Study on a segmented electro-pneumatic braking system for heavy-haul trains
| Autor: | Xubao Zhao, Jun Zhang, Yuan Zhang, Wei Wei, Yong Jiang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Control and Systems Engineering
Computer science 020208 electrical & electronic engineering Braking system 0202 electrical engineering electronic engineering information engineering Train 02 engineering and technology 010502 geochemistry & geophysics Safety Risk Reliability and Quality 01 natural sciences Engineering (miscellaneous) Automotive engineering 0105 earth and related environmental sciences |
| Zdroj: | Transportation Safety and Environment. 2:216-225 |
| ISSN: | 2631-4428 |
| Popis: | The large longitudinal impact of heavy-haul trains is the main factor limiting their development, and the asynchronous nature of train-braking systems is the main cause of this longitudinal impact. In this paper, a segmented electro-pneumatic braking solution fully compatible with the existing freight-train braking system in China is proposed to improve the synchrony of train-braking systems. A simulation model for this braking system is developed based on air-flow theory, the 120 distribution valve and electronic control devices. The braking characteristics obtained from simulations are compared to those from the train-brake testing platform, and show high fidelity. On this basis, the effects of the new braking system on the braking capacity and longitudinal impact of a 20 000 t heavy-haul train are analysed by further simulation. The results show that during service brakes, the segmented electro-pneumatic braking system can increase the braking capacity by 4.2–24.7% and reduce the coupler force by 21.6–68.0%. Therefore, it can be seen that the segmented electro-pneumatic braking system is a new type of electro-pneumatic brake that meets the needs of the Chinese railway network. It solves the problem of the longitudinal impact of heavy-haul trains satisfactorily, and its compatibility with the existing braking system (resulting in a reduced modification workload) makes it possible to maintain normal operations on heavy-haul lines while trains undergo modification. |
| Databáze: | OpenAIRE |
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