Patent ID: 7044108
Filing Date: 2006-05-16
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A fuel injection control apparatus for an internal combustion engine, wherein the engine has a first fuel injection valve for injecting fuel into a cylinder of the engine, and a second fuel injection valve for injecting fuel into an intake passage connected to the cylinder, the apparatus comprising: control means for controlling the fuel injection valves in a fuel injection mode that corresponds to an operational state of the engine; detecting means for detecting a combustion state in the cylinder; and switching means, wherein, when deterioration of the combustion state is detected by the detecting means while the engine operational state is in a predetermined operational region where fuel is injected at least from the first fuel injection valve, the switching means switches the fuel injection mode such that the ratio of the amount of fuel injected from the first fuel injection valve to the entire amount of fuel supplied to the cylinder is decreased, wherein, when the pressure of fuel supplied to the first fuel injection valve is lowered, the switching means switches the fuel injection mode based on the detection of the combustion state.