CN105840376A - No-static-leakage low-inertia oil sprayer module and oil sprayer - Google Patents
No-static-leakage low-inertia oil sprayer module and oil sprayer Download PDFInfo
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- CN105840376A CN105840376A CN201610347876.2A CN201610347876A CN105840376A CN 105840376 A CN105840376 A CN 105840376A CN 201610347876 A CN201610347876 A CN 201610347876A CN 105840376 A CN105840376 A CN 105840376A
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- pressure oil
- pressure
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- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000000446 fuel Substances 0.000 claims description 56
- 230000003068 static effect Effects 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 206010008469 Chest discomfort Diseases 0.000 claims description 13
- 230000009466 transformation Effects 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 8
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 230000033001 locomotion Effects 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 126
- 239000010720 hydraulic oil Substances 0.000 description 13
- 239000000295 fuel oil Substances 0.000 description 11
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
-
- 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
-
- 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
- F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
- F02M2200/185—Fuel-injection apparatus having means for maintaining safety not otherwise provided for means for improving crash safety
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a no-static-leakage low-inertia oil sprayer module and an oil sprayer, and belongs to the field of oil sprayers. The oil sprayer comprises an oil inlet joint assembly, an insertion piece and an oil sprayer module; and the oil sprayer module includes an oil sprayer body assembly, a magnetic head assembly, a switch valve assembly, a control block and an oil spraying nozzle matching part. The oil sprayer module optimizes the structure of the oil sprayer, guarantees simpler and more reasonable assembly process, is more excellent in sealing effect of the oil sprayer, facilitates precise control of the spraying process, is better in consistency of oil spraying quantities, gives consideration to both high-pressure and low-pressure oil spraying performances of the oil sprayer, optimizes the emission index, is lower in motion inertia of a needle valve, a piston and the like, is low in impact on a needle valve body or the control block in opening or closing of the needle valve, effectively prolongs the service life, and is more stable in spraying process; and when the switch valve assembly is closed, high-pressure oil in a high-pressure cavity and a control cavity is the same in pressure, so that the dynamic leakage is lower, and the oil consumption and the emission of carbon dioxide are reduced.
Description
Technical field
The present invention relates to fuel injector field, in particular to a kind of without static leakage low inertia oil spout
Device assembly and fuel injector.
Background technology
Fuel injector is the accurate device that a kind of machining accuracy is the highest, it is desirable to its dynamic flow range is big,
Anti-clogging and contamination resistance is strong and atomization is good, it receives the fuel injection pulse signal that ECU sends here,
Accurately control fuel injection amount.Fuel injector is by the Kong Shi atomizer similar to conventional fuel injector, hydraulic pressure
Servo-drive system, magnetic valve etc. form.
Domestic exhaust method is increasingly strict, and state more than six emission regulation demands common-rail injector expulsion pressure reaches
To more than 2200bar, and fuel injection rate waveform all can guarantee that first slow rear anxious under each rail pressure, and state at present
Interior common-rail injector expulsion pressure is difficult to reach requirement, current domestic main flow fuel injector motion rod member matter
Amount is big, high frequency response time inertia big, big to seat surface impulsive force so that the service life of fuel injector is shorter.
Summary of the invention
The invention provides a kind of without static leakage low inertia component of oil sprayer, expulsion pressure can be made to reach
To more than 2200bar, and inertia when reducing high frequency response and the impulsive force to seat surface, it is effectively improved
The service life of fuel injector.
Present invention also offers a kind of without static leakage low inertia fuel injector, the injection of fuel injector can be made
Pressure reaches more than 2200bar, and inertia when reducing high frequency response and the impulsive force to seat surface, has
Effect improves the service life of fuel injector.
