METHOD OF TESTING THE AUTOMATIC BRAKE SERVICEABILITY Russian patent published in 2014 - IPC B60T13/68 B60T15/36 B61H11/02 

FIELD: transport.

SUBSTANCE: invention relates to railway transport and may be used in brake system of whatever rolling stock. Proposed method consists in using of working rates of brake line pressure drop level for operation of air pressure control valve for braking. Lower rate of pressure drop in used. Spring-loaded engage/release valves are introduced in tail car automatic brake components. Release valve has inner bore to communicate with its working chamber communicated with control channel and zone between opposed facing-point cups. Release valve feed channel is communicated with engage valve control channel communicated with its working chamber while engage valve feed channel communicated with release valve control channel is communicated with brake line via the chamber of connection hose free end. With brake line exhausted, feed channel of engage valve at disengaged state is isolated by said zone between cups. Pressure increase in brake line at charging over preset tolerable level and complete service brake application allows shifting release vale to engaged position. Brake line is communicated via second line with disengage valve feed channel.

EFFECT: automatic unloading of automatic brake line at working rate.

8 dwg