Electropneumatic control valve with a back-up valve

Details Electropneumatic control valve with a back-up valve Electropneumatic control valve with a back-up valve

2006-05-30

2006-05-30

Schwartz, Chris (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C303S007000

Reexamination Certificate

active

07052095

ABSTRACT:
Electropneumatic control valve for a pneumatic brake system of a vehicle, having a divided valve housing consisting of a lower relay valve housing and an upper pilot valve housing which enclose a control chamber in which an axially adjustable control piston is guided. The piston can be acted upon by way of a pilot valve arrangement accommodated in the pilot valve housing in order to switch the compressed-air flow between at least one brake line connection arranged on the relay valve housing, a supply pressure connection and as a bleeder connection by way of an interior valve seat arrangement. A control connection of a back-up valve of the pilot valve arrangement is also arranged on the relay valve housing, and by way of a valve-internal pressure medium duct is connected with the back-up magnetic valve accommodated in the pilot valve housing. Internal pressure medium ducts are arranged and sealed in a manner that allows the pilot valve housing to be produced without machining.

REFERENCES:
patent: 6206481 (2001-03-01), Kaisers et al.
patent: 3931761 (1991-04-01), None
patent: 19605562 (1997-08-01), None
patent: 199 02 225 A 1 (1999-01-01), None
patent: 199918070 (1999-12-01), None

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