CN103635684B - The fuel injector of injector, especially internal combustion engine - Google Patents
The fuel injector of injector, especially internal combustion engine Download PDFInfo
- Publication number
- CN103635684B CN103635684B CN201280029117.1A CN201280029117A CN103635684B CN 103635684 B CN103635684 B CN 103635684B CN 201280029117 A CN201280029117 A CN 201280029117A CN 103635684 B CN103635684 B CN 103635684B
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- CN
- China
- Prior art keywords
- injector
- chamber
- valve
- storage volume
- volume
- 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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- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims 12
- 238000002347 injection Methods 0.000 description 17
- 239000007924 injection Substances 0.000 description 17
- 239000007921 spray Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
-
- 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
- F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/003—Valve inserts containing control chamber and valve piston
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to the fuel injector of a kind of injector, especially internal combustion engine, with actuator module（8）, the actuator module controls the valve for adjusting flow rate（15）, wherein, the valve（15）It is used in the control chamber for controlling piston（14）It is connected with area of low pressure.According to the present invention, there is provided an injector, the injector is improved in terms of its manufacturing process.It is achieved in that the control chamber（4）It is connected with a storage volume, wherein, the length of the volume chamber of the storage volume is configured to unrelated with the injector, is all with identical length for different injectors.
Description
Technical field
The present invention relates to the fuel injector of a kind of injector, especially internal combustion engine, with actuator module, the actuating
Device module controls the valve for adjusting flow rate, wherein, the valve is used in the control chamber for controlling piston
It is connected with area of low pressure.
Background technology
This injector is known from DE102007044356A1.This injector is used to inject fuel into the combustion of internal combustion engine
Burn in chamber, it has the adjustable needle body between the open position that closing position and starting fluid flow, and the needle body can
Controlled using the valve with sleeve valve components, and wherein described valve components and the valve seat phase interaction being arranged on structural detail
With.This injector has by the valve components around and with the pushing pin that separates of the structural detail, and the valve seat
It is configured to cylindrical cone.Finally, arrange a chamber in the valve body of the injector, the chamber by passage with the spray
The area of low pressure connection of emitter.
The content of the invention
Task of the invention is to provide a kind of injector, and the injector is improved in terms of its manufacturing process.
The settling mode of this task is that the control chamber is connected with a storage volume, the cavity volume of the storage volume
Room length is configured to unrelated with injector, identical for different injectors all length.The understanding that this configuration is based on is base
In structure injector that is true and for example being needed in internal combustion engine case client there are different total lengths, wherein, the spray
A part for emitter especially spraying system.This spraying system has a high-pressure pump, and the high-pressure pump is by the fluid of fuel forms
Medium is supplied in high pressure accumulator.The high pressure accumulator is using the injector connection constituted according to the present invention, the injection
The fuel injection that device will be conveyed from high pressure accumulator to internal combustion engine configuration injector combustion chamber in.For example, by difference
Under conditions of the cylinder of internal-combustion engine of ground design, there are different total lengths for the injector of different internal combustion engines.Then, it is described to deposit
The volume chamber length for storing up volume constitutes identical length now for different injectors, and the injector is in the manufacture work
Skill aspect is standardized and then manufacturing cost is lowered.The reduction of manufacturing cost is because for the injection of different length
Device, only have to provide a boring bar tool for manufacturing the storage volume.Further, by the standard of the injector
Change, until including storage volume including region in, the precision of the jet performance of preferably mutually coordinated different injectors.In
It is to obtain for example particularly simple control device, the control device no longer must differently coordinate each injector.
