PH12015502333B1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- PH12015502333B1 PH12015502333B1 PH12015502333A PH12015502333A PH12015502333B1 PH 12015502333 B1 PH12015502333 B1 PH 12015502333B1 PH 12015502333 A PH12015502333 A PH 12015502333A PH 12015502333 A PH12015502333 A PH 12015502333A PH 12015502333 B1 PH12015502333 B1 PH 12015502333B1
- Authority
- PH
- Philippines
- Prior art keywords
- injection hole
- injection
- hole plate
- valve seat
- disposed
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 306
- 239000007924 injection Substances 0.000 title claims abstract description 306
- 239000000446 fuel Substances 0.000 title claims abstract description 111
- 239000007921 spray Substances 0.000 claims description 29
- 238000011144 upstream manufacturing Methods 0.000 claims description 22
- 238000004080 punching Methods 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 description 24
- 239000010408 film Substances 0.000 description 20
- 238000000889 atomisation Methods 0.000 description 17
- 239000007788 liquid Substances 0.000 description 15
- 239000002245 particle Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000750 progressive effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 241000507564 Aplanes Species 0.000 description 1
- 101150107341 RERE gene Proteins 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
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- 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
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)
Abstract
In a fuel injection valve, injection holes each include: an injection hole main body and a large-diameter portion that is adjacent downstream from the injection hole body and which constitutes the outlet of the injection hole main body and that constitutes an outlet of the injection hole. When the injection holes are projected perpendicularly onto a plane that is perpendicular to a valve seat central axis, inlet centers and outlet centers of the injection hole main bodies in the plane are respectively disposed so as to line up on radial straight lines that pass through the valve seat central axis, and the outlet centers are disposed further away from the valve seat central axis than the inlet centers. Inner wall lengths of injection holes on a side of the injection hole main bodies near the valve seat central axis are made asymmetric relative to the straight lines by offsetting centers of the large diameter portions relative to the straight lines.
Description
diameter thereof is gradually reduced downstream. A circular valve seat opening 3b that faces the injection hole plate 4 is also disposed centrally on the downstream end portion of the valve seat 3 at a downstream end of the seat surface 3a.
The ball 6 is placed in contact with the seat surface 3a to stop outflow of fuel from the valve seat opening 3b, and is separated from the seat surface 3a to allow outflow of fuel from the valve seat opening 3b. The injection hole plate 4 is disposed such that an imaginary circular conical surface 18a that is a downstream extension of the seat surface 3a and an upstream end surface of the injection hole plate 4 intersect to form an imaginary circle 18b.
Each of the injection holes 5 includes: an injection hole main body 5a; { and a large diameter portion 5b that is adjacent downstream from the injection hole main body 5a and that forms part of an outlet of the injection hole 5. In other words, the injection hole main bodies 5a and the large diameter portions 5b have one-to-one correspondence. The inlet portions of each of the injection hole main bodies 5a are disposed nearer to a valve seat central axis 3c than the valve seat opening 3b, where an inside diameter of the valve seat 3 is smallest.
In addition, each of the large diameter portions 5b is a cylinder that is centered around an axis that is perpendicular to an injection hole plate 4 (parallel to a valve seat central axis 3c). Furthermore, a diameter of each of { the large diameter portions 5b is larger than a diameter of the corresponding injection hole main body 5a.
A convex portion 4c that is curved to protrude downstream parallel (or approximately parallel) to a tip end portion of the ball 6 is disposed centrally on the injection hole plate 4. An injection hole plate flat portion 4d is disposed around the convex portion 4c. The injection holes 5 are disposed on the . injection hole plate flat portion 4d.
Figure 3 is a cross section that shows Portion Ill from Figure 2 enlarged, and Figure 4 is a plan that shows Portion IV from Figure 2 enlarged. When the respective injection holes 5 are projected vertically onto a plane that is t Coa s perpendicular to the valve seat central axis 3c, inlet centers 5¢ (centers of upstream end portions) of the injection hole main bodies 5a and outlet centers 5d (centers of end portions near the large diameter portions 5b) in the plane are disposed so as to line up on radial straight lines 19 that pass through the valve seat central axis 3c. Furthermore, the outlet centers 5d are disposed further away from the valve seat central axis 3c than the inlet centers 5c.
In other words, the injection hole main bodies 5a are inclined so as to be positioned further outward in a radial direction of the injection hole plate 4 progressively downstream.
When the respective injection holes 5 are projected vertically onto a plane that is perpendicular to the valve seat central axis 3c, outlet centers Se { (centers of downstream end portions) of the large diameter portions 5b are disposed so as to be further away from the valve seat central axis 3c than the outlet centers 5d of the injection hole main bodies 5a and so as to be offset in desired directions of spraying relative to the straight lines 19.
Next, operation of the fuel injection valve will be explained. When an actuating signal is sent by an engine controlling apparatus to a fuel injection valve driving circuit, an electric current is made to flow to the electromagnetic coil 12 through the terminals 17 such that magnetic flux arises in a magnetic circuit that is constituted by the armature 8, the fixed core 2, the metal sheet 15, and the magnetic pipe 1. {
Thus, the armature 8 is attracted toward the fixed core 2, making the armature 8, the needle pipe 7, and the ball 6, which constitute an integrated construction, move upward in Figure 1. Then, when the ball 6 separates from the valve seat 3 to form a gap between the ball 6 and the valve seat 3, fuel passes through the gaps between the chamfered portions 6a of the ball 6 and the valve seat 3, and is sprayed from the injection holes 5 into an engine air intake pipe.
