AGGRESSIVE THERMAL HEATING TARGET STRATEGY BASED ON NOX ESTIMATED FEEDBACK
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United States of America Patent
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Issued Date -
Sep 17, 2020
app pub date -
Mar 12, 2019
filing date -
Mar 12, 2019
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Abstract
A method for controlling an engine thermal target setpoint, includes: identifying in a first step an initial NOx integral at an initial calculated cylinder wall temperature and a thermal set point of an engine coolant; initiating a command in a second step to change the initial cylinder wall temperature and to change the thermal set point of the engine coolant; creating in a third step a new NOx integral at a new cylinder wall temperature and a modified thermal set point of the engine coolant; and comparing in a fourth step: is (the new NOx integral minus the initial NOx integral) greater than a predefined minimum threshold; and is (the new NOx integral minus the initial NOx integral) less than a predefined maximum threshold.
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