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    • 4. 发明授权
    • Method and apparatus for controlling fuel flow to lean burn engines
    • 用于控制燃料流向稀薄燃烧发动机的方法和装置
    • US5353776A
    • 1994-10-11
    • US34605
    • 1993-03-22
    • Robert W. BurrahmDavid P. Meyers
    • Robert W. BurrahmDavid P. Meyers
    • F02D9/02F02D35/00F02M23/04F02D41/14
    • F02D9/02F02D35/0053F02M23/04F02D2009/0272Y02T10/146
    • The system for controlling the air/fuel mixture introduced into a lean burn engines includes a fuel/air mixing carburetor that is connected to the intake conduit to the engine and an air by-pass conduit that is also connected to the intake conduit. The main throttle valve is located downstream of the connection between the carburation conduit and the by-pass conduit so that mixing of the carbureted fuel/air mixture with the by-pass air occurs upstream of the main throttle valve. Accordingly, the main throttle valve does not control the air/fuel ratio but rather controls the quantity of fuel being introduced into the engine. The by-pass throttle valve may be controlled by an oxygen sensor in the exhaust system or by a fuel sensor in the intake system, when operating on natural gas, gasoline, hydrogen or alcohol fuel, as desired.
    • 用于控制引入稀燃燃烧发动机的空气/燃料混合物的系统包括连接到发动机的进气管道的燃料/空气混合化油器和还连接到进气管道的空气旁路管道。 主节流阀位于渗碳管道和旁通管道之间的连接下游,使得化油燃料/空气混合物与旁路空气的混合发生在主节流阀的上游。 因此,主节流阀不控制空燃比,而是控制引入发动机的燃料量。 根据需要,当在天然气,汽油,氢气或酒精燃料中进行操作时,旁通节流阀可以由排气系统中的氧传感器或进气系统中的燃料传感器控制。