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1. 发明授权

US5709822A Fuel regulating mechanism for a rotary throttle valve type carburetor 失效
标题翻译：旋转节流阀式化油器的燃油调节机构
公开(公告)号：US5709822A
公开(公告)日：1998-01-20
申请号：US682124
申请日：1996-07-17
申请人： Michiyasu Togashi
发明人： Michiyasu Togashi
IPC分类号： F02M3/09 , F02M3/08 , F02M3/12 , F02M7/14 , F02M9/02 , F02M9/08 , F02M17/04
CPC分类号： F02M7/14 , F02M3/08 , F02M9/02 , F02M9/085 , Y10S261/84
摘要： A fuel regulating method and mechanism for a rotary throttle (barrel-type) carburetor which prevents an end-user A/F adjustment that would cause increase in fuel quantity to a level in excess of a regulated value so as to comply with the exhaust gas emissions regulations. A cylindrical throttle valve having a throttle hole is disposed in an air intake passage of the carburetor body 12, the air flow is controlled by rotation of the throttle valve and the fuel flow is controlled by the position of a fuel regulating needle, attached to the throttle valve, relative to a fuel jet port of a fuel supply pipe in the carburetor body due to axial movement of the throttle valve. A bypass passage is provided within the carburetor body to communicate the throttle valve hole and fuel jet area with the air intake passage upstream of the throttle valve. An air flow regulating needle valve in the air passage is operable to adjust the bypass air flow in the air passage to lean the pre-set idle A/F ratio from a maximum rich factory adjustment. The fuel regulating needle valve is sealed to prevent exterior access by the end-user after making the factory adjustment.
摘要翻译：一种用于旋转油门（桶式）化油器的燃料调节方法和机构，其防止将使燃料量增加到超过规定值的水平的最终用户空调调节，以符合废气排放法规。具有节流孔的圆柱形节流阀设置在化油器主体12的进气通道中，通过节流阀的旋转来控制空气流，燃料流由燃料调节针的位置控制，节流阀相对于由于节流阀的轴向移动而在化油器主体中的燃料供给管的燃料喷射口。在化油器主体内设置旁路通道，以将节流阀孔和燃料喷射区域与节流阀上游的进气通道连通。空气通道中的气流调节针阀可操作以调节空气通道中的旁路空气流量，以从最大浓度的工厂调整倾斜预设的空闲A / F比。燃料调节针阀密封，以防止出厂调整后最终用户的外部通道。

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