CN107355328B - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- CN107355328B CN107355328B CN201611253694.5A CN201611253694A CN107355328B CN 107355328 B CN107355328 B CN 107355328B CN 201611253694 A CN201611253694 A CN 201611253694A CN 107355328 B CN107355328 B CN 107355328B
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- CN
- China
- Prior art keywords
- fuel
- convolution
- access
- injection valve
- spray
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 258
- 238000002347 injection Methods 0.000 title claims abstract description 72
- 239000007924 injection Substances 0.000 title claims abstract description 72
- 239000007921 spray Substances 0.000 claims abstract description 127
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims description 32
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000000280 densification Methods 0.000 abstract description 3
- 230000002452 interceptive effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 238000004891 communication Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009182 swimming 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
-
- 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
-
- 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
-
- 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
- F02M61/184—Discharge orifices having non circular sections
-
- 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
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
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
A kind of fuel injection valve, it is small to the compact overall structure and dead volume of the fuel passage of fuel application rotating force, it is able to achieve the micronized of injected fuel spray and resistance to pressure is good.Spray orifice (36), swirling chamber (41) and the convolution of jet orifice plate (35) as fuel injection valve (1) front end are set to make the injected fuel spray sprayed from two neighboring spray orifice (36) than interfering at the position of the position upstream side of the state splitting fuel liquidus (52) of fuel liquid film (51) with access (42).Due to hollow cone shape fuel liquid film (51) it is circumferential in uneven thickness; and it avoids the most thick part of circumferential thickness (51a) and interferes; therefore, can inhibit to make micronized be deteriorated due to fuel liquid film (51) interferes with each other.In addition, the distance between adjacent spray orifice (36) can be reduced, therefore it is able to achieve the densification of fuel passage entirety and dead volume can be reduced, the micronized for being able to achieve the injected fuel spray at injection initial stage improves.
Description
Technical field
The present invention relates to a kind of fuel injection valve of the supply fuel such as internal combustion engine for automobile more particularly to a kind of realities
The fuel injection valve of the promotion of the micronized in spray characteristics is showed.
Background technique
In recent years, constantly stringent to the discharge gas limitation of the internal combustion engine of automobile, it is desirable that be ejected from fuel injection valve
The micronized of injected fuel spray.As the prior art of the micronized for realizing injected fuel spray, propose one kind by applying to fuel
Add-back spin simultaneously forms swirling flow, the technology of Lai Shixian micronized.
For example, in patent document 1, proposing a kind of fuel injection valve, which is provided in jet orifice plate
It is vortexed and applies room, which applies room and be connected to by communication paths with the opening portion in the downstream side of valve seat.Vortex applies room
So that fuel is applied the component of rotating force in internal convolution, and the bottom for applying room that is vortexed is provided with multiple spray orifices.Originally showing
In example, inhibit to the case where being interfered at liquid film part from the injected fuel spray that each spray orifice ejects, and realize combustion
Expect spraying micronized.
In addition, proposing a kind of structure of fuel passage in patent document 2, returned as rotating force is applied to fuel
Spin applying unit, there are two vortex chamber and two biasing accesses for the fuel passage tool, wherein two vortex chambers are in
Centre is provided with fuel injection hole, and two biasing accesses are relatively connect with the tangential direction of the vortex chamber, and from opposite
The fuel from upstream side is imported in the direction of the center-biased of vortex chamber.In this example, the two fuel spray ejected
The form of mist is that respective outside (periphery) portion is strong, spray discharge pattern of the thin hollow cone shape in center, downstream side it is each
The flow distribution of the injected fuel spray distribution of shapes substantially symmetrical relative to flow center.
Existing technical literature
Patent document
Patent document 1: Japanese Patent Laid-Open 2013-167161 bulletin
Patent document 2: Japanese Patent Laid-Open 2002-202031 bulletin
Although being able to achieve the micronized of injected fuel spray as described above, rotating force and forming swirling flow by applying to fuel,
But on the contrary, following such problems can be generated.In patent document 1, in order to make the injected fuel spray ejected from spray-hole in liquid
It is not interfered at membrane part, needs that the distance between adjacent spray orifice is made to become larger.Thus, communication paths can be made elongated, fuel is logical
The overall structure on road becomes larger, and is deteriorated such problems accordingly, there exist layout.
In addition, dead volume, which will increase, eject fuel after injection just starts with the elongated a considerable amount of communication paths, meeting
Rectificationization and accelerate insufficient fuel, so that the micronized of the injected fuel spray at injection initial stage is deteriorated.Further, since needing to increase
It is provided with spray orifice and the be vortexed jet orifice plate for the fuel passage for applying room and the weld diameter of valve seat, accordingly, there exist because of fuel
Such problems that pressure and the stress for being applied to plate become larger, durability is deteriorated.
In addition, if the variation of micronized and because of plate caused by view of above-mentioned such increase because of dead volume
Then there are more spray orifices that the overall structure of fuel passage difficult to realize becomes larger in the variation of durability caused by weld diameter expands
Change, and such problems in the engine of the required biggish big capacity of flow can not be applied.
