CN1699740A - Jet for spraying pressure fluid - Google Patents

Jet for spraying pressure fluid Download PDF

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Publication number
CN1699740A
CN1699740A CN 200510070247 CN200510070247A CN1699740A CN 1699740 A CN1699740 A CN 1699740A CN 200510070247 CN200510070247 CN 200510070247 CN 200510070247 A CN200510070247 A CN 200510070247A CN 1699740 A CN1699740 A CN 1699740A
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CN
China
Prior art keywords
spray
hole
nozzle body
fluid
valve seat
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Granted
Application number
CN 200510070247
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Chinese (zh)
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CN100396909C (en
Inventor
多田亮一
原田明典
吉丸清考
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Denso Corp
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Denso Corp
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Publication date
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Publication of CN1699740A publication Critical patent/CN1699740A/en
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Publication of CN100396909C publication Critical patent/CN100396909C/en
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    • 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
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • 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
    • F02M61/1826—Discharge orifices having different sizes
    • 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
    • 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
    • F02M61/1846—Dimensional characteristics of discharge orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Nozzles (AREA)

Abstract

An injector (10) for supplying pressure fluid such as fuel to the catalyst in a waste gas cleaning apparatus or an internal combustion engine is provided. The injector includes a nozzle body (30) with a valve seat (32) and a needle (50) having a sealing portion (53) which is arranged on the valve seat or lifted from the valve seat, a wall comprising a first sprayhole (41) and a second sprayhole (42) or a plurality of sprayholes (41, 42) pass through a nozzle body (30). The first sprayhole (41) with larger section is more adjacent to the valve seat (32) than the second sprayhole (42) with smaller section. The needle (50) moves relative to the nozzle body (30), the pressure fluid supplied to the injector is ejected brokenly through the sprayholes (41, 42). The fluid ejected from a plurality of sprayholes (41, 42) is atomized well.

