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An apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump. The apparatus and method includes a swashplate pivotally attached to the pump, a control servo operable to increase an angle of the swashplate relative to the pump, a biasing servo operable to dec

An apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump. The apparatus and method includes a swashplate pivotally attached to the pump, a control servo operable to increase an angle of the swashplate relative to the pump, a biasing servo operable to decrease the angle of the swashplate relative to the pump, a servo valve having an output port hydraulically connected to the control servo, a divertor line having a first end connected to the pump output port and a second end connected to the biasing servo, and means for controlling the servo valve as a function of the discharge pressure of the pump.

대표청구항 ▼

1. An apparatus for controlling a discharge pressure of a variable displacement hydraulic pump, the discharge pressure being located at a pump output port, comprising:a swashplate pivotally attached to the pump; a control servo operable to increase an angle of the swashplate relative to the pump; a

1. An apparatus for controlling a discharge pressure of a variable displacement hydraulic pump, the discharge pressure being located at a pump output port, comprising:a swashplate pivotally attached to the pump; a control servo operable to increase an angle of the swashplate relative to the pump; a biasing servo operable to decrease the angle of the swashplate relative to the pump; a servo valve having an output port hydraulically connected to the control servo; a divertor line having a first end connected to the pump output port and a second end connected to the biasing servo; and means for controlling the servo valve as a function of the discharge pressure of the pump.