GB2225382A - I.C engine fuel injector outlets - Google Patents

I.C engine fuel injector outlets Download PDF

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Publication number
GB2225382A
GB2225382A GB8924269A GB8924269A GB2225382A GB 2225382 A GB2225382 A GB 2225382A GB 8924269 A GB8924269 A GB 8924269A GB 8924269 A GB8924269 A GB 8924269A GB 2225382 A GB2225382 A GB 2225382A
Authority
GB
United Kingdom
Prior art keywords
divider
fact
apertures
valve according
injection hole
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB8924269A
Other versions
GB8924269D0 (en
Inventor
Francesco Morini
Massimo Lolli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weber SRL
Original Assignee
Weber SRL
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 Weber SRL filed Critical Weber SRL
Publication of GB8924269D0 publication Critical patent/GB8924269D0/en
Publication of GB2225382A publication Critical patent/GB2225382A/en
Withdrawn legal-status Critical Current

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
    • F02M61/16—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
    • F02M61/184—Discharge orifices having non circular sections
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • F02M61/1853—Orifice plates

Description

1 1 A t p 2225382 - 1 A FUEL METERING AND ATOMISATION VALVE FOR AN
INTERNAL COMBUSTION ENGINE FUEL INJECTION SYSTEMi WITH A FLOW DIVIDER OF IMPROVED TYPE The present invention relates to a valve for metering and atomisation of the fuel in an internal combustion engine fuel injection system, with a flow divider of improved type.
As is known,_ valves of the type indicated above comprise a nozzle having an injection hole, and downstream from this, a flow divider adapted to divide the fuel jet. It is known, moreover, that the greater the atomisation of the fuel the better is the mixture between the air and fuel and therefore the better the combustion of this mixture.
Flow dividers installed in current valves have for this purpose two inclined apertures which. however, separate the fuel jet into two relatively compact streams and therefore the division of the fuel Is poor. Moreover. the apertures in the divider are of small diameter and therefore constitute a restriction to the flow of fuel the flow rate of which is, as is known, defined by the diameter of the injection hole. Finally, in current f low dividers, it is necessary to f orm ref erence points so that during assembly orientation of the position of J c the two holes of the divider with respect to the induction manifold of the engine can be achieved The object of the present invention is that of providing a valve of the type above indicated which will be free from the above- mentioned disadvantages and which therefore will provide a flow divider which allows a more effective atomisation of the fuel and which can be assembled simply and rapidly.
According to the present invention there is provided a valve for metering and atomisation of the fuel in an internal combustion engine fuel injection system, of the type comprising a nozzle (3) having an injection hole, characterised by the fact that downstream from the said injection hole there is installed a divider adapted to divide the fuel jet, for which purpose it includes four apertures the respective longitudinal axes of which are inclined with respect to the longitudinal axis of the said divider.
For a better understanding of the present invention a preferred embodiment will now be described purely by way of non- limitative example, with reference to the attached drawings, in which:
Figure 1 is a section through a valve formed according to the principles of the present invention; 1 1 and Figure 2 is a view from below looking upwards of a component of the valve of Figure 1.
With reference to Figure 1, the reference numeral 1 generally indicates a fuel metering and atomisation valve for an internal combustion engine fuel injection system 2 (illustrated partially because It is of known type) the valve 1 comprises a substantially tubular nozzle 3 having a cylindrical side wall 4 and a lower wall 5 in which is formed an injection hole 6. The device 2 includes a body 7 which at its lower end supports a nozzle 3 which has an axial bore along which a shutter member 8 is axially slidable. A lower edge 9 is of the body 7 is, in use, folded inwardly to engage over an annular flange 10 extending from the side wall 4 of the nozzle 3.
It is known that preferably the fuel flows through an axial passage formed in the shutter member 8 as far as its faceted portion 11, from which it flows through radial holes 12 into the interior of a chamber 13 defined within the nozzle 3. It is likewise known that the shutter member 8 is translated upwardly. against the action of spring means, by the attraction which is exerted by a ferromagnetic core excited by an appropriate electric coil on an armature fixed to the 1 shutter member 8. This includes a substantially tapered lower end 14 which in use acts on the interior of the injection hole for partial or total obstruction thereof.
With reference to Figures 1 and 2, according to the present invention the valve is provided with a divider 15 constituted by a cup-shaped cylindrical body having a lower wall 16 and a cylindrical side wall 17. The divider 15, in use, is fitted over the nozzle 3 and in particular coaxially receives a lower portion of the nozzle 3. The inner face of the wall 16 of the divider 15 is in contact with the outer face of the wall 5 of the nozzle 3. In this wall 16 of the divider 15 there are formed four substantially cylindrical apertures 18.
The apertures 18 have respective longitudinal axes inclined with respect to that of the divider 15 and in particular in section are informally distributed with respect to the longitudinal axis of the divider 15. The apertures 18 have respective inlet openings (formed on the inner face of the wall 16) which open in to one another and in particular present a common zone, exactly in correspondence with outlet opening of the injection hole 6. The outlet openings of the apertures 18 are in the side wall of a substantially conical projection 21 extending coaxially from the outer face of the wall 16.
1 1 1 The divider 15 can be made in metal or in moulded plastics material. In a metal divider 15 the apertures 18 can be made by punching, by electro- erosion or by laser technology.
Around the nozzle 3, between an upper washer 22 fitted on the side wall 4 and a lower washer 23 which contacts the upper edge of the side wall 17 of the divider 15, there is formed a seat for an annular seal 24.
In use, the jet of fuel which is ejected from the injection hole 6 is separated into four parts by the divider 15. Moreover, it is to be noted that because of the shape of the four apertures 18 the central part of the wall 16 which separates them is exactly in correspondence with the openings of the apertures 18. This eliminates the phenomenon of bounce of the central region of the fuel jet as happens in current dividers.
From what has been explained above the advantages consequent on the present invention are apparent.
In particular, the valve is provided with a divider in which there are formed four apertures and therefore which is adapted to cause a more effective division and thus atomisation of the fuel jet. This contributes to an improvement in the degree of mixing of the fuel with 1 the air and therefore improves the combustion of the mixture. Moreover, the apertures 18 have a great overall width and therefore they do not constitute a restriction limiting the rate of flow of the fuel. It is to be noted that by forming the apertures 18 in an uniformly distributed manner it is no longer necessary to form reference points for orientation of these with respect to the fuel induction manifold of the engine. This considerably facilitates the assembly of the device 2 and its mounting for which the single reference point is constituted by an electrical supply connector for the coil. Further, it is to be indicated that the divider 15 is of simple construction and therefore of low production costs.
Finally, it is clear that the valve 1 described and illustrated here can have modifications and variations introduced thereto without by this departing from the protective ambit of the present invention.
1 1

