WO2014171038A1 - 燃料噴射弁 - Google Patents

燃料噴射弁 Download PDF

Info

Publication number
WO2014171038A1
WO2014171038A1 PCT/JP2013/083368 JP2013083368W WO2014171038A1 WO 2014171038 A1 WO2014171038 A1 WO 2014171038A1 JP 2013083368 W JP2013083368 W JP 2013083368W WO 2014171038 A1 WO2014171038 A1 WO 2014171038A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle hole
valve seat
hole plate
valve
fuel
Prior art date
Application number
PCT/JP2013/083368
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
直也 橋居
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201380075715.7A priority Critical patent/CN105121834B/zh
Publication of WO2014171038A1 publication Critical patent/WO2014171038A1/ja
Priority to PH12015502333A priority patent/PH12015502333A1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates
    • F02M61/186—Multi-layered orifice plates
    • 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
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends

Definitions

  • the present invention relates to a fuel injection valve used for supplying fuel to an internal combustion engine of an automobile, and more particularly to a fuel injection valve that achieves both atomization promotion in spray characteristics and improvement in freedom of injection direction. .
  • the radially outer nozzle hole length is shorter than the radially inner nozzle hole length with respect to the fuel injection valve shaft center.
  • Recent automobile gasoline internal combustion engines are equipped with one fuel injection valve per cylinder in order to improve controllability of fuel supply into the cylinder.
  • the fuel injection valve directs fuel in two directions toward each intake port. It is required to be injected.
  • the injection holes arranged in the injection hole plate are jets that form a collective spray in two directions with a plurality of injection holes. It is necessary to make the hole direction.
  • the direction of the nozzle holes projected perpendicular to the plane perpendicular to the valve seat axis has a predetermined angle with respect to the radial direction from the valve seat axis. Therefore, when the main flow of the fuel flow from the valve seat to the injection hole inlet is projected perpendicularly to the plane, the injection hole direction does not face the main flow of the fuel flow.
  • the nozzle holes are arranged so as to be offset in the direction of the respective collective sprays, the nozzle holes at the end of the nozzle hole group are more than the main flow of the fuel flow from the valve seat to the nozzle hole inlet.
  • the side flow from the valve seat seat part to the nozzle hole inlet where the nozzle hole is not arranged on a radial straight line from the valve seat axis, and the U-turn flow from the valve seat axis once to the nozzle hole inlet Becomes stronger. For this reason, there was a problem that fuel thinning was hindered, atomization deteriorated, and the degree of freedom in the injection direction and atomization could not be made compatible.
  • a recess is formed in correspondence with the nozzle hole outlet of each nozzle hole, and straddles the radially inner surface of the valve seat axis of this recess.
  • a nozzle hole is formed as described above. As a result, a portion of the nozzle hole on the radially outer side of the valve seat axis is cut away, and the nozzle hole length on the radially outer side than the nozzle hole length on the radially inner side with respect to the fuel injection valve shaft center. Has been shortened.
  • the present invention has been made to solve the above-described problems, and an object thereof is to obtain a fuel injection valve capable of improving the degree of freedom in the injection direction while promoting atomization of the injected fuel.
  • the fuel injection valve according to the present invention has a seat surface that is inclined so that the diameter is gradually reduced toward the downstream side, and a valve seat opening provided on the downstream side of the seat surface.
  • a valve body that abuts against the valve seat and the seat surface to prevent fuel from flowing out from the valve seat opening, and that is separated from the seat surface to allow fuel outflow from the valve seat opening, and a downstream end surface of the valve seat
