CN106523090B - Booster-type injector - Google Patents
Booster-type injector Download PDFInfo
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- CN106523090B CN106523090B CN201610912000.8A CN201610912000A CN106523090B CN 106523090 B CN106523090 B CN 106523090B CN 201610912000 A CN201610912000 A CN 201610912000A CN 106523090 B CN106523090 B CN 106523090B
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- Prior art keywords
- injector
- iron core
- mouth
- booster
- plunger
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention is directed to overcome injection pressure existing for existing automobile engine injector low,The problems such as atomization quality is poor,Provide a kind of booster-type injector,Including injector body,Injector body is welded by hollow injector shell upper body and hollow injector shell lower body,The hollow portion of injector shell upper body and injector shell lower body constitutes fuel cavity,There is fuel inlet at the top of injector shell upper body,Fuel inlet is connected to fuel cavity,Injector shell lower body bottom is provided with the injector mouth being connected to fuel cavity,It is characterized in that,It further include electromagnetism valve assembly,Pressure maintaining control valve and injection cock valve,Pressure maintaining control valve and injection cock valve cooperation high speed electromagnetic valve assembly ensure that the response speed of booster-type injector,Booster-type injector of the present invention is cheap,Processing technology is simple,Injection is accurate,Spray atomization is high-quality,Nozzle is not easy to accumulate urea crystals and coking particle,It is obviously improved the atomization quality of injector.
Description
Technical field：
The invention belongs to automobile technical fields, are related to a kind of booster-type emitter construction, be adapted for carrying out state four and after
Urea injector, hydrocarbon injector used in the diesel engine of emission regulation.
Background technology：
With automobile diesel oilization and national emission regulation it is increasingly stringent, solving the emission problem of diesel engine seems extremely
Urgently.Widely used selective catalytic reduction (SCR) technology in the whole world answers counterweight with diesel particulate trap (DPF) technology at present
Diesel engine emission problem.For SCR technology come say presently, there are the problem of be existing urea injector supply pressure it is relatively low,
Its pressure is usually no more than 0.9MPa, therefore the urea atomization quality that urea injector ejects is poor, to reduce urea water
The utilization rate of solution；And it is easy to form urea crystals around the needle-valve body on existing urea injector and injection hole body and causes to spray
Hole plug, thus it is poor to the treatment effect of vehicle exhaust.DPF technologies are sayed the problem is that when granules regeneration generates
High temperature make hydrocarbon injector coking serious, to influence injection fuel oil atomization quality.
Invention content：
The object of the present invention is to provide a kind of booster-type injectors, and injector can be realized by injector itself supercharging
The nozzle of high-pressure injection and external-open has self-cleaning function, can remove the urea crystals and coking particle of generation, and tie
Structure is simple, manufacturing cost is low.
The specific technical solution that the present invention uses is as follows：
A kind of booster-type injector, including injector body, injector body is by hollow injector shell upper body and hollow
Injector shell lower body be welded, the hollow portion of injector shell upper body and injector shell lower body constitutes fuel cavity, injector shell
There are fuel inlet, fuel inlet to be connected to fuel cavity at the top of upper body, injector shell lower body bottom is provided with to be connected to fuel cavity
Injector mouth, which is characterized in that further include electromagnetism valve assembly, pressure maintaining control valve and injection cock valve；
Electromagnetism valve assembly include an electromagnet being nested on injector body center outer surface, one be located at fuel cavity
The columnar armature of the ladder circle to move up and down at middle part and the iron core positioned at armature lower part, a wound around coil are controlled by outside
Unit power supply and plastic packaging is inside electromagnet, iron core is fixed on the inner wall in the middle part of fuel cavity, iron core be it is cylindrical and with to
The groove of sunken inside, the outer diameter of iron core are less than the internal diameter in the middle part of fuel cavity, the gap between the outer diameter and fuel cavity internal diameter of iron core
