Speed control apparatus and method for railroad car retarders

Details Speed control apparatus and method for railroad car retarders Speed control apparatus and method for railroad car retarders

1979-04-23

1980-11-25

Eisenzopf, Reinhard J.

Railway switches and signals

Cab signal or train control

Speed-control systems

104 26A, B61K 712

Patent

active

042354030

ABSTRACT:
An acceleration servo control system for railroad car retarders in which a computed desired instantaneous deceleration signal and a measured actual deceleration signal are compared and any resulting error signal is fed back through the servo network to adjust retarder braking pressures to achieve and/or hold the desired deceleration rate which will allow the cut of cars to leave the retarder at a selected speed. The desired instantaneous deceleration is computed using an algorithm incorporating actual measured speed, the selected exit speed, the number of axles in the retarder, and the remaining distance-to-go for all axles of the cut over which retarder braking will be effective, and based on the principle of braking each axle-wheel unit throughout the entire retarder length.

REFERENCES:
patent: 3110461 (1963-11-01), Brockman
patent: 3515867 (1970-06-01), Seay
patent: 3745334 (1973-07-01), Wong et al.
patent: 3844514 (1974-10-01), DiPaola et al.
patent: 3946973 (1976-03-01), Budway et al.

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