Fuel injection valve for internal combustion engine

Details Fuel injection valve for internal combustion engine Fuel injection valve for internal combustion engine

1996-03-01

1999-03-02

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

23953312, 239584, F02M 5900

Patent

active

058759735

ABSTRACT:
A fuel injection valve for internal combustion engines, with a valve member which is guided axially displaceably in a bore of a valve body and which has, at its end on the combustion space side, a conical valve sealing face, the valve sealing face cooperates with a conical valve seat face at that end of the bore located on the combustion space side, a blind hole or a conical region adjoining said valve seat face on the combustion space side, with a pressure space opening onto the valve seat and located between the valve member shank and the wall of the bore, and with at least one injection duct leading off from an inner wall of the injection valve, said inner wall being located downstream of the valve seat. For forming the injection jet, the entry regions of the injection duct are rounded, an upper entry region which faces the pressure space having a large radius (RA) and a lower entry region which faces away from the pressure space having a smaller radius (RB). Thus, the size of the radius (RA) is 0.75 to 1.5 times and that of the radius (RB) 0.2 to 1.0 times the diameter (D) of the injection duct.

REFERENCES:
patent: 4069978 (1978-01-01), ElMoussa
patent: 4177948 (1979-12-01), Schaffitz et al.
patent: 4275844 (1981-06-01), Grgurich et al.
patent: 4578164 (1986-03-01), Matsui et al.
patent: 4819871 (1989-04-01), Kronberger et al.
patent: 4917307 (1990-04-01), Baxter et al.
patent: 5026462 (1991-06-01), Butterfield et al.
patent: 5467924 (1995-11-01), Buecher et al.

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