CN101529084B - Screw connection for fuel injector - Google Patents

Screw connection for fuel injector Download PDF

Info

Publication number
CN101529084B
CN101529084B CN2007800390091A CN200780039009A CN101529084B CN 101529084 B CN101529084 B CN 101529084B CN 2007800390091 A CN2007800390091 A CN 2007800390091A CN 200780039009 A CN200780039009 A CN 200780039009A CN 101529084 B CN101529084 B CN 101529084B
Authority
CN
China
Prior art keywords
clamping element
fuel injector
nozzle clamping
nozzle
spherical shaped
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
Application number
CN2007800390091A
Other languages
Chinese (zh)
Other versions
CN101529084A (en
Inventor
D·乌尔曼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN101529084A publication Critical patent/CN101529084A/en
Application granted granted Critical
Publication of CN101529084B publication Critical patent/CN101529084B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • 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
    • F02M2547/001—Control chambers formed by movable sleeves
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves

Abstract

The invention relates to a fuel injector (10) for injecting fuel into the combustion chamber of an internal combustion engine, having a holding body (14) and at least one nozzle body (22), wherein the nozzle body (22) is fastened to the holding body (14) of the fuel injector (10) under preload by means of a nozzle clamping element (16), characterized in that the nozzle clamping element (16) is connected to the holding body (14) by means of a latching connection (46, 56).

