Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1976-02-04
1978-01-31
Kunin, Stephen G.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
180 82R, 188181C, 303 96, 361238, 324166, 340 53, B60T 802, G01P 358
Patent
active
040712826
ABSTRACT:
The inventive system comprises a magnetic pulse generator mounted on each axle of a railroad car. The outputs from the resulting pulse generators are fed to a detector which compares the speeds of the axles. When wheel slip indicated by a pulse count difference between axles is encountered, the detector operates solenoid-operated dump valves to increase brake pressure on both axles of the slipping axle truck. When axle speed recovers to a non-slipping condition, the dump valves are reset and brake pressure is reduced. The detector circuitry is also able to detect wheel slide thus permitting corrective action. In addition to the above, the system includes provision to prevent synchronous sliding of all axles by sensing the rate of change of count.
REFERENCES:
patent: 3482887 (1969-12-01), Sheppard
patent: 3502904 (1970-03-01), Bordonaro
patent: 3586385 (1971-06-01), Florus et al.
patent: 3608978 (1971-09-01), Neisch
patent: 3620577 (1971-11-01), Neisch et al.
patent: 3639753 (1972-02-01), Reich
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patent: 3714509 (1973-06-01), Coleman et al.
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patent: 3891046 (1975-06-01), Oicles
patent: 3909071 (1975-09-01), Klatt
patent: 3948570 (1976-04-01), Fukumori et al.
K. D. E. Crawford, "Electronic Control of Spin or Slide," Railway Gazette International, Apr., 1971, pp. 140-142.
Callahan Bernard E.
Christianson Edward A.
Kunin Stephen G.
Lidd Francis J.
Vapor Corporation
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