B - Operations – Transporting – 61 – H
Patent
B - Operations, Transporting
61
H
342/28
B61H 13/00 (2006.01) B60T 13/58 (2006.01) B60T 13/66 (2006.01) B61H 13/20 (2006.01)
Patent
CA 1337947
A pneumatic pressure control arrangement for controlling the brakes of railway vehicles. A manual brake command controller converts a selected brake position into a corresponding electrical signal. An application magnet valve is connectable to a source of air pressure and to a storage device. A release magnet valve is connectable to atmosphere and to the storage device. An electropneumatic transducer senses the pressure in the storage device and provides a feedback signal. A microprocessor receives and compares the electrical signal with the feedback signal to develop an error signal which initially energizes the application magnet valve and the release magnet valve upon request of braking effort, and which subsequently pulses the application magnet valve when the pressure in the storage device is within a preselected control range, and which finally deenergizes the application magnet valve when the pressure in the storage device is within a preselected deadband range to cause a lap condition.
611799
Sanders Walter J.
Skantar Elmer T.
Macrae & Co.
Westinghouse Air Brake Company
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