CN109869252A - A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine - Google Patents
A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine Download PDFInfo
- Publication number
- CN109869252A CN109869252A CN201910197770.2A CN201910197770A CN109869252A CN 109869252 A CN109869252 A CN 109869252A CN 201910197770 A CN201910197770 A CN 201910197770A CN 109869252 A CN109869252 A CN 109869252A
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- China
- Prior art keywords
- fuel injector
- oil
- oil leab
- valve
- needle
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Abstract
The invention discloses a kind of high frequency response fuel injectors of Design of High Pressure Common Rail Diesel Engine, and directly the bottom of cylindrical control piston is connected with needle-valve, have lubrication ring set in the middle part design of control piston, for reducing the friction between control piston and oil injector body；Armature is placed in control piston upper end, provides sufficient space for the arrangement of high-pressure oil duct.The present invention can shorten the duration of needle-valve opening and closing, reduce the conduction time of electromagnetic coil, improve the response speed of fuel injector, and simplify fuel injector structure, manufacture easy to process and assembling and setting reduce fluid power delay phenomenon, are conducive to the realization of multi-injection.
Description
Technical field
The invention belongs to internal combustion engine fuel injection system fields, relate in particular to a kind of high frequency of Design of High Pressure Common Rail Diesel Engine
Respond fuel injector.
Background technique
Currently, as emission regulation is more and more tighter, it is higher and higher for the emission request of diesel engine, in order to meet national row
The requirement for putting regulation needs to improve the response speed and stability of fuel injection system.
If control piston is connected directly, cavity segment of removing controls can simplify fuel injector by solenoid valve overhead with needle-valve
Structure, but increase the friction between control piston and oil injector body, the stability of needle valve movement can also reduce.Therefore, it needs
A kind of fuel injector for high-pressure common rail is designed, under the premise of simplifying structure, is reduced between control piston and oil injector body
Frictional force improves the stability of needle valve movement, meets higher injection response speed and stability.
Summary of the invention
Aiming at the shortcomings in the prior art, in order to realize the promotion of oil spout performance, the present invention provides a kind of high-pressure common rails
The high frequency response fuel injector of diesel engine.
To realize the above-mentioned technical purpose, the present invention adopts the following technical scheme:
A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine, including control piston, the control top land with answer
Position spring compression connection, the top of reset spring and oil injector body are compressed and are connected, and control piston upper end is fixedly connected with armature,
Middle section and lubrication ring set carry out slidably nested encryptions, and lubrication ring set bottom and gasket seal, which compress, to be connected, and control piston
It is fixedly connected at the top of bottom and needle-valve, the oil leab intake channel and oil leab of lubrication ring set and setting in the injector body
Exit passageway connection, oil leab intake channel tilt upward, and oil leab exit passageway is horizontally disposed；The armature setting exists
Solenoid valve enclosure interior, armature top is compressed with armature reset spring to be connected, and is compressed at the top of armature reset spring with oil injector body
Connection, solenoid valve enclosure interior top are additionally provided with electromagnetic coil, and solenoid valve housing bottom is fixedly connected with lubrication ring set.
In above scheme, the needle-valve head is that semicircle is spherical, and the spray orifice on oil injector body is processed into the circular arc of recess
Shape and needle-valve head coincide.
In above scheme, the oil leab intake channel is tilted upward, and the angle with lubrication ring set is 30 ° -45 °.
In above scheme, the electromagnetic coil from electric connection port by conducting wire respectively with electronic control unit and electric power storage
Pond anode is connected.
In above scheme, be equipped with oil leab groove inside the lubrication ring set, the both ends of oil leab groove respectively with
Oil leab intake channel is connected to oil leab exit passageway.
In above scheme, the oil leab groove is equipped with several hemispherical pits, and hemispherical pit bottom is machined with
Through-hole.
In above scheme, spherical ball is placed inside the hemispherical pit.
In above scheme, the depth of the oil leab groove is equal to the radius of ball.
In above scheme, the height of the hemispherical pit is equal to the radius of ball.
In above scheme, the thickness of the gasket seal is greater than the maximum lift of needle-valve.
The beneficial effects of the present invention are:
1. armature is mounted on control piston upper end in the present invention, it is located at oil injector body upper part, it is higher to require
Electromagnetic force demand and be equipped with sufficient reserved space, and the arrangement for high-pressure oil duct at atomizer provides adequate space.
