SYSTEMS AND METHODS FOR PARTICULATE FILTER LOAD ESTIMATION
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United States of America
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Mar 19, 2020
app pub date -
Nov 22, 2019
filing date -
Nov 22, 2019
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Abstract
Methods and systems are provided for monitoring a change in exhaust particulate filter (PF) soot load during an engine non-combusting condition. In one example, a method may include, responsive to a higher than threshold PF temperature immediately prior to an engine shutdown, estimating a rate of soot burn when the engine is no longer combusting, and estimating a soot load on the PF during and at an onset of immediately subsequent engine start based in part on the rate of soot burn.
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