Method of detecting filling of hydraulic clutch
US8615349B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2009 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Apr 6, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2306/36
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of detecting filling of a hydraulic cylinder and incipient full engagement of a hydraulically operated clutch of a vehicular transmission utilizes a pressure sensor disposed in a hydraulic line to the clutch cylinder which provides a signal that the hydraulic pressure has dropped as the clutch cylinder begins to fill and also that the pressure has returned to a substantially normal level. The pressure sensor may be a continuously variable output device such as an analog sensor, pulse width modulation (PWM) sensor, a similar device or, less desirably, a two state sensor. An iterative algorithm utilizes data from the sensor and a timer to determine when clutch fill is complete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.