Oil pump control method for DCT
US10738841B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 17, 2019 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Apr 17, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/70406
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil pump control method for a DCT may include estimating line pressure, using a pressure-up model formed from a relationship between an oil pump driving current and a hydraulic pressure; stopping the oil pump when the line pressure estimated from the pressure-up model is equal to or higher than a predetermined upper limit hydraulic pressure; estimating a dropping line pressure from a first pressure-down model for a predetermined first reference time after stopping the oil pump on the basis of the line pressure estimated when the oil pump is stopped as an initial value; forming a second pressure-down model by opening a solenoid valve supplying hydraulic pressure to a non-drive side clutch, and estimating a line pressure from the second pressure-down model, and returning to the pressure-up step when the line pressure reaches predetermined lower limit hydraulic pressure or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.