Method and system for cabin heating
First Claim
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1. A method of operating a vehicle engine coupled to a transmission, comprising,during a vehicle stopped condition,grounding the transmission to a frame of the vehicle, the transmission grounded in response to a cabin temperature;
- andincreasing engine output with the transmission grounded to generate increased waste engine heat.
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Abstract
Methods and systems are provided for selectively increasing an amount of waste heat generated by an idling engine. An engine output is increased while a transmission output is locked to generate waste heat that may be used to heat the cabin of a stopped vehicle.
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Citations
18 Claims
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1. A method of operating a vehicle engine coupled to a transmission, comprising,
during a vehicle stopped condition, grounding the transmission to a frame of the vehicle, the transmission grounded in response to a cabin temperature; - and
increasing engine output with the transmission grounded to generate increased waste engine heat. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of operating a vehicle engine coupled to a transmission, comprising:
- during a vehicle stopped condition, grounding the transmission to a frame of the vehicle and increasing engine output with the transmission grounded to generate increased waste engine heat, further comprising transferring the generated heat to a transmission fluid, the transmission fluid further circulated through a cabin heating system.
- View Dependent Claims (8)
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9. A method of operating a vehicle engine coupled to a transmission, comprising:
- during a vehicle stopped condition, grounding the transmission to a frame of the vehicle and increasing engine output with the transmission grounded to generate increased waste engine heat, wherein the engine output is increased and the transmission is grounded to a frame of the vehicle while a torque converter coupled between the engine and transmission is unlocked.
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10. A method of operating a vehicle engine coupled to a transmission through a torque converter, comprising,
during an engine idling condition, locking a transmission output while increasing an engine output to generate waste heat, wherein locking the transmission output includes grounding the transmission to a frame of the vehicle with the torque converter unlocked; - and
heating a vehicle cabin with the generated waste heat. - View Dependent Claims (11, 12, 13)
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14. A vehicle system, comprising,
an engine; -
a transmission, the transmission including one or more transmission clutches; a torque converter coupling the engine to the transmission; and a controller with computer readable instructions for, during a vehicle stopped condition, grounding a transmission output while increasing an engine output to generate heat with the torque converter at least partially unlocked; and circulating coolant through the engine during the increased engine output and grounded transmission operation, the coolant further circulated through a cabin heating system. - View Dependent Claims (15, 16, 17, 18)
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Specification