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公开(公告)号:US5472673A
公开(公告)日:1995-12-05
申请号:US340438
申请日:1994-11-14
申请人: Masato Goto , Satoshi Iguchi , Kenji Katoh , Tetsuro Kihara
发明人: Masato Goto , Satoshi Iguchi , Kenji Katoh , Tetsuro Kihara
IPC分类号: B01D53/04 , B01D53/86 , B01D53/94 , F01N3/08 , F01N3/10 , F01N3/24 , F01N13/02 , F02D41/02 , B01D53/34
CPC分类号: F01N3/085 , B01D53/0454 , B01D53/8637 , B01D53/9422 , B01D53/9495 , F01N13/009 , F01N3/0807 , F01N3/0842 , F01N3/0871 , F02D41/0275 , F02D41/0285 , B01D2255/1021 , B01D2255/2042 , B01D2255/2045 , B01D2255/2061 , B01D2255/2063 , F01N2240/18 , F01N2570/04 , F01N2570/14
摘要: An engine comprising an exhaust passage having therein a NO.sub.x absorbent which absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent becomes the stoichiometric air-fuel ratio or rich. A sulphur trapping device for trapping SO.sub.x contained in the exhaust gas is arranged in the exhaust passage upstream of the NO.sub.x absorbent.
摘要翻译: 一种发动机,其特征在于,具有排气通路,其内部具有NOx吸收剂,当流入所述NOx吸收剂的废气的空燃比为稀时吸收NOx,并且当排出的废气的空燃比流入 NOx吸收剂成为化学计量空燃比或浓度。 用于捕集废气中所含的SOx的捕集捕集装置设置在NOx吸收剂上游的排气通道中。
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公开(公告)号:US5412945A
公开(公告)日:1995-05-09
申请号:US107829
申请日:1993-08-26
申请人: Kenji Katoh , Tokuta Inoue , Hidetaka Nohira , Kiyoshi Nakanishi , Satoshi Iguchi , Tetsuro Kihara , Hideaki Muraki
发明人: Kenji Katoh , Tokuta Inoue , Hidetaka Nohira , Kiyoshi Nakanishi , Satoshi Iguchi , Tetsuro Kihara , Hideaki Muraki
IPC分类号: B01D53/04 , B01D53/94 , F01N3/08 , F01N3/18 , F01N9/00 , F01N13/02 , F02B1/04 , F02D41/02 , F01N3/28
CPC分类号: B01D53/9481 , B01D53/02 , B01D53/0454 , B01D53/9495 , F01N13/0097 , F01N3/0807 , F01N3/0842 , F01N3/0871 , F01N3/18 , F01N9/00 , F02D41/0275 , B01D2251/30 , B01D2251/40 , B01D2253/25 , B01D2253/342 , B01D2257/404 , B01D2258/01 , B01D2259/40009 , B01D2259/4145 , B01D2259/4566 , B01D53/0415 , F01N2240/18 , F02B1/04 , Y02T10/47
摘要: A NO.sub.x absorbent (18) which absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (18) is lean and releases the absorbed NO.sub.x when the oxygen concentration of the exhaust gas flowing into the NO.sub.x absorbent (18) is lowered, is arranged in the exhaust passage of the engine. The amount of alkali metals, alkali-earth metals or rare-earth metals contained in the NO.sub.x absorbent (18) positioned on the downstream side, is made lower than the amount of alkali metals, alkali-earth metals or rare-earth metals contained in the NO.sub.x absorbent (18) positioned on the upstream side, to increase a reducing ability of the NO.sub.x absorbent (18) positioned on the downstream side as compared to the reducing ability of the NO.sub.x absorbent (18) positioned on the upstream side.