2. directly the bottom for controlling piston is connected with needle-valve in the present invention, reset spring and needle at existing needle-valve are eliminated
The control room fuel pressure chamber of valve upper end simplifies fuel injector structure and eliminates the fluid power delay phenomenon of this part.
3. added a lubrication ring set in the middle section of control piston in the present invention, and lubricate ring set with control piston it
Between be point contact, rolling friction, not only play the role of stable motion, but also reduce friction, the response speed of needle-valve is mentioned
It rises, oil spout performance is made to be improved.
Detailed description of the invention
Fig. 1 is fuel injector principal section figure of the invention.
Fig. 2 is the partial enlarged view in Fig. 1 at A.
Fig. 3 is stress diagram at the pressure-bearing conical surface.
Fig. 4 is that diagram is unfolded in lubrication ring set of the invention.
In figure: 1- controls piston reset spring, 2- electric connection port, 3- oil injector body, 4- electromagnetic coil, 5- oil leab
Intake channel, 6- lubrication ring set, 7- oil leab exit passageway, 8- gasket seal, 9- control piston, 10- needle-valve, 11- spray orifice,
12- armature reset spring, 13- electromagnetism valve chest, 14- armature, 15- high-pressure oil duct, the 16- pressure-bearing conical surface, the hemispherical pit of 17-,
18- oil leab groove.
Specific embodiment
The present invention is further described with reference to the accompanying drawing.These attached drawings are simplified schematic diagram, only in a schematic way
Illustrate basic structure of the invention.
As shown in Figure 1 to 4, the high frequency response fuel injector of a kind of Design of High Pressure Common Rail Diesel Engine, including control piston reset bullet
Spring 1, electric connection port 2, oil injector body 3, electromagnetic coil 4, oil leab intake channel 5, lubrication ring set 6, oil leab outlet
Channel 7, gasket seal 8, control piston 9, needle-valve 10, spray orifice 11, armature reset spring 12, electromagnetism valve chest 13, armature 14, height
Pressure oil road 15, the pressure-bearing conical surface 16, hemispherical pit 17, oil leab groove 18.
As shown in Fig. 1 fuel injector principal section figure, 9 top of cylinder control piston is compressed with reset spring 1 to be connected, and control is lived
The top and oil injector body 3 for filling in reset spring 1, which compress, to be connected, and control 9 upper end of piston is fixedly connected with armature 14, middle section
Slidably nested encryptions are carried out with lubrication ring set 6,6 bottom of lubrication ring set and gasket seal 8, which compress, to be connected, and piston 9 is controlled
End portion is located in high-pressure oil duct 15；Lubricate 6 bottom of ring set and gasket seal 8 and compress and connect, can prevent oil leakage into
Enter in high-pressure oil duct 15, to avoid the lubricating oil of control 9 wall surface of piston from touching the fuel oil in high-pressure oil duct 15, gasket seal 8
Thickness be greater than the maximum lift of needle-valve 10；Electromagnetism valve chest 13 is arranged in cylindrical control 9 upper part of piston, and top
It is fixedly connected with oil injector body 3,13 bottom of electromagnetism valve chest is fixedly connected with lubrication ring set 6, and armature 14 is located at electromagnetism valve chest
Inside 13,14 top of armature is compressed with armature reset spring 12 to be connected, and 12 top of armature reset spring is compressed with oil injector body 3 to be connected
It connects, 13 inner tip of electromagnetism valve chest is additionally provided with electromagnetic coil 4, and electromagnetic coil 4 draws two connecting lines from electric connection port 2
It is connected respectively with electronic control unit (ECU) and battery positive voltage；10 head of needle-valve as shown in Figure 2 is semicircle spherical, spray
Spray orifice 11 on oily body 3 is processed into the arc-shaped of recess and 10 head of needle-valve coincide, and forms good sealing effect；Electromagnetic wire
When power is off, band moving armature 14 moves circle 4, under 12 collective effect of piston reset spring 1 and armature reset spring, controls needle-valve
10 move down, and are bonded so that needle-valve 10 is closely compressed with spray orifice 11.It is processed into inverted round table-like hold in control 9 bottom end of piston
The conical surface 16 is pressed, is fixedly connected at the top of the pressure-bearing conical surface 16 and needle-valve 10, is circle, diameter at the top of 16 bottom of the pressure-bearing conical surface and needle-valve
It is in the same size.
