| 摘要 |
PURPOSE:To accelerate atomizing fuel effectively regardless of quantity of fuel feeding so as to obtain stable characteristics of an air fuel ratio by providing an ultrasonic vibrating unit consisting of the combination of wires at the downstream of a fuel feeding nozzle in a suction pipe. CONSTITUTION:A suction pipe 4 includes a throttle valve 1, a venturi 2, and a fuel feeding nozzle 3. In this case, an ultrasonic vibrating unit 6 driven by an ultrasonic vibrator 5 is provided to the downstream of the fuel feeding nozzle 3. And the ultrasonic vibrating unit 6 is formed into a form of a mesh combining wires. In this constitution, fuel which has been already atomized, out of fuel injected from the fuel feeding nozzle 3 passes through the ultrasonic vibrating unit 6 as it is, on the other hand, fuel in a form of drops relatively large in diameter hits against the ultrasonic vibrating unit 6 for being atomized either by splashing or by sticking onto the ultrasonic vibrating unit 6 followed by ultrasonic vibration therewith. Accordingly this constitution can accelerate atomizing fuel for obtaining stable characteristics of an air fuel ratio.
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