Description

The screw connection that is used for fuel injector
Background technique
DE 196 50 865 A1 relate to and are used for the solenoid valve of control example as the control room fuel pressure of the injection valve of the ejecting system of common rail high pressure accumulator.Linear reciprocating motion by the fuel pressure controllable valve piston in the control room opens or closes the spray-hole of injection valve by this valve piston.This solenoid valve comprises an electromagnet, movable armature and move and close the valve element that spring loads by valve on closing direction with armature, the valve seat mating reaction of this valve element and solenoid valve and control fuel and spray from the control room.
Realizing being threaded by a locking nut in the employed fuel injector so far, this nozzle body that makes fuel injector that is threaded, a throttling dish and a valve disc that is bearing on the nozzle body are connected with the maintenance body of fuel injector.In the case, this fuel injector is to operate by piezo actuator or by solenoid valve to have less important meaning for the time being.Usually use the seal ring of preferably making, so that the area of low pressure that reaches fuel injector is to outside seal by PTFE.For the nozzle clamp jack panel and maintenance body that connect common fanging noz(zle) body, throttling dish and valve disc, structure has screw thread on the inner face of nozzle clamp jack panel.Can reach by keeping body and nozzle body and being arranged on pretightening force in the assembly that parts wherein form by this screw thread.Be bothersome and expensive on the one hand, can cause undesirable leakage at the screw thread place in addition and the effect of the uneven distribution of the pretightening force that causes in the screw thread connecting part, importing by the screwed torque making screw thread on the inner face of nozzle clamp jack panel and keeping on the other hand making screw thread on the outer peripheral surface of body.
Summary of the invention
The present invention proposes, a kind of black box that need not keep the screw thread of body and nozzle clamp jack panel is provided, the geometric configuration of the sealing assembly by fixed unit can be realized higher compressive load per unit area and a kind of black box is provided, in the sealing assembly, the radially locking of the seal element by being configured to sleeve shape has prevented to open unintentionally.
One of fuel injector keep between body and some parts that a nozzle body to this fuel injector sets proposed, by being connected of locking element that is configured to sleeve shape having its advantage, can be implemented in the black box-for example the nozzle body in inserting the locking element that is configured to sleeve shape, is put the throttling dish and that leans against on this nozzle body and put between the valve disc that leans against on the throttling dish-higher compressive load per unit area on the sealing surface of generation.Can cancel the screw thread on the described inner face under the situation of using the locking element that is configured to sleeve shape that proposes according to the present invention and keep outside thread on the body.The ground that replaces only needs a locking-and fitting recess and keeping on the body corresponding with it locking slot being set is being set on the locking element of sleeve shape.The locking element of sleeve shape and keep the locking between the body to realize by a plurality of locking sections is configured in to these locking section ligulate formulas in the end regions of locking element of sleeve shape.Can get rid of plasticizing process and slump process when the high axial force by the cancellation screw thread.In addition by simple kayser locking can realize keeping between body and the locking element that is configured to sleeve shape be connected close fast, this make bothersome screw-down torque as common so far determine become equally unnecessary.
That geometrical construction-this geometrical construction by locking element preferably shows as is that some separate each other, the locking tongue of constructing in a circumferential direction of distributing-can produce definite locking power.Height difference between the supporting surface that the size of the axial force that applies in black box depends on nozzle body and the supporting surface of locking tongue and combine the intensity of elastic region.Can cancel the location of the circumferential position of the nozzle clamp jack panel that uses so far in addition by the locking element that is configured to sleeve shape that proposes according to the present invention, this produces favorable influence to installation time.
Also can be opened again to some parts of this nozzle body and the connection that keeps producing between the body in the nozzle body and the configuration of fuel injector by the locking element that proposes according to the present invention.
Because cancellation is threaded and has avoided the relative movement on the circumferencial direction also just to eliminate the danger that fixing pin is cut off, it is necessary that this fixing pin is installed accurately for the position of valve disc and throttling dish in case of necessity.If the position is mutually positioning exactly for valve disc and throttling dish on the contrary, then can fully phase out the use of fixing pin.
Be threaded by cancellation in addition and use according to the present invention the no longer wrench face on this locking element of needs of the locking element that is configured to sleeve shape that proposes, this simplifies manufacturing widely.Another is favourable, be by using the accessible effect of scheme that proposes according to the present invention: can cancel the employed so far PTFE seal ring that is used for high-pressure area and the area of low pressure of sealed fuel sparger, at this moment the locking element of low pressure seal by being configured to sleeve shape realizes at least two locational simply spherical shaped structures.
