Load controller brake force controller for pneumatic motor vehic

Details Load controller brake force controller for pneumatic motor vehic Load controller brake force controller for pneumatic motor vehic

1984-12-07

1987-05-19

Reger, Duane A.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

303 40, B60T 822

Patent

active

046662170

ABSTRACT:
The invention relates to a load-controlled brake force controller system for a pneumatically operated brake for tractor and/or trailer vehicles. A housing includes a load-controlled brake pressure controller for regulating the control pressure released by a brake valve as a function of the load sustained by the vehicle. A relay valve connected in series relationship with the brake pressure controller to cause compressed air to be introduced to the brake from a reservoir when the brake valve is activated. The relay valve being activated by a relay piston which is pressurized toward an open direction of the relay valve by a modulated pressure and toward a closed direction of the relay valve by the braking pressure in an outlet chamber which is connected to the brakes and which can be connected by the relay valve to the reservoir. A graduated piston for providing a graduated increase of the brake pressure beyond the value corresponding to the current control ratio up to the available supply pressure and being adapted to go into operation at a predetermined control pressure.

REFERENCES:
patent: 4324436 (1982-04-01), Reinecke
patent: 4418965 (1983-12-01), Reinecke

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