CN103339366B - Fuel injector - Google Patents
Fuel injector Download PDFInfo
- Publication number
- CN103339366B CN103339366B CN201180066228.5A CN201180066228A CN103339366B CN 103339366 B CN103339366 B CN 103339366B CN 201180066228 A CN201180066228 A CN 201180066228A CN 103339366 B CN103339366 B CN 103339366B
- Authority
- CN
- China
- Prior art keywords
- bonder
- piston
- nozzle needle
- fuel injector
- chamber
- 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.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims description 35
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 239000012190 activator Substances 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 206010008469 Chest discomfort Diseases 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of Fuelinjection nozzle (10), it has the area of low pressure (40) being formed in case of sprayer (11), the actuator (44) being configured to especially piezo-activator in described area of low pressure interacts with the first fluid coupling, described first fluid coupling has main piston (47), described main piston with nozzle needle (22) at least indirectly being connected, wherein, when described actuator (44) is energized, described main piston (47) causes described nozzle needle (22) to promote from seal receptacle (23), and nozzle needle (22) is arranged in the high pressure chest (18) of described case of sprayer (11).According to the present invention, arranging second fluid coupling with at least one bonder piston (57,63), when described actuator (44) discharges, at least one bonder piston described produces closing force on described nozzle needle (22).
Description
Technical field
The present invention relates to a kind of fuel injector.
Background technology
From the known this Fuelinjection nozzle of DE 10 2,008 054 421 A1 of applicant.Known fuel
Ejector includes a main piston being connected with piezo-activator, and described main piston is immersed in receptor
In the hole of piston.Described receptor piston is the most movable in case of sprayer for it.
The unit constituted with main piston and portable piston forms the first fluid coupling, at described piezo-activator
During energising, the nozzle needle abutting on valve seat is caused to open.Further, public in the document mentioned
Having opened throttling passage to construct on nozzle needle, described throttling passage is in the high-pressure area of described injector body
In cause the pressure differential in the high-pressure area segment space being arranged in throttling passage top or bottom so that
Described nozzle needle hydraulic loaded on closing direction.Therefore, actuator in known fuel injector
Relatively small power be sufficient for causing described nozzle needle to open and Guan Bi.Here defect is because of described
Pressure drop high on throttling passage and produce this closing force, thus reduce the efficiency of ejector.
Summary of the invention
From prior art, the task of the present invention is to improve existing fuel injector, not only opens
Power and closing force are delivered on described nozzle needle by actuator, and thus fuel injector can obtain
To the piezo-activator with relatively simple or little structure.In addition obtain the less pressure loss and
Thus the highest efficiency.
This task profit solves by having the fuel injector of inventive feature.The design of the present invention
It is to provide a kind of fuel injector with two fluid couplings, a fluid coupling to be used for out
Open described nozzle needle, and described closing course supported by another fluid coupling.
The favourable improvement project of the fuel injector according to the present invention is given in other describe.Optionally
All combinations of at least two in the feature disclosed in embodiment, description and/or accompanying drawing fall within
In the framework of the present invention.
Thering is provided in a particularly preferred design of the present invention, two fluid couplings have phase
Same stroke conversion ratio.Thus about the ratio that opening travel is identical with closing stroke offer, thus close
The pressure loss closed on choke valve can reduce, and obtains the cause required for the nozzle needle stroke of needs
Dynamic device is sized to reduce.
The structural design scheme of a relatively small space requirement of preferred needs provides, described nozzle
Pin is connected with bonder piston apparatus and described bonder piston apparatus and the first bonder chamber phase interaction
In order to produce for the opening force of nozzle needle and to interact to produce for nozzle with the second bonder chamber
The closing force of pin.
The most particularly preferred embodiment is that described bonder piston apparatus includes two phases
Two of bonder piston on the contact surface and described bonder piston of reclining mutually deviate from contact surface
Two bonder chambeies of end face gauge.This structure or the layout of described bonder piston this have the advantage that
When described bonder piston (simultaneously) is moved, can not produce in described bonder piston apparatus should
Power, as being otherwise very easy to due to the PT positional tolerance of parts occur.Additionally, this layout may make
Use the second coupler body, thus realize the structure that structure is relatively small.
Connecting tube structure in particularly advantageous further embodiment, between two bonder chambeies
Choke valve for the motion for affecting described nozzle needle.The fortune of the opening movement of the most described nozzle needle
Dynamic feature relatively simply adapts to the boundary condition of each needs.
