Method and system for adapting engine coolant temperature (ECT) warm-up trajectory based on heater core loading to adjust cabin temperature
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United States of America Patent
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Jul 16, 2013
Grant Date -
N/A
app pub date -
Aug 30, 2012
filing date -
Aug 30, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
In a hybrid-electric vehicle that includes a cabin, methods and systems are provided for modifying a first curve for engine coolant temperature (ECT) warm-up trajectory. The system includes a processor configured to execute software instructions, and a memory configured to store software instructions accessible by the processor. In one embodiment, the software instructions comprise an offset lookup table that is configured to generate, based on a calculated thermal power loss across a heater core and an ambient air temperature, an offset value for modifying the first curve for ECT warm-up trajectory to produce a desired curve for ECT warm-up trajectory that is offset from the first curve. The desired curve for ECT warm up trajectory is used to adjust temperature in the cabin so that fuel consumption can be reduced.
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Family
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