CN101539085B - Electromagnetic fuel injection valve - Google Patents
Electromagnetic fuel injection valve Download PDFInfo
- Publication number
- CN101539085B CN101539085B CN2009101288513A CN200910128851A CN101539085B CN 101539085 B CN101539085 B CN 101539085B CN 2009101288513 A CN2009101288513 A CN 2009101288513A CN 200910128851 A CN200910128851 A CN 200910128851A CN 101539085 B CN101539085 B CN 101539085B
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- Prior art keywords
- iron core
- coil
- coil assembly
- fixed iron
- valve
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Classifications
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
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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
- 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
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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
- 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
- F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
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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
- 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
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
An object of the present invention is to provide an electromagnetic fuel injection valve in which the strength of a coil assembly can be enhanced while the reduction in cross-sectional area of magnetic path of a coil housing is prevented, and moreover the sound insulating properties are excellent. In an electromagnetic fuel injection valve, a first sound insulating resin layer (41) is formed at the outer periphery of a coil assembly (30), and the first sound insulating resin layer (41) and a coupler (42) are molded integrally to form the coil assembly (30) with the coupler (42); a bobbin (31) of the coil assembly (30) with the coupler (42) is fitted onto the outer peripheral surfaces of a valve housing (1) and a stationary core (5), and a sound insulating air layer (43) is formed between the fitted peripheral surfaces; a coil housing (45) for accommodating the coil assembly (30) with the coupler (42) is fitted and fixed to the valve housing (1) and the stationary core (5); and a second sound insulating resin layer (49) is formed so as to cover the outer periphery of the valve housing (1) and the outer periphery of the root of the coupler (42).
Description
Technical field
The present invention relates to a kind of electro-magneto fuel injector that mainly is used in the fuel supply system of internal-combustion engine; Be particularly related to a kind of improvement of the electro-magneto fuel injector that is described below; The valve pocket of this electro-magneto fuel injector has valve seat at front end; Taken in valve assembly in this valve pocket; This valve assembly is connected with fixed iron core by assisting moving spool and the moving core that engages with this spool to constitute with said valve seat in the rear end of valve pocket, and this fixed iron core attracts moving core and said spool is opened when being energized; Periphery in the scope from said valve pocket to fixed iron core is equipped with coil assembly; This coil assembly by bobbin with reel be installed on this bobbin and when the energising coil of excitation fixed iron core constitute, and be equipped with the joiner that is used to keep the power supply terminal that links to each other with coil, the coil housing of magnetic connection between the periphery of coil assembly is equipped with valve pocket and fixed iron core in a side of this coil assembly.
Background technique
Said electro-magneto fuel injector for example patent documentation 1 disclosed that kind by known.
Patent documentation 1: TOHKEMY 2005-240731 communique
In the past; In said electro-magneto fuel injector; Known have such technology: the action sound that produces when spool is carried out on-off action in valve pocket cuts off obtaining quietness, is formed with the sound insulation resin layer in the periphery of valve pocket, coil assembly and fixed iron core.
Yet, in the prior art, when being shaped above-mentioned sound insulation resin layer; Can will be penetrated in the coil housing, and be rolled on the coil assembly, improve the intensity of coil assembly as raw-material resin; In this case; On coil housing, be provided with a plurality of otch that are used to promote the resin infiltration, yet, a plurality of bigger otch need be set on coil housing in order to be penetrated into reliably on the coil assembly.But, because these otch can cause the magnetic circuit sectional area in the coil housing to reduce, so be not preferred on the magnetic force property of electro-magneto fuel injector.
Summary of the invention
The present invention In view of the foregoing accomplishes, and its purpose is to provide a kind of intensity and good electro-magneto fuel injector of sound insulation property that when the magnetic circuit sectional area that prevents coil housing reduces, can improve coil assembly.
