| 摘要 |
PURPOSE:To enable a preferable operation of an engine under any operative condition of the engine by a method wherein even if some bubble are produced in the carburetor, they are caused to flow upwardly in the mixing pipe. CONSTITUTION:Lower end of the mixing pipe 10 is opened and an enlarged part 10b is arranged. When the mixing pipe 10 is arranged in the main well 4, bubbles 11 produced in the main well 4 are flowed upwardly and only a fuel is flowed upwardly outside of the mixing pipe 10. The bubbles 11 are mixed with the air and fuel suctioned from the main air jet 5, passed through the breeding holes 10a and flowed out of the nozzle passage 7. Continuous flow of both air containing fuel vapour and liquid fuel and another liquid fuel flowed upwardly in a clearance 12a are mixed to each other and then injected out as an air fuel mixture flow having a uniform composition from the main nozzle 8. Therefore, the mixture always shows a uniform air fuel mixture ratio. |
