Hybrid electrical vehicle powertrain thermal control
First Claim
1. A method of providing an optimum thermal environment in a hybrid electrical vehicle, comprising the steps of:
- controlling a motor coolant temperature;
controlling a stator end-turn temperature;
controlling a transmission fluid temperature;
de-rating electric power; and
controlling an electric water valve.
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Accused Products
Abstract
The powertrain thermal system of the present invention contains and/or utilizes various sensors and signals. Some are located within the powertrain thermal system itself. However, the majority are located in other systems of the hybrid electrical vehicle. The sensors used by the thermal system include an engine coolant temperature sensor, located at the outlet of the engine water jacket and contained within the existing engine control unit, a transmission fluid temperature sensor, located at the transmission fluid outlet of the liquid-liquid heat exchanger and contained within the transmission control unit, a motor coolant temperature sensor, located between the electric water pump and the inverter cold plate inlet and contained within the powertrain thermal control unit, a stator end-turn temperature sensor, located at the motor stator end-turn and contained within the motor-inverter control unit, a battery temperature sensor, located and contained within the battery control unit, a road speed sensor, contained within the powertrain supervisory control and an ambient temperature sensor, contained within the electronic climate control system. In addition, the present invention comprises a method of providing an optimum thermal environment in a hybrid electrical vehicle, comprising the steps of controlling a motor coolant temperature, controlling a stator end-turn temperature, controlling a transmission fluid temperature, de-rating electric power; and controlling an electric water valve.
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Citations
20 Claims
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1. A method of providing an optimum thermal environment in a hybrid electrical vehicle, comprising the steps of:
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controlling a motor coolant temperature;
controlling a stator end-turn temperature;
controlling a transmission fluid temperature;
de-rating electric power; and
controlling an electric water valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A powertrain thermal system of a hybrid electrical vehicle, comprising:
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a powertrain thermal control unit;
a powertrain supervisory unit operably connected to said powertrain thermal control unit;
an controller area network link operably connected to said powertrain thermal control unit;
an electronic climate control system operably connected to said controller area network link;
a transmission control unit operably connected to said controller area network link;
a motor-inverter control unit operably connected to said controller area network link;
an engine control unit operably connected to said controller area network link; and
a battery control unit operably connected to said controller area network link. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A powertrain thermal system of a hybrid electrical vehicle, comprising:
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a powertrain thermal control unit comprising a motor coolant temperature sensor, located between an electric water pump and an inverter cold plate;
a powertrain supervisory unit operably connected to said powertrain thermal control unit and comprising a road speed sensor;
a controller area network link operably connected to said powertrain thermal control unit;
an electronic climate control system operably connected to said controller area network link, comprising an ambient temperature sensor, whereby said powertrain thermal control unit receives both an ambient temperature signal and a heater request signal from said electronic climate control through said controller area network link;
a transmission control unit operably connected to said controller area network link, comprising a transmission fluid temperature sensor located at the outlet of the liquid-liquid heat exchanger, whereby said powertrain thermal control unit receives through said controller area network link a transmission fluid temperature signal from said transmission control unit;
a motor-inverter control unit operably connected to said controller area network link, comprising a stator end-turn temperature sensor located at the motor stator end-turn and contained within said motor-inverter control unit, whereby said powertrain thermal control unit receives through said controller area network link both a stator end-turn temperature signal and a cold plate temperature signal from said motor-inverter control unit;
an engine control unit operably connected to said controller area network link and comprising an engine coolant temperature sensor located at an outlet of an engine water jacket, whereby said powertrain thermal control unit receives through said controller area network link an engine control unit fan request signal from said engine control unit; and
a battery control unit operably connected to said controller area network link, comprising a high voltage battery and at least one battery temperature sensor, whereby said powertrain thermal control unit receives through said controller area network link a battery surface temperature signal from said high voltage battery.
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Specification