Patent ID: 8005608

Claim:
A fuel injection control apparatus for an internal combustion engine, comprising: a fuel injection portion that performs each of first fuel injection for performing stratified-charge combustion, and second fuel injection for performing homogeneous-charge combustion; and an injection distribution ratio control portion that controls an injection distribution ratio that is a ratio between an amount of fuel to be injected in the first fuel injection for one combustion stroke, and an amount of fuel to be injected in the second fuel injection for the one combustion stroke, wherein the injection distribution ratio control portion controls the injection distribution ratio to a target injection distribution ratio that is set based on a predetermined engine condition, while the predetermined engine condition is occurring; and wherein the injection distribution ratio control portion includes i) an initial injection distribution ratio setting portion that sets an initial injection distribution ratio based on an engine condition at a time of start of the internal combustion engine, and ii) a change control portion that controls a change in the injection distribution ratio by referring to the engine condition after the start of the internal combustion engine, when the injection distribution ratio is changed from the initial injection distribution ratio to the target injection distribution ratio, wherein the target injection distribution ratio is set to the injection distribution ratio at which an amount of hydrocarbon discharged from the internal combustion engine is minimized when an engine temperature is in a predetermined temperature range; and when the engine temperature is below the lower limit of the predetermined temperature range, the initial injection distribution ratio setting portion sets the initial injection distribution ratio so that a proportion of the amount of fuel to be injected in the first fuel injection is increased as compared to the target injection distribution ratio.