WO2011022821A1 - Soupape d’injection pour moteur à combustion interne - Google Patents

Soupape d’injection pour moteur à combustion interne Download PDF

Info

Publication number
WO2011022821A1
WO2011022821A1 PCT/CA2010/001306 CA2010001306W WO2011022821A1 WO 2011022821 A1 WO2011022821 A1 WO 2011022821A1 CA 2010001306 W CA2010001306 W CA 2010001306W WO 2011022821 A1 WO2011022821 A1 WO 2011022821A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
tapered surface
valve seat
atomizing
needle
Prior art date
Application number
PCT/CA2010/001306
Other languages
English (en)
Inventor
Lewis Johnson
Original Assignee
Lewis Johnson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lewis Johnson filed Critical Lewis Johnson
Publication of WO2011022821A1 publication Critical patent/WO2011022821A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/06—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being furnished at seated ends with pintle or plug shaped extensions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • Direct-injection spark-ignition engines have been developed to improve the fuel efficiency of vehicles.
  • the distribution of the fuel in the engine's cylinders is directly related to the performance of the engine, and is controlled by the injection nozzle.
  • U.S. patent no. 7,418,940 (Yi et al.) entitled “Fuel injector spray pattern for direct injection spark ignition engines” describes an injection nozzle to achieve a desired fuel distribution.
  • an injection valve for injecting fuel into a working chamber of an internal combustion engine comprising a valve seat on the working chamber, and a valve needle movable relative to the valve seat between a closed position and an open position.
  • the valve seat has an inner tapered surface and the valve needle has an outer tapered surface, such that, when in the open position, the inner tapered surface of the valve seat and the outer tapered surface of the valve needle define a flow passage that decreases in diameter toward the working chamber.
  • the valve needle terminates at an atomizing surface, the atomizing surface being at an angle of between 45 and 135 degrees relative to the outer tapered surface, the flow passage directing the fuel onto the atomizing surface.
  • the internal tapered surface and the outer tapered surface may taper at different angles, such that the flow area of the flow passage decreases.
  • the outer tapered surface of the valve needle may be stepped to a smaller diameter between the valve seat and the atomizing surface.
  • the atomizing surface may be contoured.
  • the needle may be withdrawn away from the valve seat to move to the open position.
  • the atomizing surface may be at an angle of between 60 and 120 degrees relative to the outer tapered surface.
  • FIG. l is a front elevation view of an injection valve in the closed position.
  • FIG. 2 is a front elevation view of an injection valve in the open position.
  • FIG. 3 is a front elevation view if an alternative injection valve in the closed position.
  • FIG. 4 is a front elevation view of an alternative injection valve in the open position.
  • FIG. 5 is a front elevation view of an injection valve with a stop shoulder.
  • FIG. 6 and 7 are perspective views of valve needles with different atomizing surfaces.
  • an injection valve 10 for injecting fuel into a working chamber 16 of an internal combustion engine includes a valve seat 12 and a valve needle 14.
  • the valve needle 14 is movable relative to the valve seat 12, from a closed position to an open position based on the application of a predetermined pressure.
  • the valve needle 14 and the valve seat 12 seal the working chamber 16 against fuel.
  • the valve needle 14 in the open position, permits fuel to enter the working chamber 16 by being withdrawn away from the valve seat 12.
  • An alternative valve needle 14 is shown in FIG. 3 with a stepped portion 17, and is shown in the open position in FIG. 4.
  • the valve seat 12 has an inner tapered surface 18 that defines a needle-engaging surface 20.
  • the valve needle 14 has an outer tapered surface 22 that defines a seat-engaging surface 24.
  • the valve seat 12 and the valve needle 14 define a flow passage 26 that decreases in diameter toward the working chamber 16.
  • the internal tapered surface 20 and the outer tapered surface 24 taper at different angles which causes the flow area of the flow passage 26 to decrease.
  • the flow passage 26 is wide enough to allow a laminar flow of fuel to exit into the working chamber 16 under the pressures used in direct-injection spark-ignition engines.
  • the valve needle 14 Prior to injection, as pressure increases within the flow passage 26, the valve needle 14 is withdrawn from the valve seat 12.
  • stop shoulders 32 and 34 may be positioned at the back of the needle 14.
  • the decreasing width of the flow passage 26 and the decreasing diameter of the valve needle 14 result in a decreasing flow area, and therefore a higher pressure, as the flow of fuel approaches the working chamber 16.
  • this increase in pressure and decrease in width is not sufficient to cause the fuel to convert to a mist prior to striking the atomizing surface 28 discussed below, but still allows a laminar flow to be injected into the working chamber 16.
  • the valve needle 14 terminates at an atomizing surface 28.
  • the atomizing surface 28 has an angle of between 45 and 135 degress, or in some cases, between 60 and 120 degrees relative to the outer tapered surface 24 and the flow passage 26 directs the fuel onto the atomizing surface 28.
  • the outer tapered surface 24 of the valve needle 14 has a smaller diameter between the valve seat 12 and the atomizing surface 28.
  • atomizing surface 28 may take different forms, and may be contoured in various ways to obtain a desired distribution of fuel.
  • the atomizing surface 28 is at an angle relative to the flow of fuel from the flow passage 26, such that the fluid energy is used to convert the fuel into a mist.
  • the atomizing surface 28 is preferably rounded or otherwise contoured to direct the mist in different directions, depending on when the laminar fuel flow strikes.
  • valve needle 14 is movable relative to valve seat 12 based upon the application of predetermined pressures. As pressure increases within flow passage 26, pressure is applied to cause valve needle 14 is withdrawn from valve seat 12. In the open position, the injection valve 10 allows fuel to enter the working chamber 16. Fuel moves through flow passage 26 and is directed onto the atomizing surface 28. Fuel will initially be in the form of a laminar flow. The laminar flow will follow the surface of needle 14, or if a design as shown in FIG. 3 and 4 is used, the laminar flow of fuel may be suspended. Each will affect the ultimate flow pattern of fuel. When the fuel strikes the atomizing surface 28, the flow is disrupted and it is converted into a mist, which is then distributed throughout the working chamber 16 prior to being ignited. The atomizing surface 28 may also be designed to provide a specific type of distribution.
  • injection valve 10 prohibits fuel from entering working chamber 16.
  • the outer tapered surface 24 of valve needle 14 and the internal tapered surface 20 of the valve seat seal against each other to close the flow passages 26 and prevent fuel from entering the working chamber 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Cette invention concerne une soupape d’injection destinée à injecter du carburant dans une chambre de travail d’un moteur à combustion interne. Ladite soupape comprend un siège de soupape disposé sur la chambre de travail et un pointeau de soupape apte à se déplacer entre une position fermée et une position ouverte par rapport au siège de soupape. Le siège de soupape présente une surface interne tronconique et le pointeau de soupape présente une surface externe tronconique de telle sorte que, dans la position ouverte, la surface interne tronconique du siège de soupape et la surface externe tronconique du pointeau de soupape définissent un passage d’écoulement dont le diamètre se réduit progressivement vers la chambre de travail. Le pointeau de soupape se termine en une surface d’atomisation. La surface d’atomisation est à un angle de 45 à 135 degrés par rapport à la surface externe tronconique et le passage d’écoulement dirige le carburant sur la surface d’atomisation.
PCT/CA2010/001306 2009-08-31 2010-08-30 Soupape d’injection pour moteur à combustion interne WO2011022821A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23833009P 2009-08-31 2009-08-31
US61/238,330 2009-08-31

