| 主权项 |
1. A hybrid vehicle comprising:
an internal combustion engine: a first rotary electric machine; a second rotary electric machine configured to output power to a drive wheel; a transmission including an input element configured to receive power from the internal combustion engine and an output element configured to output power, the transmission being configured to switch between a non-neutral state where power is transmitted between the input element and the output element in either one of a low speed stage and a high speed stage, and a neutral state where power is not transmitted between the input element and the output element; a differential unit including a first rotating element, a second rotating element and a third rotating element, the first rotating element being connected to the first rotary electric machine, the second rotating element being connected to the second rotary electric machine and the drive wheel, the third rotating element being connected to the output element, the differential unit being configured such that, when rotation speeds of any two of the first rotating element, the second rotating element and the third rotating element are determined, a rotation speed of a remaining one of the first rotating element, the second rotating element and the third rotating element is determined; a clutch provided in a second path through which power is transmitted from the internal combustion engine to the first rotary electric machine, the second path being different from a first path through which power is transmitted from the internal combustion engine to the first rotary electric machine via the transmission and the differential unit, the clutch being configured to switch between an engaged state where power is transmitted from the internal combustion engine through the second path to the first rotary electric machine and a released state where transmission of power from the internal combustion engine through the second path to the first rotary electric machine is interrupted; and an electronic control unit configured to change a drive mode among a series-parallel mode, a parallel mode and a series mode, the electronic control unit being configured to (i) control the clutch and the transmission in the series-parallel mode such that the clutch is set to the released state and the transmission is set to the non-neutral state, (ii) control the clutch and the transmission in the parallel mode such that the clutch is set to the engaged state and the transmission is set to the non-neutral state, and (iii) control the clutch and the transmission in the series mode such that the clutch is set to the engaged state and the transmission is set to the neutral state, the electronic control unit being further configured to, when the drive mode is changed from one of the series-parallel mode and the parallel mode to the other one of the series-parallel mode and the parallel mode and the speed stage is changed from one of the low speed stage and the high speed stage to the other one of the low speed stage and the high speed stage, selectively execute either one of a first control and a second control, the first control being control in which the drive mode and the speed stage are changed by passing through the series mode, the second control being control in which one of the drive mode and the speed stage is changed and then the other one of the drive mode and the speed stage is changed without passing through the series mode. |
