Valves and valve actuation – Permanent or constantly energized magnet actuator
Reexamination Certificate
2006-07-25
2006-07-25
Look, Edward K. (Department: 3751)
Valves and valve actuation
Permanent or constantly energized magnet actuator
C335S302000
Reexamination Certificate
active
07080818
ABSTRACT:
A pressure regulating valve, for regulating the pressure in a common rail, having a pistonlike valve member guided axially displaceably in a bore, which valve member acts on a closing element which can be pressed against a valve seat, and the valve member forms an armature of an electromagnet that can be supplied with current. The armature of the electromagnet is embodied as a permanent magnet, or the electromagnet surrounding the armature is connected to a permanent magnet likewise acting on the armature, so that even in the state without current, a magnetic force acts on the valve member. In this way, even in the event of a failure of the electromagnetic regulation, a pressure is generated at the valve outlet. In the state when current is supplied, the closing force of the valve can be regulated over the entire pressure range.
REFERENCES:
patent: 5188336 (1993-02-01), Graner et al.
patent: 6386505 (2002-05-01), Schob
Braeuer Christian
Holl Stefan
Fristoe Jr. John K.
Greigg Ronald E.
Look Edward K.
Robert & Bosch GmbH
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