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1. 发明授权

US06289672B1 Exhaust gas purification device for an internal combustion engine 有权
标题翻译：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。

2. 发明授权

US5974793A Exhaust gas purification device for an internal combustion engine 失效
标题翻译：内燃机用废气净化装置
公开(公告)号：US5974793A
公开(公告)日：1999-11-02
申请号：US837933
申请日：1997-04-11
申请人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Koichi Takeuchi , Hiroshi Tanaka , Naohide Fuwa
发明人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Koichi Takeuchi , Hiroshi Tanaka , Naohide Fuwa
IPC分类号： F02B75/10 , B01D53/94 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F01N9/00 , F01N13/02 , F01N13/04 , F02B75/18 , F02D41/00 , F02D41/02 , F02D41/04 , F02D41/14 , F02D41/34 , F02D43/00 , F02D45/00 , F02M25/07 , F02P5/15 , F01N3/00
CPC分类号： F02D41/0082 , B01D53/9454 , B01D53/9495 , F01N13/009 , F01N13/011 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N3/2053 , F01N9/00 , F02D41/1475 , F02M26/15 , F02M26/38 , F01N2250/12 , F01N2430/06 , F01N2610/02 , F02D41/0275 , Y02T10/22 , Y02T10/47
摘要： In an exhaust gas purification device, a No. 1 cylinder of the engine is operated at a rich air-fuel ratio and other cylinders (No. 2 to No. 4) are operated at a lean air-fuel ratio. The exhaust gases from the No. 1 and No. 2 cylinders are mixed with each other to form a rich air-fuel ratio exhaust gas mixture. Further, since the air-fuel ratio of the No. 2 cylinder is lean, the exhaust gas from the No. 2 cylinder contains a relatively large amount of NO.sub.x. This rich air-fuel ratio exhaust gas mixture which contains a relatively large amount of NO.sub.X is supplied to a three-way catalyst. At the three-way catalyst, part of the NO.sub.X in the exhaust gas mixture is converted to NH.sub.3. The exhaust gas mixture flowing out from the three-way catalyst and the lean exhaust gas from the No. 3 and No. 4 flow into a common exhaust gas passage where they mix with each other to form a lean exhaust gas containing NH.sub.3 from the three-way catalyst and NO.sub.X from the No. 3 and No. 4 cylinders. This lean exhaust gas flows into a denitrating catalyst disposed on the common exhaust gas passage in which NO.sub.X in the exhaust gas is reduced by the NH.sub.3.
摘要翻译：在废气净化装置中，发动机的1号气缸以较高的空燃比运转，其他气缸（No.2〜No.4）以稀空燃比运转。来自1号和2号气缸的废气彼此混合，形成浓空气燃料比的废气混合物。此外，由于2缸的空燃比为稀，所以来自2号气缸的废气含有较多的NOx。将含有较多量的NO x的浓空燃比废气混合物供给至三元催化剂。在三元催化剂中，废气混合物中的一部分NO x转化为NH 3。从三元催化剂流出的废气混合物和来自3号和4号的贫废气流入共同的废气通道，在那里它们彼此混合，形成三来自3号和4号气瓶的催化剂和NOX。这种贫废气流入设置在排气中的NO x被NH 3还原的共用排气通道上的脱硝催化剂中。

