Fuel injection amount control system for internal combustion engines and intake passage wall temperature-estimating device used therein

Abstract From the Canadian patent

A fuel injection amount control system for an internal combustion engine includes an ECU which calculates a first amount of fuel directly drawn into each combustion chamber out of an amount of fuel injected into the intake passage via a corresponding fuel injection valve, a second amount of fuel carried off fuel adhering to the wall surface of the intake passage into the combustion chamber, and an amount of fuel to be injected into the intake passage based on, the first fuel amount and the second fuel amount calculates an air-fuel ratio correction amount based, on an output form an air-fuel ratio sensor arranged in the exhaust system, and corrects the amount of fuel to be injected into the …