Injector control chamber with storage volume is constructed according to following understanding：
In inactive state, under injector situation constructed according to the invention, closing force is more than by fuel formation
Opening force.The closing force because control chamber in change in pressure, wherein, in inactive state, control chamber in locate
Under high pressure.The control chamber by input channel using the entrance throttle that opens with the high-pressure area of fuel system
Connection, and it is described control chamber by passing away using open, valve control speed control muffler and with the fuel system
Area of low pressure connection.By operating the actuator module and thus causing the valve to be opened, the pressure in the control chamber
Power declines and the control piston leaves from valve seat, is moved in the valve body tapered end of the injector, and the control piston is outstanding
It is configured to needle body.When the valve is closed, the passing away closure, and the fuel bypassed by input channel, it is described
Needle body is moved on the valve seat again.Therefore the injection terminates.Now consider the injection channel unlatching and closed
In journey and by controlling the pressure differential Activate pressure ripple in chamber, the pressure wave directly affects the injection accuracy of measurement and many
Secondary jet power.In the very short interval between spraying twice, existing injector produces very big mixed recharge.Pass through
Storage volume is configured to so-called " micro- rail " on the injector, wherein the storage volume is under fuel high pressure, these pressure
Fluctuation is attenuated.This has following result, i.e., the mixed recharge between spraying twice is obviously reduced and accuracy of spray is improved.Principle
On, the construction and arrangement of the storage volume for function of the present invention are variable.If but the it was demonstrated that storage volume
Be with the control storage chamber that be connected of chamber, this is favourable, in another design, the storage chamber and at least
It is arranged in as much as possible in the valve body of the injector.Herein, all characteristics for belonging to the injector of determination are deposited on described
The construction and size for storing up volume can all be considered.
Proposed again in another design, the storage chamber is connected with valve body convex shoulder and is grounded along valve body around described
Needle body ground extends.Now, the section of valve body guide end side be projected into the storage chamber and in this region by
It is oriented to.Then, the storage chamber is allowed in the injector is incorporated on the premise of not changing the manufacturing cost of injector.
In improvement project of the invention, the injector has different total lengths, and the injector has consistent
Volume chamber length y, on the convex shoulder of its injection side end that the storage volume is extended to from valve body convex shoulder.Now, institute
State storage volume and constitute identical diameter d again under different injector situations, be can be used hence for all of application scenarios
Identical instrument.Overall diameter ds of the diameter d relative to valve bodyA, about d=0.3xdATo d=0.55xdA, total length y is relative to straight
Footpath d, about y=6xd to y=9.5xd.
In another design of the invention, total storage volume approximately equal of the injector of different length.It is described total
Storage volume is mainly determined by the actual volume of the storage chamber.Storage sub-chamber additionally determines always to deposit to a small extent
Storage volume, wherein, the storage sub-chamber is determined by the actual volume obtained to the valve seat from the convex shoulder, so that each spray
Difference of the emitter on total length does not produce big influence to thus obtained different total storage volumes.Produced difference can
The insertion depth that is for example adapted in storage chamber by needle guiding part is compensated.
In improvement project of the invention, total storage volume of minimum possible injector and possible injector most long
Than in the range of 0.8 to 1.2, in the range of preferably 0.95 to 1.05.This design has proved to be particularly advantageous.
In a word, design of the invention allows advantage is obtained that：
The amount of feeding of-the high-pressure pump is reduced to minimum,
- carried out in low pressure（New）Start,
- tooling style is reduced to minimum,
- apply stressed surface and reduced,
The performance t of-injectordiffImproved,
Total storage volume of-injector interior does not rely on injector length, be it is approximate consistent,
- manufacturing process is simplified,
- start pressure and do not rely on injector length, improved and be it is approximate consistent,
- because applying, stressed surface is smaller, pressure fatigue intensity is improved,
- multi-injection ability is improved（tdiff- performance）, and
- injection accuracy of measurement is improved（tdiff- performance）.
Other expedients scheme of the invention is obtained from brief description of the drawings, this hair is set forth in the description of the drawings
Embodiment shown in bright figure.
Brief description of the drawings
It is shown in the drawings：
The sectional side elevation that Fig. 1 passes through injector of the invention；With
Each sectional side elevation that two valve body cuttings of Fig. 2 through the injector for different length ground construction are obtained.
Specific embodiment
Fig. 1 shows fuel injector, is particularly suited for the common rail fuel injection system of self-igniting internal combustion engine.In this common rail
In spraying system, fuel is supplied by high pressure accumulator by high-pressure pump（Rail）And store in high pressure accumulator.According to the present invention
Fuel injector be connected by pressure piping with high pressure accumulator, the spiral shell of connecting tube 1 of the pressure piping and fuel injector
Tether and connect.Filter 2 is arranged in connecting tube 1, and impurity that may be present is away from fuel injector in making fuel.
