Electro-pneumatic freight brake control system

Details Electro-pneumatic freight brake control system Electro-pneumatic freight brake control system

1994-03-14

1995-02-28

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Multiple systems

Fluid pressure and electric

303 15, 303 86, 303 29, 36442601, B60T 1370

Patent

active

053931297

ABSTRACT:
An electro-pneumatic brake system for a railroad freight car is integrated with the existing pneumatic freight brake system by utilizing the air stored in the emergency reservoir to supply brake cylinder pressure via the exhaust passage of the pneumatic control valve, which is maintained in release position during electro-pneumatic brake operation. The electro-pneumatic brake system fails to a release mode, so that the brakes on an individual car that experiences a power loss do not apply. In the case of a power loss in the electro-pneumatic system, due to a train break-in-two, the pneumatic brake system is automatically operated by the consequent loss of brake pipe pressure to provide a back-up brake, while at the same time interrupting the control valve exhaust path via which the electro-pneumatic brake is communicated with the brake cylinder.

REFERENCES:
patent: 4344138 (1982-08-01), Frasier
patent: 4904027 (1990-02-01), Skantar et al.
patent: 4978179 (1990-12-01), Balukin
patent: 5020862 (1991-06-01), Balukin et al.
patent: 5064251 (1991-11-01), Romansky
patent: 5090780 (1992-02-01), Powell
patent: 5222788 (1993-06-01), Dimsa et al.
patent: 5286096 (1994-02-01), Ferri et al.
DeLeon et al., Electro-Pneumatic Brakes and Other Concepts Being Developed at the University of New Hampshire, Aug. 1992.

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