Metal honeycomb body for exhaust gas purification catalyst and method for producing the same
US6689328B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2000 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Mar 6, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1234
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In order to improve solid phase diffusion bondability at contact portions between a metal flat foil and a metal corrugated foil together constituting a metal honeycomb body for a catalyst converter used for purifying an exhaust gas and to improve engine durability, the present invention comprises one or combination of the following structures; a structure wherein at least one of the metal foils has a foil thickness of less than 40 &mgr;m; a structure wherein an Al content after bonding is at least 3%; a structure wherein the surface condition of both metal foils in a width-wise direction has a predetermined surface coarseness or a predetermined surface shape and condition; and a structure wherein the width of contact portions between both metal foils is at least five times the thickness of the metal foils. In order to further improve engine durability, the present invention disposes an unbonded portion inside the honeycomb body having the construction described above, or disposes a shell on the outer periphery of the honeycomb body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.