CN106762302A - The needle component and armature of fuel injector - Google Patents
The needle component and armature of fuel injector Download PDFInfo
- Publication number
- CN106762302A CN106762302A CN201510800132.7A CN201510800132A CN106762302A CN 106762302 A CN106762302 A CN 106762302A CN 201510800132 A CN201510800132 A CN 201510800132A CN 106762302 A CN106762302 A CN 106762302A
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- CN
- China
- Prior art keywords
- armature
- fuel injector
- baffle ring
- needle
- centre bore
- 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.)
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Abstract
The invention discloses a kind of needle component of fuel injector, including armature, Needle shaft, baffle ring, interstage sleeve；The baffle ring and the interstage sleeve, being fixed on the Needle shaft separately, the baffle ring are located at interstage sleeve lower section；The armature, the baffle ring is set in on the Needle shaft between the interstage sleeve by the way that the centre bore of middle setting is movable up and down；The baffle ring, upper surface is plane；The armature, lower surface inner edge is downwardly convex.The invention also discloses a kind of armature.The present invention, can improve needle valve assembly response speed, lift the flow accuracy of fuel injector.
Description
Technical field
It is more particularly to a kind of the present invention relates to engine technology.
Background technology
With increasingly strict to the energy and environmental requirement, this more accurate spraying technique of in-cylinder direct-jet is widely used
In client's engine.High pressure fuel injector is one of strength member in automotive electronics spraying system, can be accurately supplied to
Fuel oil required for engine, forms good spraying and prepares with air.
Chinese patent 200810044197.3 discloses a kind of needle valve structure of fuel injector, and wherein armature 3 is no longer fixedly connected
(generally welded) on to Needle shaft 5, armature 3 socket-connects with Needle shaft 5 for mobilizable.The needle valve structure is in system
During standby, first baffle ring 4 is welded on Needle shaft 5 on a suitable position, then is socketed upper armature 3, by return
2 sets of spring on interstage sleeve 1 after be inserted in together on Needle shaft 5 again, after adjusting the free travel of armature 3, by interstage sleeve
1 is fixed on Needle shaft 5 (generally weld), and finally valve ball 6 is welded on the other end of Needle shaft 5.This is non-
The needle-valve of fixed armature opens operation principle：As can be seen from Figure 2, the upper end of interstage sleeve 1 in the needle valve structure of on-fixed armature
There is individual main spring 7 in face, and usual this main spring 7 is provided with certain pretightning force for pushing down Needle shaft 5 to ensure valve ball 6
Lower valve ball 6 is acted on without departing from valve seat 8 in fuel pressure.When fuel injector needs work, ECU (electronic controller) gives signal,
Magnetic valve produces magnetic field force under the function of current, and magnetic force is not constant, is gradually increased, armature 3 in the presence of magnetic force,
The gravity of itself and the active force of return spring 2 is overcome to start to be moved toward interstage sleeve l directions, before armature 3 strikes shelves set,
Valve ball 6 is still parked on the sealing surface of valve seat 8, when armature 3 moves to interstage sleeve l lower surfaces, for the unlatching of needle-valve is provided just
Initiating energy, armature 3 and interstage sleeve l fit together, and the active force of main spring 7 is overcome in the presence of electromagnetic force and makes valve ball
6 lift off a seat 8 sealing surfaces, and fuel oil sprays from spray orifice.
When fuel injector needs to be stopped, to halt instruction, failure of current, magnetic valve magnetic force weakens ECU, in main spring 7
Active force under, force Needle shaft 5 and armature 3 to be moved toward the direction of valve seat 8 together, when valve ball 6 and valve seat 8 are contacted,
Needle shaft 5 is lived fuel sealing with valve ball 6 in the presence of main spring 7, while armature 3 and the lower surface of interstage sleeve 1 point
From, relatively independent motion is done, finally it is fitted on the upper surface of baffle ring 4 under the effect of return spring 2.The fuel injector
Needle valve structure, using the needle valve structure of on-fixed armature, in needle-valve opening process, due in armature and needle valve structure
Baffle ring upper surface separate, can respond needle-valve fast；And in needle-valve closing process, because armature is separated with interstage sleeve lower surface,
The impulsive force between valve ball and valve seat can be reduced, and advantageously reduces the abrasion between valve ball and valve seat, valve ball and valve seat are produced
Raw noise can also be reduced, and at the same time be mitigated because the needle-valve quality of on-fixed armature is relative, and needle-valve can be avoided to rebound,
Oil spout is more accurate.
The needle valve structure of the fuel injector, needle component is used without resilience design, armature 3 and the separate design of Needle shaft 5.
In opening process, the setting in motion under less electromagnetic force of armature 3 is opened for needle component and provides initial kinetic energy, favorably
Quickly opened in fuel injector；In closing process absorbing impact energy, needle component resilience is reduced.
But, existing design armature 3, for face contacts, is influenceed with the upper surface of baffle ring 4 by the liquid binder power of entire surface,
Liquid when armature 3 departs from shelves ring 4 hinders larger, influences fuel injector opening speed；In addition, being subject to face wheel at sub- feature contacts
The inconsistent influence of wide degree so that the cohesive force that the armature 3 of each fuel injector is subject to is different, and the separating force of armature 3 is different,
So as to influence injector opening time different, the flow accuracy between fuel injector and fuel injector is eventually affected, particularly
Flow accuracy under small pulsewidth (ti is less than 0.5ms).
The content of the invention
The technical problem to be solved in the present invention is to improve needle valve assembly response speed, lifts the flow accuracy of fuel injector.
In order to solve the above technical problems, the present invention provide fuel injector needle component, including armature, Needle shaft, baffle ring,
Interstage sleeve；The baffle ring and the interstage sleeve, being fixed on the Needle shaft separately, the baffle ring are located under the interstage sleeve
Side；The armature, the baffle ring is set in between the interstage sleeve by the way that the centre bore of middle setting is movable up and down
On Needle shaft；The baffle ring, upper surface is plane；The armature, lower surface inner edge is downwardly convex.
Preferably, the armature, multiple oil leaking holes are evenly arranged with raised inner edge around the centre bore.
Preferably, the armature, its lower surface is provided with recessed grain of the connection centre bore with each oil leaking hole.
Preferably, the armature, 4 oil leaking holes are evenly arranged with raised inner edge around the centre bore；
The connection centre bore and the recessed grain of oil leaking hole that the armature lower surface is set are arc-shaped.
Preferably, the raised inner edge in the armature lower surface and/or baffle ring upper surface inner edge are formed with coating.
Preferably, the needle component of the fuel injector also includes return spring, spring shield；
The return spring, its upper end is arranged and is fixed on the baffle ring lower end, and its lower end is fixed on the spring shield lower end；
The spring shield upper end is fixed on armature lower surface outer rim.
In order to solve the above technical problems, the armature that the present invention is provided, the centre bore of its middle setting, lower surface inner edge is downward
It is raised.
Preferably, being evenly arranged with multiple oil leaking holes around the centre bore at raised inner edge.
Preferably, armature lower surface is provided with recessed grain of the connection centre bore with each oil leaking hole.
Preferably, being evenly arranged with 4 oil leaking holes around the centre bore at raised inner edge；
The connection centre bore and the recessed grain of oil leaking hole that armature lower surface is set are arc-shaped.
The needle component of fuel injector of the invention, armature lower surface inner edge is downwardly convex, so that armature lower surface inner edge is with outer
Intermarginal stepped, such armature forms certain difference in height from inside to outside with the collision area of baffle ring, and collision area is by face
Contact is optimized to linear contact lay, so as to reduce the cohesive force between moving armature and lower baffle ring, improves needle valve assembly response speed,
Lift the flow accuracy of fuel injector.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, is below made to the accompanying drawing used required for the present invention simple Jie
Continue, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill
For personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of floor map of existing needle valve structure；
Fig. 2 is a kind of working state schematic representation of existing needle valve structure；
Fig. 3 is the example structure figure of needle component one of fuel injector of the invention；
Fig. 4 is the embodiment armature of needle component one of fuel injector of the invention with baffle ring contact surface partial enlarged drawing；
Fig. 5 is the embodiment armature upward view of needle component one of fuel injector of the invention.
Specific embodiment
Below in conjunction with accompanying drawing, clear, complete description is carried out to the technical scheme in the present invention, it is clear that described
Embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
All other embodiment that domain those of ordinary skill is obtained on the premise of creative work is not made, belongs to this hair
The scope of bright protection.
Embodiment one
The needle component of fuel injector, as shown in Figure 3, Figure 4, including armature 3, Needle shaft 5, baffle ring 4, interstage sleeve 1；
The baffle ring 4 and the interstage sleeve 1, being fixed on the Needle shaft 5 separately, the baffle ring 4 is located at described
The lower section of interstage sleeve 1；
The armature 3, by the centre bore of the middle setting baffle ring 4 that is set in movable up and down with the interstage sleeve 1
Between Needle shaft 5 on；
The baffle ring 4, upper surface is plane；
The armature 3, lower surface inner edge is downwardly convex.
