Air braking force supplement method for urban rail vehicle

Abstract

The invention discloses an air braking force supplement method for an urban rail vehicle. The air braking force supplement method comprises the following steps that a rail vehicle control unit calculates the total braking force F<T> required by the whole urban rail vehicle, the F<T>=m*a*b<d>, electric braking force is applied to a traction control unit through the F<T>, wherein a is the grade of the urban rail vehicle, and m is a loading parameter, and b<d> is an amplification coefficient of network delay when the situation that the traction control unit plays the electric braking force is considered; a braking control unit calculates the air braking force F needing to be supplemented, wherein F=F-F<D>*b, F is total braking force which is calculated by the braking control unit and required by the whole urban rail vehicle, F<D> is electric braking force actually played by the traction control unit of the urban rail vehicle, and b is an amplification coefficient. According to the air braking force supplement method for the urban rail vehicle, the effect that the electric braking force of the urban rail vehicle during service braking is sufficiently played can be ensured, abnormal supplement during air braking is reduced, accordingly, the service of a brake block / brake pad of the urban rail vehicle is prolonged, and the maintenance cost of the whole urban rail vehicle is reduced.

Description

technical field [0001] The invention relates to the technical field of rail vehicle braking, in particular to a method for suppressing abnormal supplementary air braking force during normal braking of subway vehicles. Background technique [0002] The common braking force management method during braking is that the train control unit calculates the total braking force required by the train according to the train braking level and load parameters, and controls the distribution of the electric braking force; The electric braking force is used to calculate the air braking force that needs to be applied, and then distribute it to each bogie of the train or preferentially and evenly distribute it to the bogies of the trailer and the faulty motor car. Due to the difference in response time between the electric brake and the air brake, the total train braking force calculated by the brake control unit is larger than the total train braking force calculated by the train control uni...

AI Technical Summary

Problems solved by technology

Due to the difference in response time between electric braking and air braking, the total braking force of the train calculated by the braking control unit is larger than that calculated by the train control unit. In the case that the braking demand of the whole vehicle is already sufficient, the brake control unit will still supplement the air braking force; The brake control unit will add more air brake force

Excessive air braking force will lead to abnormal wear of train brake shoes / brake pads, increasing vehicle cost