Brake control system for combining electric and fluid pressure b

Details Brake control system for combining electric and fluid pressure b Brake control system for combining electric and fluid pressure b

1986-10-16

1988-05-17

Reger, Duane A.

Fluid-pressure and analogous brake systems

Multiple control

Fluid and electric

303 3, B60T 1366

Patent

active

047446072

ABSTRACT:
A railway car braking system employing a pneumatic brake to supplement the primary electric brake is provided with a feedback signal corresponding to the effectiveness of the electric brake. This feedback signal is compared with the brake command signal to derive a deficiency signal, in accordance with which the pneumatic brake is applied. A detector senses a change in the deficiency signal in decreasing sense for applying a correction factor to the deficiency signal, thereby compensating for hysteresis typically associated with the various valves in the pneumatic brake system, in order to obtain consistent pneumatic braking for a given deficiency signal during both an increase and a decrease of the pneumtic braking level.

REFERENCES:
patent: 4598953 (1986-07-01), Wood et al.

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