Dump valve operational fault-determination system
 A dynamic diagnostic operational dump valve fault-detection system including a first logic network connected to a release reset circuit and to an applied reset circuit, the release reset circuit connected to a release timer circuit and a release flag circuit as well as to a release pressure check circuit, the applied reset circuit connected to an applied timer circuit and to an applied flag circuit as well as to an applied pressure check circuit, the release timer circuit and the release flag circuit connected to a second logic network and to a third logic network, the applied timer circuit and the applied flag circuit connected to the second logic network and to the third logic network, a magnet valve state comparison circuit connected to a fourth logic network, the third and the fourth logic network connected to an error output circuit for recording and displaying a dump valve failure. 
Westinghouse Air Brake Company
G
G01R
inventional
John W. James A.
Drake Wood