The present invention is achieved in that
A kind of without static leakage low inertia component of oil sprayer, including oil injector body assembly, magnetic head assembly,
Switch valve assembly, control block and injector nozzle matching parts；
Described oil injector body assembly includes injector body and back leakage connection, and described injector body is arranged
High-pressure oil passage, low pressure oil way and receiving hole, described back leakage connection is had to connect with described low pressure oil way, institute
State receiving hole be arranged at one end of described injector body and connect with described low pressure oil way；
Described magnetic head assembly and described switch valve assembly may be contained within described receiving hole, and described magnetic head is total
Becoming to include magnetic head and magnetic valve spring, described magnetic head is provided with centre bore, and described magnetic valve spring is arranged
In described centre bore, described switch valve assembly includes that switch valve and guide pad, described switch valve run through
Described guide pad, described magnetic valve spring can promote described switch valve to prop up described control block；
Described control block is arranged at one end of described injector body, described control block include high-pressure oil duct,
Low pressure oil duct, oil-feed control hole, fuel-displaced control hole, mesopore and pressure hole, described high-pressure oil duct and institute
Stating high-pressure oil passage connection, described low pressure oil duct connects with described low pressure oil way, described high-pressure oil duct and institute
State and connected with described pressure hole by described oil-feed control hole respectively between mesopore, described fuel-displaced control hole
Corresponding with described switch valve, between described low pressure oil duct and described mesopore by described fuel-displaced control hole even
Lead to and can be disconnected by described switch valve；
Described injector nozzle matching parts is arranged at one end of described control block, and described injector nozzle matching parts includes needle-valve
Body, needle-valve, sleeve, pressure spring and piston, described needle-valve body is even with the front end of described needle-valve joins,
One end of described piston is even with the rear end of described needle-valve body joins, the other end of described piston and described sleeve
Occasionally joining and described mesopore is divided into two parts, the two ends of described pressure spring are respectively held against described piston
With described sleeve, between described needle-valve body with described needle-valve, it is provided with the spray connected with described high-pressure oil passage
Oil pocket；
Control chamber is surrounded, between described control block and described needle-valve body between described sleeve and described mesopore
Surround high pressure chest, between described piston and described needle-valve, surround transformation chamber, described oil-feed control hole and institute
Stating the connection of control chamber, described pressure hole connects with described high pressure chest.
Alternatively, described component of oil sprayer also includes that the tight cap of oil nozzle, the tight cap sleeve of described oil nozzle are located at described
Injector nozzle matching parts and the outside of described control block and threaded between described injector body.
Alternatively, the bottom of described injector body is correspondingly arranged at least with the top of described control block
One correspondence and for wearing or be embedded the first dowel hole of the first alignment pin, and/or described control block
Bottom and to be correspondingly arranged at least one corresponding and for wearing or be embedded the top of described needle-valve body
Second dowel hole of two alignment pins.
Alternatively, described high-pressure oil duct is divided into two sections be interconnected, respectively first paragraph and second segment,
Described first paragraph and described second segment are coaxial shoulder hole, and described first paragraph is relative to described second segment more
Near described high-pressure oil passage, the aperture of described first paragraph is more than the aperture of described second segment.
Alternatively, described low pressure oil duct is channel-shaped and the top being arranged at described control block, described low pressure
Oil duct is for introducing described low pressure oil way, the end of described switch valve by hydraulic oil from described fuel-displaced control hole
End can make described fuel-displaced control hole disconnect with described low pressure oil duct.
Alternatively, described mesopore is coaxial shoulder hole, and the top of described mesopore includes that at least two is different
The same conical surface of shaft of tapering, asks first conical surface and second conical surface respectively, and described first conical surface is relative to described
Second conical surface is less than described second conical surface closer to described injector body, the tapering of described first conical surface
Tapering, the top of described sleeve and described second conical surface gluing, sealing.
Alternatively, the top of described piston is for the bulb with described first conical surface laminating.
Alternatively, described oil-feed control hole includes the oil-feed section that is interconnected and fuel-displaced section, described oil-feed
Section and described fuel-displaced section are and are obliquely installed and for coaxial shoulder hole, described oil-feed section and described hydraulic oil
Road connects, and described fuel-displaced section connects with described mesopore.
Alternatively, described fuel-displaced control hole includes tilting section and the vertical section being interconnected, described inclination
Section is obliquely installed, and described vertical section is vertically arranged, and described tilting section connects with described mesopore, described control
The top of clamp dog is provided with in cross-shaped oil guide groove, described vertical section and described low pressure oil duct it
Between connected by described oil guide groove.
Alternatively, described needle-valve is provided with spiral oil-feed tank, and described needle-valve body is provided with adapter cavity, institute
State adapter cavity to connect with described high-pressure oil passage, by described spiral shell between described adapter cavity and described fuel injection chamber
Precession oil groove connects.
Alternatively, described piston includes multidiameter, and the part being relatively large in diameter of described multidiameter is with described
Needle-valve body is slidably connected, and the part that the diameter of described multidiameter is less is slidably connected with described sleeve, institute
Stating multidiameter and be arranged with pressure adjusting pad, one end of described pressure spring props up described sleeve, the other end
Prop up described pressure adjusting pad.
A kind of without static leakage low inertia fuel injector, including fuel inlet fitting assembly, connector and as above institute
The component of oil sprayer stated, described fuel inlet fitting assembly connects with described high-pressure oil passage, and described connector sets
It is placed in the top of described low pressure oil duct.
