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EnglishTrains brakes are pneumatically actuated and use the same pneumatic line for power and signal transmission. This simple architecture presents limits for long trains since the last vehicles brakes receive a very delayed command and the train speed must be limited. Solutions were proposed using a signal transmission line parallel to the pneumatic line. These systems, though effective, present drawbacks and are of difficult implementation as retrofits. A solution is described, which leaves the braking system unchanged, but reduces the time delay in the signal transmission by adding a pneumotronic unit at the pneumatic line end. This unit analyzes the pressure time history, recognizes the precursors of new braking commands and issues inputs to a valve at the pneumatic line end mirroring the commands to the master valve. The rapidity of the braking action is enhanced, thereby allowing a more uniform braking and a speed increase of long freight trains.
An autonomous pneumotronic system for enhancing the braking capability of long freight trains / JACAZIO G; GASTALDI L.. - 2(2009), pp. 833-840. ((Intervento presentato al convegno ASME 2009 DSCC Dynamic Systems and Control Conference tenutosi a Hollywood (USA) nel October 12–14, 2009.
| Titolo: | An autonomous pneumotronic system for enhancing the braking capability of long freight trains |
| Autori: | |
| Data di pubblicazione: | 2009 |
| Abstract: | Trains brakes are pneumatically actuated and use the same pneumatic line for power and signal tra...nsmission. This simple architecture presents limits for long trains since the last vehicles brakes receive a very delayed command and the train speed must be limited. Solutions were proposed using a signal transmission line parallel to the pneumatic line. These systems, though effective, present drawbacks and are of difficult implementation as retrofits. A solution is described, which leaves the braking system unchanged, but reduces the time delay in the signal transmission by adding a pneumotronic unit at the pneumatic line end. This unit analyzes the pressure time history, recognizes the precursors of new braking commands and issues inputs to a valve at the pneumatic line end mirroring the commands to the master valve. The rapidity of the braking action is enhanced, thereby allowing a more uniform braking and a speed increase of long freight trains. |
| ISBN: | 9780791848937 |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Paper 2515.pdf | 2. Post-print / Author's Accepted Manuscript | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2285658
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