Method and device for operating an internal combustion engine operating with an excess of air
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United States of America Patent
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Jan 16, 2001
Grant Date -
N/A
app pub date -
Sep 16, 1998
filing date -
Sep 16, 1997
priority date (Note) -
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Abstract
A bypass leads away from the exhaust pipe and the bypass flow is set with an electrically actuable exhaust gas valve. Under certain operating states of the internal combustion engine, in particular when the load is increasing rapidly or during warmup, a portion or the entire exhaust gas flow is diverted through a combined hydrolysis/adsorption catalytic converter in the bypass line. The NO.sub.x contained in the exhaust gas is adsorbed in a particularly favorable manner.
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