In order to reach above-mentioned purpose; The valve pocket of electro-magneto fuel injector of the present invention has valve seat at front end; Taken in valve assembly in this valve pocket; This valve assembly is by assisting moving spool and the moving core that engages with this spool to constitute with said valve seat; Rear end at valve pocket is connected with fixed iron core; This fixed iron core attracts moving core and said spool is opened when being energized, the periphery of (To
り) is equipped with coil assembly in the scope from said valve pocket to fixed iron core, and this coil assembly is made up of bobbin and coil; Said coil is reeled and is installed on this bobbin; And, be equipped with the joiner that is used to keep the power supply terminal that links to each other with coil, the coil housing that magnetic couples together between the periphery of coil assembly is equipped with valve pocket and fixed iron core in a side of this coil assembly at when energising excitation fixed iron core; First of this electro-magneto fuel injector is characterised in that; Periphery at coil assembly is formed with the first sound insulation resin layer, and this first sound insulation resin layer and joiner are shaped integratedly, thereby has constituted the coil assembly of band joiner; The bobbin of the coil assembly of this band joiner is embedded in the outer circumferential face of valve pocket and fixed iron core; And between their chimeric side face, form the air layer that sound insulation is used, be used to take in the chimeric valve pocket and the fixed iron core of being fixed in of coil housing of the coil assembly of this band joiner, and be formed with the second sound insulation resin layer with the mode of the periphery of the periphery that covers this valve pocket and joiner root.
In addition, on the basis of first characteristic, of the present invention second is characterised in that coil housing is by constituting with the bottom: body, and it covers the outer circumferential face side of coil assembly; The ring-type end wall, its from the front end of this body to the radial direction inside bend; And boss part; Its outstanding and chimeric being fixed on the valve pocket in axial the place ahead of interior Zhou Duanxiang from this ring-type end wall; On fixed iron core, form flange shape yoke, this yoke is chimeric to be fixed on the said body, thereby assists moving ground clamping bobbin vertically with said ring-type end wall.
Have again; On the basis of second characteristic; The of the present invention the 3rd is characterised in that, plastic bobbin axially at least one end face on be formed with a plurality of projections, said projection is with said ring-type end wall or yoke contacts and compressive strain can take place.
In addition; On the basis of first characteristic; The of the present invention the 4th is characterised in that; Be provided with the vertical hole with the valve pocket internal communication at the central part of fixed iron core, and on said yoke, be connected with the external diameter fuel inlet tube bigger than fixed iron core integratedly, this fuel inlet tube imports fuel in the said vertical hole.
The invention effect
In accordance with a first feature of the invention; Periphery at coil assembly is formed with the first sound insulation resin layer, and this first sound insulation resin layer and joiner be shaped integratedly, thereby has constituted the coil assembly of band joiner; The bobbin of the coil assembly of this band joiner is embedded in the outer circumferential face of valve pocket and fixed iron core; And between their chimeric side face, form the air layer that sound insulation is used, be used to take in the chimeric valve pocket and the fixed iron core of being fixed in of coil housing of the coil assembly of this band joiner, and be formed with the second sound insulation resin layer with the mode of the periphery of the periphery that covers this valve pocket and joiner root; Thereby; Need not on coil housing, to be provided for permeating the otch of the first sound insulation resin layer, can suppress the reducing of magnetic circuit sectional area of coil housing, thereby help the raising of the magnetic force property of electro-magneto fuel injector.In addition; Even for it need be provided with at the body of coil housing with local fusion of the first sound insulation resin layer under the situation of otch or open-work that resin permeates usefulness, to influence the magnetic circuit of coil housing sectional area hardly so little as long as this otch or open-work formed.
In addition; At valve pocket and fixed iron core, and surround the sound insulation air layer that is provided with between their coil assembly and significantly reduced the area of contact between valve pocket and fixed iron core and the coil assembly, and can suppress of the transmission of above-mentioned vebrato effectively to coil assembly.And; Owing to be formed with the first sound insulation resin layer with the integrally formed hard resin system of joiner in the periphery of coil assembly; Even so exist a little to be passed to the vebrato of coil assembly; Owing to can utilize the first sound insulation resin layer that it is sponged, also can prevent by the joiner noise of empathizing.Have again; Be equipped with coil housing in the first sound insulation resin layer periphery; Chimeric valve pocket and the fixed iron core of being fixed in of this coil housing, and be formed with the second sound insulation resin layer with the mode of the periphery of the root that surrounds this coil housing, joiner and fuel inlet tube, so even exist a little to pass the vebrato of the first sound insulation resin layer; Also can be through coil housing and the second sound insulation resin layer with this vebrato sound insulation; And can suppress radiation sound, as stated, quiet electro-magneto fuel injector can be provided from coil housing and fuel inlet tube.
