Apparatus for controlling exhaust concentration
US5357749A · kind A · utility
37Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1992 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | May 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A NOx reducing catalyst can most efficiently remove both NOx and HC when concentrations of NOx and HC in exhaust have a specified relationship between them. For this purpose, an apparatus is adapted to control the concentrations of NOx and HC at an upstream of a catalyst to have a specified relationship. Sensors for detecting the concentration of NOx and HC are arranged at an upstream side of the catalyst. Additionally, a device for levelling a quantity of HC discharge is disposed to suppress variation thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.