CN101622439B

CN101622439B - Magnetic head for solenoid valve

Info

Publication number: CN101622439B
Application number: CN2008800068187A
Authority: CN
Inventors: W·弗莱纳; V·拉奥
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2007-03-01
Filing date: 2008-01-23
Publication date: 2012-01-11
Anticipated expiration: 2028-01-23
Also published as: DE102007009963A1; WO2008104424A1; EP2132432B1; EP2132432A1; CN101622439A

Abstract

The invention relates to a fuel injector comprising a solenoid valve. The solenoid valve comprises a magnetic head (10) and a sleeve body (16), in which a solenoid core (26) and a solenoid coil (28) are accommodated. The solenoid coil (28) is electrically connected via connector pins (42). A rotatably disposed cover cap (14) is placed on the sleeve body (16), wherein heads for the connector pins (42) are formed in the contacts (44). The cover cap (14) is preferably clipped onto the magnetic head.

Description

The Electrical heads that is used for solenoid valve

Background technique

DE 196 501 586 A1 relate to the solenoid valve of fuel pressure in the control room of an injection valve that is used for controlling common-rail injection system.To-and-fro motion through the fuel pressure in the control room is come the control valve piston can make the spray-hole of injection valve open or close by this valve piston.Solenoid valve comprises an electromagnet, and movable armature and one are that move with armature and close the valve element that spring loads by valve on closing direction, the valve seat mating reaction of this valve element and solenoid valve and control the fuel stream from the control room thus.

On known solenoid valve, very unfavorable effect is played in the armature that occurs at work and/or the resilience of valve element.Make armature card be in a uncertain position through the vibration again of bumping the armature card on valve seat.The difference that when injection subsequently, will cause solenoid valve thus under the situation in identical control is opened the time and is caused the dispersion of beginning of injection and emitted dose thus.Armature according to being reached by the known scheme solenoid valve of DE 197 98 104 A1 by DE 196 50 586 A1 is configured to the armature of two-piece type, reaches the kinetic energy that reduces to cause resilience thus so that reduce the moving-mass of armature-valve cell.

In at current high-pressure injection system, like the employed solenoid valve of high pressure accumulator ejecting system (Common Rail), on injector body, fix a magnetic head in this wise, made electromagnet be supported on indirectly or directly on the shoulder in the injector body.Also maybe a housing be pressed on this shoulder, this housing shape is surrounded electromagnet sealedly.Its fixing common electricity consumption magnetic catch jack panel realizes, this turnbuckle is from top encirclement electromagnet or around the sleeve of electromagnet and be spun on the outside thread that is positioned on the injector body.Structure has the valve piece of the valve seat of solenoid valve to be crushed on second shoulder in injector body inside by second screwed assembly above that.By system pressure, the pressure level that promptly has in the high pressure reservoir chambers (rail altogether) loads the valve piece from following at work.As its result, the valve piece upwards moves a few approximately μ m in its screwed assembly, thus, the axial position of the relative injector body of valve seat according to system pressure, be that the pressure that has in the high pressure reservoir chambers (common rail) changes.

If the last backstop of solenoid valve also is positioned at the screwed assembly that is used for fixing the valve piece, then no matter be that valve seat or up stroke backstop all move up and the surplus air gap and the system pressure that cause formerly regulating descend bothersomely relatively under system pressure.In order under maximum system pressure, also to keep minimum surplus air gap,, it will keep the part that reduces when regulating in advance with the surplus air gap of pressure correlation.But this preparatory reservation causes the actual electromagnetic force that provides not to be utilized fully again.If the last backstop of solenoid valve is positioned at first screwed assembly that is used for magnetic head, then, will cause the Valve travel decline relevant with system pressure because valve seat moves.This is disadvantageous especially, is kept in advance and thus for stable required, as far as possible little Valve travel no longer existence under medium and little pressure of switching characteristic because the amount of movement of valve seat is essential when valve travel adjustment.

