Exhaust system
US6422007B1 · kind B1 · utility
20Cited by
13References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2001 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Feb 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust system or an engine (12) includes a lean NOx catalytic device (18), and a heat exchanger (70) positioned upstream of the catalytic device (18). Control means (44, 46) controls a valve (36) to regulate exhaust gas flow through the heat exchanger (70) or along a bypass path (26). The heat exchanger (70) can cool the exhaust gases to ensure that the maximum operating temperature of the catalytic device (1) is not exceeded. During use, the heat exchanger (70) can be bypassed to allow high temperature purge cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.