Stabilized speed-control system for a hydrostatic transmission

Details Stabilized speed-control system for a hydrostatic transmission Stabilized speed-control system for a hydrostatic transmission

1993-08-31

1994-10-18

Look, Edward K.

Power plants

Pressure fluid source and motor

Methods of operation

60395, 60427, 60494, F16D 3100, F16D 3102

Patent

active

053556755

ABSTRACT:
A hydrostatic rotary power transmission system that provides a stable rotation rate at very slow rotation speeds is provided. The system operates in two speed control modes, one being a normal mode for use in the rotation rate range of 50 rpm to the maximum rated speed and a second or fine speed control mode for use in the rotation range of <1.0 to 250 rpm. In the normal control mode, the rotation speed is a function of the displacement of the hydrostatic pump. In the fine speed control mode, the motor rotation rate is a function of the flow rate through a proportional-flow valve that is downstream of the motor.

REFERENCES:
patent: 4194365 (1980-03-01), Stoufflet et al.
patent: 4240255 (1980-12-01), Benilan
patent: 4434972 (1984-03-01), Charles
patent: 4475163 (1984-10-01), Chandler et al.
patent: 4653271 (1987-03-01), Reeves et al.
patent: 4694649 (1987-09-01), Howeth
patent: 4727718 (1988-03-01), Koopmans
patent: 4958494 (1990-09-01), Maki et al.
patent: 5048294 (1991-09-01), Oshina et al.
patent: 5048295 (1991-09-01), Hoscheler

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