Electromagnetic valve component is that the structure of the solenoid valve in the fuel injector is similar in most of forms of implementation.One by the electromagnet sleeve socket joint of turning receipts electromagnetic coil, magnetic core and a discharge tube joint of processing the turning parts usually.Hydraulic seal on the inboard realizes by one or more O RunddichtringOs.This assembly is crimped and then is used for the installation of the plug connector that electromagnetic coil electrically contacts and the welding of pin after part is mounted.Carry out the injection moulding of sealing of resulting preparatory assembled components at last, so that the moulding of plug connector geometrical construction and magnetic head exterior geometry.In order to cover multiple plug scheme and to obtain the difference output angle of plug, will preset a plurality of injection moulding tools of sealing, their allow to realize the different forms of implementation of last plastic encapsulation injection moulding.Usually when plug is assembled, screw on preceding or carry out the radial directed of plug connector when screwing on by a device at the electromagnet turnbuckle.But this structure of electromagnet assembly has high relatively manufacture cost.No longer possibly make an electromagnetic valve component of assembling by error take apart through crimping and plastic encapsulation injection moulding, so that occurrence of waste.To be classified as be very crucial to the crimping process in some forms of implementation of fuel injector, because this crimping process possibly have very adverse influence to the stroke skew of armature.

Summary of the invention

According to the present invention, propose a kind of magnetic head that is used for electromagnetic valve component, but its modular type ground constitutes and has a header contact of a clamping.The radial directed of plug Outlet can infinitely be conditioned in big scope.Plug holder can be selected, so that realize the different bent angle Outlet of different type of plug and header contact.But can fully cancel the modular organization of the magnetic head of the plug through having the clamping operation of crimping, the welding through the plug pin realize the injection moulding of sealing of connection that material is sealed and plug.Can reach significant cost and descend through cancelling these work or installation steps, wherein keep the function of magnetic head of such formation of electromagnetic valve component.And the scheme through proposing according to the present invention can reach: cancellation electromagnet turnbuckle.In a form of implementation as the design on basis of the present invention, the magnetic head housing is made into the steel part of jar shape deep drawn, heat or cold forming, and it comprises a reflow pipe on its configuration.The parts of this jar shape comprise that hexgonal structure and two of an outside thread, a favourable dismounting are used to pass the opening of plug pin and comprise a groove that is used to keep the turning of locking of pressing from both sides at last.In addition, structure has a reflow pipe on the parts of jar shape.In when assembling, at first electromagnetic coil is pushed in the magnetic core and is maintained in this magnetic core by the plastics keying structure of two injection mouldings.The lead of a prolongation is sealed the injection moulding part can guarantee centering or the insulation of said pin to housing.The support of magnetic core or through inserting a spacer sleeve, or through bonding or insert a collar and realize.Rubber sealing device or rubber plate or analog make magnetic core or the relative injector body insulation of electromagnetic coil and bear the sealing of plug pin to the outside.

The plug holder that can be held is preferably processed injection molding spare and is surrounded the long strip type plug connector of inserting.This long strip type plug connector has the application purpose of looking and fixed grafting geometrical construction on a side, this long strip type plug connector is configured to elastic element on opposite side.Thus when being held of plug holder correct position, this elastic element kayser on the plug pin and with lasting being connected of this plug pin formation, under the situation of this connection, can guarantee intrinsic preloading all the time.

When mounted, carry out magnetic head spinning or installing on the injector body of assembling and outfit in advance.Magnetic head for example can be received in one by formation hexgonal structure above that and screw on the device.After having carried out being connected between magnetic head and the injector body, can carry out the test of high pressure sealing test and low pressure seal and carry out flux test through dismountable installation accessories.Look the structural form of implementation that magnetic core supports and decide in injector body, this magnetic core can fully be removed, and this can carry out after humidity test, so that head stack can not become waste product.In high pressure sealing test back and before, the upper-part of plug in the end is installed, in the installation steps to avoid waste product by laser lithography.In order to ensure electrically contacting of plug pin/elastic element, can carry out simple electric current or resistance test.To this also convertiblely, at first intactly assemble head stack, and carry out humidity test with this form then.

Description of drawings

Below will describe the present invention in detail by accompanying drawing.

Accompanying drawing is represented:

Fig. 1: a sectional view of the Electrical heads that proposes according to the present invention of valve assembly,

Fig. 2: receive the external view of the sleeve body of electromagnetic valve component,

Fig. 3 .1 to 3.3: the different forms of implementation that magnetic core is fixed in sleeve body,

Fig. 4: be received in an implementation of the contact of the electromagnetic coil in the magnetic core,

Fig. 5 .1 and 5.2: one are arranged on the view of the seal disc between the sleeve body of housing and magnetic head,

Fig. 6: fixing the view in the zone of the seal disc between sleeve body and the housing within it,

Fig. 7: a zoomed-in view of plug pin field,

Fig. 8: the plan view of inserting terminal,

Fig. 9 .1 and 9.2: at the head of plug pin and according to the form of implementation that electrically contacts in the housing between the semicircle contact of the view of Fig. 8, and

Figure 10 .1 and 10.2 a: plan view and a side view of the housing of magnetic head.