3. 发明授权

US06345496B1 Method and device for purifying exhaust gas of an engine 有权
标题翻译：用于净化发动机废气的方法和装置
公开(公告)号：US06345496B1
公开(公告)日：2002-02-12
申请号：US09502127
申请日：2000-02-10
申请人： Naohide Fuwa , Hiroshi Tanaka , Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Kouhei Igarashi , Kouichi Takeuchi
发明人： Naohide Fuwa , Hiroshi Tanaka , Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Kouhei Igarashi , Kouichi Takeuchi
IPC分类号： F01N300
CPC分类号： F02D41/1475 , B01D53/8696 , B01D53/9409 , B01D53/9422 , B01D53/9431 , B01D53/9445 , B01D53/9454 , B01D53/9477 , B01D53/9495 , B01D2255/102 , B01D2255/20761 , B01D2255/50 , B01D2255/911 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N3/2053 , F01N9/00 , F01N13/009 , F01N13/011 , F01N13/107 , F01N2240/25 , F01N2250/12 , F01N2570/18 , F01N2610/02 , F01N2610/03 , F02B1/04 , F02D41/027 , F02D41/0275 , F02D41/1443 , Y02T10/22 , Y02T10/24 , Y02T10/47
摘要： An exhaust manifold (7) of an engine (1) is connected to a three way (TW) catalyst (8a), and the TW catalyst (8a) is connected to an NH3 adsorbing and oxidizing (NH3-AO) catalyst (10a). The engine (1) performs the lean and the rich engine operations alternately and repeatedly. When the engine (1) performs the rich operation and thereby the exhaust gas air-fuel ratio of the exhaust gas flowing into the TW catalyst (8a) is made rich, NOx in the inflowing exhaust gas is converted to NH3 in the TW catalyst (8a). The NH3 is then adsorbed in the NH3-AO catalyst (10a). Next, when the engine (1) performs the lean operation and thereby the exhaust gas air-fuel ratio of the exhaust gas flowing into the TW catalyst (8a) is made lean, NOx in the exhausted gas passes through the TW catalyst (8a), and flows into the NH3-AO catalyst (10a). At this time, NH3 adsorbed in the catalyst (10a) is desorbed therefrom, and reduces the inflowing NOx.
摘要翻译：发动机（1）的排气歧管（7）与三通（TW）催化剂（8a）连接，TW催化剂（8a）与NH3吸附和氧化（NH3-AO）催化剂（10a）连接，。发动机（1）交替地重复执行精益和丰富的发动机操作。当发动机（1）进行浓作操作，使流入TW催化剂（8a）的废气的排气空燃比变浓时，在TW催化剂中将流入废气中的NOx转化成NH 3 8a）。然后将NH 3吸附在NH3-AO催化剂（10a）中。接下来，当发动机（1）进行稀薄运转，从而将流入TW催化剂（8a）的废气的排气空燃比变为稀薄时，排出气体中的NOx通过TW催化剂（8a）并流入NH3-AO催化剂（10a）。此时，吸附在催化剂（10a）中的NH 3被脱附，并且减少了流入的NOx。

4. 发明授权

US6133185A Exhaust gas purifying catalyst 失效
标题翻译：废气净化催化剂
公开(公告)号：US6133185A
公开(公告)日：2000-10-17
申请号：US744814
申请日：1996-11-06
申请人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Takaaki Kanazawa , Takahiro Hayashi , Koji Yokota , Yasutaka Nagai
发明人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Takaaki Kanazawa , Takahiro Hayashi , Koji Yokota , Yasutaka Nagai
IPC分类号： B01D53/94 , F01N3/08 , F02B1/04 , F02D41/02 , B01J29/06
CPC分类号： F01N3/10 , B01D53/9418 , B01D53/9495 , F01N13/009 , F01N13/0097 , F01N3/0842 , F01N3/106 , F01N3/108 , B01D2255/1021 , B01D2255/20761 , B01D2255/50 , B01D2255/911 , B01D53/9477 , F01N2240/25 , F01N2250/12 , F01N2370/04 , F01N2570/14 , F02B1/04 , F02D41/0275 , Y02T10/24
摘要： An exhaust gas purifying catalyst, for reducing nitrogen oxides and ammonia in an exhaust gas of an internal combustion engine, in an oxidizing atmosphere, is provided. The exhaust gas purifying catalyst comprises a first catalyst having zeolite carrying platinum and copper thereon. Preferably, the exhaust gas purifying catalyst further comprises a second catalyst having zeolite carrying copper thereon. Preferably, the second catalyst is arranged upstream of the first catalyst, with respect to the exhaust gas flow.
摘要翻译：提供一种用于在氧化气氛中还原内燃机的废气中的氮氧化物和氨的废气净化催化剂。废气净化催化剂包括具有在其上载有铂和铜的沸石的第一催化剂。优选地，废气净化催化剂还包含具有在其上载有铜的沸石的第二催化剂。优选地，第二催化剂相对于废气流布置在第一催化剂的上游。