Compared with prior art, the invention has the beneficial effects as follows:
1. optimize the structure of fuel injector, it is ensured that assembling process is simpler rationally, the sealing effect of fuel injector
Fruit is more excellent, is more beneficial for the accurate control of course of injection, and the uniformity making distributive value is more preferable, spray
Oil spout performance when high pressure and low pressure taken into account by oil device, optimizes discharge index.
2. the movement inertia of needle-valve and piston etc. is relatively low, to needle-valve body or control block when needle-valve is turned on and off
Impact little, be effectively improved service life, make course of injection more stable.
3., when switch valve assembly is closed, high pressure chest and the hydraulic oil pressure controlled in chamber are equal, dynamic leakage
Measure less, thus reduce oil consumption, the discharge capacity of minimizing carbon dioxide.
4. structure is relatively simple, and part during assembling is less, easy to assembly.
Accompanying drawing explanation
The fuel injector sectional view that Fig. 1 provides for the embodiment of the present invention；
Fig. 2 is the control block sectional view of Fig. 1；
Fig. 3 is the close-up schematic view of Fig. 1；
Fig. 4 is the close-up schematic view of Fig. 1.
Oil injector body assembly 100；Injector body 101；Back leakage connection 102；High-pressure oil passage 103；
Low pressure oil way 104；Receiving hole 105；
Magnetic head assembly 200；Magnetic head 201；Magnetic valve spring 202；
Switch valve assembly 300；Switch valve 301；Guide pad 302；First lift adjusting pad 303；Between
Gap adjusting pad 304；
Control block 400；High-pressure oil duct 401；Low pressure oil duct 402；Oil-feed control hole 403；Fuel-displaced control
Drilling 404；Mesopore 405；Pressure hole 406；
Injector nozzle matching parts 500；Needle-valve body 501；Needle-valve 502；Sleeve 503；Pressure spring 504；
Piston 505；Second lift adjusting pad 506；Adapter cavity 507；Fuel injection chamber 508；Spiral oil-feed tank 509；
Pressure adjusting pad 510；
Control chamber 600；High pressure chest 601；Transformation chamber 602；
The tight cap of oil nozzle 700；
Fuel inlet fitting assembly 800；Connector 900.
Detailed description of the invention
Domestic exhaust method is increasingly strict, and state more than six emission regulation demands common-rail injector expulsion pressure reaches
To more than 2200bar, and fuel injection rate waveform all can guarantee that first slow rear anxious under each rail pressure, and state at present
Interior common-rail injector expulsion pressure is difficult to reach requirement, current domestic main flow fuel injector motion rod member matter
Amount is big, high frequency response time inertia big, big to seat surface impulsive force so that the service life of fuel injector is shorter.
In order to make the problems referred to above be improved, the invention provides a kind of without static leakage low inertia oil spout
Device assembly and fuel injector, fuel injector includes fuel inlet fitting assembly, connector and component of oil sprayer, oil spout
Device assembly includes oil injector body assembly, magnetic head assembly, switch valve assembly, controls block and injector nozzle matching parts.
Optimize the structure of fuel injector, it is ensured that assembling process is simpler rationally, and the sealing effectiveness of fuel injector is more
Adding excellence, be more beneficial for the accurate control of course of injection, the uniformity making distributive value is more preferable, fuel injector
Take into account oil spout performance when high pressure and low pressure, optimize discharge index；The motion of needle-valve and piston etc. is used to
Measuring relatively low, when needle-valve is turned on and off, the impact to needle-valve body or control block is little, is effectively improved the use longevity
Life, makes course of injection more stable；When switch valve assembly is closed, high pressure chest and the high pressure controlled in chamber
Oil pressure is equal, and dynamic leakage amount is less, thus reduces oil consumption, the discharge capacity of minimizing carbon dioxide.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in inventive embodiments, clearly and completely retouches the technical scheme in the embodiment of the present invention
State, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of protection of the invention.
Therefore, detailed description to the embodiments of the invention provided in the accompanying drawings is not intended to limit below
The scope of claimed invention processed, but it is merely representative of the selected embodiment of the present invention.Based on this
Embodiment in invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
It should also be noted that similar label and letter represent similar terms, therefore, one in following accompanying drawing
A certain Xiang Yi the accompanying drawing of denier is defined, then need not it is carried out further in accompanying drawing subsequently
Definition and explanation.
In describing the invention, it should be noted that term " first ", " second ", " the 3rd "
Describe etc. being only used for distinguishing, and it is not intended that indicate or hint relative importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited,
Term " is arranged ", " installation ", " being connected ", " connection " should be interpreted broadly, for example, it may be fixing even
Connect, it is also possible to be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electricity
Connect；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two elements
Internal connection.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Language concrete meaning in the present invention.
