CN107829837A - A kind of fuel jet electronic mechanism of high pressure common rail injector - Google Patents
A kind of fuel jet electronic mechanism of high pressure common rail injector Download PDFInfo
- Publication number
- CN107829837A CN107829837A CN201711035817.2A CN201711035817A CN107829837A CN 107829837 A CN107829837 A CN 107829837A CN 201711035817 A CN201711035817 A CN 201711035817A CN 107829837 A CN107829837 A CN 107829837A
- Authority
- CN
- China
- Prior art keywords
- armature card
- high pressure
- common rail
- injector
- fuel
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3827—Common rail control systems for diesel engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
Abstract
The invention discloses the fuel jet electronic mechanism of high pressure common rail injector, including magnetic valve, armature card, magnetic valve spring, electromagnetic brake is provided with the lower case of magnetic valve, lower case passes through sleeve pipe connection with fuel injector top, the lower end of magnetic valve spring coordinates with the upper end of fuel injector valve element, the spring mounting groove of upper end and magnetic valve coordinates, armature card is in the groove on fuel injector top, armature card is with valve element in valve element axial direction intermediate tie, the upper surface of armature card coordinates with electromagnetic brake lower surface, the compression spring upper end of lower surface and fuel injector top coordinates；Armature card includes the bottom adapter sleeve being connected, top connecting plate with axial bore, and top connecting plate is provided with multiple uniform fan grooves, and armature card is manufactured using the powder of MIM 4605 and by metal injection moulding.Fuel Injection Control reliability of the present invention is high, improves processing efficiency, stock utilization, cost-effective, improves electromagnetic performance.
Description
Technical field
The present invention relates to a kind of diesel vehicle fuel Injection Control technical field, more particularly to a kind of high pressure common rail injector
Fuel jet electronic mechanism.
Technical background
Co-rail ejector of the prior art controls the injection of fuel oil using fuel Injection Control mechanism, if any use
Solenoid valve control spray threshold switch, using electromagnetic brake open electricity valve, electromagnetic brake it is electric in the case of formed magnetic circuit,
Adhesive armature moves, so as to control injection valve to open, close.
With the upgrading of Abgasgesetz, higher requirement is proposed to common-rail injector performance, attractive force of solenoid valve characteristic is to determine
Determine one of major parameter of fuel injector highest work rail pressure, the response characteristic of magnetic valve is to influence the multiple distributive ability of fuel injector
Key index.And the structure of armature card in magnetic valve, material property, machining accuracy can strong influence magnetic valve response speed,
The size of electromagnetic force.The armature harden structure of prior art uses the overall structure of axle sleeve and conical plate composition, is set in taper plate face
Upper uniform fan-shaped notch.Now processed in the art with conventional bar, for tapered panel and three fan-shaped notch manufacturing procedures
Various, efficiency is low, it is often more important that and notch symmetry is not easy to ensure, electromagnetic consumable is more, and magnetic circuit disturbance is big, influences electromagnetic force,
Electromagnetic response speed is slow.
The content of the invention
There is above-mentioned deficiency in the present invention, there is provided a kind of fuel oil injection of high pressure common rail injector aiming at prior art
Electric control mechanism；The present invention is simple in construction, and fuel Injection Control reliability is high, fully meets common-rail injector performance requirement, adopts
With iron powder nickel alloy material, by MIM injection molding techniques, shot processing and forming armature card, simplify process, improve and add
Work efficiency rate；Stock utilization is improved, has saved cost；Three notch symmetry easily ensure, improve electromagnetic performance.
The present invention solve technical problem technical scheme be：
A kind of fuel jet electronic mechanism of high pressure common rail injector, including magnetic valve, armature card, magnetic valve bullet
Spring, electromagnetic brake is provided with the lower case of magnetic valve, and lower case passes through sleeve pipe connection, magnetic valve bullet with fuel injector top
The lower end of the spring and upper end cooperation of fuel injector valve element, the spring mounting groove of upper end and magnetic valve coordinate, and armature card is located at fuel injector
In the groove on top, armature card is with valve element in valve element axial direction intermediate tie, upper surface and the electromagnetic brake lower surface of armature card
The compression spring upper end of cooperation, lower surface and fuel injector top coordinates；The armature card includes being connected with axial bore
Bottom adapter sleeve, top connecting plate, top connecting plate are provided with multiple uniform fan grooves, and the armature card uses MIM-4605
Powder is simultaneously manufactured by metal injection moulding.
