Method and apparatus for providing a hydraulic transmission pump assembly having a differential actuation
US6644939B2 · kind B2 · utility
4Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2001 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jan 23, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic transmission pump assembly including a pump, an electric motor operatively coupled to the pump, and a differential gear assembly interposed between the two. The differential gear assembly acts to divide engine torque between the pump and the electric motor at engine speeds above a predetermined level thereby providing fluid under pressure to the transmission and driving the electric motor to generate electricity; the electric motor also being operable to drive the pump at engine speeds below the predetermined level thereby providing fluid under pressure to the transmission during this operating condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.