The preferred structure improvement project of the present invention provides, by cover closure the 3rd bonder chamber, described lid
Plate utilizes the spring force pressure end face by described coupler body of preloading spring.This design realizes described spray
The relatively simple structure of emitter and the relatively simple assembling of parts.
Thering is provided in another preferred design of the present invention, described nozzle needle constructs one in high pressure chest
Individual throttle valve gear is for affecting the motion of described nozzle needle.This design realizes the most simpler side
Formula method affects the motion of described nozzle needle.
More advantages, feature and the details of the present invention obtain from the description below of preferred embodiments and drawings.
Accompanying drawing explanation
The present invention illustrates the fuel injector according to the present invention with simplified partial view in unique accompanying drawing
Longitudinal section.
Detailed description of the invention
Ejector 10 according to the present invention shown in unique view, as it is especially used as will combustion
The ingredient of the so-called common-rail injection system that material is ejected in unshowned combustion chambers of internal combustion engines.At this
In, the case of sprayer 11 that ejector 10 constructs with having multipart.Case of sprayer 11 example
Property ground on the side deviate from combustion chambers of internal combustion engines, include case lid 12, case lid 12 with in sleeve shaped housing
Between part 13 connect.On the axial direction of case of sprayer 11, the first plate shape coupler body 14 He
Second is connected to described housing mid-section with the coupler body 15 of model shape divides on 13.Bottom ejector
Part 16 is again on the side that the first coupler body 14 is opposite to be connected in the second coupler body 15.
Recess 17 constructs in ejector base section 16, the high pressure chest 18 of gauge ejector 10.
To this end, high pressure chest 18 utilizes divides 13 and housing by the second coupler body 14,15, housing mid-section
The feed paths 19 of lid 12 composition and with pressure source 20, especially so-called track, connection.
On the bottom of recess 17, nozzle needle 22 and ejector base section 16 constitute seal receptacle
23, in the make position of nozzle needle 22, preferred multiple through holes 24 are closed, when nozzle needle 22 is opened
By multiple through holes 24, fuel under high pressure is ejected in combustion chambers of internal combustion engines.
Nozzle needle 22 is directed in recess 17 in bearing body 25, wherein at bearing body 25
With composition fluidly connects between nozzle needle 22.At bearing body 25 upper nozzle pin 22, there is choke block 28
The throttle point 27 of form.Affect extraly by throttle point 27 or choke block 28 or control nozzle needle
The motion of 22.
Nozzle needle 22 also has convex shoulder 30, and nozzle closing spring 31 is bearing on convex shoulder 30.Nozzle closes
The opposite side closing spring 31 is bearing on the downside of the second coupler body 15.
Nozzle needle 22 connects with the axle 32 being connected piston 33.Axle 32 slides in seal sleeve 35,
Seal sleeve 35 abuts in the downside of the second coupler body 15 and hermetically therefore relative to high pressure chest 18
Seal the second coupler body 15 or separated.In the second coupler body 15 towards seal sleeve
Having annular chamber 36 on the end face of 35 in the region of axle 32, annular chamber 36 is by drain hole 37
The recess 39 dividing 13 with housing mid-section connects.Sealing can be introduced through by annular chamber 36
Sleeve 35, fuel under high pressure flows into recess 39.Recess 39 constitutes the low pressure of ejector 10
Region 40, area of low pressure 40 is by return port 41 with the fuel return structure of fuel injection system even
Logical.Entering into above seal sleeve 35 by cannelure 36, fuel under high pressure flows into recess 39
In.Recess 39 constructs the low-pressure section 40 of ejector 10, and return port is passed through in area of low pressure 40
41 and with the fuel return fabric connectivity of fuel injection system.
For handling the actuator arrangement of nozzle needle 22 in the recess 39 of case of sprayer 11,
I.e. in area of low pressure 40, its form is piezo-activator 44.Piezo-activator 44 has connecting line
Line 45, piezo-activator 44 triggers by connecting cable 45 electricity.Here piezo-activator 44 is arranged
Have during for making and observing on the longitudinal direction of ejector 10 under piezo-activator is not powered on state
Little length and the rotation on the axial direction of ejector 10 when energising.