Publications (1)

Publication Number Publication Date
WO2011022821A1 true WO2011022821A1 (fr) 2011-03-03

Family

ID=43627113

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2010/001306 WO2011022821A1 (fr) 2009-08-31 2010-08-30 Soupape d’injection pour moteur à combustion interne

Country Status (1)

Country Link
WO (1) WO2011022821A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2707592A4 (fr) * 2011-05-13 2015-06-17 Andrew E Meyer Injecteur de carburant
US9366208B2 (en) 2009-03-24 2016-06-14 Andrew E Meyer Electronically controlled fuel injector with fuel flow rate substantially independent of fuel inlet pressure
EP3165759A1 (fr) * 2015-11-09 2017-05-10 C.R.F. Società Consortile Per Azioni Procédé d'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, atomiseur d'un electro-injecteur de carburant pour mettre un tel procédé d'injection et procédé de production dudit atomiseur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141765A (ja) * 1983-02-01 1984-08-14 Toyota Motor Corp 火花点火式燃料噴射式内燃機関の燃料噴射装置
US5465907A (en) * 1993-02-10 1995-11-14 Robert Bosch Gmbh Fuel injection nozzle for internal combustion engines
DE19820513A1 (de) * 1998-05-08 1999-11-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzdüse für eine Brennkraftmaschine
DE10328331A1 (de) * 2002-06-25 2004-01-29 Denso Corp., Kariya Kraftstoffeinspritzdüse
US20050284968A1 (en) * 2004-06-23 2005-12-29 Toyota Jidosha Kabushiki Kaisha Fuel injection valve for internal combustion engine
US20070040053A1 (en) * 2005-08-18 2007-02-22 Denso Corporation Fuel injection apparatus for internal combustion engine
US20090139487A1 (en) * 2007-11-29 2009-06-04 Dingle Philip J G Dual mode combustion apparatus and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141765A (ja) * 1983-02-01 1984-08-14 Toyota Motor Corp 火花点火式燃料噴射式内燃機関の燃料噴射装置
US5465907A (en) * 1993-02-10 1995-11-14 Robert Bosch Gmbh Fuel injection nozzle for internal combustion engines
DE19820513A1 (de) * 1998-05-08 1999-11-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzdüse für eine Brennkraftmaschine
DE10328331A1 (de) * 2002-06-25 2004-01-29 Denso Corp., Kariya Kraftstoffeinspritzdüse
US20050284968A1 (en) * 2004-06-23 2005-12-29 Toyota Jidosha Kabushiki Kaisha Fuel injection valve for internal combustion engine
US20070040053A1 (en) * 2005-08-18 2007-02-22 Denso Corporation Fuel injection apparatus for internal combustion engine
US20090139487A1 (en) * 2007-11-29 2009-06-04 Dingle Philip J G Dual mode combustion apparatus and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9366208B2 (en) 2009-03-24 2016-06-14 Andrew E Meyer Electronically controlled fuel injector with fuel flow rate substantially independent of fuel inlet pressure
EP2707592A4 (fr) * 2011-05-13 2015-06-17 Andrew E Meyer Injecteur de carburant
EP3165759A1 (fr) * 2015-11-09 2017-05-10 C.R.F. Società Consortile Per Azioni Procédé d'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, atomiseur d'un electro-injecteur de carburant pour mettre un tel procédé d'injection et procédé de production dudit atomiseur

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