WO2005083259A1 - 電磁式燃料噴射弁 - Google Patents
電磁式燃料噴射弁 Download PDFInfo
- Publication number
- WO2005083259A1 WO2005083259A1 PCT/JP2005/003126 JP2005003126W WO2005083259A1 WO 2005083259 A1 WO2005083259 A1 WO 2005083259A1 JP 2005003126 W JP2005003126 W JP 2005003126W WO 2005083259 A1 WO2005083259 A1 WO 2005083259A1
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- WO
- WIPO (PCT)
- Prior art keywords
- resin molding
- molding layer
- valve
- layer
- bra
- Prior art date
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/166—Selection of particular materials
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/09—Fuel-injection apparatus having means for reducing noise
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9023—Fibrous materials
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/903—Glass
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9046—Multi-layered materials
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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
- F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
Definitions
- the present invention relates to an electromagnetic fuel injection valve, and in particular, a valve actuating section in which a valve body which is biased in a direction to be seated on the valve seat is accommodated in a valve housing having a valve seat at a front end, A solenoid assembly housed in a solenoid, a coil assembly that is capable of exerting an electromagnetic force for driving the valve body on the side separated from the valve seat, and is housed in a housing; and the coil assembly.
- the present invention relates to an electromagnetic fuel injection valve comprising: a power receiving bra that integrally faces a connection terminal connected to the coil; and a synthetic resin resin molded part that at least partially embeds the solenoid housing.
- Patent Document 1 Japanese Patent Application Laid-Open No. 62-195452
- Patent Document 2 Japanese Unexamined Patent Publication No. 63-41658
- Patent Document 1 As disclosed in Patent Document 1, when the entire fuel injection valve is covered with a soundproof cover, this leads to an increase in the size of the fuel injection valve as a whole. It is difficult to apply when space is limited. Further, the structure disclosed in Patent Document 2 has a two-layer structure including a vibration isolator and a resin molding portion.
- the power receiving bra has a relatively high strength in order to improve the reliability of the electrical connection portion. It is necessary to keep the height higher, and the resin molded portion is generally formed of a synthetic resin containing glass fiber. The glass fiber in the resin molding part is easy to transmit sound, and despite the fact that it covers a part of the solenoid housing with the two-layer structure of the vibration isolator and the resin molding part, Work The effect of suppressing dynamic sounds is low.
- the present invention has been made in view of the above circumstances, and effectively suppresses the generation of operation noise while securing sufficient strength to obtain the reliability of the electrical connection, and also reduces the force. It is an object of the present invention to provide an electromagnetic fuel injection valve that enables compact dangling.
- a valve body which is spring-biased in a direction to be seated on the valve seat is housed in a valve housing having a valve seat at a front end.
- the resin molding portion covers at least a part of the solenoid housing and constitutes at least a part of the power receiving power bra by a synthetic resin mixed with glass fiber.
- a characteristic electromagnetic fuel injection valve is proposed.
- the first resin molding layer is formed of a liquid crystal polymer mixed with glass fibers.
- An electromagnetic fuel injection valve is proposed.
- a valve actuating section in which a valve element spring-biased in a direction to be seated on the valve seat is housed in a valve housing having a valve seat at a front end, and the valve A solenoid assembly accommodated in a solenoid and a housing provided with a coil assembly capable of exerting an electromagnetic force for driving the valve body on the side to be separated from the seat, and a coil of the coil assembly
- An electromagnetic fuel injection valve comprising: a power receiving bra that integrally faces a power-receiving-side connection terminal connected to the resin housing; and a synthetic resin resin molded part that embeds at least a part of the solenoid housing.
- the resin molding portion covers at least a part of the solenoid housing and forms a main body of a power bra that forms a skeleton of the power receiving power bra.
- the first resin molding layer is made of a material having a smaller bending strength than the first resin molding layer, and the first resin molding layer is exposed from the middle to the front end side of the power receiving fogger.
- a second resin molding layer covering the resin molding layer is formed by two layers, and the second resin molding layer is engaged with the first resin molding layer at an intermediate portion of the power receiving power bra.
- An electromagnetic fuel injection valve is characterized in that at least one endless engagement groove is formed.
- the protrusion that elastically comes into contact with the power supply power bra that is detachably connected to the power reception power bra is provided.
- An engaging projection formed on the second resin molding layer at a portion constituting a part of the power bra, and releasably engaging with the power feeding power bra, has the engaging groove interposed between the projection and the projection.
- An electromagnetic fuel injection valve is proposed in which a portion constituting a part of the power-receiving power brass so as to be sandwiched therebetween is formed in a first resin molding layer.
- the first resin molded layer is formed of a liquid crystal polymer mixed with glass fibers.
- a characteristic electromagnetic fuel injection valve is proposed.
- the second resin molding layer is formed of a thermoplastic polyester elastomer from which glass fiber is not mixed.
- An electromagnetic fuel injection valve is proposed.