Description

The sparger that is used for spraying pressure fluid
Technical field
The present invention relates to a kind of sparger that is used for spraying pressure fluid off and on such as fuel.
Background technique
In JP-A-9-126095, disclosed and be used for an example of the sparger of spraying pressure fluid off and on.In this sparger,, and open or close spray-hole by axial driving needle along the spray-hole of two alignment of axial formation of nozzle body.One of them spray-hole is formed on the downstream of valve seat, and another spray-hole is formed on more downstream side.There is following problems in the conventional injector that has two spray-holes.Fuel pressure in the nozzle body is along with its position is near more and high more apart from valve seat.The pressure of the fuel that ejects from the nearer spray-hole of distance valve seat is higher, and the fuel that ejects is atomized into fine particle well.On the other hand, the pressure of the fuel that ejects from distance valve seat spray-hole far away is lower, and therefore the fuel that ejects is difficult to be atomized into fine particle.
Summary of the invention
The present invention proposes in view of the above problems, and the object of the present invention is to provide a kind of improved fluid ejector that has a plurality of spray-holes, and wherein, the fluid that ejects from sparger is atomized into fine particle well.
Fluid ejector comprises cup-shaped nozzle body and pin, and wherein, described nozzle body has the internal surface as valve seat, and described pin has the outer surface that comprises hermetic unit.The wall that passes nozzle body forms at least two spray-holes that comprise first spray-hole and second spray-hole.First spray-hole is nearer apart from valve seat than second spray-hole, and promptly second spray-hole is positioned at the downstream of first spray-hole with respect to the fluid stream of sparger.The cross section of first spray-hole is greater than the cross section of second spray-hole.
Pressure fluid such as fuel are fed in the sparger.When the hermetic unit of pin placed on the valve seat of nozzle body, spray-hole was closed, and does not have spraying pressure fluid.With the hermetic unit of pin when the valve seat of nozzle body is upwards mentioned, spray-hole is opened, and from the spray-hole spraying pressure fluid.The pressure of the pressure fluid around first spray-hole is higher, and this is because first spray-hole is nearer apart from valve seat.Therefore, although the cross section of first spray-hole is relatively large, the fluid that sprays from first spray-hole can be atomized into fine particle fully.
On the other hand, the pressure of the pressure fluid around second spray-hole is lower, and this is because it is away from the valve seat setting.Yet the fluid passage of passing the second less spray-hole of cross section by compression increases the pressure of this fluid.Therefore, the fluid that ejects from second spray-hole is atomized into granule well.Thereby the fluid that ejects from two spray-holes is atomized on an equal basis well.
For the cross section that makes the spray-hole of winning cross section, along perpendicular to the width of first spray-hole of the axial orientation measurement of cup-shaped nozzle body width greater than second spray-hole greater than second spray-hole.Except the width that makes the spray-hole of winning was big, the height of first spray-hole also can be greater than the height of second spray-hole.Pressure flow between the internal surface of nozzle body and the outer surface of pin is not directed to the direct collision spray-hole.By this way, the fluid that ejects from spray-hole keeps stable, has avoided the influence that departs from the pressure flow.
By the better understanding to the preferred embodiment described below with reference to accompanying drawing, it is clearer that the other objects and features of the invention will become.
Description of drawings
Fig. 1 illustrates the viewgraph of cross-section of tip part that is formed with the sparger of spray-hole as first preferred embodiment of the present invention;
Fig. 2 is the viewgraph of cross-section that the total of sparger is shown;
Fig. 3 is the side view that illustrates from the tip part of sparger shown in Fig. 1 that direction III saw of Fig. 1;
Fig. 4 is the side view of tip part that the sparger of the second embodiment of the present invention is shown.
Embodiment
Below with reference to Fig. 1-3 first embodiment of the present invention is described.At first, the overall structure of sparger 10 will be described with reference to figure 2.Here the sparger that illustrates 10 as with fuel supply to being used for cleaning from the sparger of the reducing catalyst of the equipment of exhaust gas of internal combustion engines.The equipment that is used to clean the waste gas that contains reducing catalyst is installed in the exhaust steam passage of motor vehicle, and fuel is fed into reducing catalyst as reducing agent.Other materials except fuel can be used as the reducing agent that supplies to reducing catalyst.
Although sparger is used as the sparger of fuel supply to reducing catalyst in this embodiment, but, sparger of the present invention also can be used as pressure fuel is directly injected to the indoor fuel injector of combustion in IC engine, perhaps can be used as the fuel injector in the chamber of the premixed air that supplies fuel in the internal-combustion engine and fuel.
As shown in Figure 2, sparger 10 comprises cylindrical housings 11, and this cylindrical housings 11 is by first magnetic part 12, second magnetic part 14 and place the nonmagnetic portion 13 between these two magnetic parts to form.Nonmagnetic portion 13 is as the parts with first magnetic part 12 and 14 magnetic insulation of second magnetic part.Three parts that will form housing 11 with laser beam welding etc. connect in aggregates.Replacedly, can make nonmagnetic portion 13 for columniform a part of magnetic material by the heat treatment shaping.
