CN100504060C - Electromagnetic fuel injection valve - Google Patents
Electromagnetic fuel injection valve Download PDFInfo
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- CN100504060C CN100504060C CNB2005800061466A CN200580006146A CN100504060C CN 100504060 C CN100504060 C CN 100504060C CN B2005800061466 A CNB2005800061466 A CN B2005800061466A CN 200580006146 A CN200580006146 A CN 200580006146A CN 100504060 C CN100504060 C CN 100504060C
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Abstract
An electromagnetic fuel injection valve has a synthetic resin molding section that integrally has a coupler exposing a connection terminal continuous to a coil of a coil assembly and in which a portion of at least a solenoid housing is embedded. The resin molding section (7) has a first resin molding layer (7a) and a second resin molding layer (7b). The first resin molding layer (7a) covers a portion of at least the solenoid housing (25), constructs at least a portion of the coupler (40), and is formed of a synthetic resin in which glass fibers are mixed. The second resin molding layer (7b) covers the first resin molding layer (7a) and is formed of a thermoplastic polyester elastomer where glass fibers are not mixed. As a result, generation of operation noise is effectively suppressed with strength sufficient to secure reliability of an electric connection section achieved, and also the injection valve can be made compact.
Description
Technical field
The present invention relates to electro-magneto fuel injector, be particularly related to so a kind of electro-magneto fuel injector: comprising: the valve working part, it constitutes and contain valve body in valve chest, and described valve chest has valve seat at front end, and described valve body is applied elastic force to the direction that falls to being positioned at described valve seat; Electromagnet portion, it constitutes and contain the coil assembly body in electromagnet housing, the setting of ining succession of described electromagnet housing and described valve chest, described coil assembling body can produce to the electromagnetic force of leaving the described valve body of described valve seat one side drive, and the resin formation part made of synthetic resin, described resin formation part has integratedly and is subjected to electricity to use connector, and an envelope part of burying described electromagnet housing at least, the described splicing ear that linked to each other towards coil with connector by electricity with described coil assembly body.
Background technique
In this electro-magneto fuel injector, in order to suppress the generation of operational noise, known have such injection valve: the sound-insulating cover made from rubber covers the injection valve of Fuelinjection nozzle integral body (with reference to patent documentation 1.); Be subjected to electricity further to cover vibration absorber with using to have, and the injection valve of the part of described vibration absorber covering electromagnet housing is (with reference to patent documentation 2 with the resin formation part of connector.)。
Patent documentation 1: Japanese patent gazette spy opens clear 62-No. 195452
Patent documentation 2: Japanese patent gazette spy opens clear 63-No. 41658
As above-mentioned patent documentation 1 is disclosed, covering with sound-insulating cover in the injection valve of injection valve integral body, because of the whole relation that maximizes of Fuelinjection nozzle, be difficult to be applied in the restricted situation of configuration space of electro-magneto fuel injectors such as automatic two-wheeled cycle for example.In addition, in above-mentioned patent documentation 2 disclosed injection valves, though form the double-layer structure of vibration absorber and resin formation part,, be subjected to electricity to need higher intensity to improve the reliability of electrical connection section, normally form resin formation part by the synthetic resin that contains glass fibre with connector.And the glass fibre in the resin formation part is the material that transmits noise easily, although cover the part of electromagnet housing by the double-layer structure of vibration absorber and resin formation part, the inhibition effect of operational noise is very low.
Summary of the invention
The present invention finishes in view of the above problems, its purpose is to provide a kind of electro-magneto fuel injector, this electro-magneto fuel injector can be guaranteed the reliability of enough intensity with the acquisition electrical connection section, and can suppress the generation of operational noise effectively, and can compactness.
In order to achieve the above object, in accordance with a first feature of the invention, a kind of electro-magneto fuel injector is provided, this electro-magneto fuel injector has: the valve working part, it constitutes and contain valve body in valve chest, described valve chest has valve seat at front end, and described valve body is applied elastic force to the direction that falls to being positioned at described valve seat; Electromagnet portion, it constitutes and contain the coil assembly body in electromagnet housing, the setting of ining succession of described electromagnet housing and described valve chest, described coil assembling body can produce to the electromagnetic force of leaving the described valve body of described valve seat side drive, and the resin formation part made of synthetic resin, described resin formation part has integratedly and is subjected to electricity to use connector, and at least the envelope bury described electromagnet housing a part, the described electricity that is subjected to is subjected to electric side splicing ear with connector towards what the coil with described coil assembly body linked to each other, it is characterized in that, described resin formation part is made of the first ester moulding layer and the second ester moulding layer, the described first ester moulding layer covers the part of described electromagnet housing at least, and constitute at least a portion of described connector, this first ester moulding layer is formed by the synthetic resin of sneaking into glass fibre; The described second ester moulding layer covers the first ester moulding layer, and is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre.
In addition,, on the basis of above-mentioned first feature structure, provide a kind of electro-magneto fuel injector, it is characterized in that the first ester moulding layer is formed by the liquid-crystalline polymer of sneaking into glass fibre according to second feature of the present invention.
According to the 3rd feature of the present invention, a kind of electro-magneto fuel injector is provided, and this electro-magneto fuel injector has: the valve working part, and it constitutes and contain valve body in valve chest, described valve chest has valve seat at front end, and described valve body is applied elastic force to the direction that falls to being positioned at described valve seat; Electromagnet portion, it constitutes and contain the coil assembly body in electromagnet housing, the setting of ining succession of described electromagnet housing and described valve chest, described coil assembling body can produce to the electromagnetic force of leaving the described valve body of described valve seat side drive, and the resin formation part made of synthetic resin, described resin formation part has integratedly and is subjected to electricity to use connector, and at least the envelope bury described electromagnet housing a part, the described electricity that is subjected to is subjected to electric side splicing ear with connector towards what the coil with described coil assembly body linked to each other, it is characterized in that, described resin formation part is with the first ester moulding layer and the two-layer shaping of the second ester moulding layer and constitute, the described first ester moulding layer covers the part of described electromagnet housing at least, and constitute the connector major component, described connector major component constitutes the described skeleton that is subjected to electricity with connector, the described second ester moulding layer is formed by the material of flexural strength less than the first ester moulding layer, and cover the first ester moulding layer, and to forward end the first ester moulding layer is exposed with the intermediate portion of connector from the described electricity that is subjected to, on the described first ester moulding layer, with the intermediate portion of connector, be formed with described second ester moulding layer engaging at the described electricity that is subjected to, at least one is linked to be the engagement groove of ring-type.