- a valve operating section in which a valve body that is spring-biased in a direction to be seated on the valve seat is housed in a valve housing having a valve seat at a front end, and the valve A solenoid assembly accommodated in a solenoid and a housing provided with a coil assembly capable of exerting an electromagnetic force for driving the valve body on the side to be separated from the seat, and a coil of the coil assembly
- An electromagnetic fuel injection valve comprising: a power receiving bra that integrally faces a power-receiving-side connection terminal connected to the resin housing; and a synthetic resin resin molded part that embeds at least a part of the solenoid housing.
- the resin molding portion is formed of a first resin molding layer that covers at least a part of the solenoid housing and also constitutes a part of the power receiving power bra, and a material having a larger linear expansion coefficient than the first resin molding layer. Been the first And a second resin molding layer covering the resin molding layer is formed by two-layer molding, and an air layer is partially formed between the first and second resin molding layers.
- a valve is proposed.
- the second resin molded layer has a thick portion at the center thereof and a thinner portion than the thick portion.
- An electromagnetic fuel injection valve is proposed, which comprises a thin portion on the terminal side connected to a thick portion, and the thin portion is unevenly engaged with the first resin molding layer or the metal member.
- the outer surface of the first resin molding layer has another portion near the concave-convex engagement portion with the thin portion.
- An electromagnetic fuel injection valve characterized by being formed on a rougher surface is proposed.
- the first resin molded layer is formed of a liquid crystal polymer mixed with glass fibers.
- An electromagnetic fuel injection valve characterized by the following is proposed.
- the second resin is made of a thermoplastic polyester elastomer from which glass fiber is not mixed.
- An electromagnetic fuel injection valve characterized in that a molded layer is formed is proposed. The invention's effect
- the resin molding portion has a two-layer structure including a first resin molding layer and a second resin molding layer, and is made of a synthetic resin mixed with glass fibers. Forming the first resin molding layer, the connection portion of the coil and the connection terminal of the coil assembly is covered with the first resin molding layer and at least a part of the power receiving bra is formed of the first resin molding layer.
- the resin molded part can have strength enough to secure the reliability of the electrical connection part, and the second resin molded layer covering the first resin molded layer eliminates glass fiber contamination. Since it is formed of the thermoplastic polyester elastomer described above, it is possible to effectively suppress the generation of operation noise due to the excellent flexibility of the thermoplastic polyester elastomer. As compared with the case where the entire fuel injection valve is covered with the soundproof cover, the electromagnetic fuel injection valve can be compacted.
- the liquid crystal polymer has a function of relatively suppressing the transmission of operation noise, and has high rigidity. And the generation of operation noise can be more effectively suppressed.
- the resin molding portion has a two-layer structure including a first resin molding layer and a second resin molding layer, and has a relatively high bending strength. Since the first resin molding layer is formed by the first resin molding layer, the connection portion between the coil of the coil assembly and the power receiving side connection terminal is covered with the first resin molding layer, and the main part of the power bra that forms the skeleton of the power receiving power bra is formed by the first resin molding layer.
- the second resin molding layer which covers the first resin molding layer, can have strength enough to secure the reliability of the electrical connection part by forming the resin molding layer with the resin molding layer. Is made of synthetic resin with relatively low bending strength, it is possible to effectively suppress the generation of operating noise.
- the entire fuel injection valve can be compacted. By forming two layers up to the middle part of the power receiving bra, the strength required for the power receiving bra can be obtained with the first resin molding layer, while the power receiving force of the second resin molding layer can be obtained. It is possible to effectively reduce the generation of the operation noise.
- the second resin molding layer engages with the engagement groove of the first resin molding layer, so that the contraction of the second resin molding layer after the completion of the two-layer molding is suppressed.
- the adhesion between the two layers can be enhanced to improve the product quality.
- the bending resistance is relatively low, and the protrusion formed on the second resin molding layer is brought into elastic contact with the power supply force bra to increase the vibration resistance,
- the resonance noise can be reduced, and by forming the engagement projections for engaging the power supply power bra on the first resin molding layer with relatively high bending strength, enough to withstand repeated attachment and detachment of the power supply power bra. Durability can be ensured.
- the liquid crystal polymer mixed with glass fibers has a function of relatively suppressing the transmission of operation noise, and has high rigidity, and therefore, the signal of the electrical connection portion is high. It is possible to further increase the strength for ensuring reliability and to more effectively suppress the generation of operation noise.
- thermoplastic polyester elastomer from which glass fiber is not mixed has excellent elasticity, and can effectively suppress generation of operation noise.
- the resin molding portion has a two-layer structure including the first resin molding layer and the second resin molding layer, and has a relatively small linear expansion coefficient.
- First resin molding with resin Since the layer is formed, the connection portion of the coil of the coil assembly and the power receiving side connection terminal is covered with the first resin molding layer, and at least a part of the power receiving bra is formed of the first resin molding layer.
- the resin molding part can have strength enough to secure the reliability of the electrical connection part, and the second resin molding layer covering the first resin molding layer has a relatively large coefficient of linear expansion.
- the second resin molding layer is formed of a flexible synthetic resin, the flexibility of the second resin molding layer makes it possible to effectively suppress the generation of operation noise, and an air layer is partially formed between the first and second resin molding layers. Since it is formed, transmission of the operation sound can be further suppressed. As compared with the case where the entire fuel injection valve is covered with the soundproof cover, the electromagnetic fuel injection valve can be compacted.