The fan groove is provided with three.
The angle of the fan groove is 90 °.
The bottom of the fan groove is provided with axially long open slot.
Radius R30mm knuckle is provided with the upper surface position of open slot.
The connecting plate bottom is provided with the circular conical surface that inclination angle is 9 °.
The armature card is made especially by following steps：
1) feeding makes:Particle diameter 4um~20um metallic particles and bonding agent are mixed to get graininess by a certain percentage
Feeding；
2) it is injection moulded:Graininess feeding is injected by injector to mold cavity, curing and demolding forms green embryo；
3 degreasings:Quenched by solvent and take mode or be slowly heated the mode for making olefin material dissolve out from green embryo, will be green
Redundant adhesive removes to form brown embryo inside embryo；
4) densified sintering product:In a vacuum furnace or by nitrogen hydrogen protective gas, brown embryo is subjected to high temperature sintering processing, obtained high
Density products.
The bonding agent of the step 1) is paraffin group, and the mass percent of paraffin group is 5%~8%.
The step 2) is molded simultaneously in one set of die provided with multiple mold cavities.
The high temperature sintering treatment temperature of the step 4) is controlled at 1200 DEG C~1300 DEG C.
Beneficial effects of the present invention：
The present invention is simple in construction, and fuel Injection Control reliability is high, fully meets common-rail injector performance requirement, armature card
Using iron powder nickel alloy material, by MIM injection molding techniques, shot processing and forming, good product consistency, quality can
By being easily guaranteed that, simplify process, be easy to processing and fabricating, improve processing efficiency, can strengthen and improve stock utilization, produce
Cost is low, and notch symmetry easily ensures, product quality stability is high, improves electromagnetic performance, and control accuracy is high, and production cost is low,
Meet the requirement produced in enormous quantities..
The present invention on the top connecting plate of armature card by being provided with multiple uniform fan grooves, the angle of the fan groove
For 90 °, it cut-out can be vortexed as far as possible, reduce electromagnetic consumable.
The bottom of fan groove is provided with axially long open slot, and radius R30mm transition is provided with the upper surface position of open slot
Fillet, liquid flowing resistance can be reduced, reduce pressure oscillation.
, can be in the case of proof strength as far as possible 4. be 9 ° of circular conical surface by being provided with inclination angle in the connecting plate bottom
Quality is reduced, improves its electromagnetic response speed.
5. armature plate material of the present invention uses MIM-4605 powder, permeability is high, electromagnetic performance is good, is noted using metal
Forming method manufacture is penetrated, multiple forming cavities can be provided with one set of die as needed carries out processing and forming simultaneously, not only drops
Production efficiency is also greatly improved in low cost, while uses mould injection moulding method, the material economy compared with bar machine-shaping
50%, stock utilization is improved, reduces production cost, stable and reliable product quality.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is armature card structure chart；
Fig. 3 is Fig. 2 sectional view.
Embodiment
For a better understanding of the present invention, embodiments of the present invention are explained in detail below in conjunction with the accompanying drawings.
With reference to Fig. 1, Fig. 2, Fig. 3, a kind of fuel jet electronic mechanism of common-rail injector, including magnetic valve 9, armature
Plate 10, magnetic valve spring 3, are provided with electromagnetic brake 92 in the lower case 91 of magnetic valve 9, lower case 91 with fuel injector 1
Portion is connected by sleeve pipe 93, the lower end of magnetic valve spring 3 and the spring of the upper end cooperation of fuel injector valve element 5, upper end and magnetic valve 9
Mounting groove coordinates, armature card 10 in the groove on the top of fuel injector 1, armature card 10 and valve element 5 in valve element axial direction intermediate tie,
The upper end of compression spring 14 of the upper surface of armature card 10 and the cooperation of the lower surface of electromagnetic brake 92, lower surface and the top of fuel injector 1
Coordinate.
The armature card 10 includes the bottom adapter sleeve 101 being connected, top connecting plate 102 with axial bore, top
Connecting plate 102 is provided with multiple uniform fan grooves 103.Three fan grooves 103 are provided with the embodiment of the present invention.
The angle of the fan groove is 90 °.It is arranged so as to that vortex can be effectively cut off, reduces electromagnetic consumable.
