Patent ID: 7845247
Filing Date: 2010-12-07
Classification: F16H,Y10T

Abstract:
1. A shift fork actuation system for controlling synchronizer position in an automated transmission, comprising: an actuator housing defining at least one piston cavity having a first portion with a first diameter and a second portion with a second diameter smaller than the first diameter such that the actuator housing forms a shoulder at an interface of the first and second portions; a piston assembly movable within said at least one piston cavity and characterized by at least one outer diameter; wherein the outer diameter is larger than the second diameter such that the shoulder stops movement of the piston assembly into the second portion; wherein the piston assembly is operatively connected to the synchronizer and wherein movement of the piston assembly establishes different positions of the synchronizer, including a neutral position corresponding with the piston assembly being stopped at the shoulder; a piston sensor assembly including: a sensor pick-up positioned on the actuator housing and configured to sense the position of the magnet and provide a signal corresponding with the position of the magnet to provide feedback of the piston assembly position and thereby of the corresponding synchronizer position.