Method and system of heating cabin of hybrid electric vehicle
First Claim
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1. A method of heating a cabin of a vehicle that adjusts temperature of air supplied into the cabin of the vehicle using a heater disposed adjacent to the cabin of the vehicle and coolant supplied from an engine, the method comprising:
- calculating, by a controller, an allowance power and a demand power of the heater;
determining, by the controller, whether the allowance power of the heater is greater than or equal to a minimum power of the heater;
calculating, by the controller, a first demand temperature of the coolant that is coolant temperature necessary to currently heat the cabin of the vehicle;
determining, by the controller, whether the coolant temperature is less than the first demand temperature of the coolant; and
operating, by the controller, the heater when the allowance power of the heater is greater than or equal to the minimum power of the heater and the coolant temperature is less than the first demand temperature of the coolant.
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Abstract
A method and a system of heating a cabin of a hybrid electric vehicle are provided and minimize the operation of a heater and an engine by reducing the demand temperature of coolant taking into account of power of the heater and improve fuel economy accordingly. The method of heating a cabin of a hybrid electric vehicle adjusts temperature of air supplied into the cabin of the vehicle using a heater disposed adjacent to the cabin of the vehicle and coolant supplied from an engine.
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Citations
20 Claims
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1. A method of heating a cabin of a vehicle that adjusts temperature of air supplied into the cabin of the vehicle using a heater disposed adjacent to the cabin of the vehicle and coolant supplied from an engine, the method comprising:
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calculating, by a controller, an allowance power and a demand power of the heater; determining, by the controller, whether the allowance power of the heater is greater than or equal to a minimum power of the heater; calculating, by the controller, a first demand temperature of the coolant that is coolant temperature necessary to currently heat the cabin of the vehicle; determining, by the controller, whether the coolant temperature is less than the first demand temperature of the coolant; and operating, by the controller, the heater when the allowance power of the heater is greater than or equal to the minimum power of the heater and the coolant temperature is less than the first demand temperature of the coolant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system of heating a cabin of a vehicle comprising:
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an electric power supply; an ambient temperature sensor configured to detect an ambient temperature; a coolant temperature sensor configured to detect a coolant temperature; and a controller configured to adjust a temperature of the air supplied to the cabin of the vehicle by operating an engine, a blower, and a heater, wherein the engine is configured to generate power and warm up a coolant, wherein the blower is configured to blow air into the cabin of the vehicle, wherein the heater is configured to receive electric power from the electric power supply and is disposed on a path through which the air is supplied to the cabin to warm up the air, wherein the coolant warmed up by the engine exchanges heat with the air while passing through the path through which the air is supplied to the cabin, and wherein the controller is configured to operate the heater when allowance power of the heater is greater than or equal to a minimum power of the heater and the coolant temperature is less than a first demand temperature of the coolant that is coolant temperature necessary to currently heat the cabin of the vehicle. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:
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program instructions that calculate an allowance power and a demand power of the heater; program instructions that determine whether the allowance power of the heater is greater than or equal to a minimum power of the heater; program instructions that calculate a first demand temperature of the coolant that is coolant temperature necessary to currently heat the cabin of the vehicle; program instructions that determine whether the coolant temperature is less than the first demand temperature of the coolant; and program instructions that operate the heater when the allowance power of the heater is greater than or equal to the minimum power of the heater and the coolant temperature is less than the first demand temperature of the coolant.
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Specification