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    Exhaust gas purification device for an internal combustion engine
    1.
    发明授权
    Exhaust gas purification device for an internal combustion engine 有权
    内燃机用废气净化装置

    公开(公告)号：US06499294B1

    公开(公告)日：2002-12-31

    申请号：US09399287

    申请日：1999-09-17

    申请人： Kenji Katoh ,  Takaaki Itou ,  Hiroshi Tanaka ,  Shuichi Kubo ,  Yoshiyuki Mandokoro ,  Masahiro Taki

    发明人： Kenji Katoh ,  Takaaki Itou ,  Hiroshi Tanaka ,  Shuichi Kubo ,  Yoshiyuki Mandokoro ,  Masahiro Taki

    IPC分类号： F01N310

    CPC分类号： F01N3/0864 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N13/009 ,  F01N13/0097 ,  F01N13/011 ,  F01N2250/12 ,  F01N2510/00 ,  F01N2510/06 ,  F01N2570/16 ,  F02D41/0275 ,  Y02T10/22 ,  Y02T10/24

    摘要： A converter containing a NOx absorbing and reducing catalyst is disposed in the exhaust passage of an internal combustion engine. The upstream half portion (portion of the inlet side) of the substrate of the NOx absorbing and reducing catalyst in the converter carries the oxygen storage component that absorbs oxygen in the exhaust gas when the air-fuel ratio of the exhaust gas is lean and releases the absorbed oxygen when the air-fuel ratio of the exhaust gas flowing in is rich in addition to carrying the NOx absorbing and reducing catalyst. After NOx is absorbed by the NOx absorbing and reducing catalyst as a result of operating the engine at a lean air-fuel ratio, the engine is operated at a rich air-fuel ratio, so that NOx is released from the NOx absorbing and reducing catalyst and is purified by reduction. Here, oxygen is released from the oxygen storage component carried by the upstream half portion of the substrate and is reacted with the H2 and CO components in the exhaust gas, so that the temperature of the NOx absorbing and reducing catalyst is raised within short periods of time due to the heat of reaction. Therefore, the catalyst exhibits increased activity and the NOx absorbing and reducing catalyst exhibits improved NOx purification capability.

    摘要翻译： 含有NOx吸收和还原催化剂的转化器设置在内燃机的排气通道中。 转换器中的NOx吸收还原催化剂的基板的上游半部（入口侧的部分）在废气的空燃比稀的时候携带吸收废气中的氧的储氧成分，释放 除了携带NOx吸收还原催化剂之外，当排出的废气的空燃比富含时，吸收的氧也富含。 由于作为发动机以稀薄的空燃比运转，NO x吸收还原催化剂吸收了NOx之后，发动机的空燃比浓度较高，使NO x从NOx吸收还原催化剂 并通过还原进行纯化。 这里，从由基板的上游半部分承载的储氧成分中释放出氧，并与废气中的H 2和CO成分反应，使NOx吸收还原催化剂的温度在短时间内升高 时间由于反应的热量。 因此，催化剂表现出增加的活性，NOx吸收和还原催化剂表现出提高的NOx净化能力。

    Exhaust purifying apparatus and method for internal combustion engine
    2.
    发明授权
    Exhaust purifying apparatus and method for internal combustion engine 有权
    内燃机排气净化装置及方法

    公开(公告)号：US06378298B2

    公开(公告)日：2002-04-30

    申请号：US09759316

    申请日：2001-01-16

    申请人： Kenji Harima ,  Takaaki Itou ,  Hiroki Ichinose ,  Kenji Katoh ,  Hiroshi Tanaka ,  Keiji Itou

    发明人： Kenji Harima ,  Takaaki Itou ,  Hiroki Ichinose ,  Kenji Katoh ,  Hiroshi Tanaka ,  Keiji Itou

    IPC分类号： F01N300

    CPC分类号： F01N3/2046 ,  F01N3/05 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0835 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/0871 ,  F01N3/0878 ,  F01N3/0885 ,  F01N3/2006 ,  F01N3/22 ,  F01N3/30 ,  F01N13/009 ,  F01N13/0097 ,  F01N13/011 ,  F01N2240/02 ,  F01N2430/06 ,  F01N2570/04 ,  F01N2570/12 ,  F01N2570/14 ,  Y02A50/2344 ,  Y02T10/26

    摘要： An exhaust purifying apparatus for an internal combustion engine includes a catalyst that purifies exhaust gas from the engine, a first passage that allows exhaust gas to flow from the engine to the catalyst, and a second passage that allows exhaust gas to flow from the engine to the catalyst. The first passage includes an accelerated cooling portion whose cross section is designed so that a relatively large quantity of heat is released from the exhaust gas in the first passage, and the second passage has a cross section designed so that a relatively small quantity of heat is released from the exhaust gas in the second passage. The apparatus further includes a flow amount controller that controls amounts of exhaust gas flowing through the first and second passages, such that the amount of exhaust gas flow through the first passage is made larger than that through the second passage when the temperature of exhaust gas emitted from the engine is to be lowered by a relatively large degree before reaching the catalyst, and such that the amount of exhaust gas flow through the second passage is made larger than that through the first passage when the temperature of exhaust gas emitted from the engine is to be lowered by a relatively small degree before reaching the catalyst.

    摘要翻译： 用于内燃机的排气净化装置包括净化来自发动机的废气的催化剂，允许废气从发动机流到催化剂的第一通道和允许废气从发动机流向的第二通道 催化剂。 第一通道包括加速冷却部分，其横截面设计成使得相对较大量的热量从第一通道中的废气释放，并且第二通道具有设计成使相对少量的热量 从第二通道中的废气释放。 该装置还包括流量控制器，其控制流过第一和第二通道的废气量，使得当排放的废气温度排出时，通过第一通道的废气流量大于通过第二通道的排气量 在到达催化剂之前，发动机要相对较大地降低，并且当从发动机排出的废气的温度为从发动机排出的温度为 在达到催化剂之前要相对较小地降低。

    Exhaust gas purification device for an internal combustion engine
    3.
    发明授权
    Exhaust gas purification device for an internal combustion engine 有权
    内燃机用废气净化装置

    公开(公告)号：US06289672B1

    公开(公告)日：2001-09-18

    申请号：US09346710

    申请日：1999-07-02

    申请人： Kenji Katoh ,  Takaaki Itou ,  Toshio Tanahashi ,  Hiroshi Tanaka ,  Naoto Suzuki ,  Yukio Kinugasa

    发明人： Kenji Katoh ,  Takaaki Itou ,  Toshio Tanahashi ,  Hiroshi Tanaka ,  Naoto Suzuki ,  Yukio Kinugasa

    IPC分类号： F01N300

    CPC分类号： F02D41/1462 ,  F01N3/0814 ,  F01N3/0842 ,  F01N13/009 ,  F01N13/011 ,  F01N13/107 ,  F01N2430/06 ,  F02D41/027 ,  F02D41/0275 ,  F02D41/1443 ,  F02D41/1456 ,  F02D41/1465 ,  F02D41/1498 ,  F02D41/3029 ,  F02D41/307 ,  F02D41/405 ,  F02D2011/102 ,  F02D2200/0806 ,  F02D2200/1015 ,  F02D2200/602 ,  Y02T10/44

    摘要： An NOx occluding and reducing catalyst is disposed in an exhaust gas passage of an internal combustion engine that operates at a lean air-fuel ratio. When the engine is operating at a lean air-fuel ratio, the NOx occluding and reducing catalyst absorbs NOx in the exhaust gas. To release NOx, the engine is operated at a rich air-fuel ratio so that the exhaust gas flowing into the NOx occluding and reducing catalyst acquires a rich air-fuel ratio. While the engine is operated in a region of moderate lean air-fuel ratios of from the stoichiometric air-fuel ratio to an air-fuel ratio of about 20 at the time when the engine operating air-fuel ratio is changing from a lean air-fuel ratio operation to a rich air-fuel ratio operation, an electronic control unit (ECU) of the engine injects secondary fuel, that does not contribute to combustion, into the cylinders of the engine through the direct cylinder fuel injection valves in the expansion stroke or the exhaust stroke of the cylinders, so that the exhaust gas flowing into the NOx occluding and reducing catalyst acquires a rich air-fuel ratio. This prevents unpurified NOx from flowing out of the NOx occluding and reducing catalyst at the time when the engine operating air-fuel ratio is changed.

