Study on Longitudinal Impulse Law under Braking Condition for Heavy Haul Train with ECP Brake System

This paper studies the time and position of the maximum coupler force of heavy haul train with electrically controlled pneumatic(ECP) system under the ramp change of braking condition, analyzes the causes of longitudinal impulse between vehicles, and studies the transmission law of longitudinal impulse of heavy haul train. The results show that the generation of maximum coupler force is related to ramp and longitudinal impulse transmission. When the initial speed of the train is small and the absolute value of deceleration is small, the main reason for the formation of the maximum coupler force is the influence of the ramp; when the train speed is high or the absolute value of deceleration is large, the main reason for the formation of the maximum coupler force is the longitudinal impulse transmission effect.