Hydraulic control system for a mobile work machine, especially a wheel loader
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United States of America Patent
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-
Jul 17, 2001
Grant Date -
N/A
app pub date -
Sep 16, 1999
filing date -
Mar 21, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An hydraulic control arrangement which is chiefly used for a mobile working machine, especially for a wheel loader, and has at least one hydraulic cylinder with the aid of which a working tool can be moved, a directional control valve for controlling the pressure-fluid channels between the hydraulic cylinder, a pressure-fluid source and a tank, a hydraulic accumulator which can be connected to the pressure-fluid source via a filling line, and a control valve with the aid of which a connection between the hydraulic accumulator and the hydraulic cylinder can be controlled to open and close. The aim of such a hydraulic control arrangement is to avoid undesired movements of the hydraulic cylinder. This is achieved wherein the fact that the hydraulic accumulator can be filled up only when the directional control valve is actuated.
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