Input torque control for a variable displacement hydraulic trans

Details Input torque control for a variable displacement hydraulic trans Input torque control for a variable displacement hydraulic trans

1981-07-31

1984-07-31

Look, Edward K.

Power plants

Pressure fluid source and motor

Servo-motor having externally operated control valve sets...

60445, 60465, F16H 3946

Patent

active

044622104

ABSTRACT:
A torque control for a drive system having a hydraulic transmission connectable to a prime mover (30) and having a pair of hydraulically-connected displacement devices V and F, with one device having variable displacement, a torque sensor (35) generates a torque signal representative of prime mover output torque in either driving or braking mode, torque demand generators (47,47') generate a torque demand signal selectively in either driving or braking modes, a governor valve (63) compares the torque signals and generates a control signal and a control servo 17, responsive to the control signal, controls the displacement of the variable displacement device V to eliminate any difference in torque signals.

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