摘要翻译: PCT No.PCT / JP92 / 01710 Sec。 371日期:1993年8月26日 102(e)日期1993年8月26日PCT提交1992年12月25日PCT公布。 WO93 / 12863 PCT出版物 日期1997年7月8日。当流入NOx吸收剂(18)的废气的空燃比是稀的时吸收NOx的NOx吸收剂(18),并且当废气的氧浓度 流入NOx吸收剂(18)的流量降低,设置在发动机的排气通道内。 使位于下游侧的NOx吸收剂(18)中所含的碱金属,碱土金属或稀土类金属的量比含有的碱金属,碱土金属或稀土金属的量少 位于上游侧的NOx吸收剂(18),与位于上游侧的NOx吸收剂(18)的还原能力相比,能够提高位于下游侧的NOx吸收剂(18)的还原能力。
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公开(公告)号:US5313792A
公开(公告)日:1994-05-24
申请号:US947663
申请日:1992-09-18
申请人: Kenji Katoh , Satoshi Iguchi , Tetsuro Kihara
发明人: Kenji Katoh , Satoshi Iguchi , Tetsuro Kihara
CPC分类号: B01D53/945 , B01D53/9477 , F01N13/009 , F01N13/0097 , F01N3/20 , F01N2370/04 , F01N2510/063 , Y02T10/22
摘要: An exhaust gas purification system includes a transition metal/zeolite first catalyst, a three-way second catalyst, and a noble metal-type third catalyst arranged in that order in the direction of exhaust gas flow in an exhaust conduit of an internal combustion engine capable of fuel combustion at lean air-fuel ratios. NOx which has not been purified by the transition metal/zeolite first catalyst is oxidized by the three-way second catalyst into NO.sub.2, which the noble metal-type third catalyst can easily decompose into N.sub.2 and O.sub.2.
摘要翻译: 排气净化系统包括过渡金属/沸石第一催化剂,三向第二催化剂和贵金属型第三催化剂,其依次排列在排气管内的内燃机的排气管道中, 的燃料燃烧在稀薄的空气 - 燃料比。 未被过渡金属/沸石第一催化剂净化的NOx被三元第二催化剂氧化成NO2,贵金属型第三催化剂容易分解成N 2和O 2。
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14.
公开(公告)号:US5951956A
公开(公告)日:1999-09-14
申请号:US391841
申请日:1995-02-17
申请人: Hideaki Muraki , Motohisa Saiki , Mariko Adachi , Shinichi Matsumoto , Takaaki Kanazawa , Kenji Katoh , Satoshi Iguchi , Tetsuro Kihara , Syuji Tateishi , Koichi Kasahara
发明人: Hideaki Muraki , Motohisa Saiki , Mariko Adachi , Shinichi Matsumoto , Takaaki Kanazawa , Kenji Katoh , Satoshi Iguchi , Tetsuro Kihara , Syuji Tateishi , Koichi Kasahara
CPC分类号: B01D53/945 , B01J23/10 , B01J23/58 , B01J23/63 , B01J37/0242 , Y02T10/22
摘要: A catalyst for purifying an exhaust gas for simultaneously removing carbon monoxide, hydrocarbons and nitrogen oxides contained in the exhaust gas under an oxygen rich atmosphere, comprising a carrier composed of a porous material, and barium oxide, lanthanum oxide and platinum supported on the carrier, and a method for purifying an exhaust gas by bringing the exhaust gas under an oxygen rich atmosphere into contact with the above-mentioned catalyst.
摘要翻译: 一种用于净化排气的催化剂,用于同时除去在富氧气氛下包含在废气中的一氧化碳,烃和氮氧化物,其包括由多孔材料构成的载体和负载在载体上的氧化钡,氧化镧和铂, 以及通过使排气在富氧气氛下与上述催化剂接触来净化废气的方法。
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15.
公开(公告)号:US5702675A
公开(公告)日:1997-12-30
申请号:US571638
申请日:1995-12-13
IPC分类号: B01D53/86 , B01D53/94 , B01J23/56 , B01J23/58 , B01J23/63 , B01J37/02 , F01N3/08 , B01D53/92
CPC分类号: B01D53/9481 , B01D53/945 , B01J23/58 , B01J23/63 , B01J37/0244 , F01N3/0842 , Y02T10/22
摘要: A catalyst for purifying exhaust gases, which is composed of a catalyst substrate, a first porous support layer supporting barium as a NOx-occluding material and palladium, which is formed on the catalyst support, and a second porous support layer supporting platinum, which is formed on the first porous support layer. Platinum efficiently oxidizes nitrogen monoxide to be converted into nitrogen dioxide. Palladium is supported in a highly dispersed state even after endurance to act as inlet and outlet of barium for nitrogen dioxide or the like, whereby absorption and emission of nitrogen oxides can be performed smoothly, and accordingly, the purification performance for nitrogen oxides is improved.
