Patent ID: 6041758
Filing Date: 2000-03-28
Classification: F02D,Y02T

Abstract:
A fuel injection amount controller for engines comprising:an operation condition detection means for detecting the operation conditions of an engine inclusive of an intake pipe pressure and a crank angle;an air-to-fuel ratio control means for controlling the air-to-fuel ratio of said engine into a lean air-to-fuel ratio more lean than a stoichiometric air-to-fuel ratio when said operation conditions represent a predetermined operation condition;a pressure deviation calculation means for calculating a pressure deviation in said intake pipe pressure within a predetermined period of time or between predetermined crank angles;a fuel amount correction means for injecting, into said engine, the fuel in an amount corresponding to said pressure deviation when said pressure deviation is not smaller than a predetermined value; anda correction coefficient change-over means for changing a correction coefficient for said amount of fuel over to a suppressing direction in response to a timing for changing the operation condition at said stoichiometric air-to-fuel ratio and the operation condition at said lean air-to-fuel ratio over to each other.