Next, when an operation stopping signal is sent by the engine controlling apparatus to the fuel injection valve driving circuit, the passage of electric current to the electromagnetic coil 12 is stopped, magnetic flux in the magnetic circuit is reduced, and the armature 8, the needle pipe 7, and the ball 6 move downward in Figure 1 due to the spring force from the compression spring 9. Thus, the gap between the ball 6 and the valve seat 3 is closed, completing fuel injection.
When fuel flow that moves toward inlets of the respective injection holes 5 is projected vertically onto a plane that is perpendicular to the valve seat central axis 3c, a main flow of the fuel flow that moves directly from the seat surface 3a toward the inlet centers 5c of the injection hole main bodies 5a forms a flow 20a that moves toward the valve seat central axis 3c, as shown in the plan in Figure 2.
When the injection hole main bodies 5a are projected perpendicularly ( onto the above-mentioned plane, the injection hole main bodies 5a are oriented radially around the valve seat central axis 3c. The directions of the injection - hole main bodies 5a face the main flow 20a of the fuel directly in the above-mentioned plane.
Thus, the fuel collides with the injection hole main bodies 5a, and then the flows in which the liquid films of fuel are spread thinly over the inner walls of : the injection hole main bodies 5a are further intensified. Consequently, the fuel can be formed into films efficiently, enabling atomization to be promoted.
In addition, when the fuel flows from the injection hole main bodies 5a i into the large diameter portions 5b, the liquid films are spread even more thinly as the direction of flow is changed parallel to the curvature of the inner walls of the large diameter portions 5b. Atomization can thereby be further promoted.
Still furthermore, as the liquid films of fuel that spread out over the inner walls of the injection holes 5 on sides near the valve seat central axis 3c move downstream, the direction of flow is changed parallel to the curvature of the inner walls of the injection holes 5. Because of that, targeted individual spraying angles (= the angle of spread of spray mist that is sprayed from a single injection hole 5) can be achieved by adjusting a ratio (hereinafter "L/d") of an inner wall length L of the injection hole main body 5a on a side near the valve seat central axis 3c to a diameter d of the injection hole main body 5a.
t a ‘ .
Specifically, the individual spraying angles can be increased if L/d is reduced, and the individual spraying angles can be reduced if L/d is increased.
In Embodiment 1, when projected vertically onto the above-mentioned plane, the outlet centers 5e of the large diameter portions 5b are disposed so as to be further away from the valve seat central axis 3c than the outlet centers 5d of the injection hole main bodies 5a and are offset in a desired direction of spraying relative to the straight lines 19. : Because of that, the lengths L are asymmetric relative to the radial straight lines 19, L/d in the desired direction of spraying being reduced relative to the radial straight lines 19, and L/d in the opposite direction being increased.
Thus, the fuel flow is as indicated by the arrows 20d and 20e in Figure 4, { enabling the fuel to be sprayed in the desired directions of spraying.
The directions of spraying can be optimized by adjusting the inner wall : length L for each of the respective injection holes 5 by adjusting an axial length (depth) dimension L1 or amount of offset of the large diameter portions 5b. .
At the commencement of spraying, because fuel inside a space (a dead volume) that is surrounded by the inner walls of the valve seat 3 downstream from the seat surface 3a, the upstream end surface of the injection hole plate 4, and the tip end portion of the ball 6 is discharged from the injection holes 5, spraying velocity is reduced compared to during steady spraying after completion of the valve opening operation of the ball 6, and because of that, there is a tendency for sprayed particle diameter to be larger in the initial spray at the commencement of spraying than during steady spraying. in answer to that, in Embodiment 1, dead volume is reduced by disposing the injection hole plate 4 such that an imaginary circular conical surface 18a that is a downstream extension of the seat surface 3a and an upstream end surface of the injection hole plate 4 intersect to form an imaginary circle 18b. Because of that, the amount of spraying of initial spray that has a larger particle size is reduced, enabling the overall sprayed particle diameter of initial spray and steady spray combined to be reduced, as shown in Figure 5.
Because the dead volume is reduced, the amount of fuel evaporation inside the dead volume under high temperature and negative pressure during cessation of spraying is also reduced, enabling changes in the amount of spraying (the amount of static flow and the amount of dynamic flow) that accompany changes in temperature and ambient pressure to be reduced.
In addition, as shown in the plan in Figure 2, a flow 20b of fuel that passes through between the injection holes 5 is included in the fuel flow downstream from the seat surface 3a, in addition to the main flow 20a of fuel that flows directly from the seat surface 3a into the inlets of the injection hole main bodies 5a. The flow 20b collides at a central portion of the injection hole plate 4 with the fuel that has flowed from the opposite side, forming a U-turn flow 20c toward the injection holes 5. (
In Embodiment 1, because a convex portion 4c that is curved to protrude downstream parallel to a tip end portion of the ball 6 is disposed centrally on the injection hole plate 4, as shown in Figure 3, the U-turn flow 20c is a flow along the convex portion 4c, making it less likely to flow into the injection holes 5 that are disposed on the injection hole plate flat portion 4d outside the convex portion 4c.
The main flow 20a of fuel, on the other hand, slides in under the U-turn flow 20c, and becomes more likely to collide with upstream ends of the inner walls of the injection hole main bodies 5a. Thus, effective lengths of the inner { walls of the injection hole main bodies 5a that are necessary to spread the liquid films out can be increased, enabling the fuel to be formed into films efficiently, thereby enabling atomization to be promoted.
