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    • 3. 发明授权
    • Exhaust gas recirculation control system
    • 废气再循环控制系统
    • US4177777A
    • 1979-12-11
    • US824316
    • 1977-08-12
    • Kimiomi MaruyamaYoshitaka HataAkihiro Ohnishi
    • Kimiomi MaruyamaYoshitaka HataAkihiro Ohnishi
    • F02D21/08F02M25/07F02M25/06
    • F02D41/0072F02M26/47F02M26/57F02D2041/0075Y02T10/47
    • An exhaust gas recirculation (EGR) control system for an internal combustion engine, in which an EGR control valve including a vacuum-operated actuator governs the flow of recirculated exhaust gas according to the admission of air into the engine. To accomplish the control with high precision, the control system includes a flow sensor which provides an electrical signal representing the volume flow rate of air in the induction passage and a control circuit for controlling the magnitude of vacuum for the EGR valve through the operation of an electromagnetic valve based on the signal from the flow sensor. Optionally the control system has another flow sensor which provides an electrical signal representing the volume flow rate of recirculated exhaust gas to the control circuit to accomplish a feedback control.
    • 一种用于内燃机的废气再循环(EGR)控制系统,其中包括真空操作的致动器的EGR控制阀根据进入发动机的空气的入口来控制再循环废气的流动。 为了高精度地进行控制,控制系统包括一个流量传感器,该流量传感器提供一个表示该进气通道中的空气的体积流量的电信号,以及一个控制电路,用于通过操作一个 电磁阀基于来自流量传感器的信号。 可选地,控制系统具有另一个流量传感器,该流量传感器提供表示再循环废气到控制电路的体积流量的电信号以完成反馈控制。