Abstract: A completely closing position detecting and correcting means 11 detecting a stop of operation of the combustion engine, controlling the throttle valve 3 to be in a completely closing position, detecting the completely closing position, and correcting the target position signal outputted from the target opening degree setting means 9 in a completely closing state by shifting the target position signal on a side of opening from an actual completely closing position by a predetermined amount, whereby even though the detected value from the throttle valve opening degree detecting sensor has an error at time of completely closing the throttle valve, a trouble is not caused.

Abstract: A intake air flow rate controlling device including a throttle valve 3 located in an intake air passage 2 of a combustion engine, a motor 5 controlling an intake amount by controlling the throttle valve 3, a motor driving means 12 driving the motor 5, the throttle sensor 6 detecting a throttle opening degree, a target opening degree setting means 9 operating a target throttle opening degree and outputting a target position signal to the motor driving means 12, a completely closing position learning means 10 learning a completely closing position of the throttle valve 3 from a completely closing position signal from the throttle sensor, and a completely closing position detecting and correcting means 11 detecting a stop of operation of the combustion engine, controlling the throttle valve 3 to be in a completely closing position, detecting the completely closing position, and correcting the target position signal outputted from the target opening degree setting means 9 in a completely closing state by shifting

Abstract: A completely closing position detecting and correcting device 11 detecting a stop of operation of the combustion engine, controlling the throttle valve 3 to be in a completely closing position, detecting the completely closing position, and correcting the target position signal outputted from the target opening degree setting device 9 in a completely closing state by shifting the target position signal on a side of opening from an actual completely closing position by a predetermined amount, whereby even though the detected value from the throttle valve opening degree detecting sensor has an error at time of completely closing the throttle valve, a trouble is not caused.