The geometrical construction of the locking element by especially being configured to the locking tongue can be realized than being threaded higher compressive load per unit area and can realizing than the higher pretightening force that is threaded thus.Can cancel at nozzle clamp jack panel and the wrench face that keeps the fine thread in the zone that is threaded on the body and be used to place the hexagon wrench.Installation process on the direction that simple kayser connects is simplified, and makes and can cancel the method for screwing and the monitoring thereof that moment of torsion is controlled or corner is controlled.Because when the fuel injector that assembling proposes according to the present invention, do not reverse or screw, can prevent to make cutting off of the mutually positioning fixing pin of valve disc and throttling dish.But if assembling during fuel injector valve disc and throttling dish locate exactly the position each other, it is unnecessary that fixing pin is become.The injector assembly of having assembled can come release by assistant tool simply, and wherein, the circumferential position of nozzle clamp jack panel location no longer is necessary.The special configuration (referring to the possible form of implementation according to the extension region of Fig. 4) that is configured to extension region by the area E that makes the nozzle clamping element then can be regulated definite axial force as the pretightening force of black box by the geometrical construction of this regional rigidity and nozzle clamping element.The geometric configuration of the nozzle clamping element by having at least two spherical shaped structures can make the low pressure seal elements combination in the nozzle clamping element, make can cancel employed so far, preferably manufacture the seal ring that is used for low pressure seal of PTFE.
Description of drawings
Below describe the present invention in detail by accompanying drawing.
Accompanying drawing is represented:
Fig. 1: according to the summary view of the critical piece of a fuel injector of prior art,
Fig. 2: a sectional view of the nozzle clamp jack panel of Shi Yonging so far,
Fig. 3: the view of the nozzle clamping element that proposes according to the present invention of fuel injector,
Details A: the locking element in the lock position,
Details B: be arranged on plan view according to the lock segments on the nozzle clamping element of Fig. 3,
Details C: the implementation detail between these lock segments,
Detail D: the details of the fitting recess nozzle clamping element, that have assembly tool,
Fig. 4: according to the unfolded drawing of the extension region on the nozzle clamping element of view among Fig. 3,
Fig. 5: the side view of the extension region that the is provided with dead slot nozzle clamping element, that represent with expansion mode among Fig. 4,
Fig. 6 .1: the lock segments before buckling into lock groove,
Fig. 6 .2: be locked at the lock segments in the lock groove,
Fig. 6 .3: be used for reaching from keeping the extracting tool of body dismounting nozzle clamping element
Fig. 7: the view of the fuel injector that proposes according to the present invention, have be installed in keep on the body according to nozzle clamping element of the present invention.
Embodiment
Can see by view: in head zone, have a plug 12 by the known fuel injector 10 of prior art according to Fig. 1.Fuel injector 10 according to the view of Fig. 1 comprises the nozzle clamp jack panel 16 that keeps body 14 and be provided with internal thread in addition.By this nozzle clamp jack panel valve disc 18 and throttling dish and nozzle body 22 are clamped in the scope of the part 24 that is threaded hermetically alternately, make fuel injector 10 constitute a compact structure unit.Can be found out by the part that the amplification shown in Fig. 1 of fuel injector 10 is represented: nozzle clamp jack panel 16 face within it comprises fine thread 40, this fine thread and relative configurations screw-thread fit effect and the formation part 24 that is threaded on the outer peripheral surface that keeps body 14.In the lower area of nozzle clamp jack panel 16, this nozzle clamp jack panel comprises that at least one is used to place the wrench face 26 of the instrument that applies torque.
Pass maintenance body 14 and extending a high pressure input part 30, this high pressure input part passes valve disc 18 and Rectifier plate 20 ground extend.Make the end face that keeps body 14, valve disc 18, throttling dish 20 rest on the end face of nozzle body 22 and constitute a screw thread composite structure by nozzle clamp jack panel 16.
Constitute control rooms 32 by control sleeve 34 in the nozzle body 22 of fuel injector 10, this control sleeve is pressed on Rectifier plate 20 following by a spring 36.Spring 36 surrounds an injection valve member 38 that preferably constitutes needle-like, and its medi-spring 36 is supported on the ring of injected valve element 38 receptions.Nozzle clamp jack panel 16 spins with the maintenance body 14 of fuel injector 10 mutually by fine thread 40.
By a cross section can seeing the nozzle clamp jack panel according to the view of Fig. 2.As seen from Figure 2, has the wrench face 26 that at least one is used to place the instrument that applies torque having on the inboard of nozzle clamp jack panel 16 shown in this perspective cross-sectional view on fine thread 40 and the excircle in base regions in head zone.Nozzle clamp jack panel 16 shown in Fig. 2 comprises one first diameter D I, 1, one second inside diameter D I, 2And one the 3rd inside diameter D I, 3Can find out that by perspective cross-sectional view nozzle clamp jack panel 16 respectively has different wall thickness S in the zone of described diameter in addition according to the nozzle clamp jack panel 16 of Fig. 2 1, S 2And S 3, wall thickness S wherein 1, S 2And S 3Direction towards at least one wrench face 26 increases downwards.