When electro-magneto fuel injector is made; The coil assembly of the band joiner of making in advance is embedded in after the periphery of valve pocket and fixed iron core, and the chimeric magnetic cylindrical body and the yoke of being fixed in of coil housing that will be used to take in coil assembly is so can fix the coil assembly of band joiner when coil housing is installed; So assembling is simple; In addition, through will being fixed on valve pocket and the fixed iron core, thereby can easily carry out the shaping of the ensuing second sound insulation resin layer with the coil assembly of joiner; Generally speaking, can make electro-magneto fuel injector efficiently.
According to second characteristic of the present invention, can support coil assembly through coil housing and yoke simple and reliablely.
According to the 3rd characteristic of the present invention, by means of the compressive strain of said projection, can non-loosening and reliably bobbin is clipped between coil housing and the yoke.
According to the 4th characteristic of the present invention; Bigger through making the fuel inlet tubular that is connected setting with the flange shape yoke of fixed iron core become diameter than fixed iron core; Make the fuel inlet tube help to strengthen the rigidity of fixed iron core, thus the vibration of the fixed iron core that can suppress to cause by said vebrato.
Description of drawings
Fig. 1 is the longitudinal section of the described internal-combustion engine of the first embodiment of the present invention with electro-magneto fuel injector.
Fig. 2 is 2 enlarged views of Fig. 1.
Fig. 3 is the independent longitudinal section of the coil assembly of the band joiner in the above-mentioned electro-magneto fuel injector.
Fig. 4 representes the second embodiment of the present invention, is and the corresponding sectional view of Fig. 2.
Label declaration
I: electro-magneto fuel injector;
V: valve assembly;
1: valve pocket;
5: fixed iron core;
8: valve seat;
12: moving core;
18: spool;
21: vertical hole;
26: the fuel inlet tube;
30: coil assembly;
31: bobbin;
32: coil;
34: power supply terminal;
41: the first sound insulation resin layers;
42: joiner;
43: air layer;
45: coil housing;
45a: body;
45b: ring-type end wall;
45c: boss part;
47: projection;
49: the second sound insulation resin layers.
Embodiment
Below, based on the preferred embodiments of the present invention shown in the drawings mode of execution of the present invention is described.
Fig. 1 is the longitudinal section of the described internal-combustion engine of the first embodiment of the present invention with electro-magneto fuel injector; Fig. 2 is 2 enlarged views of Fig. 1; Fig. 3 is the independent longitudinal section of the coil assembly of the band joiner in the above-mentioned electro-magneto fuel injector; Fig. 4 representes the second embodiment of the present invention, is and the corresponding sectional view of Fig. 2.
At first, begin Fig. 1～first embodiment of the present invention shown in Figure 3 is described.
In Fig. 1 and Fig. 2, internal-combustion engine with the valve pocket 1 of electro-magneto fuel injector I by constituting with the bottom: valve base part 2 cylindraceous; With the coaxial magnetic cylindrical body 4 that engages of the rearward end of this valve base part 2; And with the coaxial non-magnetic cylinder body 6 that engages in the rear end of this magnetic cylindrical body 4.
The latter half of 2b of valve base part 2 is pressed in the front end inner peripheral surface of magnetic cylindrical body 4, and thickly is joined together by liquid through laser beam welding.This is pressed into laser beam welding and describes in the back.And magnetic cylindrical body 4 is docked with the opposed end face that non-magnetic cylinder body 6 constitutes them, and on complete cycle, thickly is joined together by coaxial and liquid each other through laser beam welding.
Valve base part 2 comprises: towards the valve opening 7 of the front-end face opening of valve base part 2; The coniform valve seat 8 that links to each other with the inner of this valve opening 7; And the pilot hole cylindraceous 9 that links to each other with the large-diameter portion of this valve seat 8.The front-end face of valve base part 2 liquid on complete cycle thickly is welded with the jet tray 10 of steel plate system, and this jet tray 10 has a plurality of fuel jet orifices 11 that are communicated with above-mentioned valve opening 7.
On the inner peripheral surface of non-magnetic cylinder body 6, thickly be pressed into and be fixed with fixed iron core 5 cylindraceous from distolateral liquid thereafter.At this moment, on the front-end face of non-magnetic cylinder body 6, leave not the part chimeric, taking in valve assembly V in the valve pocket 1 till 2 from this part to valve base part with fixed iron core 5.