  • a nozzle hole plate having a plurality of nozzle holes for injecting fuel that has flowed out of the valve seat opening to the outside, the nozzle hole plate being a virtual conical surface extending the seat surface downstream And the upstream end face of the nozzle hole plate are arranged so as to intersect with each other to form a virtual circle.
  • the nozzle hole is adjacent to the nozzle hole main body and downstream of the nozzle hole main body and constitutes the outlet of the nozzle hole.
  • the diameter of the large-diameter part is larger than the diameter of the nozzle hole body.
  • the inlet part of the nozzle hole body is arranged on the valve seat axis side with respect to the valve seat opening which is the minimum inner diameter of the valve seat, and the nozzle hole is perpendicular to the plane perpendicular to the valve seat axis.
  • the inlet center and outlet center of the nozzle hole body on the plane are arranged side by side on a radial straight line passing through the valve seat axis, and the outlet center is separated from the valve seat axis with respect to the inlet center. Since the center of the large diameter portion is offset with respect to the straight line, the length of the inner wall of the nozzle hole on the valve seat axis side of the nozzle hole body is asymmetric with respect to the straight line.
  • the fuel injection valve of the present invention can improve the degree of freedom in the injection direction while promoting atomization of the injected fuel.
  • FIG. 1 is a cross-sectional view taken along the axis of a fuel injection valve according to Embodiment 1 of the present invention.
  • a cylindrical fixed iron core 2 is fixed to the upper end of the magnetic pipe 1.
  • the magnetic pipe 1 and the fixed iron core 2 are arranged coaxially. Further, the magnetic pipe 1 is press-fitted and welded to the downstream end portion of the fixed iron core 2.
  • the valve seat 3 and the injection hole plate 4 are fixed to the lower end portion in the magnetic pipe 1.
  • the nozzle hole plate 4 is provided with a plurality of nozzle holes 5 for injecting fuel.
  • the nozzle hole 5 penetrates the nozzle hole plate 4 in the thickness direction.
  • the nozzle hole plate 4 is fixed to the magnetic pipe 1 by the second welded portion 4b after being inserted into the magnetic pipe 1 while being fixed to the downstream end face of the valve seat 3 by the first welded portion 4a. Has been.
  • the magnetic pipe 1 there are a ball 6 as a valve body, a needle pipe 7 welded and fixed to the ball 6, and an armature fixed to the upstream end (the end opposite to the ball 6) of the needle pipe 7. (Movable iron core) 8 is inserted. The amateur 8 is press-fitted into the upstream end portion of the needle pipe 7 and welded.
  • the amateur 8 is slidable in the axial direction within the magnetic pipe 1.
  • a guide portion 1 a that guides the sliding of the armature 8 is provided.
  • the needle pipe 7 and the armature 8 also move together in the axial direction.
  • the ball 6 is seated / separated from the valve seat 3.
  • the upper end surface of the armature 8 is brought into contact with and separated from the lower end surface of the fixed iron core 2.
  • a chamfered portion 6 a is provided on the outer periphery of the ball 6.
  • a compression spring 9 is inserted into the fixed iron core 2 to press the needle pipe 7 in the direction in which the ball 6 is pressed against the valve seat 3.
  • An adjuster 10 for adjusting the load of the compression spring 9 is fixed in the fixed iron core 2.
  • a filter 11 is inserted into the upper end portion of the fixed iron core 2 serving as a fuel introduction portion.
  • the electromagnetic coil 12 is fixed to the outer periphery of the downstream end (the armature 8 side end) of the fixed iron core 2.
  • the electromagnetic coil 12 has a resin bobbin 13 and a coil body 14 wound around the outer periphery thereof.
  • a metal plate (magnetic circuit constituent member) 15 which is a yoke portion of the magnetic circuit is fixed by welding.
  • the magnetic pipe 1, the fixed iron core 2, the electromagnetic coil 12, and the metal plate 15 are integrally formed in a resin housing 16.
  • the resin housing 16 is provided with a connector portion 16a.