As shown in the cross section in Figure 2, a distance between the seat surface 3a and the upstream end surface of the injection hole plate 4 in a vicinity of the valve seat central axis 3c can also be shortened while avoiding interference between the tip end portion of the ball 6 and the injection hole plate 4 when the valve is closed, enabling the imaginary circle 18b to be enlarged.
Thus, the inlet centers 5c of the injection hole main bodies 5a that are disposed on the injection hole plate flat portion 4d outside the convex portion 4c can be disposed inside the imaginary circle 18b, enabling the flow that promotes spreading out of liquid films over the inner walls of the injection hole main bodies 5a to be strengthened. Consequently, the fuel can be formed into films efficiently, enabling atomization to be promoted.
In addition, because the above-mentioned dead volume can be further reduced while avoiding interference between the tip end portion of the ball 6 and the injection hole plate 4 when the valve is closed, the amount of spraying of initial spray that has a larger particle size is further reduced, enabling the overall sprayed particle diameter of initial spray and steady spray combined to be further reduced. ( - Embodiment 2
Next, Figure 6 is a diagram that combines a cross section of a valve seat 3, an injection hole plate 4, and a ball 6 of a fuel injection valve according to Embodiment 2 of the present invention and a plan (a view of a portion that is 2% exposed to a fuel flow channel from a side near the ball 6 in the direction of arrow VI) that shows a central portion of an injection hole plate, Figure 7 is a cross section that shows Portion VII from Figure 6 enlarged, and Figure 8 is a plan that shows Portion VIII from Figure 6 enlarged.
In Embodiment 1, the convex portion 4c is disposed centrally on the 2u injection hole plate 4, but in Embodiment 2, a center of the injection hole plate 4 is flat. In Embodiment 2, a flat portion 6b that is parallel (or approximately parallel) to the injection hole plate 4 is disposed on a tip end portion of the bali 6. ‘The flat portion 6b faces an upstream end surface of the injection hole plate 4 centrally. When projected vertically onto a plane that is perpendicular to the valve seat central axis 3c, the flat portion 6b is disposed radially further inward than inlets of all of the injection hole main bodies 5. The rest of the configuration is similar or identical to that of Embodiment 1.
In the plan in Figure 6, the flow channel cross-sectional area of the flow 20b of fuel that passes between the injection holes 5 and moves toward the center of the injection hole plate 4 reduces rapidly when the portion that faces 50 the flat portion 6b is transited. Because of that, pressure loss is increased,
and the velocity of the flow 20b decreases in the portion that faces the flat portion 6b.
Because the velocity of U-turn flow 20c also decreases therewith,
U-turn flow 20c is less likely to flow into the injection holes 5. Because of that, the main flow 20a of the fuel overcomes the U-turn flow 20c at the inlets of the injection hole main bodies 5a, and is able to collide with upstream ends of the inner walls of the injection hole main bodies 5a, as shown in Figure 7.
Thus, effective lengths of the inner walls of the injection hole main bodies 5a that are necessary to spread the liquid films out can be increased, : 10 enabling the fuel to be formed into films efficiently, thereby enabling atomization to be further promoted. {
As shown in the cross section in Figure 6, a distance between the seat surface 3a and the upstream end surface of the injection hole plate 4 in a direction of the valve seat central axis 3c can also be shortened while avoiding interference between the tip end portion of the ball 6 and the injection hole plate 4 when the valve is closed. The imaginary circle 18b can thereby be enlarged, . enabling the inlet centers 5c of the injection hole main bodies 5a to be disposed inside the imaginary circle 18b. Consequently, the flow that promotes spreading out of liquid films over the inner walls of the injection hole main bodies 5a can be strengthened, thereby also enabling the fuel to be formed into films efficiently, and enabling atomization to be promoted.
In addition, the above-mentioned dead volume can be further reduced while avoiding interference between the tip end portion of the ball 6 and the injection hole plate 4 when the valve is closed. The amount of spraying of initial spray that has a larger particle size is thereby further reduced, enabling : the overall sprayed particle diameter of initial spray and steady spray combined to be further reduced.
Embodiment 3
Next, Figure 9 is a cross section that shows an injection hole of a fuel injection valve according to Embodiment 3 of the present invention enlarged.
In Embodiment 3, cylindrical portions 5f that have smallest cross-sectional areas between the inlets and outlets of the injection hole main bodies 5a are disposed in flow channels of injection hole main bodies 5a. The rest of the configuration is similar or identical to that of Embodiment 1.
In a fuel injection valve of this kind, because the fuel flow rate in the injection holes 5 is determined by the cross-sectional area of the cylindrical portions 5f, irregularities in flow rate due to irregularities in position between the injection hole main bodies 5a and the large diameter portions 5b can be suppressed.
Moreover, cylindrical portions 5f may be disposed on the injection hole { main bodies 5a of Embodiment 2. In other words, Embodiments 2 and 3 may be combined.
Embodiment 4
Next, Figure 10 is a diagram that combines a cross section of a valve . 15 seat 3, an injection hole plate 4, and a ball 6 of a fuel injection valve according to Embodiment 4 of the present invention and a plan (a view of a portion that is exposed to a fuel flow channel from a side near the ball 6 in the direction of arrow X) that shows a central portion of an injection hole plate, Figure 11 is a cross section that shows Portion XI from Figure 10 enlarged, and Figure 12 is a { 20 plan that shows Portion XII from Figure 10 enlarged.
