Hydraulic clutch fill control systems for a transmission of a vehicle
US8308608B2 · kind B2 · utility
9Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2010 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Mar 18, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/062
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of filling a clutch chamber of an automatic transmission includes determining an engage pressure to engage a clutch of the automatic transmission. The method determines a reactive pressure of a return spring of the clutch. The method also estimates a fill pressure based on the engage pressure and the reactive pressure. The method estimates a flow rate based on the engage pressure, and generates a fill pressure command signal to fill the clutch chamber based on the fill pressure, the flow rate and a flow rate limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.