Determining train length from locomotive involves measuring pressure, mass flow, temperature in main air line, generating defined pressure change sequence, integrating flows

摘要

The method involves measuring the pressure, mass flow and temperature of the air in the main air line of the train in the locomotive and generating a defined sequence of pressure changes in the main air line with the drivers brake valve or other suitable actuators. The associated flows are integrated, the leakage rate is determined with the main air line pressure constant and the main air line volume derived from these values.