According to the 4th feature of the present invention, on the basis of above-mentioned the 3rd feature structure, a kind of electro-magneto fuel injector is provided, it is characterized in that, on the second ester moulding layer, constituting the described part that is subjected to electricity with the part of connector, be formed with and the protuberance of power supply with the connector Elastic Contact, described power supply releasably is connected with connector with being subjected to electricity with connector, on the first ester moulding layer, constitute described be subjected to electricity with the part of the part of connector be formed with respect to described power supply with connector can in conjunction with the snap fit tabs that gets loose, it engages with connector with described power supply, and described engagement groove is clipped between itself and the described protuberance.
According to the 5th feature of the present invention, the above-mentioned the 3rd or the basis of the 4th feature structure on, a kind of electro-magneto fuel injector is provided, it is characterized in that the described first ester moulding layer is formed by the liquid-crystalline polymer of sneaking into glass fibre.
According to the 6th feature of the present invention, the above-mentioned the 3rd or the basis of the 4th feature structure on, a kind of electro-magneto fuel injector is provided, it is characterized in that the described second ester moulding layer is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre.
According to the 7th feature of the present invention, a kind of electro-magneto fuel injector is provided, and this electro-magneto fuel injector has: the valve working part, and it constitutes and contain valve body in valve chest, described valve chest has valve seat at front end, and described valve body is applied elastic force to the direction that falls to being positioned at described valve seat; Electromagnet portion, it constitutes and contain the coil assembly body in electromagnet housing, the setting of ining succession of described electromagnet housing and described valve chest, described coil assembling body can produce to the electromagnetic force of leaving the described valve body of described valve seat side drive, and the resin formation part made of synthetic resin, described resin formation part has integratedly and is subjected to electricity to use connector, and at least the envelope bury described electromagnet housing a part, the described electricity that is subjected to is subjected to electric side splicing ear with connector towards what the coil with described coil assembly body linked to each other, it is characterized in that, described resin formation part is with the first ester moulding layer and the two-layer shaping of the second ester moulding layer and constitute, the described first ester moulding layer covers the part of described electromagnet housing at least, and constitute a described part that is subjected to electricity with connector, the described second ester moulding layer covers the first ester moulding layer, and form by the material of linear expansion coeffcient greater than the first ester moulding layer, between described first ester moulding layer and the described second ester moulding layer, be formed with air layer partly.
According to the 8th feature of the present invention, on the basis of above-mentioned the 7th feature structure, provide a kind of electro-magneto fuel injector, it is characterized in that the described second ester moulding layer is by the heavy section that is positioned at central part; The thinner wall section that is positioned at end side that is thinner than heavy section with wall thickness and links to each other with heavy section constitutes, and thinner wall section is with the described first ester moulding layer or metal parts is concavo-convex engages.
According to the 9th feature of the present invention, on the basis of above-mentioned the 8th feature structure, a kind of electro-magneto fuel injector is provided, it is characterized in that, with the concavo-convex engagement portion that engages of described thinner wall section near, the outer surface of the described first ester moulding layer forms the surface more coarse than other parts.
According to the tenth feature of the present invention, on the basis of arbitrary structure of above-mentioned the 7th to the 9th feature, provide a kind of electro-magneto fuel injector, it is characterized in that the described first ester moulding layer is formed by the liquid-crystalline polymer that is mixed with glass fibre.
According to the 11 feature of the present invention, on the basis of arbitrary structure of above-mentioned the 7th to the 9th feature, provide a kind of electro-magneto fuel injector, it is characterized in that the described second ester moulding layer is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre.
In accordance with a first feature of the invention, the double-layer structure of resin formation part for constituting by the first ester moulding layer and the second ester moulding layer, the first ester moulding layer is formed by the synthetic resin that is mixed with glass fibre, therefore, by covering the coil of coil assembly body and the joint of splicing ear with the first ester moulding layer, and form at least a portion that is subjected to electricity to use connector by the first ester moulding layer, can make resin formation part have the intensity of the reliability that can guarantee electrical connection section, and, because covering the second ester moulding layer of the first ester moulding layer is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre, therefore, can utilize the good flexibility of thermoplastic rubber of polyester to suppress the generation of operational noise effectively.And, compare with the injection valve that covers Fuelinjection nozzle integral body with sound-insulating cover, can make the electro-magneto fuel injector overall compactization.
According to second feature of the present invention, liquid-crystalline polymer has the function that comparison can suppress the transmission of operational noise, and rigidity is also high, therefore, the intensity of the reliability that is used to guarantee electrical connection section can be further improved, and the generation of operational noise can be more effectively suppressed.
According to the 3rd feature of the present invention, the double-layer structure of resin formation part for constituting by the first ester moulding layer and the second ester moulding layer, the first ester moulding layer is formed by the bigger synthetic resin of flexural strength, therefore, by coil that covers the coil assembly body with the first ester moulding layer and the joint that is subjected to electric side splicing ear, and form the connector major component that constitutes the skeleton that is subjected to electricity usefulness connector by the first ester moulding layer, can make resin formation part have the intensity of the reliability that can guarantee electrical connection section, and, because covering the second ester moulding layer of the first ester moulding layer is formed by the lower synthetic resin of flexural strength, therefore, can suppress the generation of operational noise effectively, and, compare with the injection valve that covers Fuelinjection nozzle integral body with sound-insulating cover, can make the electro-magneto fuel injector overall compactization.And, because is two-layer shaping up to being subjected to electricity with the connector intermediate portion, so, utilize the first ester moulding layer can obtain to be subjected to the electricity needed intensity of connector, simultaneously, can suppress effectively from being subjected to electricity to produce operational noise by the second ester moulding layer with connector.In addition, at the intermediate portion that is subjected to electricity with connector, the second ester moulding layer engages with the engagement groove of the first ester moulding layer, therefore, can suppress the contraction of the second ester moulding layer after two-layer shaping finishes, can improve the adaptation between two-layer, quality of product is improved.
