| 摘要 |
PURPOSE:To obtain an optimum air-fuel ratio at all times in a system to control fuel supply volume by a feed-back based on an output of an O2 sensor by changing a standard voltage at the time of the above feed-back control based on an output of a suction air volume sensor. CONSTITUTION:An output signal Vs of an O2 sensor provided at an exhaust air system is inputted in a plus terminal of a comparator 3 via a buffer amplifier 2, while in a minus terminal, a standard voltage Ve from a standard voltage operation circuit 11 is inputted and based on the compared results of both signals Vs and Ve, the fuel supply volume to the engine is controlled via a control unit 4. The standard voltage operation circuit 11 inputs the output signal Va of the suction air volume sensor 16 into a primary lagging circuit 14 via a buffer amplifier 12 and the primary lagging signal Vav to have a fixed time delay of time is inputted in a subtraction circuit 15 via a buffer amplifier 13. Here, it is made to output the standard voltage Ve which is arrived by subtracting K(constant)XVav from the basic standard voltage Veo. |