The injection hole plate 4 according to Embodiment 4 is configured by laminating a first injection hole plate 21 that is disposed on an upstream side and a downstream second injection hole plate 22 that is disposed on an downstream side. 25 = The first injection hole plate 21 has: a thick portion 21a; and a thin portion 21b that is positioned centrally on the thick portion 21a and that has a smaller thickness dimension than the thick portion 21a. The thin portion 21b is disposed on a portion that faces inside the valve seat opening 3b (near the valve seat central axis 3c), i.e., a portion that contacts the fuel.
The thin portion 21b is formed by pressing the upstream end surface of the first injection hole plate 21 downstream to make a hollow. A tapered portion 21c¢ is formed between the thin portion 21b and the thick portion 21a.
A plurality of positioning apertures 21d are press-formed into the thick portion 21a. Half-blanked portions 22a that are fitted together with the
I positioning apertures 21d are press-formed into the second injection hole plate 22. The second injection hole plate 22 is positioned relative to the first injection hole plate 21 by fitting the half-blanked portions 22a into the positioning apertures 21d. The rest of the configuration is similar or identical to that of Embodiment 2. ( If the injection hole main bodies 5a and the large diameter portions 5b are press-formed on a single injection hole plate, then there is a limit to the size and depth of the large diameter portions 5b because the large diameter portions 5b are press-forged, and therefore there is a limit to the directions that the liquid films of fuel can be ejected.
In answer to that, in Embodiment 4, because the injection hole plate 4 has a laminated structure that includes a first injection hole plate 21 and a second injection hole plate 22, the large diameter portions 5b can be formed on the second injection hole plate 22 by punching. Because of that, depth of the oo large diameter portions 5b can be easily changed by changing a plate thickness of the second injection hole plate 22. Freedom of size and depth of the large
Co diameter portions 5b is thereby improved, enabling the liquid films of fuel to be ejected in the desired directions of spraying.
Specific methods for disposing the injection holes 5 on the first and second injection hole plates 21 and 22 include first disposing large diameter portions 5b on the second injection hole plate 22 by punching. Next, the first injection hole plate 21 and the second injection hole plate 22 are laminated in a positioned state. Then, the injection hole main bodies 5a are disposed on the first and second injection hole plates 21 and 22 by press-punching so as to pass through from a downstream side of the second injection hole plate 22 to an upstream side of the first injection hole plate 21 while punching out a portion of the inner walls of the large diameter portions 5b. Thus, misalignments between the respective corresponding injection hole main bodies 5a and the large diameter portions 5b can be suppressed.
Here, methods in which a strip-shaped hoop material is fed and : 5 pressed progressively can be used as methods for machining the first and second injection hole plates 21 and 22 in order to machine precisely at reduced cost. In that case, positioning accuracy of the injection hole main bodies 5a and the large diameter portions 5b is ensured by disposing pilot apertures for positioning relative to the pressing die on the strip-shaped hoop material, and press-forming the injection hole main bodies 5a and the large diameter portions 5b relative to these pilot apertures. ( In Embodiment 4, the positioning apertures 21d are press-formed on the first injection hole plate 21, and the half-blanked portions 22a that protrude toward the upstream side are press-formed onto the second injection hole plate 22, using the above-mentioned pilot apertures as references.
Thus, the injection hole main bodies 5a and the positioning apertures 21d are machined using identical pilot apertures as references, the large diameter portions 5b and the half-blanked portions 22a are machined using identical pilot apertures as references, and in addition they can also be fitted 200 together by press-fitting the half-blanked portions 22a into the positioning apertures 21d. Positioning accuracy between the first injection hole plate 21 { and the second injection hole plate 22 is improved thereby, enabling irregularities in spray shape to be reduced.
Furthermore, because the first injection hole plate 21 and the second injection hole plate 22 can be joined in a laminated state by fitting them together by press-fitting the half-blanked portions 22a into the positioning apertures 21d during a pressing step, manufacturing costs can be reduced compared to if they were positioned by welding together the injection hole plate 21 and 22.
In addition, in Embodiment 4, because the first welded portion 4a is disposed nearer to the valve seat central axis 3c than the positioning interfitting
. eT . portions (the positioning apertures 21d and the half-blanked portions 22a), the construction is such that fuel does not leak externally.
When the first and second injection hole plates 21 and 22 are machined using a progressive feeding and pressing method, if the plate thicknesses of the injection hole plates 21 and 22, i.e., the sheet thicknesses of the hoop material, are thin, then there may be insufficient rigidity, and one problem has been that wrinkles form in the hoop material as the hoop material is fed progressively, preventing progressive feeding to the correct position, and giving rise to processing problems, making it desirable for the plate thicknesses of the injection hole plates 21 and 22 to be thick.
Inthe machining of the injection hole main bodies 5a by punching, on ( the other hand, it is necessary to pass through to an upstream side of the first injection hole plate 21 with the first and second injection hole plates 21 and 22 in a laminated state, while punching out portions 5g of the inner walls of the large diameter portions 5b. Because of that, when consideration is given to ease of punching, it is desirable for the plate thickness of the first injection hole plate 21 to be thinner.
In answer to that, in Embodiment 4, the thin portion 21b is disposed on the first injection hole plate 21, and the inlets of the injection hole main bodies 5a are disposed on the thin portion 21b. Because of that, the plate thickness of the hoop material of the first injection hole plate 21 can be increased, { enabling the punchability of the injection hole main bodies 5a that are pressed into the thin portion 21b to be improved while preventing processing problems in the progressive feed.
Moreover, a convex portion 4c may be disposed centrally on an injection hole plate 4 without disposing the flat portion 6b on the ball 6 according to Embodiment 4. In other words, Embodiments 1 and 4 may be combined. in Embodiment 4, the positioning apertures 21d are disposed on the first injection hole plate 21, and the half-blanked portions 22a are disposed on : the second injection hole plate 22, but that may also be reversed.