The bottom of fan groove 103 is provided with axially long open slot 104.
Radius R30mm knuckle 105 is provided with the upper surface position of open slot 104.Knuckle 105 can be reduced
Liquid flowing resistance, reduce pressure oscillation.
The connecting plate bottom is provided with the circular conical surface 106 that inclination angle is 9 °.Be in order in the case of proof strength as far as possible
Quality is reduced, improves its electromagnetic response speed.
The armature card 10 is using MIM-4605 (ASIM B883), corresponding national standard draft (ISO DRAFT/Borrador
EPMA-2000 composition is MIM-Fe2NiO in), 6C iron-nickel alloy, using powder injection molding process, by stock → mixing →
Kneading → crushing → makes material → injection moulding → degreasing → densified sintering product technological process and makes shaping.
The armature card is made using MIM-4605 powder and by following steps：
1) feeding makes:Pass through stock → mixing → kneading → and crush → make material by particle diameter 4um~20um metallic particles
It is mixed to get graininess feeding by a certain percentage with bonding agent；
2) it is injection moulded:Graininess feeding is injected by injector to mold cavity, curing and demolding forms green embryo；
3 degreasings:Quenched by solvent and take mode or be slowly heated the mode for making olefin material dissolve out from green embryo, will be green
Redundant adhesive removes to form brown embryo inside embryo；
4) densified sintering product:In a vacuum furnace or by nitrogen hydrogen protective gas, brown embryo is subjected to high temperature sintering processing, obtained high
Density products.
The bonding agent of the step 1) is paraffin group, and the mass percent of paraffin group is 5%~8%.
The step 2) is molded simultaneously in one set of die provided with multiple mold cavities.
The high temperature sintering treatment temperature of the step 4) is controlled at 1200 DEG C~1300 DEG C.
The MIM processing methods of the present invention use a kind of net forming technique of metallic element of field of powder metallurgy, can manufacture
Into going out complex geometric shapes, be easy to the product produced in enormous quantities, and possess and hot investment casting, the close physics of forging, chemistry
And the features such as mechanical performance.By MIM techniques, can add-on type go out the workpiece in minimum 0.1mm apertures, and the work of most thin 1mm thickness
Part.
The present invention makes metal dust that metal powder granulates are wrapped up, prevented or destroyed with adhesive by using bonding agent
Sintering, so as to be manufactured into a raw material as uniform as possible, additionally it is possible to improve the mobility of powder, surpass lubrication and soak and make
With, and as the trunk after embryo material degreasing, the intensity and shape-retaining ability of embryo material can be lifted, and porous medium passage is formed, profit
In the quick progress of thermal decomposition.For cement ratio preferably 5%~8%, respective metal particle accounts for 92%~95% during mixing.
The cement of paraffin series can be used.Olefin material is set to be come out by being melted in green compact by relatively slow heating,
Also referred to as solvent extraction, most of cement being can remove, remaining part is used to support shape of product, and the process is referred to as degreasing,
It is referred to as brown base so as to form porous type part.In addition polymer system, water-soluble polymer system and catalysis degreasing also can be used in cement
Polymer system.
Brown base after degreasing enters sintering furnace, first removes unnecessary cement, is subsequently heated to 1200 DEG C~1300 DEG C,
Metallic particles is set to receive the metal parts to form densification, relative density reaches 95%~98% after sintering.
Armature plate material of the present invention is MIM-4605 powder, and Main Ingredients and Appearance is iron-nickel alloy, and Ni elements, which add, can improve magnetic
Conductance, improve electromagnetic performance；Technique can significantly be simplified using metal injection moulding manufacture.
The knuckle breach of radius R30mm in armature harden structure of the present invention, pass through metal injection molded (MIM) method
Manufacture, good product consistency, reliable in quality are easily guaranteed that, can strengthen electromagnetic performance.Made using metal injection molded (MIM)
Make, significantly reduce cost, simplify technique；One set of die as needed is provided with multiple forming cavities and carries out processing and forming simultaneously,
Such as the chamber of a mould four or the cavity configuration of a mould eight can be processed into, reduce cost simultaneously, processing efficiency is greatly improved.
Mould injection moulding method is used in invention, compared with bar machine-shaping, material economy 50%, improves material profit
It is cost-effective with rate.
