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    • 5. 发明申请
    • CONSTANT PRESSURE SELF-REGULATING COMMON RAIL SINGLE PISTON PUMP
    • 恒压自调节通用单柱活塞泵
    • WO2015005915A1
    • 2015-01-15
    • PCT/US2013/049861
    • 2013-07-10
    • STANADYNE CORPORATION
    • LUCAS, Robert, G.NORKIN, Yevgeniy
    • F02M55/02
    • F02M63/0265F02M59/46F02M59/464F02M63/005F02M63/0056
    • The pump delivered pressure is regulated to a substantially constant set value, and output flow is varied by an inlet metering valve (5) via feedback from the motion of, or flow from the spilled fuel through, a delivered pressure regulator (13, 19). The pressure regulating element can be biased to close a seal surface (12') against flow from the outlet side of the pump (14) toward the inlet metering valve when the pump is turned off, thereby holding sufficient rail pressure to prevent boiling during hot soak conditions. In another aspect, a flow stabilization orifice (18) is provided between the outlet of the pump and the inlet metering valve, e.g., upstream of the pressure regulating element. In yet a further aspect, the inlet metering valve is hydraulically responsive (6, S, L) to changes in flow resulting from movement of the pressure responsive element (13).
    • 泵的输送压力被调节到基本恒定的设定值,并且输出流量通过来自输送压力调节器(13,19)的来自溢出燃料的运动或流动的输入计量阀(5)而变化, 。 当泵关闭时,压力调节元件可以被偏置以关闭密封表面(12')以防止从泵(14)的出口侧到入口计量阀的流动,从而保持足够的导轨压力以防止在热的过程中沸腾 浸泡条件。 另一方面,流量稳定孔口(18)设置在泵的出口和入口计量阀之间,例如压力调节元件的上游。 在另一方面,入口计量阀是液压响应(6,S,L)以由压力响应元件(13)的运动引起的流动变化。
    • 6. 发明申请
    • ELECTRONICALLY CONTROLLED INLET METERED SINGLE PISTON FUEL PUMP
    • 电子控制入口单活塞燃油泵
    • WO2014137900A1
    • 2014-09-12
    • PCT/US2014/019902
    • 2014-03-03
    • STANADYNE CORPORATION
    • LUCAS, Robert, G.
    • F02M59/20
    • F02M59/025F02M37/0058F02M51/06F02M59/367F02M59/368F02M2200/09F04B1/0452F04B7/0076F04B53/1082
    • In a fuel pump and method of operation, an infeed for low pressure fuel leads to a pumping chamber where in an intake phase low pressure fuel is drawn into the pumping chamber and in a pumping phase high pressure fuel is delivered to a common rail. An inlet metering valve and an inlet check valve are upstream of the pumping chamber, and a control system closes the metering valve when no fuel is to be pumped to the common rail. The inlet check valve is also opened while the inlet metering valve is closed and no fuel is to be pumped to the rail. The inlet metering valve can include a proportionally controlled piston that produces a variable quantity of feed fuel and is closable for the no-demand condition with a maximum travel that contacts and holds open the inlet check valve.
    • 在燃料泵和操作方法中,用于低压燃料的进料导致泵送室,其中在进气相中,低压燃料被抽入泵送室,在泵送阶段,高压燃料被输送到共轨。 入口计量阀和入口止回阀位于泵送室的上游,并且当没有燃料不被泵送到共轨时,控制系统关闭计量阀。 入口止回阀也打开,而入口计量阀关闭,并且没有燃料不被泵送到轨道。 入口计量阀可以包括成比例控制的活塞,其产生可变量的进料燃料,并且对于不需要的状态可关闭,具有接触并保持打开入口止回阀的最大行程。