Brake system with graduated empty/load

Abstract

A load sensing system for a rail car brake system, including at least two load sensing devices connected in series. The first load sensing device receives a brake signal from the brake control valve and provides a first braking signal for loads above a first value. It provides a second braking signal less than the first braking signal for loads below the first load value. The second load sensing device receives the first and second braking signals from a first load sensing device. It provides a third braking signal to the brake cylinder for loads above the second value and different from the first value and a fourth braking signal less than the third braking signal for loads below the second value. For loads above the first and second load values, the first and third braking signals are equal to the brake signal. For loads above the second value, the third braking signal is equal to the received first or second braking signal.

Dependencies are inferred from the claim text.