Machine element or mechanism – Gearing – Interchangeably locked
Patent
1991-06-03
1992-04-21
Braun, Leslie A.
Machine element or mechanism
Gearing
Interchangeably locked
74861, 3644241, F16H 302
Patent
active
051056755
ABSTRACT:
In a transmission system, a solenoid controlled electro-hydraulically actuated creeper gear coupler permits selection of very low speeds and provision is made to prevent creeper gear engagement/disengagement unless conrolled by the operator and then only if specified conditions exist. Current flow through the solenoid which actuates the creeper gear is monitored at all times to provide a controlled engagement/disengagement of the creeper gear in the event the monitoried conditions are not within prescribed limits. The current is monitored as the creeper solenoid is energized to insure sufficient pull-in current and while it is energized to insure sufficient hold-in current. The solenoid current is also monitored when the solenoid is not energized. Short or open circuit conditions are detected before they can cause an unexpected engagement or disengagement of the creeper gear.
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Churchill Stephen J.
Langford Michael E.
Nielsen Bradley A.
Pearce Shairyl I.
Sokol David G.
Braun Leslie A.
Ford New Holland Inc.
Trousdell William O.
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