Machine element or mechanism – Gearing – Interchangeably locked
Patent
1993-01-29
1994-10-11
Wright, Dirk
Machine element or mechanism
Gearing
Interchangeably locked
74335, B60K 2010
Patent
active
053536622
ABSTRACT:
A powershift transmission includes a plurality of clutches, including a final or directional set of clutches. The clutches are controlled by electro-hydraulic direct acting valves and two electro-hydraulic proportional or pressure modulating valves. The pressure modulating valves modulate the pressure supplied to the direct acting valves associated with the three directional clutches. Vehicle deceleration during a shuttle shift is achieved by releasing (unpressurizing) all clutches, then gradually pressurizing only two clutches in the final or directional set.
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Deere & Company
Ta Khoi Q.
Wright Dirk
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