Exhaust Gas Aftertreatment System and Method
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United States of America Patent
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Issued Date -
May 16, 2024
app pub date -
Mar 8, 2022
filing date -
Apr 30, 2021
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Abstract
An exhaust gas aftertreatment (EAT) system for receiving exhaust gases from an internal combustion engine has a diesel oxidation catalyst (DOC) upstream and in close proximity to a diesel particulate filter (DPF). A pressure differential sensor is configured to measure a pressure differential across the DOC and the DPF between a first measurement position upstream of the DOC and a second measurement position downstream of the DPF. A method of operating the EAT system includes using a mathematical model to determine a pressure drop occurring in the system between the first and second measurement positions outside of the DPF. The modelled pressure drop is used together with a measured pressure drop to derive a value for the pressure drop across the DPF itself for use in a model to determine the soot loading of the DPF.
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