- the eighth feature of the present invention by changing the thickness of the second resin molding layer depending on the portion, the amount of shrinkage at the time of cooling immediately after molding is partially changed, and the thickness of the thick portion is reduced.
- An air layer can be automatically formed around the periphery. That is, the cooling rate of the thin part on the end side is relatively high, and the degree of shrinkage can be reduced because the degree of adhesion to the first resin molding layer or the metal member is increased by the concave and convex engagement.
- the thick portion has a relatively low cooling rate and a relatively large shrinkage amount. Therefore, the concave-convex engagement suppresses the shrinkage on the terminal side of the second resin molding layer while maintaining the center of the second resin molding layer.
- the air layer can be formed by gently cooling the part and contracting it relatively greatly.
- the ninth feature of the present invention it is possible to increase the adhesion of the terminal side of the second resin molding layer to the first resin molding layer, and to improve the second resin after the two-layer molding.
- the quality can be improved by suppressing the shrinkage of the molded layer.
- the liquid crystal polymer has a function of relatively suppressing transmission of operation noise, and has high rigidity. Therefore, it is possible to further increase the intensity of the noise and more effectively suppress the generation of the operation noise.
- thermoplastic polyester elastomer from which glass fiber is not mixed has excellent elasticity, and effectively suppresses generation of operation noise. Becomes possible.
- FIG. 1 is a longitudinal sectional view of an electromagnetic fuel injection valve of a first embodiment. (First embodiment)
- FIG. 2 is a graph showing the relationship between the bending strength and the operating sound pressure peak of a liquid crystal polymer and a thermoplastic polyester elastomer mixed with glass fibers. (First embodiment)
- FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. (First embodiment)
- FIG. 4 is a longitudinal sectional view of an electromagnetic fuel injection valve of a second embodiment. (Second embodiment)
- FIG. 5 is a longitudinal sectional view of an electromagnetic fuel injection valve according to a third embodiment. (Third embodiment)
- FIG. 6 is a longitudinal sectional view of an electromagnetic fuel injection valve. (Fourth embodiment)
- FIG. 7 is a graph showing the relationship between the coefficient of linear expansion and the peak operating sound pressure of a liquid crystal polymer and a thermoplastic polyester elastomer mixed with glass fibers. (Fourth embodiment) Explanation of reference numerals
- FIG. 1 to FIG. 3 show a first embodiment of the present invention.
- an electromagnetic fuel injection valve for injecting fuel into an engine (not shown) is resiliently biased in a valve housing 8 having a valve seat 13 at a front end in a direction of sitting on the valve seat 13.
- a valve operating portion 5 in which the valve body 20 is accommodated and a coil assembly 24 capable of exerting an electromagnetic force for driving the valve body 20 on the side separated from the valve seat 13 are provided in the valve housing 8.
- the solenoid unit 6 accommodated in the solenoid and housing 25 provided continuously and the power receiving force bra 40 that faces the power receiving side connection terminal 38 connected to the coil 30 of the coil assembly 24 are integrally provided.
- An assembly 24 and a synthetic resin resin molding 7 in which the solenoid nozzle 25 is embedded are provided.
- the valve housing 8 includes a magnetic cylinder 9 formed of a magnetic metal, and a valve seat member 10 that is liquid-tightly coupled to a front end of the magnetic cylinder 9.
- the valve seat member 10 is welded to the magnetic cylinder 9 with its rear end fitted to the front end of the magnetic cylinder 9, and this valve seat member 10 has an opening at its front end face.
- a fuel outlet hole 12, a tapered valve seat 13 connected to the inner end of the fuel outlet hole 12, and a guide hole 14 connected to a large diameter portion at the rear end of the valve seat 13 are provided coaxially.
- An injector plate 16 made of a steel plate and having a plurality of fuel injection holes 15 communicating with the fuel outlet hole 12 is liquid-tightly welded to the front end of the valve seat member 10 in a liquid-tight manner.
- a movable core 18 forming a part of the solenoid portion 6 is slidably fitted to a rear portion inside the valve housing 8, and a front end of a valve shaft 19 integrally connected to the movable core 18 is provided at the front end.
- a valve body 20 which can be seated on the valve seat 13 to close the fuel outlet hole 12 is formed in the body.
- a through hole 21 communicating with the inside of the valve housing 8 is formed in the movable core 18, the valve shaft 19 and the valve body 20 coaxially with a closed bottom at the front end.
- the solenoid portion 6 exerts a spring force that urges the movable core 18, a cylindrical fixed core 22 facing the movable core 18, and a side that separates the movable core 18 from the fixed core 22.
- the rear of the valve housing 8 and the fixed core 22 are surrounded while allowing the return spring 23 and the spring force of the return spring 23 to exert an electromagnetic force for attracting the movable core 18 to the fixed core 22 side. It includes a coil assembly 24 to be arranged, and a solenoid housing 25 surrounding the coil assembly 24 so that the front end is connected to the valve housing 8.
