Research on Braking Systems of Railway Vehicles
A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Vehicle Engineering".
Deadline for manuscript submissions: closed (30 August 2024) | Viewed by 1916
Special Issue Editor
Special Issue Information
Dear Colleagues,
The most essential components of rolling stock are the braking systems that directly influence driving safety. Their main task is to control vehicular speed reduction until stoppage during the final braking phase with safe halting. In other words, the braking system is a set of mechanisms that enables a reduction in the driving speed and stops vehicles. Each brake system consists of two separate groups of associated together components, i.e., brake mechanisms and brake-actuating mechanisms (control mechanisms).
Brakes work by generating a force opposite to the direction of travel, which causes the vehicle to decelerate. This is possible through friction by pressing brake pads against the running surfaces of the wheels or dynamic braking using electrodynamic or hydrodynamic brakes.
Depending on the type of railway vehicle in question, there are various brake operation control systems and different brake types. However, each railway vehicle must be equipped with brakes to ensure the following functional properties: service brake function during operation for service and emergency braking and parking brake function when the train is stationary, providing braking force without onboard energy being available for an unlimited period.
Each brake control system of a given railway vehicle must have three control modes:
- emergency braking: application of a specified braking force within a specified maximum reaction time to stop the train with a specified braking efficiency;
- service braking: application of a regulated braking force to control the speed of the train, including stopping and temporary immobilization;
- parking braking: use of a braking force to keep the train (or vehicle) permanently immobilized in a stationary position without transferring energy available onboard.
A structurally separate group consists of retarders (long-lasting brakes). Their construction is usually can be based on an engine structure or chassis. There are two design varieties of chassis retarders: hydrokinetic and electromagnetic retarders.
Both service and emergency braking can be controlled simultaneously, as well as parking and emergency braking. However, it is unacceptable to control the service and parking brakes together.
The development of braking systems for high-speed railways provides, among other things, brake control via electrical systems and digital technology alone, the replacement of classic distribution valves by local brake controllers, and the application of electric safety loops.
Authors who wish their research to be included in a Special Issue on "Research on Braking Systems of Railway Vehicles" on the topics indicated above are encouraged to participate.
Dr. Jacek Jackiewicz
Guest Editor
Manuscript Submission Information
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Keywords
- railway braking system
- emergency braking
- service braking
- parking braking
- brake control system
- long-lasting brake
- braking system for high-speed railways
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