METHOD AND APPARATUS TO CONTROL ENGINE TEMPERATURE FOR A HYBRID POWERTRAIN
First Claim
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1. Method for controlling an internal combustion engine operatively connected to an electro-mechanical transmission to transmit tractive power to a driveline, comprising:
- determining coolant temperature for the internal combustion engine;
adjusting power output of the engine based upon the coolant temperature and a preferred temperature coolant range; and
,controlling the electro-mechanical transmission to transmit tractive power to the driveline to meet an operator torque request based upon the adjusted power output of the engine.
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Abstract
An internal combustion engine is connected to a transmission to transmit tractive power to a driveline. Engine coolant temperature is determined, and power output of the engine is adjusted based upon the coolant temperature and preferred coolant temperature range. The transmission is controlled to transmit tractive power to the driveline to meet an operator torque request based upon the adjusted power output of the engine.
229 Citations
20 Claims
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1. Method for controlling an internal combustion engine operatively connected to an electro-mechanical transmission to transmit tractive power to a driveline, comprising:
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determining coolant temperature for the internal combustion engine; adjusting power output of the engine based upon the coolant temperature and a preferred temperature coolant range; and
,controlling the electro-mechanical transmission to transmit tractive power to the driveline to meet an operator torque request based upon the adjusted power output of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Method for controlling an internal combustion engine operatively connected to an electro-mechanical transmission, comprising:
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monitoring ambient operating conditions and engine operating conditions; determining a coolant temperature; adjusting power output of the engine based upon the coolant temperature and a preferred coolant temperature range; and
,controlling the electro-mechanical transmission based upon the adjusted power output of the engine. - View Dependent Claims (14, 15, 16, 17)
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18. Method for controlling an internal combustion engine fluidly connected to an exhaust aftertreatment system and operatively connected to a transmission, comprising:
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determining a coolant temperature; adjusting an engine speed state and an engine torque state based upon the coolant temperature and a preferred coolant temperature range and minimize a total energy loss during an engine operating cycle; controlling the engine to the adjusted engine speed state and engine torque state to achieve the preferred coolant temperature range; and
,controlling the transmission to transmit tractive power to the driveline to meet an operator torque request based upon the preferred engine operation. - View Dependent Claims (19, 20)
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Specification