Channel is constituted, for mandrel bottom tool there are one the center through hole with the cooperation of armature lower cylindrical, it is logical that armature lower cylindrical is inserted into center
Hole, the outer diameter of armature Upper cylindrical and the internal diameter in the middle part of fuel cavity are equal, the bottom surface of armature Upper cylindrical and the groove top of iron core
Main spring is housed between face, on the Upper cylindrical of armature there are multiple longitudinally disposed permissible liquid to flow to injector nozzle head
Circumferential through-hole has the inlet that multiple permissible liquid being laterally arranged flow to injector mouth from channel on armature bottom surface；
Pressure maintaining control valve is arranged below iron core, including the columnar pressure retaining parts of a ladder circle and a pressurize spring,
Gap between the upper surface of pressure retaining parts and the lower face of iron core constitutes compression chamber, has on pressure retaining parts Upper cylindrical multiple vertical
To the through-hole of setting, pressurize spring is between pressure retaining parts boss lower surface and fuel cavity bottom groove, in pressurize spring
When tight, the upper surface of pressure retaining parts Upper cylindrical is bonded to cover through-hole with iron core lower face；
Injection cock valve is located at below pressure maintaining control valve and is arranged in injector mouth, including plunger, damping spring, spray
Emitter mouth is nested in the lower part of plunger cylinder, and the valve that section is cone shape is sealed and installed in the internal diameter of injector mouth
Seat, valve seat lower section are nozzle, and plunger tip has cross sectional shape plunger sealing identical with valve seat, the plunger of damping spring suit
Middle and upper part, one end of damping spring resists the upper surface of injector mouth, and the other end of damping spring resists plunger top
The lower face of fixed ring is vertically arranged with the oil grooves of multiple perforation injector mouth axial directions, plunger on the internal diameter of injector mouth
With the axis coaxle of injector body.
Further technical solution includes：
Fuel inlet at the top of the injector shell upper body is internally provided with a filter element；
An O-ring and a gear are sequentially installed with outside fuel inlet at the top of injector shell upper body from top to bottom
Circle；
There are one rectangular seal rings for installation in injector shell lower body lower external face；
Total circulation area of multiple oil grooves is more than the circulation area of injector body；
The outer diameter of the injector mouth is weldingly fixed in the internal diameter of injector shell lower body bottom.
Booster-type injector of the present invention has many merits：Electromagnet is fitted in fuel injection housing upper body and fuel injector
The mechanical body periphery of shell lower body composition, this structure have the advantages that processing technology degeneracy and replaceable electromagnet；High-speed electromagnetic valve
Assembly ensure that the response speed of booster-type injector so that armature switch is rapid, and injector emitted dose accurately controls；It is outward opening
Injector mouth have self-cleaning function make nozzle be not easy to accumulate urea crystals and coking particle
Booster-type injector of the present invention is cheap, processing technology is simple；Spray accurate, spray atomization quality
It is good；There is nozzle self-cleaning function to be not easy to accumulate urea crystals and coking particle.
Description of the drawings
Fig. 1 is the sectional view of booster-type injector of the present invention；
Fig. 2 is the enlarged cross-sectional view of injector injection cock valve；
Fig. 3 is the sectional arrangement drawing of injector valve seat and plunger；
Fig. 4 is the enlarged cross-sectional view of the electromagnetism valve assembly of injector；
In figure：1. injector body, the 2. injector axis of symmetry, 3. nozzles, 4. injector shell upper bodies, 5. solenoid valves are total
At, 6. injection cock valves, 7. electromagnet, 8. armature, 9. main springs, 10. wound around coil, 11. iron cores, 12. pressure retaining parts, 13.
Pressurize spring, 14. fixed rings, 15. damping springs, 16. plungers, 17. injector mouths, 19. injector shell lower bodies, 20. baffle rings,
21.O type circles, 22. filter elements, 23. rectangular seal rings, 24. seal member aperture angles, 25. valve seats, 26. plunger sealings,
27. through-hole, 28. fuel oil through-holes, 29. circumferential through-holes, 30. channels, 31. inlets, the through-hole on 32. pressure retaining parts, 33. injections
Device lift, 34. compression chambers, 35. center through hole.
Specific embodiment
The specific embodiment that according to the present invention will be described in detail below with reference to the accompanying drawings.
