| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a shortage of a fuel injection amount even when a degree of the generation of the vapor caused by a concentration change of an easy-volatility fuel component such as an alcohol is different, and also to prevent the generation of the operation sound associated with the fuel boosting as much as possible, in a control device for the fuel injection of an internal combustion engine that adjusts a fuel injection ratio between a direct-injection injector and an intake-passage injector according to an operation condition of the internal combustion engine. <P>SOLUTION: A vapor amount Vp contained in the fuel is estimated from a map (S158 and S160) selected based on an alcohol concentration Coh (S162), and a delay time DTinj added to a fuel-injection period which is based on the direct-injection injector at a start depending on the vapor amount Vp is calculated (S164-S168). As a result, even when the alcohol concentration Coh has changed to differ the degree of the vapor generating in a fuel supply system, the shortage of the fuel injection amount is prevented and the generation of the operation sound associated with the fuel boosting is prevented as much as possible. <P>COPYRIGHT: (C)2012,JPO&INPIT |
