Method for activating a two-stage switching valve

Details Method for activating a two-stage switching valve Method for activating a two-stage switching valve

2011-08-09

2011-08-09

King, Bradley T (Department: 3657)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C303S156000, C303S199000

Reexamination Certificate

active

07992947

ABSTRACT:
A method for activating a two-stage switching valve including a first stage which has a small flow cross-section and a second stage which has a larger flow cross section, the switching valve being situated between a main brake cylinder and a hydraulic pump in a hydraulic brake system. The pressure equalization knock on opening the switching valve is substantially reduced by activating the switching valve in a first control phase via a control signal having a low amplitude, due to which only the first stage of the valve is first opened, and by activating the valve in a second phase via a control signal having a higher amplitude.

REFERENCES:
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