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    Fuel-air ratio automatic control system using variable venturi structure
    70.
    发明授权
    Fuel-air ratio automatic control system using variable venturi structure 失效
    燃油比自动控制系统采用可变文丘里结构

    公开(公告)号：US4250856A

    公开(公告)日：1981-02-17

    申请号：US115551

    申请日：1980-01-25

    申请人： Harold G. Abbey

    发明人： Harold G. Abbey

    IPC分类号： F02D35/00 ,  F02M9/14 ,  F02M7/12

    CPC分类号： F02M9/14 ,  F02D35/0076 ,  Y10S261/39 ,  Y10S261/56 ,  Y10S261/64 ,  Y10S261/67 ,  Y10S261/74 ,  Y10S261/82

    摘要： An automatic control system for supplying a fuel-air mixture to an internal combustion engine through a Venturi structure conducting throttle-controlled incoming air to the intake manifold of the engine. Coaxially disposed in the casing of the structure is a cylindrical booster whose internal surface has a Venturi configuration to define a primary passage. Interposed between the booster and a ring having an external Venturi configuration mounted on the casing in an axially shiftable spool whose internal surface has a Venturi configuration to define a secondary passage having a variable throat between this surface and the spool. A tertiary passage is defined between the outer surface of the spool and the ring, incoming air passing through all three passages. An air-fuel dispersion is fed into the primary passage to intermingle with air flowing therethrough to create an atomized mixture which is fed through the variable throat of the secondary passage to further atomize the mixture which is then fed into the manifold. The air pressure difference between the inlet to the Venturi and the effective throat of the combined passages is sensed to produce a command signal for governing a servo motor in a closed loop arrangement to adjust the axial position of the spool to attain an optimum fuel-air ratio.

    摘要翻译： 一种自动控制系统，用于通过文丘里结构向内燃机供应燃料 - 空气混合物，所述文丘里结构将引导节气门控制的进入空气传导到发动机的进气歧管。 同轴地设置在结构的壳体中的是圆柱形助力器，其内表面具有文氏管构造以限定主通道。 在增压器和具有外部文氏管结构的环之间插入，该环具有安装在壳体上的可轴向移动的阀芯中，其内表面具有文丘里构造以限定在该表面和阀芯之间具有可变喉部的次通道。 在阀芯的外表面和环之间限定第三通道，通过所有三个通道的进入空气。 空气 - 燃料分散体被供给到主通道中以与流过其中的空气混合以产生雾化的混合物，其通过次级通道的可变喉部进料，以进一步雾化混合物，然后将其进料到歧管中。 感测到文丘里管入口与组合通道的有效喉部之间的气压差产生用于以闭环装置来控制伺服电动机的指令信号，以调整阀芯的轴向位置以获得最佳燃料空气 比。