Valve assembly V is by constituting with the bottom: spool 18, and it is by open and close the hemispheric valve portion 16 of valve opening 7 with said valve seat 8 associations and the valve stem 17 of this valve portion 16 of support constitutes movingly; And moving core 12, it has the attachment hole 13 of the chimeric connection of rearward end that supplies valve stem 17, and valve stem 17 is embedded in the attachment hole 13 up to abutting to its end wall 13a.And then through welding with interfixing between valve stem 17 and the moving core 12.
Moving core 12 is positioned at from magnetic cylindrical body 4 and is cross over the scope on the non-magnetic cylinder body 6, and is inserted in magnetic cylindrical body 4 and the non-magnetic cylinder body 6, and is coaxial opposed with fixed iron core 5.It is littler than said pilot hole 9 that valve stem 17 forms diameter; And the periphery in valve stem 17 has formed collar 17a; This collar 17a is outstanding to the radial direction outside; And can be slidably supported in the inner peripheral surface of said pilot hole 9, be provided with a plurality of otch that make connection between its front and back on this collar 17a.
On valve assembly V, be provided with vertical hole 19 and cross-drilled hole 20, this vertical hole 19 begins till the side nearby of valve portion 16 from the ear end face of moving core 12, and this cross-drilled hole 20 makes this vertical hole 19 unlimited towards the first collar 17a and the outer circumferential face between the valve portion 16 of valve stem 17.Be formed with spring seat 24 in the way in the vertical hole 19 in moving core 12 towards the ring-type of fixed iron core 5 sides.
Rearward end at fixed iron core 5 is connected with integratedly: flange shape yoke 5y, and its outer circumferential face by the rearward end of fixed iron core 5 is outstanding; And fuel inlet tube 26, it extends to axial rearward direction from this yoke 5y, and diameter is bigger than fixed iron core 5.In these fixed iron cores 5 and fuel inlet tube 26, be provided with the continuous vertical hole 21 that is communicated with the vertical hole 19 of moving core 12; And should become wide diameter portion 21a greatly in the inlet side diameter change of fuel inlet tube 26 in vertical hole 21, on this wide diameter portion 21a, fuel filter 27 was installed.
On the intermediate portion inner peripheral surface in above-mentioned vertical hole 21, be fixed with the tubulose retainer 23 of being with grooving with the chimeric mode of elasticity; Compression is provided with valve spring 22 between this retainer 23 and said spring seat 24, and 22 pairs of moving cores 12 of this valve spring are closed the side application of force to spool 18.At this moment, be embedded into the setting load that the chimeric degree of depth in the vertical hole 21 is regulated valve spring 22 through regulating retainer 23.
In Fig. 1 and Fig. 2, fixed iron core 5 and moving core 12 end faces opposite each other are called fixed side sucking action face 35 and active side sucking action face 36, fixed iron core 5 comprises: minor diameter part 5a, it has fixed side sucking action face 35; With the main 5b of portion; It links to each other with coaxial shape with this minor diameter part 5a via the 5c of annular stepped portion; And diameter is bigger than minor diameter part 5a; So that the mode that the inner peripheral surface of the front end outer circumferential face of this little neck 5a and non-magnetic cylinder body 6 closely contacts is pressed into minor diameter part 5a in non-magnetic cylinder body 6 latter half of, and make the ear end face of minor diameter part 5a equal with the 5c of annular stepped portion.
On the other hand, it is roughly the same that moving core 12 forms the minor diameter part 5a of radius and fixed iron core 5.In moving core 12, be embedded with nonmagnetic baffle ring 28; This baffle ring 28 is in said vertical hole 19; And outstanding slightly from active side sucking action face 36, through making fixed side sucking action face 35 butts of this baffle ring 28 and fixed iron core 5, limit the action boundary of moving core 12 with this.
In order to adjust the stroke of opening of spool 18, the gap that in other words between fixed side sucking action face 35 and baffle ring 28, will produce in order to close spool 18 time is adjusted into predetermined value, regulating valve seat parts 2 to be pressed in the compression distance of magnetic cylindrical body 4 inner peripheral surfaces.Finish after this adjusting; Through welding, thereby fixedly be pressed into portion reliably and guarantee that liquid is close by laser head (laser torch) 40 illuminating laser beam B from bight, the border complete cycle of the outer circumferential face of the front-end face of oblique the place ahead magnetropism cylindrical body 4 and valve base part 2.Yet; With regard to character; Valve base part 2 is formed by the high material of hardness of hardness ratio magnetic cylindrical body 4, so in this case, needs only so that the point of irradiation of laser beam B welds from valve base part 2 and the mode that border magnetropism cylindrical body 4 lateral deviations of magnetic cylindrical body 4 are moved; Just can avoid laser beam B directly in the valve base part 2 of high hardness, to import heat, thereby can prevent that valve base part 2 from producing weld crack.