5. 发明授权

US5964088A Device for purifying exhaust gas of engine 失效
标题翻译：发动机排气净化装置
公开(公告)号：US5964088A
公开(公告)日：1999-10-12
申请号：US822555
申请日：1997-03-19
申请人： Yukio Kinugasa , Takaaki Itou , Koichi Hoshi , Naoto Suzuki , Koichi Takeuchi , Takehisa Yaegashi , Kouhei Igarashi
发明人： Yukio Kinugasa , Takaaki Itou , Koichi Hoshi , Naoto Suzuki , Koichi Takeuchi , Takehisa Yaegashi , Kouhei Igarashi
IPC分类号： F02D43/00 , B01D53/94 , F01N3/08 , F01N3/20 , F01N3/24 , F01N9/00 , F01N13/02 , F02B1/04 , F02D41/02 , F02D41/04 , F02D41/14 , F01N3/00
CPC分类号： F02D41/1443 , B01D53/9431 , B01D53/9495 , F01N13/009 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N9/00 , F01N2240/25 , F01N2250/12 , F01N2560/025 , F01N2560/06 , F01N2610/02 , F01N2610/03 , F02B1/04 , F02D41/0275 , Y02T10/22 , Y02T10/42 , Y02T10/47
摘要： A device for purifying the exhaust gas of an engine having a plurality of cylinders divided into first and second cylinder groups, the first and the second cylinder groups being connected to first and second exhaust passage, respectively, and performing a lean operation, comprises an NH.sub.3 synthesizing catalyst arranged in the first exhaust passage, and an exhaust gas purifying catalyst arranged in an interconnecting passage, which interconnects the first passage downstream of the NH.sub.3 synthesizing catalyst and the second exhaust passage, for purifying the inflowing NO.sub.X and NH.sub.3. An additional engine performing a rich operation is provided and the exhaust gas thereof is fed to the first exhaust gas passage upstream of the NH.sub.3 synthesizing catalyst to make the exhaust gas air-fuel ratio of the exhaust gas flowing into the NH.sub.3 synthesizing catalyst rich, to thereby synthesize NH.sub.3 therein. An amount of NH.sub.3 or NO.sub.X flowing into the exhaust gas purifying catalyst is obtained, and the additional engine is controlled in accordance with the obtained NH.sub.3 or NO.sub.X amount to control the amount of the reducing agent flowing to the exhaust gas purifying catalyst.
摘要翻译：一种用于净化具有分成第一和第二气缸组的多个气缸的发动机的排气的装置，所述第一和第二气缸组分别连接到第一和第二排气通道，并执行精馏操作，包括NH 3 配置在第一排气通道中的合成催化剂和布置在互连通道中的排气净化催化剂，其将NH3合成催化剂下游的第一通道和第二排气通道互连，以净化流入的NO x和NH 3。提供执行富操作的附加发动机，其排气被送入NH 3合成催化剂上游的第一排气通道，使流入NH 3合成催化剂的废气的排气空燃比变浓，至由此合成NH 3。获得流入排气净化催化剂的NH 3或NO X量，根据得到的NH 3或NO X量控制附加发动机，以控制流向废气净化催化剂的还原剂的量。

6. 发明授权

US6047542A Method and device for purifying exhaust gas of engine 失效
标题翻译：发动机排气净化方法及装置
公开(公告)号：US6047542A
公开(公告)日：2000-04-11
申请号：US68422
申请日：1998-06-29
申请人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Kouichi Takeuchi
发明人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Kouichi Takeuchi
IPC分类号： F02D43/00 , B01D53/86 , B01D53/94 , B01J23/40 , B01J23/70 , B01J29/04 , F01N3/08 , F01N3/10 , F01N3/20 , F01N3/24 , F01N3/28 , F01N13/02 , F01N13/04 , F02B1/04 , F02D41/02 , F02D41/04 , F02D41/14 , F01N3/00
CPC分类号： F01N3/2073 , B01D53/8696 , B01D53/9431 , B01D53/9495 , F01N13/009 , F01N13/011 , F01N13/107 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N3/2053 , F02D41/027 , F02D41/1443 , F02D41/1475 , F01N2240/25 , F01N2250/12 , F01N2610/02 , F02B1/04 , F02D41/0275 , Y02T10/22
摘要： An engine (1) has first and second cylinder groups (1a) and (1b). The first cylinder group (1a) is connected to a three way (TW) catalyst (8a). The second group (1b) and the TW catalyst (8a) are connected, via an interconnecting duct (13) to an NH.sub.3 adsorbing and oxidizing (NH.sub.3 -AO) catalyst (14a). The first group (1a) performs the rich operation, and the second group (1b) performs the lean operation. In the TW catalyst (8a), NO.sub.x exhausted from the first group (1a) is converted to NH.sub.3, and the NH.sub.3 reduces the NO.sub.x exhausted from the second group (1b) in the NH.sub.3 -AO catalyst (14a). A NO.sub.x occluding and reducing (NO.sub.x -OR) catalyst (11a) is arranged in the exhaust passage between the second group (1b) and the interconnecting duct (13), to thereby suppress the NO.sub.x amount flowing into the NH.sub.3 -AO catalyst (14a).
摘要翻译： PCT No.PCT / JP96 / 03332 Sec。 371日期1998年6月29日第 102（e）1998年6月29日PCT PCT 1996年11月13日PCT公布。公开号WO97 / 19262 日期1997年5月29日发动机（1）具有第一和第二气缸组（1a）和（1b）。第一气缸组（1a）连接到三通（TW）催化剂（8a）。第二组（1b）和TW催化剂（8a）通过互连导管（13）连接到NH 3吸附和氧化（NH3-AO）催化剂（14a）。第一组（1a）执行丰富操作，第二组（1b）执行精简操作。在TW催化剂（8a）中，从第一组（1a）排出的NOx转化为NH 3，并且NH 3减少在NH3-AO催化剂（14a）中从第二组（1b）排出的NOx。在第二组（1b）和互连管（13）之间的排气通道中设置有NOx吸留还原（NOx-OR）催化剂（11a），从而抑制流入NH 3 -A AO催化剂（14a）的NOx量）。