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1. A fuel injection valve comprising: a valve seat including: a seat surface that is inclined such that a diameter-.is gradually reduced downstream; and To ~. a valve seat opening that is disposed downstream from the seat surface; a valve body that is placed in contact with the seat surface to stop - outflow of fuel from the valve seat opening, and that is separated from the seat surface to allow outflow of fuel from the valve seat opening; and 10. an injection hole plate that is fixed to a downstream end surface of the valve seat, and that includes a plurality of injection holes that externally spray fuel that flows out of the valve seat opening, oo oo wherein: the injection hole plate is disposed such that an imaginary circular conical surface that is a downstream extension of the seat surface and an upstream end surface of the injection hole plate intersect to form an imaginary : circle; : : oo the injection holes comprise: an injection hole main body; and Co : a large diameter portion that is adjacent downstream from the injection hole main body, and that constitutes an outlet of the injection hole; - a diameter of the large diameter portions is greater than a diameter of the injection hole main bodies; an inlet portion of the injection hole main bodies is disposed nearer to a valve seat central axis than the valve seat opening, where a diameter is smallest in the valve seat; when the injection holes are projected perpendicularly onto a plane that is perpendicular to the valve seat central axis, inlet centers and outlet centers of the injection hole main bodies in the plane are respectively disposed so as to line up on radial straight lines that pass through the valve seat central axis, and the outlet centers are disposed further away from the valve seat central axis than the inlet centers; and Co inner wall lengths of injection holes on a side of the injection hole main bodies near the valve seat central axis are made asymmetric relative to the pecensy PROPERTY of race
FUEL INJECTION VALVE mrs bron
TECHNICAL FIELD | Co ~The present invention relates to a fuel injection valve that is used to. supply fuel to an internal combustion engine of an automobile, etc., and particularly relates to a fuel injection valve that aims to achieve both atomization: promotion and improvements in spraying direction freedom: in spraying characteristics. | :
BACKGROUND ART oo | oo - In recent years, as fuel consumption restrictions and exhaust emission regulations for automobiles, etc., are augmented, there is demand for atomization of fuel sprays that are sprayed from fuel injection valves. Because of that, in conventional fuel injection valves, injection hole inlets are disposed on an inner side of a main flow of fuel flow from a seat portion of a valve seat, - and a cavity flow channel area directly above injection holes is reduced rapidly. :
Fuel flow that has a greater entry angle at the injection hole inlets is thereby oe 16 promoted, enabling atomization of fuel spray (see Patent Literature 1, for example). : So
In other conventional fuel injection valves, injection hole lengths on a radially inner side relative to a fuel injection valve central axis are made shorter : ‘than injection hole lengths on a radially outer side. Atomization of fuel spray is thereby enabled using a simple ‘construction (see Patent Literature 2, for oo example). : | oo
PATENT LITERATURE
[Patent Literature 1] | | :
Japanese Patent Laid-Open No. 2007-100515 (Gazette) : [Patent Literature 2] :
Ey ———————— Pree rere ro,
Japanese Patent Laid-Open No. 2004-137931 (Gazette)
In gasoline internal combustion engines in automobiles in recent years, 5° one fuel injection valve has been mounted per cylinder in order to improve : controllability of fuel supply to cylinders. Furthermore, in order to achieve both improvements in output and improvements in fuel economy, two air intake ports are disposed per cylinder in most cases, and in fuel injection valves in such cases, fuel is required to be sprayed toward the respective air intake ports bidirectionally. { In the fuel injection valve that is disclosed in Patent Literature 1, in order to spray the fuel bidirectionally, it is necessary for injection holes that are disposed on an injection hole plate to have injection hole directions that form a bidirectional cluster spray using a plurality of injection holes. However, if the injection holes are disposed so as to leave a wide spacing therebetween, because the orientations of the injection holes projected perpendicularly onto a plane that is perpendicular to a valve seat central axis have predetermined angles relative to directions of radiation from the valve seat central axis, the injection hole directions do not face the main flow of the fuel flow directly when the main flow of the fuel flow from the seat portion of the valve seat toward the injection hole inlets is projected perpendicularly onto the above-mentioned ( plane.
Because of that, flows that start to spread liquid films over.inner walls of the injection holes are not formed sufficiently after the fuel collides with the inner walls of the injection holes, and one problem has been that the fuel cannot form the liquid films efficiently, making it difficult to atomize the spray.
If, on the other hand, the injection hole directions are oriented in radial directions such that the injection hole directions face the main flow of the fuel flow directly in order to spread the liquid fuel film over the inner walls of the injection holes efficiently in the above-mentioned plane, then it is necessary to arrange the injection holes so as to be offset toward the respective cluster c= , sprays in order to form a bidirectional cluster spray using a plurality of injection holes. However, in arrangements of that kind, the injection holes are closer together, and one problem has been that the liquid films interfere with each other at a stage of the liquid films immediately after being ejected before being broken up into spray mist, making atomization deteriorate. The influence thereof has been particularly pronounced in specifications with large flows or specifications that are aimed at atomized spray because there are large - numbers of injection holes.
Furthermore, by disposing the injection holes so as to be offset in the direction of the respective cluster sprays, side streams from the seat portion of ~ the valve seat where injection holes are not disposed on radial straight lines from the valve seat central axis toward the injection hole inlets, and U-turn flows ( that approach the injection hole inlets after first reaching the valve seat central axis, become stronger in injection holes at ends of the injection hole groups than the main flow of the fuel flow from the seat portion of the valve seat toward the injection hole inlet. Because of that, formation of thin films of fuel is obstructed, making atomization poor, and one problem has been that spraying direction freedom and atomization cannot both be achieved.
