Machine element or mechanism – Gearing – Interchangeably locked
Patent
1992-01-23
1993-07-06
Braun, Leslie A.
Machine element or mechanism
Gearing
Interchangeably locked
74336R, F16H 5900
Patent
active
052243923
ABSTRACT:
An auxiliary transmission section (14) shift control system (230)/method is provided which include a residual pressure valve (246) and a one-way restricted flow pressure relief valve (250) to prevent an auxiliary section high speed ratio synchronized clutch (92) damage if the main transmission section (12) is engaged during an auxiliary section upshift. The chamber (224A) of the actuator (220) associated with the high speed synchronizer clutch is constantly gradually vented to a reference pressure through a severely restricted orifice in the one way restricted flow pressure relief valve (250) and the residual pressure valve (246) will block fluid flow from the source (234) to the slave valve (238) whenever the main transmission section is shifted to the not neutral condition thereof. Accordingly, whenever an auxiliary section upshift is attempted while the main transmission section is in the not neutral condition thereof, the actuator (222) will assert a force gradually reduced from a first high force to a second lower force on the high speed range clutch to prevent or minimize damage thereto.
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Hutchison Ronald A.
Monette Daniel A.
Braun Leslie A.
Eaton Corporation
Gordon H. D.
Wittels Daniel
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