  • a terminal 17 that is electrically connected to the coil body 14 is drawn into the connector portion 16a.
  • FIG. 2 is an enlarged view of the valve seat 3, the nozzle hole plate 4 and the ball 6 of FIG. 1, and a plan view showing the central part of the nozzle hole plate 4 (the part exposed to the fuel flow path is indicated by the arrow II from the ball 6 side). It is a figure which combines and shows the figure seen along.
  • valve seat 3 a seat surface 3a on which the ball 6 is brought into contact with and separated from is provided.
  • the seat surface 3a is inclined so that its diameter is gradually reduced toward the downstream side.
  • a circular valve seat opening 3b facing the nozzle hole plate 4 is provided at the center of the downstream end of the valve seat 3 on the downstream side of the seat surface 3a.
  • the ball 6 is in contact with the seat surface 3a to prevent the fuel from flowing out from the valve seat opening 3b, and is separated from the seat surface 3a to allow the fuel to flow out from the valve seat opening 3b.
  • the nozzle hole plate 4 is arranged such that a virtual conical surface 18a that extends the sheet surface 3a downstream and an upstream end surface of the nozzle hole plate 4 intersect to form a virtual circle 18b.
  • Each nozzle hole 5 includes a nozzle hole body 5a and a large-diameter portion 5b adjacent to the downstream of the nozzle hole body 5a and constituting the outlet of the nozzle hole 5. That is, the nozzle hole main body 5a and the large diameter portion 5b are in a one-to-one correspondence. Further, the inlet portion of each nozzle hole main body 5 a is disposed on the valve seat axis 3 c side with respect to the valve seat opening 3 b which is the minimum inner diameter of the valve seat 3.
  • each large-diameter portion 5b has a cylindrical shape centered on an axis perpendicular to the nozzle hole plate 4 (parallel to the valve seat axis 3c). Furthermore, the diameter of each large diameter part 5b is larger than the diameter of the corresponding nozzle hole main body 5a.
  • a convex portion 4 c that is curved so as to protrude in the downstream side in parallel (or substantially in parallel) with the tip of the ball 6 is provided.
  • a flat nozzle hole plate flat portion 4d is provided around the convex portion 4c.
  • the nozzle hole 5 is provided in the nozzle hole plate flat part 4d.
  • FIG. 3 is an enlarged cross-sectional view showing a portion III in FIG. 2, and FIG. 4 is an enlarged plan view showing a portion IV in FIG.
  • the inlet center (center of the upstream end) 5c and outlet center (large diameter portion 5b) of the nozzle hole body 5a on the plane are shown.
  • the center of the side end portion 5d is arranged side by side on a radial straight line 19 passing through the valve seat axis 3c.
  • the outlet center 5d is disposed in a direction away from the valve seat axis 3c with respect to the inlet center 5c.
  • the nozzle hole main body 5a is inclined so as to advance radially outward of the nozzle hole plate 4 as it goes downstream.
  • the outlet center (center of the downstream end) 5e of the large diameter part 5b is the outlet center of the nozzle hole body 5a. It is located farther from the valve seat axis 3c than 5d and offset from the straight line 19 in the desired injection direction.
  • the armature 8 is sucked to the fixed iron core 2 side, and the armature 8, the needle pipe 7 and the ball 6, which are an integral structure, move upward in FIG. 1.
  • the fuel passes through the gap between the chamfered portion 6 a of the ball 6 and the valve seat 3 and passes through the nozzle hole 5. It is injected into the engine intake pipe.
  • the nozzle hole main body 5a when the nozzle hole main body 5a is projected perpendicularly to the plane, the nozzle hole main body 5a is directed in the radial direction about the valve seat axis 3c. The direction of the nozzle hole main body 5a faces the main flow 20a of the fuel in the plane described above.
  • the flow in which the liquid film of the fuel is thinly spread along the inner wall of the nozzle hole body 5a is further strengthened. Therefore, the fuel can be thinned efficiently and atomization can be promoted.