According to the 4th feature of the present invention, by making the protuberance and power supply connector Elastic Contact that is formed at the second lower ester moulding layer of flexural strength, can improve freedom from vibration, reduce resonance noise, be formed on the first higher ester moulding layer of flexural strength by making, can guarantee to bear the repeatedly enough durability of loading and unloading of power supply with connector with the snap fit tabs that engages with connector of powering.
According to the 5th feature of the present invention, the liquid-crystalline polymer of sneaking into glass fibre has the function that comparison can suppress the transmission of operational noise, and rigidity is also high, therefore, can further improve the intensity of the reliability that is used to guarantee electrical connection section, and, can more effectively suppress the generation of operational noise.
According to the 6th feature of the present invention, the thermoplastic rubber of polyester of not sneaking into glass fibre has excellent elasticity, thereby can suppress the generation of operational noise effectively.
According to the 7th feature of the present invention, the double-layer structure of resin formation part for constituting by the first ester moulding layer and the second ester moulding layer, and the first ester moulding layer is formed by the less synthetic resin of linear expansion coeffcient, therefore, by coil that covers the coil assembly body with the first ester moulding layer and the joint that is subjected to electric side splicing ear, and form at least a portion that is subjected to electricity to use connector by the first ester moulding layer, can make resin formation part have the intensity of the reliability that can guarantee electrical connection section, and, because covering the second ester moulding layer of the first ester moulding layer is formed by the bigger soft synthetic resin of linear expansion coeffcient, therefore, can suppress the generation of operational noise effectively by the flexibility of the second ester moulding layer, because the part is formed with air layer between first and second ester moulding layer, therefore, can further suppress the transmission of operational noise.And, compare with the injection valve that covers Fuelinjection nozzle integral body with sound-insulating cover, can make the electro-magneto fuel injector overall compactization.
According to the 8th feature of the present invention, by change the wall thickness of the second ester moulding layer according to the position, the contour projector when making the cooling after the firm shaping changes partly, thereby can automatically form air layer at the periphery of heavy section.Promptly, the rate of cooling of thinner wall section that is positioned at forward end is very fast, and because concavo-convex engaging; the adaptation of thinner wall section and the first ester moulding layer or metal parts improves; therefore; can suppress contour projector less; in addition, the rate of cooling of heavy section that is positioned at central part is slower, and contour projector is bigger; therefore; concavo-convexly engage by described the utilization, can suppress the contraction of the forward end of the second ester moulding layer, and the central part of the second ester moulding layer is cooled off lentamente; can make the central part contraction bigger, can form described air layer thus.
According to the 9th feature of the present invention, can improve the forward end of the second ester moulding layer and the adaptation of the first ester moulding layer, second contraction of ester moulding layer after two-layer shaping can be suppressed, thereby the raising of quality can be realized.
According to the tenth feature of the present invention, liquid-crystalline polymer has the function that comparison can suppress the transmission of operational noise, and rigidity is also high, therefore, the intensity of the reliability that is used to guarantee electrical connection section can be further improved, and the generation of operational noise can be more effectively suppressed.
According to the 11 feature of the present invention, the thermoplastic rubber of polyester of not sneaking into glass fibre has excellent elasticity, thereby can suppress the generation of operational noise effectively.
Description of drawings
Fig. 1 is the longitudinal sectional drawing of first embodiment's electro-magneto fuel injector.(first embodiment)
Fig. 2 is liquid-crystalline polymer and the flexural strength of thermoplastic rubber of polyester and the figure of the relation between the operational noise peak sound pressure that glass fibre is sneaked in expression.(first embodiment)
Fig. 3 is the sectional drawing along 3-3 lines among Fig. 1.(first embodiment)
Fig. 4 is the longitudinal sectional drawing of the electro-magneto fuel injector among second embodiment.(second embodiment)
Fig. 5 is the longitudinal sectional drawing of the electro-magneto fuel injector among the 3rd embodiment.(the 3rd embodiment).
Fig. 6 is the longitudinal sectional drawing of electro-magneto fuel injector.(the 4th embodiment)
Fig. 7 is liquid-crystalline polymer and the linear expansion coeffcient of thermoplastic rubber of polyester and the figure of the relation between the operational noise peak sound pressure that glass fibre is sneaked in expression.(the 4th embodiment)
Label declaration
5: the valve working part; 6: electromagnet portion; 7,37: resin formation part; 7a, 37a: the first ester moulding layer; 7b, 37b: the second ester moulding layer; 8: valve chest; 13: valve seat; 20: valve body; 24: the coil assembly body; 25: electromagnet housing; 30: coil; 37ba: heavy section; 37bb, 37bc, 37bd: thinner wall section; 38: be subjected to electric side splicing ear; 40: be subjected to the electricity connector; 40a: connector major component; 41,57,58: engagement groove; 44: air layer; 46: the power supply connector; 51: protuberance; 55: snap fit tabs.
Embodiment
Below, the embodiments of the invention shown in describe embodiments of the present invention with reference to the accompanying drawings.
Embodiment 1
Fig. 1 to Fig. 3 represents the first embodiment of the present invention.
At first in Fig. 1, be used for having: valve working part 5 to the electro-magneto fuel injector of not shown engine spray fuel, it constitutes and contain valve body 20 in valve chest 8, described valve chest 8 has valve seat 13 at front end, and described valve body 20 is applied elastic force to the direction that falls to being positioned at described valve seat 13; Electromagnet portion 6, it constitutes and contain coil assembly body 24 in electromagnet housing 25, the setting of ining succession of described electromagnet housing 25 and described valve chest 8, described coil assembly body 24 can produce the electromagnetic force that drives described valve body 20 to the direction of leaving described valve seat 13; And the resin formation part 7 made of synthetic resin, it has integratedly and is subjected to electricity with connector 40, and envelope is buried described coil assembly body 24 and described electromagnet housing 25 at least, wherein, described be subjected to the electricity with connector 40 towards the electric side splicing ear 38 that is subjected to that links to each other with the coil 30 of described coil assembly body 24 ...