In addition, in the conventional fuel injection valve that is disclosed in
Patent Literature 2, recess portions are respectively formed so as to correspond to the injection hole outlets of respective injection holes, and the injection holes are formed so as to span a surface that is on a radially inner side of these
Co recess portions relative to a valve seat central axis. Thus, portions of the injection holes that are on a radial outer side relative to the valve seat central axis are in a cut away state, making injection hole lengths on the radially inner side relative to the fuel injection valve central axis shorter than injection hole lengths on the radially outer side.
However, in order to form a bidirectional cluster spray while atomizing the fuel efficiently, it is necessary to dispose the injection holes so as to be : offset toward the respective cluster sprays such that the injection hole directions face the main flow of the fuel flow directly when the main flow of the fuel flow from the seat portion of the valve seat toward the injection hole inlets and the injection holes are projected onto the above-mentioned plane.
« To “. . . E + <
Because of that, the recess portions, which have larger diameters than the injection holes, are closer to each other, and one problem has been that the liquid films that are sprayed therefrom interfere with each other, making atomization deteriorate. The influence thereof has been particularly pronounced as the number of injection holes has been increased with the aim of atomization.
The present invention aims to solve the above problems and an object of the present invention is to provide a fuel injection valve that can improve spraying direction freedom while promoting atomization of sprayed fuel.
MEANS FOR SOLVING THE PROBLEM
{ In order to achieve the above object, according to one aspect of the present invention, there is provided a fuel injection valve including: a valve seat including: a seat surface that is inclined such that a diameter is gradually reduced downstream; and a valve seat opening that is disposed downstream from the seat surface; a valve body that is placed in contact with the seat surface to stop outflow of fuel from the valve seat opening, and that is separated from the seat surface to allow outflow of fuel from the valve seat opening; and an injection hole plate that is fixed to a downstream end surface of the valve seat, and that includes a plurality of injection holes that externally spray fuel that flows out of the valve seat opening, wherein: the injection hole plate is disposed such that an imaginary circular conical surface that is a { downstream extension of the seat surface and an upstream end surface of the injection hole plate intersect to form an imaginary circle; the injection holes include: an injection hole main body; and a large diameter portion that is adjacent downstream from the injection hole main body, and that constitutes an outlet of the injection hole; a diameter of the large diameter portions is greater than a diameter of the injection hole main bodies; an inlet portion of the injection hole main bodies is disposed nearer to a valve seat central axis than the valve seat opening, where a diameter is smallest in the valve seat; when the injection holes are projected perpendicularly onto a plane that is perpendicular to the valve seat central axis, inlet centers and outlet centers of the injection hole main bodies in the plane are respectively disposed so as to line up on radial straight lines that pass through the valve seat central axis, and the outlet centers are t » * : disposed further away from the valve seat central axis than the inlet centers; and inner wall lengths of injection holes on a side of the injection hole main bodies near the valve seat central axis are made asymmetric relative to the straight lines by offsetting centers of the large diameter portions relative to the straight lines.
The fuel injection valve according to the present invention can improve spraying direction freedom while promoting atomization of sprayed fuel.
( 10 Figure 1 is a cross section parallel to a shaft axis of a fuel injection valve according to Embodiment 1 of the present invention;
Figure 2 is a diagram that combines an enlargement of a valve seat, an injection hole plate, and a ball from Figure 1 and a plan that shows a central portion of the injection hole plate;
Figure 3 is a cross section that shows Portion Ill from Figure 2 enlarged;
Figure 4 is a plan that shows Portion IV from Figure 2 enlarged;
Figure 5 is a graph that shows time variation in sprayed particle diameter during fuel injection by the fuel injection valve in Figure 1; - Figure 6 is a diagram that combines a cross section of a valve seat, an { injection hole plate, and a ball of a fuel injection valve according to Embodiment 2 of the present invention and a plan that shows a central portion of the injection hole plate;
Figure 7 is a cross section that shows Portion VII from Figure 6 enlarged; :
Figure 8 is a plan that shows Portion VIII from Figure 6 enlarged;
Figure 9 is a cross section that shows an injection hole of a fuel injection valve according to Embodiment 3 of the present invention enlarged;
Figure 10 is a diagram that combines a cross section of a valve seat, an injection hole plate, and a ball of a fuel injection valve according to Embodiment 4 of the present invention and a plan that shows a central portion of the injection hole plate;
t Ce ,
Figure 11 is a cross section that shows Portion XI from Figure 10 enlarged; and
Figure 12 is a plan that shows Portion XII from Figure 10 enlarged.
| Embodiments for implementing the present invention will now be explained with reference to the drawings.
Embodiment 1
Figure 1 is a cross section parallel to a shaft axis of a fuel injection valve according to Embodiment 1 of the present invention, and fuel flows downward from an upper end of the fuel injection valve in Figure 1. In the ( figure, a cylindrical fixed core 2 is fixed to an upper end portion of a magnetic pipe 1. The magnetic pipe 1 and the fixed core 2 are disposed coaxially. The magnetic pipe 1 is press-fitted onto a downstream end portion of the fixed core 2 and is welded.
A valve seat 3 and an injection hole plate 4 are fixed to a lower end portion inside the magnetic pipe 1. A plurality of injection holes 5 that spray fuel are disposed on the injection hole plate 4. The injection holes 5 pass through the injection hole plate 4 in a plate thickness direction.
