| 摘要 |
PURPOSE:To prevent output scattering, output decline, deterioration of exhaust characteristics or the like among cylinders by inputting correction factors for air fuel ratio scattering among the cylinders as correction elements to make intra-cylinder correction control of air fuel ratio. CONSTITUTION:A central processing unit (CPU)1 makes input/output manipula tion, operation and the like according to calculating routine for fuel injection amount memorized in a read only memory (ROM)2, and transmits output signals to fuel injection valves 44a-44d through an electric wave-form control circuit 21 to control an amount of fuel injection. Then, the intra-cylinder air-fuel ratio correction factors previously calculated by an experiment or the like are written as MAP in a specific address of a random memory (RAM)3 depending on the state of engine operation. And, fuel injection amount added with the respective intra-cylinder air-fuel ratio correction factors for the fuel injection valves 44a-44d are operated to be output by turns. Therefore, injection amount scatter ing among the respective cylinders is corrected, and air-fuel mixture with equal air fuel ratio can be supplied.
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