  • the fuel flows from the nozzle hole body 5a into the large diameter portion 5b, so that the liquid film is further thinned while changing the flow direction along the curvature of the inner wall of the large diameter portion 5b. Thereby, atomization can be further promoted.
  • Embodiment 1 when projected perpendicularly to the plane, the outlet center 5e of the large-diameter portion 5b is arranged farther from the valve seat axis 3c than the outlet center 5d of the nozzle hole body 5a. And offset with respect to the straight line 19 in the desired injection direction.
  • the length L is asymmetric with respect to the radial straight line 19
  • the L / d in the desired injection direction with respect to the radial straight line 19 is small, and the L / d in the opposite direction is large.
  • the fuel flow becomes as indicated by arrows 20d and 20e in FIG. 4, and fuel can be injected in a desired injection direction.
  • the injection direction can be optimized by adjusting the inner wall length L for each injection hole 5 by adjusting the axial length (depth) dimension L1 or the offset amount of the large diameter portion 5b. it can.
  • the dead volume is made small by arranging. For this reason, the injection amount of the initial spray having a large particle size can be reduced, and as shown in FIG. 5, the particle size of the entire spray including the initial spray and the steady spray can be reduced.
  • the dead volume is small, the amount of fuel evaporation in the dead volume during injection suspension under high temperature negative pressure is reduced, and the change in injection amount (static flow rate / dynamic flow rate) due to changes in temperature and atmospheric pressure is reduced. can do.
  • the fuel flow downstream from the seat surface 3a passes between the nozzle holes 5 in addition to the main flow 20a of the fuel flowing directly from the seat surface 3a to the inlet of the nozzle hole body 5a.
  • a fuel flow 20b is included. Further, the flow 20 b collides with the fuel flowing from the opposite side at the center of the nozzle hole plate 4, and becomes a U-turn flow 20 c toward the nozzle hole 5.
  • the convex portion 4c that is curved so as to protrude downstream in parallel to the tip portion of the ball 6 is provided at the center of the nozzle hole plate 4, as shown in FIG.
  • the flow 20c becomes a flow along the convex part 4c, and it is difficult to flow into the nozzle hole 5 provided in the nozzle hole plate flat part 4d outside the convex part 4c.
  • the main flow 20a of the fuel sinks under the U-turn flow 20c and easily collides with the upstream side of the inner wall of the nozzle hole main body 5a.
  • the effective length of the inner wall of the injection hole main body 5a necessary for expanding the liquid film can be increased, the fuel can be efficiently thinned, and atomization can be promoted.
  • valve seat shaft on the seat surface 3 a and the upstream end surface of the nozzle hole plate 4 while avoiding interference between the tip of the ball 6 and the nozzle hole plate 4 at the time of valve closing.
  • the distance from the vicinity of the center 3c can be shortened, and the virtual circle 18b can be enlarged.
  • the inlet center 5c of the nozzle hole body 5a arranged in the nozzle hole plate flat part 4d outside the convex part 4c can be arranged inside the virtual circle 18b, and along the inner wall of the nozzle hole body 5a.
  • the flow for spreading the liquid film can be further strengthened. Therefore, the fuel can be thinned efficiently and atomization can be promoted.
  • the dead volume can be further reduced while avoiding interference between the tip of the ball 6 and the nozzle hole plate 4 when the valve is closed, so that the injection amount of the initial spray having a large particle size can be further reduced, and the initial spray can be reduced. And the particle size of the entire spray combined with the steady spray can be further reduced.
  • FIG. 6 is a cross-sectional view of the valve seat 3, the injection hole plate 4 and the ball 6 of the fuel injection valve according to Embodiment 2 of the present invention, and a plan view showing the central portion of the injection hole plate 4 (in the fuel flow path).
  • FIG. 7 is an enlarged cross-sectional view of the VII portion of FIG. 6, and
  • FIG. 8 is a VIII portion of FIG. 6. It is a top view which expands and shows.