On the top of housing 11, the inlet part 15 with inlet 16 is press fit in the endoporus of housing 11.The filter 17 that is used to remove the fuel impurities is placed in the inside of inlet part 15.By enter the mouth 16 and filter 17 supply fuel in the housing 11.One cylindrical spout fixture (bearing) 20 is connected to the bottom of housing 11.Cup-shaped nozzle body 30 is connected to the bottom of nozzle fixture 30 by press fit, welding etc.
In Fig. 1, show the tip part of nozzle body 30 with magnification ratio.Nozzle body 30 has the cone-shaped inner surface 31 that shrinks towards the tip.This cone-shaped inner surface 31 is as valve seat 32, and the conical outer surface 51 of pin (needle) 50 is placed on this valve seat 32.The bag part 33 that has barrel surface 331 and sphere 332 links to each other with conical surface 31.One end of first spray-hole 41 opens wide towards bag part 33, and the other end opens wide towards the outer surface of nozzle body 30.Similarly, an end of second spray-hole 42 opens wide towards bag part 33, and the other end opens wide towards the outer surface of valve body 30.
As shown in Figure 2, pin 50 places in housing 11, nozzle fixture 20 and the nozzle body 30.Pin 50 is supported within it slidably, thereby it can move vertically.As shown in Figure 1, pin 50 has the outer surface of assembling towards the tip.This outer surface comprises two conical surfaces 51 and 52, and hermetic unit 53 is formed between two conical surfaces 51 and 52.When pin was driven down, hermetic unit 53 was placed on the valve seat 32 of nozzle body 30.Fluid passage 21 is formed between the internal surface (conical surface 31 with valve seat 32) of the outer surface (being made up of conical surface 51,52) of pin 50 and nozzle body.
As shown in Figure 2, sparger 10 comprises the drive part 60 that is used for driving needle 50.Drive part 60 is made up of bobbin 61, coil 62, fixed iron core 63, movable core 64 and magnetic part 65.Bobbin 61 is made by resin material, and is configured as cylindrical.Bobbin 61 place cylindrical housings 11 around, coil 62 is wound on around the bobbin 61.Coil is electrically connected with terminal 23 in being supported on connector 22.The fixed iron core of being made by magnetic material 63 is configured as cylindrical, and links to each other with the endoporus of housing 11 by press fit etc.
The movable core of being made by magnetic material such as steel is supported in the endoporus of housing 11 slidably.The upper end of pin 50 links to each other with movable core 64, thereby pin 50 is driven vertically with movable core 64.Spring 66 places the endoporus of fixed iron core 63, and is compressed between adjutage 67 and the movable core 64, thus pin 50 biased downward that will link to each other with movable core 64.Utilize the bias force of spring 66 hermetic unit 53 of pin 50 can be placed on the valve seat 32.Can regulate the position of the adjutage 67 that links to each other with the endoporus of fixed iron core 63, thus the bias force of Regulation spring 66.Magnetic part 65 is made by magnetic material such as steel, and covers the periphery of coil 62.
When coil 62 is not energized, utilizes the bias force of spring 66 that pin 50 is placed on the valve seat 32 of valve body 30, and therefore spray- hole 41,42 is closed.When coil 62 was energized, the bias force of movable core 64 antagonistic springs 66 attracted on the fixed iron core 63, and pin 50 is upwards mentioned from valve seat 32, thereby opened spray- hole 41,42.
Now, with reference to figure 1 and 3, detailed description is formed on spray- hole 41,42 in the nozzle body 33.The wall that first spray-hole 41 and second spray-hole 42 pass nozzle body 30 forms.One end of spray- hole 41,42 opens wide towards the internal surface 30a of bag part 33, and its other end opens wide towards the outer surface of nozzle body 30.Compare with second spray-hole 42, first spray-hole 41 is nearer apart from valve seat 32.In other words, second spray-hole, 42 relative valve seats 32 are formed on the downstream of first spray-hole 41.Fluid passage 21 is formed between the outer surface of the internal surface of nozzle body 30 and pin 50.
Fig. 3 shows from the side view of the tip part of the nozzle body that direction III saw 30 of Fig. 1.First spray-hole 41 and second spray-hole 42 all are flat, and axially being disposed aligned mutually along nozzle body 30.Along perpendicular to the width W 1 of first spray-hole 41 of the axial orientation measurement of cup-shaped nozzle body 30 much larger than its height H 1 vertically.Similarly, the width W 2 of second spray-hole 42 is much larger than its height H 2.The cross sectional area of first spray-hole 41 (be W1 * H1) greater than the cross sectional area of second spray-hole 42 (is W2 * H2).Height H 1 equals height H 2 substantially.
Because first spray-hole, 41 to the second spray-holes, 42 more close fluid passages 21, so the hydrodynamic pressure by first spray-hole 41 is higher than the hydrodynamic pressure by second spray-hole 42.Therefore, eject a large amount of high-pressure liquids from first spray-hole 41, this high-pressure liquid is atomized into fine particle.On the other hand, increase the hydrodynamic pressure that ejects from second spray-hole 42, although this hydrodynamic pressure is lower than the hydrodynamic pressure that ejects from first spray-hole 41 when beginning by compression/extruded cross section area.Therefore, the fluid that ejects from second spray-hole 42 also is atomized into fine particle well.Therefore, the fluid that ejects from two spray- holes 41,42 is atomized into fine particle equally well.
