Fluid-pressure and analogous brake systems – Multiple control – Fluid and electric
Reexamination Certificate
1995-11-09
2001-09-11
Oberleitner, Robert (Department: 3613)
Fluid-pressure and analogous brake systems
Multiple control
Fluid and electric
C303S007000
Reexamination Certificate
active
06286913
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a limp-in feature for controlling the air brakes for railway vehicles and, more particularly, to a limp-in control arrangement for permitting the application and release of the brakes on a disabled railway vehicle when the electro-pneumatic integrated control system experiences an electrical malfunction so that the disabled railway vehicle can be moved to a repair shop.
BACKGROUND OF THE INVENTION
In certain electro-pneumatic brake control systems, the brake pipe control is dependent upon the functional operation of the electronics. If the electronics in existing electro-pneumatic integration control system malfunction, there is currently no electrical way in the controlling cab to operate the train brakes. The present electro-pneumatic integrated control system is provided with a pneumatic backup arrangement to generate brake cylinder pressure when the brake pipe is varied. It would be very beneficial to provide an alternate electrical means for controlling brake pipe pressure when the computer of the electro-pneumatic integrated control system malfunctions. Such an arrangement could be used as a limp-in control to permit the trainman or operator to manually switch to this mode and move the train to a repair shop or the like.
OBJECTS AND/OR SUMMARY OF THE INVENTION
Accordingly, it is an object of this invention to provide a unique limp-in control feature for an electro-pneumatic integrated control system for railway vehicles.
A further object of this invention is to provide a new arrangement of releasing the brakes on railway vehicles during an electronic failure.
Another object of this invention is to provide a novel electrical apparatus for controlling the brakes on a disabled railway vehicle.
Yet a further object of this invention is to provide a new and improved limp-in feature for allowing a railway vehicle to be moved by applying/releasing the brakes of a train.
Yet another object of this invention is to provide a unique arrangement for electrically controlling the pneumatic-operated brakes on a railway train which is equipped with an electro-pneumatic integrated control system.
Still a further object of this invention is to provide a novel and unique limp-in control arrangement for an electro-pneumatic integrated control system for railway vehicles comprising, an exhaust magnet valve and a supply magnet valve in which the electrical conditions control the brakes on the railway vehicle, means for sensing the operational condition of said electro-pneumatic integrated control system, means for enabling a limp-in control function when said electro-pneumatic integrated control system is experiencing a malfunction, means for initiating a limp-in operation by releasing and reapplying the brakes so that the railway vehicle may be moved to repair said malfunction.
Still another object of this invention is to provide a limp-in control arrangement which is economical in cost, unique in design, efficient in operation, dependable in service, durable in use, and simple in construction.
DESCRIPTION OF THE DRAWINGS
The above objects and other attendant features and advantages will be more readily appreciated as the present invention becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings, wherein:
FIG. 1
is a partial diagrammatic illustration of a manual limp-in control arrangement for an electro-pneumatic integrated circuit brake control system for railway vehicles in accordance with the present invention.
FIG. 2
is a truth table of the positions of a pair of cam-operated switches when the brake handle is moved to its application, lap and released positions.
FIG. 3
is a truth table of the electrical conditions of the supply and exhaust electromagnetic valves when the brake handle is moved to its application, release and lap positions.
REFERENCES:
patent: 4598953 (1986-07-01), Wood et al.
patent: 4904027 (1990-02-01), Skantar et al.
patent: 4978179 (1990-12-01), Balukin
patent: 5222788 (1993-06-01), Dimsa et al.
Balukin Richard F.
Dimsa Robert D.
Jamieson Paul E.
Mazur Richard J.
James Ray & Associate
Oberleitner Robert
Rodriguez Pamela J.
Westinghouse Air Brake Company
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