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    • 4. 发明申请
    • EXHAUST EMISSION CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE
    • 内燃机排气排放控制系统
    • US20110047987A1
    • 2011-03-03
    • US12990680
    • 2009-03-12
    • Kimikazu YodaTakaaki ItouKeisuke SanoKazuhiro Wakao
    • Kimikazu YodaTakaaki ItouKeisuke SanoKazuhiro Wakao
    • F01N9/00
    • F01N3/0814F01N3/0878F01N3/0885F01N11/002F01N2410/00F01N2550/03Y02T10/47
    • An exhaust emission control system of an internal combustion engine includes: a bypass passage (22) provided in an exhaust passage (14) of the engine and arranged to bypass a main passage (16) as a part of the exhaust passage, a NOx adsorbent (28) provided in the bypass passage and adapted to adsorb at least NOx as one of components contained in exhaust gas, a channel switching device (30) that switches a channel of the exhaust gas between the main passage and the bypass passage, an adsorption control device (50) that controls the channel switching device, based on operating conditions of the engine, so as to cause the exhaust gas to flow through the bypass passage, and an adsorbing capability determining device (50) that determines, when the adsorbing capability of the NOx adsorbent degrades, whether the degradation in the adsorbing capability is a surmountable degradation from which the NOx adsorbent can recover, or an insurmountable degradation from which the NOx adsorbent cannot recover.
    • 内燃机的废气排放控制系统包括:旁通通路(22),设置在发动机的排气通路(14)中,并且设置成旁路作为排气通路的一部分的主通路(16),NOx吸附剂 (28),其设置在所述旁通通路内,并且至少吸附作为废气中所含的成分之一的NOx;流路切换装置(30),其在所述主通路与旁通通路之间切换排气的通道,吸附 控制装置(50),其基于发动机的运转条件控制所述通道切换装置,以使所述排气流过所述旁通通路;吸附能力判定装置(50),其在吸附能力 的NOx吸附剂的劣化,NOx吸附剂能够回收的难以降解的吸附能力的劣化,NOx吸附剂不能再次的不可克服的劣化 盖。
    • 8. 发明授权
    • Exhaust gas purifying apparatus for internal combustion engine
    • 内燃机用废气净化装置
    • US08516801B2
    • 2013-08-27
    • US12530237
    • 2008-03-10
    • Keisuke SanoTakaaki ItouKimikazu YodaKazuhiro Wakao
    • Keisuke SanoTakaaki ItouKimikazu YodaKazuhiro Wakao
    • F01N3/08F01N3/20F01N3/24B01D53/94
    • B01D53/9495B01D2251/208B01D2257/404B01D2258/012F01N3/0814F01N3/34F01N13/009F01N2410/00
    • An object of the present invention is to provide an exhaust gas purifying apparatus for an internal combustion engine which can properly purge at least NOx of unpurified components contained in exhaust gas while considering characteristics of NOx desorbed from an adsorbent. A bypass passage 18 bypassing a main exhaust passage 12 of the internal combustion engine 10 is provided. A HC/NOx adsorbent 22 having a function of adsorbing HC and NOx is provided in the bypass passage 18. A second underfloor catalyst 30 is provided downstream of the adsorbent 22. A purge passage 26 branching off from the bypass passage 18 while connecting to an intake passage is provided. An exhaust switching valve 20 and a purge control valve 28 are provided as a flow path switching means that is capable of switching a flow target into which the exhaust gas flows between the main exhaust passage 12 and the bypass passage 18. If the purging operations are executed, the intake purging operation is first executed. After that, the intake purging operation is switched to the exhaust purging operation at a timing existing after the purge of NOx is completed and at the time point at which the temperature of the adsorbent becomes stable.
    • 本发明的目的是提供一种用于内燃机的废气净化装置,其能够考虑到从吸附剂脱附的NOx的特性,能够适当地净化废气中所含的未纯化成分的NOx。 设置有绕过内燃机10的主排气通路12的旁路通道18。 具有吸附HC和NOx的功能的HC / NOx吸附剂22设置在旁通通道18中。第二底板催化剂30设置在吸附剂22的下游。一个从旁路通道18分支的清洗通道26,同时连接到 提供进气通道。 设置排气切换阀20和排气控制阀28作为流路切换装置,其能够切换排气在主排气通路12和旁通通路18之间流动的流动目标。如果清洗操作是 首先执行进气清洗操作。 之后,在完成NOx的净化之后的时刻和吸附剂的温度稳定的时刻,进行排气操作切换到排气净化操作。