Method for operating the catalyst of an internal combustion engine
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United States of America Patent
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-
Dec 17, 2002
Grant Date -
Sep 26, 2002
app pub date -
Nov 26, 2001
filing date -
Dec 31, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An internal combustion engine (1), especially for a motor vehicle, is described, which has a catalytic converter (12) which can be loaded with and unloaded of nitrogen oxides. An NOx sensor (14) is provided with which NOx emissions can be measured downstream of the catalytic converter (12). The catalytic converter (12) can be only partially loaded by a control apparatus (18). An increased NOx emission can be generated forward of or in the catalytic converter (12) by the control apparatus (18). A conclusion can be drawn as to the operability of the catalytic converter (12) by the control apparatus (18) from NOx emissions measured downstream.
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