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Mechatronic controller of brake pipe pressure

Jakubowski Andrzej, Kaluba Marian, Goliwąs Damian

Pojazdy Szynowe

2023

Nr 1-2

8-13

In this article mechatronic controller of brake pipe pressure was presented being the result of research and development work carried out at the Center of Rail Vehicles in Poznań. This function is performed by the module using binary voltage signals. Its structural structure and functionality are described and the results of empirical research are presented. The analysis of the research results indicates that the developed module can be used in the control systems of the railway air brake.

Adsorption dryer for use in railways

Matusiak Kacper, Goliwąs Damian, Kaluba Marian

Pojazdy Szynowe

2022

Nr 1-2

77--85

Pneumatic brake, which use compressed air as a working medium, is the main brake of rail vehicles. The equipment used in the braking system requires sufficiently clean, without water vapour medium to work properly. Removing water vapour from the air prevents condensation and ice formation during winter, which guarantees correct brake operation. For this purpose, adsorption dryers are used in the railways to ensure the required pressure dew point value. This article includes an overview of available compressed air drying methods, the results of calculations and bench test of the dryer prototype developed at the Institute. Assumptions and requirements for the device intended for use in railways are based on European standards and UIC cards.

A tool for calculating braking distances of rail vehicles

Kustosz Joanna, Goliwąs Damian, Kaluba Marian

Pojazdy Szynowe

2022

Nr 3-4

15--19

In the article a tool for calculating the braking distance of rail vehicles developed as part of R&D project conducted at the Institute of Rail Vehicles in Poznan (Poland) was presented. The tool used high-level programming language – Python for determining the braking distance of railway vehicles in accordance with the algorithm presented in the EN 14531 standard. The developed tool takes into account the theoretical curve of pressure build-up in the brake cylinder and the variability of the friction coefficient with time during the braking process. The paper presents the results of calculating the braking distance of the electric multiple unit.