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US 5,636,796 AGranted
Fluid injection nozzle
AssigneeNippondenso Co., Ltd.
InventorYoshitomo Oguma
Life of this patent
Estimating the term…
Abstract
A fluid injection nozzle which can atomize a fluid and spray it in a plurality of directions and can be easily manufactured. A first orifice plate is made of metal and has a slit-shaped first orifice provided in a central portion thereof. A second orifice plate is also made of metal and is provided with two second orifices which become narrower with progress in the downstream direction of the fuel flow. The upstream and downstream side openings of the second orifice and the upstream and downstream side openings of the second orifice are eccentric. As a result, fuel passing through the second orifices is guided in the directions of the eccentricity and a fluid injection nozzle having ideal injection directions can be obtained.
Claims16
A fluid injection nozzle for injecting fluid comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on a downstream side of said first plate and provided with a plurality of second holes which communicate with a part of said first hole, each of said second holes having upstream and downstream side apertures,
- wherein said upstream side aperture and said downstream side aperture of at least one of said second holes are eccentric, and
- at least one of said plurality of second holes is defined by inner wall surfaces which face each other and extend along imaginary surfaces which intersect in a direction of injection of said fluid.
3 more elements
A fluid injection nozzle for injecting fluid, said nozzle comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on a downstream side of said first plate and provided with a plurality of second holes which communicate with a part of said first hole, each of said second holes having upstream and downstream side apertures, wherein said upstream side aperture and said downstream side aperture of at least one of said second holes are eccentric;
- wherein said upstream and downstream side apertures are formed in a polygonal shape and said second holes are defined by a plurality of planar inner walls extending from said upstream side aperture to said downstream side aperture.
2 more elements
A fluid injection nozzle for injecting fluid, said nozzle comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on a downstream side of said first plate and provided with a plurality of second holes which communicate with a part of said first hole, each of said second holes having upstream and downstream side apertures, wherein said upstream side aperture and said downstream side aperture of at least one of said second holes are eccentric;
- wherein each of said plurality of second holes is defined by a surface having a first inclination relative to said upstream and downstream side apertures at a first side of said hole proximate a center of said second plate, and a second inclination relative to said apertures greater than said first inclination at a side of said hole opposite said first side.
2 more elements
A fluid injection nozzle for injecting fluid comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on the downstream side of said first plate and provided with a plurality of second polygonal holes which communicate with a part of said first hole and whose cross-sectional areas are gradually reduced toward the downstream side,
- wherein a pair of adjacent ones of a plurality of inner walls defining said second polygonal holes spread in a predetermined direction of fluid injection, and
- an imaginary line connecting a center of an upstream side aperture of at least one of said second holes and a center of a downstream side aperture of said at least one of said second holes is inclined with respect to a thickness of said second plate.
3 more elements
A fluid injection nozzle for injecting fluid comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on the downstream side of said first plate and provided with a plurality of second polygonal holes which communicate with a part of said first hole and whose cross-sectional areas are gradually reduced toward the downstream side, each of said second holes having upstream and downstream side apertures,
- wherein a pair of adjacent ones of a plurality of sides constituting a polygon which specifies the upstream and downstream side apertures of said second holes open in the predetermined direction of fluid injection, and
- an imaginary line connecting a center of said upstream side aperture of at least one of said second polygonal holes and a center of said downstream side aperture of said at least one of said second polygonal holes is inclined with respect to a thickness of said second plate.
3 more elements
A fluid injection nozzle for injecting fluid comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on a downstream side of said first plate and provided with a plurality of second holes which communicate with a part of said first hole, each of said second holes having upstream and downstream side apertures;
- wherein said upstream side aperture and said downstream side aperture of at least one of said second holes are eccentric, and
- at least one of said upstream side aperture and said downstream side aperture of at least one of said second holes has a polygonal shape.
3 more elements
A fluid injection nozzle for injecting fluid comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on a downstream side of said first plate and provided with a plurality of second holes which communicate with a part of said first hole, each of said second holes having upstream and downstream side apertures;
- wherein said upstream side aperture and said downstream side aperture of at least one of said second holes are eccentric, and
- at least one of said second holes is defined by a plurality of planar inner walls.
3 more elements
A fluid injection nozzle for injecting fluid comprising:
- a needle body having an injection port at one end;
- a needle for opening and closing said injection port;
- and
- a plurality of orifice plates disposed at a downstream side of said injection port, said plurality of orifice plates including a first plate having a first slit hole through which a fluid passes and a second plate overlaid on a downstream side of said first plate and provided with a plurality of second holes which communicate with a part of said first hole, each of said second holes having upstream and downstream side apertures,
- wherein at least one of said second holes being defined by a plurality of planar inner walls, an angle of inclination of one of said plurality of planar inner walls with respect to a thickness of said second plate being different from an angle of inclination of another of said plurality of planar inner walls with respect to said thickness.
2 more elements
Dependencies are inferred from the claim text.