Drive device for hybrid vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHidehiro Oba
Life of this patent
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Abstract
A drive device is equipped with a countershaft, an engine, a first MG, a second MG, and a Ravigneaux-type planetary gear unit that includes a ring gear, a pinion, a carrier, a first sun gear, and a second sun gear. The pinion includes a first tooth portion that meshes with the ring gear and the first sun gear, and a second tooth portion that is provided at a position offset from the first tooth portion in an axial direction of the pinion and that meshes with the second sun gear. The drive device is further equipped with a first clutch that changes over a state of connection between the first sun gear and the engine, a second clutch that changes over a state of connection between the carrier and the engine, and a first brake that changes over a state of fixation of the second sun gear to a case.
Claims8
A drive device for a hybrid vehicle, the drive device comprising:
- a drive shaft that is connected to a driving wheel of the hybrid vehicle;
- an engine;
- a first rotating electrical machine;
- a second rotating electrical machine that is mechanically connected to the drive shaft;
- a planetary gear unit as a Ravigneaux-type planetary gear unit, the planetary gear unit including a first sun gear that is connected to the first rotating electrical machine, a second sun gear that is arranged such that a rotation center of the second sun gear coincides with a rotation center of the first sun gear, a ring gear that is mechanically connected to the drive shaft, and a pinion that includes a first tooth portion and a second tooth portion, and a carrier that is connected to the pinion, the first tooth portion meshing with the ring gear and the first sun gear, and the second tooth portion being provided at a position offset from the first tooth portion in an axial direction of the pinion and meshing with the second sun gear;
- a first clutch that is configured to selectively make a changeover between a state in which the first sun gear and the engine are connected to each other and a state in which the first sun gear and the engine are not connected to each other;
- a second clutch that is configured to selectively make a changeover between a state in which the carrier and the engine are connected to each other and a state in which the carrier and the engine are not connected to each other;
- and
- a first brake that is configured to selectively make a changeover between a state in which the second sun gear is fixed to a fixation member and a state in which the second sun gear is not fixed to the fixation member.
Dependencies are inferred from the claim text.