The fuel injector sectional view that Fig. 1 provides for the embodiment of the present invention；Fig. 2 is the control block section view of Fig. 1
Figure；Fig. 3 is the close-up schematic view of Fig. 1；Fig. 4 is the close-up schematic view of Fig. 1.
Fig. 1-Fig. 4 shows that one that the embodiment of the present invention provides is without static leakage low inertia fuel injector group
Part, component of oil sprayer mainly includes with lower part: oil injector body assembly 100, magnetic head assembly 200, open
Close valve assembly 300, control block 400 and injector nozzle matching parts 500.Described in it should be noted that herein
It is relative concept without static leakage, shows that No leakage or leakage are few when standard installation process,
Less amount of leakage may be there is when there is part foozle, abrasion, can not be recognized
For being absolute No leakage.
Structure and the corresponding relation of various piece are as follows:
Oil injector body assembly 100 includes injector body 101 and back leakage connection 102, injector body
101 are internally provided with high-pressure oil passage 103, low pressure oil way 104 and receiving hole 105, back leakage connection 102
Connecting with low pressure oil way 104, receiving hole 105 is arranged at one end and and the low pressure of injector body 101
Oil circuit 104 connects.
High-pressure oil passage 103 is used for receiving hydraulic oil, and receiving hole 105 is used for installing magnetic head assembly 200 etc.,
Final fuel oil is discharged through low pressure oil way 104 and from back leakage connection 102.Receiving hole 105 herein is also
May be considered eccentric orfice, but eccentric orfice described herein is not necessarily relative to oil injector body assembly
The axial line deviation of 100, it is also possible to coincidence etc., is served only for the restriction of a title, can not be as tool
The structure qualification of body.
Magnetic head assembly 200 and switch valve assembly 300 may be contained within receiving hole 105, magnetic head assembly 200
Including magnetic head 201 and magnetic valve spring 202, magnetic head 201 is provided with centre bore, and centre bore can be rank
Ladder hole, magnetic valve spring 202 is arranged in centre bore, switch valve assembly 300 include switch valve 301,
Guide pad the 302, first lift adjusting pad 303 and gap adjusting pad 304, wherein, the first lift adjusts
Pad 303 and gap adjusting pad 304 can be with selective removals, and switch valve 301 sequentially passes through gap
Adjusting pad 304, guide pad 302 and the first lift adjusting pad 303, magnetic valve spring 202 can promote
Switch valve 301 compresses and controls block 400.
Magnetic head assembly 200 be mainly used in control switch valve 301 position, i.e. when magnetic head assembly 200 not
During energising, magnetic head 201 does not produce magnetic force, and magnetic valve spring 202 is in extended configuration and extrudes switch
Valve 301, makes switch valve 301 move towards near the direction controlling block 400 and finally make switch valve 301
Propping up control hole and compress, when magnetic head assembly 200 is energized, magnetic head 201 produces magnetic-adsorption switch
Valve 301, magnetic force is more than the elastic force of magnetic valve spring 202, and switch valve 301 is directed away from controlling block 400
Direction move and make switch valve 301 depart from control block 400.
Switch valve 301 herein can select the structures such as plane formula switch valve 301, in the present embodiment,
The longitudinal cross-section of switch valve 301 is T-shaped.It is internal that switch valve 301 is mainly used in controlling block 400
Structure and low pressure oil way 104 between break-make, and then realize controlling the purpose that whether flows out of fuel oil.
Control block 400 and be arranged at one end of injector body 101, control block 400 and include high-pressure oil duct
401, low pressure oil duct 402, oil-feed control hole 403, fuel-displaced control hole 404, mesopore 405 and pressure hole
406, pressure hole 406 can also be cancelled, and high-pressure oil duct 401 connects with high-pressure oil passage 103, low pressure oil
Road 402 connects with low pressure oil way 104, passes through oil-feed between high-pressure oil duct 401 and mesopore 405 respectively
Control hole 403 connects with pressure hole 406, by fuel-displaced control between low pressure oil duct 402 and mesopore 405
Drilling 404 is connected and can be disconnected by switch valve 301, fuel-displaced control hole 404 and switch valve 301
Correspondence, corresponding mode can be that the bottom of switch valve 301 is corresponding with fuel-displaced control hole 404, switch
Fuel-displaced control hole 404 can be opened or closed by the bottom of valve 301.
