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    • 9. 发明授权
    • Exhaust gas recirculation system for internal combustion engine
    • 内燃机排气再循环系统
    • US4282847A
    • 1981-08-11
    • US74765
    • 1979-09-11
    • Yasuhiro IkutaMasashi Matsuo
    • Yasuhiro IkutaMasashi Matsuo
    • F02M25/07F02B47/08
    • F02M26/56F02M26/39
    • An exhaust gas recirculation system for an internal combustion engine, having an exhaust gas recirculation passage, a constant pressure chamber disposed at an intermediate portion of the exhaust gas recirculation passage, a pressure regulating valve operative in response to the exhaust gas pressure in the constant pressure chamber, a first flow-rate control valve actuated by vacuum regulated by the pressure regulating valve and adapted to open and close the exhaust gas recirculation passage and a second flow-rate control valve adapted to change the cross-sectional area of the exhaust gas recirculation passage in response to the level of load applied to the internal combustion engine. The exhaust gas recirculation system further has an atmospheric pressure introduction valve communicated with a vacuum passage through which the first flow-rate control valve is communicated with the pressure regulating valve and adapted to selectively introduce the atmospheric pressure into the vacuum passage in accordance with the level of the vacuum established in the intake manifold of the engine.
    • 一种用于内燃机的排气再循环系统,具有废气再循环通道,设置在废气再循环通道中间部分的恒压室,响应于恒定压力的排气压力而工作的压力调节阀 腔室,由压力调节阀调节并适于打开和关闭废气再循环通道的真空致动的第一流量控制阀和适于改变废气再循环的横截面面积的第二流量控制阀 响应于施加到内燃机的负载水平。 排气再循环系统还具有与真空通路连通的大气压力导入阀,第一流量控制阀通过该真空通路与压力调节阀连通,并适于根据水平选择性地将大气压力引入真空通道 在发动机的进气歧管中建立的真空。