By a longitudinal section can seeing the nozzle clamping element that proposes according to the present invention according to the view of Fig. 3.By sectional view and affiliated details A according to Fig. 3, B, C and D can find out: nozzle clamping element 16 comprises a fixed area 42 that indicates by reference number 42 in its head zone.In fixed area 42, a plurality of locking tongues 44 from Vertical direction along the circumferential extension of the nozzle clamping element 16 that proposes according to the present invention.Each locking tongue 44 is on the inner face, promptly comprising a projection 46 on the face of the excircle that keeps body 14, this projection is preferred to be constituted hook-shapedly.For these locking tongues of plasticity that produce radially are separated from each other by gap 48.Gap 48 in the fixed area 42 of nozzle clamping element 16 between each locking tongue 44 is indicated in the details " C " with the dimension scale of amplifying.
On the inner peripheral surface of nozzle clamping element 16, constructing the first spherical shaped structure 50 under the fixed area that marks by label 42.This spherical shaped structure is positioned at an intra-zone of nozzle clamping element 16, and this nozzle clamping element has first inside diameter D in this zone I, 1(contrast is according to the view of Fig. 2).According to the wall of the nozzle clamping element 16 of view among Fig. 3 from first inside diameter D I, 1To second inside diameter D I, 2Transition region on the excircle of nozzle clamping element 16, constructed fitting recess 58 and on inner peripheral surface, constructed the second spherical shaped structure 52.The details of fitting recess 58 can be found out from detailed drawing " D ".Under second of the nozzle clamping element 16 spherical shaped structure, has a zone, be provided with some dead slots 66 circlewise with perforation arrangement pattern 62 in this zone, these dead slots have the exterior contour of similar horizontal 8 words in the embodiment of the nozzle clamping element that summary is represented in Fig. 3.
Under the zone that is provided with perforation arrangement pattern 62, extending a supporting surface 54, in assembled state at the shoulder of this supporting surface upper support nozzle body 22 (contrast is according to the view of Fig. 7).
" A " can find out by details, and the c of superelevation portion and being coupled to that the projection 46 of locking tongue 44 is configured to the inner face of relative locking tongue 44 is arranged in the lock groove 56 on the excircle that keeps body 14.Represent the tilt angle with α, projection 46 extends in locking tongue 44 with this tilt angle.The thickness of the elastic region of locking tongue 44 is selected with such size, and this size surpasses the c of superelevation portion.
" B " can find out by detailed drawing, is provided with a plurality of locking tongues 44 mutually abreast along the circumference of the head zone of the nozzle clamping element 16 shown in Fig. 3 on this circumferencial direction.Referring to details " C ", the locking tongue 44 that each locking tongue 44 is adjacent with each separates by gap 48.Preferably construct a projection 46 on the inner face of each of the locking tongue 44 in the fixed area 42 that is configured in nozzle clamping element 16, this projection is coupled in the lock groove 56 of constructing on the circumference that keeps body 14.
" D " can find out by details, can lock an assembly tool 60 on the excircle of nozzle clamping element 16 in the fitting recess shown in Fig. 3 58.This assembly tool 60 is inserted in the fitting recess 58 on the excircle of nozzle clamping element 16 and is locked in this fitting recess from below.Represent the degree of depth of fitting recess with e, constructed the bottom of fitting recess 58 with respect to the outer peripheral surface of nozzle clamping element 16 with this degree of depth.The second spherical shaped structure is positioned at the inner peripheral surface opposite of nozzle clamping element in the zone of fitting recess 58.
At Fig. 3 and affiliated detailed drawing A thereof, B, nozzle clamping element 16 keeps body 14 by locking by locking tongue 44 in fixed area 42 in the end thereon relatively among C and the D.For this reason assembling during injector assembly with nozzle clamping element 16 by the following correct position ground injector part of location mutually that moves on to: nozzle body 22, throttling dish 20 is on valve disc 18 and the maintenance body 14.The coordination on geometrical construction of the phase relative to each other of each parts has guaranteed: set up pretightening force in the lockup state of the lock groove 56 on locking tongue 44 in fixed area 42 and the maintenance body 14.The big I of this pretightening force is regulated with high process reliability by the geometrical construction of each parts and by the rigidity of perforation arrangement pattern zone 62 (extension region) inner nozzle clamping element 16.
Can see by view according to Fig. 4: how can by in the nozzle clamping element 16 targetedly the hole make the rigidity degree be reduced to required degree.
