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1. (WO2017040134) SYSTEM AND METHOD FOR IMPROVED TRANSMISSION SHIFTING

Pub. No.:    WO/2017/040134    International Application No.:    PCT/US2016/048320
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Aug 25 01:59:59 CEST 2016
IPC: F16H 61/04
F16D 25/061
F16H 63/30
Applicants: FCA US LLC
Inventors: BLACK, Daniel H.
SKAVANG, Dustin B.
Title: SYSTEM AND METHOD FOR IMPROVED TRANSMISSION SHIFTING
Abstract:
A transmission having an input shaft, piston, dog clutch, sensor sleeve and control system is provided. The dog clutch (A) includes male and female members (50, 58), where one of the members is coupled to the piston (66) for common movement therewith. The sleeve (88) includes a through channel (112) and a reduced diameter sensor portion (128) terminating at a shoulder (124). The control system is configured to: command a supply of hydraulic fluid against an engagement side of the piston, determine when a terminal end of the sensor portion contacts a control, and determine that the dog clutch members are in a predetermined partially engaged state less than a fully engaged state of the dog clutch members. A length of the reduced diameter sensor portion (128) directly corresponds to the predetermined partially engaged state of the dog clutch that is less than a fully engaged state of the male and female members of the dog clutch.