公开(公告)号：US6099644A

公开(公告)日：2000-08-08

申请号：US96359

申请日：1998-06-12

申请人： Wolfgang Zahn ,  Gunter Loose ,  Axel Hirshmann

发明人： Wolfgang Zahn ,  Gunter Loose ,  Axel Hirshmann

IPC分类号： B01J37/02 ,  B01J38/68 ,  B01J23/00

CPC分类号： B01J38/68 ,  B01J37/0232 ,  Y10S502/514

摘要： A process serves for recoating a deactivated catalyst coating of a catalyst for converting harmful constituents from the exhaust gas of an internal combustion engine, particularly in a motor vehicle. In this process, washcoat and/or noble metal compounds are sprayed by means of an aerosol into the catalyst. The noble metal compounds are subsequently brought into their elemental state by means of a reducing medium flowing through the catalyst, after which the washcoat applied is dried by heat treatment or calcination. In an apparatus for carrying out the process, a first line for a carrier gas and a second line for the washcoat and/or the noble metal compounds are provided. The first line is arranged at least partly in a region before the catalyst within the second line and at its ends nearest the catalyst is provided with an atomization device. The second line opens into the catalyst, with there being provided after the catalyst a third line which opens into a separator from which the first and the second lines lead away.

摘要翻译： 一种方法用于重新涂覆催化剂的失活的催化剂涂层，用于转化来自内燃机，特别是机动车辆的废气的有害成分。 在该方法中，将修补基面涂层和/或贵金属化合物通过气溶胶喷射到催化剂中。 贵金属化合物随后通过流过催化剂的还原介质进入其元素状态，之后涂覆的修补基面涂层通过热处理或煅烧进行干燥。 在用于实施该方法的装置中，提供了用于载气的第一线和用于修补基面涂层和/或贵金属化合物的第二线。 第一管线至少部分地布置在第二管线内的催化剂之前的区域中，并且其最靠近催化剂的端部设置有雾化装置。 第二条线进入催化剂，在催化剂之后设置第三条线，该第三条线通向第一和第二条线路从该分离器通过。

公开(公告)号：US5613359A

公开(公告)日：1997-03-25

申请号：US368498

申请日：1995-01-04

申请人： Wolfgang Zahn ,  Gunter Loose ,  Erwin Strohmer

发明人： Wolfgang Zahn ,  Gunter Loose ,  Erwin Strohmer

IPC分类号： F01N3/08 ,  F01N3/20 ,  F01N3/30 ,  F01N13/02

CPC分类号： F01N3/0835 ,  F01N13/009 ,  F01N3/0878 ,  F01N3/30 ,  F01N2250/12 ,  F01N2390/02 ,  F01N2410/12 ,  F01N3/20 ,  Y02T10/20

摘要： In a method and apparatus for reducing hydrocarbon emissions from an internal combustion engine during its cold-starting phase an adsorber, which adsorbs hydrocarbons below a desorption temperature and desorbs them above the desorption temperature, is arranged in a bypass conduit to the exhaust conduit and the exhaust gas is passed through the bypass conduit and the adsorber below the desorption temperature of the adsorber, and the bypass conduit is closed when a catalytic converter arranged close the engine in the exhaust conduit upstream of the bypass conduit reaches operating temperature and remains closed at least until a catalytic converter arranged downstream of the adsorber has reached operating temperature.

摘要翻译： 在用于减少内燃机在其冷起动阶段期间的碳氢化合物排放的方法和装置中，吸附器将吸附在解吸附温度以下且低于脱附温度的烃解吸附到排气管道的旁通管道中， 废气通过旁路管道和吸附器低于吸附器的解吸温度，并且当在旁路管道上游的排气管道中靠近发动机设置的催化转化器达到工作温度并且至少保持关闭时，旁通管道关闭 直到布置在吸附器下游的催化转化器达到工作温度。

公开(公告)号：US5743087A

公开(公告)日：1998-04-28

申请号：US665725

申请日：1996-06-18

申请人： Wolfgang Zahn ,  Gunter Loose ,  Axel Hirschmann

发明人： Wolfgang Zahn ,  Gunter Loose ,  Axel Hirschmann

IPC分类号： B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N3/28 ,  F01N13/02

CPC分类号： F01N3/2046 ,  B01D53/8696 ,  B01D53/945 ,  B01D53/9459 ,  B01D53/9495 ,  F01N13/009 ,  F01N3/20 ,  F01N3/2006 ,  F01N3/2828 ,  B01D2255/1021 ,  B01D2255/2063 ,  B01D2255/2065 ,  F01N2330/06 ,  F01N2570/16 ,  Y02T10/22 ,  Y02T10/26

摘要： A method, and an apparatus for carrying out the method, for purifying exhaust gases from internal combustion engines is provided. The engines having a catalyzer system which includes a first catalyzer and at least one second catalyzer, arranged downstream of the first catalyzer, for the conversion of HC, CO and NO.sub.x exhaust gas constituents. Exhaust gases flow through both catalyzers during the entire operating period of the engine. The first catalyzer is suitable for at least the catalytic conversion of HC and CO exhaust gas constituents. In a first step of the method, the first catalyzer is operated over-stoichiometrically during the cold starting phase in order to reduce the HC and CO emissions and, in a second step of the method with .lambda.-controlled stoichiometric exhaust gas composition, the catalytic conversion of the exhaust gas in the first catalyzer is at least largely de-activated and takes place in the second catalyzer. Substantially better endurance of the first catalyzer is attained for the same good reduction in the exhaust gas pollutants.

摘要翻译： 提供了一种用于执行该方法以净化内燃机废气的方法和装置。 发动机具有催化剂系统，其包括第一催化剂和至少一个第二催化剂，其布置在第一催化剂的下游，用于转化HC，CO和NOx废气组分。 在发动机的整个运行期间，废气都流过两个催化剂。 第一催化剂适用于至少HC和CO废气成分的催化转化。 在该方法的第一步中，第一催化剂在冷启动阶段期间以超化学计量的方式操作，以便降低HC和CO排放，并且在该方法的第二步中，使用λ控制的化学计量排气组成，催化剂 第一催化剂中废气的转化至少在很大程度上被去活化并发生在第二催化剂中。 实现了第一催化剂的较好的耐久性，同样能够有效地减少废气污染物。