In addition, in patent document 2, since the fuel from upstream is equably directed into vortex by two biasing accesses
Room, therefore, after the fuel for being applied with vortex flows into spray orifice, the circumferential thickness of the fuel liquid film formed along inner wall can become equal
It is even, it can also become uniform in the circumferential thickness of the fuel liquid film just formed after the injection of each spray orifice.Thus, if it is desired to reduce
Distance between spray orifice so that fuel passage compact overall structure, then there is uniform and with thickness fuel liquid film and each other can
It interferes, and micronized is made to be deteriorated such problems.
Summary of the invention
The present invention makees to solve technical problem as described above, its purpose is to provide a kind of fuel injection valve,
In the fuel injection valve, apply the compact overall structure of the fuel passage of rotating force to fuel, dead volume is small, is able to achieve fuel spray
The micronized of mist, and resistance to pressure is good.
Fuel injection valve of the invention, comprising: valve seat, the valve seat have opening portion in downstream side；Spool, the spool
By with the abutting of the valve seat, separate the opening and closing of fuel passage controlled；Jet orifice plate, the jet orifice plate are fixed on valve
The downstream side of seat simultaneously has the multiple spray orifices penetrated through on plate thickness direction, which is characterized in that sets in the upstream-side end surface of jet orifice plate
It is equipped with the recess portion opposite and bigger than opening portion diameter with the opening portion of valve seat, multiple spray orifice configurations are in the inside than recess portion
Opening portion close to the position of the peripheral side of jet orifice plate, in the inside of recess portion, as a part of fuel passage, be provided with make to
Multiple swirling chambers for the fuel swirl that each spray orifice flows into and upstream side end is connected to the opening portion of valve seat and end of downstream side
The convolution access being connected to swirling chamber, spray orifice, swirling chamber and convolution are arranged as follows with access, that is, from each spray orifice
The injected fuel spray ejected is from the state splitting of hollow coniform circumferential fuel liquid film in uneven thickness, by fuel fluid
The state of line eventually becomes the state of fuel droplet, and the fuel liquid film ejected from spray orifice adjacent to each other is than becoming fuel
It avoids the most thick part of circumferential thickness and interferes in the position of the position of the state of liquidus on the upstream side.
Fuel injection valve according to the present invention, it is circumferential in uneven thickness due to what is ejected from spray orifice adjacent to each other
Position of the fuel liquid film of hollow cone shape in the position of the state than becoming fuel liquidus on the upstream side, avoids circumferential thickness
Most thick part interferes, therefore can inhibit the deterioration of the micronized as caused by the mutual interference of fuel liquid film, and
The distance between adjacent spray orifice can be reduced.Whereby, since the compact overall structure of fuel passage can be made, and reduce dead volume, because
This is able to achieve the micronized of injected fuel spray.Further, since the jet orifice plate and valve seat for being set to the outside of fuel passage can be reduced
Diameter of a circle is welded, therefore the stress in jet orifice plate is applied to by fuel pressure and is suppressed, so that durability improves.
Detailed description of the invention
Fig. 1 is the cross-sectional view for indicating the fuel injection valve of embodiment of the present invention 1.
Fig. 2 is the enlarged partial sectional view for indicating the front end of fuel injection valve of embodiment of the present invention 1.
Fig. 3 is the top view for indicating the front end of fuel injection valve of embodiment of the present invention 1.
Fig. 4 is the figure being illustrated to the structure and fuel stream of the front end of the fuel injection valve of embodiment of the present invention 1.
Fig. 5 is the schematic diagram for indicating the adjacent injected fuel spray sprayed from the fuel injection valve of embodiments of the present invention 1.
Fig. 6 is the figure being illustrated to the fuel liquid film in the spray orifice exit of the fuel injection valve of embodiment of the present invention 1.
Fig. 7 is the distance L1 interfered to adjacent injected fuel spray in the fuel injection valve of embodiment of the present invention 1
Position at the figure that is illustrated of fuel liquid film.
Fig. 8 is the figure being illustrated to the structure and fuel stream of the front end of the fuel injection valve of embodiment of the present invention 2.
Fig. 9 is the figure being illustrated to the structure and fuel stream of the front end of the fuel injection valve of embodiment of the present invention 2.
Figure 10 is illustrated to the structure and fuel stream of the front end of the fuel injection valve of embodiment of the present invention 2
Figure.
Figure 11 is illustrated to the structure and fuel stream of the front end of the fuel injection valve of embodiment of the present invention 3
Figure.
Figure 12 is the cross-sectional view for indicating the spray orifice of fuel injection valve of embodiment of the present invention 3.
Figure 13 is the top view for indicating the front end of fuel injection valve of embodiment of the present invention 4.
Figure 14 is the top view for indicating the front end of fuel injection valve of embodiment of the present invention 4.