The injection hole plate 4 is fixed to a downstream end surface of the { 20 valve seat 3 by a first welded portion 4a, is inserted into the magnetic pipe 1 in that state, and is then fixed to the magnetic pipe 1 by a second welded portion 4b.
Inserted inside the magnetic pipe 1 are: a ball 6 that constitutes a valve body; a needle pipe 7 that is fixed by welding onto the ball 6; and an ’ ’ armature (a movable core) 8 that is fixed to an upstream end portion (an end portion at an opposite end from the ball 6) of the needle pipe 7. The armature 8 is press-fitted into the upstream end portion of the needle pipe 7 and is welded.
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The armature 8 is slidable in an axial direction inside the magnetic pipe 1. A guiding portion 1a that guides the sliding movement of the armature 8 is disposed on an inner circumferential surface of the magnetic pipe 1. The needle pipe 7 and the armature 8 move together in the axial direction when the armature 8 slides. The ball 6 is thereby placed in contact with or separated from the valve seat 3. An upper end surface of the armature 8 is also placed in contact with or separated from a lower end surface of the fixed core 2.
Chamfered portions 6a are disposed on an outer circumference of the ball 6.
A compression spring 9 that presses the needle pipe 7 in a direction that pushes the ball 6 against the valve seat 3 is inserted inside the fixed core 2.
An adjuster 10 that adjusts the load of the compression spring 9 is also fixed inside the fixed core 2. In addition, a filter 11 is inserted into an upper end [ portion of the fixed core 2, which constitutes a fuel inlet portion.
An electromagnetic coil 12 is fixed onto an outer circumference of a downstream end portion (an end portion near the armature 8) of the fixed core 2.
The electromagnetic coil 12 has: a resin bobbin 13; and a coil main body 14 that is wound onto an outer circumference thereof. A metal sheet (a magnetic circuit component member) 15 that constitutes a yoke portion of a magnetic circuit is fixed by welding between the magnetic pipe 1 and the fixed core 2.
The magnetic pipe 1, the fixed core 2, the electromagnetic coil 12, and the metal sheet 15 are molded integrally into a resin housing 16. A connector i portion 16a is disposed on the resin housing 16. Terminals 17 that are electrically connected to the coil main body 14 are led out into the connector portion 16a.
Figure 2 is a diagram that combines an enlarged view of the valve seat 3, the injection hole plate 4, and the ball 6 from Figure 1 enlarged, and aplan (a view in the direction of Arrow Il of a portion that is exposed to the fuel flow channel from a side near the ball 6) that shows a central portion of the injection hole plate 4.
A seat surface 3a on which the ball 6 is separably placed in contact is disposed inside the valve seat 3. The seat surface 3a is inclined such that a
Claims (7)
1. A fuel injection valve comprising: a valve seat including: a seat surface that is inclined such that a diameter-.is gradually reduced downstream; and To
~. a valve seat opening that is disposed downstream from the seat surface; a valve body that is placed in contact with the seat surface to stop - outflow of fuel from the valve seat opening, and that is separated from the seat surface to allow outflow of fuel from the valve seat opening; and
10. an injection hole plate that is fixed to a downstream end surface of the valve seat, and that includes a plurality of injection holes that externally spray fuel that flows out of the valve seat opening, oo oo wherein: the injection hole plate is disposed such that an imaginary circular conical surface that is a downstream extension of the seat surface and an upstream end surface of the injection hole plate intersect to form an imaginary : circle; : : oo the injection holes comprise: an injection hole main body; and Co : a large diameter portion that is adjacent downstream from the injection hole main body, and that constitutes an outlet of the injection hole; - a diameter of the large diameter portions is greater than a diameter of the injection hole main bodies; an inlet portion of the injection hole main bodies is disposed nearer to a valve seat central axis than the valve seat opening, where a diameter is smallest in the valve seat; when the injection holes are projected perpendicularly onto a plane that is perpendicular to the valve seat central axis, inlet centers and outlet centers of the injection hole main bodies in the plane are respectively disposed so as to line up on radial straight lines that pass through the valve seat central axis, and the outlet centers are disposed further away from the valve seat central axis than the inlet centers; and Co inner wall lengths of injection holes on a side of the injection hole main bodies near the valve seat central axis are made asymmetric relative to the
. ‘ . straight lines by offsetting centers of the large diameter portions relative to the straight lines.
2. The fuel injection valve according to Claim 1, wherein: a convex portion that protrudes downstream is disposed on the injection hole plate in order to avoid interference with a tip end portion of the valve body during valve closing; - an injection hole plate flat portion is disposed around the convex portion : of the injection hole plate; and Ce the injection holes are disposed on the injection hole plate flat portion.
3. The fuel injection valve according to Claim 1, wherein: oo a flat portion that is parallel or approximately parallel to the injection hole plate is disposed on a tip end portion of the valve body in order to avoid interference with the injection hole plate during valve closing; and the flat portion is disposed radially further inward than inlets of the injection hole main bodies when projected vertically onto the plane.
4, The fuel injection valve according to any one of Claims 1 through 3, wherein: oo oT cylindrical portions that have a smallest cross-sectional area between inlets and outlets of the injection hole main bodies are disposed ‘in flow 2g channels of the injection hole main bodies.
5. The fuel injection valve according to claim 1 wherein: ©. the injection hole plate is configured by laminating a first injection hole plate that is disposed on an upstream side and a second injection hole plate thatis disposed on a downstream side; and the large diameter portions are formed on the second injection hole plate by punching, and then the second injection hole plate and the first injection hole plate are laminated in a positioned state, and the injection hole - main bodies are formed by punching so as to pass through from a downstream side of the second injection hole plate to an upstream side of the first injection hole plate.