7. 发明授权

US5782087A Device for purifying exhaust gas of an engine 失效
标题翻译：用于净化发动机废气的装置
公开(公告)号：US5782087A
公开(公告)日：1998-07-21
申请号：US746056
申请日：1996-11-06
申请人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Toshiaki Tanaka
发明人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Toshiaki Tanaka
IPC分类号： F02D45/00 , B01D53/86 , B01D53/94 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F01N9/00 , F01N13/02 , F02B1/04 , F02D41/04
CPC分类号： F01N3/0842 , B01D53/9409 , B01D53/9436 , B01D53/9495 , F01N13/009 , F01N3/0871 , F01N3/20 , F01N9/00 , F01N2250/12 , F01N2370/04 , F02B1/04 , Y02T10/22 , Y02T10/47
摘要： An exhaust manifold of an engine is connected to a three way (TW) catalyst, and the TW catalyst is connected to an NH.sub.3 adsorbing and oxidizing (NH.sub.3 -AO) catalyst, such as the Cu-zeolite catalyst. The engine performs the lean and the rich operations alternately and repeatedly. When the engine performs the rich operation, the TW catalyst synthesizes NH.sub.3 from NO.sub.x in the inflowing exhaust gas, and the NH.sub.3 is then adsorbed in the NH.sub.3 -AO catalyst. Next, when the engine performs the lean operation, NO.sub.x passes through the TW catalyst, and the adsorbed NH.sub.3 is desorbed and reduces the inflowing NO.sub.x. When the rich operation is in process, or is to be started, the exhaust gas temperature flowing into the NH.sub.3 -AO catalyst is detected. If the temperature is equal to or higher than the upper threshold representing the rich endurance temperature, the lean or the stoichiometric operation is performed.
摘要翻译：发动机的排气歧管连接到三通（TW）催化剂，TW催化剂连接到NH 3吸附和氧化（NH3-AO）催化剂如Cu-沸石催化剂上。发动机交替重复执行精益和丰富的操作。当发动机进行浓缩操作时，TW催化剂在流入的废气中从NOx合成NH 3，然后NH 3被吸附在NH3-AO催化剂中。接下来，当发动机进行稀薄运转时，NOx通过TW催化剂，吸附的NH 3被解吸并减少流入的NOx。当富运行正在进行或正在启动时，检测流入NH3-AO催化剂的废气温度。如果温度等于或高于表示富耐久温度的上限阈值，则执行稀薄或化学计量操作。

