Fluid-pressure and analogous brake systems – Electric control
Patent
1992-08-13
1995-01-31
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Electric control
303 3, 303 15, B60T 1368
Patent
active
053853920
ABSTRACT:
A recoverable bail-off circuit and a direct release and non-recoverable bail-off circuit for enhancing the bail-off function of the air brake pressure on a railway locomotive including a first logic circuit for ascertaining when a non-recoverable bail-off command is present by determining the presence of a manual bail-off signal or the presence of a dynamic bail-off signal and by determining the absence of an emergency brake signal, an electronic and logic circuit for ascertaining when a direct release command is present by determining a freight/passenger mode signal and that a present brake pipe pressure signal is greater than a previous brake pipe pressure signal by a certain pressure and a second logic circuit for ascertaining when a recoverable bail-off command is present by determining the presence of the manual bail-off signal or the presence of a dynamic bail-off signal and determining the presence of the emergency brake signal.
REFERENCES:
patent: 5172316 (1992-12-01), Root et al.
patent: 5192118 (1993-03-01), Balukin et al.
patent: 5222788 (1993-06-01), Dimsa et al.
Graham Matthew C.
Sotak John B.
Westinghouse Air Brake Company
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