Ratio selector mechanisms
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United States of America Patent
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-
Nov 17, 1998
Grant Date -
N/A
app pub date -
Mar 17, 1997
filing date -
Jul 26, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ratio selector mechanism for the selection of the operative ratio in an associated synchromesh vehicle transmission in which a fluid pressure operated actuator operates synchromesh units. The operating pressure of the actuator is varied either mechanically or electronically during selection of a given ratio in the associated transmission or dependent on the ratio being selected. A first actuator selects a shift rail, and a second actuator engages a gear. A valve member acts against a bias force which is varied based on the position of the first actuator to control the pressure in the second actuator.
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