Honeycomb body as catalyst support for cleaning the exhaust of internal combustion engines
US4863895A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Apr 8, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Honeycomb bodies for cleaning the exhaust gases of internal combustion engines function as carrier for a wash coat impregnated with a noble metal. The known honeycomb bodies exhibit square conduit cross sections with a cross-sectional area of approximately 1.1.times.1.1 mm.sup.2. The small cross sections result in high flow resistances which are amplified even more by deposits of rather thick layers of wash coat in the corner areas. A considerable diminution of the flow resistances is achieved without reducing the amounts of harmful substances converted while saving honeycomb material if the honeycomb bodies (1) comprise individual conduits (2) which exhibit a ratio of width (3) to height (4) of 1.5 to 15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.