Exhaust emission control device for a diesel engine
US4934142A · kind A · utility
106Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust emission gas control device having a first filter trapping particulates contained in an exhaust gas, and a second filter removing offensive odor components in the exhaust gas. The first filter is a honeycomb type having a cordierite substrate on which .tau.-alumina is coated. The second filter is provided downstream of the first filter, and is formed by an ion-exchange of copper on a synthetic zeolite rich in silica to form copper ions thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.