EXHAUST GAS CLEANING CATALYST METAL HONEY COMB ELEMENT AND ITS MANUFACTURE

Title:

EXHAUST GAS CLEANING CATALYST METAL HONEY COMB ELEMENT AND ITS MANUFACTURE

Document Type and Number:

WIPO Patent Application WO/1998/051410

Kind Code:

A1

Abstract:

Improvement in the engine durability and in the solid phase diffusion connectability of the contact part of a metal flat foil and a metal corrugated film from which a catalyst converter metal honey comb applied to the exhaust gas cleaning is made, characterized in that at least one of the foils has a thickness less than 40 $g(m)m and an A1 content after connection is not less than 3 %, and that the surface states in the width directions of both the metal films are formed in a required surface roughnesses or surface patterns, and that the width of the connection part of both the metal foils is not less than 5 times of the thickness of the metal foil. For effective practice of the above improvement, both the surface roughness and the regulation of thickness or either of them have to be selected. In order to improve the engine durability further, a non-connection part is provided in the honey comb element as described above and/or a shell is provided around the outside circumference of the honey comb element.

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Inventors:

OOTANI TADAYUKI (JP)
IMAI ATUHIKO (JP)
KASUYA MASAYUKI (JP)
IWAMI KAZUTOSHI (JP)
UTUMI TOORU (JP)
YAMANAKA MIKIO (JP)
OHTA HITOSHI (JP)
TOKUNAGA YOSHIKUNI (JP)
SHIMIZU FUJIO (JP)
EGAMI TOSHIHIRO (JP)
NODA TAMIO (JP)

Application Number:

PCT/JP1997/002842

Publication Date:

November 19, 1998

Filing Date:

August 15, 1997

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
OTANI TADAYUKI (JP)
IMAI ATUHIKO (JP)
KASUYA MASAYUKI (JP)
IWAMI KAZUTOSHI (JP)
UTUMI TOORU (JP)
YAMANAKA MIKIO (JP)
OHTA HITOSHI (JP)
TOKUNAGA YOSHIKUNI (JP)
SHIMIZU FUJIO (JP)
EGAMI TOSHIHIRO (JP)
NODA TAMIO (JP)

International Classes:

B01J35/04; B21D47/00; B23K1/00; B23K1/20; B23K20/02; F01N3/28; (IPC1-7): B01J35/04; B32B3/12; B21D47/00; B23K20/14; B23K20/18; B23K101/20

Foreign References:

JPH09215932A	1997-08-19
JPH0822380B2	1996-03-06
JPH0999218A	1997-04-15
JP2521839Y2	1997-01-08
JPH08108077A	1996-04-30
JPH08332394A	1996-12-17
JPH0976035A	1997-03-25

Other References: