EP 0386013 B1 19911113 - CATALYZER WITH FLOW GUIDING BODY
Title (en)
CATALYZER WITH FLOW GUIDING BODY
Publication
Application
Priority
DE 3733402 A 19871002
Abstract (en)
[origin: WO8902978A1] A catalyzer, in particular for internal combustion engines, has a diffusor that widens in the direction of flow upstream of a honeycombed catalyst body (23), a converger (25) that narrows in the direction of flow downstream of the catalyst body (23) and at least one flow guiding body located within the diffusor and/or converger. In order to achieve a uniform inflow at the front side of the catalyst body (23) without excessively throttling the flow of exhaust gases, a flow guiding body (24) composed of a plurality of adjacent and/or imbricated channels having at least partially an increasing cross-section in the direction of flow is arranged at least in the diffusor. The individual channels preferably have an opening angle alpha that prevents burbling at the walls of the individual channels. In addition, the flow guiding body can be coated with a catalytically active material, thus allowing the volume of the diffusor, if necessary of the converger as well, to be also used for housing catalytically active surfaces. This can improve in particular, besides the inflow at the main catalyst body (23), the cold start properties of the catalyzer.
IPC 1-7
IPC 8 full level
F01N 3/24 (2006.01); B01D 53/34 (2006.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01); F01N 13/02 (2010.01)
CPC (source: EP US)
F01N 3/281 (2013.01 - EP US); F01N 3/2814 (2013.01 - EP US); F01N 3/2817 (2013.01 - EP US); F01N 3/2892 (2013.01 - EP US); F01N 13/0097 (2014.06 - EP US); F01N 2330/04 (2013.01 - EP US); F01N 2330/324 (2013.01 - EP US); F01N 2330/36 (2013.01 - EP US); F01N 2510/06 (2013.01 - EP US); Y10T 428/24149 (2015.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 8902978 A1 19890406; DE 3733402 A1 19890413; DE 3866244 D1 19911219; EP 0386013 A1 19900912; EP 0386013 B1 19911113; ES 2009047 A6 19890816; JP H02502110 A 19900712; JP H0791972 B2 19951009; RU 1839696 C 19931230; US 5103641 A 19920414; US 5150573 A 19920929
DOCDB simple family (application)
EP 8800756 W 19880823; DE 3733402 A 19871002; DE 3866244 T 19880823; EP 88907684 A 19880823; ES 8802956 A 19880929; JP 50705188 A 19880823; SU 4743436 A 19900330; US 46956590 A 19900328; US 81487091 A 19911230