AUTOMATIC FLOW CALIBRATION FOR LOCOMOTIVE AIR BRAKE SYSTEM

摘要

A system and method for automatically calibrating the flow measurement device of a locomotive air brake control system. The air brake control computer controls activates a magnet valve to create a predetermined flow from the brake pipe through an orifice to exhaust, thereby creating a reference flow value to enable the calibration of the flow measurement device. The system reduces the likelihood of human error and variability by automating the steps necessary for flow measurement calibration under computer control.

主权项

1. A system for automatically calibrating flow measurements in an air brake system comprising:
a magnet valve for selectively coupling a source of brake pipe pressure to an exhaust via an orifice having a predetermined diameter; a flow measurement assembly for outputting a signal representing volumetric air flow between a source of main reservoir pressure and the brake pipe pressure; and a controller coupled to the magnet valve and programmed to calibrate the signal of the flow measurement assembly based on volumetric air flow through the orifice when the magnet valve couples the brake pipe pressure to the exhaust.