Device for controlling the lift of a hydraulically operated valv

Details Device for controlling the lift of a hydraulically operated valv Device for controlling the lift of a hydraulically operated valv

1990-05-21

1991-10-22

Michalsky, Gerald A.

Fluid handling

Processes

60583, 60584, 239 96, 239124, 251 57, F16K 3112

Patent

active

050586149

ABSTRACT:
In a device for controlling the lift of a hydraulically operated valve comprising an actuating element which is pressure-loaded or spring-loaded in closing direction and which acts as the boundary of an actuating chamber in the valve cage, and further comprising a pressure-generating unit, the valve lift is made continuously adjustable, independent of the control times of the valve, by providing that a flying setting plunger be used, which is guided in a cylinder, and which bounds a pressure from the actuating chamber in the valve cage, and by further providing that the pressure-generating unit have a high pressure line controlled by a valve and leading into the pressure chamber, as well as a low pressure line controlled by another valve and leading into the actuating chamber, the setting plunger being pressed against a stop in the cylinder during maximum valve lift.

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