In order to improve the rigidity of valve seat 8 peripheries; Make the first half 2a of valve base part 2 form wall thickness and diameter is all big than the latter half of 2b that is pressed in the magnetic cylindrical body 4, between said first half 2a and latter half of 2b, be formed with the taper end difference 2c that more rearward diameter is more little.This taper end difference 2c can not hinder from laser head 40 to said weld part illuminating laser beam B.
As shown in Figures 2 and 3, the periphery in 5 the scope from magnetic cylindrical body 4 to fixed iron core is equipped with coil assembly 30.This coil assembly 30 is made up of bobbin 31 and coil 32; This bobbin 31 is embedded in from magnetic cylindrical body 4 to fixed iron core 5 periphery; This coil 32 is reeled and is installed on this bobbin 31; On the lip part of the rear end of bobbin 31, formed support arm 33, this support arm 33 is outstanding to the radial direction of bobbin 31, and the power supply terminal 34 that links to each other with coil 32 of support.
Periphery at this coil assembly 30 is formed with the first sound insulation resin layer 41 that is made up of the hard resin that has added glass fibre; And through making this first sound insulation resin layer 41 and disposing to one of coil assembly 30 side-prominent mode and to keep the joiner 42 of said power supply terminal 34 integrally formed, thereby constituted the coil assembly 30 of band joiner 42.
At the inner peripheral surface of the bobbin 31 of the coil assembly 30 of band joiner 42 and the outer circumferential face in from the rearward end of magnetic cylindrical body 4 to fixed iron core 5 scopes, mark off sound insulation cylindraceous with air layer 43.In order to mark off this air layer 43, at the suitable annular slot 44 of thickness that has formed the degree of depth and air layer 43 from the rearward end of magnetic cylindrical body 4 to the outer circumferential face in fixed iron core 5 scopes.Can easily form this annular slot 44 through cutting.
The coil assembly 30 of above-mentioned band joiner 42 is accommodated in the coil housing 45 as magnetic, and this coil assembly 30 is by the said yoke 5y clamping vertically of the ring-type end wall 45b of this coil housing 45 and fixed iron core 5 peripheries.Specifically, coil housing 45 is by constituting with the bottom: body 45a, and it covers the outer circumferential face of coil assembly 30; Ring-type end wall 45b, its from the front end of this body 45a to the radial direction inside bend and cover bobbin 31 front-end faces of coil assembly 30; And boss part 45c cylindraceous, its front end from this ring-type end wall 45b is forwards outstanding, and the outer circumferential face of magnetic cylindrical body 4 is pressed in boss part 45c, and body 45a is forced on the outer circumferential face of yoke 5y simultaneously.Like this, coil housing 45 is mounted, and the bobbin 31 of the coil assembly 30 of band joiner 42 is sandwiched between ring-type end wall 45b and the yoke 5y.At this moment, on the front-end face of bobbin 31 and at least one side in the ear end face, be formed with a plurality of projections 47, these projections 47 receive the pressure of butt parts 45b or 5y and compressive strain take place.
On the rearward end of the body 45a of coil housing 45, be formed with an otch 48, this otch 48 is used to take in the root of said joiner 42.
After installing coil housing 45, the centre of 42 root and fuel inlet tube 26 is formed with the second sound insulation resin layer 49 of the outer circumferential face that covers them from coil housing 45 to coupling piece.This second sound insulation resin layer 49 is raw material with soft synthetic resins such as thermoplastic polyester elastic materials.
Next, the effect to this first embodiment describes.
Under the state of coil 32 demagnetization, valve assembly V receives the active force of valve spring 22 and is forwards pushed, thereby spool 18 is seated in the valve seat 8.Therefore, never illustrated petrolift is passed retainer 23 inside of tubulose, vertical hole 19 and the cross-drilled hole 20 of valve assembly V by the fuel in force feed to the fuel inlet tube 26, thereby standby is in valve casing 1.