Claims (11)

1. A valve for metering and atomisation of the fuel in an internal combustion engine fuel injection device of the type comprising a nozzle in which is formed an injection hole, characterised by the fact that downstream from the said injection hole there is installed a divider adapted to divide the fuel jet and having four apertures the respective longitudinal.axes of which are inclined with respect to the longitudinal axis of the said divider
2. A valve according to Claim 1, characterised by the fact that the inlet openings of the said apertures open into one another and lie on an internal face of the said divider facing the said injection hole
3. A valve according to Claim 2. characterised by the fact that the inlet openings of the said apertures have a common region thereof in correspondence with the outlet opening of the said injection hole
4. A valve according to Claim 3, characterised by the fact that the said apertures are uniformly distributed with respect to the longitudinal axis of the said divider h 1 c
5. A valve according to Claim 4, characterised by the fact that the said apertures are cylindrical.
6. A valve according to any one of the preceding claims, characterised by the fact that the said nozzle has a tubular form and comprises a cylindrical side wall and a lower wall in which the said injection hole is formed; the said divider having a cup-shape cylindrical body adapted coaxially.to house the lower portion of the said nozzle
7. A valve according to Claim 6, characterised by the fact that the said divider has a cylindrical side wall and a lower wall in which the said apertures are formed, and the internal face of which is substantially in contact with the outer face of the said lower wall of the said nozzle
8. A valve according to Claim 7. characterised by the fact that the outlet openings of the said apertures lie on a side wall of a substantially conical projection extending coaxially from the outer face of the said lower wall of the said divider
9. A valve according to any preceding claim, characterised by the fact that the said divider is made of metal and the said apertures are made by A 4 punching, electro-erosion or laser technology.
10. A valve according to any of claims from 1 to Bp characterised by the fact that the said divider made of moulded plastics material.
is
11. A valve for metering and atomisation of the fuel for an internal combustion engine fuel injection device, substantially as described and illustrated with reference to the attached drawings.
is 1 Published 1990 atThe Patent 0Mce, State House,88171 Mgh Holborn, LondonWC1R 4TP. Further copies maybe obtainedfrom The Patent OMCC.
GB8924269A 1988-10-28 1989-10-27 I.C engine fuel injector outlets Withdrawn GB2225382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8853493U IT214898Z2 (en) 1988-10-28 1988-10-28 FEEDING DEVICE OF A MO VALVE FOR DOSING AND INTERNAL COMBUSTION DUST WITH RETURNING THE FUEL INTO A PERFECTED DIVIDER