A kind of booster-type injector, including injector body 1, injector body 1 is by hollow injector shell upper body 4 in
Empty injector shell lower body 19 is welded, and the hollow portion of injector shell upper body 4 and injector shell lower body 19 constitutes fuel cavity, spray
4 top of emitter shell upper body has fuel inlet, fuel inlet to be connected to fuel cavity, and 19 bottom of injector shell lower body is provided with and fuel
The injector mouth 17 of chamber connection, further includes electromagnetism valve assembly 5, pressure maintaining control valve and injection cock valve 6；
Electromagnetism valve assembly 5 includes that an electromagnet being nested on 1 center outer surface of injector body 7, one is located at combustion
Expect the columnar armature 8 of the ladder circle to move up and down in the middle part of chamber and the iron core 11 positioned at 8 lower part of armature, a wound around coil 10
By external control unit outside power supply and plastic packaging is inside electromagnet 7, and iron core 11 is fixed on the inner wall in the middle part of fuel cavity, and iron core 11 is
Cylindrical and with the groove being recessed inwardly, the outer diameter of iron core 11 is less than the internal diameter in the middle part of fuel cavity, the outer diameter of iron core 11 and combustion
Expect that the gap between intracavitary diameter constitutes channel 30, there are one the center through hole with the cooperation of 8 lower cylindrical of armature for 11 bottom of iron core tool
35,8 lower cylindrical of armature is inserted into center through hole 35, and the outer diameter of 8 Upper cylindrical of armature and the internal diameter in the middle part of fuel cavity are equal, armature
Main spring 9 is housed between the bottom surface of 8 Upper cylindricals and the groove top surface of iron core 11, is had on the Upper cylindrical of armature 8 multiple vertical
The circumferential through-hole 29 of injector nozzle head 17 is flowed to the permissible liquid of setting, have on 8 bottom surface of armature it is multiple be laterally arranged can
Liquid is allowed to flow to the inlet 31 of injector mouth 17 from channel 30；
Pressure maintaining control valve is arranged below iron core 11, including the columnar pressure retaining parts 12 of a ladder circle and a pressurize bullet
Spring 13, the gap between the upper surface and the lower face of iron core 11 of pressure retaining parts 12 constitute compression chamber 34,12 top of pressure retaining parts
There are multiple longitudinally disposed through-holes 32 on cylinder, pressurize spring 13 is located at 12 boss lower surface of pressure retaining parts and fuel cavity bottom is recessed
Between slot, when pressurize spring 13 is tensioned, the upper surface of 12 Upper cylindrical of pressure retaining parts is bonded to hide with 11 lower face of iron core
Firmly through-hole 32；
Injection cock valve 6 is located at below pressure maintaining control valve and is arranged in injector mouth 17, including plunger 16, damping bullet
Spring 15, injector mouth 17 are nested in the lower part of 16 cylinder of plunger, and being sealed and installed with section in the internal diameter of injector mouth 17 is
The valve seat 25 of cone shape, 25 lower section of valve seat is nozzle 3, and there is section shape and size column identical with valve seat 25 in 16 end of plunger
Sealing 26 is filled in, the middle and upper part for the plunger 16 that damping spring 15 is set with, one end of damping spring 15 resists injector mouth 17
Upper surface, the other end of damping spring 15 resist the lower face of the fixed ring 14 on 16 top of plunger, the internal diameter of injector mouth 17
On be vertically arranged with multiple 17 axial oil grooves 27 of perforation injector mouth, the axis coaxle of plunger 16 and injector body 1.
As shown in Figure 1：A kind of injector body 1 of booster-type injector, axis are the injector axis of symmetry 2, nozzle 3
Liquid can be sprayed into its working environment.Injector shell upper body 4,19 annular solder of injector shell lower body collectively constitute together
The hollow portion of injector body 1, injector shell upper body 4 and injector shell lower body 19 constitutes fuel cavity.The middle part of injector body 1
One electromagnetism valve assembly 5 is set, and the lower part of injector body 1 is provided with injection cock valve 6, and injection cock valve 6 is total by solenoid valve
At 5 drivings, to control the amount of liquid for flowing through nozzle 3.
Electromagnetism valve assembly 5 includes the electromagnet 7 of a solenoid type, and electromagnet 7 is fixed on the outer of 1 middle part of injector body
The fixed position (electromagnetic force maximum position) on surface, when electromagnet 7 is powered, the electromagnetic force that electromagnet 7 generates makes 8 grams of armature
The spring force for taking main spring 9 moves downward and injection cock valve 6 is finally moved to open position from closed position.
Electromagnet 7 includes：One wound around coil 10, wound around coil 10 is by external control unit outside power supply and plastic packaging is in electromagnet
Inside 7；Iron core 11, which is fixed on inside injector shell lower body 19, on the inner wall in the middle part of fuel cavity and with injector shell
19 inner wall annular welds of lower body became one, which is provided with the inlet 31 that multiple permissible liquid flow to the nozzle 3.