- the rear end of the magnetic cylinder 9 in the valve housing 8 is coaxially coupled to the front end of the fixed core 22 via a nonmagnetic cylinder 26 formed of a nonmagnetic metal such as stainless steel.
- the rear end of the magnetic cylinder 9 is butt-welded to the front end of the non-magnetic cylinder 26, and the rear end of the non-magnetic cylinder 26 has the front end of the fixed core 22 fitted to the non-magnetic cylinder 26. It is welded to the fixed core 22 in the state.
- a cylindrical retainer 27 is fitted to the fixed core 22 and fixed by squeezing.
- the return spring 23 is interposed between the retainer 27 and the movable core 18.
- a ring-shaped stopper 28 made of non-magnetic material is also provided on the inner periphery of the rear end of the movable core 18 to prevent the movable core 18 from directly contacting the fixed core 22. It is fitted and fixed so that it protrudes slightly to the 22 side.
- the coil assembly 24 is configured by winding a coil 30 around a bobbin 29 surrounding the rear portion of the valve housing 8, the non-magnetic cylinder 26 and the fixed core 22.
- the solenoid 25 has an annular end wall 31a at one end facing the valve operating portion 5 side end of the coil assembly 24, and has a cylindrical shape surrounding the coil assembly 24 and is formed of magnetic metal.
- a magnetic frame 31 formed, and a flange portion 22a projecting radially outward from the rear end of the fixed core 22 and facing the end opposite to the valve operating portion 5 of the coil assembly 24.
- the flange portion 22a is magnetically coupled to the other end of the magnetic frame 31.
- a fitting cylinder portion 31b for fitting the magnetic cylinder 9 in the valve housing 8 is coaxially provided on the inner periphery of the end wall 31a of the magnetic frame 31.
- the solenoid nozing 25 is The valve housing 8 is fitted to the fitting cylindrical portion 31b to be connected to the valve housing 8.
- a cylindrical inlet tube 33 is coaxially connected to the body, and a fuel filter 34 is mounted on the rear portion of the inlet tube 33.
- the force is also the inlet cylinder 33, retaining
- a fuel passage 35 communicating with the through hole 21 of the movable core 18 is provided coaxially with the nut 27 and the fixed core 22.
- the resin molding portion 7 fills a gap between the solenoid housing 25 and the coil assembly 24, which is formed only by the solenoid housing 25 and the coil assembly 24, and a part of the valve housing 8 and a large portion of the inlet tube 33.
- the magnetic frame 31 of the solenoid housing 25 has an arm 29a formed integrally with the bobbin 29 of the coil assembly 24 for arranging the arm 29a outside the solenoid housing 25.
- a notch 36 is provided.
- the resin molding section 7 is provided with a power receiving power bra 40 having a cylindrical wall 39 facing the power receiving side connection terminals 38 connected to both ends of the coil 30 in the coil assembly 24.
- the base ends of the power receiving side connection terminals 38 are embedded in the arms 29a, and the coil ends 30a 'of the coil 30 are welded to the power receiving side connection terminals 38.
- the resin molding portion 7 covers at least a part of the solenoid housing 25 and also forms a first resin molding layer 7a constituting a power bra main portion 40a constituting a framework of the power receiving power bra 40
- the intermediate portion force of the power receiving power bra 40 is also formed by forming two layers of the second resin molding layer 7b covering the first resin molding layer 7a so that the first resin molding layer 7a is exposed on the tip side.
- the entirety of the solenoid housing 25, the rear part of the valve housing 8 and a part of the inlet cylinder 33 are covered with the first resin molding layer 7a, and the power bra main part 40a of the power receiving power bra 40 is It is formed of a resin molding layer 7a.
- the first resin molding layer 7a is formed of a material having a relatively large bending strength, whereas the second resin molding layer 7b has a higher bending strength than the first resin molding layer 7a.
- the first resin molding layer 7a is formed of, for example, a liquid crystal polymer into which glass fibers are mixed, and the second resin molding layer 7b is formed by eliminating glass fibers.
- Thermoplastic polyester elastomers such as those formed by the trade name No. Itrell (DuPont, USA)
- the relationship between the bending strength when the entire resin molded part 7 is formed of a liquid crystal polymer mixed with 35% glass fiber, for example, and the operating sound pressure peak generated from the resin molded part 7 is shown by a point A in FIG.
- the liquid crystal polymer has a function of relatively suppressing the transmission of operation noise and has high rigidity.
- thermoplastic without mixing glass fiber When the entire resin molded part 7 is formed of polyester elastomer, the generation of operation noise can be effectively suppressed by the excellent flexibility of the thermoplastic polyester elastomer. As shown by, although the bending strength is lower than that of the liquid crystal polymer, the operating sound pressure peak can be kept low.
- the intermediate portion force of the power receiving power bra 40 is also at the distal end side, so that the first resin molding layer 7a is not covered by the second resin molding layer 7b and is exposed to the outside.
- a portion of the first resin molding layer 7a at a portion corresponding to the rear portion is not covered by the second resin molding layer 7b but is exposed to the outside, and the intermediate portion of the power receiving power bra 40 and the valve housing 8 are provided.
