FUEL INJECTION NOZZLE HAVING A VARIABLE NOZZLE HOLE AREA

WIPO Patent Application WO/1996/041948

A1

A nozzle for injecting fuel into a internal combustion engine, more particularly to a fuel injection nozzle having a hole and a rotary valve at the leading end of a nozzle body to control the rotation angle of the valve so as to vary the nozzle hole area, wherein the surrounding wall defining the hole has a control surface, and the rotary valve has a surface for receiving the pressure of pressurized fuel at its upper end, a conical surface having an angle corresponding to the inclined angle of the conical surface of the hole on its outer circumference, and a plurality of fuel passages provided therein at certain intervals in a circumferential direction that are open to the pressure receiving surface at one end thereof, each fuel passage being made open to a position of the conical surface corresponding to the nozzle hole on the side of the hole. This allows the fuel injection pressure to generate between the rotary valve and the nozzle body a friction torque greater that a torque rotating the rotary valve so that the rotary valve can be fixed to any position only by the fuel injection pressure.

HASEGAWA TOSHIYUKI (JP)
NOZAKI SHINYA (JP)
MIYAMOTO TAKESHI (JP)
AMEMORI MASANORI (JP)
KOBAYASHI TAKASHI (JP)

PCT/JP1996/001536

December 27, 1996

June 06, 1996

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ZEXEL CORP (JP)
HASEGAWA TOSHIYUKI (JP)
NOZAKI SHINYA (JP)
MIYAMOTO TAKESHI (JP)
AMEMORI MASANORI (JP)
KOBAYASHI TAKASHI (JP)

F02M61/04; F02M61/10; F02M61/18; (IPC1-7): F02M61/04; F02M61/10; F02M61/18

JPH0730366U	1995-06-06
JPS6022071A	1985-02-04
JPH0722064U	1995-04-21
JPH0476266A	1992-03-11
JPH02114768U	1990-09-13
JPS6487869A	1989-03-31
JPS61286577A	1986-12-17
JPS55117066A	1980-09-09

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