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    • 92. 发明授权
    • Apparatus for reducing the toxic components in the exhaust gas of
internal combustion engines
    • 用于减少内燃机排气中的有毒成分的装置
    • US3981288A
    • 1976-09-21
    • US572286
    • 1975-04-28
    • Wolf Wessel
    • Wolf Wessel
    • F02D41/34F02D3/00F02D35/00F02D41/32F02M1/04F01N3/00
    • F02D41/32F02D35/0092
    • A fuel supply and metering valve assembly used for injection of fuel to an internal combustion engine includes a control pressure circuit which determines the restoring force on the movable member of the fuel metering valve. The magnitude of the control pressure, and hence the fuel quantity metered out by the valve assembly can be altered by the intermittent actuation of a pressure relief valve which controls a fluid bypass. The duty cycle of the intermittently acting bypass valve is controlled by a regulating device which responds to the indications of measuring transducers, for example an oxygen probe located in the exhaust line of the engine. The transducer signal is superimposed on a sawtooth voltage at the input of a differential amplifier which interacts with other control circuitry so as to vary the length of time during which the electromagnetic bypass valve is energized.
    • 用于向内燃机喷射燃料的燃料供应和计量阀组件包括控制压力回路,该控制压力回路确定燃料计量阀的可动件上的回复力。 控制压力的大小以及因此由阀组件计量出的燃料量可以通过间歇地驱动控制流体旁路的压力释放阀来改变。 间歇作用旁通阀的占空比由一个调节装置控制,该调节装置响应于测量换能器的指示,例如位于发动机排气管线中的氧气探头。 换能器信号叠加在与其他控制电路相互作用的差分放大器的输入处的锯齿波电压上,以便改变电磁旁路阀通电的时间长度。