Hydraulic drive system

In a hydraulic drive system, first and second multi-control valves are connected to first and second hydraulic pumps. A first regulator adjusts a tilting angle of the first hydraulic pump in a manner to decrease a discharge flow rate of the first hydraulic pump in accordance with an increase in a di...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Fukumoto, Takuya, Muraoka, Hideyasu, Kondo, Akihiro
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:In a hydraulic drive system, first and second multi-control valves are connected to first and second hydraulic pumps. A first regulator adjusts a tilting angle of the first hydraulic pump in a manner to decrease a discharge flow rate of the first hydraulic pump in accordance with an increase in a discharge pressure of the first hydraulic pump and an increase in a first power shift pressure. A second regulator adjusts a tilting angle of the second hydraulic pump in a manner to decrease a discharge flow rate of the second hydraulic pump in accordance with an increase in a discharge pressure of the second hydraulic pump and an increase in a second power shift pressure. The first power shift pressure is set by a first proportional valve, and the second power shift pressure is set by a second proportional valve.