METHOD FOR MONITORING COMPONENTS IN AN EXHAUST AFTERTREATMENT SYSTEM AND ENGINE ARRANGEMENT INCLUDING EXHAUST AFTERTREATMENT SYSTEM MONITORING ARRANGEMENT
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United States of America Patent
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Issued Date -
Nov 21, 2019
app pub date -
Jan 24, 2017
filing date -
Jan 24, 2017
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Abstract
A method and engine arrangement are provided for monitoring components in an exhaust aftertreatment system (EATS) including a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and a selective catalytic reduction catalyst (SCR). A first 02 level is measured at a first location between the DOC and the DPF, a second 02 level is measured at a second location downstream of the SCR, a first NOx level is measured at. the first location, a second NOx level is measured at the second location, SCR efficiency is calculated based on the first and second NOx levels, and whether the DOC, the DPP. and the SCR are functioning property is determined based on whether the first 02 level is within a first 0:2 target, whether the second 02 level is within a second 02 target, and whether SCR efficiency is within an SCR efficiency target.
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