Catalytic converter with two or more honeycomb bodies in a casin

Details Catalytic converter with two or more honeycomb bodies in a casin Catalytic converter with two or more honeycomb bodies in a casin

1996-12-27

1998-03-24

Tran, Hien

Metal working

Method of mechanical manufacture

Fluid pattern dispersing device making, e.g., ink jet

422171, 422177, 422180, 422211, 422222, 428116, 428594, 502439, B01D 5334, B21D 5300, F01N 310

Patent

active

057299021

ABSTRACT:
A catalytic converter includes a casing tube having a given internal diameter. At least two individual honeycomb bodies through which a fluid can flow in a given flow direction, are disposed in the casing tube. The honeycomb bodies are formed of structured metal layers forming flow channels. The layers are joined to the casing tube by joining techniques, such as hard brazing. The honeycomb bodies have a given theoretical strain-free diameter and have an internal layout making the honeycomb bodies elastic and permitting the honeycomb bodies to be inserted into the casing tube with an elastic compression of from 2 to 10% of the given theoretical strain-free diameter and with prestress. A method for producing a catalytic converter includes forming at least two honeycomb bodies with a given theoretical strain-free diameter from structured metal layers defining channels through which a fluid can flow in a given direction. The honeycomb bodies are subsequently successively or simultaneously inserted with prestress from at least one side into a prefabricated casing tube having a given internal diameter. The honeycomb bodies are elastically compressed by from 2 to 10% of the given theoretical strain-free diameter and/or at least partial regions of the casing tube are subsequently plastically compressed by from 2 to 10% of the given internal diameter. The layers are joined to the casing tube.

REFERENCES:
patent: 4795615 (1989-01-01), Cyron et al.
patent: 4923109 (1990-05-01), Cyron
patent: 4969265 (1990-11-01), Ehara
patent: 5055274 (1991-10-01), Abbott
patent: 5094074 (1992-03-01), Nishizawa et al.
patent: 5252299 (1993-10-01), Retallick
patent: 5403559 (1995-04-01), Swars

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