- the endless engagement grooves 41 and 42 are formed so as to have, for example, a substantially U-shaped cross section.
- a power feeding bra 46 made of a synthetic resin having a concave portion 45 into which the cylindrical wall 39 is inserted, to the power receiving power bra 40.
- the power supply power bra 46 has an insertion portion 47 that can be inserted into the cylindrical wall 39 of the power reception power bra 40, and is provided in the insertion portion 47 so that the power receiving side connection terminals 38 are inserted.
- Power-supply-side connection terminals 49 that enable electrical connection with the power-reception-side connection terminals 38 are provided in a pair of connection holes 48, respectively.
- a lead wire 50 extending from the power feed bra 46 extends from the power feed bra 46.
- protrusions 51 are provided so as to come into contact with the inner surface of the concave portion 45.
- three projections 51 are provided on the outer surface of the cylindrical wall 39 so as to resiliently contact the inner surface of the recess 45, and the projections 51 are parts of the power receiving bra 40.
- a second resin molding layer 7b is formed.
- a part of the side wall of the cylindrical wall 39 is formed of a flat wall portion 39a.
- the wall 39a has a pair of guide walls 52, 52 protruding laterally from the cylindrical wall 39.
- the power supply bra 46 has a pair of guide recesses 53, 53 opening on the inner surface of a recess 45 into which the cylindrical wall 39 is inserted, and the guide walls 52, 53. 52 is detachably fitted
- the guide walls 52 are also formed on the first resin molding layer 7a.
- an engagement projection 55 for removably engaging an engagement claw 54 provided on the power supply force bra 46 is provided on the outer surface of the side wall of the cylindrical wall 39 on the side of the solenoid housing 25 .
- the engagement projection 55 is a portion forming a part of the power receiving force bra 40 and is a first resin. It is formed on the molding layer 7a.
- the resin molding portion 7 covers at least a part of the solenoid housing 25 and forms a coupler main portion 40a forming a skeleton of the power receiving coupler 40.
- the first resin molding layer 7a and the first resin molding layer 7a are formed of a material having a lower bending strength than the first resin molding layer 7a, and the first resin molding layer 7a is exposed at the tip of the middle portion of the power receiving bra 40.
- two layers of the second resin molding layer 7b covering the first resin molding layer 7a are formed.
- connection portion between the coil 30 and the power receiving side connection terminals 38 of the coil assembly 24 is covered with the first resin molding layer 7a, and the power bra main portion 40a forming the skeleton of the power receiving power bra 40 is formed of the first resin.
- the resin molded part 7 can be formed with the molded layer 7a so that the resin molded part 7 has sufficient strength to ensure the reliability of the electrical connection.
- the second resin molding layer 7b covering the first resin molding layer 7a is formed of a synthetic resin having a relatively low bending strength, it is possible to effectively suppress the generation of operation noise, and Compared to the case where the whole fuel injection valve is covered with the soundproof cover, the whole electromagnetic fuel injection valve can be made compact.
- the strength required for the power receiving bra 40 is obtained by the first resin forming layer 7a and the second resin forming layer 7b. Generation of operation noise from the power receiving power bra 40 can be effectively reduced.
- the first resin molding layer 7a is formed of a liquid crystal polymer mixed with glass fibers, and the liquid crystal polymer mixed with glass fibers relatively suppresses transmission of operation noise. Since it has a function of high rigidity and high rigidity, it is possible to further increase the strength for ensuring the reliability of the electrical connection portion, and it is possible to more effectively suppress the generation of operation noise.
- the second resin molding layer 7b is formed of a thermoplastic polyester elastomer from which glass fibers are not mixed. The thermoplastic polyester elastomer from which glass fibers are mixed is excellent in elasticity. Therefore, the generation of the operation noise can be effectively suppressed.
- the first resin molding layer 7a is formed with the endless engagement grooves 41 for engaging the second resin molding layer 7b.
- the shrinkage of the second resin molding layer 7b after completion can be suppressed, and the adhesion between the two layers can be increased to improve the product quality.
- an endless engagement groove 42 for engaging the second resin molding layer 7b is formed in the first resin molding layer 7a even in a portion corresponding to the rear part of the valve housing 8. The product quality can be further improved.
- the power receiving power bra 40 having a cylindrical wall 39 facing the power receiving side connection terminals 38... Is detachably connected to a power transmitting power bra 46 having a concave portion 45 into which the cylindrical wall 39 is inserted.
- a power supply side connection terminal 49 is provided on the power supply bra 46 for enabling electrical connection with the power supply bra 46.
- the inner surface of the recess 45 is sporadically formed.
- a projecting part 51 is in contact!
- the vibration of the power receiving power bra 40 and the power feeding power bra 46 which does not cause the cylinder wall 39 to vibrate in the concave portion 45, can be suppressed to suppress the generation of the operation noise, thereby suppressing the generation of the operation noise.
- No dedicated member is required, and an increase in the number of parts can be avoided to reduce costs.
