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公开(公告)号：EP1064985B1
公开(公告)日：2008-02-20
申请号：EP00113797.5
申请日：2000-06-29
CPC分类号： B01J23/63 , B01D53/9431 , B01J23/56
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公开(公告)号：EP1064985A2
公开(公告)日：2001-01-03
申请号：EP00113797.5
申请日：2000-06-29
IPC分类号： B01D53/94
CPC分类号： B01J23/63 , B01D53/9431 , B01J23/56
摘要： An exhaust gas purifying system for an internal combustion engine of an automotive vehicle. The exhaust gas purifying system comprises an exhaust gas composition regulating device for producing a low HC concentration reducing agent in a lean exhaust gas atmosphere where air-fuel ratio is leaner than a stoichiometric value. The exhaust gas composition regulating device is disposed in an exhaust gas passageway of the engine. The low HC concentration reducing agent is low in concentration of hydrocarbons to have an exhaust gas composition having a volume ratio of NOx/HC not less than 50 in the exhaust gas passageway immediately downstream of the exhaust gas composition regulating device. Additionally, a NOx treating catalyst is disposed in the exhaust gas passageway and located downstream of the exhaust gas composition regulating device. The NOx treating catalyst is arranged to reduce NOx in the presence of the low HC concentration reducing agent supplied from the exhaust gas composition regulating device. The exhaust gas composition of the low HC concentration reducing agent is obtained in the exhaust gas passageway immediately upstream of the NOx reducing catalyst.
摘要翻译： 一种用于机动车辆的内燃机的废气净化系统。 废气净化系统包括用于在空燃比稀于化学计量值的贫废气气氛中产生低HC浓度还原剂的废气成分调节装置。 排气成分调节装置设置在发动机的排气通道中。 低HC浓度降低剂的碳氢化合物浓度低，在废气成分调整装置紧下游的排气通路中具有NOx / HC体积比不小于50的排气组成。 此外，NOx处理催化剂设置在排气通道中并位于排气成分调节装置的下游。 NOx处理催化剂布置成在从排气成分调节装置供应的低HC浓度还原剂存在下还原NOx。 低NOx浓度降低剂的废气组成在紧邻NOx还原催化剂上游的废气通路中获得。
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公开(公告)号：EP1094206B1
公开(公告)日：2006-05-17
申请号：EP00123007.7
申请日：2000-10-23
发明人： Yamamoto, Shinji , Kanesaka, Hiroyuki , Onodera, Hitoshi , Hanaki, Yasunari , Suga, Katsuo , Morita, Hiroshi , Hiramoto, Yoshiaki , Kaneko, Hiroaki
CPC分类号： B01J35/0006 , B01D53/8631 , B01D53/8696 , B01D53/9431 , B01D53/9495 , B01J23/58 , B01J23/60 , B01J23/63 , B01J37/0244 , B01J37/0248 , F01N3/0814 , F01N3/0842 , F01N3/206 , F01N13/009 , F01N2240/30 , F01N2330/06 , F01N2610/04 , F01N2610/08 , F02D41/0275
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公开(公告)号：EP1094206A3
公开(公告)日：2003-03-12
申请号：EP00123007.7
申请日：2000-10-23
发明人： Yamamoto, Shinji , Kanesaka, Hiroyuki , Onodera, Hitoshi , Hanaki, Yasunari , Suga, Katsuo , Morita, Hiroshi , Hiramoto, Yoshiaki , Kaneko, Hiroaki
CPC分类号： B01J35/0006 , B01D53/8631 , B01D53/8696 , B01D53/9431 , B01D53/9495 , B01J23/58 , B01J23/60 , B01J23/63 , B01J37/0244 , B01J37/0248 , F01N3/0814 , F01N3/0842 , F01N3/206 , F01N13/009 , F01N2240/30 , F01N2330/06 , F01N2610/04 , F01N2610/08 , F02D41/0275
摘要： An exhaust gas purifying system for an automotive internal combustion engine comprises a NOx treating catalyst for reducing NOx disposed in an exhaust gas passageway of a combustion device, to reduce NOx in presence of reducing components in exhaust gas. Additionally, a hydrogen enriching device is disposed upstream of the NOx treating catalyst with respect to flow of exhaust gas from the combustion device and arranged to increase a ratio of hydrogen to total reducing components in at least one of combustion gas and exhaust gas so as to meet relations represented by following formulae (1) and (2), when reduction of NOx is carried out by the NOx treating catalyst:[H2 / TR]d > [H2 / TR]u[H2 / TR]d ≥ 0.3 where [H2 / TR]u is a ratio between a concentration [H2]u of hydrogen and a concentration [TR]u of total reducing components in at least one of exhaust gas in the exhaust gas passageway upstream of the hydrogen enriching device and combustion gas in a state before undergoing the hydrogen ratio increasing by the hydrogen enriching means; and [H2 / TR]d is a ratio between a concentration [H2]d of hydrogen and a concentration [TR]d of total reducing components in exhaust gas in the exhaust gas passageway upstream of the NOx treating catalyst and downstream of the hydrogen enriching device.
