To effectively prevent engine stall of an internal combustion engine provided with a supercharger and a motor for raising supercharging pressure of the supercharger and improve overall performance of the internal combustion engine.
ECU 100 performs an engine stall prevention process in parallel with a fuel injection process. In the engine stall prevention process, ECU 100 operates a motor of MAT 206 to assist rise of supercharging pressure when rotation speed Ne of an engine 200 gets less than a threshold rotation speed A. An upper limit value Qf of fuel injection quantity defined as limit to generate material to be removed such as smoke rises with accompanying rise of actual supercharging pressure Pr by assist by the motor, and quantity of fuel which can be injected increases. Consequently, fuel to secure low speed torque can be injected in low rotation speed zone and engine stall can be prevented. Also, ECU 100 operates MAT 206 in a period other than transient period to raise supercharging pressure as high as possible.
SHOJI AKIRA
AOYAMA TARO
TAUCHI YUTAKA
MATSUMOTO TAKASHI
KAWAGUCHI BUNGO
KENJO AKIRA
Koji Yamamoto
Satoshi Nakamura