Westinghouse Air Brake Company

Gary L Bailey

Vincent Ferri

Robert D Dimsa

Paul J Kettle, Jr

Daniel J Wolf

Craig A Miller

Gregory S Balukin

Robert J Jenets

Charles L Crawford

Method and apparatus for providing a filtered signal which indicates of a flow of fluid to a fluid pressure communication conduit, the flow being dependent upon the pressure of fluid in a chamber. The pressure in the chamber is controlled by one or more pressure adjusting valves. The invention provides for receiving into a data processing module one or more valve signals indicating open states of the pressure adjusting valve or valves, and also a flowrate signal from a flowrate sensor, which represents the real instantaneous flowrate, and it is this signal which needs to be filtered to remove transients. The invention provides for choosing between a first processing mode and a second processing mode for the flowrate signal. The first processing mode is used when the second processing mode is not in effect, and when neither of the valve signals indicates an open valve. The second processing mode is activated a valve signal indicates an open valve. The second processing mode, when activated, proceeds according to a predetermined procedure and then returns to the first processing mode after no valve signal indicates an open valve. The signal is processed by either the first processing mode or the second processing mode, depending on whether valve signals have been received, and provides the filtered signal as an output to equipment external to the data processing module.

Flow signal filter

An electrically controlled railway locomotive throttle controller including a power source connected to a central processing unit disposed on such locomotive. An encoder device is disposed on such locomotive for providing at least one electrical signal to such central processing unit. This at least one electrical signal being at least one of a signal indicative of a throttle position, a signal indicative of dynamic braking and a signal indicative of a reverser. A digital control device is disposed on such locomotive and is connected to receive a signal from such central processing unit to provide a digital control signal that controls the voltage being applied to a trainline. An analog control device is also disposed on such locomotive and is connected to receive a signal from such central processing unit to provide an analog control signal that controls a dynamic brake reference voltage being applied to such trainline.

Electronically controlled locomotive throttle controller including

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Baden, PA, United States of America

Gary L Bailey