Hybrid vehicle and control method thereof
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKazunari Kawata, Ben Leslie Vogler, Benjamin Michael Geller, Mitsuhiro Fukao
Life of this patent
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Abstract
The control device controls the first MG and the second MG so that the input power to the power storage device does not exceed the input limit Win. Further, the control device controls the first MG and the engine so that the rotational speed of the engine approaches the target when the engine is operating under load, when the input limit Win is lowered in a situation where the second MG moves backward while generating torque in the forward direction, and the engine is operating under load, the control device suppresses the amount of power generated by the first MG.
Claims10
A hybrid vehicle, comprising:
- an internal combustion engine;
- a first rotating electrical machine;
- a planetary gear mechanism in which the internal combustion engine, the first rotating electrical machine, and an output shaft are connected;
- a second rotating electrical machine connected to the output shaft;
- a power storage device capable of storing electric power generated by the first rotating electrical machine and electric power generated by the second rotating electrical machine;
- and
- a control device that controls the internal combustion engine and the first and second rotating electrical machines, wherein
- the control device
- controls the first and second rotating electrical machines so that input power to the power storage device does not exceed an input limit value indicating a limit of the input power,
- controls the first rotating electrical machine and the internal combustion engine so that a rotational speed of the internal combustion engine approaches a target when the internal combustion engine is operating under load, and
- under a situation of a vehicle downhill movement where the hybrid vehicle moves backward while generating torque in a forward direction by the second rotating electrical machine, when the input limit value is equal to or less than a threshold value and the internal combustion engine is operating under load, the control device suppresses a power generation amount of the first rotating electrical machine to be equal to or less than a predetermined value.
A method of controlling a hybrid vehicle,
- the hybrid vehicle including:
- an internal combustion engine;
- a first rotating electrical machine;
- a planetary gear mechanism in which the internal combustion engine, the first rotating electrical machine, and an output shaft are connected;
- a second rotating electrical machine connected to the output shaft;
- and
- a power storage device capable of storing electric power generated by the first rotating electrical machine and electric power generated by the second rotating electrical machine,
- the method comprising:
- controlling the first and second rotating electrical machines so that input power to the power storage device does not exceed an input limit value indicating a limit of the input power;
- controlling the first rotating electrical machine and the internal combustion engine so that a rotational speed of the internal combustion engine approaches a target when the internal combustion engine is operating under load;
- and
- suppressing a power generation amount of the first rotating electrical machine to be equal to or less than a predetermined value, under a situation of a vehicle downhill movement where the hybrid vehicle moves backward while generating torque in a forward direction by the second rotating electrical machine, when the input limit value is equal to or less than a threshold value and the internal combustion engine is operating under load.
Dependencies are inferred from the claim text.