(symbol description)
1 fuel injection valve；
2 spiral piping arrangements；
3 valve gears；
4 fuel passages；
21 shells；
22 iron cores；
23 coils；
24 armatures；
31 valve bodies；
32 valve seats；
32a valve seat block face；
32b valve seat opening portion；
33 spools；
34 compressed springs；
35 jet orifice plates；
35a upstream-side end surface；
35b recess portion；
35c recess sidewalls；
36,36A spray orifice；
36a orifice center；
The outlet of 36b spray orifice；
37 balls；
37a corner portion；
41 swirling chambers；
41a, 41b fuel introduction part；
Access is used in 42 convolutions；
Access is used in the convolution of 42a central axis side；
Access is used in the convolution of the peripheral side 42b；
43 common fuel incoming lines；
50,51 fuel liquid film；
52 fuel liquidus；
53 fuel droplets.
Specific embodiment
Embodiment 1
Hereinafter, being based on attached drawing, the fuel injection valve of embodiment of the present invention 1 is illustrated.Fig. 1 is to indicate this embodiment party
The cross-sectional view of the fuel injection valve of formula 1, Fig. 2 are to indicate that the partial enlargement of the front end of fuel injection valve of present embodiment 1 cuts open
View, Fig. 3 be from from upstream side in Fig. 2 with the top view of the part indicated A-A.In addition, in the various figures, for phase in figure
Same, comparable part marks the same symbol.
Fuel injection valve 1 includes: spiral piping arrangement 2, and the spiral piping arrangement 2 generates electromagnetic force；And valve gear 3, institute
Valve gear 3 is stated to work and being powered to spiral piping arrangement 2.Spiral piping arrangement 2 includes: shell 21, and the shell 21 forms magnetic
The yoke part on road；Iron core 22, the iron core 22 are the fixed iron cores that 21 inside of shell is arranged in；Coil 23, the line
Circle 23 is arranged in a manner of surrounding iron core 22；And armature 24, the armature 24 are setting in 23 inside of coil and move back and forth
Movable core.
Valve gear 3 includes: valve body 31, the cylindrical shape of the valve body 31, and before being pressed into and being welded on iron core 22
The outer diameter part at end；The midway of the access for fuel flowing inside valve body 31 is arranged in valve seat 32, the valve seat 32, and under
Swimming side has valve seat opening portion 32b；Spool 33, the spool 33 are arranged in the inside of valve body 31, and by with valve seat 32
It abuts, separate to control the opening and closing of fuel passage；And compressed spring 34, the compressed spring 34 are arranged in spool 33
Upstream be provided in jet orifice plate 35 along plate in addition, being combined with jet orifice plate 35 by welding in the downstream side of valve seat 32
The thick perforative multiple spray orifices 36 in direction.
Armature 24 is welded in spool 33 after being pressed into spool 33.Spool 33 is in the interior table for being pressed into and being welded to armature 24
The front end of the hollow bar in face has the ball 37 fixed by welding.As shown in Fig. 2, ball 37 has and fuel injection
The parallel corner portion 37a of the central axis of valve 1.In addition, valve seat 32 has the valve seat block face 32a abutted with ball 37.
Then, movement is illustrated.It is moved when the control device from engine is sent to the driving circuit of fuel injection valve 1
When making signal, electric current can flow through the coil 23 of fuel injection valve 1, and by armature 24,31 structure of iron core 22, shell 21 and valve body
At magnetic circuit in generate magnetic flux.
Whereby, when armature 24 to 22 side of iron core carry out suction action, and make with the spool 33 of 24 integral structure of armature from
When valve opening seat seat surface portion 32a is to form gap, fuel can be passed through from the corner portion 37a for the ball 37 for being welded to 33 front end of spool
Gap between valve seat block face 32a and ball 37, and sprayed from multiple spray orifices 36 to engine suction access.
In addition, when stop signal of the control device from engine to the driving circuit sending action of fuel injection valve 1,
The energization of coil 23 stops, the compressed spring 34 for being pressed spool 33 towards closing direction using the magnetic flux reduction in magnetic loop,
It is in close state the gap between spool 33 and valve seat block face 32a, and terminates fuel injection.Spool 33 by with valve body
31 guide portion 24a and slided with armature 24, and under valve opening state, make the upper surface 24b of armature 24 and the following table of iron core 22
Face abuts.
Using Fig. 2~Fig. 4, the structure of the front end of the fuel injection valve 1 of present embodiment 1 is described in detail.?
The upstream-side end surface 35a of jet orifice plate 35 is provided with recess portion 35b, and the recess portion 35b is opposite with valve seat opening portion 32b, and diameter
Diameter than valve seat opening portion 32b is big.Multiple configurations of spray orifice 36 are more leaning on spray orifice than the valve seat opening portion 32b inside recess portion 35b
At the position of the peripheral side of plate 35.
In the recess portion 35b of jet orifice plate 35, comprising: multiple swirling chambers 41, multiple swirling chambers 41 make to flow into each spray orifice 36
Fuel swirl, as to fuel apply convolution fuel passage；And access 42a and periphery are used in the convolution of central axis side
Side convolution is used logical with access 42b (being referred to as convolution access 42), the central axis side convolution with access 42a and peripheral side convolution
The upstream side end of road 42b is connected to valve seat opening portion 32b, and end of downstream side is connected to swirling chamber 41.
