SYSTEM AND METHOD FOR CONTROLLING INDEPENDENT METERING VALVE

• Main Authors: AARDEMA JAMES A, KOEHLER DOUGLAS W
• Format: Patent
• Language: English
• Published: 24.11.1998
• Edition: 6
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; WEAPONS

PROBLEM TO BE SOLVED: To change and control the performance of a oil pressure circuit in a software by controlling respective metering valves based on a required speed and utilizable pump flow rate. SOLUTION: A controller 220 receives a direction and speed command and judges a series of proper outputs 230 to the respective metering valves 105 in an independent metering valve 110. The output 230 indicates the current to respective metering valves 105. The controller 220 judges the operation mode of the oil pressure circuit 100 based on the command from the input device 210. The controller 220 arranges respective metering valves 105 in a proper state after finding out the output 230 based on the command from one part of the mode and the input device 210. In the metering state, the controller 220 controls a flow rate passing the metering valve 105 by adjusting a control signal.