Block heater usage detection and coolant temperature adjustment
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United States of America Patent
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Jan 18, 2011
Issued Date -
N/A
app pub date -
Aug 6, 2009
filing date -
Apr 1, 2009
priority date (Note) -
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Abstract
A control system for an engine includes a block heater determination module, an adjustment module, and an engine control module. The block heater determination module generates a block heater usage signal based on ambient temperature, measured engine coolant temperature, and a length of time of the engine being off prior to engine startup. The adjustment module generates a temperature signal based on the ambient temperature. The engine control module determines a desired fuel mass for fuel injection at engine startup based on the temperature signal when the block heater usage signal has a first state. The engine control module determines the desired fuel mass at engine startup based on the measured engine coolant temperature when the block heater usage signal has a second state.
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