The fuel supplied by connecting tube 1 is supplied to control chamber 4, control by being provided with the input channel 3 of choke valve
Chamber 4 is in the end side of needle body 5 is arranged in needle guiding part 6.Needle guiding part 6 is in side abutting on valve body convex shoulder 20
Mode be arranged and secured within valve body 7, wherein, connecting tube 1 is also bolted in valve body 7.Further, actuator module
8 are arranged near needle guiding part 6 or valve body 7, and its function will be described hereinafter.
Valve body tapered end 9 utilizes locking nut 10, is fixed on valve body 7 oppositely with control chamber 4.Needle body 5 is with pin
Body tapered end 11 is extended up in the end side region of valve body tapered end 9, and constitutes valve seat 19, and fuel is entered by permission needle tapered end 11
The injection channel 12 for entering, by injection channel 12, opens the combustion chamber for being ejected into internal combustion engine under state, spray in needle body 5
Fuel supply structure of the passage 12 by being described below is penetrated to close.
In order to supply the fuel to the valve seat 19 of the upstream of injection channel 12, feed path 3 is by a flow channel along needle body 5
And be connected with the chamber before valve seat 19, wherein, valve seat 19 is made up of needle body tapered end 11 and valve body tapered end 9.At this
In flow channel, storage chamber 16 is switched in the valve body 7 of needle body 5.Further, same not shown flowing connection from
Needle compression spring chamber 18 is directed to, until the needle tapered end 11 being connected on valve seat 19.Further, needle body 5 is from arrangement
Needle body spring 13 in needle body spring chamber 18 then, controls the fuel in chamber 4 towards compression on the direction of valve seat 19
The pressure support ventilation of pressure effect is on needle body 5.
In order that needle body 5 and its needle body tapered end 11 are moved in open position with by the spray fuel of injection channel 12,
Fuel pressure in control chamber 4 generally reduces, until the fuel pressure for existing overcomes on the direction of direction control chamber 4
The power of needle body spring 13, compresses needle body 5.
In order to control the fuel pressure in chamber 4 is controlled, control chamber 4 is by passing away 14 using the throttling connected
Valve and be connected with the valve 15 operated by actuator module 8, wherein, valve 15 is in the area of low pressure of actuator module side and fuel system
Connection.If valve 15 is moved in its open position by actuator module 8, fuel passes through passing away 14 from control chamber 4
In flowing to the area of low pressure of fuel system via valve 15, and the pressure in chamber 4 is controlled therefore to decline.Now, feed path 3
It is coordinated with the choke valve in passing away 14, so that being flowed by feed path 3 by the fuel ratio that passing away 14 flows out
Enter many to the fuel in control chamber 4.
Opened with closing course by needle body 5 in valve 15 and passing away 12, Activate pressure ripple, the pressure wave is direct
Influence injection accuracy of measurement and multi-injection ability.This pressure wave is propagated simultaneously in the flow channel for above having defined on the whole
And until valve seat 19 and the injection channel 12 for being connected.
In order at least reduce this pressure wave, control chamber 4 is connected with storage chamber 6, and control chamber 6 is around the ground of needle body 5
It is arranged in valve body 7.Storage chamber 16 with major diameter and and then extended to from control chamber 4 with big volume in valve body 7 first
Convex shoulder 17（And also pass through needle body spring chamber 18 until valve seat 19 with swedged other memory sub-chamber）.
Figure 2 illustrates two valve bodies 7 of the injector of different length.From length defined in valve body convex shoulder 20 to convex shoulder 17
Degree y length in the case of two valve body 7 is identical.
Claims (11)
1. a kind of method of the injector for manufacturing different length, the injector has actuator module (8), the actuator mould
Block (8) controls the valve (15) for adjusting flow rate, wherein, the valve (15) is used in the control for controlling piston
Chamber (4) processed is connected with area of low pressure, and methods described is implemented in the following manner：Make control chamber (4) with a storage volume
Connection, the injector with different length does not all rely on injector ground to the volume chamber length configuration of the storage volume in pairs
With identical length.
2. method according to claim 1, it is characterised in that the storage volume is storage chamber (16).