8. 发明授权

US5778667A Method and a device for purifying combustion exhaust gas 失效
标题翻译：燃烧废气净化方法和装置
公开(公告)号：US5778667A
公开(公告)日：1998-07-14
申请号：US876608
申请日：1997-06-16
申请人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki
发明人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki
IPC分类号： B01D53/94 , F01N3/08 , F01N3/20 , F01N3/24 , F01N9/00 , F01N13/02 , F01N13/04 , F02D41/14 , F01N3/36
CPC分类号： F01N3/2073 , B01D53/9481 , B01D53/9495 , F01N13/009 , F01N13/011 , F01N3/0842 , F01N3/0871 , F01N3/2053 , F01N9/00 , B01D2251/2062 , B01D53/9418 , B01D53/945 , F01N2240/25 , F01N2250/12 , F01N2610/02 , Y02T10/22 , Y02T10/24 , Y02T10/47
摘要： In the present invention, the No. 1 cylinder of an engine is connected to a first exhaust passage and the No. 2 to No. 4 cylinders are connected to a second exhaust passage. A three-way catalyst and a NO.sub.X absorbent are disposed in the first and second exhaust passage, respectively. A denitrating catalyst is disposed in a common exhaust passage to which the first and second exhaust passage merge. The NO.sub.X absorbent absorbs NO.sub.X when the No. 2 to No. 4 cylinders are operated at a lean air-fuel ratio, and is regenerated, i.e., releases and reduces the absorbed NO.sub.X when the No. 2 to No. 4 cylinders are operated at a rich air-fuel ratio. However, NO.sub.X, without being reduced, is released from the NO.sub.X absorbent during a short period at the beginning of the regenerating operation. In the present invention, the No. 1 cylinder is operated at a rich air-fuel ratio during the short period at the beginning of the regenerating operation in order to produce NH.sub.3 at the three-way catalyst. Therefore, when NO.sub.X without being reduced is released from the NO.sub.X absorbent and flows into the denitrating catalyst on the common exhaust passage, NH.sub.3 produced at the three-way catalyst is also supplied to the denitrating catalyst. Thus, NO.sub.X released from the NO.sub.X absorbent at the beginning of the regenerating operation is reduced at the denitrating catalyst by NH.sub.3 produced at the three-way catalyst.
摘要翻译：在本发明中，发动机的1号缸与第一排气通路连接，第2〜4缸与第2排气通路连接。分别在第一和第二排气通道中设置三元催化剂和NOX吸收剂。脱气催化剂设置在第一和第二排气通道合流的公共排气通道中。当2号至4号气缸以稀薄的空燃比运行时，NOX吸收剂吸收NOX，并且再生时，即当第2号至第4号气缸运行时释放并减少吸收的NOX 丰富的空燃比。然而，在再生操作开始时的短时间内，NOX不被还原，从NOX吸收剂中释放出来。在本发明中，为了在三元催化剂下生成NH 3，在再生运转开始的短时间内，1号气缸以浓空燃比运转。因此，当没有还原的NO x从NOX吸收剂中释放并流入共用排气通道的脱硝催化剂时，在三元催化剂上生成的NH 3也被供给到脱硝催化剂。因此，在再生操作开始时从NOX吸收剂释放的NOX在脱氮催化剂下通过在三元催化剂下产生的NH 3而降低。

9. 发明授权

US6119452A Device for purifying exhaust gas of internal combustion engine 失效
标题翻译：内燃机废气净化装置
公开(公告)号：US6119452A
公开(公告)日：2000-09-19
申请号：US68684
申请日：1998-05-13
申请人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Toshiaki Tanaka , Naoto Miyoshi
发明人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Toshiaki Tanaka , Naoto Miyoshi
IPC分类号： B01D53/86 , B01D53/94 , F01N3/08 , F01N3/20 , F01N13/02 , F01N13/04 , F02B1/04 , F02D41/02 , F02D41/14 , F01N3/00
CPC分类号： F01N3/2073 , B01D53/8696 , B01D53/9431 , B01D53/9454 , B01D53/9495 , F01N13/009 , F01N13/011 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N3/2053 , F02D41/027 , F02D41/1443 , F02D41/1475 , F01N2240/25 , F01N2250/12 , F01N2610/02 , F02B1/04 , F02D41/0275 , Y02T10/22
摘要： A three-way catalyst (8a) is connected to a first cylinder group 1a. The exhaust gas of the first cylinder group (1a), which has passed through the three-way catalyst (8a), and the exhaust gas of a second cylinder group (1b) are introduced to an exhaust gas purifying catalyst (14). The second cylinder group (1b) performs the lean operation. The first cylinder group (1a) performs the rich operation to synthesize NH.sub.3 from NO.sub.X in the exhaust gas of the first cylinder group (1a) in the three-way catalyst (8a). In the exhaust gas purifying catalyst (14), NO.sub.X in the exhaust gas of the second cylinder group 1b is purified by NH.sub.3 from the three-way catalyst (8a). The amount of HC flowing to the three-way catalyst (8a) is obtained. When the HC amount exceeds a predetermined amount, the first cylinder group 1a must perform the lean operation temporarily, to thereby maintain the excellent catalytic activity of the three-way catalyst (8a).
摘要翻译： PCT No.PCT / JP96 / 03288 Sec。 371日期1998年5月13日 102（e）日期1998年5月13日PCT 1996年11月8日PCT PCT。公开号WO97 / 19261 日期1997年5月29日将三元催化剂（8a）连接到第一气缸组1a。已经通过三元催化剂（8a）的第一气缸组（1a）的排气和第二气缸组（1b）的排气被引入废气净化催化剂（14）。第二气缸组（1b）执行精馏操作。第一气缸组（1a）在三元催化剂（8a）中进行第一气缸组（1a）的排气中的NO x的富NH操作。在排气净化催化剂（14）中，第三气缸组1b的废气中的NO x从三元催化剂（8a）中被NH 3净化。获得流向三元催化剂（8a）的HC量。当HC量超过预定量时，第一气缸组1a必须暂时进行稀薄运转，从而保持三元催化剂（8a）的极好的催化活性。