As shown in figure 3, the front end of fuel injection valve 1 includes three spray orifices equally spaced configured on same circumference
36, and include: three swirling chambers 41, three swirling chambers 41 surround the peripheral portion of each spray orifice 36；And central axis side
Convolution is circled round with access 42a and peripheral side uses access 42b, and the central axis side convolution is used logical with access 42a and peripheral side convolution
Road 42b makes fuel flow into each swirling chamber 41.Convolution is made of with a part of access 42 recess sidewalls 35c.
It circles round and uses than each swirling chamber 41 of valve seat opening portion 32b outer peripheral side and the central axis side of substantially circular shape
Access 42a circles round with peripheral side and is connected with access 42b.Fuel is imported into and a swirling chamber 41 from common fuel inlet pipe road 43
The convolution of corresponding central axis side is in access 42a and peripheral side convolution access 42b corresponding with adjacent swirling chamber 41.
Using Fig. 4, swirling chamber 41 and convolution to present embodiment 1 are carried out specifically with the structure of access 42 and fuel stream
It is bright.The orifice center 36a at the center of the entrance side (upstream side) as spray orifice 36 be represented by dashed line in figure it is roughly circular
Swirling chamber 41 center it is consistent, spray orifice 36 and swirling chamber 41 are located on concentric circles (X1=X2).In addition, the convolution of central axis side is used
Access 42a and peripheral side convolution are duct width and the equal access (Y1=Y2) of passage sections product with access 42b.
Central axis side convolution access 42a and peripheral side convolution access 42b is to be directed toward the center relative to swirling chamber 41
The mode in the direction that (identical as orifice center 36a herein) is mutually offset is connected to swirling chamber 41.Access is used in the convolution of central axis side
Fuel is imported into swirling chamber 41 from fuel introduction part 41a by 42a, and makes fuel relative to the center of swirling chamber 41 to valve seat center
The side axis Z flows into.The arrow 5a being shown in broken lines in the figure indicates to be flowed into swirling chamber from the convolution of central axis side with access 42a
The mainstream of 41 fuel stream.
In addition, peripheral side convolution makes fuel imported into swirling chamber 41 from fuel introduction part 41b with access 42b, and make fuel
Center relative to swirling chamber 41 is flowed into the peripheral side of jet orifice plate 35.The arrow 5b being shown in broken lines in the figure is indicated from outer
Side convolution flows into the mainstream of the fuel stream of swirling chamber 41 with access 42b.In addition, fuel introduction part 41a, 41b refers to swirling chamber
41 use with convolution near the boundary portion of access 42, are not only to refer to a bit.
In this way, by utilizing two convolution accesses for being directed toward the direction to offset each other relative to the center of swirling chamber 41
42, fuel is imported into swirling chamber 41 from fuel introduction part 41a, 41b at two positions, thus make to generate in swirling chamber 41
The convolution direction of each fuel stream is identical, will not substantially hinder the mutual flowing between each fuel stream.Thus, Fig. 3 can be generated
Shown such powerful swirling flow (being indicated in figure with arrow 5).In addition, convolution access 42 is arranged to make multiple convolutions
The convolution direction of fuel in room 41 is in exactly the same direction.
Then, using Fig. 5, the injected fuel spray ejected from the spray orifice 36 of fuel injection valve 1 is illustrated.Fig. 5 is table
Show the schematic diagram for the adjacent injected fuel spray that the fuel injection valve from present embodiment 1 ejects.As shown in figure 5, being sprayed from fuel
Penetrating the injected fuel spray that valve 1 ejects includes fuel liquid film 51, fuel liquidus 52 and fuel droplet 53 these three states.In addition,
In figure, L1, L2, L3 indicate the distance away from spray orifice outlet 36b.
After the fuel for being applied convolution in swirling chamber 41 is imported into spray orifice 36, fuel can be along the inner wall of spray orifice 36
Liquid film.Thus, the injected fuel spray that 36b sprays from spray orifice outlet fuel liquid film 51 in hollow cone shape after rigid injection
State.Fuel liquid film 51 is gradually divided with extending towards downstream side, and becomes substantially fuel liquidus at the position of distance L2
52 state finally becomes the state for more carefully dividing the fuel droplet 53 to granulate at the position of distance L3.
The rule of spray orifice 36, swirling chamber 41 and the convolution of the jet orifice plate 35 of front end as fuel injection valve 1 access 42
Lattice are set to: the injected fuel spray sprayed from two adjacent spray orifices 36 is becoming fuel than the state splitting from fuel liquid film 51
It is interfered at the position of the distance L1 of the position upstream side of the distance L2 of liquidus 52.Symbol P indicates adjacent in the figure
Two fuel liquid films 51 start the position P interfered with each other.