The present invention the course of work be：
Diesel oil enters the first filter element filtering through prior art before fuel injector 1, then the high pressure Jing Guo prior art respectively
Oil duct is in needle-valve body balancing gate pit and 2 in control sleeve control chamber；Because pressure caused by diesel oil is remote in control sleeve control chamber
Much smaller than the pressure of magnetic valve spring 3, ball sealer 4 is pressed in control under the pressure of magnetic valve spring 3, by valve element 5 and ball seat 6
On the sealing cone 7 of sleeve, control sleeve control chamber 2 forms the high pressure chest of a sealing, so that in control sleeve control chamber
Caused pressure is more than caused pressure in unshowned needle-valve body balancing gate pit, and (prior art, the present invention are attached not shown for needle-valve
Go out) just it is pressed under the pressure effect of control piston 8 on the sealing cone that needle-valve body is not shown.
When magnetic valve 9 is powered, armature 10 compresses magnetic valve spring 3 upwards in the presence of magnetic valve magnetic flux power, now
Ball sealer 4 is lifted off sealing cone 7 by caused pressure in control sleeve control chamber 2, and diesel oil passes through control in control sleeve control chamber 2
Sleeve throttle orifice 11 processed flows into oil injector body low pressure chamber 12, then (prior art, accompanying drawing of the present invention is not by oil injector body spill port
Show) return to fuel tank.Because the diameter of control sleeve hole 13 is less than control sleeve bore dia 11, pressure in control sleeve control chamber 2
It is rapid to reduce, when diesel oil acts on the control pressure of piston 8 and pressure spring (prior art, the present invention in control sleeve control chamber 2
Accompanying drawing is not shown) pretightning force sum be less than when being not shown that diesel oil acts on the power on needle-valve in needle-valve body balancing gate pit, needle-valve is close
Seal the conical surface (prior art, accompanying drawing of the present invention are not shown) and needle-valve body sealing cone (prior art, accompanying drawing of the present invention are not shown)
Separation, spray orifice are opened, and high-pressure diesel is with vaporific penetrating burning chamber of diesel engine.
After magnetic valve 9 powers off again, magnetic flux power disappears, and magnetic valve spring 3 is again by valve element 5 and ball seat 6 sealing
Ball 4 is pressed onto on control sleeve sealing cone 7, and control sleeve control chamber 2 forms an annular seal space again, when diesel oil is in control sleeve
The pressure of control piston 8 is applied in control chamber 2 and pressure spring pressure sum is not shown and is more than needle-valve body (existing skill again
Art, accompanying drawing of the present invention are not shown) when acting on the pressure on needle-valve, needle-valve sealing cone falls on the close of needle-valve body again for balancing gate pit
Seal on the conical surface, spray orifice is closed, end of injection.
Although the present invention has shown that and described the embodiment of the present invention, for one of ordinary skill in the art, can with
Example can be applied in the case where not departing from the principle of the present invention and spirit to these by, which understanding, carries out a variety of change, modification, replacement and modification, all
Belong to stating within claims for this present invention.
Claims (9)
1. a kind of fuel jet electronic mechanism of high pressure common rail injector, it is characterized in that, including magnetic valve, armature card, electricity
Magnet valve spring, electromagnetic brake is provided with the lower case of magnetic valve, and lower case passes through sleeve pipe connection, electricity with fuel injector top
The lower end of the magnet valve spring and upper end cooperation of fuel injector valve element, the spring mounting groove of upper end and magnetic valve coordinate, and armature card is located at
In the groove on fuel injector top, armature card is with valve element in valve element axial direction intermediate tie, the upper surface of armature card and electromagnetic brake
The compression spring upper end of lower surface cooperation, lower surface and fuel injector top coordinates；The armature card includes the phase with axial bore
Bottom adapter sleeve, the top connecting plate of connection, top connecting plate are provided with multiple uniform fan grooves, and the armature card uses
MIM-4605 powder is simultaneously manufactured by metal injection moulding.
2. a kind of fuel jet electronic mechanism of high pressure common rail injector as claimed in claim 1, it is characterized in that, it is described
Fan groove is provided with three.
3. a kind of fuel jet electronic mechanism of high pressure common rail injector as claimed in claim 2, it is characterized in that, it is described
The angle of fan groove is 90 °.