Gap between the upper surface and the lower face of iron core 11 of pressure retaining parts 12 constitutes compression chamber 34, when armature 8 is downward
After movement covers inlet 31, pressure retaining parts 12 can be pushed to the liquid pressing in compression chamber 34, the pressure that fluid under pressure generates
It moves downward, so that fluid under pressure is flowed by the through-hole 32 on pressure retaining parts in fuel cavity lower chamber.When under fuel cavity
After portion's intracavitary boost pressure is more than the elastic pre-stress of damping spring 15, plunger 16 moves downward so that plunger sealing 26 is detached from
Valve seat 25, pressurized fluid, which is sprayed by the through-hole 27 of nozzle 3 from valve seat 25, forms spraying；It causes to press when armature 8 moves upwards
Pressure declines in contracting chamber 34, and the insufficient pressure that liquid generates is to overcome the elastic pre-stress of damping spring 15 to make plunger sealing
26 are bonded formation sealing with the valve seat 25.Armature 8 continues upward movement, and pressure continues to decline in compression chamber 34, so as to cause
Pressure is not enough to overcome the spring force of pressurize spring 13 that pressure retaining parts 12 is made to be moved upwards up to sealing surface and be formed in compression chamber 34
Sealing.The fluid pressure that pressure retaining parts 12 seals at this time is still high pressure, and such structure makes injector body 1 in lower task
It can build rapidly and press and pressurization can be played to liquid；It is external when armature 8, which moves upward to, exposes 31 channel of inlet
Liquid is entered in compression chamber 34 by inlet 31 to be ready for next task.
As shown in Figure 2：Valve seat 25 be section cone and with 17 fitted seal of injector mouth, outside the injector mouth 17
Diameter is welded as a whole with injector shell lower body 19 to ensure the sealed bottom of injector body 1；17 endoporus of injector mouth accommodates
Plunger 16 is to form the guiding to plunger 16.
The end of plunger 16 is plunger sealing 26, which can be with 25 fitted seal liquid of valve seat, plunger
The bottom edge of sealing 26 is located on the lower face of injector mouth 17, valve seat 25 be section cone shape and with the plunger
The frustoconical shape complementary fit of sealing 26, and nozzle head 17 is pushed by damping spring 15 make the bottom of plunger sealing 26
Portion and the cooperation of 25 Ministry of Revenue of valve seat are resisted against on the lower face of the nozzle head 17.When injection cock valve 6 is from change is closed to opening
When, plunger sealing 26 is moved downward along axis 2, i.e., is moved along with the liquid direction of the supply.
In the open position of injection cock valve 6, plunger sealing 26 is detached with valve seat 25, and it is annulus to form a section
Shape, the spray orifice that section is cone, the spray orifice allowing liq pass through, to form the spraying of a hollow taper, the spray angle
Degree is about the aperture angle 24 (aperture angle for being equal to valve seat 25) of plunger sealing 26.
As shown in Figure 3：17 endoporus of injector mouth accommodates plunger 16 and is oriented to be formed, and the periphery of endoporus is provided with multiple circles
Arc oil groove 27 can reach so as to liquid at valve seat 25.The flow of total circulation area of multiple oil grooves 27 is greater than injector master
The quiescent flow of body 1.Before injector body 1 starts assembly, injection cock valve 6 must be welded first.First by plunger 16
It is inserted in nozzle 3, nozzle 3 is the sealing position for spraying mouth 17, and nozzle 3 plays sealing function with the cooperation of plunger sealing 26.
Damping spring 15 is inserted on plunger 16, fixed ring 14, which is inserted in plunger 16, adjusts 15 pretightning force of damping spring to specified numerical value,
Then fixed ring 14 and 16 top annular of plunger are welded as a whole.
As shown in Figure 4：There is armature 8 circumferential through-hole 29 of multiple permissible liquid towards spout 3, circumferential through-hole 29 always to flow
The flow of logical area is greater than the circulation area of injector 1.8 lower end surface of armature is provided with pilot hole and main spring 9 is being oriented to
It fixes and is held in position in hole.