In addition, the front end of fuel injection valve 1 is configured to the fuel liquid film 51 of the hollow cone shape sprayed from spray orifice 36
Circumferential is in uneven thickness.In present embodiment 1, as specific means, make to pass through convolution from a convolution access 42
Room 41 flows into the fuel of spray orifice 36 and passes through the ratio of the fuel of the inflow spray orifice 36 of swirling chamber 41 not from another convolution access 42
Together.
As shown in figure 4, since two convolutions with the passage shape of access 42 are substantially circular shapes, it is opened from valve seat
Oral area 32b flows into the mainstream (being arrow 5a in figure) of the central axis side convolution fuel stream of access 42a and flows into peripheral side and returns
The mainstream (being arrow 5b in figure) of the rotation fuel stream of access 42b is partial to recess sidewalls 35c flowing respectively.That is, can utilize
The shape of recess sidewalls 35c controls the direction of fuel stream.
In the example depicted in fig. 4, the convolution of central axis side is being more biased towards than peripheral side convolution with access 42b with access 42a
It is connected at the position of orifice center 36a with swirling chamber 41.Thus, swirling chamber 41 is flowed into from central axis side convolution access 42a
Fuel stream ratio from peripheral side convolution with access 42b flow into swirling chamber 41 fuel stream be more biased towards in orifice center 36a.
By using this structure, it is sprayed so as to increase to pass through swirling chamber 41 from central axis side convolution access 42a and flow into
The amount of the fuel in hole 36, and it is poor that the ratio for the fuel for flowing into spray orifice 36 from two convolution accesses 42 can be made to generate.As a result,
It can make the in uneven thickness of the circumferential direction of the fuel liquid film 51 of the hollow cone shape sprayed from spray orifice 36.
Form and adjacent fuel using Fig. 6 and Fig. 7, to the fuel liquid film at the spray orifice outlet 36b of fuel injection valve 1
The form of fuel liquid film at the position of the distance L1 interfered by spraying is illustrated.Fig. 6 expression is indicated in Fig. 5 with B-B
Position at fuel liquid film, Fig. 7 indicates the fuel liquid film at the position indicated in Fig. 5 with B-B, C-C.
Three configurations of spray orifice 36 are on the same circumference centered on valve seat central axis Z, as shown in figure 3, each swirling chamber
The direction of swirling flow caused by 41 is identical direction.As shown in fig. 6, the week of the fuel liquid film 50 at spray orifice outlet 36b
To thickness be formed as unevenly, and be set to be configured at the thick 50a of fuel liquid film 50 by valve seat central axis Z mono-
Side.
In addition, in the injected fuel spray than ejecting from the position upstream of the distance L2 of the state splitting of fuel liquid film 51
At the position of side, towards spray orifice outlet 36b's due to the influence of the swirling flow of the fuel caused by spray orifice 36 of fuel liquid film 51
Tangential direction (being indicated by the arrow T) injection.Just the circumferential direction of each fuel liquid film 51 after injection is in uneven thickness, and phase respectively
The fuel liquid film 50 of spray orifice outlet 36b is rotated in the same direction (being in the example depicted in fig. 7 90 °).
As shown in fig. 7, due at the position that two adjacent fuel liquid films 51 start the distance L1 interfered with each other,
The most thick part 51a of the circumferential thickness of fuel liquid film 51 is not opposite each other, therefore, will not occur at most thick part 51a
Interference.In addition, two adjacent fuel liquid films 51 start mutually to occur dry from valve seat central axis Z-direction
The position P related to is located on the straight line of the orifice center 36a connection of adjacent spray orifice 36, and is that fuel liquid film 51 is easiest to each other
The position interfered.
By using the circumferential situation phase in homogeneous thickness of the fuel liquid film after structure as described above, with rigid injection
Than can more reduce the distance between adjacent spray orifice 36, and the overall structure of fuel passage can be made to become compact.Further, since phase
Two adjacent fuel liquid films 51 are avoided the most thick part 51a of circumferential thickness and are interfered with each other, and therefore, can inhibit because of fuel fluid
Micronized is deteriorated caused by the mutual interference of film 51.
Further, since making since the injected fuel spray that adjacent spray orifice 36 sprays is in the fuel liquid film 51 than hollow cone shape
It is interfered at the position of the position upstream side of division, therefore, adjacent injected fuel spray is opened than fuel liquid film 51 with making
The case where position of division interferes at the position of side farther downstream of beginning is compared, and the distance between adjacent spray orifice 36 can be reduced.
In addition, making the upstream portion of central axis side convolution access 42a and peripheral side convolution access 42b are integrated to share by setting
Fuel inlet pipe road 43, so as to keep the overall structure of fuel passage more compact.
In conclusion according to the present embodiment 1, fuel can be realized by applying rotating force to fuel and forming swirling flow
Spraying micronized, and the compact overall structure with swirling chamber 41 and the fuel passage of convolution access 42 can be made, from
And improve layout.In addition, the more spray orifices of fuel passage structure can be made by the raising of layout, to also can be suitably used for wanting
It asks in the biggish big capacity engine of flow.