Fuel oil in high-pressure oil passage 103 can enter in high-pressure oil duct 401, in high-pressure oil duct 401
Fuel oil can enter in mesopore 405 by oil-feed control hole 403 or pressure hole 406, it is also possible to enters
In injector nozzle matching parts 500, the fuel oil in mesopore 405 can enter low pressure by fuel-displaced control hole 404
In oil duct 402, the fuel oil in low pressure oil duct 402 can enter in low pressure oil way 104.
Injector nozzle matching parts 500 is arranged at the bottom controlling block 400, and injector nozzle matching parts 500 includes needle-valve
Body 501, needle-valve 502, sleeve 503, pressure spring 504, piston 505 and the second lift adjusting pad
506, wherein, the second lift adjusting pad 506 is not necessary, needle-valve body 501 and needle-valve 502
Front end is even joins, and occasionally joins it can be appreciated that coordinate, and needle-valve 502 is slideably positioned in the interior of needle-valve body 501
Portion, the front end of needle-valve 502 can make needle-valve body 501 close or open, one end of piston 505 and pin
The rear end of valve body 501 is even joins, and can directly contact therebetween, it is also possible to mediate contact, the two
Connected mode does not limits, such as fixing connect, contact connects, one-body molded etc..Second lift adjusts
Pad 506 is arranged between needle-valve 502 and piston 505, sleeve 503 is even with piston 505 upper end join and
Mesopore 405 is divided into two parts, and the two ends of pressure spring 504 are respectively held against piston 505 and sleeve
503, " propping up " of occurring in the application can be that the two directly contacts, it is also possible to is by other portion
Part mediate contact, other components is i.e. provided therebetween, sets between needle-valve body 501 and needle-valve 502
It is equipped with the fuel injection chamber 508 connected with high-pressure oil passage 103.
The valve body of injector nozzle matching parts 500 is used for making fuel flow and spraying, and needle-valve 502 is for control valve
Whether internal fuel oil sprays, and mesopore 405 is divided into two parts, the position of sleeve 503 by sleeve 503
Being held essentially constant, piston 505 can slide up and down, and the two ends of pressure spring 504 are respectively held against work
Plug 505 and sleeve 503, piston 505 is by the fuel pressure effect in multiple regions, when piston 505
When the power upwards being subject to is more than downward power, piston 505 rises and makes needle-valve 502 increase, needle-valve
Body 501 is opened and oil spout, when the downward power that piston 505 is subject to is more than power upwards, and piston 505
Declining and make needle-valve 502 decline, needle-valve body 501 closes no longer oil spout.
Needle-valve 502 is provided with spiral oil-feed tank 509, and needle-valve body 501 is provided with adapter cavity 507, transition
Chamber 507 connects with high-pressure oil passage 103, by spiral oil-feed between adapter cavity 507 and fuel injection chamber 508
Groove 509 connects, and the end of needle-valve 502 can use bulb to design, and bulb design may be considered circle
The conical surface or sphere etc., bulb can preferably with other feature contacts, sealing is forged a good relationship, and centering
Property is preferable.Adapter cavity 507 can increase the volume of pressure accumulation part, the atomizer pressure of needle-valve body 501
Losing less, the fluctuation of mouth end pressure is less, and oil spout performance is more stable.Needle-valve 502 offers
Spiral oil-feed tank 509, during oil spout, needle-valve 502 can automatic centering.
It addition, the structure of piston 505 can be a part for multidiameter shape or piston 505 is ladder
Shaft-like, the part being relatively large in diameter of multidiameter is slidably connected with needle-valve body 501, and the diameter of multidiameter is relatively
Little part is slidably connected with sleeve 503, and multidiameter is arranged with pressure adjusting pad 510, pressure spring
One end of 504 props up sleeve 503, and the other end props up pressure adjusting pad 510.
Surround control chamber 600 between sleeve 503 and mesopore 405, control block 400 and needle-valve body 501 it
Between surround high pressure chest 601, surround transformation chamber 602, oil-feed control hole between piston 505 and needle-valve 502
403 connect with controlling chamber 600, and pressure hole 406 connects with high pressure chest 601.Concrete region refer to figure
4。
Control chamber 600, high pressure chest 601 and transformation chamber 602 and be used for controlling the up and down motion of piston 505,
Thus controlling rising or falling of needle-valve 502, the nozzle opening being finally reached needle-valve body 501 opens oil spout
Or close.