There are one the center through hole 35 of sealing liquid and multiple permissible liquid are cooperatively formed with armature for the tool of secured core 11
The inlet 31 of nozzle 3 is flowed to from channel 30, channel 30 and the respective total circulation area flow of inlet 31 are greater than injector 1
Circulation area.When valve seat 25 is closed, existing clearance distance is injection between 8 lower surface of 11 upper surface of secured core and armature
Device lift 33.11 upper position of secured core is provided with pilot hole and main spring 9 is made to be fixed and held at position in pilot hole.Center
35 internal diameter of through-hole is formed with 8 lower cylindrical diametric fit of armature and is sealed, therefore center through hole 35 can also be that the formation of armature 8 is oriented to.
When injector body 1 is in the closed position, between existing between 11 upper surface of 8 lower face of armature and secured core
Stand-off distance is from for injector lift 33.In assembly, corresponding armature can be selected according to the quiescent flow difference of injector body 1
8 and secured core 11 adjust injector lift 33.Such assembly can make injector body 1 can adapt to various discharge capacity hairs
Motivation demand is without increasing extra cost.
Injector body 1 is additionally provided with a pressure retaining parts 12 and pressurize spring 13.In the spring-force driven dual of pressurize spring 13
Under, the upper end of pressure retaining parts 12 is bonded to cover the formation sealing surface of through-hole 32 with 11 inner face of iron core.
As shown in Figure 3：Multiple arc-shaped oil grooves 27 on injector mouth 17 can reach so as to liquid at valve seat 25.Liquid
Body realizes entire circumferentially uniform distribution on 25 top of valve seat, to avoid the inhomogeneities of injection liquid.
As shown in Figure 1：One rectangular seal ring 23 is mounted on injector shell lower body 19, and it acts as by matching with adapter
It closes to generate sealing；One filter element 22 is assemblied in inside injector shell upper body 4, which can be filtered through spray
Little particle impurity in the fuel oil of oily device 1；One O-ring 21 and a baffle ring 20 are assemblied in 4 outside of injector shell upper body and are used for
Ensure that external adapter and the connection of injector body 1 seal.
Above-mentioned injector 1 shows lot of advantages：Simple in structure and processing cost is low, and very high injection essence is realized in injection
Degree and stability.And the injection pressure of injector can be increased in the case where not increasing cost.To be obviously improved injection
The atomization quality of device.
Claims (6)
1. booster-type injector, including injector body (1), injector body (1) by hollow injector shell upper body (4) and in
Empty injector shell lower body (19) is welded, and the hollow portion of injector shell upper body (4) and injector shell lower body (19) constitutes combustion
Expect chamber, there is fuel inlet, fuel inlet to be connected to fuel cavity at the top of injector shell upper body (4), injector shell lower body (19) bottom
It is provided with the injector mouth (17) being connected to fuel cavity, which is characterized in that further include electromagnetism valve assembly (5), pressure maintaining control valve
With injection cock valve (6)；
Electromagnetism valve assembly (5) is located at including an electromagnet (7) being nested on injector body (1) center outer surface, one
The columnar armature of the ladder circle to move up and down (8) in the middle part of fuel cavity and the iron core (11) positioned at armature (8) lower part, one twines
Coiling (10) is by external control unit outside power supply and plastic packaging is in electromagnet (7) inside, and iron core (11) is fixed in the middle part of fuel cavity
On inner wall, iron core (11) is cylindrical and with the groove being recessed inwardly, and the outer diameter of iron core (11) is less than interior in the middle part of fuel cavity
Diameter, the gap between the outer diameter and fuel cavity internal diameter of iron core (11) constitute channel (30), and there are one iron core (11) bottom tools and rank
The center through hole (35) of iron (8) lower cylindrical cooperation, armature (8) lower cylindrical are inserted into center through hole (35), armature (8) top circle
The outer diameter of column and the internal diameter in the middle part of fuel cavity are equal, between the bottom surface and the groove top surface of iron core (11) of armature (8) Upper cylindrical
Equipped with main spring (9), on the Upper cylindrical of armature (8) there are multiple longitudinally disposed permissible liquid to flow to injector nozzle head
(17) circumferential through-hole (29) has on armature (8) bottom surface multiple permissible liquid being laterally arranged to be flowed to from channel (30) and sprays
