Invention Application
- Patent Title: METHOD OF CONTROLLING A SYNCHRONIZER ACTUATOR FORK OF A TRANSMISSION
- Patent Title (中): 控制传输同步器执行器的方法
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Application No.: US14254488Application Date: 2014-04-16
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Publication No.: US20150300485A1Publication Date: 2015-10-22
- Inventor: Christopher Jay Weingartz , Glenn W. Hoefflin
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Main IPC: F16H61/28
- IPC: F16H61/28 ; F16H61/30 ; F16H61/04

Abstract:
A method of controlling movement of an actuator fork and attached synchronizer sleeve of a transmission through a pre-synchronization phase of a synchronization event at a pre-synchronization fork velocity below a breakaway velocity such that a strut is retained to the sleeve by a ball plunger for the duration of the pre-synchronization phase. A method of adjusting one of a pressure signal and a flow signal to an actuator piston to control movement of the actuator fork includes moving the fork from an initial disengaged position through a pre-synchronization phase of a synchronization event by controlling one of a pre-synchronization fluid pressure value and flow value, where the controlled pre-synchronization fluid value is less than a threshold value corresponding to a breakaway force of a ball plunger configured to selectively retain a strut assembly to a synchronizer sleeve operatively attached to the actuator fork.
Public/Granted literature
- US09360109B2 Method of controlling a synchronizer actuator fork of a transmission Public/Granted day:2016-06-07
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