摘要翻译： 用于汽车内燃机的排气净化系统包括用于还原布置在燃烧装置的排气通道中的NOx的NOx处理催化剂，以在排气中的还原成分存在的情况下还原NOx。 另外，关于来自燃烧装置的排气的流动，在NO x处理催化剂的上游设置富氢装置，并且设置成增加燃烧气体和排气中的至少一个中的氢与全部还原成分的比率，以便 当由NO X处理催化剂进行NO X还原时，满足由下式（1）和（2）表示的关系：[H 2 / TR] d> [H 2 / H2 / TR] u是氢浓度[H2] u与富氢装置上游的废气通道中的废气中的至少一个中的总还原组分的浓度[TR] u之间的比率， 通过氢富集装置使氢比增加之前的状态; [H 2 / TR] d是氢处理浓度[H 2] d与NOx处理催化剂上游废气通道中排气中总还原成分浓度[TR] d之间的比率， 设备。
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公开(公告)号：EP1094206A2
公开(公告)日：2001-04-25
申请号：EP00123007.7
申请日：2000-10-23
发明人： Yamamoto, Shinji , Kanesaka, Hiroyuki , Onodera, Hitoshi , Hanaki, Yasunari , Suga, Katsuo , Morita, Hiroshi , Hiramoto, Yoshiaki , Kaneko, Hiroaki
CPC分类号： B01J35/0006 , B01D53/8631 , B01D53/8696 , B01D53/9431 , B01D53/9495 , B01J23/58 , B01J23/60 , B01J23/63 , B01J37/0244 , B01J37/0248 , F01N3/0814 , F01N3/0842 , F01N3/206 , F01N13/009 , F01N2240/30 , F01N2330/06 , F01N2610/04 , F01N2610/08 , F02D41/0275
摘要： An exhaust gas purifying system for an automotive internal combustion engine comprises a NOx treating catalyst for reducing NOx disposed in an exhaust gas passageway of a combustion device, to reduce NOx in presence of reducing components in exhaust gas. Additionally, a hydrogen enriching device is disposed upstream of the NOx treating catalyst with respect to flow of exhaust gas from the combustion device and arranged to increase a ratio of hydrogen to total reducing components in at least one of combustion gas and exhaust gas so as to meet relations represented by following formulae (1) and (2), when reduction of NOx is carried out by the NOx treating catalyst:
[H2 / TR]d > [H2 / TR]u (1)
[H2 / TR]d ≥ 0.3 (2)
where [H2 / TR]u is a ratio between a concentration [H2]u of hydrogen and a concentration [TR]u of total reducing components in at least one of exhaust gas in the exhaust gas passageway upstream of the hydrogen enriching device and combustion gas in a state before undergoing the hydrogen ratio increasing by the hydrogen enriching means; and [H2 / TR]d is a ratio between a concentration [H2]d of hydrogen and a concentration [TR]d of total reducing components in exhaust gas in the exhaust gas passageway upstream of the NOx treating catalyst and downstream of the hydrogen enriching device.摘要翻译： 用于汽车内燃机的排气净化系统包括用于还原布置在燃烧装置的排气通道中的NOx的NOx处理催化剂，以在排气中的还原成分存在的情况下还原NOx。 另外，关于来自燃烧装置的排气的流动，在NO x处理催化剂的上游设置富氢装置，并且设置成增加燃烧气体和排气中的至少一个中的氢与全部还原成分的比率，以便 （1）和（2）表示的关系，当由NO x处理催化剂进行NO x还原时：[H 2 / TR] d（1）[H 2 / TR] 0.3 ...（2）其中[H2 / TR] u是氢气浓度[H2] u与氢气上游排气通道中至少一个排气中总还原组分的浓度[TR] u之间的比率 使富氢装置和燃烧气体处于氢比率增加之前的状态; [H 2 / TR] d是氢处理浓度[H 2] d与NOx处理催化剂上游废气通道中排气中总还原成分浓度[TR] d之间的比率， 设备。
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公开(公告)号：EP1064985A3
公开(公告)日：2001-01-31
申请号：EP00113797.5
申请日：2000-06-29
CPC分类号： B01J23/63 , B01D53/9431 , B01J23/56
摘要： An exhaust gas purifying system for an internal combustion engine of an automotive vehicle. The exhaust gas purifying system comprises an exhaust gas composition regulating device for producing a low HC concentration reducing agent in a lean exhaust gas atmosphere where air-fuel ratio is leaner than a stoichiometric value. The exhaust gas composition regulating device is disposed in an exhaust gas passageway of the engine. The low HC concentration reducing agent is law in concentration of hydrocarbons to have an exhaust gas composition having a volume ratio of NOx/HC not less than 50 in the exhaust gas passageway immediately downstream of the exhaust gas composition regulating device. Additionally, a NOx treating catalyst is disposed in the exhaust gas passageway and located downstream of the exhaust gas composition regulating device. The NOx treating catalyst is arranged to reduce NOx in the presence of the low HC concentration reducing agent supplied from the exhaust gas composition regulating device. The exhaust gas composition of the low HC concentration reducing agent is obtained in the exhaust gas passageway immediately upstream of the NOx reducing catalyst.
摘要翻译： 一种用于机动车辆的内燃机的废气净化系统。 废气净化系统包括用于在空燃比稀于化学计量值的贫废气气氛中产生低HC浓度还原剂的废气成分调节装置。 排气成分调节装置设置在发动机的排气通道中。 低HC浓度降低剂是指在排气成分调整装置的紧下游侧的排气通路中，碳氢化合物的浓度定律为排气成分的NO x / HC的体积比为50以上。 此外，NOx处理催化剂设置在排气通道中并位于排气成分调节装置的下游。 NOx处理催化剂布置成在从排气成分调节装置供应的低HC浓度还原剂存在下还原NOx。 低NOx浓度降低剂的废气组成在紧邻NOx还原催化剂上游的废气通路中获得。
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