Electrically controlled brake for vehicles, especially rail vehi

Details Electrically controlled brake for vehicles, especially rail vehi Electrically controlled brake for vehicles, especially rail vehi

1985-09-06

1987-07-28

Reger, Duane A.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

303 23R, B60T 818

Patent

active

046828230

ABSTRACT:
The electrically controllable brake, preferably pressure actuated brake for vehicles has a control device (13) which, controlled by a brake demand signal, monitors the release of an appropriate braking power or a corresponding braking pressure. For the vehicle load dependent limitation of the braking force or the braking pressure, a vehicle load signal, present as electrical signal value, is led to a modem (38 to 45), which converts the electrical signal value into a mechanical signal value (prestress of the control spring 36). The mechanical signal value directly controls a limiting device (pressure limiting valve 11) which serves for the vehicle load dependent limitation of the braking power or the braking pressure to be delivered. During a failure of the electrical vehicle load signal, of the electric components and/or of the power supply, the modem maintains approximately constant the momentary mechanical signal value, so that the braking power or braking pressure to be delivered remains limited in dependence on the vehicle load, even during a failure of the vehicle load signal. This prevents overbraking of the vehicle during the stated and other emergencies.

REFERENCES:
patent: 4223955 (1980-09-01), Reinecke
patent: 4534599 (1985-08-01), Wright et al.
BBC Publication PA20796, 6/19/1952.

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