Adaptive control of a flow control solenoid valve
US9188221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2014 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | May 31, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/062
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vehicle includes an engine, first clutch, transmission, and controller. The transmission includes a gearbox, position sensors, and a fluid circuit. The gearbox contains a second clutch. The fluid circuit includes a pump and a flow control solenoid valve. The controller opens the valve via flow control signals to allow fluid to pass into or from the particular clutch it feeds. The controller executes steps of a method to determine an actual flow rate through the valve as the clutch moves, and also calculates a compensation scale factor as a ratio of the commanded and actual flow rates. The controller modifies the flow control signals in a subsequent clutch actuation using the compensation scale factor, such as by multiplying a commanded flow rate corresponding to the flow control signals by the compensation scale factor. A system includes rotatable members connected by a clutch, the controller, valve, and position sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.