When energising comes drive coil 32; The magnetic flux that produces therefrom passes coil housing 45, magnetic cylindrical body 4, moving core 12 and fixed iron core 5 successively; Thereby between active side sucking action face 36 and fixed side sucking action face 35, produce magnetic force; The formed attraction force of this magnetic force makes moving core 12 overcome the setting load of valve spring 22 and attracted to fixed iron core 5, thereby spool 18 breaks away from from valve seat 8, so valve opening 7 is opened; Fuel under high pressure in the valve base part 2 flows out from valve opening 7, and sprays towards the intake valve of motor from the fuel jet orifice 11 of jet tray 10.
At this moment, be embedded in fixed side sucking action face 35 butts of baffle ring 28 and fixed iron core 5 in the moving core 12, thus define spool 18 open the valve boundary, residual between active side sucking action face 36 and active side sucking action face 35 have a predetermined air gap.Therefore, avoided direct contact of active side sucking action face 36 with fixed side sucking action face 35.And, because baffle ring 28 is non magnetic, so when coil 32 demagnetizations, two unshakable in one's determination 5, the residual magnetic between 12 can rapidly disappear, thereby can improve spool 18 close response valve property.
Such as stated; Baffle ring 28 is attended by the generation of vebrato when being seated in the valve seat 8 with fixed iron core 5 butts and spool 18; When this vebrato is passed to joiner 42 via valve pocket 1 and fixed iron core 5; Joiner 42 can send the sympathetic response noise, yet in the present invention, the sound insulation air layer 43 that between valve pocket 1 and fixed iron core 5 and their coil assembly 30 of encirclement, is provided with; Significantly reduced the area of contact between valve pocket 1 and fixed iron core 5 and the coil assembly 30, and suppressed of the transmission of above-mentioned vebrato effectively to coil assembly 30.And; Owing to be formed with the first sound insulation resin layer 41 with the integrally formed hard resin system of joiner 42 in the periphery of coil assembly 30; Even so exist a little to be passed to the vebrato of coil assembly 30; Owing to can utilize the first sound insulation resin layer 41 that it is sponged, so can prevent by joiner 42 noise of empathizing.In addition, owing to being to add to have the hard resin of glass fibre to process, so can make joiner 42 have enough rigidity with the joiner 42 first integrally formed sound insulation resin layers 41.
Have again; Be equipped with coil housing 45 in the first sound insulation resin layer, 41 peripheries; This coil housing 45 is connected with yoke 5y is chimeric with valve pocket 1; And the mode with the periphery of the root that wraps up this coil housing 45, joiner 42 and fuel inlet tube 26 is formed with the second sound insulation resin layer 49; Even so the vebrato that exists a little to pass the first sound insulation resin layer 41, also can be through coil housing 45 and the second sound insulation resin layer 49 with this vebrato sound insulation, and can suppress to produce the radiation sounds by coil housing 45 and fuel inlet tube 26.In addition, because the second sound insulation resin layer 49 is soft synthetic resin systems, can sponge the collision when contact, so played the protective layer function of protecting electro-magneto fuel injector I with other materials.
When making electro-magneto fuel injector I; The coil assembly 30 of the band joiner of making in advance 42 is embedded in after the periphery of valve pocket 1 and fixed iron core 5; The coil housing 45 that will be used to take in coil assembly 30 is chimeric with yoke 5y with magnetic cylindrical body 4; Thereby the bobbin 31 of coil assembly 30 is clipped between the ring-type end wall 45b and yoke 5y of coil housing 45 vertically, thus can, fix coil housing 45 when being installed the coil assembly 30 of band joiner 42, so assembling is simple; And through being fixed on the coil assembly 30 of joiner 42 on valve pocket 1 and the fixed iron core 5; Thereby can easily carry out the shaping of the ensuing second sound insulation resin layer 49, in terms of overall, can make electro-magneto fuel injector I efficiently.
At this moment; On the front-end face of the bobbin 31 of coil assembly 30 and at least one side in the ear end face, be formed with a plurality of projections 47; These projections 47 are compressed distortion because of the pressure that connects with ring-type end wall 45b or yoke 5y, thus can with bobbin 31 non-loosenings and be clipped in ring-type end wall 45b reliably and yoke 5y between.