Moreover it is possible to obtain following effect: along with the densification of fuel passage entirety, can be reduced dead volume, and can be real
Now spray the raising of the micronized of the injected fuel spray at initial stage, and due to can reduce jet orifice plate 35 on the outside of the fuel passage and
Therefore the welding diameter of a circle of valve seat 32 can inhibit the stress that jet orifice plate 35 is applied to because of fuel pressure, and mention durability
It is high.
Embodiment 2
In present embodiment 2, using Fig. 8~Figure 10, to for making to flow into spray orifice 36 from two convolution accesses 42
The variation that the ratio of fuel generates the structure of difference is illustrated.In addition, the entirety of the fuel injection valve due to present embodiment 2
Structure is identical as above embodiment 1, therefore, continues to use Fig. 1, and omit the explanation of each section.
In the example depicted in fig. 8, the convolution of central axis side is returned with the communication direction of access 42a towards swirling chamber 41 than peripheral side
Rotation is more biased towards with the communication direction of access 42b towards swirling chamber 41 in orifice center 36a.Whereby, from central axis side convolution access
The fuel stream (the arrow 5a in figure) that 42a is flowed into swirling chamber 41 is flowed into from peripheral side convolution with access 42b to swirling chamber 41
Fuel stream (the arrow 5b in figure) compared to being more biased towards in orifice center 36a.
In addition, orifice center 36a is consistent with the center of swirling chamber 41, but shown in Fig. 9 in above embodiment 1
In example, make the position for the spray orifice 36 for being configured at swirling chamber 41 compared to the center of swirling chamber 41 towards mono- sidesway of valve seat central axis Z
Position.Whereby, orifice center 36a configuration is more biased towards at the center relative to swirling chamber 41 in central axis side convolution access 42a's
At end of downstream side (X2 ﹥ X1).
In addition, in above embodiment 1, by the convolution of central axis side with access 42a's and peripheral side convolution access 42b
Duct width is set as equal (Y1=Y2), and passage sections product is set as equal, but in the example depicted in fig. 10, it is set to
Keep the duct width Y1 of central axis side convolution access 42a (Y1 ﹥ bigger with the duct width Y2 of access 42b than peripheral side convolution
Y2), and the passage sections product of two convolution accesses 42 is different.
By using structure as Fig. 8~Figure 10, it can increase from central axis side convolution access 42a and pass through swirling chamber 41
The amount of the fuel of spray orifice 36 is flowed into, and it is poor that the ratio for the fuel for flowing into spray orifice 36 from two convolution accesses 42 can be made to generate.This
Outside, by combining the structure of Fig. 8~Figure 10, so as to further increase difference.For example, it is also possible to make the knot of Fig. 9 and Figure 10
Structure combination, and make a convolution access 42 than another convolution access 42 be partial to orifice center 36a and with swirling chamber 41
Connection, and make the passage sections product of two convolution accesses 42 different.
In addition, though making to pass through swirling chamber from central axis side convolution access 42a in Fig. 8~example shown in Fig. 10
41 to spray orifice 36 flow into fuel amount increase, but can also make from peripheral side convolution access 42b pass through swirling chamber 41 to
The amount for the fuel that spray orifice 36 flows into increases.For example, it is also possible to make orifice center 36a configuration the center relative to swirling chamber 41 more
It is partial at the end of downstream side of peripheral side convolution access 42b.
According to the present embodiment 2, due in the same manner as above embodiment 1, can make to export from spray orifice 36b spray it is hollow
Coniform fuel liquid film 51 it is circumferential in uneven thickness, therefore, avoid fuel liquid film by making adjacent injected fuel spray
The mode of 51 most thick part 51a interferes, so as to make the compact overall structure of fuel passage, and can obtain with it is above-mentioned
The identical effect of embodiment 1.
Embodiment 3
Figure 11 shows the structure and fuel stream of the front end of the fuel injection valve of embodiment of the present invention 3.This embodiment party
The fuel injection valve 1 of formula 3 includes the inclined spray orifice 36A in plate thickness direction relative to jet orifice plate 35, using as make from spray orifice export
The circumferential means in uneven thickness of the fuel liquid film 51 of the hollow cone shape of 36b injection.In addition, due to present embodiment 3
Fuel injection valve overall structure it is identical as above embodiment 1, therefore continue to use Fig. 1, and omit the explanation of each section.
Figure 12 be from from arrow side in Figure 11 with the cross-sectional view of the part indicated D-D.As shown in figure 12, present embodiment
The spray orifice 36A of 3 fuel injection valve downstream rolls towards valve seat central axis Z oblique from upstream side.
By make spray orifice 36A tilt, so that the fuel for being applied with convolution in swirling chamber 41 be made to be flowed into spray orifice 36A
When, the degree of the fuel removing at the circumferential position of spray orifice entrance is different, therefore, the inner wall along spray orifice 36A can be made to be formed
Fuel liquid film 50 it is circumferential in uneven thickness, as a result, the fuel for exporting the hollow cone shape that 36b sprays from spray orifice can be made
Liquid film 51 it is circumferential in uneven thickness.
