AUXILIARY PUMP SCHEME FOR A COOLING SYSTEM IN A HYBRID-ELECTRIC VEHICLE
First Claim
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1. A method for an engine cooling system with a radiator and a heater core, comprising:
- during engine off, operating an auxiliary pump to flow coolant through the heater core; and
during engine running, operating an engine-driven pump to flow coolant through the heater core and the radiator, and selectively operating the auxiliary pump to assist the flow through the heater core and radiator based on operating conditions.
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Abstract
Various systems and methods are described for a cooling system coupled to an engine in a vehicle. One example method comprises, during engine off, operating an auxiliary pump to flow coolant through a heater core; and, during engine running, operating an engine pump to flow coolant through the heater core and radiator, and selectively operating the auxiliary pump to assist flow through the heater core based on operating conditions.
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Citations
21 Claims
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1. A method for an engine cooling system with a radiator and a heater core, comprising:
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during engine off, operating an auxiliary pump to flow coolant through the heater core; and during engine running, operating an engine-driven pump to flow coolant through the heater core and the radiator, and selectively operating the auxiliary pump to assist the flow through the heater core and radiator based on operating conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for an engine cooling system coupled to an engine in a vehicle, comprising:
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during engine off, operating an auxiliary pump to flow coolant through a heater core; during engine running; operating an engine-driven pump to flow coolant through the heater core and a radiator, selectively operating the auxiliary pump to assist the flow through the heater core and radiator based on operating conditions, and adjusting an amount of auxiliary pump assist based on the operating conditions. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A cooling system for an engine in a motor vehicle, comprising:
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an engine-driven pump; an auxiliary pump in fluidic communication with the engine-driven pump; a first loop including a radiator, and where the engine-driven pump circulates coolant through the radiator in the first loop; a second loop parallel to the first loop including a heater core, and where the auxiliary pump circulates coolant through the heater core in the second loop; and a controller for operating the auxiliary pump and the engine-driven pump, the controller comprising a computer readable storage medium, the medium comprising instructions for; during engine off, operating the auxiliary pump to flow coolant through the heater core; during engine running, operating the engine-driven pump to flow coolant through the heater core and the radiator, and selectively operating the auxiliary pump to assist the flow through the heater core based on operating conditions; and during engine running, adjusting an amount of auxiliary pump assist based on the operating conditions - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification