Automatic Release Hand Brake Control System

摘要

In a rail vehicle hand brake having a release activated by a pneumatic cylinder, the present control system includes a manual valve having an output connected to a source of pressure at an input when manually activated. A volume is to be charged by the source of pressure. A choke connects the volume to exhaust. The volume and the choke prolong the time the source of pressure is connected to the pneumatic cylinder after the manual valve is activated.

主权项

1. In a rail vehicle hand brake having a release activated by a pneumatic cylinder, a control system comprises:
a manual valve having an output and being connected to a source of pressure at an input when manually activated; a volume to be charged by the source of pressure; a first pneumatic valve having a pilot port connected to the volume and having an output connected to the source of pressure at an input when the volume is charged to a predetermined pressure to activate the first pneumatic valve and after the manual valve is activated; the output of the first pneumatic valve being connected to the pneumatic cylinder; and a first choke connecting the volume to exhaust; whereby the volume and the first choke prolong the time the source of pressure is connected to the pneumatic cylinder after the manual valve is activated.