4. a kind of fuel jet electronic mechanism of high pressure common rail injector as claimed in claim 3, it is characterized in that, it is described
The bottom of fan groove is provided with axially long open slot.
5. a kind of fuel jet electronic mechanism of high pressure common rail injector as claimed in claim 4, it is characterized in that, opening
The upper surface position of mouth groove is provided with radius R30mm knuckle, and the connecting plate bottom is provided with the circular conical surface that inclination angle is 9 °.
6. the fuel jet electronic mechanism of any high pressure common rail injector as described in claim 1-5, it is characterized in that,
The armature card is made using MIM-4605 powder and by following steps：
1) feeding makes:Particle diameter 4um~20um metallic particles and bonding agent are mixed to get graininess feeding by a certain percentage；
2) it is injection moulded:Graininess feeding is injected by injector to mold cavity, curing and demolding forms green embryo；
3 degreasings:Quenched by solvent and take mode or be slowly heated the mode for making olefin material dissolve out from green embryo, by green embryo
Portion's redundant adhesive removes to form brown embryo；
4) densified sintering product:In a vacuum furnace or by nitrogen hydrogen protective gas, brown embryo is subjected to high temperature sintering processing, obtains high density
Product.
7. a kind of fuel jet electronic mechanism of high pressure common rail injector as claimed in claim 6, it is characterized in that, it is described
The bonding agent of step 1) is paraffin group, and the mass percent of paraffin group is 5%~8%.
8. a kind of fuel jet electronic mechanism of high pressure common rail injector as claimed in claim 6, it is characterized in that, it is described
Step 2) is molded simultaneously in one set of die provided with multiple mold cavities.
9. a kind of fuel jet electronic mechanism of high pressure common rail injector as claimed in claim 6, it is characterized in that, it is described
The high temperature sintering treatment temperature of step 4) is controlled at 1200 DEG C~1300 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035817.2A CN107829837A (en) | 2017-10-30 | 2017-10-30 | A kind of fuel jet electronic mechanism of high pressure common rail injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035817.2A CN107829837A (en) | 2017-10-30 | 2017-10-30 | A kind of fuel jet electronic mechanism of high pressure common rail injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107829837A true CN107829837A (en) | 2018-03-23 |
Family
ID=61649990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711035817.2A Pending CN107829837A (en) | 2017-10-30 | 2017-10-30 | A kind of fuel jet electronic mechanism of high pressure common rail injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107829837A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006020689A1 (en) * | 2006-05-04 | 2007-11-08 | Robert Bosch Gmbh | Solenoid valve with integral anchor connection |
| CN102667131A (en) * | 2009-12-22 | 2012-09-12 | 罗伯特·博世有限公司 | Pole core for magnetic valves produced by means of multi-material mim |
| CN103233838A (en) * | 2013-04-23 | 2013-08-07 | 上海理工大学 | Electronic control gasoline injector and manufacturing method thereof |
| CN205445855U (en) * | 2016-04-07 | 2016-08-10 | 宁波舜田良源油嘴油泵有限公司 | High pressure common rail electric fuel injector with novel armature assembly |
| CN106180724A (en) * | 2016-07-08 | 2016-12-07 | 株洲华宏机械制造有限公司 | A kind of fuel injection equipment (FIE) fuel injector valve seat and manufacture method thereof |
-
2017
- 2017-10-30 CN CN201711035817.2A patent/CN107829837A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006020689A1 (en) * | 2006-05-04 | 2007-11-08 | Robert Bosch Gmbh | Solenoid valve with integral anchor connection |
| CN102667131A (en) * | 2009-12-22 | 2012-09-12 | 罗伯特·博世有限公司 | Pole core for magnetic valves produced by means of multi-material mim |
| CN103233838A (en) * | 2013-04-23 | 2013-08-07 | 上海理工大学 | Electronic control gasoline injector and manufacturing method thereof |
| CN205445855U (en) * | 2016-04-07 | 2016-08-10 | 宁波舜田良源油嘴油泵有限公司 | High pressure common rail electric fuel injector with novel armature assembly |
| CN106180724A (en) * | 2016-07-08 | 2016-12-07 | 株洲华宏机械制造有限公司 | A kind of fuel injection equipment (FIE) fuel injector valve seat and manufacture method thereof |
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| PB01 | Publication | ||
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Application publication date: 20180323 |