Publications (2)

Publication Number Publication Date
GB8924269D0 GB8924269D0 (en) 1989-12-13
GB2225382A true GB2225382A (en) 1990-05-30

Family

ID=11283183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8924269A Withdrawn GB2225382A (en) 1988-10-28 1989-10-27 I.C engine fuel injector outlets

Country Status (4)

Country Link
DE (1) DE3935697A1 (en)
FR (1) FR2638493A1 (en)
GB (1) GB2225382A (en)
IT (1) IT214898Z2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556034A (en) * 1993-12-06 1996-09-17 Honda Giken Kogyo Kabushiki Kaisha Fuel injection valve
US5862996A (en) * 1997-01-10 1999-01-26 The Procter & Gamble Company Laminar flow nozzle
EP1724463A1 (en) * 2004-03-09 2006-11-22 Keihin Corporation Electromagnetic fuel injection valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB163799A (en) * 1920-02-24 1921-05-24 Robert Pile Doxford Improvements in or relating to fuel-spraying nozzles for internal-combustion engines
GB2144178A (en) * 1983-07-28 1985-02-27 Lucas Ind Plc I.C. engine fuel injector
US4771948A (en) * 1986-08-19 1988-09-20 Aisan Kogyo Kabushiki Kaisha Combination of a fuel injection valve and a nozzle
US4773374A (en) * 1985-10-03 1988-09-27 Nippondenso Co., Ltd. Fuel injection system for internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60182356A (en) * 1984-02-28 1985-09-17 Aisan Ind Co Ltd Solenoid-operated fuel injector
JPS6287665A (en) * 1985-10-14 1987-04-22 Mitsubishi Motors Corp Fuel injection nozzle for direct injection type diesel-engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB163799A (en) * 1920-02-24 1921-05-24 Robert Pile Doxford Improvements in or relating to fuel-spraying nozzles for internal-combustion engines
GB2144178A (en) * 1983-07-28 1985-02-27 Lucas Ind Plc I.C. engine fuel injector
US4773374A (en) * 1985-10-03 1988-09-27 Nippondenso Co., Ltd. Fuel injection system for internal combustion engine
US4771948A (en) * 1986-08-19 1988-09-20 Aisan Kogyo Kabushiki Kaisha Combination of a fuel injection valve and a nozzle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556034A (en) * 1993-12-06 1996-09-17 Honda Giken Kogyo Kabushiki Kaisha Fuel injection valve
US5862996A (en) * 1997-01-10 1999-01-26 The Procter & Gamble Company Laminar flow nozzle
EP1724463A1 (en) * 2004-03-09 2006-11-22 Keihin Corporation Electromagnetic fuel injection valve
EP1724463A4 (en) * 2004-03-09 2007-05-23 Keihin Corp Electromagnetic fuel injection valve
US7614604B2 (en) 2004-03-09 2009-11-10 Keihin Corporation Electromagnetic fuel injection valve

Also Published As

Publication number Publication date
FR2638493A1 (en) 1990-05-04
IT214898Z2 (en) 1990-07-04
IT8853493V0 (en) 1988-10-28
DE3935697A1 (en) 1990-05-03
GB8924269D0 (en) 1989-12-13

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)