Control block 400, between injector nozzle matching parts 500 and injector body 101, be relatively fixed connection, even
The mode connect can be to be connected by the tight cap of oil nozzle 700, and the structure of the tight cap of oil nozzle 700 can be: oil
Tight-lipped cap 700 be internally provided with shoulder hole, the one end in the hole being relatively large in diameter is provided with internal thread, spray
The bottom of oil device body 101 is provided with the external screw thread engaged with internal thread, controls block 400 and is positioned at ladder
In hole, the structure of needle-valve body 501 can be correspondingly arranged as ladder shaft-like, a part for needle-valve body 501
Being positioned at shoulder hole, a part stretches out shoulder hole, and oil nozzle tight cap 700 will control block 400, fuel injection nozzle matching
Part 500 and injector body 101 are fixed, and in the present embodiment, control an end of block 400
Face and the end face laminating of injector body 101, control another one end face and the needle-valve body 501 of block 400
End face laminating.
Realize controlling block 400, injector nozzle matching parts 500 and injector body 101 by oil nozzle tight cap 700
Between fixing, fixed form is simple, easy accessibility.
In order to make fuel oil successfully to flow in component of oil sprayer, need to make corresponding oil circuit align,
Therefore to be correspondingly arranged at least one corresponding with the top controlling block 400 in the bottom of injector body 101
And for wearing or be embedded the first dowel hole of the first alignment pin, the most preferably two, it addition,
Can also be correspondingly arranged at least one corresponding on the top of the bottom and needle-valve body 501 that control block 400
And for wearing or be embedded the second dowel hole of the second alignment pin.First dowel hole and the second location
Pin-and-hole can combine setting, it is also possible to is separately provided, the first alignment pin is directed at the first dowel hole,
Second alignment pin is directed at the second dowel hole, can more accurately realize oil circuit alignment, fuel flow
More smooth and easy.
The structure controlling each oil duct etc. in block 400 can be: high-pressure oil duct 401 is divided into and interconnecting mutually
Logical two sections, respectively first paragraph and second segment, first paragraph and second segment is coaxial shoulder hole, first
Section is relative to second segment closer to high-pressure oil passage 103, and the aperture of first paragraph is more than the aperture of second segment.Low
Force feed road 402 is channel-shaped and is arranged at the top controlling block 400, and low pressure oil duct 402 is for by hydraulic pressure
Oil introduces low pressure oil way 104 from fuel-displaced control hole 404, and the bottom of switch valve 301 can make fuel-displaced control
Hole 404 disconnects with low pressure oil duct 402.Mesopore 405 is coaxial shoulder hole, the top bag of mesopore 405
Include the same conical surface of shaft of at least two difference tapering, ask first conical surface and second conical surface, first conical surface respectively
Relative to second conical surface closer to injector body 101, the tapering of first conical surface is less than the cone of second conical surface
Degree, the top of sleeve 503 and the second conical surface gluing, sealing, now the top of piston 505 is preferably ball
Head, bulb can preferably seal with the first taper-face contact.
Oil-feed control hole 403 includes the oil-feed section that is interconnected and fuel-displaced section, and oil-feed section and fuel-displaced section are all
For being obliquely installed and being coaxial shoulder hole, oil-feed section connects with high-pressure oil passage 103, fuel-displaced section and mesopore
405 connections.Fuel-displaced control hole 404 includes tilting section and the vertical section being interconnected, and tilting section tilts to set
Putting, vertical section is vertically arranged, and tilting section connects with mesopore 405, and the top controlling block 400 is provided with
In cross-shaped oil guide groove, connected by oil guide groove between vertical section with low pressure oil duct 402.
Fuel injection chamber 508 bottom of needle-valve body 501 arranges atomizer, when needle-valve 502 arrives bottom,
Atomizer can being closed of needle-valve 502 so that it is cannot oil spout.
The specific works principle of component of oil sprayer is:
During work, external high pressure oil enters in high-pressure oil passage 103 from the upper end of injector body 101,
Subsequently into the high-pressure oil duct 401 of control block 400, hydraulic oil is divided into three parts, Part I hydraulic oil
Being entered by oil-feed control hole 403 controls in chamber 600, and Part II hydraulic oil passes through pressure hole 406
Entering in high pressure chest 601, Part III hydraulic oil is directly entered in the fuel injection chamber 508 of needle-valve body 501.
When magnetic head assembly 200 is not powered on, switch valve 301 is under the active force of magnetic valve spring 202
Compress downwards and control block 400, and fuel-displaced control hole 404 is sealed by the bottom of switch valve 301,
The oil plant controlled in chamber 600 cannot be introduced in low pressure oil duct 402, is full of height in now controlling chamber 600
It is also filled with hydraulic oil in force feed, and high pressure chest 601 and in transformation chamber 602, is subject to above piston 505
To hydraulic coupling and piston 505 below the hydraulic coupling that is subject to of substantially equal or essentially equal, pressure spring
504 can promote piston 505 to move downward, and piston 505 compresses needle-valve body 501, needle-valve body 501
Atomizer is closed, and is formed and seals structure, and fuel injector is closed, and fuel injector cannot oil spout.