As shown in Figure 1, electromagnetism valve chest 13 is arranged in control 9 upper part of piston, provided to the arrangement of high-pressure oil duct 15
Sufficient space.In order to reduce the friction between oil injector body 3, spray to sufficient lubricating oil is provided in lubrication ring set 6
Oil leab intake channel 5 and oil leab exit passageway 7, oil leab intake channel 5 and oil leab are opened on oily body 3
Exit passageway 7 is connected to lubrication ring set 6, for the self gravity attribute for making full use of lubricating oil, automatic flowing, oil leab into
Mouth channel 5 tilts upward, and the angle with lubrication ring set 6 is 30 ° -45 °, for removal of lubricant as much as possible, oil leab
Exit passageway 7 is horizontally set on the bottommost of lubrication ring set 6.
As shown in figure 4, being equipped with oil leab groove 18 inside lubrication ring set 6, the arrangement shape of oil leab groove 18 is not
Limit, schematic diagram only shows the optimum layout form here；The both ends of oil leab groove 18 respectively with oil leab intake channel 5 and
Oil leab exit passageway 7 is connected to, and the depth of oil leab groove 18 is equal to the radius of ball, if oil leab groove 18 is equipped with
Hemispherical pit 17 is done, and 17 bottom of hemispherical pit is machined with through-hole, places spherical ball, ball inside hemispherical pit 17
Can be contacted by the through-hole of hemispherical 17 bottom of pit with oil leab groove 18, lubricated balls, reduce hemispherical pit 17 with
Control the friction between piston 9；The height of hemispherical pit 17 is equal to the radius of shape ball, can reduce the unstable of ball rotation
Property.
A kind of course of work of the high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine are as follows: as shown in figures 1 and 3, by electronics
Control unit (ECU) issues fuel injection pulse signal and controls 4 power on/off of electromagnetic coil；When energization, 14 the suction-combining force F of armature1
With 15 mesohigh fuel oil of high-pressure oil duct to the axial thrust load F of the pressure-bearing conical surface 162The sum of be greater than 12 pretightning force F of armature reset spring3With
Control 1 pretightning force F of piston reset spring4The sum of, needle-valve 10 is moved upwardly together with control piston 9, and spray orifice 11 is opened, fuel oil spray
It penetrates；When power-off, 12 pretightning force F of armature reset spring3With control 1 pretightning force F of piston reset spring4The sum of be greater than the pressure-bearing conical surface 16
Axial thrust load F2, needle-valve 10 with control piston 9 move downwardly together, 10 bottom of needle-valve is fitted closely with nozzle, spray orifice 11
It closes.
The embodiment is a preferred embodiment of the present invention, but present invention is not limited to the embodiments described above, not
In the case where substantive content of the invention, any conspicuous improvement that those skilled in the art can make, replacement
Or modification all belongs to the scope of protection of the present invention.
Claims (9)
1. a kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine, which is characterized in that including controlling piston (9), the control
It compresses and connects with reset spring (1) at the top of piston (9), the top and oil injector body (3) of reset spring (1), which compress, to be connected, control
Piston (9) upper end is fixedly connected with armature (14), and middle section and lubrication ring set (6) carry out slidably nested encryptions, lubrication
Ring set (6) bottom and gasket seal (8), which compress, to be connected, and is fixedly connected at the top of control piston (9) bottom and needle-valve (10), is lubricated ring
Set (6) is connected to the oil leab intake channel (5) and oil leab exit passageway (7) being arranged on oil injector body (3), is lubricated
Oil duct intake channel (5) tilts upward, and oil leab exit passageway (7) is horizontally disposed；The armature (14) is arranged in solenoid valve
Shell (13) is internal, and armature (14) top and armature reset spring (12) compress and connect, and at the top of armature reset spring (12) and sprays
Oily body (3) compresses connection, and electromagnetism valve chest (13) inner tip is additionally provided with electromagnetic coil (4), electromagnetism valve chest (13) bottom
It is fixedly connected with lubrication ring set (6).
2. fuel injector according to claim 1, which is characterized in that needle-valve (10) head is semicircle spherical, oil spout
Spray orifice (11) on body (3) is processed into the arc-shaped of recess and needle-valve (10) head coincide.