摘要翻译: 一种用于净化废气的催化剂,其由催化剂基质,形成在催化剂载体上的作为NOx吸留材料的钡的第一多孔载体层和钯构成,以及第二多孔载体, 形成在第一多孔支撑层上。 铂有效地氧化一氧化氮以转化为二氧化氮。 即使在耐久性之后钯也可以作为二氧化氮等的钡和钡的入口和出口而被支撑在高分散状态,从而可以顺利地进行氮氧化物的吸收和释放,从而提高氮氧化物的净化性能。
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公开(公告)号:US6083467A
公开(公告)日:2000-07-04
申请号:US17027
申请日:1998-02-02
申请人: Shinichi Takeshima , Toshiaki Tanaka , Tetsuya Yamashita , Satoshi Iguchi , Katsuhiko Wakabayashi , Masahiro Kishida
发明人: Shinichi Takeshima , Toshiaki Tanaka , Tetsuya Yamashita , Satoshi Iguchi , Katsuhiko Wakabayashi , Masahiro Kishida
IPC分类号: B01D53/94 , B01J23/42 , B01J23/46 , B01J33/00 , B01J35/00 , B01J35/10 , B01J37/02 , B01J8/02
CPC分类号: B01D53/945 , B01J35/0013 , B01J37/0215 , Y02T10/22
摘要: An exhaust gas purifying catalyst in which catalytic activation particles 3 composed of a catalytic element or its compound are carried on a carrier 1. The catalytic activation particles 3, as carried on the carrier 1 and exposed to the outside of the carrier 1, are coated with the carrier 1 by 20 to 90% of their whole surface area. Also disclosed is a process for producing the exhaust gas purifying catalyst.
摘要翻译: 将由催化剂元素或其化合物构成的催化活化粒子3载持在载体1上的废气净化催化剂。载体1上载持并暴露于载体1的外部的催化活化粒子3被涂布 载体1占其整个表面积的20至90%。 还公开了一种废气净化催化剂的制造方法。
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公开(公告)号:US5911960A
公开(公告)日:1999-06-15
申请号:US544260
申请日:1995-10-17
申请人: Naoto Miyoshi , Shinichi Matsumoto , Tsuneyuki Tanizawa , Satoshi Iguchi , Toshiaki Tanaka , Shinichi Takeshima , Takaaki Kanazawa , Takahiro Hayashi , Motohisa Saiki , Kazuhiko Dohmae , Kiyoshi Yamazaki , Tadashi Suzuki , Koichi Kasahara , Syuji Tateishi
发明人: Naoto Miyoshi , Shinichi Matsumoto , Tsuneyuki Tanizawa , Satoshi Iguchi , Toshiaki Tanaka , Shinichi Takeshima , Takaaki Kanazawa , Takahiro Hayashi , Motohisa Saiki , Kazuhiko Dohmae , Kiyoshi Yamazaki , Tadashi Suzuki , Koichi Kasahara , Syuji Tateishi
IPC分类号: B01D53/94 , B01J23/58 , B01J23/63 , B01J23/652 , B01J23/656 , B01J23/89 , B01J37/02 , B01D53/60
CPC分类号: B01D53/945 , B01D53/9422 , B01J23/58 , B01J23/63 , B01J23/6522 , B01J23/6562 , B01J23/894 , B01J37/0242 , B01D2255/1021 , B01D2255/1023 , B01D2255/202 , B01D2255/204 , B01D2255/2042 , B01D2255/2063 , B01D2255/2065 , B01D2255/2073 , B01D2255/20738 , B01D2255/20746 , B01D2255/20753 , B01D2255/91 , Y02T10/22
摘要: A catalyst for purifying exhaust gases includes a porous support, at least one catalyst ingredient selected from Pt and Pd, and additional ingredients including (1) at least two rare-earth elements including La, (2) at least one rare-earth element including La and at least one transition element selected from Fe, Ni, Co and Mn, (3) at least two alkali metals, (4) at least one alkali metal and at least one rare-earth element including La, (5) at least one alkali metal and at least one transition element selected from Fe, Ni, Co and Mn, (6) at least two alkaline-earth metals, (7) at least one alkaline-earth metal and at least one rare-earth element including La, or (8) Ba, Li, La, Ce and Zr. A process for purifying an exhaust gas, by contacting the catalyst with an exhaust gas, is also provided.
