Arrangement for enhancing the bail-off function of brake cylinde

Details Arrangement for enhancing the bail-off function of brake cylinde Arrangement for enhancing the bail-off function of brake cylinde

1992-08-13

1994-02-15

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Multiple control

Fluid and electric

303 16, B60T 1368

Patent

active

052860965

ABSTRACT:
An arrangement for enhancing a bail-off function a railway vehicle comprising, a non-recoverable bail-off circuit for supplying an output signal to a brake cylinder calculation circuit when a bail-off condition a freight operating mode, a drop in brake pipe pressure is present, and an emergency brake state is absent, a recoverable bail-off circuit for supplying an output signal to the brake cylinder calculation circuit when a bail-off condition and an emergency brake state is present, the brake cylinder calculation circuit supplying an automatic brake cylinder demand signal on one input of a relay valve emulation circuit and receiving an independent brake cylinder demand signal on another input of, the relay valve emulation circuit which supplies output signal to a feedback control circuit producing output signals which are supplied to an application valve and a release valve for controlling the level of air pressure in an air brake cylinder, and a transducer for sensing and feeding back a signal corresponding to the pressure in the air to the brake cylinder feedback control circuit so as to appropriately energize to control the application and release valves.

REFERENCES:
patent: 4306752 (1981-12-01), Brandt
patent: 4509801 (1985-04-01), Newton et al.
patent: 4904027 (1990-02-01), Skartar et al.
patent: 5090780 (1992-02-01), Powell
patent: 5104203 (1992-04-01), Ferri
patent: 5172316 (1992-12-01), Root et al.
patent: 5192118 (1993-03-01), Balukin et al.

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