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US 2018/0001757 A1Published application
Control apparatus for hybrid vehicle and control method for hybrid vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHidehiro OBA
Life of this patent
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Abstract
An electronic control unit is configured to select one of a series mode, a series-parallel mode and a parallel mode as a running mode. A load level of a hybrid vehicle is set to a value that is high in the order of a load level at which the parallel mode is selected, a load level at which the series-parallel mode is selected, and a load level at which the series mode is selected. That is, the electronic control unit selects the series-parallel mode in an intermediate load region, selects the series mode in a low load region, and selects the parallel mode in a high load region.
Claims7
A control apparatus for a hybrid vehicle,
- the hybrid vehicle including an engine, a first rotating electrical machine, an output shaft, a second rotating electrical machine, a planetary gear mechanism and a changeover device,
- the output shaft being connected to a driving wheel,
- the second rotating electrical machine being connected to the output shaft,
- the planetary gear mechanism mechanically coupling the engine, the first rotating electrical machine and the output shaft to one another, and
- the changeover device being configured to change a coupling state of the planetary gear mechanism with respect to the engine and the output shaft,
- the control apparatus comprising
- an electronic control unit configured to:
- control the changeover device such that the coupling state of the planetary gear mechanism is changed;
- and
- select one of three running modes by changing the coupling state of the planetary gear mechanism in accordance with a load level of the hybrid vehicle,
- the three running modes being a series mode, a series-parallel mode and a parallel mode,
- the series mode being a mode in which a motive power of the engine is transmitted to the first rotating electrical machine and converted into an electric power,
- the series-parallel mode being a mode in which part of a motive power of the engine is mechanically transmitted to the output shaft by a torque of the first rotating electrical machine, and the remaining motive power of the engine is transmitted to one of the first rotating electrical machine and the second rotating electrical machine and converted into an electric power,
- the parallel mode being a mode in which a motive power of the engine is mechanically transmitted to the output shaft with a deceleration ratio mechanically fixed to a predetermined ratio,
- the deceleration ratio being a ratio of a rotational speed of the engine to a rotational speed of the output shaft,
- the load level of the hybrid vehicle becoming low in order of a first load level, a second load level and a third load level,
- the first load level being a load level at which the parallel mode is selected,
- the second load level being a load level at which the series-parallel mode is selected, and
- the third load level being a load level at which the series mode is selected.
16 more elements
A control method for a hybrid vehicle,
- the hybrid vehicle including an engine, a first rotating electrical machine, an output shaft, a second rotating electrical machine, a planetary gear mechanism, a changeover device and an electronic control unit,
- the output shaft being connected to a driving wheel,
- the second rotating electrical machine being connected to the output shaft,
- the planetary gear mechanism mechanically coupling the engine, the first rotating electrical machine and the output shaft to one another, and
- the changeover device being configured to change a coupling state of the planetary gear mechanism with respect to the engine and the output shaft,
- the control method comprising:
- controlling, by the electronic control unit, the changeover device such that the coupling state of the planetary gear mechanism is changed, and
- selecting, by the electronic control unit, one of three running modes, by changing the coupling state of the planetary gear mechanism in accordance with a load level of the hybrid vehicle,
- the three running modes being a series mode, a series-parallel mode and a parallel mode,
- the series mode being a mode in which a motive power of the engine is transmitted to the first rotating electrical machine and converted into an electric power,
- the series-parallel mode being a mode in which part of a motive power of the engine is mechanically transmitted to the output shaft by a torque of the first rotating electrical machine, and the remaining motive power of the engine is transmitted to one of the first rotating electrical machine and the second rotating electrical machine and converted into an electric power,
- the parallel mode being a mode in which a motive power of the engine is mechanically transmitted to the output shaft with a deceleration ratio mechanically fixed to a predetermined ratio,
- the deceleration ratio being a ratio of a rotational speed of the engine to a rotational speed of the output shaft,
- the load level of the hybrid vehicle becoming low in order of a first load level, a second load level and a third load level,
- the first load level being a load level at which the parallel mode is selected,
- the second load level being a load level at which the series-parallel mode is selected, and
- the third load level being a load level at which the series mode is selected.
14 more elements
Dependencies are inferred from the claim text.