Process and assembly for eliminating nitrogen oxides present in exhaust gas, using a heat exchanger
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 4, 2000
Grant Date -
N/A
app pub date -
Jun 15, 1998
filing date -
Jun 16, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a process and to an assembly for eliminating nitrogen oxides present in the exhaust gas of an internal-combustion engine (1), said assembly being part of the exhaust line (2) coming from the engine and comprising: a nitrogen oxides conversion means, a heat exchanger (4) placed in a bypass line (5) situated upstream from conversion means (3), intended to cool said exhaust gas. According to the invention, the conversion means comprises several catalysts (3) placed in main exhaust line (2), said catalyst(s) having non-coinciding temperature ranges for which conversion of the nitrogen oxides is below a certain threshold (C.sub.min). Furthermore, at least one valve (6) is placed at the inlet of bypass line (5) and intended to modulate the flow of gas between said bypass line (5) and main line (2) so that said exhaust gas reaches catalysts (3) at a temperature where at least one of said catalysts is active.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully