Exhaust gas purifying apparatus for engine
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United States of America Patent
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Oct 11, 2011
Grant Date -
Apr 17, 2008
app pub date -
Dec 7, 2007
filing date -
Jun 10, 2005
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Abstract
. For detection of abnormality, a detected concentration Dn is adopted when the percentage GRDt of temperature change of urea aqueous solution is small, so that convection is small and it is determined not to affect accurate detection of an abnormality.
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