  • the convex portion 4c is provided at the center of the nozzle hole plate 4, but in the second embodiment, the center of the nozzle hole plate 4 is flat. Further, in the second embodiment, a flat portion 6 b parallel to (or substantially parallel to) the nozzle hole plate 4 is provided at the tip of the ball 6. The flat portion 6 b faces the center of the upstream end face of the nozzle hole plate 4. When projected perpendicularly to a plane orthogonal to the valve seat axis 3c, the flat portion 6b is provided on the inner diameter side of the inlets of all the nozzle hole main bodies 5a. Other configurations are the same as those in the first embodiment.
  • the speed of the U-turn flow 20c is also reduced, so that the U-turn flow 20c hardly flows into the nozzle hole 5.
  • the main flow 20a of the fuel can overcome the U-turn flow 20c and collide with the upstream side of the inner wall of the nozzle hole body 5a.
  • the effective length of the inner wall of the nozzle hole body 5a necessary for widening the liquid film can be increased, the fuel can be efficiently thinned, and atomization can be further promoted. .
  • the distance in the direction of the axis 3c can be shortened.
  • the virtual circle 18b can be enlarged and the inlet center 5c of the nozzle hole body 5a can be arranged inside the virtual circle 18b. Therefore, the flow for expanding the liquid film along the inner wall of the nozzle hole main body 5a is further strengthened, and the fuel can be effectively thinned and atomization can be promoted.
  • the dead volume can be further reduced while avoiding interference between the tip of the ball 6 and the nozzle hole plate 4 when the valve is closed.
  • the injection amount of the initial spray having a large particle size can be further reduced, and the particle size of the entire spray including the initial spray and the steady spray can be further reduced.
  • FIG. 9 is an enlarged sectional view showing the injection hole 5 of the fuel injection valve according to Embodiment 3 of the present invention.
  • a cylindrical portion 5f having a minimum cross-sectional area is provided between the inlet and the outlet of the nozzle hole body 5a.
  • Other configurations are the same as those in the first embodiment.
  • Embodiments 2 and 3 may be combined.
  • FIG. 10 is a cross-sectional view of the valve seat 3, the nozzle hole plate 4 and the ball 6 of the fuel injection valve according to Embodiment 4 of the present invention, and a plan view showing the central part of the nozzle hole plate 4 (in the fuel flow path).
  • FIG. 11 is an enlarged cross-sectional view of the XI portion of FIG. 10
  • FIG. 12 is a XII portion of FIG. 10. It is a top view which expands and shows.
  • the injection hole plate 4 of the fourth embodiment is configured by laminating a first injection hole plate 21 provided on the upstream side and a second injection hole plate 22 provided on the downstream side.
  • the first nozzle hole plate 21 has a thick portion 21a and a thin portion 21b that is located in the center of the thick portion 21a and has a smaller thickness than the thick portion 21a.
  • the thin portion 21b is provided in a portion facing the inner side (the valve seat axis 3c side) of the valve seat opening 3b, that is, a portion in contact with the fuel.
  • the thin portion 21b is formed by pressing and denting the upstream end face of the first nozzle hole plate 21 to the downstream side.
  • a tapered portion 21c is formed between the thin portion 21b and the thick portion 21a.
  • a plurality of positioning holes 21d are press-molded in the thick portion 21a.
  • the second injection hole plate 22 is press-molded with a half punched portion 22a fitted into the positioning hole 21d.
  • the second injection hole plate 22 is positioned with respect to the first injection hole plate 21 by fitting the half punching portion 22a into the positioning hole 21d.
  • Other configurations are the same as those in the second embodiment.
  • the large diameter part 5b is forged, so there is a limit in the size and depth of the large diameter part 5b, and the fuel There is a limit to the direction in which the liquid film pops out.