In the first coupler body 14, the side towards recess 39 is configured to main piston 47
Be configured to cylinder pilot hole 46, main piston 47 is the parts of the first fluid coupling.Main piston
47 are connected with support plate 49 by connecting rod 48, and piezo-activator 44 is arranged on support plate 49.
Pilot hole 46 and closure plate 52 seal closure, wherein, closure plate 52 has for connecting rod 48
Through hole 53.
Preloading spring 55 is bearing between closure plate 52 and support plate 49, on the one hand preloading spring 55
Make closure plate 52 to the first fluid coupling 14 be associated with it end face apply pressure, on the other hand,
Preloading spring 55 makes support plate 48, together with piezo-activator 44, case lid 12 be applied pressure.
The axle 32 connecting piston 33 utilizes portable piston 57 effect to be connected to opposite with nozzle needle 22
Side on.Portable piston 57 is slidably guided in pilot hole 58, and pilot hole 58 is towards first
Construct on the side of fluid coupling 14 in second fluid coupling 15.First fluid coupling 14 has again
Having pilot hole 59, pilot hole 59 has the diameter of reduction relative to pilot hole 58, wherein, leads for two
Mutually coaxially it is orientated to hole 58,59.
Pilot hole 58 constructs the first bonder on the side towards nozzle needle 22 of portable piston 57 bottom
Chamber 61.Portable piston 57 is the parts of the bonder piston apparatus 62 of the second fluid coupling, except taking
Row piston 57 is outer also includes another bonder piston 63, and another bonder piston 63 is at pilot hole 59
In be slidably guided to and utilize its end face towards portable piston 57 to abut in portable piston 57
End face on.Another bonder piston 63 is deviating from the side upper control limit of portable piston 57 by pilot hole 59
Second bonder chamber 65 of structure.
Second bonder chamber 65 is connected with the 3rd bonder chamber 67, the 3rd coupling by interface channel 66
Clutch chamber 67 is by gauge on the upside of pilot hole 46, closure plate 52 and main piston 47.Main piston 47 times
Side and pilot hole 46 construct the 4th bonder chamber 69, and the 4th bonder chamber 69 is by interface channel 71
And couple with the first bonder chamber 61.In order to affect the movement velocity of nozzle needle 22, interface channel 71
Here can be configured to choke valve.
The most such geometry, between the i.e. the 4th bonder chamber 69 and the first bonder chamber 61
Area ratio between area ratio and the 3rd bonder chamber 67 and the second bonder chamber 65 etc. are big.
The operation principle of the ejector 10 described up till now is as follows: shown in Fig. 1 of nozzle needle 22
In make position, piezo-activator 44 not energising.In order to inject fuel into the combustor of internal combustion engine
In, nozzle needle 22 promotes from seal receptacle 23, to open through hole 24.To this end, piezo-activator 44
Energising or electric discharge.The energising of piezo-activator 44 causes piezo-activator 44 to stretch in the axial direction
Exhibition.Because piezo-activator 44 is coupled with main piston 47, piezo-activator 44 by connecting rod 48
The spring force of preloading spring 55 is overcome to extend in pilot hole 46.Thus, in the 4th bonder chamber
69 fuel existed are discharged in the first bonder chamber 61 by interface channel 71, thus open and make every effort to overcome
Take the power of nozzle closing spring 31 and produce on portable piston 57.Here fuel is simultaneously from second
Bonder chamber 65 is discharged in the 3rd bonder chamber 67 by interface channel 61.
For closed-nozzle pin 22, piezo-activator 44 discharges.Thus, the length of piezo-activator 44
Degree reduces, so that piezo-activator 44 is total to support plate 49 under the spring-force driven dual of preloading spring 55
Move upward with the side in case lid 12.Support plate 49 carries main piston here by connecting rod 48
47, so that fuel is discharged to the second bonder chamber 65 from the 3rd bonder chamber 67 by interface channel 66
In.Therefore the fuel pressure raised in the second bonder chamber 65 causes bonder piston apparatus 62 to exist
Move on the closing direction of nozzle needle 22.Now fuel passes through interface channel from the first bonder chamber 61
71 are discharged in the 4th bonder chamber 69.
The diameter of piston 32 and the diameter of seal receptacle 23 are coordinated overlapping one another, nozzle needle 22 it
Make position at least approximates dynamic balance.This shows that hydraulic coupling makes nozzle needle 22 in the fortune of nozzle needle 22
When dynamic side looks up completely or at least approximation promote and nozzle needle 22 with the power reduced in proportion and because of
And can move rapidly in high pressure chest 18.