Because the tip of nozzle body 30 is assembled as shown in figs. 1 and 3, so be difficult to make that the width W 2 of second spray-hole 42 is bigger.In addition, interfere, need make between two spray- holes 41,42 to maintain a certain distance for fear of the two fluid streams streams that eject from two spray-holes 41,42.This just makes that strengthening width W 2 becomes more difficult.On the other hand, can guarantee to be used for the enough big width W 1 of first spray-hole 41, this is because it is positioned at the root of nozzle body 30.Thereby, when second spray-hole 42 ejects the fluid of magnitude of recruitment, can eject the fluid of q.s from first spray-hole 41.Two fluid jet holes 41,42 all form has extremely thin transverse cross-sectional area.Therefore, the fluid of the atomizing of ejecting from two spray- holes 41,42 stream forms thin fluid film.This is favourable fluid atomizing being become aspect the fine particle.
By fluid passage 21 pressure fluid is supplied to bag part 33.Form the main flow (referring to Fig. 1) of fluid along the centre line L e between the conical outer surface 51 of the cone-shaped inner surface of nozzle body 30 and pin 50.The direction L1 and the L2 of the fluid passage in first spray-hole 41 and second spray-hole 42 do not align with centre line L e.Therefore, the opening that the main flow of the fluid of supplying with by fluid passage 21 can direct collision spray- hole 41,42, on the contrary, it collides on the internal surface 30a of two bag parts 33 between the opening.
Now the operation of sparger 10 will be described briefly.At coil 62 (referring to Fig. 2) when not being energized, the bias force that utilizes spring 66 places the hermetic unit 53 of pin 50 on the valve seat 32 of nozzle body 30.Thereby spray- hole 41,42 is closed.When coil 62 was energized, the bias force of movable core 64 antagonistic springs 66 that link to each other with pin 50 attracted on the fixed iron core 63.Hermetic unit 53 is mentioned from valve seat 32.Therefore, spray- hole 41,42 is opened, and fluid ejects from spray-hole 41,42.When coil 62 was de-energized, the magnetic force of mentioning pin 50 disappeared, and hermetic unit 53 is again placed on the valve seat 32 by means of the bias force of spring 66, thereby spray- hole 41,42 is closed.Therefore, ended the fluid jet of spray-hole.
As mentioned above, from the bigger nearer high-pressure liquid of first spray-hole, 41 jet length valve seats of cross section.Because pressure is higher, so the fluid that sprays is atomized into fine particle well.Cross sectional area by flow of compressed fluid increases from the pressure of the low fluid of relative pressure of distance valve seat 32 second spray-holes, 42 ejections far away.Therefore, the fluid from 42 ejections of second spray-hole also is atomized into fine particle.By this way, the fluid from 41,42 ejections of two spray-holes is atomized generally well.
Be used at sparger 10 under the situation of the equipment that is used for cleaning exhaust gas, the hydrodynamic pressure that supplies to sparger 10 is about several MPa (MPa), and it is lower than the fuel pressure of the sparger 10 that supplies in the system that is used in the firing chamber that injects fuel into internal-combustion engine.Therefore, in the sparger 10 of the system that is used for cleaning exhaust gas, the high-pressure liquid of close valve seat 32 is come out by forced jet from the first bigger spray-hole 41 of cross section.Thereby, can eject the fluid of the q.s of suitable atomizing from first spray-hole 41.
The atomizing of fluid promotes further by the flat cross section that approaches of spray- hole 41,42 that also this is because the fluid that sprays has formed thin spraying film.The main flow of the fluid of supplying with by fluid passage 21 does not have the opening of direct collision spray-hole 41,42.Therefore, the influence that the fluid that ejects from spray- hole 41,42 is not changed by position of mainstream, the change of described position of mainstream can be caused by the eccentricity of pin 50 relative valve bodies 30.This means that the fluid that ejects from spray- hole 41,42 can be stabilized and atomizing fully, and the influence that not changed by the main flow of the fluid supplied with.In addition, because the internal surface 30a between two openings of the main flow of supplying with collision spray- hole 41,42, the kinetic energy of supplying with fluid is converted to the energy that is used for atomizing fluids.
Describe the second embodiment of the present invention referring now to Fig. 4, it shows the side view of the tip part of nozzle body 30.In this embodiment, first spray-hole 71 and second spray-hole 72 are used to replace first embodiment's spray- hole 41,42, and for the cross-sectional dimension of first embodiment's first spray-hole 41, the cross-sectional dimension of first spray-hole 71 is strengthened.Other structures are identical with above-mentioned first embodiment's structure.
In this second embodiment, except the width W 4 of width W 3 greater than second spray-hole 72 of first spray-hole 71, the height H 3 of first spray-hole 71 is greater than the height H 4 of second spray-hole 72.In other words, the cross sectional area of first spray-hole 71 is much larger than the cross sectional area of second spray-hole 72.Although the fluid that ejects from first spray-hole 71 forms fluid column, if enough high near the hydrodynamic pressure of valve seat 32, the fluid that ejects from first spray-hole 71 will suitably be atomized.Requiring to spray in the application of a large amount of fluids, second embodiment is favourable.
The invention is not restricted to the embodiments described, but can have various variations.For example, the bag part 33 shown in Fig. 1 can be configured as simple hemisphere, and does not need to form barrel surface 331.Replacedly, bag part 33 can be configured as cylindrical.Although form two spray-holes in the aforementioned embodiment, also can form spray-hole more than two.
Although illustrated and described the present invention with reference to aforementioned preferred embodiments,, to one skilled in the art, clearly, under the situation that does not depart from scope of the present invention, can carry out multiple change to it in form and details.

