Aftertreatment system

An aftertreatment system for a diesel engine may include a diesel particulate filter configured for placement in fluid communication with the diesel engine to receive an exhaust flow. The system may also include a selective catalytic reduction system configured for arrangement downstream of the dies...

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Bibliographic Details
Main Authors Nagesh, Sowmya, Richards, Tyler V, Ratts, Joshua L, Mowers, Matthew Colin, Shah, Hrishi Lalit
Format Patent
LanguageEnglish
Published 15.08.2023
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
STEAM ENGINES
TRANSPORTING
WEAPONS
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Summary:An aftertreatment system for a diesel engine may include a diesel particulate filter configured for placement in fluid communication with the diesel engine to receive an exhaust flow. The system may also include a selective catalytic reduction system configured for arrangement downstream of the diesel particulate filter and a NOx sensor configured to measure a NOx concentration in the exhaust flow entering the selective catalytic reduction system. The system may also include a controller configured to estimate a ratio of NO2 to NOx downstream of the diesel particulate filter and based on a factor affecting the generation of NO2 upstream of the selective catalytic reduction system. The controller may also be configured to adjust the measured NOx concentration based on the ratio to provide an estimated actual NOx concentration and dose diesel exhaust fuel into the exhaust flow based on the estimated actual NOx concentration.
Bibliography:Application Number: US202217665796