trap aftertreat systems
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United States of America Patent
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Jan 9, 2018
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app pub date -
Oct 29, 2014
filing date -
Oct 29, 2014
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Abstract
An aftertreatment system utilizes chemical reactions to treat an exhaust gas flow. A system for aftertreatment of the exhaust gas flow includes a NOx sensor configured to monitor within the exhaust gas flow one of a lambda value and a NOx concentration value and a computerized processor device configured to calibrate the monitored value for presence of one of NH3, H2, and hydrocarbons. In one embodiment, the system further includes a pair of NOx sensors, each monitoring both a lambda value and a NOx concentration value. In another embodiment, the system controls the aftertreatment based upon the calibrated values.
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