3. method according to claim 2, it is characterised in that the storage chamber (16) is arranged in the valve of the injector
In body (7).
4. according to the method in claim 2 or 3, it is characterised in that the storage chamber (16) and valve body convex shoulder (20) phase
Connection ground extends along valve body (7) around control piston, and the control piston is configured to needle body (5).
5. the method according to any one of claim 1-3, it is characterised in that total storage volume is more than 1500cm3。
6. the method according to any one of claim 1-3, it is characterised in that the injector with different total lengths has
The consistent volume chamber length y that a convex shoulder (17) is extended to from valve body convex shoulder (20).
7. the method according to any one of claim 1-3, it is characterised in that the injector with different length is always deposited
Storage volume is equal.
8. the method according to any one of claim 1-3, it is characterised in that total storage of minimum possible injector is held
The ratio between product and possible injector most long are in the range of 0.8 to 1.2.
9. method according to claim 1, it is characterised in that the injector is the fuel injector for internal combustion engine.
10. method according to claim 5, it is characterised in that total storage volume is more than 2000cm3。
11. methods according to claim 8, it is characterised in that total storage volume of minimum possible injector with it is most long
The ratio between possible injector is in the range of 0.95 to 1.05.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011077618A DE102011077618A1 (en) | 2011-06-16 | 2011-06-16 | Injector, in particular fuel injector for an internal combustion engine |
| DE102011077618.4 | 2011-06-16 | ||
| PCT/EP2012/059614 WO2012171767A1 (en) | 2011-06-16 | 2012-05-23 | Injector, in particular fuel injector for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103635684A CN103635684A (en) | 2014-03-12 |
| CN103635684B true CN103635684B (en) | 2017-06-20 |
Family
ID=46320897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280029117.1A Active CN103635684B (en) | 2011-06-16 | 2012-05-23 | The fuel injector of injector, especially internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2721282B1 (en) |
| CN (1) | CN103635684B (en) |
| DE (1) | DE102011077618A1 (en) |
| WO (1) | WO2012171767A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697922A (en) * | 2003-03-04 | 2005-11-16 | 西门子公司 | High pressure fuel accumulator |
| EP1967727A2 (en) * | 2007-03-08 | 2008-09-10 | Robert Bosch Gmbh | Fuel injector with improved implementation of a control valve for controlling an injection needle |
| CN101415934A (en) * | 2006-04-04 | 2009-04-22 | 罗伯特·博世有限公司 | Fuel injector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007044356A1 (en) | 2007-09-17 | 2009-03-19 | Robert Bosch Gmbh | injector |
| DE102009046582A1 (en) * | 2009-11-10 | 2011-05-12 | Robert Bosch Gmbh | Method for manufacturing a fuel injection valve and fuel injection valve |
| DE102009055129A1 (en) * | 2009-12-22 | 2011-06-30 | Robert Bosch GmbH, 70469 | Fuel injector |
| DE102010003202A1 (en) * | 2010-03-24 | 2011-09-29 | Robert Bosch Gmbh | Common rail injector with pressure compensated switching valve and additional storage volume |
-
2011
- 2011-06-16 DE DE102011077618A patent/DE102011077618A1/en not_active Withdrawn
-
2012
- 2012-05-23 CN CN201280029117.1A patent/CN103635684B/en active Active
- 2012-05-23 EP EP12728421.4A patent/EP2721282B1/en active Active
- 2012-05-23 WO PCT/EP2012/059614 patent/WO2012171767A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697922A (en) * | 2003-03-04 | 2005-11-16 | 西门子公司 | High pressure fuel accumulator |
| CN101415934A (en) * | 2006-04-04 | 2009-04-22 | 罗伯特·博世有限公司 | Fuel injector |
| EP1967727A2 (en) * | 2007-03-08 | 2008-09-10 | Robert Bosch Gmbh | Fuel injector with improved implementation of a control valve for controlling an injection needle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2721282B1 (en) | 2018-07-11 |
| CN103635684A (en) | 2014-03-12 |
| WO2012171767A1 (en) | 2012-12-20 |
| DE102011077618A1 (en) | 2012-12-20 |
| EP2721282A1 (en) | 2014-04-23 |
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