- the protrusions 51 are formed in the second resin molding layer 7b at a portion that constitutes a part of the power receiving power bra 40, vibration resistance is further improved and resonance noise is further reduced. Is possible.
- a pair of guide walls 52, 52 protruding laterally from the cylindrical wall 39 are flush with the wall 39a, on a flat wall 39a constituting a part of the side wall of the cylindrical wall 39.
- a pair of guide recesses 53, 53 which are opened integrally on the inner surface of the recess 45 into which the cylindrical wall 39 is inserted, so that the power feeding bra 46 can be removed from the guide walls 52, 52. Since it is provided so that it can be fitted, the shape for guiding the cylindrical wall 39 in the concave portion 45 is simplified, and the shape of the mold for forming the power receiving fobber 40 and the power feeding power bra 46 is simplified. , Manufacturing cost Can be reduced.
- an engagement projection 55 for removably engaging the engagement claw 54 of the power supply bra 46 is provided on the outer surface of the side wall of the cylindrical wall 39 on the side of the solenoid housing 25.
- a protective wall for protecting the engaging portion of the power feeding bra 46 with the power receiving power bra 40 is not required, so that the shape of the power feeding bra 46 is simplified, and a mold for forming the power feeding bra 46 is used. The manufacturing cost can be further reduced by the simple shape.
- the engaging projections 55 are also arranged such that the engaging projections 55 sandwich the engaging groove 41 provided at an intermediate portion of the power receiving power bra 40 between the protruding parts 51. Since the portion forming the portion is formed on the first resin molding layer 7a, the engagement protrusion 55 for engaging the power feeding bra 46 is formed on the first resin molding layer 7a having a relatively high bending strength. Thereby, sufficient durability to withstand repeated attachment and detachment of the power supply power bra 46 can be ensured.
- an intermediate portion of the power receiving bra 40 is engaged with the first resin molded layer 7a in an endless shape with a substantially V-shaped cross section.
- a groove 57 may be provided to engage the second resin molding layer 7b.
- an engaging groove 58 that is endlessly continuous with the first resin molding layer 7a at the intermediate portion of the power receiving power bra 40 is provided with a second resin molding. It is provided so as to engage the molding layer 7b in a wedge shape! /.
- the outer surface of a portion of the first resin molding layer 7a covered with the second resin molding layer 7b is subjected to crimping, or the outer surface is formed with corrugations.
- the adhesiveness between the first and second resin molding layers 7a and 7b may be increased by forming them.
- FIGS. 6 and 7 show a fourth embodiment of the present invention. Parts corresponding to the above-described first to third embodiments are given the same reference numerals, and are only shown in the drawings. Detailed description is omitted.
- the coil assembly 24 and the solenoids 25 and the housing 25 are integrated with a power receiving power bra 40 that faces a power receiving side connection terminal 38 ′′ connected to the coil 30 of the coil assembly 24.
- the sealed synthetic resin resin molding part 37 fills the gap between the solenoid housing 25 and the coil assembly 24, which are connected only by the solenoid housing 25 and the coil assembly 24, while part of the valve housing 8 and the inlet cylinder.
- the magnetic frame 31 of the solenoid nosing 25 has an arm 29a formed integrally with the bobbin 29 of the coil assembly 24, and is formed so as to embed most of the portion 33.
- a notch 36 is provided for placement outside the housing 25.
- the resin molding portion 37 is provided with a power receiving power bra 40 that faces the power receiving side power receiving side connection terminals 38 connected to both ends of the coil 30 in the coil assembly 24.
- the base end of the power receiving side connection terminal 38 is embedded in the arm portion 29a, and the coil ends 30a 'of the coil 30 are welded to the power receiving side connection terminals 38,.
- the resin molding portion 37 covers at least a part of the solenoid housing 25 and forms a part of the power receiving power bra 40 and a first resin molding layer 37a and a first resin molding layer 337a.
- the entirety of the solenoid housing 25, the rear part of the valve housing 8 and a part of the inlet cylinder 33 are formed by the first resin molding layer 3b.
- a part of the power receiving bra 40 is covered with the first resin molding layer 37a while being covered with 7a.
- the first resin forming layer 37a is formed of a material having a relatively large bending strength, for example, a liquid crystal polymer mixed with glass fiber, whereas the second resin forming layer 37b is formed of a bending strength.
- the first resin molding layer 37a is formed of a material smaller than the first resin molding layer 37a, for example, a thermoplastic polyester elastomer from which glass fiber is not mixed, such as Hytrel (trade name, DuPont, USA).
- the relationship between the bending strength when the entire resin molded portion 37 is formed of a liquid crystal polymer in which glass fibers are mixed at, for example, 35%, and the operating sound pressure peak generated from the resin molded portion 37 are shown in FIG.
- the liquid crystal polymer has a function of relatively suppressing the transmission of operation noise and is also highly rigid.
- the entire resin molded part 37 is formed of thermoplastic polyester elastomer from which glass fiber is not mixed, the generation of operation noise is effectively suppressed by the excellent flexibility of the thermoplastic polyester elastomer.
- point B in FIG. 7 the bending sound strength is smaller than that of the liquid crystal polymer, but the operating sound pressure peak can be suppressed low.