Can find out by view, be illustrated from 0 ° to 360 ° corresponding to developed surface 64 in a circumferential direction with launching in zone shown in Fig. 3, that constructed perforation arrangement pattern 62 therein according to Fig. 4.In expansion view according to Fig. 4, each dead slot 66 dislocation each other in a circumferential direction in the perforation arrangement pattern zone 62.Each dead slot 66 in dead slot 66 relative fronts is set up with distance 68.The length of each dead slot is by label 70 expressions, and the size of dead slot 66, shape, length and number are determined according to required rigidity amount of attenuation in the circumferential area that is provided with perforation arrangement pattern 62 of spraying nozzle clamping element 16.Can be found out by the view according to Fig. 5: wall thickness regions nozzle clamping element 16, that represent with developed surface 64 in Fig. 4 can be constructed with the material thickness 72 that reduces.If on nozzle clamping element 16, construct zone 72 as illustrated in fig. 5 with the material thickness that reduces, then can cancel the dead slot 68 shown in Fig. 4 and Fig. 3, because only reduce portion 72 by cross section in the nozzle clamping element 16, the principle ground that is similar to swell fixture can reach required rigidity decrease.
By Fig. 6 .1,6.2 and 6.3 figure preface can find out that the nozzle clamping element is in the installation and the dismounting that keep on the body.
Can find out by view: when nozzle clamping element 16 is installed, this nozzle clamping element upwards is enclosed within on the maintenance body 14 according to Fig. 6 .1.Because be arranged on the elastic characteristic of the locking tongue 44 in the fixed area 42 of nozzle clamping element 16, these locking tongues are easy to strut, make projection 46 as shown in Fig. 6 .1, be easy to by to external pressure.
If nozzle clamping element 16-as shown in Fig. 6 .2-to reach its mounting point be the lock position, the respective bump 46 that then is configured on the inner face of locking tongue 44 of nozzle clamping element 16 buckles in the lock groove 56.In addition, the first spherical shaped structure 50 that is configured on nozzle clamping element 16 inner faces shown in Fig. 3 extends on the circumference that keeps body 14.The diameter of the first spherical shaped structure 50 is coordinated by interference each other like this with the diameter that keeps body 4, makes their constitute the first wiper seal portion of injector assembly, thereby can cancel additional seal ring.
Their projection of locking tongue 44 usefulness 46 lock lock groove 56 tight before extension unit 16 contact with nozzle body 22 formation because supporting surface 54 touches the end face of nozzle body 22.In that nozzle clamping element 16 is further moved forward when locking tongue 44 is locked in this lock groove towards lock groove 56, apply pretightening force by the assembly tool on the fitting recess 58 60, the elasticity that is used for extension region 62 (the perforation arrangement pattern is referring to Fig. 3 and 4) extends.After reaching lock groove 56, these locking tongues 44 flexibly bounce back into their home position (referring to the view according to Fig. 6 .2), lock in the lock groove 56 and make the injector assembly locking.Can take assembly tool 60 away then.The elastic reset power of the extension region 62,72 of nozzle clamping element 16 applies these injector parts required pretightening force relative to each other constantly.
Because each parts that fuel injector 10 do not take place during assembling process reversing to each other, then can cancel and be used for the fixing pin that anti-each parts reverse toward each other.And also can cancel the wrench face 26 (referring to view) on the excircle of the tight element 16 of nozzle clamp according to Fig. 2.
Fig. 6 .3 represents how to make locking tongue 44 by lifting in the lock groove 56 that keeps on the body 14 by an extracting tool 74 when needing to dismantle injector assembly in case of necessity.After projection 46 is shifted out in by the lock groove 56 on the circumference that keeps body 14, can be with nozzle clamping element 16 down pulling out on the maintenance body 14 by fuel injector 10 on the pull-out direction 76, as shown in Fig. 6 .3.
Can find out by view at last where the nozzle clamping element that proposes according to the present invention is as being set in the injector assembly in assembled state according to Fig. 7.
In the nozzle clamping element 16 shown in Fig. 7 was keeping installment state on the body 14, their the corresponding projectioies 46 of locking tongue 44 usefulness that the gap separates each other of passing through that are configured in the fixed area 42 placed lock groove 56.Lock groove 56 extends on the excircle that keeps body 14.The first spherical shaped structure 50 is positioned in vertical direction on the underpart of the locking tongue 44 that extends, and this first spherical shaped structure plays the effect of low pressure seal and by touching on the circumference of maintenance body 14.In addition, nozzle clamping element 16 surrounds valve disc 18 and throttling dish 20 and nozzle body 22.Can see by view that in addition nozzle body 22 is fixed on by nozzle clamping element 16 on the supporting surface 54 of this nozzle clamping element and is pressed on throttling dish 20 following with its end face of carrying the combustion chamber side end according to Fig. 7.According to the view of Fig. 7, the second spherical shaped structure 52 rests on the circumferential surface 78 of nozzle body 22, and this second spherical shaped structure relatively is built in the wall of nozzle clamping element 16.Under the second spherical shaped structure 52 on the inner face that is being configured in nozzle clamping element 16 under the fitting recess 58 in other words, extending zone 72 or extending such zone, the perforation arrangement pattern 62 that in this zone, is distributing and forming by in conjunction with Fig. 3 and 4 dead slots of describing 66 with the material thickness that reduces.
In the assembled state 80 of the nozzle clamping element 16 shown in Fig. 7, this nozzle clamping element has the only extension region 72 or 62 represented of summary, this extension region or can construct, perhaps the perforation arrangement pattern 62 that in this extension region, is distributing and forming by dead slot 66 with the material thickness that reduces.

