Patent ID: 6856889

Claim:
A fuel supply control device for an internal combustion engine which comprises a combustion chamber formed from a low temperature wall surface and a high temperature wall surface, and a fuel supply mechanism which supplies volatile liquid fuel to the combustion chamber, the device comprising: a sensor which detects a temperature of the low temperature wall surface; a sensor which detects a temperature of the high temperature wall surface; and a programmable controller programmed to: calculate respectively a fuel amount adhering to the low temperature wall surface, a fuel amount adhering to the high temperature wall surface, and a first vaporized fuel amount that is supplied in the form of gas or mist of fine particles in the combustion chamber relative to a fuel amount supplied by the fuel supply mechanism; calculate a second vaporized fuel amount which vaporizes from the fuel adhering to the low temperature wall surface and burns, according to the temperature of the low temperature wall surface; calculate a third vaporized fuel amount which vaporizes from the fuel adhering to the high temperature wall surface and burns, according to the temperature of the high temperature wall surface; calculate a combustion fuel amount in the combustion chamber based on the first vaporized fuel amount, the second vaporized fuel amount, and the third vaporized fuel amount; calculate a target fuel injection amount based on the combustion fuel amount; and control a fuel amount to be supplied by the fuel supply mechanism according to the target fuel injection amount.