10. 发明授权

US06336320B1 Exhaust gas purification device for an internal combustion engine 有权
标题翻译：内燃机用废气净化装置
公开(公告)号：US06336320B1
公开(公告)日：2002-01-08
申请号：US09345406
申请日：1999-07-01
申请人： Hiroshi Tanaka , Toshio Tanahashi , Naoto Suzuki
发明人： Hiroshi Tanaka , Toshio Tanahashi , Naoto Suzuki
IPC分类号： F01N300
CPC分类号： F01N3/0842 , F01N3/0814 , F01N9/00 , F01N13/009 , F01N13/011 , F01N2250/12 , F01N2570/16 , F02D41/0275 , F02D41/1462 , F02D41/1465 , F02D41/3011 , F02D41/3029 , F02D41/402 , F02D41/405 , F02D2200/0806 , F02D2200/0814 , F02D2200/0818 , Y02T10/44 , Y02T10/47
摘要： Start catalysts (SCs) having an O2 storage function are disposed in an exhaust gas passage of an internal combustion engine, and an NOx occluding and reducing catalyst is disposed in the exhaust gas passages downstream of the SCs. NOx in the exhaust gas is absorbed by the NOx occluding and reducing catalyst when the engine is in operation at a lean air-fuel ratio. When NOx is to be released, the engine is operated at a rich air-fuel ratio so that exhaust gas having a rich air-fuel ratio flows into the SCs and into the NOx occluding and reducing catalyst. An electronic control unit (ECU) executes the secondary fuel injection that does not contribute to the combustion in the expansion stroke or in the exhaust stroke of each cylinder by using a direct cylinder fuel injection valve at the time when the engine operating air-fuel ratio is to be changed from a lean air-fuel ratio operation to a rich air-fuel ratio, so that exhaust gas having a rich air-fuel ratio flows into the SC and that oxygen stored in the SC is released. At the time of changing over the air-fuel ratio, therefore, the air-fuel ratio is changed from the lean side to the rich side without delay, eliminating such an occurrence that NOx is released from the NOx occluding and reducing catalyst without being purified at the time of changing the air-fuel ratio.
摘要翻译：具有O 2储存功能的起始催化剂（SC）被设置在内燃机的排气通道中，并且NOx吸留还原催化剂设置在SC的下游的排气通道中。当发动机以稀薄的空燃比运转时，废气中的NOx被NOx吸留和还原催化剂吸收。当要释放NOx时，发动机以丰富的空燃比运转，使得具有浓空燃比的废气流入SC并进入NOx吸留和还原催化剂。电子控制单元（ECU）通过在发动机工作空燃比（ECU）中使用直接气缸燃料喷射阀来执行对膨胀行程或每个气缸的排气冲程中的燃烧无贡献的二次燃料喷射从稀空燃比操作变为浓空燃比，使得具有浓空燃比的废气流入SC，并且释放存储在SC中的氧。因此，在空燃比变化的时候，空燃比从稀侧变为富侧无效，消除了NOx从NO X吸留还原催化剂释放而不被净化的情况在改变空燃比的时候。

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