According to the present embodiment 3, due in the same manner as above embodiment 1, can make to export from spray orifice 36b spray it is hollow
Coniform fuel liquid film 51 it is circumferential in uneven thickness, therefore, avoid fuel liquid film by making adjacent injected fuel spray
The mode of 51 most thick part 51a interferes, so as to make the compact overall structure of fuel passage, and can obtain with it is above-mentioned
The identical effect of embodiment 1.
Embodiment 4
Figure 13 and Figure 14 is the top view for indicating the front end of fuel injection valve of embodiment of the present invention 4.In above-mentioned reality
It applies in 1~embodiment of mode 3, is illustrated in case where the number of swirling chamber 41 and spray orifice 36,36A is three,
But it's not limited to that for swirling chamber 41 and the number of spray orifice 36,36A.
Figure 13 indicates the example including four swirling chambers 41 and spray orifice 36, and Figure 14 indicates to include two swirling chambers 41 and spray orifice
36 example.In addition, in the example shown in Figure 13 and Figure 14, be multiple configurations of spray orifices 36 on the same circumference, but
It can not necessarily on the same circumference.In this way, can also be obtained and above-mentioned reality even if changing the number of swirling chamber 41 and spray orifice 36
Apply the same effect of mode 1.
In addition, in 1~embodiment of embodiment 4, for the integrally-built densification or dead volume of fuel passage
Reduce, and is arranged the integrated shared combustion of upstream portion of the convolution of central axis side access 42a and peripheral side convolution access 42b
Expect incoming line 43, still, the case where and setting fuel passage less in the number of swirling chamber 41 needs sufficient space or dead
The case where small volume etc., it is not necessary to make the upstream integrally of two convolution accesses 42.
In addition, the present invention can freely combine each embodiment in the range of foregoing invention or by each embodiment party
Formula is appropriately deformed, omits.For example, being directed to the variation shown in embodiment 2, moreover it is possible to be applicable in embodiment 3 and show
The inclined spray orifice 36A in the plate thickness direction relative to jet orifice plate 35.
The present invention can be used as the fuel injection valve for supplying fuel for the internal combustion engine etc. to automobile.
Claims (12)
1. a kind of fuel injection valve, comprising: valve seat, the valve seat have opening portion in downstream side；Spool, the spool by with
The abutting of the valve seat separates to control the opening and closing of fuel passage；And jet orifice plate, the jet orifice plate are fixed on described
The downstream side of valve seat, and there are perforative multiple spray orifices on plate thickness direction, which is characterized in that
The upstream-side end surface of the jet orifice plate is provided with recess portion, the recess portion is opposite with the opening portion of the valve seat, and
And diameter is bigger than the diameter of the opening portion, multiple spray orifice configurations are more leaned in the opening portion of the inside than the recess portion
At the position of the peripheral side of the jet orifice plate,
In the inside of the recess portion, multiple swirling chambers and convolution access are provided with, as a part of the fuel passage,
Wherein, multiple swirling chambers make the fuel swirl for flowing into each spray orifice, the upstream side end of the convolution access with
The opening portion of the valve seat is connected to, and end of downstream side is connected to the swirling chamber,
The spray orifice, the swirling chamber and the convolution are configured to the injected fuel spray for making to eject from each spray orifice with access
From the state splitting of hollow coniform circumferential fuel liquid film in uneven thickness, become combustion by the state of fuel liquidus
The state of feed liquid drop, and the fuel liquid film ejected from the spray orifice adjacent to each other is in the state than becoming fuel liquidus
At the position of position upstream side, interfered with each other in a manner of avoiding the most thick part of circumferential thickness.
2. fuel injection valve as described in claim 1, which is characterized in that
The convolution access includes: central axis side convolution access, the central axis side convolution access make fuel relative to
The center of the swirling chamber is flowed into towards valve seat central axis side；And access is used in peripheral side convolution access, the peripheral side convolution
Flow into fuel towards the peripheral side of the jet orifice plate relative to the center of the swirling chamber, central axis side convolution access and
The peripheral side convolution access in a manner of being directed toward the direction being mutually offset relative to the center of the swirling chamber with described time
Revolve room connection.
3. fuel injection valve as claimed in claim 2, which is characterized in that
The convolution is configured to make to pass through the combustion that the swirling chamber flows into the spray orifice from a convolution with access with access
Expect different from the ratio of fuel that the swirling chamber flows into the spray orifice is passed through with access from convolution described in another.
4. fuel injection valve as claimed in claim 3, which is characterized in that
One convolution is being more biased towards with access in the center of the entrance side of the spray orifice with access than convolution described in another
Place is connected to the swirling chamber.
5. fuel injection valve as claimed in claim 2, which is characterized in that
The central axis side convolution is different from the passage sections product of peripheral side convolution access with access.
6. fuel injection valve as claimed in claim 3, which is characterized in that
The central axis side convolution is different from the passage sections product of peripheral side convolution access with access.
