Method and means for shifting a hydromechanical transmission
US7354368B2 · kind B2 · utility
21Cited by
5References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2005 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Jan 6, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0403
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for achieving high quality shifts with one hydraulic unit near zero displacement when using dog clutches. This method includes selecting the proper displacement and vocation (whether the hydrostatic unit works as a pump or motor) of a low displacement hydraulic unit during the shift, selecting the appropriate speed differential between the clutch elements, selecting the proper vehicle speed at which to make the shift, and sequencing the displacement changes of the hydraulic units with a controller in order to achieve the desired shift conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.