| 摘要 |
The present invention provides an automatic adjustment carburetor capable of offering fuel economy and low pollution, wherein an automatic adjustment air-blocking device and a gas enrichment device are appended in the intake passage of the carburetor. The air-blocking device is disposed in the intake passage in front of a throttle having a fuel needle. The middle section of the intake passage forms a room having a neck. A venturi tubular front part of expanding arc shape was formed extendedly forward from the neck in the intake passage. A rear part of pot belly shape was formed extendedly backward from the neck in the intake passage. An annular groove at the outer end of the intake passage joins an intake annular seat. A positioning shaft has a plurality of positioning grooves installed near two ends thereof. One positioning groove on each end of the positioning shaft joins a locking spring. The front end of the positioning shaft extends into a central hole of the intake annular seat to join a thread screwed with a nut. An air-blocking cone lags the positioning shaft. The front end of the air-blocking cone sticks to the front locking spring. A spring seat with a diameter larger than that of the locking spring is installed at the rear end of the air-blocking cone to lag one end of a spring. The other end of the spring sticks to a protruding locking edge at the other end of the positioning shaft. If the throttle at the rear part generates a negative pressure, the air-blocking cone will reciprocate back and forth. An exit of an emulsifying tube of the gas enrichment device is installed connectedly to the neck. When the air-blocking cone moves backward, the room of the neck changes, and fuel gas adjusts automatically. <IMAGE> |
