Method of controlling line pressure of hydraulic circuit of transmission
US10801611B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 5, 2019 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Aug 5, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/009
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of controlling line pressure of a hydraulic circuit of a transmission, may include turning on electric current by a controller to apply the electric current to an electric oil pump and determining line pressure depending on the electric current applied; and turning off the electric current by the controller so that the electric current being applied to the electric oil pump is cut off when the determined line pressure is greater than a predetermined reference upper limit value, estimating line pressure dropping down with a passage of time and determining the estimated line pressure, wherein when the estimated line pressure becomes lower than a predetermined reference lower limit value, the turning on the electric current is repeated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.