Claims (10)

1. be used for injecting fuel into the fuel injector (10) of the firing chamber of internal-combustion engine, have one and keep body (14) and at least one nozzle body (22), wherein, this nozzle body (22) is fixed on the maintenance body (14) of this fuel injector (10) under preloading by a nozzle clamping element (16), it is characterized in that: this nozzle clamping element (16) is connected (46,56) with this maintenance body (14) by locking and is connected.
2. fuel injector according to claim 1 is characterized in that: described nozzle clamping element (16) has a fixed area (42), has constructed a plurality of locking tongues (44) in this fixed area, and these locking tongues are separated by gap (48) each other.
3. fuel injector according to claim 2 (10) is characterized in that: constructed projection (46) on the inherent locking tongue of fixed area (42) (44) of described nozzle clamping element (16).
4. fuel injector according to claim 2 (10) is characterized in that: described nozzle clamping element (16) has at least one spherical shaped structure (50,52) on an inner peripheral surface under described fixed area (42).
5. fuel injector according to claim 1 (10), it is characterized in that: described nozzle clamping element (16) has two spherical shaped structures (50 on the circumferential surface within it, 52), these spherical shaped structures are gone up at least one sealing surface of formation at described maintenance body (14) in the assembled state (80) of described nozzle clamping element (16).
6. fuel injector according to claim 5 (10), it is characterized in that: in order to produce radial preload, it is processed that the second spherical shaped structure (52) in the first spherical shaped structure (50) in described two spherical shaped structures and described two the spherical shaped structures leaves machining allowance ground with respect to the outer peripheral surface of described maintenance body (14).
7. fuel injector according to claim 1 (10) is characterized in that: described nozzle clamping element (16) has the circumferential sectors (62,72) of the axial rigidity that can set with being determined.
8. fuel injector according to claim 7 (10) is characterized in that: constructed the perforation arrangement pattern (62) that a dead slot (66) that is provided with by some annular spread ground constitutes in described zone with the axial rigidity that can set with being determined.
9. fuel injector according to claim 7 (10) is characterized in that: in the zone with the axial rigidity that can set of described nozzle clamping element (16), this nozzle clamping element (16) constitutes with the material thickness (72) that reduces with being determined.
10. fuel injector according to claim 5 (10), it is characterized in that: be locked in the lock groove (56) with locking tongue (44) in the state (80) of described nozzle clamping element (16) on being installed in described maintenance body (14), described nozzle clamping element (16) with a supporting surface (54) to described nozzle body (22) towards described maintenance body (14) preload, the first spherical described relatively maintenance body of shaped structure (50) (14) in described two spherical shaped structures constitutes first sealing configuration, and the second spherical shaped structure (52) in described two spherical shaped structures is gone up at the circumference (78) of described nozzle body (22) and constituted secondary sealing area.
CN2007800390091A 2006-10-20 2007-08-20 Screw connection for fuel injector Expired - Fee Related CN101529084B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006049532.2 2006-10-20
DE102006049532A DE102006049532A1 (en) 2006-10-20 2006-10-20 Screw connection for fuel injector
PCT/EP2007/058598 WO2008046680A1 (en) 2006-10-20 2007-08-20 Screw connection for fuel injector

