Method for controlling a hydraulic activation unit

Details Method for controlling a hydraulic activation unit Method for controlling a hydraulic activation unit

F - Mech Eng,Light,Heat,Weapons

15

B

F15B 21/00 (2006.01) F15B 11/02 (2006.01) F15B 11/08 (2006.01) F15B 21/14 (2006.01)

Patent

CA 2423222

The invention relates to a method for controlling a hydraulic activation unit such as is used in conjunction with the use of two hydraulic transformers per hydraulic cylinder, in particular for construction machinery. The integration of hydraulic transformers into a hydraulic circuit is intended to permit the otherwise unused potential and kinetic energy of activation elements of the hydraulic unit to be recovered during their resetting movements into the pressure lines as additionally available pressure. Here, the hydraulic trans- formers are supplied with the corresponding actuation signals by the controller in accordance with the respective requests to the hydraulic activation unit. The actuation signals bring about adjustment of the hydraulic transformers which bring about changes in the strength and direction of the volume flow. The volume flows themselves act on the hydraulic cylinder, or else alternatively on a hydraulic motor which then brings about the movement of the actuator.

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