Fluid-pressure and analogous brake systems – Load control
Patent
1996-05-03
1998-10-20
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Load control
303 3, 303 15, 303198, B60G 2500
Patent
active
058236384
ABSTRACT:
A brake system is provided for a multi-platform railroad car in which a single microprocessor is employed to control the car brakes. In one embodiment, a single electro-pneumatic control unit provides a common brake pressure to the brakes of each truck in accordance with the truck design net brake ratio and load weight of whichever truck requires the lowest brake pressure. In a second embodiment of the invention, the brakes on separate truck sets are provided with different common brake pressures by employing separate electro-pneumatic control units for each truck set under control of the microprocessor. In such an arrangement, the different common brake pressure on one truck set can be increased to make-up at least a portion of a brake deficit on another truck set due to light car loads associated with the other truck set in order to meet or at least closely approach the commanded net braking ratio for the entire multi-platform car.
REFERENCES:
patent: 4804234 (1989-02-01), Gee et al.
patent: 5303986 (1994-04-01), VanDeMotter et al.
patent: 5475596 (1995-12-01), Henry et al.
Paul John E.
Sich Gary M.
Falce Gary J.
Graham Matthew C.
Westinghouse Air Brake Company
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