The inlet (31) of device mouth (17)；
Pressure maintaining control valve setting is below iron core (11), including a columnar pressure retaining parts of ladder circle (12) and a pressurize bullet
Spring (13), the gap between the upper surface and the lower face of iron core (11) of pressure retaining parts (12) constitute compression chamber (34), pressurize portion
There are multiple longitudinally disposed through-holes (32), pressurize spring (13) to be located at pressure retaining parts (12) boss following table on part (12) Upper cylindrical
Between face and fuel cavity bottom groove, when pressurize spring (13) are tensioned, the upper surface of pressure retaining parts (12) Upper cylindrical and iron
Core (11) lower face is bonded to cover through-hole (32)；
Injection cock valve (6) is located at below pressure maintaining control valve and setting is in injector mouth (17), including plunger (16), damping
Spring (15), injector mouth (17) are nested in the lower part of plunger (16) cylinder, peace are sealed in the internal diameter of injector mouth (17)
It is nozzle (3) below valve seat (25), there are cross sectional shape and valve in plunger (16) end equipped with the valve seat (25) that section is cone shape
The identical plunger sealing (26) of seat (25), the middle and upper part of the plunger (16) of damping spring (15) suit, damping spring (15)
One end resists the upper surface of injector mouth (17), and the other end of damping spring (15) resists the fixed ring on plunger (16) top
(14) lower face is vertically arranged with the oil grooves of multiple perforation injector mouth (17) axial directions on the internal diameter of injector mouth (17)
(27), the axis coaxle of plunger (16) and injector body (1).
2. booster-type injector according to claim 1, which is characterized in that at the top of the injector shell upper body (4)
Fuel inlet is internally provided with a filter element (22).
3. booster-type injector according to claim 1, which is characterized in that the combustion at the top of injector shell upper body (4)
It is sequentially installed with an O-ring (21) and a baffle ring (20) from top to bottom outside material entrance.
4. booster-type injector according to claim 1, which is characterized in that in injector shell lower body (19) lower external face
There are one rectangular seal rings (23) for installation.
5. booster-type injector according to claim 1, which is characterized in that total circulation of multiple oil grooves (27)
Area is more than the circulation area of injector body (1).
6. booster-type injector according to claim 1, which is characterized in that the outer diameter of the injector mouth (17) welds
It connects and is fixed in the internal diameter of injector shell lower body (19) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610912000.8A CN106523090B (en) | 2016-10-20 | 2016-10-20 | Booster-type injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610912000.8A CN106523090B (en) | 2016-10-20 | 2016-10-20 | Booster-type injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106523090A CN106523090A (en) | 2017-03-22 |
| CN106523090B true CN106523090B (en) | 2018-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610912000.8A Active CN106523090B (en) | 2016-10-20 | 2016-10-20 | Booster-type injector |
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| Country | Link |
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| CN (1) | CN106523090B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457784A (en) * | 2018-01-05 | 2018-08-28 | 中国第汽车股份有限公司 | A kind of outward opening gasoline direct spray oil sprayer |
| CN108413051A (en) * | 2018-03-28 | 2018-08-17 | 柳州源创电喷技术有限公司 | The valve member of big flow electromagnetic type injector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298856A (en) * | 2007-04-30 | 2008-11-05 | 玛涅蒂玛瑞利动力系公开有限公司 | Outward opening fuel injector |
| CN102094736A (en) * | 2006-09-25 | 2011-06-15 | 株式会社日立制作所 | Fuel injection valve |
| CN105351130A (en) * | 2015-11-27 | 2016-02-24 | 哈尔滨工程大学 | Pressurization no-leakage piezoelectric control type gas injection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4858160A (en) * | 1988-03-18 | 1989-08-15 | Cascade Microtech, Inc. | System for setting reference reactance for vector corrected measurements |
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2016
- 2016-10-20 CN CN201610912000.8A patent/CN106523090B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094736A (en) * | 2006-09-25 | 2011-06-15 | 株式会社日立制作所 | Fuel injection valve |
| CN101298856A (en) * | 2007-04-30 | 2008-11-05 | 玛涅蒂玛瑞利动力系公开有限公司 | Outward opening fuel injector |
| CN105351130A (en) * | 2015-11-27 | 2016-02-24 | 哈尔滨工程大学 | Pressurization no-leakage piezoelectric control type gas injection device |
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| CN106523090A (en) | 2017-03-22 |
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