Interrelated power delivery controls – including engine control – Transmission control – Engine starting interlock
Patent
1993-10-06
1996-05-07
Wright, Dirk
Interrelated power delivery controls, including engine control
Transmission control
Engine starting interlock
3404573, 74475, F02N 1700, F16H 5974
Patent
active
055140483
ABSTRACT:
A directional control system for an off-highway implement including a self-propelled engine with a transmission assembly connected thereto for operation in a multitude of speed ranges. The directional control system includes an electrical power source, and a directional selector that is movable to any of three different positions corresponding to forward, neutral, and reverse modes of operation for the implement. The directional control system includes a controller having forward and reverse actuators for conditioning the transmission assembly for operation in forward and reverse modes. The controller is also capable of conditioning the transmission assembly for operation in a neutral mode. An electrical system is connected between the power source and the controller for deriving the control signals used to condition the implement. The electrical system includes a sensor assembly for monitoring the position of the directional selector and for applying control signals to the controller as a function of the position of the directional selector. The electrical system further includes logic circuitry for permitting the actuators to condition the transmission assembly as long as the direction selector is positioned in a neutral position prior to its movement to either the forward or reverse positions. The electrical system further includes a starting circuit and logic circuitry for preventing starting of the engine until the directional selector is in a neutral position. The directional control system of the present invention is further configured to require purposeful movement of the directional selector before the implement will change between various modes of operation.
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Jacobson Eric D.
Price Ralph D.
Case Corporation
Ta Khoi Q.
Wright Dirk
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