    摘要翻译： NOx吸收还原催化剂设置在以稀空燃比运转的内燃机的排气通路中。 当发动机以稀薄的空燃比运转时，NOx吸留还原催化剂吸收废气中的NOx。 为了释放NOx，发动机以丰富的空燃比运转，使得流入NOx吸留还原催化剂的废气获得浓空燃比。 虽然发动机在发动机工作空燃比从稀薄空气燃料比变化时在从理论空燃比相对于大约20的空燃比的中等稀薄空燃比的区域中运行， 燃料比操作到丰富的空燃比操作，发动机的电子控制单元（ECU）通过膨胀冲程中的直接气缸燃料喷射阀向发动机的气缸中喷射不助于燃烧的二次燃料 或气缸的排气冲程，使得流入NOx吸留还原催化剂的废气获得浓空燃比。 这防止了在发动机运转空燃比变化时未净化的NOx从NOx吸留还原催化剂流出。

    Exhaust gas purifying method and apparatus for internal combustion engine
    6.
    发明授权
    Exhaust gas purifying method and apparatus for internal combustion engine 失效
    内燃机排气净化方法及装置

    公开(公告)号：US5956947A

    公开(公告)日：1999-09-28

    申请号：US865604

    申请日：1997-05-29

    申请人： Hiroshi Tanaka ,  Takaaki Itou

    发明人： Hiroshi Tanaka ,  Takaaki Itou

    IPC分类号： F01N3/20 ,  B01D53/94 ,  F01N3/08 ,  F01N3/22 ,  F01N3/24 ,  F02B3/06 ,  F02M25/07 ,  F01N3/00

    CPC分类号： B01D53/9495 ,  F01N3/0835 ,  F01N3/0878 ,  F02M26/15 ,  F02M26/53 ,  F01N2240/18 ,  F01N2250/12 ,  F02B3/06 ,  F02M26/16 ,  F02M26/47 ,  Y02T10/20

    摘要： An adsorbent may be positively regenerate by a technique to remove adhered materials such as soot adhered to the adsorbent so that the durability of the adsorbent is enhanced. To meet this, an exhaust gas purifying apparatus for an internal combustion engine, comprises a path switcher for introducing exhaust gas from the internal combustion engine into at least one of a first exhaust gas path and a second exhaust gas path branched downstream of catalysts, an adsorbent disposed in the first exhaust gas path for adsorbing unburnt gas components contained in the exhaust gas, a recirculating device for recirculating the unburnt gas components separated from the adsorbent to an upstream side of the catalysts, and a temperature elevator for elevating a temperature of the adsorbent after the unburnt gas components separated from the adsorbent has been recirculated by the recirculating device.

    摘要翻译： 吸附剂可以通过除去粘附到吸附剂上的粘附材料如烟灰的技术来正面再生，从而提高吸附剂的耐久性。 为了实现这一点，用于内燃机的废气净化装置包括用于将来自内燃机的废气引入至催化剂下游分支的第一排气路径和第二废气通路中的至少一个的路径切换器， 设置在第一排气路径中的用于吸附废气中的未燃烧气体组分的吸附剂，用于将从吸附剂分离的未燃烧气体成分再循环到催化剂上游侧的再循环装置;以及用于提高 从吸附剂分离的未燃烧气体成分之后的吸附剂已被循环装置再循环。

    Exhaust gas purifying apparatus and method for internal combustion engine
    8.
    发明授权
    Exhaust gas purifying apparatus and method for internal combustion engine 失效
    内燃机废气净化装置及方法