The chimeric slidably movable core 18 that a part that constitutes electromagnet portion 6 is arranged in rear portion in valve chest 8, front end at the valve shaft 19 that is connected as a single entity with this movable core 18, formed valve body 20, this valve body 20 can fall to being positioned to make on the described valve seat 13 12 sealings of fuel outlet hole.In movable core 18, valve shaft 19 and valve body 20, be formed with coaxially with valve chest 8 in the through hole 21 that is communicated with, what this through hole 21 formed the front end sealing has an end shape.
The rear end of the magnetic cylindrical body 9 in the valve chest 8 is bonded on the front end of described secured core 22 coaxially by the non-magnetic cylinder body 26 that is formed by nonmagnetic metal such as stainless steels, the rear end butt welding of magnetic cylindrical body 9 is connected on the front end of non-magnetic cylinder body 26, the rear end of non-magnetic cylinder body 26 so that the state that the front end of secured core 22 is entrenched in the non-magnetic cylinder body 26 be welded on the secured core 22.
Chimeric in secured core 22 have a retainer 27 cylindraceous, and this retainer 27 is fixed by ca(u)lk, and described returning spring 23 is installed between retainer 27 and the movable core 18.And, all chimeric stop members 28 that is fixed with the ring-type that constitutes by nonmagnetic substance in the rearward end of movable core 18, this stop member 28 is outstanding slightly to secured core 22 sides from the ear end face of movable core 18, directly contacts with secured core 22 to avoid movable core 18.In addition, coil assembly body 24 constitutes by coiling coil 30 on the bobbin 29 of the rear portion, non-magnetic cylinder body 26 and the secured core 22 that center on valve chest 8.
In the rear end of secured core 22, one and ining succession coaxially is provided with inlet tube 33 cylindraceous, at the rear portion of this inlet tins 33 fuel filter 34 is installed.And, on inlet tube 33, retainer 27 and secured core 22, be provided with the fuel channel 35 that is communicated with the through hole 21 of movable core 18 coaxially.
On described resin formation part 7, be provided with integratedly and be subjected to electricity connector 40, this is had towards being subjected to electricity side splicing ear 38 with connector 40 by electricity ... barrel 39, the described electricity side splicing ear 38 that is subjected to ... link to each other with the two ends of coil 30 in the described coil assembly body 24, describedly be subjected to electric side splicing ear 38 ... cardinal extremity be embedded among the described arm 29a line end 30a of described coil 30 ... be welded on and be subjected to electric side splicing ear 38 ... on.
In addition, resin formation part 7 is by the first ester moulding layer 7a and the second two-layer shaping of ester moulding layer 7b and constitute, the described first ester moulding layer 7a covers the part of electromagnet housing 25 at least, and constitute connector major component 40a, described connector major component 40a constitutes the described skeleton that is subjected to electricity with connector 40; The described second ester moulding layer 7b covers the first ester moulding layer 7a, and, be subjected to the electric intermediate portion of connector 40 of using to forward end from described, the first ester moulding layer 7a exposed, in this embodiment, the part of the rear portion of the integral body of electromagnet housing 25, valve chest 8 and inlet tube 33 is covered by the first ester moulding layer 7a, and, formed by the first ester moulding layer 7a with the connector major component 40a of connector 40 by electricity.
And, the first ester moulding layer 7a formed by the bigger material of flexural strength, relative therewith, the second ester moulding layer 7b formed by the material of flexural strength less than the first ester moulding layer 7a, the first ester moulding layer 7a for example formed by the liquid-crystalline polymer of sneaking into glass fibre, the second ester moulding layer 7b is by the thermoplastic rubber of polyester of not sneaking into glass fibre, and for example the material of commodity Ha イ ト レ Le (du pont company) by name forms.
Forming under the situation of resin formation part 7 integral body with the liquid-crystalline polymer of for example sneaking into 35% glass fibre, flexural strength, with the relation of the operational noise peak sound pressure that produces from resin formation part 7 shown in the some A Fig. 2, liquid-crystalline polymer has the function that comparison can suppress the transmission of operational noise, and rigidity is also high.Relative therewith, forming with the thermoplastic rubber of polyester of not sneaking into glass fibre under the situation of resin formation part 7 integral body, utilize the good flexibility of thermoplastic rubber of polyester, can suppress the generation of operational noise effectively, shown in the some B among Fig. 2, though flexural strength is lower than liquid-crystalline polymer, can suppress the operational noise peak sound pressure lower.
In addition, be subjected to the electric intermediate portion of connector 40 of using to forward end from described, the first ester moulding layer 7a do not covered by the second ester moulding layer 7b, but be exposed to the outside, in addition, in the part corresponding with the rear portion of valve chest 8, the part of the first ester moulding layer 7a is not covered by the second ester moulding layer 7b, but be exposed to the outside, on the first ester moulding layer 7a, with the described first and second ester moulding layer 7a that are subjected to electricity with the corresponding part in the rear portion of the intermediate portion of connector 40 and valve chest 8, the boundary portion of 7b, at least be formed with the engagement groove that is linked to be ring-type 41 that (being in the present embodiment) engages with the second ester moulding layer 7b respectively, 42, this engagement groove 41,42 cross section shape for example is U word shape roughly.
With reference to Fig. 3, be subjected to electricity with on the connector 40 simultaneously, can releasably be connected with the power supply connector 46 that synthetic resin is made, this power supply has the recess 45 that is used to make described barrel 39 insertions with connector 46.This power supply has with connector 46 can be inserted into the described electricity that is subjected to the insertion part 47 in the barrel 39 of connector 40, be arranged on the insertion part 47, be used to make the described electric side splicing ear 38 that is subjected to ... the a pair of attachment hole 48 that inserts ... in, be equipped with respectively and can be subjected to electric side splicing ear 38 with described ... the supply side splicing ear 49 that is electrically connected ..., with supply side splicing ear 49 ... the lead 50 that links to each other stretches out with connector 46 from power supply.