On the premise of without departing from the design of the present invention, ejector 10 described up till now can be with multiple
Methods conversion or amendment.Thus the such as second coupler body 15 and seal sleeve 35 are also associated,
I.e. can be configured to one single piece.Also it is proposed that one only arranged in bonder piston 57,63
Or two bonder pistons 57,63 are set to one single piece.
Claims (11)
1. fuel injector (10), have the area of low pressure (40) of structure in case of sprayer (11),
In area of low pressure (40), actuator (44) and first coupling fluid-structure with main piston (47)
Device acts on jointly, and described main piston (47) couples the most indirectly with nozzle needle (22), wherein, and institute
Stating main piston (47) causes described nozzle needle (22) from sealing when described actuator (44) loads
Seat (23) promotes, and wherein, described nozzle needle (22) is arranged in described case of sprayer (11)
High pressure chest (18) in, it is characterised in that arrange and there is the second liquid of at least one bonder piston
Mechanical couple, described in when described actuator (44) unloads, at least one bonder piston is in described spray
Mouth pin produces closing force on (22), wherein, and at least one coupling described of described second fluid coupling
Clutch piston (63) is arranged to area of low pressure (40) effect with described case of sprayer (11) even
Connect.
Fuel injector the most according to claim 1, it is characterised in that
Described first fluid coupling and described second fluid coupling have identical stroke conversion ratio.
Fuel injector the most according to claim 1 and 2, it is characterised in that
Described nozzle needle (22) is connected with bonder piston apparatus (62) and described bonder piston
Device (62) and the first bonder chamber (61) interact to produce opening for nozzle needle (22)
Qi Lihe and the second bonder chamber (65) interact to produce the closing force for nozzle needle (22).
Fuel injector the most according to claim 3, it is characterised in that
Described bonder piston apparatus (62) includes two bonders reclined the most stackedly
Piston, and two of described bonder piston deviate from two bonders of end face gauge of described contact surface
Chamber.
Fuel injector the most according to claim 1 and 2, it is characterised in that
Described main piston (47) or at least one bonder piston are arranged at least one coupler body
In, at least one coupler body wherein said is by the area of low pressure (40) of described case of sprayer (11)
Separate with high pressure chest (18).
Fuel injector the most according to claim 3, it is characterised in that
Described main piston (47) is slidably guided in the hole (46) of coupler body (14), institute
State two opposite end face gauges the 3rd bonder chamber (67) and the 4th coupling of main piston (47)
Device chamber (69), wherein, described 3rd bonder chamber (67) by the first interface channel (66) with
Described second bonder chamber (65) connects to produce the closing force for nozzle needle (22) and described the
Four bonder chambeies (69) are connected with the first bonder chamber (61) by the second interface channel (71)
To produce the opening force for nozzle needle (22).
Fuel injector the most according to claim 6, it is characterised in that
At least one in described first interface channel and described second interface channel is configured to impact
The choke valve of the motion of described nozzle needle (22).
Fuel injector the most according to claim 6, it is characterised in that
Described 3rd bonder chamber (67) by closure plate (52) close, described closure plate (52) by
The spring force pressure of preloading spring (55) leans against on the end face of described coupler body (14).
Fuel injector the most according to claim 8, it is characterised in that
Opposite with closure plate (52) at described main piston (47) of described preloading spring (55)
It is bearing on side on the support plate (49) being connected with described main piston (47), described support plate (49)
To described main piston (47) on the closing direction of nozzle needle (22) together with described actuator (44)
Applying power.
Fuel injector the most according to claim 1 and 2, it is characterised in that
Described nozzle needle (22) has for affecting described nozzle needle (22) in high pressure chest (18)
The throttle valve gear (28) of motion.