- the second resin molded layer 37b is composed of a thick portion 37ba at the center thereof and thin portions 37bb, 37bc, 37bd on the terminal side connected to the thick portion as being thinner than the thick portion 37ba,
- the thin portions 37bb-37bd are unevenly engaged with the first resin molding layer 37a or the inlet tube 33 which is a metal member.
- the intermediate portion force of the power receiving bra 40 is also at the distal end side, the first resin molding layer 37a is not covered by the second resin molding layer 37b and is exposed to the outside. Is exposed to the outside without being covered by the second resin molding layer 37b, and a part of the first resin molding layer 37a at a portion corresponding to the rear part of the valve housing 8 is covered by the second resin molding layer 37b. It is not covered and is exposed outside.
- the first resin molding layer 37a in the middle part of the power receiving power bra 40 and the part corresponding to the rear part of the valve and housing 8 includes the ends of the thin-walled parts 37bb, 37bd of the second resin molding layer 37b. Endless engagement grooves 41 and 42 for engaging the engagement portions are formed.
- engagement projections 43 that engage with the inner surface of the thin portion 37bc of the second resin molding layer 37b are provided. Is protruded.
- the outer surface of the first resin molding layer 37a is formed to have a rougher surface than the other portions due to the formation of a grain pattern or the formation of corrugations in the vicinity of the concave / convex engaging portion with the thin portions 37bb and 37bd.
- the resin molding portion 37 covers at least a part of the solenoid housing 25 and forms a part of the power receiving bra 40. It is formed by forming two layers of a layer 37a and a second resin molding layer 37b formed of a material having a larger linear expansion coefficient than the first resin molding layer 37a and covering the first resin molding layer 37a. .
- the connection between the coil 30 and the power receiving side connection terminals 38 of the coil assembly 24 is covered with the first resin molding layer 37a, and the main part of the power receiving bra 40 is formed of the first resin molding layer 37a.
- the resin molded portion 37 can have strength enough to ensure the reliability of the electrical connection portion.
- the second resin molding layer 37b covering the first resin molding layer 37a is formed of a synthetic resin having a relatively large coefficient of linear expansion, it is possible to effectively suppress the generation of operation noise. Since the air layer 44 is partially formed between the first and second resin molding layers 37a, 37b, transmission of operation noise can be further suppressed. Also fuel injection Compared to a case where the whole valve is covered with a soundproof cover, the whole electromagnetic fuel injection valve can be made compact.
- the first resin molding layer 37a is formed of a liquid crystal polymer mixed with glass fibers, and the liquid crystal polymer mixed with glass fibers relatively suppresses transmission of operation noise. Since it has a function of high rigidity and high rigidity, it is possible to further increase the strength for ensuring the reliability of the electrical connection portion, and it is possible to more effectively suppress the generation of operation noise.
- the second resin molding layer 37b is formed of a thermoplastic polyester elastomer from which glass fibers are not mixed, and the thermoplastic polyester elastomer from which glass fibers are mixed is excellent in elasticity. Therefore, it is possible to effectively suppress the generation of the operation noise.
- the second resin molding layer 37b is composed of a thick portion 37ba at the center thereof and thin portions 37bb, 37bc, 37bd on the terminal side which are thinner than the thick portion 37ba and are continuous with the thick portion 37ba.
- the thin-walled portions 37bb and 37bd are unevenly engaged with the first resin molding layer 37a at portions corresponding to the intermediate portion of the power receiving coupler 40 and the rear portion of the valve housing 8 to form the inlet tube 33 integral with the fixed core 22. Since the thin portion 37bc is unevenly engaged with the intermediate portion, the shrinkage during cooling immediately after the molding is partially changed by changing the thickness of the second resin molding layer 37b depending on the position, The air layer 44 can be automatically formed around the thick portion 37ba.
- the thin portion 37bb-37bd on the terminal side has a relatively high cooling rate and a large force, and the degree of contraction with the first resin molding layer 37 or the inlet cylinder 33 is increased by the concave-convex engagement, so that the contraction amount is reduced. Since the cooling rate of the thick portion 37ba at the center is relatively slow and the shrinkage amount is relatively large, the concave / convex engagement allows the thick portion 37ba at the distal end of the second resin molding layer 37b to be formed. It is possible to form the air layer 44 in the peripheral portion of the thick portion 37ba by gently cooling the central portion of the second resin molding layer 37b while suppressing the Become.
- the outer surface of the first resin molding layer 37a is formed to be rougher than the other portions near the concave / convex engagement portion with the thin portions 37bc and 37bd.