And, at a plurality of positions that are subjected to electricity with the outer surface of the described barrel 39 in the connector 40, the outstanding protuberance 51 that is provided with the internal surface Elastic Contact of described recess 45 ... in this embodiment, at the outer surface of barrel 39, outstanding be provided with three protuberances 51 with the internal surface Elastic Contact of recess 45 ..., on the second ester moulding layer 7b, be subjected to the part of electricity in formation, form these protuberances 51 with the part of connector 40 ...
In addition, the part of the sidewall of described barrel 39 is made of the flat wall 39a of portion, on the 39a of this wall portion, in succession integratedly and be provided with from barrel 39 to the outstanding a pair of guide wall 52,52 in side, described a pair of guide wall 52,52 links to each other on same, use on the connector 46 in power supply, be provided with a pair of guiding recess 53,53 at the internal surface opening of the recess 45 that described barrel 39 is inserted, it can plug the chimeric described guide wall 52,52 in ground, these guide wall 52 ... also be formed on the first ester moulding layer 7a.
In addition, in the sidewall of described barrel 39, the outstanding snap fit tabs 55 that is provided with on the outer surface of the sidewall of described electromagnet housing 25 sides, described snap fit tabs 55 be located at described power supply with on the connector 46 engage pawl 54 can in conjunction with and engage with getting loose, and described engagement groove 41 is clipped in itself and described protuberance 51 ... between, on the first ester moulding layer 7a, be subjected to the part of electricity in formation with the part of connector 40, form described snap fit tabs 55.
Next, effect to first embodiment describes, resin formation part 7 is by the first ester moulding layer 7a and the second two-layer shaping of ester moulding layer 7b and constitute, the described first ester moulding layer 7a covers the part of electromagnet housing 25 at least, and constitute connector major component 40a, described connector major component 40a constitutes the skeleton that is subjected to electricity to use connector 40, the described second ester moulding layer 7b formed by the material of flexural strength less than the first ester moulding layer 7a, and, cover the first ester moulding layer 7a, and, from being subjected to the electric intermediate portion of using connector 40, the first ester moulding layer 7a exposed to forward end.
So, coil 30 by covering coil assembly body 24 by the first ester moulding layer 7a be subjected to electric side splicing ear 38 ... joint, and, form the connector major component 40a that constitutes the skeleton that is subjected to electricity usefulness connector 40 by the first ester moulding layer 7a, can make resin formation part 7 have the intensity of the reliability that can guarantee electrical connection section.In addition, by the second ester moulding layer 7b that covers the first ester moulding layer 7a formed by the lower synthetic resin of flexural strength, can suppress the generation of operational noise effectively, in addition, compare with the injection valve that covers Fuelinjection nozzle integral body with sound-insulating cover, can make the electro-magneto fuel injector overall compactization.And, to be subjected to electricity be two-layer shaping with connector 40 until the intermediate portion by making, utilize the first ester moulding layer 7a can obtain to be subjected to electricity, simultaneously, utilize the second ester moulding layer 7b can reduce effectively from being subjected to electricity to produce operational noise with connector 40 with connector 40 needed intensity.
And, the first ester moulding layer 7a formed by the liquid-crystalline polymer of sneaking into glass fibre, the liquid-crystalline polymer of sneaking into glass fibre has the function that comparison can suppress the transmission of operational noise, and rigidity is also high, therefore, the intensity of the reliability that is used to guarantee electrical connection section can be further improved, and the generation of operational noise can be more effectively suppressed.
In addition, the second resin formation part 7b is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre, and the thermoplastic rubber of polyester of not sneaking into glass fibre has excellent elasticity, therefore, can suppress the generation of operational noise effectively.
In addition, on the first ester moulding layer 7a, be formed with the engagement groove that is linked to be ring-type 41 of the engaging second ester moulding layer 7b at the intermediate portion that is subjected to electricity with connector 40, therefore, can suppress the contraction of the second ester moulding layer 7b after two-layer shaping finishes, can improve two-layer adaptation, quality of product is improved.Especially, in the present embodiment, on the first ester moulding layer 7a,, also be formed with the engagement groove 42 of the ring-type of the engaging second ester moulding layer 7b, therefore can further improve the quality of products even in part corresponding to the rear portion of valve chest 8.
Had towards being subjected to electric side splicing ear 38 with connector 40 by electricity ... barrel 39, be subjected to electricity releasably to be connected with the power supply usefulness connector 46 of the recess 45 that has inserted barrel 39 on connector 40 at this, can be subjected to electric side splicing ear 38 ... the supply side splicing ear 49 that is electrically connected ... be located at power supply with on the connector 46, and at a plurality of positions of the outer surface of barrel 39, the outstanding protuberance 51 that is provided with the internal surface Elastic Contact of recess 45 ...
So, described barrel 39 can be in recess 45 internal vibrations, can suppress to be subjected to electricity to use the vibration of connector 46 with connector 40 and power supply, thereby can suppress the generation of operational noise, and do not need to be used to suppress the special parts that operational noise produces, the increase of number of components can be avoided, the reduction of cost can be realized.
And, described protuberance 51 ... be subjected to the part of electricity in formation, be formed on the second ester moulding layer 7b, therefore can further improve freedom from vibration, can further reduce resonance noise with the part of connector 40.
In addition, on the flat barrel 39a of the part of the sidewall that constitutes barrel 39, in succession integratedly and be provided with from barrel 39 to the outstanding a pair of guide wall 52 in side, 52, and described a pair of guide wall 52,52 link to each other on same with the described wall 39a of portion, use on the connector 46 in power supply, be provided with a pair of guiding recess 53 at the internal surface opening of the recess 45 that described barrel 39 is inserted, 53, and make and to plug the chimeric described guide wall 52 in ground, 52, therefore, can be used in the simple shapeization of guiding barrel 39 in recess 45, be subjected to electricity connector 40 and the simple shapeization of power supply thereby can be used in is shaped, thereby help to reduce manufacture cost with the mould of connector 46.
