Method and an apparatus for the treatment of exhaust gas from IC engines
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United States of America Patent
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Sep 1, 1992
Grant Date -
N/A
app pub date -
Jun 8, 1990
filing date -
Jun 8, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
For the treatment of exhaust gases, more particularly the catalytic treatment of exhaust gases from IC engines, and more especially the exhaust gases of an automobile, the exhaust gases are passed through a preconverter associated with a main converter and designed for cold start conditions, as long as the engine is in a first operating condition thereof, in which the exhaust gas temperature is not sufficient to activate the main converter. As soon as a second operating state is attained, in which the exhaust gas temperature activates the main converter, the exhaust gases are passed in parallel via the preconverter and the main converter.
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