| 摘要 |
PURPOSE:To prevent overrich by prohibiting increment synchronous with the crank angle after a certain number of such runs are made when such increment shall be made during period from the number of fuel injection return revolutions to a sink by a certain amount under the condition that a throttle valve is fully closed and the sink of the number of revolutions is over a specific value. CONSTITUTION:A control circuit 44 computes the fundamental fuel injection amount on the basis of the sensing values from a suction pipe pressure sensor 20 and a revolving angle sensor 42, and a variety of corrections are made on the basis of an O2 sensor 56, a suction temp. sensor 24, and a water temp. sensor 48. When a throttle valve 18 is in idle position and the revolving speed is over the fuel injection stop number-of-revolutions, fuel cut at the time of deceleration shall be made. When the sink of the revolving speed at a specified time is over a certain value and until the revolving speed sinks by a certain amount from the number of fuel injection return revolutions, increment of the fuel injection amount at the time of return is made in synchronization with the crank angle. After a certain number of synchronous increments are made, implementation of such synchronous increments is prohibited.
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