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    • 10. 再颁专利
    • Exhaust gas purification system of internal combustion engine
    • 内燃机废气净化系统
    • USRE42056E1
    • 2011-01-25
    • US09945835
    • 2001-09-05
    • Shusuke AkazakiKohei HanadaYuji YasuiTadashi SatohTakashi Haga
    • Shusuke AkazakiKohei HanadaYuji YasuiTadashi SatohTakashi Haga
    • F02M25/06
    • B01D53/9495B01D53/9445B01D53/9486B01D53/96B01D2253/108B01D2253/3425F01N3/0835F01N3/0871F01N3/0878F01N9/00F01N13/009F01N13/0097F01N2240/36F01N2250/12F01N2370/40F01N2410/00F01N2410/12F02D9/04F02D9/1055F02D21/08F02M26/15F02M26/46F02M26/49Y02T10/20Y02T10/22Y02T10/47
    • A system for purifying exhaust gas generated by an internal combustion engine including a bypass branching out from the exhaust pipe downstream of a catalyst and merging to the exhaust pipe, an adsorber installed in the bypass, a bypass valve member which closes the bypass, and an EGR conduit connected to the bypass at one end and connected to the air intake system for recirculating the exhaust gas to the air intake system. The bypass valve member is opened for a period after engine startup to introduce the exhaust gas such that the adsorber installed in the bypass adsorbs the unburnt HC component in the exhaust gas. The adsorber adsorbs the HC component when the exhaust temperature rises and the adsorbed component is recirculated to the air intake system through the EGR conduit. In the system, the bypass valve is provided at or close to the branching point in the exhaust pipe and a chamber is provided close to the branching point such that the conduit is connected to the bypass at the one end in the chamber. The bypass valve member is combined with an exhaust pipe valve member as a combination valve such that when the bypass valve member closes the bypass, the exhaust pipe valve member opens the exhaust pipe. With the arrangement, the system can effectively prevent the exhaust pipe from being clogged even when a valve for closing a bypass is stuck in the closed position. At the same time, the system can provide a relatively short EGR conduit for recirculating unburnt HC component adsorbed from the adsorber and the adsorption and desorption are conducted optimally.
    • 一种用于净化由内燃机产生的废气的系统,所述内燃机包括从催化剂下游的排气管分支出并与排气管并流的旁路,安装在旁路中的吸附器,关闭旁路的旁通阀构件,以及 EGR管道在一端连接到旁路,并连接到进气系统,用于将废气再循环到进气系统。 旁通阀构件在发动机启动后打开一段时间以引入废气,使得安装在旁路中的吸附器吸附废气中的未燃HC组分。 当排气温度升高时,吸附器吸附HC组分,吸附组分通过EGR导管再循环到进气系统。 在该系统中,旁通阀设置在排气管中的分支点处或其附近,并且在靠近分支点设置室,使得导管在腔室的一端连接到旁路。 旁通阀构件与作为组合阀的排气管阀构件组合,使得当旁通阀构件关闭旁路时,排气管阀构件打开排气管。 通过这样的结构,即使关闭旁路的阀卡在闭合位置,也能够有效地防止排气管堵塞。 同时,该系统可以提供相对较短的EGR导管,用于再循环吸附器吸附的未燃烧的HC组分,吸附和解吸是最佳的。