A HYDRAULIC SYSTEM

A HYDRAULIC SYSTEM

The invention relates to a hydraulic system (12) for a working machine (1). The hydraulic system (12) is a load sensing (LS) system and comprises a hydraulic actuator (18) for movement of an implement and a control valve (15) having an inlet valve (16a, 16b) and an outlet valve (17a, 17b) for contro...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: VIGHOLM, Bo
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BLASTING
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
DREDGING
FIXED CONSTRUCTIONS
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
FOUNDATIONS
HAULING
HEATING
HOISTING
HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD
HYDRAULIC ENGINEERING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIFTING
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
SOIL SHIFTING
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
TRANSPORTING
WEAPONS
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Beschreibung
Zusammenfassung:The invention relates to a hydraulic system (12) for a working machine (1). The hydraulic system (12) is a load sensing (LS) system and comprises a hydraulic actuator (18) for movement of an implement and a control valve (15) having an inlet valve (16a, 16b) and an outlet valve (17a, 17b) for controlling the flow of hydraulic fluid from a pump (13) to the hydraulic actuator (18) and for draining hydraulic fluid from the hydraulic actuator (18), respectively. The hydraulic system also comprises a means (44) for determining the load (19) on the hydraulic actuator (18). The hydraulic system (12) further comprises a valve (24) for disconnecting the flow of hydraulic fluid from the pump (13) to the hydraulic actuator (18), while allowing another flow of hydraulic fluid to the hydraulic actuator (18), provided that the determined load on the hydraulic actuator (18) exceeds a threshold value.