Abstract

A variable displacement electro-hydraulic pump is operated in a closed loop position control circuit. The adjusting pistons at the adjusting member of the pump are controlled for that purpose by a control valve (20) that in turn is driven by a control amplifier (28). The adjustment path of the control valve and the adjustment path of the adjusting member of the pump are supplied as real values to this control amplifier (28). In addition, an adjusting signal that depends on the angle of rotation of the pump is generated at the control amplifier. This additional pulse-shaped adjusting signal allows the oscillating effects of the driving unit forces on the hydraulic fixation, as well as the resulting noises to be compensated.

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Cited By (7)

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    DE-102013201266-A1July 31, 2014Zf Friedrichshafen AgMethod for increasing efficiency of adjustable hydraulic pump of gear box, involves driving gear box by comparing delivery rates of pump to reach current demand for oil and shortening switching times by reducing pressure break-down
    DE-102015219990-A1April 20, 2017Zf Friedrichshafen AgVerfahren zum Betreiben einer Pumpenanordnung mit einer Verstellpumpe
    DE-19602729-C2March 01, 2001Mannesmann Vdo AgVerfahren und Anordnung zur Ansteuerung einer elektrohydraulischen Druckversorgung für eine Hilfskrafteinrichtung eines Kraftfahrzeuges
    DE-19828752-A1December 30, 1999Bosch Gmbh RobertRegelanordnung für ein hydraulisches System
    EP-0884476-A2December 16, 1998Robert Bosch GmbhCircuit de contrÔle de pression de sécurité pour une pompe hydraulique radiale ou axiale à cylindrée variable ou une machine à cellules semi-rotatives
    EP-0884476-A3February 03, 1999Robert Bosch GmbhPressure limiting control circuit for the safe operation of a variable displacement radial or axial hydraulic piston pump or vane cell machine
    WO-9624766-A1August 15, 1996Robert Bosch GmbhVerstellbare hydrostatische pumpe