| 摘要 |
PURPOSE:To ensure the safety performance of a vehicle against any unpredictable failure by stopping the operation of a fuel injection valve in such a case that the ratio of the compensation value, which is obtained in compensation for the output of an air flow sensor in response to the output of a temperature sensor, to the output of a throttle valve opening sensor exceeds a predetermined value. CONSTITUTION:In the captioned control device, a control valve 31 operated through an actuator 3 is interposed in a bypass 8 which is arranged in such a manner as making a detour around a throttle valve 4 and the opening of said valve 31 is controlled for setting the idling speed of an engine to a desired value. Further, a fuel injection valve 5 provided in an intake valve 7 is operatively controlled in response to the quantity of fuel which is calculated on the basis of operation parameters supplied frm an air flow sensor 2 and an engine speed sensor 6 and the like. In this case, the output of a compensation circuit 97 for making compensation for the output of the air flow sensor 2 in response to the output of a temperature sensor 15, is compared with the output of a throttle valve opening sensor 10 through a comparison circuit 96, and when the output of the former exceeds the output of the latter, the control of the idling speed of the engine is judged to be in abnormal state, so that the operation of the fuel injection valve 5 is to be stopped.
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