In addition, in the sidewall of barrel 39, on the outer surface of the sidewall of electromagnet housing 25 sides, outstanding be provided with described power supply with connector 46 engage pawl 45 can in conjunction with and the snap fit tabs 55 that engages with getting loose, therefore, can suppress to power leans out with the lateral direction of connector 46 to electro-magneto fuel injector, particularly to the automatic two-wheeled cycle that is applied to take the dress limited space etc. effectively.In addition; do not need to be used to protect power supply to be subjected to the protective bulkhead of electricity, can further simplify the shape of power supply, can be used in the simple shapeization of power supply that be shaped with the mould of connector 46 with connector 46 with the engagement portion of connector 40 with 46 pairs of connectors; thus, can further reduce manufacture cost.
And, on the first resin formation part 7a, constituting the described part that is subjected to electricity with the part of connector 40, form snap fit tabs 55, and will be located at and be subjected to electricity to be clipped in itself and described protuberance 51 with the engagement groove 41 of the intermediate portion of connector 40 ... between, therefore, be formed on the first higher ester moulding layer 7a of bending strength ratio, can guarantee to bear enough durability of loading and unloading repeatedly of power supply with connector 46 by making with the snap fit tabs 55 that engages with connector 46 of powering.
Embodiment 2
As the second embodiment of the present invention, as shown in Figure 4, also can on the first ester moulding layer 7a, be subjected to electricity to be linked to be the engagement groove 57 of ring-type with the intermediate portion setting of connector 40, its shape of cross section is made roughly V font, and engage with the second ester moulding layer 7b.
As the third embodiment of the present invention, as shown in Figure 5, also can be on the first ester moulding layer 7a, be subjected to electricity to be linked to be the engagement groove 58 of ring-type with the intermediate portion setting of connector 40, it is wedge shape and engages with the second ester moulding layer 7b.
In addition, as other embodiments of the invention, implement to make shaggy processing on the outer surface of the part that covers by the second ester moulding layer 7b that also can be in the first ester moulding layer 7a, perhaps form the concavo-convex of bellows-shaped, to improve the adaptation between the first and second ester moulding layer 7a, the 7b at described outer surface.
Embodiment 4
Fig. 6 and Fig. 7 represent the fourth embodiment of the present invention, for the corresponding part of above-mentioned first to the 3rd embodiment, be marked with identically with reference to label, and only make diagram and omit detailed explanation.
At first, in Fig. 6, the resin formation part 37 that synthetic resin is made has integratedly and is subjected to electricity with connector 40, and envelope is sunken cord and is enclosed assembly body 24 and electromagnet housing 25 at least, wherein said be subjected to the electricity with connector 40 towards the electric side splicing ear 38 that is subjected to that links to each other with the coil 30 of coil assembly body 24 ... this resin formation part 37 forms: not only envelope is buried electromagnet housing 25 and coil assembly body 24, and in the gap of filling up between electromagnet housing 25 and the coil assembly body 24, also envelope is buried the part of valve chest 8 and the major part of inlet tube 33, the magnetic frame 31 of electromagnet housing 25 is provided with and is used to make arm 29a to be configured in electromagnet housing 25 notch 36 outward, and described arm 29a is integrally formed on the bobbin 29 of coil assembly body 24.
On described resin formation part 37, be provided with integratedly and be subjected to electricity connector 40, described be subjected to electricity with connector 40 towards the electric side splicing ear 38 that is subjected to that links to each other with the two ends of coil 30 in the described coil assembly body 24 ... the described cardinal extremity of electric side splicing ear 38 that is subjected to is embedded among the described arm 29a coil-end 30a of described coil 30 ... be welded on and be subjected to electric side splicing ear 38 ... on.
In addition, resin formation part 37 is made of the first ester moulding layer 37a and the second ester moulding layer 37b, the described first ester moulding layer 37a covers the part of electromagnet housing 25 at least, and constitute a described part that is subjected to electricity with connector 40, the described second ester moulding layer 37b covers the first ester moulding layer 37a, in the 4th embodiment, the part of the rear portion of the integral body of electromagnet housing 25, valve chest 8 and inlet tube 33 is covered by the first ester moulding layer 37a, and, formed by the first ester moulding layer 37a with the part of connector 40 by electricity.
And, the liquid-crystalline polymer that the first ester moulding layer 37a for example sneaks into glass fibre by the bigger material of flexural strength forms, relative therewith, the second ester moulding layer 37b for example do not sneak into the thermoplastic rubber of polyester of glass fibre by flexural strength less than the material of the first ester moulding layer 37a, and for example the material of commodity Ha イ ト レ Le (du pont company) by name forms.
In addition, form under the situation of resin formation part 37 integral body by the liquid-crystalline polymer of for example sneaking into 35% glass fibre, flexural strength, with the relation of the operational noise peak sound pressure that produces from resin formation part 37 shown in the some A Fig. 7, liquid-crystalline polymer has the function that comparison can suppress the transmission of operational noise, and rigidity is also high.Relative therewith, constituting by the thermoplastic rubber of polyester of not sneaking into glass fibre under the situation of resin formation part 37 integral body, utilize the good flexibility of thermoplastic rubber of polyester, can suppress the generation of operational noise effectively, shown in the some B among Fig. 7, though flexural strength is less than liquid-crystalline polymer, it can suppress the operational noise peak sound pressure lower.
In addition, the second ester moulding layer 37b is by the heavy section 37ba that is positioned at its central part; Be thinner than heavy section 37ba and the thinner wall section 37bb that is positioned at end side, the 37bc that link to each other with heavy section 37a with wall thickness, 37bd constitutes, thinner wall section 37bb～37bd and the first ester moulding layer 37a or engage as the inlet tube 33 of metal parts is concavo-convex.