  • Embodiment 4 since the nozzle hole plate 4 has a stacked structure of the first nozzle hole plate 21 and the second nozzle hole plate 22, the second nozzle hole plate 22 has a large diameter.
  • the part 5b can be formed by press punching. For this reason, the depth of the large diameter portion 5b can be easily changed by changing the thickness of the second injection hole plate 22. Thereby, the freedom degree of the magnitude
  • the large-diameter portion 5b is provided in the second nozzle plate 22 by press punching. Thereafter, the first nozzle hole plate 21 and the second nozzle hole plate 22 are stacked in a state of being aligned. Then, from the downstream side of the second nozzle hole plate 22, a part of the inner wall of the large-diameter portion 5 b is extracted while being punched so as to penetrate to the upstream side of the first nozzle hole plate 21.
  • the nozzle hole main body 5 a is provided in the first and second nozzle hole plates 21 and 22. Thereby, position shift with the corresponding nozzle hole main body 5a and the large diameter part 5b can be suppressed.
  • a method of progressively pressing a belt-like hoop material is used in order to accurately process at low cost.
  • a pilot hole for positioning with a press mold is provided in the band-shaped hoop material, and the injection hole main body 5a and the large diameter portion 5b are press-molded with reference to the pilot hole. The positional accuracy of the large diameter portion 5b is ensured.
  • a positioning hole 21d is press-molded in the first nozzle hole plate 21 with the pilot hole as a reference, and a half punching portion 22a protruding upstream is pressed in the second nozzle hole plate 22. Mold.
  • the nozzle hole body 5a and the positioning hole 21d are processed with the same pilot hole as a reference, the large diameter portion 5b and the half punched portion 22a are processed with the same pilot hole as a reference, and further positioning is performed. It is also possible to press-fit the half punched portion 22a into the hole 21d. Thereby, the positioning accuracy of the 1st nozzle hole plate 21 and the 2nd nozzle hole plate 22 can be improved, and the dispersion
  • first injection hole plate 21 and the second injection hole plate 22 can be joined in a stacked state by press-fitting and fitting the half punched portion 22a into the positioning hole 21d within the pressing process. Therefore, the manufacturing cost can be reduced as compared with the case where the nozzle hole plates 21 and 22 are welded and aligned.
  • the fuel is discharged to the outside. It has a structure that does not leak.
  • the thickness of the nozzle holes 21 and 22 is thicker.
  • the injection hole main body 5a is processed while the first and second injection hole plates 21 and 22 are stacked, while a part 5g of the inner wall of the large-diameter portion 5b is extracted by press punching. It is necessary to penetrate to the upstream side of the nozzle hole plate 21. For this reason, considering the ease of press punching, it is desirable that the first nozzle hole plate 21 is thin.
  • the thin hole portion 21b is provided in the first nozzle hole plate 21, and the inlet of the nozzle hole body 5a is provided in the thin wall portion 21b.
  • the thickness of the hoop material of the first nozzle hole plate 21 can be increased, and the punching ability of the nozzle hole body 5a to be pressed into the thin wall portion 21b is improved while preventing a process failure in the progressive feeding. be able to.
  • the flat portion 6b may not be provided on the ball 6 of the fourth embodiment, and the convex portion 4c may be provided at the center of the nozzle hole plate 4. That is, Embodiments 1 and 4 may be combined.
  • the positioning hole 21d is provided in the first injection hole plate 21 and the half punching portion 22a is provided in the second injection hole plate 22.
  • the reverse may be possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
PCT/JP2013/083368 2013-04-16 2013-12-12 燃料噴射弁 WO2014171038A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380075715.7A CN105121834B (zh) 2013-04-16 2013-12-12 燃料喷射阀
PH12015502333A PH12015502333A1 (en) 2013-04-16 2015-10-08 Fuel injection valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013085541A JP5748796B2 (ja) 2013-04-16 2013-04-16 燃料噴射弁
JP2013-085541 2013-04-16

