| 摘要 |
PURPOSE:To flatten the volume of fuel supply upon low load operation and as well to aim at stabilizing the speed of an engine, by providing an air bypass passage connecting between the air intake upstream side of a fuel injection valve and the downstream side of a throttle valve for branching a part of intake air through the air bypass passage. CONSTITUTION:A fuel controller is such that Carman vortices generated by a voltex generting column 6 and having a frequency proportional to the volume of intake air are detected by an ultrasonic transmitter 5 and a receiver 8 in an air intake volume sensor 5, and are delivered to a controller 10 after they are converted into a square wave (a) having a frequency proportional to the voltex frequency by a sensor unit 9. And pulses (b) having a frequency synchronous with the square wave (a) generated in the sensor unit 9, are applied to an injector 3 for drivingly controlling the injector 3. In the fuel controller as above- mentioned, there is provided an air bypass passage 11 having one end opened to an intake air passage 1 between the injector 3 and the intake air volume sensor 5 and the other end opened to the air intake air passage 1 downstream of a throttle valve 2, thereby a part of fuel is stayed on the upstream side of the throttle valve 2 for attaining the desired end. |
