| 摘要 |
PURPOSE:To prevent fuel flow from being disordered by fuel vapor produced when a solenoid valve of a feedback carburetor is opened and closed, by disposing the portion where an auxiliary fuel passage opened and closed by said solenoid valve joins a main fuel passage to locate in a main well. CONSTITUTION:A valve 6 actuated by an electromagnetic coil 4 of a feedback carburetor functions to keep the air-fuel ratio at a required value by controlling the fuel flow rate through an auxiliary fuel passage 20 by opening and closing a fuel orifice 7. The auxiliary fuel passage 20 is opened in a main well 2. With such an arrangement, fuel vapor produced when a solenoid valve 6 is opened and closed is introduced into the main well 2 and flows upward therein, so that the vapor does not enter into a fuel passage 12. Therefore, adverse influence by the fuel vapor can be prevented particularly at the time of low- speed operation of an engine. |