The needle component of the fuel injector of embodiment one, the lower surface inner edge of the armature 3 is downwardly convex, so that under the armature 3
With outer intermarginal stepped, so described armature 3 is formed necessarily from inside to outside with the collision area of the baffle ring 4 for end face inner edge
Difference in height, collision area is optimized to linear contact lay by face contact, so as to reduce the cohesive force between moving armature 3 and lower baffle ring 4,
Needle valve assembly response speed is improved, the flow accuracy of fuel injector is lifted.
Embodiment two
Based on the needle component of the fuel injector of embodiment one, the armature 3 as shown in figure 5, around described at raised inner edge
Centre bore is evenly arranged with multiple (such as 4) oil leaking holes.
The needle component of the fuel injector of embodiment two, armature 3 is evenly arranged with multiple oil leaks at raised inner edge around centre bore
Hole, is conducive to the liquid between contact surface to flow out, and on the premise of useful flux area is not influenceed, can reduce hydraulic pressure resistance
Power, improves flow uniformity, especially low discharge uniformity, is conducive to engine combustion and discharge.
Preferably, the armature 3, its lower surface is provided with recessed grain of the connection centre bore with each oil leaking hole.In armature
3 lower surface collision areas carry out trench design, can not only reduce grade ring 4 and be accumulated with the relative contact of the lower surface of armature 3, and
And be conducive to the liquid between contact surface to flow out.
Preferably, the recessed grain for connecting centre bore and oil leaking hole that the lower surface of the armature 3 is set, is arc-shaped.Arc-shaped
Recessed grain, processing of being more convenient for.
Embodiment three
Based on the needle component of the fuel injector of embodiment one, the lower surface of the armature 3 raised inner edge and/or the upper end of the baffle ring 4
Face inner edge is formed with coating (such as chromium plating).
The needle component of the fuel injector of embodiment three, individually to contact surface surface quality optimization design, only to zonule contact surface
It is surface-treated, it is only necessary to which relatively low cost just can further so as to reduce the bonding between moving armature 3 and lower baffle ring 4
Power, improves needle valve assembly response speed, lifts the flow accuracy of fuel injector.
Example IV
Based on embodiment one, the needle component of fuel injector also includes return spring 2, spring shield 10；
The return spring 2, its upper end is arranged and is fixed on the lower end of the baffle ring 4, and its lower end is fixed on the spring shield 10
Lower end；
The upper end of the spring shield 10 is fixed on the lower surface outer rim of the armature 3.
The needle component of example IV fuel injector, armature 3 drives spring shield 10 to overcome back together in the presence of electromagnetic force
The active force of position spring 2 is moved toward the direction of baffle ring 4.When magnetic valve magnetic force weakens, under the active force of return spring 2,
Spring shield 10 is forced to be moved toward the direction of interstage sleeve 1 together with moving armature 3.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in spirit of the invention
Within principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. the needle component of a kind of fuel injector, including armature, Needle shaft, baffle ring, interstage sleeve；The baffle ring and the interstage sleeve,
Being fixed on the Needle shaft separately, the baffle ring is located at interstage sleeve lower section；The armature, by middle setting
Centre bore movable up and down be set in the baffle ring with the Needle shaft between the interstage sleeve；Characterized in that,
The baffle ring, upper surface is plane；
The armature, lower surface inner edge is downwardly convex.
2. the needle component of fuel injector according to claim 1, it is characterised in that
The armature, multiple oil leaking holes are evenly arranged with raised inner edge around the centre bore.
3. the needle component of fuel injector according to claim 2, it is characterised in that
The armature, its lower surface is provided with recessed grain of the connection centre bore with each oil leaking hole.
4. the needle component of fuel injector according to claim 3, it is characterised in that
The armature, 4 oil leaking holes are evenly arranged with raised inner edge around the centre bore；
The connection centre bore and the recessed grain of oil leaking hole that the armature lower surface is set are arc-shaped.
5. the needle component of fuel injector according to claim 1, it is characterised in that
The raised inner edge in the armature lower surface and/or baffle ring upper surface inner edge are formed with coating.
6. the needle component of fuel injector according to claim 1, it is characterised in that
The needle component of the fuel injector also includes return spring, spring shield；
The return spring, its upper end is arranged and is fixed on the baffle ring lower end, and its lower end is fixed on the spring shield lower end；
The spring shield upper end is fixed on armature lower surface outer rim.
7. a kind of armature, it is characterised in that the centre bore of middle setting, lower surface inner edge is downwardly convex.
8. armature according to claim 7, it is characterised in that
At raised inner edge multiple oil leaking holes are evenly arranged with around the centre bore.