- the adhesion to the first resin molding layer 37a on the terminal side can be improved, and the second resin molding layer 37b shrinks after the two-layer molding. And the quality can be improved.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/589,500 US20070215117A1 (en) | 2004-02-27 | 2005-02-25 | Electromagnetic Fuel Injection Valve |
EP05719527A EP1719905B1 (en) | 2004-02-27 | 2005-02-25 | Electromagnetic fuel injection valve |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-053691 | 2004-02-27 | ||
JP2004053691A JP2005240731A (ja) | 2004-02-27 | 2004-02-27 | 電磁式燃料噴射弁 |
JP2004065985A JP3955030B2 (ja) | 2004-03-09 | 2004-03-09 | 電磁式燃料噴射弁 |
JP2004065984A JP3981093B2 (ja) | 2004-03-09 | 2004-03-09 | 電磁式燃料噴射弁 |
JP2004-065985 | 2004-03-09 | ||
JP2004-065984 | 2004-03-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005083259A1 true WO2005083259A1 (ja) | 2005-09-09 |
Family
ID=34916089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/003126 WO2005083259A1 (ja) | 2004-02-27 | 2005-02-25 | 電磁式燃料噴射弁 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070215117A1 (ja) |
EP (1) | EP1719905B1 (ja) |
MY (1) | MY138028A (ja) |
WO (1) | WO2005083259A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0516023B1 (pt) * | 2004-09-27 | 2018-04-03 | Keihin Corporation | Válvula de injeção de combustível eletromagnética |
JP4948295B2 (ja) * | 2007-07-06 | 2012-06-06 | 愛三工業株式会社 | 燃料噴射弁 |
JP4897728B2 (ja) * | 2008-03-18 | 2012-03-14 | 株式会社ケーヒン | 電磁式燃料噴射弁 |
DE102011006824A1 (de) * | 2011-04-06 | 2012-10-11 | Robert Bosch Gmbh | Ventil zum Zumessen eines Mediums |
EP3346122B1 (de) * | 2017-01-10 | 2019-07-17 | Continental Automotive GmbH | Elektromagnetisches schaltventil und kraftstoffhochdruckpumpe |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5744633A (en) * | 1980-08-30 | 1982-03-13 | Toyoda Gosei Co Ltd | Soundproof material of synthetic resin |
JPS62195452A (ja) | 1986-02-20 | 1987-08-28 | Nippon Denso Co Ltd | 電磁式燃料噴射弁用防音カバ− |
JPS6341658A (ja) | 1986-08-08 | 1988-02-22 | Nippon Denso Co Ltd | 電磁式燃料噴射弁 |
JPH0332781Y2 (ja) * | 1984-02-09 | 1991-07-11 | ||
JPH05164017A (ja) * | 1991-12-10 | 1993-06-29 | Nippon Injiekuta Kk | 電磁式燃料噴射弁 |
JPH0842424A (ja) * | 1995-07-03 | 1996-02-13 | Nippondenso Co Ltd | 内燃機関のインジェクタ用コネクタブロック |
JPH08189436A (ja) * | 1995-01-09 | 1996-07-23 | Aisan Ind Co Ltd | 電磁式燃料噴射弁 |
JPH09151788A (ja) * | 1995-11-29 | 1997-06-10 | Aisin Seiki Co Ltd | 防音カバー |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1640742A (en) * | 1924-05-21 | 1927-08-30 | Gen Motors Res Corp | Pump |
GB8714494D0 (en) * | 1987-06-20 | 1987-07-22 | Lucas Ind Plc | Linear inductive transducer |
US5449120A (en) * | 1991-06-11 | 1995-09-12 | Nippondenso Co., Ltd. | Fuel feed apparatus of internal combustion engine |
-
2005
- 2005-02-24 MY MYPI20050710A patent/MY138028A/en unknown
- 2005-02-25 US US10/589,500 patent/US20070215117A1/en not_active Abandoned
- 2005-02-25 WO PCT/JP2005/003126 patent/WO2005083259A1/ja active Application Filing
- 2005-02-25 EP EP05719527A patent/EP1719905B1/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5744633A (en) * | 1980-08-30 | 1982-03-13 | Toyoda Gosei Co Ltd | Soundproof material of synthetic resin |
JPH0332781Y2 (ja) * | 1984-02-09 | 1991-07-11 | ||
JPS62195452A (ja) | 1986-02-20 | 1987-08-28 | Nippon Denso Co Ltd | 電磁式燃料噴射弁用防音カバ− |
JPS6341658A (ja) | 1986-08-08 | 1988-02-22 | Nippon Denso Co Ltd | 電磁式燃料噴射弁 |
JPH05164017A (ja) * | 1991-12-10 | 1993-06-29 | Nippon Injiekuta Kk | 電磁式燃料噴射弁 |
JPH08189436A (ja) * | 1995-01-09 | 1996-07-23 | Aisan Ind Co Ltd | 電磁式燃料噴射弁 |
JPH0842424A (ja) * | 1995-07-03 | 1996-02-13 | Nippondenso Co Ltd | 内燃機関のインジェクタ用コネクタブロック |
JPH09151788A (ja) * | 1995-11-29 | 1997-06-10 | Aisin Seiki Co Ltd | 防音カバー |
Non-Patent Citations (1)
Title |
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See also references of EP1719905A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1719905B1 (en) | 2012-10-31 |
EP1719905A1 (en) | 2006-11-08 |
EP1719905A4 (en) | 2010-11-17 |
US20070215117A1 (en) | 2007-09-20 |
MY138028A (en) | 2009-04-30 |
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