Patent ID: 6701244
Filing Date: 2004-03-02
Classification: F01N,F02B,F02D,F02M,Y02T,Y10T

Abstract:
A device for controlling an excess air factor of an air-fuel mixture which is supplied to an engine, comprising:a sensor which detects an operation condition of the engine; a sensor which detects a real fresh air intake amount of the engine; a fuel supply mechanism which supplies fuel to the engine; and a programmable controller programmed to: set a basic target excess air factor based upon the operation condition; set a target fresh air intake amount based upon the operation condition; calculate a target excess air factor by correcting the basic target excess air factor based upon the target fresh air intake amount and the real fresh air intake amount; calculate a target fuel supply amount based upon the target excess air factor; and control a fuel supply amount of the fuel supply mechanism to be equal to the target fuel supply amount.