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;
- andincreasing engine output with the transmission grounded to generate increased waste engine heat; and
circulating coolant through the engine during the increased engine output and grounded transmission operation, the coolant further circulated through a cabin heating system.
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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.
23 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; - and
increasing engine output with the transmission grounded to generate increased waste engine heat; 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 (2, 3, 4, 5, 6, 7, 8, 9)
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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; - and
heating a vehicle cabin with the generated waste heat, wherein increasing engine output includes increasing fuel injection and/or increasing intake air charge to increase an engine idle speed. - View Dependent Claims (11, 12, 13)
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14. A vehicle system, comprising,
an engine; -
a cabin heating system; a radiator; 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 the cabin heating system. - View Dependent Claims (15, 16, 17, 18)
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Specification