9. armature according to claim 8, it is characterised in that
Armature lower surface is provided with recessed grain of the connection centre bore with each oil leaking hole.
10. armature according to claim 9, it is characterised in that
At raised inner edge 4 oil leaking holes are evenly arranged with around the centre bore；
The connection centre bore and the recessed grain of oil leaking hole that armature lower surface is set are arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510800132.7A CN106762302A (en) | 2015-11-19 | 2015-11-19 | The needle component and armature of fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510800132.7A CN106762302A (en) | 2015-11-19 | 2015-11-19 | The needle component and armature of fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106762302A true CN106762302A (en) | 2017-05-31 |
Family
ID=58916223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510800132.7A Pending CN106762302A (en) | 2015-11-19 | 2015-11-19 | The needle component and armature of fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106762302A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119885A (en) * | 1993-03-26 | 1996-04-03 | 美国西门子汽车公司 | Impact dampened armature and needle valve assembly |
| CN101512140A (en) * | 2006-09-07 | 2009-08-19 | 罗伯特·博世有限公司 | Injector for injecting fuel |
| CN201351562Y (en) * | 2008-12-25 | 2009-11-25 | 联合汽车电子有限公司 | Needle valve structure of fuel injector |
| CN101981303A (en) * | 2008-04-02 | 2011-02-23 | 罗伯特·博世有限公司 | Fuel injector with solenoid valve |
| CN102822499A (en) * | 2010-04-01 | 2012-12-12 | 日立汽车***株式会社 | Electromagnetic fuel injection valve |
| CN103291513A (en) * | 2012-02-24 | 2013-09-11 | 纳博特斯克有限公司 | Solenoid valve |
| CN103423049A (en) * | 2013-09-06 | 2013-12-04 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector assembly |
| CN103534476A (en) * | 2011-05-13 | 2014-01-22 | 安德鲁·E·迈耶 | Fuel injector |
| CN104110340A (en) * | 2013-04-17 | 2014-10-22 | 马涅蒂-马瑞利公司 | Electromagnetic fuel injector with braking device |
| CN104136761A (en) * | 2011-12-09 | 2014-11-05 | 现代凯菲克株式会社 | Direct injection fuel injector |
| CN104912706A (en) * | 2014-03-14 | 2015-09-16 | 大陆汽车有限公司 | Fuel injector |
| CN205277662U (en) * | 2015-11-19 | 2016-06-01 | 联合汽车电子有限公司 | Needle subassembly and armature of sprayer |
-
2015
- 2015-11-19 CN CN201510800132.7A patent/CN106762302A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69406780T2 (en) * | 1993-03-26 | 1998-04-09 | Siemens Automotive Corp Lp | SHOCK ABSORBED ANCHOR AND NEEDLE VALVE ARRANGEMENT |
| CN1119885A (en) * | 1993-03-26 | 1996-04-03 | 美国西门子汽车公司 | Impact dampened armature and needle valve assembly |
| CN101512140A (en) * | 2006-09-07 | 2009-08-19 | 罗伯特·博世有限公司 | Injector for injecting fuel |
| CN101981303A (en) * | 2008-04-02 | 2011-02-23 | 罗伯特·博世有限公司 | Fuel injector with solenoid valve |
| CN201351562Y (en) * | 2008-12-25 | 2009-11-25 | 联合汽车电子有限公司 | Needle valve structure of fuel injector |
| CN102822499A (en) * | 2010-04-01 | 2012-12-12 | 日立汽车***株式会社 | Electromagnetic fuel injection valve |
| CN103534476A (en) * | 2011-05-13 | 2014-01-22 | 安德鲁·E·迈耶 | Fuel injector |
| CN104136761A (en) * | 2011-12-09 | 2014-11-05 | 现代凯菲克株式会社 | Direct injection fuel injector |
| CN103291513A (en) * | 2012-02-24 | 2013-09-11 | 纳博特斯克有限公司 | Solenoid valve |
| CN104110340A (en) * | 2013-04-17 | 2014-10-22 | 马涅蒂-马瑞利公司 | Electromagnetic fuel injector with braking device |
| CN103423049A (en) * | 2013-09-06 | 2013-12-04 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector assembly |
| CN104912706A (en) * | 2014-03-14 | 2015-09-16 | 大陆汽车有限公司 | Fuel injector |
| CN205277662U (en) * | 2015-11-19 | 2016-06-01 | 联合汽车电子有限公司 | Needle subassembly and armature of sprayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
|
| RJ01 | Rejection of invention patent application after publication |