Patent Document ID: 20030089357
Application ID: 10290394
Patent Flag: 0

Claim One:
1. A fuel supply control system for an internal combustion engine, comprising: intake air flow rate detecting means for detecting an intake air flow rate of said engine; basic fuel amount calculating means for calculating a basic fuel amount supplied to said engine according to the intake air flow rate detected by said intake air flow rate detecting means; an air-fuel ratio detecting means for detecting an air-fuel ratio provided in an exhaust system of said engine; air-fuel ratio correction coefficient calculating means for calculating an air-fuel ratio correction coefficient for correcting an amount of fuel to be supplied to said engine so that the air-fuel ratio detected by said air-fuel ratio detecting means coincides with a target air-fuel ratio; correlation parameter calculating means for calculating at least one correlation parameter vector which defines a correlation between the air-fuel ratio correction coefficient and the intake air flow rate detected by said intake air flow rate detecting means, using a sequential statistical processing algorithm; learning means for calculating a learning correction coefficient relating to a change in characteristics of said intake air flow rate detecting means, using the at least one correlation parameter vector; and fuel amount control means for controlling an amount of fuel to be supplied to said engine using the basic fuel amount, the air-fuel ratio correction coefficient, and the learning correction coefficient.