A train mounted system for the controlled addition of water to one or more of the wheel rail contact points 3 of a train in conditions of low wheel rail friction characterised in that the addition of water increases the wheel rail traction coefficient to at least 0.1 at speeds below 50kph. The water delivery rate may be constant or may vary, possibly in relation to train speed. The temperature and/or the pH of the water added to the contact point 3 may be controlled. The water added to the contact point 3 may be heated. The system may comprise a water store 7, pump 6, controller and delivery nozzles 5. The system may be activated by a control signal when a low adhesion event is detected or when the train is braked. The water used may be from on-train water resources, waste water, atmospheric water vapour and/or rain water. There may be a control valve 9 and accumulator 10.


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    Title :

    System for increasing wheel rail friction in low adhesion conditions


    Contributors:

    Publication date :

    2017-09-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS / B61C Lokomotiven , LOCOMOTIVES



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    COOKE JOHN / BARNARD SIMON | European Patent Office | 2024

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    Wheel-rail adhesion

    Marta, H.A. / Mels, K.D. | Engineering Index Backfile | 1969