Control device for a hydrostatic drive for at least two actuators

US4864822A · kind A · utility

Assignee

• Hydromatik GmbH · DE

Inventors

• Ewald Wachs · Illerkirchberg, DE
• Ludwig Wagenseil · Vöhringen, DE
• Wolfgang Reistle · Langenau, DE

Key dates

• Filing date: Jan 22, 1988
• Grant date: Sep 12, 1989
• Expiry date: Jan 22, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D16/2097
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A control device for a hydrostatic drive for at least two actuators having a variable displacement pump whose adjusting device can be acted on as a function of the displacement and/or of the delivery pressure, wherein a control valve is associated with each actuator in its hydraulic supply line and the delivery flow for each actuator is determined by means of a pressure compensator as a function of the valve preset at the control valve, is simplified while ensuring accurate control. This is achieved by having the adjusting device always set the pump at a displacement which is slightly less than the sum of the actual instantaneous volume flows required by the actuators.