Pressure regulating valve for common rail fuel injection...

Details Pressure regulating valve for common rail fuel injection... Pressure regulating valve for common rail fuel injection...

2007-05-15

2007-05-15

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C251S129150, C123S458000

Reexamination Certificate

active

10899086

ABSTRACT:
A pressure regulating valve for regulating the pressure in a common rail with a pistonlike valve member which is guided axially displaceably in a bore and acts in the closing direction on a closing element and presses it against a valve seat; the valve member forms an armature of an electromagnet to which electrical current can be supplied. The opening cross section of the inlet of the pressure regulating valve is designed such that the pressure regulating valve cannot be opened until beyond a predetermined minimum fuel pressure greater than or equal two 250 bar. In this way, even if the electromagnetic closing force fails, a minimum pressure at the valve outlet is generated and thus makes an injection event possible.

REFERENCES:
patent: 3791408 (1974-02-01), Saitou et al.
patent: 5456233 (1995-10-01), Felhofer
patent: 5462253 (1995-10-01), Asthana et al.
patent: 6349703 (2002-02-01), Rapp
patent: 6408824 (2002-06-01), Pacucci et al.
patent: 1 219 828 (2002-07-01), None

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