Method and system for operating vehicle accessories
First Claim
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1. A method for distributing engine torque, comprising:
- limiting, via a controller, an amount of engine torque supplied to engine accessories in response to driver demand torque and available engine torque and where the amount of engine torque supplied to engine accessories is limited via limiting output of engine accessories.
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Abstract
A method and system for operating vehicle accessories is described. The method and system allocate an available amount of engine torque between different accessories depending on boundary conditions and nominal vehicle operating conditions. In one example, the accessories may include an air conditioner compressor, an alternator, and various vehicle electrical loads that are in electrical communication with the alternator.
23 Citations
19 Claims
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1. A method for distributing engine torque, comprising:
limiting, via a controller, an amount of engine torque supplied to engine accessories in response to driver demand torque and available engine torque and where the amount of engine torque supplied to engine accessories is limited via limiting output of engine accessories. - View Dependent Claims (2, 3)
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4. A method for distributing engine torque, comprising:
limiting, via a controller, an amount of engine torque supplied to engine accessories in response to driver demand torque and available engine torque, where limiting an amount of engine torque supplied to engine accessories includes stopping or ceasing output from one engine accessory. - View Dependent Claims (5, 6, 7)
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8. A method for distributing engine torque, comprising:
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supplying electrical power via an alternator; supplying cooling to a vehicle cabin via an air conditioning system; and adjusting torque of the alternator and torque of the air conditioning system applied to an engine in response to an available amount of engine torque. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for distributing engine torque, comprising:
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an engine; an alternator mechanically coupled to the engine; an air conditioning system mechanically coupled to the engine; and a controller including executable instructions to partition an available amount of engine torque amongst a plurality of engine accessories including the alternator and the air conditioning system such that a total amount of the available amount of engine torque is allocated to the plurality of engine accessories, where the available engine torque is an engine torque capacity at an engine'"'"'s present speed minus engine pumping torque, engine friction torque, driveline torque losses, and wheel torque. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification