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[CN 201610320103.5] Device and method for controlling hydraulic machinery
[CN 201610320103.5] Device and Method for Controlling Hydraulic Machinery Title: Device and Method for Controlling Hydraulic Machinery Application Number: CN 201610320103.5 Applicant: Danfoss Power Systems Co., Ltd. Application Date: 2016-5-13 Patent Type: Invention Application The present invention relates to a hydraulic machine, in particular to a hydraulic motor with two working pipelines, a high-pressure pipeline branches off from one working pipeline, and the low pressure line branches off from the other working line. An electronic control unit and a servo displacement unit are provided to control the displacement of the displacement capacity of the drive mechanism of the hydraulic machine, wherein the displacement capacity can be determined by the displacement of the servo plunger within the servo displacement unit. For this purpose, the servo plunger can be charged at least on one side via a servo pressure line with a hydraulic fluid under servo pressure, wherein the servo pressure level can be set by a control plunger which is movably arranged in the control valve. To this end, hydraulic fluid from the low-pressure line or perhaps hydraulic fluid from the high-pressure line can be led to the servo pressure line through the control valve if a suitable control signal is available at the switching valve.
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