CT
6. The fuel injection valve according to Claim 5, wherein: a positioning aperture is disposed on a first of the first injection hole plate and the second injection hole plate; and a half-blanked portion that is fitted together with the positioning aperture is disposed on a second of the first injection hole plate and the second injection hole plate. So
7. The fuel injection valve according to claim 5 or 6, wherein: a thin portion that is formed so as to make a downstream hollow in an upstream end surface of the first injection hole plate is disposed on a portion of thefirst injection hole plate that faces into the valve seat opening; and inlets of the injection hole main bodies are disposed on the thin portion. 21 oo
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013085541A JP5748796B2 (en) | 2013-04-16 | 2013-04-16 | Fuel injection valve |
| PCT/JP2013/083368 WO2014171038A1 (en) | 2013-04-16 | 2013-12-12 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PH12015502333B1 true PH12015502333B1 (en) | 2016-02-22 |
| PH12015502333A1 PH12015502333A1 (en) | 2016-02-22 |
Family
ID=51731005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PH12015502333A PH12015502333A1 (en) | 2013-04-16 | 2015-10-08 | Fuel injection valve |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5748796B2 (en) |
| CN (1) | CN105121834B (en) |
| PH (1) | PH12015502333A1 (en) |
| WO (1) | WO2014171038A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015225342A1 (en) * | 2015-12-15 | 2017-06-22 | Robert Bosch Gmbh | Spray hole disc and valve |
| JP6668079B2 (en) * | 2016-01-12 | 2020-03-18 | 日立オートモティブシステムズ株式会社 | Fuel injection device |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10281040A (en) * | 1997-04-09 | 1998-10-20 | Toyota Motor Corp | Fuel injection nozzle |
| JP2001317431A (en) * | 2000-02-25 | 2001-11-16 | Denso Corp | Fluid injection nozzle |
| JP4097056B2 (en) * | 2000-03-17 | 2008-06-04 | 株式会社デンソー | Fuel injection valve |
| DE10059007A1 (en) * | 2000-11-28 | 2002-05-29 | Bosch Gmbh Robert | Fuel injector |
| JP3759918B2 (en) * | 2002-10-16 | 2006-03-29 | 三菱電機株式会社 | Fuel injection valve |
| JP3977728B2 (en) * | 2002-11-18 | 2007-09-19 | 三菱電機株式会社 | Fuel injection valve |
| JP4209803B2 (en) * | 2004-04-19 | 2009-01-14 | 三菱電機株式会社 | Fuel injection valve |
| US7185831B2 (en) * | 2004-11-05 | 2007-03-06 | Ford Motor Company | Low pressure fuel injector nozzle |
| JP4306656B2 (en) * | 2005-08-01 | 2009-08-05 | 株式会社日立製作所 | Fuel injection valve |
| JP4129018B2 (en) * | 2005-09-30 | 2008-07-30 | 三菱電機株式会社 | Fuel injection valve |
| JP2008014216A (en) * | 2006-07-05 | 2008-01-24 | Toyota Motor Corp | Fuel injection valve |
| DE102006041472A1 (en) * | 2006-09-05 | 2008-03-06 | Robert Bosch Gmbh | Fuel injecting valve for fuel injection systems of internal-combustion engines, has discharge ports consist of two sections, where lower downstream section has larger opening width than opening width of upper upstream section |
| JP4510091B2 (en) * | 2007-03-27 | 2010-07-21 | 三菱電機株式会社 | Fuel injection valve |
| JP4808801B2 (en) * | 2009-05-18 | 2011-11-02 | 三菱電機株式会社 | Fuel injection valve |
| JP5161853B2 (en) * | 2009-09-29 | 2013-03-13 | 三菱電機株式会社 | Fuel injection valve |
| JP4757947B2 (en) * | 2010-03-19 | 2011-08-24 | 三菱電機株式会社 | Fuel injection valve |
| JP5134063B2 (en) * | 2010-11-01 | 2013-01-30 | 三菱電機株式会社 | Fuel injection valve |
| JP5295311B2 (en) * | 2011-06-09 | 2013-09-18 | 三菱電機株式会社 | Fuel injection valve |
| JP5295316B2 (en) * | 2011-06-22 | 2013-09-18 | 三菱電機株式会社 | Spray generation method using fluid injection valve, fluid injection valve, and spray generation device |
| JP5295319B2 (en) * | 2011-06-24 | 2013-09-18 | 三菱電機株式会社 | Fuel injection valve |
| WO2013011584A1 (en) * | 2011-07-21 | 2013-01-24 | トヨタ自動車株式会社 | Fuel injection valve |
-
2013
- 2013-04-16 JP JP2013085541A patent/JP5748796B2/en not_active Expired - Fee Related
- 2013-12-12 WO PCT/JP2013/083368 patent/WO2014171038A1/en active Application Filing
- 2013-12-12 CN CN201380075715.7A patent/CN105121834B/en active Active
-
2015
- 2015-10-08 PH PH12015502333A patent/PH12015502333A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN105121834A (en) | 2015-12-02 |
| JP2014208974A (en) | 2014-11-06 |
| PH12015502333A1 (en) | 2016-02-22 |
| CN105121834B (en) | 2017-11-24 |
| WO2014171038A1 (en) | 2014-10-23 |
| JP5748796B2 (en) | 2015-07-15 |
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