Air injection control for preheated catalysts
US5390488A · kind A · utility
14Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Dec 27, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
When a preheater elevates internal combustion engine exhaust gas treatment means temperature above a threshold temperature and prior to and during engine cranking, supplemental air is provided to an internal combustion engine exhaust gas path at a controlled rate responsive to parameters indicating excess engine emission levels during an engine startup period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.