Method of controlling a synchronizer actuator fork of a transmission
US9605755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Aug 13, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2063/3093
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and system for controlling movement of an actuator fork of a transmission through a pre-synchronization phase of a synchronization event at a pre-synchronization fork velocity includes adjusting the level of fluid pressure applied to an actuator operatively attached to the actuator fork to control the pre-synchronization fork velocity within a predetermined range of a velocity target. The method determines, via a controller, the fork velocity during the pre-synchronization phase of a current synchronization event, compares the determined fork velocity to a velocity target, and adjusts the pressure level of fluid applied to an actuator piston of the actuator to control the velocity of the actuator fork within a predetermined range defined by the velocity target during a subsequent pre-synchronization phase. The velocity target may be defined for a shift type, such as a fast or slow shift, where the shift type is determined by the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.