Promptly, use the intermediate portion of connector 40 to forward end from being subjected to electricity, the first ester moulding layer 37a covered by the second ester moulding layer 37b, but is exposed to the outside, in addition, the rear portion of inlet tube 33 is not to be covered by the second ester moulding layer 37b, but be exposed to the outside, and, in the part corresponding with the rear portion of valve chest 8, the part of the first ester moulding layer 37a is not to be covered by the second ester moulding layer 37b, but is exposed to the outside.Like this, on corresponding to the first ester moulding layer 37a that is subjected to electricity with the part at the rear portion of the intermediate portion of connector 40 and valve chest 8, be formed with the engagement groove 41,42 of the ring-type that engages with the end of thinner wall section 37bb, the 37bd of the second ester moulding layer 37b, at the outstanding engaging protuberance 43 that engages with the internal surface of thinner wall section 37bc among the second ester moulding layer 37b that is provided with of the intermediate portion periphery of inlet tube 33.And, with the concavo-convex engagement portion that engages of thinner wall section 37bb, 37bd near, formation or the concavo-convex shaping of bellows-shaped etc. of the outer surface of the first ester moulding layer 37a by coarse patterns forms the coarse surface of surface ratio other parts.
Next, effect to the 4th embodiment describes, resin formation part 37 is by the first ester moulding layer 37a and the second two-layer shaping of ester moulding layer 37b and constitute, the described first ester moulding layer 37a covers the part of electromagnet housing 25 at least, and constitute and be subjected to the part of electricity with connector 40, the described second ester moulding layer 37b covers the first ester moulding layer 37a, and formed by the material of linear expansion coeffcient greater than the first ester moulding layer 37a.
So, coil 30 by covering coil assembly body 24 with the first ester moulding layer 37a be subjected to electric side splicing ear 38 ... joint, and form the major component that is subjected to electricity to use connector 40 by the first ester moulding layer 37a, can make resin formation part 37 have the intensity of the reliability that can guarantee electrical connection section.In addition, the second ester moulding layer 37b that covers the first ester moulding layer 37a formed by the bigger synthetic resin of linear expansion coeffcient, thus, can suppress the generation of operational noise effectively, owing between the first and second ester moulding layer 37a, 37b, be formed with air layer 44 partly, therefore, can further suppress the transmission of operational noise.In addition, compare, can make the electro-magneto fuel injector overall compactization with the injection valve that covers Fuelinjection nozzle integral body with sound-insulating cover.
And, the first ester moulding layer 37a formed by the liquid-crystalline polymer of sneaking into glass fibre, the liquid-crystalline polymer of sneaking into glass fibre has the function that comparison can suppress the transmission of operational noise, and rigidity is also high, therefore, the intensity of the reliability that is used to guarantee electrical connection section can be further improved, and the generation of operational noise can be further suppressed effectively.
In addition, the second resin formation part 37b is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre, and the thermoplastic rubber of polyester of not sneaking into glass fibre has excellent elasticity, therefore can suppress the generation of operational noise effectively.
In addition, the second ester moulding layer 37b is by the heavy section 37ba that is positioned at its central part; Be thinner than heavy section 37ba with wall thickness, and the thinner wall section 37bb that is positioned at end side that links to each other with heavy section 37ba, 37bc, 37bd constitutes; thinner wall section 37bb; 37bd be subjected to electricity with the intermediate portion of connector 40 and the corresponding part in rear portion of valve chest 8; with first ester moulding layer 37a is concavo-convex engages; thinner wall section 37bc is concavo-convex be sticked in the intermediate portion of secured core 22 for the inlet tube 33 of one on; therefore; by change the wall thickness of the second ester moulding layer 37b according to the position; the contour projector when making the cooling after the firm shaping changes partly, thereby can be automatically form air layer 44 at the periphery of heavy section 37ba.
Promptly, the rate of cooling of the thinner wall section 37bb of end side～37bd is than very fast, and, because concavo-convex engaging, its adaptation to the first ester moulding layer 37a or inlet tube 33 improves, therefore, can suppress contour projector smaller, in addition, the rate of cooling of the heavy section 37ba of central part is slow, contour projector is bigger, therefore, and the contraction of the end side by the incompatible inhibition second ester moulding layer 37b of described embossed card, and the central part of the second ester moulding layer 37b is cooled off lentamente, it is bigger that central part is shunk, and thus, described air layer 44 can be formed at the periphery of heavy section 37ba.
And, with the concavo-convex engagement portion that engages of thinner wall section 37bc, 37bd near, the outer surface of the first ester moulding layer 37a forms the surface more coarse than other parts, therefore, can improve the adaptation of the end side and the first ester moulding layer 37a of the second ester moulding layer 37b, the contraction of the second ester moulding layer 37b after the two-layer shaping can be suppressed, the raising of quality can be realized.
More than, embodiments of the invention are illustrated, but the present invention is not limited to the foregoing description, in the scope that does not break away from claims of the present invention, can carry out various design alterations.
Claims (8)
1. electro-magneto fuel injector, this electro-magneto fuel injector has: valve working part (5), it constitutes and contain valve body (20) in valve chest (8), described valve chest (8) has valve seat (13) at front end, and described valve body (20) is applied elastic force to the direction that falls to being positioned at described valve seat (13); Electromagnet portion (6), it constitutes and contain coil assembly body (24) in electromagnet housing (25), the setting of ining succession of described electromagnet housing (25) and described valve chest (8), described coil assembly body (24) can produce to the electromagnetic force of leaving the described valve body of described valve seat (13) side drive (20); And the resin formation part (7) made of synthetic resin, described resin formation part (7) has integratedly and is subjected to electricity with connector (40), and envelope is buried the part of described electromagnet housing (25) at least, the described electricity that is subjected to is subjected to electric side splicing ear (38) with connector (40) towards what link to each other with the coil (30) of described coil assembly body (24), it is characterized in that
Described resin formation part (7) is with the first ester moulding layer (7a) and the second two-layer shaping of ester moulding layer (7b) and constitute, the described first ester moulding layer (7a) covers the part of described electromagnet housing (25) at least, and constitute connector major component (40a), described connector major component (40a) constitutes the described skeleton that is subjected to electricity with connector (40), the described second ester moulding layer (7b) is formed by the material of flexural strength less than the first ester moulding layer (7a), and cover the first ester moulding layer (7a), and to forward end the first ester moulding layer (7a) is exposed with the intermediate portion of connector (40) from the described electricity that is subjected to, on the described first ester moulding layer (7a), at the described intermediate portion that is subjected to electricity with connector (40), be formed with and be used for engaging with the described second ester moulding layer (7b), at least one is linked to be the engagement groove (41 of ring-type, 57,58).