11. fuel injectors according to claim 1, it is characterised in that described actuator (44)
It is configured to piezo-activator.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011003443.9 | 2011-02-01 | ||
| DE201110003443 DE102011003443A1 (en) | 2011-02-01 | 2011-02-01 | fuel injector |
| PCT/EP2011/074322 WO2012104000A1 (en) | 2011-02-01 | 2011-12-30 | Fuel injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103339366A CN103339366A (en) | 2013-10-02 |
| CN103339366B true CN103339366B (en) | 2016-11-09 |
Family
ID=45476503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180066228.5A Expired - Fee Related CN103339366B (en) | 2011-02-01 | 2011-12-30 | Fuel injector |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2670970B1 (en) |
| CN (1) | CN103339366B (en) |
| DE (1) | DE102011003443A1 (en) |
| WO (1) | WO2012104000A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012212614A1 (en) * | 2012-07-18 | 2014-01-23 | Continental Automotive Gmbh | Piezo injector with hydraulically coupled nozzle needle movement |
| DE102012222509A1 (en) | 2012-12-07 | 2014-06-12 | Continental Automotive Gmbh | piezoinjector |
| DE102012223934B4 (en) | 2012-12-20 | 2015-10-15 | Continental Automotive Gmbh | piezoinjector |
| DE102014206969A1 (en) | 2014-04-10 | 2015-10-15 | Robert Bosch Gmbh | fuel injector |
| DE102014206975A1 (en) | 2014-04-10 | 2015-10-15 | Robert Bosch Gmbh | fuel injector |
| DE102014206971A1 (en) | 2014-04-10 | 2015-10-15 | Robert Bosch Gmbh | fuel injector |
| DE102014210101A1 (en) | 2014-05-27 | 2015-12-03 | Robert Bosch Gmbh | fuel injector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10333573B3 (en) * | 2003-07-24 | 2004-11-18 | Robert Bosch Gmbh | Fuel injection arrangement has hydraulic coupler piston(s) with central fill volume connected to guide gap and to fuel feed line, one piston fixed to actuator and one to valve needle via piston rod |
| DE10333698A1 (en) * | 2003-07-24 | 2005-02-24 | Robert Bosch Gmbh | Fuel injection device for combustion engine has injection valve, control valve operated by actuator via hydraulic coupler with filling chamber in central longitudinal region of piston(s) connected to fuel passages and line |
| DE102008054421A1 (en) * | 2008-12-09 | 2010-06-10 | Robert Bosch Gmbh | Fuel injector for use in motor vehicle, has bar including actuator-side end that extends into low pressure range and is hydraulically coupled with actuator, where circular seat is provided at input side of injection nozzle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004176656A (en) * | 2002-11-28 | 2004-06-24 | Denso Corp | Fuel injection valve |
| DE102006026400A1 (en) * | 2006-06-07 | 2007-12-13 | Robert Bosch Gmbh | Fuel injector with servo assistance |
| DE502007002482D1 (en) * | 2007-03-15 | 2010-02-11 | Ford Global Tech Llc | injector |
| JP2009019565A (en) * | 2007-07-11 | 2009-01-29 | Toyota Motor Corp | Fuel injection device |
| DE102007032741A1 (en) * | 2007-07-13 | 2009-01-15 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
-
2011
- 2011-02-01 DE DE201110003443 patent/DE102011003443A1/en not_active Withdrawn
- 2011-12-30 EP EP11807956.5A patent/EP2670970B1/en not_active Not-in-force
- 2011-12-30 WO PCT/EP2011/074322 patent/WO2012104000A1/en active Application Filing
- 2011-12-30 CN CN201180066228.5A patent/CN103339366B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10333573B3 (en) * | 2003-07-24 | 2004-11-18 | Robert Bosch Gmbh | Fuel injection arrangement has hydraulic coupler piston(s) with central fill volume connected to guide gap and to fuel feed line, one piston fixed to actuator and one to valve needle via piston rod |
| DE10333698A1 (en) * | 2003-07-24 | 2005-02-24 | Robert Bosch Gmbh | Fuel injection device for combustion engine has injection valve, control valve operated by actuator via hydraulic coupler with filling chamber in central longitudinal region of piston(s) connected to fuel passages and line |
| DE102008054421A1 (en) * | 2008-12-09 | 2010-06-10 | Robert Bosch Gmbh | Fuel injector for use in motor vehicle, has bar including actuator-side end that extends into low pressure range and is hydraulically coupled with actuator, where circular seat is provided at input side of injection nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011003443A1 (en) | 2012-08-02 |
| EP2670970A1 (en) | 2013-12-11 |
| EP2670970B1 (en) | 2017-05-31 |
| CN103339366A (en) | 2013-10-02 |
| WO2012104000A1 (en) | 2012-08-09 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20201230 |