To optimally control the fuel amount fed into a cylinder by raising the precision in a model calculation in consideration of a deposit adhering to an injector.
The deposit amount of a cylinder injector 42 is calculated using a tip temperature Tdinj of the calculated cylinder injector 42 (step 102). The values of a cylinder adhesion ratio and a residual ratio are selected corresponding to the deposit amount (steps 106 and 108). The deposit amount of a port injector 40 is calculated using a tip temperature Tpinj of the calculated port injector 40 (step 112). The values of port and valve adhesion ratio and residual ratio are selected corresponding to the deposit. The fuel injection amounts of each injector 40 and 42 are calculated using selected each adhesion ratio and each residual ratio (step 122).
NAGAI TOSHINARI
ADACHI NORIYASU
KOJIMA KAZUNORI
Mamoru Takada
Hidekazu Onishi
Atsushi Hirayama