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US 6,793,600 B2Granted
Powertrain for hybrid electric vehicles
AssigneeKazuyoshi Hiraiwa
InventorKazuyoshi Hiraiwa
Life of this patent
Estimating the term…
Abstract
A powertrain for hybrid electric vehicle has an internal engine 10, two motors/generators 46, 54, and two planetary gear sets. A first planetary gear set 20 has a first sun gear 22 that establishes a reduced speed ratio when it is brake. A second planetary gear set 30 has a second sun gear 32 that establishes a overdrive ratio.
Claims5
A powertrain for hybrid vehicles comprising:
- an internal combustion engine;
- an input shaft driven by said engine;
- an output shaft;
- a plural sets of planetary gear sets between said input shaft and said output shaft, said planetary gear sets including a first planetary gear set and a second planetary gear set, said first planetary gear set having a first rotatable member, and said second planetary gear set having a second rotatable member, said first rotatable member establishing a reduced speed ratio when said first rotatable member is braked, said second rotatable member establishing an overdrive speed ratio when said second rotatable member is braked;
- a first electric motor/generator connectable with said first rotatable member;
- a second electric motor/generator being connected with said output shaft and free from said second rotatable member at a low-speed ratio, said second electric motor/generator being connected to said second rotatable member at a high-speed ratio.
3 more elements
Dependencies are inferred from the claim text.