RAIL VEHICLE BRAKING AUTOMATIC CONTROLLER Russian patent published in 2007 - IPC B60T8/18 B61H13/30 B60T15/00 

FIELD: railway transport.

SUBSTANCE: invention relates to devices for control of pressure in brake cylinder of rail vehicle depending on car load. Freight mode automatic controller has damping piston consisting of two pistons with throttling holes and valves, one being fixed on rod, the other being movable on is spring-loaded. Spaces under and over fixed piston are fully filled with liquid, and space over movable pistons is filled, but partially. Shank of rod is located in space separated from space under fixed piston by seal communicating with space movable spring-loaded piston through hole inside rod. Travel of housing relative to fixed piston remains within the limits of required conditions of operation of pressure relay.

EFFECT: provision of quick and effective damping and reliable automatic operation.

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