| 摘要 |
PURPOSE:To improve the control precision for air-fuel ratio by avoiding the influence of the vibration of an engine power train system by correcting the correction value for fuel quantity on the basis of the signal of the engine revolution speed, besides the conventional load signal such as the opening degree of a throttle. CONSTITUTION:A control circuit 10 calculates the fundamental injection quantity on the basis of the signals of a revolution speed sensor 8 and an intake pressure sensor 5. Then, the air-fuel ratio is judged by the signal of an air-fuel ratio sensor 7. Then, the correction quantity for acceleration is calculated by the signal of a throttle sensor 9, and the correction quantity for the variation of the revolution speed is calculated by the signal of a throttle sensor 9, and the injection quantity is corrected, and a proper quantity of fuel is supplied into an engine 1 by driving an injection valve 3. Since the correction quantity is corrected during operation on the basis of the signal of the air-fuel ratio sensor 7, the control precision of the air-fuel ratio is improved. Further, since the correction for the intake air quantity and the correction for the variation of the revolution speed are separated, the erroneous operation for the correction operation due to the vibration of a power train system can be prevented.
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