    公开(公告)号：US5911681A

    公开(公告)日：1999-06-15

    申请号：US867725

    申请日：1997-06-03

    申请人： Hiroshi Tanaka ,  Takaaki Itou

    发明人： Hiroshi Tanaka ,  Takaaki Itou

    IPC分类号： F01N3/22 ,  B01D53/94 ,  F01N3/08 ,  F01N3/24 ,  F02D21/08 ,  F02M25/07 ,  F01N3/20

    CPC分类号： F02D41/0065 ,  B01D53/9495 ,  F01N3/0835 ,  F01N3/0878 ,  F02M26/15 ,  F02M26/54 ,  F01N2240/18 ,  F01N2250/12 ,  F01N2410/12 ,  F02M26/16 ,  F02M26/66 ,  Y02T10/20 ,  Y02T10/47

    摘要： To complete a regeneration process of an adsorbent adsorbing unburnt gas components, for a short period of time without making an operational condition of an internal combustion engine unstable and to prevent an ability of the adsorbent from being degraded, an exhaust gas purifying apparatus includes a first exhaust flow path and a second exhaust flow path branched downstream of the catalyst; a n adsorbent disposed in the first exhaust flow path for adsorbing unburnt gas components contained in the exhaust gas; and a recirculating device for recirculating at least part of the exhaust gas discharged from the adsorbent to an intake side of the internal combustion engine. A operational condition of the internal combustion engine is detected. A recirculation amount of the exhaust gas is changed in accordance with the detected operational condition.

    摘要翻译： 为了完成吸附未燃烧气体成分的吸附剂的再生过程，在不使内燃机的运转状态不稳定的情况下，不会使吸附剂的能力下降，并且防止吸附剂劣化的能力，废气净化装置包括：第一 排气流路和在催化剂下游分支的第二排气流路; n吸附剂，其设置在所述第一排气流路中，用于吸附废气中所含的未燃烧气体成分; 以及用于将从吸附剂排出的废气的至少一部分再循环到内燃机的进气侧的再循环装置。 检测到内燃机的运转状况。 废气的再循环量根据检测到的操作条件而改变。

    Exhaust gas purification device and exhaust gas purification method for internal combustion engine
    10.
    发明授权
    Exhaust gas purification device and exhaust gas purification method for internal combustion engine 有权
    内燃机废气净化装置及排气净化方法

    公开(公告)号：US08468805B2

    公开(公告)日：2013-06-25

    申请号：US12739539

    申请日：2008-09-30

    申请人： Kazuhiro Wakao ,  Takaaki Itou ,  Keisuke Sano ,  Kimikazu Yoda

    发明人： Kazuhiro Wakao ,  Takaaki Itou ,  Keisuke Sano ,  Kimikazu Yoda

    IPC分类号： F01N3/08

    CPC分类号： F01N3/0878 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0885 ,  F01N3/101 ,  F01N13/009 ,  F01N2240/18 ,  F01N2560/06 ,  F01N2570/22 ,  Y02T10/22

    摘要： A moisture adsorbent (32) for adsorbing moisture in exhaust gas and an NOx adsorbent (34) for adsorbing NOx are disposed in a bypass passage (30) for bypassing an exhaust passage (16) of an internal combustion engine (10). When an adsorption operation to the NOx adsorbent (34) is executed, inflow of the exhaust gas to the bypass passage (30) is allowed until the moisture amount that flows into the water adsorbent (32) reaches an allowable moisture inflow amount. The allowable moisture inflow amount is determined based on a residual moisture amount before the starting of the adsorption operation in the moisture adsorbent (32). The residual moisture amount in the water adsorbent (32) can be determined based on the temperature of the moisture adsorbent (32) at the immediately preceding execution of the purge operation.

    摘要翻译： 用于吸附废气中的水分的吸湿剂（32）和用于吸附NOx的NOx吸附剂（34）设置在用于绕过内燃机（10）的排气通道（16）的旁路通道（30）中。 当执行对NOx吸附剂（34）的吸附操作时，允许废气流入旁通通道（30），直到流入水吸附剂（32）的水分量达到允许的水分流入量。 基于水分吸附剂（32）中的吸附动作开始前的残留水分量来确定容许水分流入量。 水吸附剂（32）中的残留水分量可以基于在先前执行清洗操作时的水分吸附剂（32）的温度来确定。