Patent ID: 6672284
Filing Date: 2004-01-06
Classification: F02D

Abstract:
An internal combustion engine fuel supply amount control apparatus comprising:load detection means for detecting a load on an internal combustion engine; air-fuel ratio estimation means for estimating an air-fuel ratio of the internal combustion engine during a predetermined period based on the load on the internal combustion engine detected by the load detection means; fuel injection amount control means for controlling a fuel injection amount based on the air-fuel ratio estimated by the air-fuel ratio estimation means: wherein the load detection means includes rotation speed detection means for detecting a rotation speed of the internal combustion engine as the load on the internal combustion engine; variation amount calculation means for calculating a rotation speed variation amount based on the rotation speed detected by the rotation speed detection means; and average value calculation means for calculating a rotation speed average value based on the rotation speed during the predetermined period detected by the rotation speed detection means, wherein the air-fuel ratio estimation means estimates the air-fuel ratio of the internal combustion engine based on the rotation speed variation amount calculated by the variation amount calculation means and the rotation speed average value calculated by the average value calculation means.