Method for smooth hydrostatic pump/motor transitions

Details Method for smooth hydrostatic pump/motor transitions Method for smooth hydrostatic pump/motor transitions

1995-05-11

1996-12-10

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Methods of operation

60491, 475 76, F16D 3900

Patent

active

055820077

ABSTRACT:
A method is disclosed for providing a smooth power transition between a variable displacement pump and a variable displacement motor when a mechanical feedback is not provided. The method includes sensing and comparing the speeds of the variable displacement pump and the variable displacement motor based on known maximum volumetric displacements and reducing the rate of change of displacement of one of the variable displacement pump or the variable displacement motor when it is determined that the one is near its maximum displacement position and simultaneously initiating a change in displacement of the other thereof. The subject arrangement ensures that there is no detrimental interruptions of power during the transition of changing of displacement of one of the variable displacement pump and the variable displacement motor to changing the displacement of the other one thereof.

REFERENCES:
patent: 3901031 (1975-08-01), Knapp et al.
patent: 4203293 (1980-05-01), Bubula et al.
patent: 4983149 (1991-01-01), Kita

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