In this stage, owing to controlling the fuel pressure in chamber 600, high pressure chest 601, fuel injection chamber 508
Identical, fuel oil no longer flows in this three parts chamber, therefore can be prevented effectively from static leakage.
When magnetic head assembly 200 is energized, the electromagnetic force of generation, by adhesive switch valve 301, makes switch valve
301 the most fuel-displaced control holes 404, fuel-displaced control hole 404 connects with low pressure oil duct 402,
Control the hydraulic oil in chamber 600 and can enter receiving via fuel-displaced control hole 404 and low pressure oil duct 402
Complete oil return work in hole 105 and low pressure oil way 104 and through back leakage connection 102, control chamber 600
Interior hydraulic oil is released, and pressure reduces, and is full of hydraulic oil, therefore piston 505 in transformation chamber 602
The downward hydraulic coupling that the hydraulic coupling upwards being subject to is subject to more than piston 505, piston 505 is upwards transported
Dynamic, cause the pressure in transformation chamber 602 to reduce, the pressure in fuel injection chamber 508 is more than transformation chamber 602
Interior pressure, the downward hydraulic pressure that the hydraulic coupling upwards that needle-valve 502 is subject to is subject to more than needle-valve 502
Power, therefore, needle-valve 502 moves upward and makes atomizer open, and atomizer can normally work and spray
Penetrate fuel oil.
When, after magnetic head assembly 200 power-off, electromagnetic force hour, switch valve 301 is at magnetic valve spring 202
Effect under take a seat downwards, fuel-displaced control hole 404 is sealed by the bottom of switch valve 301, control chamber 600
Interior fuel oil cannot flow out from fuel-displaced control hole 404, therefore, is full of hydraulic oil in controlling chamber 600,
Piston 505 moves downward and promotes needle-valve 502 to move downward, and atomizer is closed by needle-valve 502, spray
Oil nozzle stops oil spout.
Accordingly, the embodiment of the present invention additionally provides a kind of without static leakage low inertia fuel injector, this spray
Oil device includes the component of oil sprayer in fuel inlet fitting assembly 800, connector 900 and preceding embodiment, enters
Oil connector assembly 800 and connector 900 all can use existing structure, fuel inlet fitting assembly 800 with
High-pressure oil passage 103 connects, and fuel inlet fitting assembly 800 can send oil in high-pressure oil passage 103, patches
Part 900 is arranged at the top of low pressure oil duct 402.
The nouns of locality such as top that the application is previously mentioned, bottom can put position with Figure of description Fig. 1
It is set to reference.
It should be noted that in the case of not conflicting, the feature in embodiment in the present invention is permissible
It is combined with each other.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for
For those skilled in the art, the present invention can have various modifications and variations.All essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention
Protection domain within.
Claims (10)
1. one kind without static leakage low inertia component of oil sprayer, it is characterised in that include that oil injector body is total
One-tenth, magnetic head assembly, switch valve assembly, control block and injector nozzle matching parts；
Described oil injector body assembly includes injector body and back leakage connection, and described injector body is arranged
High-pressure oil passage, low pressure oil way and receiving hole, described back leakage connection is had to connect with described low pressure oil way, institute
State receiving hole be arranged at one end of described injector body and connect with described low pressure oil way；
Described magnetic head assembly and described switch valve assembly may be contained within described receiving hole, and described magnetic head is total
Becoming to include magnetic head and magnetic valve spring, described magnetic head is provided with centre bore, and described magnetic valve spring is arranged
In described centre bore, described switch valve assembly includes that switch valve and guide pad, described switch valve run through
Described guide pad, described magnetic valve spring can promote described switch valve to prop up described control block；
Described control block is arranged at one end of described injector body, described control block include high-pressure oil duct,
Low pressure oil duct, oil-feed control hole, fuel-displaced control hole, mesopore and pressure hole, described high-pressure oil duct and institute
Stating high-pressure oil passage connection, described low pressure oil duct connects with described low pressure oil way, described high-pressure oil duct and institute
State and connected with described pressure hole by described oil-feed control hole respectively between mesopore, described fuel-displaced control hole
Corresponding with described switch valve, between described low pressure oil duct and described mesopore by described fuel-displaced control hole even
Lead to and can be disconnected by described switch valve；
Described injector nozzle matching parts is arranged at one end of described control block, and described injector nozzle matching parts includes needle-valve
Body, needle-valve, sleeve, pressure spring and piston, described needle-valve body is even with the front end of described needle-valve joins,
One end of described piston is even with the rear end of described needle-valve body joins, the other end of described piston and described sleeve
Occasionally joining and described mesopore is divided into two parts, the two ends of described pressure spring are respectively held against described piston
