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    • 24. 发明授权
    • Efficiently pumped fuel supply system
    • 有效泵送燃油供应系统
    • US5443046A
    • 1995-08-22
    • US180626
    • 1994-01-13
    • Brian R. White
    • Brian R. White
    • F02D9/02F02M3/07F02M11/02F02M35/10F02M69/46F02D3/02F02M37/08
    • F02M69/465F02M11/02F02M3/07F02M35/10216F02D2009/0279F02D9/1055F02M35/1038
    • In a low pressure continuous flow fuel injection system for an internal combustion engine, an electric fuel pump (18) is energized with a variable duty cycle to vary the pumped volume output of the pump according to engine fuel requirements. The duty cycle is varied to energize the pump to pump substantially only the amount of fuel required by the engine, such that at idle or low engine speed, the pump is energized a lower percentage of the time than at high engine speed. Fuel flow through the fuel injector (12) is continuous, but energization of the pump is not, such that the pump is not pumping at full capacity when unneeded. An electric idle air control valve (54) is also energized with a variable duty cycle to vary the amount of bypass idle air supplied to the intake manifold (10).
    • 在用于内燃机的低压连续流量燃料喷射系统中,电动燃料泵(18)以可变的工作周期被激励,以根据发动机燃料要求改变泵的泵送体积输出。 改变占空比以激励泵以基本上仅泵送发动机所需的燃料量,使得在怠速或低发动机转速下,泵被激励的时间比在高发动机转速下更低的百分比。 通过燃料喷射器(12)的燃料流是连续的,但是泵的通电不是这样的,使得当不需要时泵不能以满容量泵送。 电动怠速空气控制阀(54)也以可变的工作周期通电以改变供给到进气歧管(10)的旁路怠速空气的量。