And; Except an otch 48 of the root that is used to take in joiner 42; Need not on the body 45a of the coil housing 45 that is equipped on the first sound insulation resin layer, 41 peripheries, to be provided with the otch that makes 41 infiltrations of the first sound insulation resin layer; So can with the magnetic circuit sectional area of coil housing 45 reduce to be suppressed to bottom line, help the raising of the magnetic force property of electro-magneto fuel injector I.In addition; Even for the second sound insulation resin layer 49 is provided with on need the body 45a at coil housing 45 with the first sound insulation resin layer, 41 local fusions under the situation of otch or open-work that resin permeates usefulness, to influence the magnetic circuit of coil housing 45 sectional area hardly so little as long as this otch or open-work formed.
In addition; Connect the fuel inlet tube 26 of setting integratedly in the rear vertically from the flange shape yoke 5y of fixed iron core 5; It is bigger than fixed iron core 5 to form diameter, so help to strengthen the rigidity of fixed iron core 5, the vibration of the fixed iron core 5 that can suppress to be caused by said vebrato.
Next, the second embodiment of the present invention shown in Figure 4 is described.This second embodiment is except the inner peripheral surface at bobbin 31 forms annular slot 44 ' this respect in order to form air layer 43 at bobbin 31 and from magnetic cylindrical body 4 to fixed iron core the outer circumferential face in 5 scopes; Other structures are all identical with aforesaid embodiment; So the part corresponding with aforesaid embodiment is marked with same reference number, and omit repeat specification.
According to this second embodiment, can when the bobbin 31 of shaping synthetic resin system, form annular slot 44 ', so can easily form air layer 43.
Above embodiments of the invention are illustrated, yet the invention is not restricted to this, can in the scope that does not break away from purport of the present invention, carry out various design alterations.For example, also can when forming air layer 43, adopt simultaneously first embodiment fixed iron core 5 sides annular slot 44 and second embodiment bobbin 31 sides annular slot 44 '.
Claims (4)
1. electro-magneto fuel injector; The valve pocket of this electro-magneto fuel injector (1) has valve seat (8) at front end; In this valve pocket (1), taken in valve assembly (V); This valve assembly (V) is made up of the moving core (12) of assisting moving spool (18) with said valve seat (8) and engage with this spool (18), is connected with fixed iron core (5) in the rear end of valve pocket (1), and this fixed iron core (5) attracts moving core (12) and said spool (18) is opened when being energized; Periphery in from said valve pocket (1) to the scope of fixed iron core (5) is equipped with coil assembly (30); This coil assembly (30) is made up of bobbin (31) and coil (32), and said coil (32) is reeled and is installed on this bobbin (31), and when energising, encourages fixed iron core (5); Be equipped with the joiner (42) that is used for keeping the power supply terminal (34) that links to each other with coil (32) in the side of this coil assembly (30); The coil housing (45) that magnetic couples together between the periphery of coil assembly (30) is equipped with valve pocket (1) and fixed iron core (5), this electro-magneto fuel injector is characterised in that
Periphery at coil assembly (30) is formed with the first sound insulation resin layer (41); And this first sound insulation resin layer (41) and joiner (42) are shaped integratedly; Thereby constituted the coil assembly (30) of band joiner (42); The bobbin (31) of the coil assembly (30) of this band joiner (42) is embedded in the outer circumferential face of valve pocket (1) and fixed iron core (5); And between their chimeric side face, form the air layer (43) that sound insulation is used; Be used to take in the chimeric valve pocket (1) and the fixed iron core (5) of being fixed in of coil housing (45) of the coil assembly (30) of this band joiner (42), and be formed with the second sound insulation resin layer (49) with the mode of the periphery of the periphery that covers this valve pocket (1) and joiner (42) root.
2. electro-magneto fuel injector according to claim 1 is characterized in that,
Coil housing (45) is by constituting with the bottom: body (45a), and it covers the outer circumferential face side of coil assembly (30); Ring-type end wall (45b), its from the front end of this body (45a) to the radial direction inside bend; And boss part (45c); Its outstanding and chimeric being fixed on the valve pocket (1) in axial the place ahead of interior Zhou Duanxiang from this ring-type end wall (45b); On fixed iron core (5), form flange shape yoke (5y); This yoke (5y) is chimeric to be fixed on the said body (45a), thereby moves ground clamping bobbin (31) vertically with said ring-type end wall (45b) association.
3. electro-magneto fuel injector according to claim 2 is characterized in that,
Plastic bobbin (31) axially at least one end face on be formed with a plurality of projections (47), said projection (47) contacts with said ring-type end wall (45b) or yoke (5y) and compressive strain can take place.
