Sauer Danfoss Aps

Minibooster Hydraulics A/s

Knud Meldgaard Jensen

Carl Christian Dixen

Svend Erik Thomsen

Poul Ennemark

Tom Tychsen

Leif Hansen

Christen Espersen

Hans Jørgen Jensen

Brian Petersen

Joergen Mads Clausen

Joergen P Todsen

Steen Slot

Svend Giversen

Smari Johannsson

Henrik Kjer Kristiansen

Jan Maibøll Buhl

A hydraulic system () is provided comprising a supply port arrangement (P, T), a working port arrangement (A, B), and a booster section (), said supply port arrangement having at least a supply port (P), said booster section () being arranged between said supply port arrangement (P, T) and said working port arrangement (A, B). The operational possibilities of such a hydraulic system should be extended. To this end said working port arrangement comprises at least two working ports (A, B), flow direction changing means () are provided changing a flow direction through said working port arrangement and inactivating means () are provided inactivating or activating said booster section () for each flow direction.

Hydraulic system

The invention concerns a hydraulic control () with a supply connection arrangement () having a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement having two working connections (A, B) connectable with a consumer, a control valve () with a valve element () between the supply connection arrangement and the working connection arrangement and a compensation valve (), which is located between the high-pressure connection (P) and the control valve () and is acted upon in the closing direction by a pressure between the compensation valve () and the control valve (). It is endeavoured to ensure the most favourable energy consumption possible. For this purpose, in the opening direction the compensation valve () is acted upon by a pressure of a selection device (), which optionally supplies the compensation valve () with a pressure control pressure or a flow control pressure.

Hydraulic control

The invention concerns a hydraulic valve arrangement () with a control valve module () comprising a supply connection arrangement with a high-pressure connection (P) and a low-pressure connection (T) and a working connection arrangement with two working connections (A, B) as well as a control valve () between the supply connection arrangement and the working connection arrangement. It is endeavored to improve the control behavior of the valve arrangement. For this purpose. it is ensured that the control valve module () has a return compensation valve () between the control valve () and at least one working connection (A, B).

Hydraulic valve arrangement

A hydraulic control system () has a hydraulic motor (), which is connected with a control valve () via two working lines (), the control valve () being connected with a low-pressure connection (T) and, via a compensation valve (), with a high-pressure connection (P), to ensure that a return compensation valve () is arranged in each working line, each return compensation valve () having a nominal flow line (), which extends unintersectedly in relation to the nominal flow line () of the compensation valve ().

Hydraulic control system

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Augustenborg, Denmark

Knud Meldgaard Jensen