摘要翻译: 用于净化废气的催化剂包括多孔载体,至少一种选自Pt和Pd的催化剂成分,以及另外的成分,包括(1)至少两种稀土元素,包括La,(2)至少一种稀土元素,包括 La和至少一种选自Fe,Ni,Co和Mn的过渡元素,(3)至少两种碱金属,(4)至少一种碱金属和至少一种包含La的稀土元素,(5)至少 一种碱金属和至少一种选自Fe,Ni,Co和Mn的过渡元素,(6)至少两种碱土金属,(7)至少一种碱土金属和至少一种包含La的稀土元素 ,或(8)Ba,Li,La,Ce和Zr。 还提供了一种通过使催化剂与废气接触来净化废气的方法。
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公开(公告)号:US5437153A
公开(公告)日:1995-08-01
申请号:US193143
申请日:1994-02-14
申请人: Shinichi Takeshima , Toshiaki Tanaka , Satoshi Iguchi , Yasushi Araki , Shinya Hirota , Tomohiro Oda , Fumitada Murakami
发明人: Shinichi Takeshima , Toshiaki Tanaka , Satoshi Iguchi , Yasushi Araki , Shinya Hirota , Tomohiro Oda , Fumitada Murakami
IPC分类号: B01D53/04 , B01D53/86 , B01D53/94 , F01N3/08 , F01N3/20 , F01N9/00 , F01N13/02 , F02B1/04 , F02D41/02 , F02D41/14
CPC分类号: B01D53/9481 , B01D53/0454 , B01D53/8696 , B01D53/9445 , B01D53/9495 , F01N13/009 , F01N3/0842 , F01N3/0871 , F01N9/00 , F01N9/005 , F02D41/027 , F02D41/0275 , F02D41/146 , F02D41/1462 , F02D41/1475 , F01N2240/18 , F01N2250/12 , F01N2390/02 , F01N2550/03 , F01N2570/12 , F01N2610/03 , F01N3/20 , F02B1/04 , F02D2200/0806 , F02D2200/0811 , F02D41/1446 , Y02T10/22 , Y02T10/47
摘要: A NO.sub.x absorbent (17) is disposed in an exhaust passage of an internal combustion engine. This NO.sub.x absorbent (17) absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (17) is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (17) becomes rich. It estimates the amount of NO.sub.x absorbed in the NO.sub.x absorbent (17) from the engine load and the engine rotational speed and when the amount of the estimated NO.sub.x becomes the maximum NO.sub.x absorption capacity of the NO.sub.x absorbent (17), makes the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (17) rich.
