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    • 5. 发明申请
    • No-return loop fuel system
    • 回程循环燃油系统
    • US20050034710A1
    • 2005-02-17
    • US10946953
    • 2004-09-22
    • Lynwood CraryJohn ForgueMark Johansen
    • Lynwood CraryJohn ForgueMark Johansen
    • F02M37/00F02M33/08F02M69/00F02M69/46F02M69/54F16K7/14F16K31/126F16K35/00F02M1/00
    • F02M63/028F02D33/006F02M33/08F02M37/0023F02M37/0029F02M37/0058F02M69/465F02M69/54F16K7/14F16K35/00
    • A no-return loop fuel injection system supplies fuel from a fuel pump to an injector fuel rail, through a fuel line. A biased closed pressure control valve communicates with the fuel line and has a valve head preferably of a diaphragm type carrying a fuel side having first and second areas which are segregated and defined by a valve seat when the pressure control valve is closed. An opposite second side of the pressure control valve is exposed to a reference pressure and a closure biasing force. The pressure control valve opens when a hydraulic opening force induced by a fuel pressure exerted upon the first area, plus a fuel pressure exerted upon the second area, is greater than the net reference pressure and closure biasing forces. Preferably, the first area is smaller than the second area, thus manipulating the effects of the fuel pressures exerted upon the first and second areas with respect to opening the valve. When the pressure control valve is open, the system operating pressure exposed to both the first and second areas is sufficient to produce the hydraulic force necessary to keep the valve open. Preferably, the pressure control valve is part of a pressure valve assembly of a fuel pump module located inside a fuel tank. The pressure valve assembly preferably has a flow check valve orientated in a parallel flow configuration to the pressure control valve when the fuel pump is of a variable speed type, or, for systems utilizing constant speed pumps the check valve is replaced with a flow bypass orifice.
    • 无返回循环燃料喷射系统通过燃料管路将燃料从燃料泵供给到喷射器燃料轨道。 偏压闭合压力控制阀与燃油管路连通,并且具有阀头,该气门头最好是带有燃料侧的隔膜式,燃料侧具有第一和第二区域,当压力控制阀关闭时,阀门被阀座隔离并限定。 压力控制阀的相对的第二侧暴露于参考压力和闭合偏压力。 当由施加在第一区域上的燃料压力引起的液压打开力加上施加在第二区域上的燃料压力大于净参考压力和闭合偏压力时,压力控制阀打开。 优选地,第一区域小于第二区域,从而控制相对于打开阀门施加在第一和第二区域上的燃料压力的影响。 当压力控制阀打开时,暴露于第一和第二区域的系统操作压力足以产生保持阀打开所需的液压力。 优选地,压力控制阀是位于燃料箱内部的燃料泵模块的压力阀组件的一部分。 当燃料泵是变速型时,压力阀组件优选地具有以平行流动形式定向到压力控制阀的流动止回阀,或者对于使用恒定速度泵的系统,止回阀被替换为流动旁通孔 。