With described sleeve, between described needle-valve body with described needle-valve, it is provided with the spray connected with described high-pressure oil passage
Oil pocket；
Control chamber is surrounded, between described control block and described needle-valve body between described sleeve and described mesopore
Surround high pressure chest, between described piston and described needle-valve, surround transformation chamber, described oil-feed control hole and institute
Stating the connection of control chamber, described pressure hole connects with described high pressure chest.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
Described component of oil sprayer also include the tight cap of oil nozzle, the tight cap sleeve of described oil nozzle be located at described injector nozzle matching parts and
The outside of described control block and threadeding between described injector body.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
The bottom of described injector body is correspondingly arranged at least one corresponding and use with the top of described control block
In wearing or be embedded the first dowel hole of the first alignment pin, and/or the bottom of described control block and described
It is corresponding and for wearing or be embedded the of the second alignment pin that the top of needle-valve body is correspondingly arranged at least one
Two dowel holes.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
Described high-pressure oil duct is divided into two sections be interconnected, respectively first paragraph and second segment, described first paragraph
Be coaxial shoulder hole with described second segment, described first paragraph relative to described second segment closer to described height
Force feed road, the aperture of described first paragraph is more than the aperture of described second segment.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
Described low pressure oil duct is channel-shaped and the top being arranged at described control block, and described low pressure oil duct is for by liquid
Force feed introduces described low pressure oil way from described fuel-displaced control hole, and the bottom of described switch valve can make described
Fuel-displaced control hole disconnects with described low pressure oil duct.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
Described mesopore is coaxial shoulder hole, and the top of described mesopore includes the same axial cone of at least two difference tapering
Face, asks that first conical surface and second conical surface, described first conical surface more lean on relative to described second conical surface respectively
Nearly described injector body, the tapering of described first conical surface is less than the tapering of described second conical surface, described
The top of sleeve and described second conical surface gluing, sealing.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
Described fuel-displaced control hole includes tilting section and the vertical section being interconnected, and described tilting section is obliquely installed,
Described vertical section is vertically arranged, and described tilting section connects with described mesopore, and the top of described control block sets
Be equipped with in cross-shaped oil guide groove, pass through between described vertical section and described low pressure oil duct described in lead
Oil groove connects.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
Described needle-valve is provided with spiral oil-feed tank, and described needle-valve body is provided with adapter cavity, described adapter cavity and institute
State high-pressure oil passage connection, connected by described spiral oil-feed tank between described adapter cavity with described fuel injection chamber.
The component of oil sprayer of low inertia without static leakage the most according to claim 1, it is characterised in that
Described piston includes multidiameter, and the part being relatively large in diameter of described multidiameter is slided even with described needle-valve body
Connecing, the part that the diameter of described multidiameter is less is slidably connected with described sleeve, and described multidiameter is sheathed
Having pressure adjusting pad, one end of described pressure spring to prop up described sleeve, the other end props up described pressure
Adjusting pad.
10. one kind without static leakage low inertia fuel injector, it is characterised in that include fuel inlet fitting assembly,
Component of oil sprayer described in connector and claim 1-9 any one, described fuel inlet fitting assembly and institute
Stating high-pressure oil passage connection, described connector is arranged at the top of described low pressure oil duct.
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| CN201610347876.2A CN105840376B (en) | 2016-05-23 | 2016-05-23 | A kind of no static leakage low inertia component of oil sprayer and fuel injector |
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| CN201610347876.2A CN105840376B (en) | 2016-05-23 | 2016-05-23 | A kind of no static leakage low inertia component of oil sprayer and fuel injector |
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| CN107143452A (en) * | 2017-07-17 | 2017-09-08 | 辽阳新风科技有限公司 | A kind of oil nozzle couple, fuel injector and automobile |
| CN111502880A (en) * | 2020-03-17 | 2020-08-07 | 成都威特电喷有限责任公司 | Electric control high-pressure fuel injection device capable of preventing dynamic leakage |
| CN113107728A (en) * | 2021-05-14 | 2021-07-13 | 无锡威孚高科技集团股份有限公司 | Underneath solenoid valve installation type oil sprayer |
| EP3722590A4 (en) * | 2017-12-07 | 2021-07-28 | Tianjin Shengoumei Engine Technology Consulting Co | Common-rail fuel injector for diesel engine |
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|---|---|
| CN105840376B (en) | 2019-06-18 |
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