Patent ID: 6481405
Filing Date: 2002-11-19
Classification: F02D

Abstract:
A fuel supply control system for an internal combustion engine comprising:startup fuel amount calculating means for calculating, during startup of the engine, a fuel amount to be supplied to the engine according to a start fuel amount calculating method; after-startup fuel amount calculating means for calculating, after startup of the engine, a fuel amount to be supplied to the engine according to an after-startup fuel amount calculating method; and fuel supply means for supplying the fuel amount calculated by said startup fuel amount calculating means to said engine during startup of said engine, and supplying the fuel amount calculated by said after-startup fuel amount calculating means to said engine after startup of said engine; wherein said fuel supply means includes transition control means for smoothly performing a transition from the fuel amount calculated by said startup fuel amount calculating means to the fuel amount calculated by said after-startup fuel amount calculating means, and said transition control means smoothly performs said transition by correcting each of the fuel amount calculated by said startup fuel amount calculating means and the fuel amount calculated by said after-startup fuel amount calculating means, using a transition coefficient, the transition coefficient varying with elapsed time, and the transition coefficient being set according to the temperature of said engine, and the fuel supply control system includes an intake pipe wherein fuel is supplied to said engine through said intake pipe and wherein said startup fuel amount calculating means and said after-startup fuel amount calculating means respectively include startup adhesion correcting means and after-startup adhesion correcting means for correcting for a delay in the transfer of fuel due to adhesion of a portion of the supplied fuel to an inner wall of said intake pipe said startup adhesion correcting means correcting the fuel amount using startup adhesion correction parameters and said after-startup adhesion correcting means correcting the fuel amount using after-startup adhesion correction parameters, set independently from the startup adhesion correction parameters, said transition control means correcting the startup adhesion correction parameters and the after-startup adhesion correction parameters using a transition coefficient varying with elapsed time thereby smoothly performing the transition from the startup adhesion correction parameters to the after-startup adhesion correction parameters.