3. fuel injector according to claim 1, which is characterized in that the oil leab intake channel (5) tilts upward, with
The angle for lubricating ring set (6) is 30 ° -45 °.
4. fuel injector according to claim 1, which is characterized in that the electromagnetic coil (4) is led at electric connection port (2)
Conducting wire is crossed to be connected with electronic control unit and battery positive voltage respectively.
5. fuel injector according to claim 1, which is characterized in that it is recessed to be equipped with oil leab inside the lubrication ring set (6)
Slot (18), the both ends of oil leab groove (18) connect with oil leab intake channel (5) and oil leab exit passageway (7) respectively
It is logical.
6. fuel injector according to claim 5, which is characterized in that the oil leab groove (18) is equipped with several hemispherical
Pit (17), and hemispherical pit (17) bottom is machined with through-hole.
7. fuel injector according to claim 6, which is characterized in that place spherical rolling inside the hemispherical pit (17)
Pearl.
8. fuel injector according to claim 7, which is characterized in that the radius of the ball is equal to oil leab groove (18)
Depth, the height of hemispherical pit (17).
9. fuel injector according to claim 1, which is characterized in that the thickness of the gasket seal (8) is greater than needle-valve (10)
Maximum lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910197770.2A CN109869252A (en) | 2019-03-15 | 2019-03-15 | A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910197770.2A CN109869252A (en) | 2019-03-15 | 2019-03-15 | A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109869252A true CN109869252A (en) | 2019-06-11 |
Family
ID=66920589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910197770.2A Pending CN109869252A (en) | 2019-03-15 | 2019-03-15 | A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109869252A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188662A (en) * | 2020-01-07 | 2020-05-22 | 绵阳华博精工机械有限公司 | Valve mechanism |
| CN114483383A (en) * | 2022-01-28 | 2022-05-13 | 刘义亭 | Gas fuel injector |
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| EP2824311A1 (en) * | 2013-07-10 | 2015-01-14 | EFI Hightech AG | Piston element assembly, and fuel injector with a piston element assembly |
| DE102013219284A1 (en) * | 2013-09-25 | 2015-03-26 | Robert Bosch Gmbh | Pump, in particular high-pressure fuel pump for a fuel injection device of an internal combustion engine |
| CN106438143A (en) * | 2016-11-08 | 2017-02-22 | 杭州电子科技大学 | Solenoid valve controlled fuel injector of diesel engine |
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2019
- 2019-03-15 CN CN201910197770.2A patent/CN109869252A/en active Pending
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| JPH01313662A (en) * | 1988-06-09 | 1989-12-19 | Shinnenshiyou Syst Kenkyusho:Kk | Gas injection nozzle with solenoid valve |
| CN1075777A (en) * | 1991-12-10 | 1993-09-01 | 新苏舍柴油机有限公司 | The fuel injection valve of reciprocating internal combustion engine |
| US5205492A (en) * | 1991-12-16 | 1993-04-27 | Gregory Khinchuk | Fuel injection valve |
| US5235954A (en) * | 1992-07-09 | 1993-08-17 | Anatoly Sverdlin | Integrated automated fuel system for internal combustion engines |
| JPH07259652A (en) * | 1994-03-17 | 1995-10-09 | Mitsubishi Heavy Ind Ltd | Fuel and water injection device of water injection type diesel engine |
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| CN201818409U (en) * | 2010-10-29 | 2011-05-04 | 郑国璋 | Electric control high pressure common rail fuel injection device |
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| CN203146184U (en) * | 2013-04-19 | 2013-08-21 | 泗洪轩宇油嘴有限公司 | Needle valve structure capable of prolonging service life of oil nozzle |
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| DE102013219284A1 (en) * | 2013-09-25 | 2015-03-26 | Robert Bosch Gmbh | Pump, in particular high-pressure fuel pump for a fuel injection device of an internal combustion engine |
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| CN106438143A (en) * | 2016-11-08 | 2017-02-22 | 杭州电子科技大学 | Solenoid valve controlled fuel injector of diesel engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188662A (en) * | 2020-01-07 | 2020-05-22 | 绵阳华博精工机械有限公司 | Valve mechanism |
| CN114483383A (en) * | 2022-01-28 | 2022-05-13 | 刘义亭 | Gas fuel injector |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190611 |
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| RJ01 | Rejection of invention patent application after publication |