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    • 9. 发明授权
    • High pressure fuel supplying apparatus for internal combustion engine and method for controlling the apparatus
    • 用于内燃机的高压燃料供给装置及其控制方法
    • US06745751B2
    • 2004-06-08
    • US10455529
    • 2003-06-06
    • Hiromitsu SeoMasanao Idogawa
    • Hiromitsu SeoMasanao Idogawa
    • F02D4106
    • F02D41/3845F02D41/062F02D2041/2027F02D2200/503F02M59/022F02M59/366F02M63/0225F02M63/024F02N99/006
    • A fuel pump draws pumps fuel from a fuel tank to a pressurizing chamber during a suction stroke, and pressurizes and sends fuel in the pressurizing chamber to a delivery pipe. A electromagnetic valve is actuated by electricity from a battery to electively connects and disconnects the fuel tank with the pressurizing chamber. An ECU determines opening and closing timing of the electromagnetic valve based on the rotation al phase of an engine. When the rotational phase of the engine is not identified, the ECU executes a duty control to cyclically repeat supplying and stopping of current to the electromagnetic valve. The ECU extends a current supplying period in each cycle of the duty control as the voltage of the power supply is lowered. As a result, the electromagnetic valve is reliably closed particularly at each pressurizing stroke, which improves the pressure increasing efficiency of fuel supplied to a fuel injection system.
    • 燃油泵在吸入冲程期间将燃料从燃料箱抽吸到加压室,并将加压室内的燃料加压并输送到输送管。 电磁阀由来自电池的电力驱动,以选择性地连接和断开燃料箱与加压室。 ECU基于发动机的旋转相位来确定电磁阀的打开和关闭正时。 当未识别发动机的旋转相位时,ECU执行占空比控制以周期性地重复向电磁阀供应和停止电流。 当电源的电压降低时,ECU在占空比控制的每个周期中延长电流供应周期。 结果,特别是在每个加压行程时电磁阀可靠地闭合,这提高了供给燃料喷射系统的燃料的增压效率。