Transmission shift control method for reduced torque transients
US10900374B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2019 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Aug 13, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2101/25
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A power extraction system is provided and includes a low-pressure spool of a gas turbine engine, the low-pressure spool being rotatable at an input rotational speed between a first minimum speed and a first maximum speed, downstream components rotatable at an output rotational speed between a second minimum speed and a second maximum speed and a transmission assembly by which rotations of the low-pressure spool at the input rotational speed are transmittable at the output rotational speed to the downstream components. The transmission assembly includes clutches and a controller configured to control openings and closings of the clutches according to an upshifting algorithm whereby a torque applied by the downstream components is used to reduce the output rotational speed to an output speed of a gear into which the transmission assembly is shifting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.