2. electro-magneto fuel injector according to claim 1 is characterized in that,
On the second ester moulding layer (7b), constituting the described part that is subjected to electricity with the part of connector (40), be formed with and the protuberance (51) of power supply with connector (46) Elastic Contact, described power supply releasably is connected with connector (40) with being subjected to electricity with connector (46), on the first ester moulding layer (7a), constitute described be subjected to electricity with the part of the part of connector (40) be formed with respect to described power supply with connector (46) can in conjunction with the snap fit tabs (55) that gets loose, it engages with connector (46) with described power supply, and with described engagement groove (41,57,58) be clipped between itself and the described protuberance (51).
3. electro-magneto fuel injector according to claim 1 and 2 is characterized in that,
The described first ester moulding layer (7a) is formed by the liquid-crystalline polymer of sneaking into glass fibre.
4. electro-magneto fuel injector according to claim 1 and 2 is characterized in that,
The described second ester moulding layer (7b) is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre.
5. electro-magneto fuel injector, this electro-magneto fuel injector has: valve working part (5), it constitutes and contain valve body (20) in valve chest (8), described valve chest (8) has valve seat (13) at front end, and described valve body (20) is applied elastic force to the direction that falls to being positioned at described valve seat (13); Electromagnet portion (6), it constitutes and contain coil assembly body (24) in electromagnet housing (25), the setting of ining succession of described electromagnet housing (25) and described valve chest (8), described coil assembly body (24) can produce to the electromagnetic force of leaving the described valve body of described valve seat (13) side drive (20); And the resin formation part (37) made of synthetic resin, described resin formation part (37) has integratedly and is subjected to electricity with connector (40), and envelope is buried the part of described electromagnet housing (25) at least, the described electricity that is subjected to is subjected to electric side splicing ear (38) with connector (40) towards what link to each other with the coil (30) of described coil assembly body (24), it is characterized in that
Described resin formation part (37) is with the first ester moulding layer (37a) and the second two-layer shaping of ester moulding layer (37b) and constitute, the described first ester moulding layer (37a) covers the part of described electromagnet housing (25) at least, and constitute a described part that is subjected to electricity with connector (40), the described second ester moulding layer (37b) covers the first ester moulding layer (37a), and form by the material of linear expansion coeffcient greater than the first ester moulding layer (37a), the described second ester moulding layer (37b) is by the heavy section that is positioned at central part (37ba), be thinner than heavy section (37ba) with wall thickness, and the thinner wall section (37bb that is positioned at end side that links to each other with heavy section (37ba), 37bc, 37bd) constitute; (37bb～37bd) is with the described first ester moulding layer (37a) or metal parts (33) is concavo-convex engages; by this concavo-convex engaging, be formed with air layer (44) partly between described first ester moulding layer (37a) and the described second ester moulding layer (37b) for thinner wall section.
6. electro-magneto fuel injector according to claim 5 is characterized in that,
With the concavo-convex engagement portion that engages of described thinner wall section (37bb, 37bd) near, the outer surface of the described first ester moulding layer (37a) forms the surface more coarse than other parts.
7. according to claim 5 or 6 described electro-magneto fuel injectors, it is characterized in that,
The described first ester moulding layer (37a) is formed by the liquid-crystalline polymer of sneaking into glass fibre.
8. according to claim 5 or 6 described electro-magneto fuel injectors, it is characterized in that,
The described second ester moulding layer (37b) is formed by the thermoplastic rubber of polyester of not sneaking into glass fibre.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP053691/2004 | 2004-02-27 | ||
| JP2004053691A JP2005240731A (en) | 2004-02-27 | 2004-02-27 | Solenoid-operated fuel injection valve |
| JP065985/2004 | 2004-03-09 | ||
| JP065984/2004 | 2004-03-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1926324A CN1926324A (en) | 2007-03-07 |
| CN100504060C true CN100504060C (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800061466A Active CN100504060C (en) | 2004-02-27 | 2005-02-25 | Electromagnetic fuel injection valve |
Country Status (2)
| Country | Link |
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| JP (1) | JP2005240731A (en) |
| CN (1) | CN100504060C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949344A (en) * | 2010-09-10 | 2011-01-19 | 冯政杰 | Electromagnetic fuel injection valve |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007285283A (en) * | 2006-04-20 | 2007-11-01 | Denso Corp | Fuel injection valve |
| JP4866336B2 (en) * | 2007-11-28 | 2012-02-01 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
| DE102008003821A1 (en) * | 2008-01-10 | 2009-07-16 | Epcos Ag | Piezoelectric actuator unit |
| JP4897728B2 (en) | 2008-03-18 | 2012-03-14 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
| JP5072745B2 (en) * | 2008-07-07 | 2012-11-14 | 株式会社ケーヒン | Electromagnetic fuel injection valve and manufacturing method thereof |
| DE102011006824A1 (en) * | 2011-04-06 | 2012-10-11 | Robert Bosch Gmbh | Valve for metering a medium |
| JP6510939B2 (en) * | 2015-09-16 | 2019-05-08 | 日立オートモティブシステムズ株式会社 | Fuel injection valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1640742A (en) * | 1924-05-21 | 1927-08-30 | Gen Motors Res Corp | Pump |
| US4833352A (en) * | 1987-06-20 | 1989-05-23 | Lucas Industries Public Limited Company | Linear inductive transducer |
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2004
- 2004-02-27 JP JP2004053691A patent/JP2005240731A/en active Pending
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2005
- 2005-02-25 CN CNB2005800061466A patent/CN100504060C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1640742A (en) * | 1924-05-21 | 1927-08-30 | Gen Motors Res Corp | Pump |
| US4833352A (en) * | 1987-06-20 | 1989-05-23 | Lucas Industries Public Limited Company | Linear inductive transducer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949344A (en) * | 2010-09-10 | 2011-01-19 | 冯政杰 | Electromagnetic fuel injection valve |
| CN101949344B (en) * | 2010-09-10 | 2012-07-04 | 浙江冯仕特电喷技术有限公司 | Electromagnetic fuel injection valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1926324A (en) | 2007-03-07 |
| JP2005240731A (en) | 2005-09-08 |
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