4. electro-magneto fuel injector according to claim 2 is characterized in that,
Be provided with the vertical hole (21) with valve pocket (1) internal communication at the central part of fixed iron core (5); And on said yoke (5y), be connected with the external diameter fuel inlet tube (26) bigger than fixed iron core (5) integratedly, this fuel inlet tube (26) imports fuel in the said vertical hole (21).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008069977A JP4897728B2 (en) | 2008-03-18 | 2008-03-18 | Electromagnetic fuel injection valve |
| JP2008069977 | 2008-03-18 | ||
| JP2008-069977 | 2008-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101539085A CN101539085A (en) | 2009-09-23 |
| CN101539085B true CN101539085B (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101288513A Active CN101539085B (en) | 2008-03-18 | 2009-03-17 | Electromagnetic fuel injection valve |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2103803B1 (en) |
| JP (1) | JP4897728B2 (en) |
| CN (1) | CN101539085B (en) |
| DE (1) | DE602009000026D1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010031277A1 (en) * | 2010-07-13 | 2012-01-19 | Robert Bosch Gmbh | Fuel injector with reduced number of components |
| CN102102608B (en) * | 2010-09-08 | 2012-07-04 | 柳州源创电喷技术有限公司 | High-speed response electromagnetic valve type fuel injector for motorcycle |
| JP6061074B2 (en) * | 2012-09-28 | 2017-01-18 | 株式会社ケーヒン | Fuel injection valve |
| JP6337391B2 (en) * | 2014-03-24 | 2018-06-06 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
| JP6344940B2 (en) * | 2014-03-24 | 2018-06-20 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
| DE102015212390A1 (en) * | 2015-07-02 | 2017-01-05 | Robert Bosch Gmbh | Electromagnetically operated suction valve for a high-pressure pump and high-pressure pump |
| DE102016208288A1 (en) * | 2016-05-13 | 2017-11-16 | Robert Bosch Gmbh | Injector with improved magnetic actuator |
| SE545561C2 (en) * | 2021-11-26 | 2023-10-24 | Oehlins Racing Ab | Coil assembly for an actively controlled damping valve assembly of a vehicle |
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| CN1774573A (en) * | 2003-03-24 | 2006-05-17 | 株式会社京浜 | Electromagnetic fuel injection valve |
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| JPH10196488A (en) * | 1997-01-08 | 1998-07-28 | Aisan Ind Co Ltd | Electromagnetic fuel injection valve |
| JP2003166455A (en) * | 2001-11-30 | 2003-06-13 | Mikuni Corp | Electronically controlled fuel injection system |
| JP2005098172A (en) * | 2003-09-24 | 2005-04-14 | Honda Motor Co Ltd | Fuel injection valve |
| JP3981093B2 (en) * | 2004-03-09 | 2007-09-26 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
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| JP2006083808A (en) * | 2004-09-17 | 2006-03-30 | Keihin Corp | Solenoid-operated fuel injection valve |
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| US7187262B1 (en) * | 2005-08-15 | 2007-03-06 | Delphi Technologies, Inc. | Plastic sealing of solenoid bobbins |
| JP2009013917A (en) * | 2007-07-06 | 2009-01-22 | Bosch Corp | Fuel injection valve |
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2008
- 2008-03-18 JP JP2008069977A patent/JP4897728B2/en active Active
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2009
- 2009-03-09 DE DE200960000026 patent/DE602009000026D1/en active Active
- 2009-03-09 EP EP20090154682 patent/EP2103803B1/en active Active
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1774573A (en) * | 2003-03-24 | 2006-05-17 | 株式会社京浜 | Electromagnetic fuel injection valve |
| CN1532398A (en) * | 2003-03-25 | 2004-09-29 | ����ϲ�� | Fuel jet valve |
| CN101027474A (en) * | 2004-09-27 | 2007-08-29 | 株式会社京浜 | Solenoid fuel injection valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009222020A (en) | 2009-10-01 |
| JP4897728B2 (en) | 2012-03-14 |
| EP2103803A1 (en) | 2009-09-23 |
| EP2103803B1 (en) | 2010-05-12 |
| CN101539085A (en) | 2009-09-23 |
| DE602009000026D1 (en) | 2010-06-24 |
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Effective date of registration: 20220107 Address after: Ibaraki Patentee after: Hitachi astemo Co.,Ltd. Address before: Tokyo Patentee before: KEIHIN Corp. |