Synchronizer fork position control
US9404572B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2015 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Mar 4, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/283
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vehicle includes an engine, a transmission having a position-controlled clutch with a synchronizer sleeve and a synchronizer fork, an input member with an input speed, and an output member with an output speed, and a controller. The controller is programmed to register a slip-away condition when the input speed falls within a calibrated speed band and the output speed remains below a calibrated threshold speed. In response to the registered slip-away condition, the controller records a diagnostic code indicative of the synchronizer sleeve being disengaged, changes an engaged position of the synchronizer sleeve by a calibrated amount to thereby adapt the engaged position, and commands the clutch to disengage and the fork to move to a neutral position after increasing the engaged position. The controller also moves the synchronizer sleeve toward the adapted engaged position and applies the clutch when the synchronizer sleeve attains the adapted engaged position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.