Claims (4)

1. sparger (10) that is used for spraying pressure fluid, this sparger comprises:
Cup-shaped nozzle body (30), it has as the internal surface of valve seat (32) (31);
Pin (50) with outer surface (51), this pin (50) comprises a hermetic unit (53), one fluid passage (21) is formed between the outer surface (51) of the internal surface (31) of this nozzle body and this pin, this fluid passage (21) is closed when the hermetic unit (53) of this pin places the valve seat (32) of this valve body to go up, and opens when this valve seat is mentioned in the sealing part; And
At least two spray-holes (41,42), its wall that passes this nozzle body (30) forms, comprise first spray-hole (41) in the downstream that is formed at valve seat (32) and be formed at second spray-hole (42) in the more downstream of this first spray-hole, the cross section of this first spray-hole (41) is greater than the cross section of this second spray-hole (42), wherein:
From the valve seat (32) of this valve body when mentioning, pressure fluid is injected by this spray-hole (41,42) at the hermetic unit (53) of this pin.
2. sparger as claimed in claim 1 is characterized in that:
Along the axial orientation measurement perpendicular to this cup-shaped nozzle body (30), the cross-sectional width (W1) of first spray-hole (41) is greater than the cross-sectional width (W2) of second spray-hole (42).
3. sparger as claimed in claim 1 or 2 is characterized in that:
The direction (Le) of the fluid passage (21) between the outer surface (51) of the internal surface of this nozzle body (31) and this pin is not alignd with any one fluid passage (L1, L2) in this spray-hole (41,42).
4. sparger as claimed in claim 2 is characterized in that:
Along the axial measurement of this cup-shaped nozzle body, the cross-sectional height (H3) of this first spray-hole (41) is greater than the cross-sectional height (H4) of this second spray-hole (42).
CNB2005100702471A 2004-05-17 2005-05-13 Jet for spraying pressure fluid Expired - Fee Related CN100396909C (en)

Applications Claiming Priority (2)

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JP146071/2004 2004-05-17
JP2004146071A JP4129688B2 (en) 2004-05-17 2004-05-17 Fluid injection valve

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Cited By (3)

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CN106286057A (en) * 2015-06-24 2017-01-04 株式会社电装 Fuel injection nozzle
WO2019011033A1 (en) * 2017-07-11 2019-01-17 天纳克（苏州）排放系统有限公司 Injector
CN112112715A (en) * 2019-06-19 2020-12-22 株式会社电装 Fuel injection device

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DE102006044080B4 (en) * 2006-09-20 2023-10-12 Robert Bosch Gmbh Method for operating a reagent metering valve and device for carrying out the method
DE102006053556A1 (en) * 2006-11-14 2008-05-15 Purem Abgassysteme Gmbh & Co. Kg Device for dosing reducing agent and injector in a device for dosing reducing agent
DE602007010609D1 (en) * 2007-07-09 2010-12-30 Delphi Technologies Holding Dosing system for reagent
DE102009027693A1 (en) * 2009-07-14 2011-05-05 Robert Bosch Gmbh Dosing module for a liquid reducing agent

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JPH03117672A (en) * 1989-09-29 1991-05-20 Hino Motors Ltd Fuel injection device
JPH05321789A (en) * 1992-05-15 1993-12-07 Kubota Corp Multihole nozzle type fuel injection on valve for diesel engine
JPH08193560A (en) * 1994-11-15 1996-07-30 Zexel Corp Variable nozzle hole type fuel injection nozzle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106286057A (en) * 2015-06-24 2017-01-04 株式会社电装 Fuel injection nozzle
WO2019011033A1 (en) * 2017-07-11 2019-01-17 天纳克（苏州）排放系统有限公司 Injector
CN112112715A (en) * 2019-06-19 2020-12-22 株式会社电装 Fuel injection device

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JP4129688B2 (en) 2008-08-06
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CN100396909C (en) 2008-06-25

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