| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device for an internal combustion engine, quickly setting the amount of oxygen storage in a catalyst to be proper when resetting stopped fuel injection while more effectively preventing the worsening of driveability. SOLUTION: The fuel injection control device stops fuel injection from an injector 39 if an engine revolution speed Ne is higher than an injection stopping revolution speed NEFCth when a throttle valve opening TA is zero. The device resets the fuel injection so that the air-fuel ratio of the engine is richer than a theoretical air-fuel ratio when the throttle valve opening TA is zero or greater during stopping fuel injection (forcible reset), and resets fuel injection so that the air-fuel ratio is the theoretical air-fuel ratio when the revolution speed NE is lower than an injection resetting revolution speed NEREth (natural reset at a time t4) as the valve opening TA remains zero during stopping fuel injection. COPYRIGHT: (C)2007,JPO&INPIT
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