Power transmission apparatus for hybrid electric vehicle
AssigneeHyundai Motor Company
InventorsKeunseok Lee, Kum Lim CHOI
Life of this patent
Estimating the term…
Abstract
A power transmission apparatus for a vehicle may include a first shift module configured to change torque input from an engine into four speed stages and to output the four speed stages, a motor/generator directly connected an output side of the first shift module, a second shift module configured to change the four speed stages input from the first shift module into eight speed stages by using a planetary gear set and to output the eight speed stages, and an output device connected to an output side of the second shift module through an output shaft.
Claims20
A power transmission apparatus for a vehicle, comprising:
- a first shift module configured to change torque input from an engine into four speed stages and to output the four speed stages;
- a motor/generator directly connected an output side of the first shift module;
- a second shift module configured to change the four speed stages input from the first shift module into eight speed stages by using a planetary gear set and to output the eight speed stages;
- and
- an output device connected to an output side of the second shift module through an output shaft.
A power transmission apparatus for a vehicle, comprising:
- a first shift module including a first input shaft selectively connected to an output side of the engine through a first clutch, a second input shaft being a hollow shaft, enclosing the first input shaft, selectively connected to the output side of the engine through a second clutch, and provided with a first input gear fixedly disposed thereon, a third input shaft disposed in parallel with and apart from the first and second input shafts, and provided with a second input gear fixedly disposed thereon, an idle gear device meshed with the first input gear on the second input shaft and the second input gear on the third input shaft to transmit torque of the second input shaft to the third input shaft, a pair of odd-numbered speed gears rotatably disposed on the first input shaft and operably connected to the first input shaft selectively through a first synchronizer, a pair of even-numbered speed gears rotatably disposed on the third input shaft and operably connected to the third input shaft selectively through a second synchronizer, and an intermediate device including a counter shaft disposed in parallel with the second and third input shafts, changing the torque of the engine through a plurality of counter gears meshed with the pair of odd-numbered and even-numbered speed gears, and outputting the changed torque;
- a motor/generator directly connected to the counter shaft at the rear of the counter shaft;
- a second shift module including a planetary gear set including three rotation elements, a third clutch selectively connecting a first rotation element of the planetary gear set directly connected to the counter shaft of the first shift module with a second rotation element operated as an output element, and a first brake selectively connecting a third rotation element operated as an output element with a transmission housing;
- and
- an output device connected to the output element of the planetary gear set through an output shaft.
Dependencies are inferred from the claim text.