7. such as fuel injection valve described in any one of claims 1 to 6, which is characterized in that
A part of convolution access is made of the side wall of the recess portion.
8. such as fuel injection valve described in any one of claims 1 to 6, which is characterized in that
The convolution is arranged to make the identical direction in convolution direction of the fuel in multiple swirling chambers with access.
9. such as fuel injection valve described in any one of claims 1 to 6, which is characterized in that
The spray orifice is arranged in such a way that the center of the center of entrance side and the swirling chamber is consistent.
10. such as fuel injection valve described in any one of claims 1 to 6, which is characterized in that
The spray orifice is more biased towards relative to the center of the swirling chamber in convolution access with the center of entrance side
The mode of the end of downstream side is arranged.
11. such as fuel injection valve described in any one of claims 1 to 6, which is characterized in that
The spray orifice is tilted relative to the plate thickness direction of the jet orifice plate.
12. such as fuel injection valve described in any one of claims 1 to 6, which is characterized in that
Multiple spray orifices equally spaced configure on the same circumference.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016093607A JP6190917B1 (en) | 2016-05-09 | 2016-05-09 | Fuel injection valve |
| JP2016-093607 | 2016-05-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107355328A CN107355328A (en) | 2017-11-17 |
| CN107355328B true CN107355328B (en) | 2019-05-14 |
Family
ID=59720384
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611253694.5A Expired - Fee Related CN107355328B (en) | 2016-05-09 | 2016-12-30 | Fuel injection valve |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6190917B1 (en) |
| CN (1) | CN107355328B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2568467A (en) * | 2017-11-15 | 2019-05-22 | Delphi Automotive Systems Lux | Injector |
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| JP2003336563A (en) * | 2002-05-17 | 2003-11-28 | Keihin Corp | Fuel injection valve |
| JP2008280981A (en) * | 2007-05-14 | 2008-11-20 | Hitachi Ltd | Fuel injection device and internal combustion engine mounting the same |
| CN102369350A (en) * | 2009-03-30 | 2012-03-07 | 株式会社京浜 | Fuel injection valve |
| CN203161403U (en) * | 2012-03-21 | 2013-08-28 | 日立汽车系统株式会社 | Fuel injection valve |
| CN103717875A (en) * | 2011-08-08 | 2014-04-09 | 三菱电机株式会社 | Fuel injection valve |
| JP2015206332A (en) * | 2014-04-23 | 2015-11-19 | 三菱電機株式会社 | Fuel injection valve, spray generator with fuel injection valve, and spark ignition internal combustion engine |
| JP2015227656A (en) * | 2014-05-09 | 2015-12-17 | 株式会社エンプラス | Fuel injector nozzle plate |
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| US5570841A (en) * | 1994-10-07 | 1996-11-05 | Siemens Automotive Corporation | Multiple disk swirl atomizer for fuel injector |
| JP4017508B2 (en) * | 2002-11-29 | 2007-12-05 | 株式会社デンソー | Fuel injection device |
| JP4154317B2 (en) * | 2003-04-25 | 2008-09-24 | トヨタ自動車株式会社 | Fuel injection valve |
| JP2007138746A (en) * | 2005-11-15 | 2007-06-07 | Hitachi Ltd | Fuel supply device |
| JP2008255912A (en) * | 2007-04-06 | 2008-10-23 | Hitachi Ltd | Cylinder injection internal combustion engine and fuel injection method for cylinder injection internal combustion engine |
| JP5134063B2 (en) * | 2010-11-01 | 2013-01-30 | 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 |
| DE102012211191A1 (en) * | 2012-06-28 | 2014-01-02 | Robert Bosch Gmbh | Valve for metering fluid |
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2016
- 2016-05-09 JP JP2016093607A patent/JP6190917B1/en not_active Expired - Fee Related
- 2016-12-30 CN CN201611253694.5A patent/CN107355328B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003336563A (en) * | 2002-05-17 | 2003-11-28 | Keihin Corp | Fuel injection valve |
| JP2008280981A (en) * | 2007-05-14 | 2008-11-20 | Hitachi Ltd | Fuel injection device and internal combustion engine mounting the same |
| CN102369350A (en) * | 2009-03-30 | 2012-03-07 | 株式会社京浜 | Fuel injection valve |
| CN103717875A (en) * | 2011-08-08 | 2014-04-09 | 三菱电机株式会社 | Fuel injection valve |
| CN203161403U (en) * | 2012-03-21 | 2013-08-28 | 日立汽车系统株式会社 | Fuel injection valve |
| JP2015206332A (en) * | 2014-04-23 | 2015-11-19 | 三菱電機株式会社 | Fuel injection valve, spray generator with fuel injection valve, and spark ignition internal combustion engine |
| JP2015227656A (en) * | 2014-05-09 | 2015-12-17 | 株式会社エンプラス | Fuel injector nozzle plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017203379A (en) | 2017-11-16 |
| JP6190917B1 (en) | 2017-08-30 |
| CN107355328A (en) | 2017-11-17 |
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