Publications (1)

Publication Number Publication Date
WO2014171038A1 true WO2014171038A1 (ja) 2014-10-23

Family

ID=51731005

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/083368 WO2014171038A1 (ja) 2013-04-16 2013-12-12 燃料噴射弁

Country Status (4)

Country Link
JP (1) JP5748796B2 (zh)
CN (1) CN105121834B (zh)
PH (1) PH12015502333A1 (zh)
WO (1) WO2014171038A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015225342A1 (de) * 2015-12-15 2017-06-22 Robert Bosch Gmbh Spritzlochscheibe und Ventil
JP6668079B2 (ja) * 2016-01-12 2020-03-18 日立オートモティブシステムズ株式会社 燃料噴射装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012255386A (ja) * 2011-06-09 2012-12-27 Mitsubishi Electric Corp 燃料噴射弁
JP2013007316A (ja) * 2011-06-24 2013-01-10 Mitsubishi Electric Corp 燃料噴射弁

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10281040A (ja) * 1997-04-09 1998-10-20 Toyota Motor Corp 燃料噴射弁
JP2001317431A (ja) * 2000-02-25 2001-11-16 Denso Corp 流体噴射ノズル
JP4097056B2 (ja) * 2000-03-17 2008-06-04 株式会社デンソー 燃料噴射弁
DE10059007A1 (de) * 2000-11-28 2002-05-29 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3759918B2 (ja) * 2002-10-16 2006-03-29 三菱電機株式会社 燃料噴射弁
JP3977728B2 (ja) * 2002-11-18 2007-09-19 三菱電機株式会社 燃料噴射弁
JP4209803B2 (ja) * 2004-04-19 2009-01-14 三菱電機株式会社 燃料噴射弁
US7185831B2 (en) * 2004-11-05 2007-03-06 Ford Motor Company Low pressure fuel injector nozzle
JP4306656B2 (ja) * 2005-08-01 2009-08-05 株式会社日立製作所 燃料噴射弁
JP4129018B2 (ja) * 2005-09-30 2008-07-30 三菱電機株式会社 燃料噴射弁
JP2008014216A (ja) * 2006-07-05 2008-01-24 Toyota Motor Corp 燃料噴射弁
DE102006041472A1 (de) * 2006-09-05 2008-03-06 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4510091B2 (ja) * 2007-03-27 2010-07-21 三菱電機株式会社 燃料噴射弁
JP4808801B2 (ja) * 2009-05-18 2011-11-02 三菱電機株式会社 燃料噴射弁
JP5161853B2 (ja) * 2009-09-29 2013-03-13 三菱電機株式会社 燃料噴射弁
JP4757947B2 (ja) * 2010-03-19 2011-08-24 三菱電機株式会社 燃料噴射弁
JP5134063B2 (ja) * 2010-11-01 2013-01-30 三菱電機株式会社 燃料噴射弁
JP5295316B2 (ja) * 2011-06-22 2013-09-18 三菱電機株式会社 流体噴射弁による噴霧生成方法、流体噴射弁及び噴霧生成装置
WO2013011584A1 (ja) * 2011-07-21 2013-01-24 トヨタ自動車株式会社 燃料噴射弁

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012255386A (ja) * 2011-06-09 2012-12-27 Mitsubishi Electric Corp 燃料噴射弁
JP2013007316A (ja) * 2011-06-24 2013-01-10 Mitsubishi Electric Corp 燃料噴射弁

Also Published As

Publication number Publication date
CN105121834A (zh) 2015-12-02
PH12015502333B1 (en) 2016-02-22
JP2014208974A (ja) 2014-11-06
JP5748796B2 (ja) 2015-07-15
PH12015502333A1 (en) 2016-02-22
CN105121834B (zh) 2017-11-24

Similar Documents

Publication Publication Date Title
JP4808801B2 (ja) 燃料噴射弁
US8302886B2 (en) Fuel injection valve
JP5855270B2 (ja) 燃料噴射弁
US8967500B2 (en) Fuel injection valve
EP2108811B1 (en) Fuel injection valve
US8919675B2 (en) Fuel injection valve
JP5185973B2 (ja) 燃料噴射弁
JP5893110B1 (ja) 燃料噴射弁
JP5134063B2 (ja) 燃料噴射弁
JP5748796B2 (ja) 燃料噴射弁
JP2015078603A (ja) 燃料噴射弁
JPWO2018198309A1 (ja) 燃料噴射弁
WO2021075041A1 (ja) 燃料噴射弁
JP5901844B2 (ja) 燃料噴射弁
JP6190917B1 (ja) 燃料噴射弁
CN113260783B (zh) 燃料喷射装置
JP5766317B1 (ja) 燃料噴射弁
JP6735913B2 (ja) 燃料噴射弁
JP6644164B2 (ja) 燃料噴射弁および噴射流量の調整方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13882360

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 12015502333

Country of ref document: PH

WWE Wipo information: entry into national phase

Ref document number: IDP00201506445

Country of ref document: ID

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13882360

Country of ref document: EP

Kind code of ref document: A1