculating means when the load is low; and switching means for setting said selecting means to select said first calculating means regardless of the selection made by said selecting means if the load is low and the rate of increase of the throttle opening is greater than said reference value.