| 摘要 |
PURPOSE:To improve the detection accuracy of a suction air flow rate in spite of the transfer to a transient state by providing a means for detecting the opening degree of a throttle valve, means for detecting the air pressure in a suction pipe and means for detecting the transient state of an engine. CONSTITUTION:The transient condition of the engine is detected by detecting the opening degree TVO of the throttle valve of a suction pipe 3 with a sensor 10, detecting the suction air pressure PB with a pressure sensor 11 and inputting the detected values including the detected values of an engine speed detecting sensor 15, etc., into a control unit 20 The control unit 20 reads the signal TVO first and compares the DELTATVN obtd. by correcting the differential value thereof within unit time by a rotating speed N with a prescribed value as said value is proportional to the air flow rate. The air flow rate is calculated by the outputs from the sensor 11 when the engine is not in the transient state and outputs from the sensor 11 and the sensor 10 upon transfer to the transient state. The suction air quantity is thus exactly detected in spite of the transfer to the transient state.
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