Publications (2)

Publication Number Publication Date
CN101529084A CN101529084A (en) 2009-09-09
CN101529084B true CN101529084B (en) 2011-08-24

Family

ID=38722903

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007800390091A Expired - Fee Related CN101529084B (en) 2006-10-20 2007-08-20 Screw connection for fuel injector

Country Status (5)

Country Link
EP (1) EP2084393B1 (en)
CN (1) CN101529084B (en)
AT (1) ATE455956T1 (en)
DE (2) DE102006049532A1 (en)
WO (1) WO2008046680A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011086005A1 (en) * 2011-11-09 2013-05-16 Robert Bosch Gmbh Fuel injector, method for mounting a fuel injector and clamping device for mounting a fuel injector
DE102012217991A1 (en) * 2012-10-02 2014-04-03 Continental Automotive Gmbh Nozzle assembly for a fluid injector and fluid injector
DE102013018177B4 (en) * 2013-11-29 2016-01-28 L'orange Gmbh Fuel injector module and fuel injector and test arrangement with it
DE102018217768A1 (en) * 2018-10-17 2020-04-23 Robert Bosch Gmbh Injector arrangement
WO2020214140A1 (en) * 2019-04-15 2020-10-22 Cummins Inc. Fuel injector with radially orientable nozzle holes using splines
DE102020113609A1 (en) 2020-03-31 2021-09-30 Liebherr-Components Deggendorf Gmbh Fuel injector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2024315A (en) * 1978-07-01 1980-01-09 Lucas Industries Ltd Fuel injection nozzle
WO2003031805A1 (en) * 2001-10-04 2003-04-17 Siemens Aktiengesellschaft Injector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5724946A (en) * 1996-11-22 1998-03-10 Siemens Automotive Corporation Fuel rail and injector assembly
US5735555A (en) * 1996-12-18 1998-04-07 Siemens Automotive Corporation Fuel rail to fuel tube end compact connector
US6511004B2 (en) * 2000-01-19 2003-01-28 Delphi Technologies, Inc. Fuel injector cover
US6676044B2 (en) * 2000-04-07 2004-01-13 Siemens Automotive Corporation Modular fuel injector and method of assembling the modular fuel injector
DE10103933A1 (en) * 2001-01-30 2002-08-14 Bosch Gmbh Robert Fuel injector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2024315A (en) * 1978-07-01 1980-01-09 Lucas Industries Ltd Fuel injection nozzle
WO2003031805A1 (en) * 2001-10-04 2003-04-17 Siemens Aktiengesellschaft Injector

Also Published As

Publication number Publication date
DE102006049532A1 (en) 2008-04-24
ATE455956T1 (en) 2010-02-15
DE502007002705D1 (en) 2010-03-11
EP2084393B1 (en) 2010-01-20
WO2008046680A1 (en) 2008-04-24
CN101529084A (en) 2009-09-09
EP2084393A1 (en) 2009-08-05

Similar Documents

Publication Publication Date Title
CN101529084B (en) Screw connection for fuel injector
CN101578445B (en) Injector for injecting fuel into combustion chambers of internal combustion engines
US20150013644A1 (en) Decoupling element for a fuel injection device
US10539105B2 (en) Fuel injector and fuel injector assembly
CN105980695B (en) Valve for metering a fluid under high pressure
CN101793216B (en) Pressure actuated fuel injector
JP2006037960A (en) Fuel injection system
EP3449117B1 (en) High pressure diesel pump
CN101624952B (en) Fuel injection device
US7066410B2 (en) Common rail injector
CN101925734B (en) Fuel injector
US6254103B1 (en) Seal
US5246165A (en) Perfected high pressure sealing system for the control valve of an electromagnetic internal combustion engine fuel injector
WO2016096200A1 (en) Decoupling element for a fuel injection device
US7255289B2 (en) Fuel injector for an internal-combustion engine
CN102472210B (en) Valve arrangement
CN104769270A (en) Fuel injector
KR101979087B1 (en) Valve assembly for an injection valve and injection valve
JP2005504226A (en) Valves, especially fuel injection valves
US9677679B2 (en) Valve with force generating element
EP3058213B1 (en) Fuel injector and fuel-injection system
CN101910607A (en) Fuel injection valve
CN102251894A (en) Fuel injector with hydraulic coupling unit
JP2004517288A (en) Hydraulic accumulators, especially bladder type accumulators
CN203906156U (en) Valve component for fuel injector and fuel injector

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into 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

Granted publication date: 20110824

Termination date: 20150820

EXPY Termination of patent right or utility model