EP 0471166 B1 19940518 - Control apparatus for regulating the delivery flow rate setting of several hydrostatic adjustable pumps.
Title (en)
Control apparatus for regulating the delivery flow rate setting of several hydrostatic adjustable pumps.
Title (de)
Regelvorrichtung zur Regelung der Fördervolumeneinstellung mehrerer hydrostatischer Pumpen.
Title (fr)
Dispositif de contrÔle pour le réglage de l'ajustement du débit de plusieurs pompes hydrostatiques réglables.
Publication
Application
Priority
DE 4025638 A 19900813
Abstract (en)
[origin: US5226289A] The invention relates to a control system for automatically regulating the displacement setting of a plurality of variable-displacement hydrostatic pumps that are connected in parallel, each via a respective working pressure line, to a common consumer line and are each connected to a respective adjusting device that can be acted on by an adjusting pressure, each of said adjusting device having associated with it a pilot valve that is acted on towards a regulating position, against a counter-pressure, by a first control pressure corresponding to the pressure in the working pressure line of the respective pump and by a second control pressure corresponding to the displacement setting of the associated pump, and which in the control position regulates the setting pressure acting on the adjusting device to reduce the displacement of the associated pump. To reduce the constructional outlay and to enable the individual pumps to be regulated to the same actually required outputs despite disturbing factors, according to the invention said second control pressure (pQi) is taken off before a throttle in the working pressure line of the respective pump and acts on the associated pilot valve via a control pressure line towards the control position.
IPC 1-7
IPC 8 full level
F04B 49/08 (2006.01)
CPC (source: EP US)
F04B 49/08 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
DE 4025638 C1 19911205; DE 59101655 D1 19940623; EP 0471166 A1 19920219; EP 0471166 B1 19940518; US 5226289 A 19930713
DOCDB simple family (application)
DE 4025638 A 19900813; DE 59101655 T 19910617; EP 91109890 A 19910617; US 74443191 A 19910813