Internal combustion engine with exhaust aftertreatment and its method of operation
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United States of America Patent
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Feb 14, 2017
Grant Date -
Oct 31, 2013
app pub date -
Jan 7, 2011
filing date -
Jan 7, 2011
priority date (Note) -
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Abstract
A method of operating an internal combustion engine is proposed, the engine comprising an exhaust system with a DOC and a DPF and, downstream thereof a SCR catalyst. The ECU is configured to allow operation in at least one of a normal mode and a heat-up mode. A predicted temperature evolution of said second exhaust after treatment means is regularly determined based on a thermal model taking into account the thermal inertia of the exhaust system and having as input the current temperatures of the DOC/DPF and SCR. The predicted temperature evolution of SCR is indicative of the temperature that the SCR may reach during a simulated time period in case the operating mode. The engine operating mode is changed depending on the predicted temperature evolution.
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