Next Article in Journal
Virtual and Physical Prototyping in Mechanical Shock Test of an EV Battery Module
Previous Article in Journal
The Influence of Corrosion of Steel Reinforcement on the Shear Strength of Existing Structure and 2nd Degree Pre-Earthquake Inspection
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Engineering Proceedings
Volume 121
Issue 1
10.3390/engproc2025121013
engproc-logo
Submit to this Journal
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Proceeding Paper

Investigation of the Influence of Distributor Valve Position on Longitudinal Train Dynamics During Braking †

by
Stefan Krastev
1,*,
Svetoslav Slavchev
1,
Vladislav Maznichki
1,
Petko Sinapov
2 and
Magdalen Velev
3
1
CoE “National Center of Mechatronics and Clean Technologies”, Technical University of Sofia, 1000 Sofia, Bulgaria
2
Department of Mechanics, Faculty of Transport, Technical University of Sofia, 8 Kliment Ohridski Blvd., 1000 Sofia, Bulgaria
3
Department of Railway Engineering, Faculty of Transport, Technical University of Sofia, 8 Kliment Ohridski Blvd., 1000 Sofia, Bulgaria
*
Author to whom correspondence should be addressed.
†
Presented at the 17th International Scientific Conference on Aerospace, Automotive, and Railway Engineering (BulTrans-2025), Sozopol, Bulgaria, 10–13 September 2025.
Eng. Proc. 2026, 121(1), 13; https://doi.org/10.3390/engproc2025121013
Published: 13 January 2026
(This article belongs to the Proceedings of The 17th International Scientific Conference on Aerospace, Automotive, and Railway Engineering)
Browse Figures
Versions Notes

Abstract

The distributor valve is one of the most important components in the pneumatic braking system of trains. It performs the functions of filling and releasing the brake cylinder. The distributor valve most widely used on Bulgarian railways operates in two positions, respectively, in “freight train” mode (G) and in “passenger train mode” (P). The difference between them is determined by the different times for filling and emptying the brake cylinder. These times affect the moment of engagement of the braking system of each wagon in the train composition. This has a significant impact on the longitudinal forces obtained in the couplers. This paper is dedicated to the analysis of the influence of the distributor valve position on the longitudinal forces. A simulation study of the longitudinal behavior of a train set was carried out in Simulink®, which consists of a locomotive and 43 freight wagons attached to it, with 80 t gross mass of each wagon. The railway cars are linked by elastic elements with nonlinear characteristics. The results represent the distribution of longitudinal forces in time. They are used for the investigation of the longitudinal dynamics of the train, with the aim of improving the running-dynamic qualities of the train during braking.
Keywords: brake system; distributor valve; simulation; coupler force brake system; distributor valve; simulation; coupler force

Share and Cite

MDPI and ACS Style

Krastev, S.; Slavchev, S.; Maznichki, V.; Sinapov, P.; Velev, M. Investigation of the Influence of Distributor Valve Position on Longitudinal Train Dynamics During Braking. Eng. Proc. 2026, 121, 13. https://doi.org/10.3390/engproc2025121013

AMA Style

Krastev S, Slavchev S, Maznichki V, Sinapov P, Velev M. Investigation of the Influence of Distributor Valve Position on Longitudinal Train Dynamics During Braking. Engineering Proceedings. 2026; 121(1):13. https://doi.org/10.3390/engproc2025121013

Chicago/Turabian Style

Krastev, Stefan, Svetoslav Slavchev, Vladislav Maznichki, Petko Sinapov, and Magdalen Velev. 2026. "Investigation of the Influence of Distributor Valve Position on Longitudinal Train Dynamics During Braking" Engineering Proceedings 121, no. 1: 13. https://doi.org/10.3390/engproc2025121013

APA Style

Krastev, S., Slavchev, S., Maznichki, V., Sinapov, P., & Velev, M. (2026). Investigation of the Influence of Distributor Valve Position on Longitudinal Train Dynamics During Braking. Engineering Proceedings, 121(1), 13. https://doi.org/10.3390/engproc2025121013

Article Metrics

Back to TopTop