Invention Grant
- Patent Title: Method of controlling a synchronizer actuator fork of a transmission
- Patent Title (中): 控制变速器同步器执行机构叉的方法
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Application No.: US14254488Application Date: 2014-04-16
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Publication No.: US09360109B2Publication Date: 2016-06-07
- 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
- Agency: Quinn Law Group, PLLC
- Main IPC: B60K17/10
- IPC: B60K17/10 ; F16H59/02 ; F16H61/28 ; F16H61/04 ; F16H61/30

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
- US20150300485A1 METHOD OF CONTROLLING A SYNCHRONIZER ACTUATOR FORK OF A TRANSMISSION Public/Granted day:2015-10-22
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