摘要翻译: PCT No.PCT / JP93 / 00778 Sec。 371日期1994年2月14日 102(e)1994年2月14日PCT提交1993年6月10日PCT公布。 公开号WO93 / 25806 日期1999年12月23日。NOx吸收剂(17)设置在内燃机的排气通道中。 当NOx流入NOx吸收剂(17)的废气的空燃比是贫的时,该NOx吸收剂(17)吸收NOx,并且当流入NOx吸收剂的废气的空燃比释放吸收的NOx 17)变得富有。 它估计从发动机负荷和发动机转速来吸收NOx吸收剂(17)中的NOx的量,并且当估计的NOx的量成为NOx吸收剂(17)的最大NOx吸收能力时,使空气燃料 流入NOx吸收剂(17)的废气的比例变多。
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公开(公告)号:US5473887A
公开(公告)日:1995-12-12
申请号:US66100
申请日:1993-06-14
申请人: Shinichi Takeshima , Kiyoshi Nakanishi , Satoshi Iguchi , Toshiaki Tanaka , Yasushi Araki , Shinya Hirota , Kiyoshi Kobashi
发明人: Shinichi Takeshima , Kiyoshi Nakanishi , Satoshi Iguchi , Toshiaki Tanaka , Yasushi Araki , Shinya Hirota , Kiyoshi Kobashi
CPC分类号: F02D41/0275 , B01D53/9422 , F01N13/009 , F01N13/0093 , F01N3/0842 , F01N3/101 , F01N2240/18 , F01N2390/02 , F01N2430/06 , F01N2610/03 , F01N3/0871 , F02B1/04 , Y02T10/22
摘要: An NO.sub.x absorbent (18) is disposed in an exhaust passage of an internal combustion engine and the exhaust gas is constantly made to circulate through the NO.sub.x absorbent (18) during the operation of the engine. The NO.sub.x absorbent (18) absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (18) is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (18) becomes the stoichiometric air-fuel ratio or rich. In the majority of the engine operation region, the lean air-fuel mixture is burned in the combustion chamber (3), and the NO.sub.x generated at this time is absorbed into the NO.sub.x absorbent (18). The air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (18) is periodically made the stoichiometric air-fuel ratio or rich, and the NO.sub.x absorbed in the NO.sub.x absorbent (18) is released, and simultaneously reduced.
摘要翻译: PCT No.PCT / JP92 / 01279 Sec。 371日期:1993年6月14日 102(e)日期1993年6月14日PCT提交1992年10月2日PCT公布。 公开号WO93 / 07363 日本1999年04月15日。在内燃机的排气通道中设置有NOx吸收剂(18),并且在发动机运转期间不断地使废气循环通过NOx吸收剂(18)。 当流入NOx吸收剂(18)的排气的空燃比是稀的时,NOx吸收剂(18)吸收NOx,并且当流入NOx吸收剂的废气的空燃比释放吸收的NOx 18)成为化学计量空燃比或浓。 在大多数发动机运转区域,稀燃空气燃料混合物在燃烧室(3)中燃烧,此时产生的NOx被吸收到NOx吸收剂(18)中。 流入NOx吸收剂(18)的废气的空燃比被周期性地变成化学计量空燃比或浓,并且吸收在NOx吸收剂(18)中的NOx被释放,同时减少。
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公开(公告)号:US5433074A
公开(公告)日:1995-07-18
申请号:US97794
申请日:1993-07-26
CPC分类号: F01N3/222 , F01N13/009 , F01N3/0842 , F01N3/0871 , F01N3/18 , F01N3/22 , F01N9/00 , F02D41/0275 , F02D41/1441 , F01N2250/12 , F01N2570/16 , F01N3/20 , Y02T10/47
摘要: An engine comprising an exhaust passage having therein a NO.sub.x absorbent which absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent becomes the stoichiometric air-fuel ratio or rich. A catalyst having an O.sub.2 storage function is arranged in the exhaust passage downstream of the NO.sub.x absorbent. When NO.sub.x is to be released from the NO.sub.x absorbent, the air-fuel ratio of the exhaust gas is made rich to an extent such that the amount of unburned HC and CO is excessive beyond an amount necessary to reduce the whole NO.sub.x.
摘要翻译: 一种发动机,其特征在于,具有排气通路,其内部具有NOx吸收剂,当流入所述NOx吸收剂的废气的空燃比为稀时吸收NOx,并且当排出的废气的空燃比流入 NOx吸收剂成为化学计量空燃比或浓度。 具有O2储存功能的催化剂设置在NOx吸收剂下游的排气通道中。 当要从NOx吸收剂中释放NOx时,使排气的空燃比浓度达到使未燃烧的HC和CO的量过量超过减少整个NOx所需的量的程度。
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