The practical implementation form

Cross section by the magnetic head that proposes according to the present invention that can see a valve assembly according to the view of Fig. 1.

Fig. 1 representes a magnetic head 10, and its quilt cover 14 covers.Magnetic head 10 comprises the top of sleeve body 16, and these sleeve body 16 relative axis 12 constitute symmetrically.Sleeve body 16 has an outer side surface 18 and an inner side surface 20 and is configured to cylindrical basically.Integrated exhaust port 22 in housing 14, the low voltage side that fuel flow back into fuel injection system through this exhaust port by the fuel injector with magnetic head 10 refluxes in the part.

Between the upper side of the downside of housing 14 and sleeve body 16, has a seal disc 24.Sealing dish 24 have one be integrated in housing 14 in exhaust port 22 hole of aliging, go out through this orifice flow by the controlled quentity controlled variable of controlling out in the fuel injector.

Sleeve body 16 surrounds a magnetic core 26, in magnetic core itself, embeds an electromagnetic coil 28.This electromagnetic coil 28 is through forming contact in the contact device 44 of plug pin 42 in housing 14.For plug pin 42 electrically contacting on contact device 44, housing 14 has an inserting terminal 46.The radial directed of inserting terminal 46 allows in big scope, infinitely to regulate.Connect housing 14 on the upper side that is clamped in sleeve body 16 under the situation of seal disc 24 in the centre and can be used as and select assembly to make, so that realize different inserting terminal 46 and be implemented in the extension of different ground configuration on the angle orientation.

On the outer side surface 18 of sleeve body 16, have a dead slot 30 that for example is configured to circular groove, in this dead slot, snap in the hook 40 of the gripping bow 54 at least one hinge that hingedly is bearing in housing 14 38.As mode favourable on the processing technique, this dead slot 30 can manufacture the turning groove on the outer side surface 18 of sleeve body 16.

In addition, on the outer side surface 18 of sleeve body 16, have a seal arrangement receiving part 32, the seal ring that for example is made into O type circle can be inserted in the sealing device receiving part.The outer side surface 18 of sleeve body 16 has helical thread portion 36 in addition.

Can be found out by the view according to Fig. 1 in addition: an end face of the magnetic core 26 of magnetic head 10 is indicated with label 48.The electromagnetic coil 28 of being inserted in the magnetic core 26 aligns with this end face 48.The end face towards seal disc 24 of housing 14 is indicated with label 50.Between the dead slot 30 and seal arrangement receiving part 32 that for example are made to the turning groove on the outer side surface 18 of sleeve body 16, on sleeve body 16, constructed instrumental purpose place 52, but it for example is designed to the screw hair style hexagonal or similar shape.Opening 56 in the sleeve body 16 is used to make plug pin 42 to penetrate housing 14, to be used for electrically contacting by the electromagnetic coil 28 of magnetic core 26 encirclements.

Sleeve body 16 shown in Fig. 1 relates to steel part deep drawn, heat or cold forming, integrated therein exhaust port 22.The instrumental purpose place 52 that on sleeve body 16, have screw thread 36, has as above stated and two openings 56 that are used to pass plug pin 42.

Electromagnetic coil 28 is pushed in the magnetic core 26 and for example can be maintained in this magnetic core through the plastics keying structure of one or more injection mouldings.

Plug pin 42 is sealed injection moulding by one and is partly surrounded, and seals the injection moulding part through this, and the relative sleeve bodies 16 of plug pin 42 are insulated and on the other hand by in fixed on the one hand.Housing 14 is for example made as plastic injection piece and is comprised the long strip type plug connector that is embedded into.These long strip type plug connectors have the grafting geometrical construction and on opposite side, have elastic element on a side.Under the situation that housing 14 positions are clamped on the seal disc 24 definitely and housing 14 is fixed through at least one gripping bow 54, can be implemented in the lasting connection on the contact device 44 thus.Contact device 44 be configured to flexible element kayser on plug pin 42 and form lasting connection here, wherein remain an intrinsic prestressing force.

The sleeve body of representing with the cross section in Fig. 2 presentation graphs 1.

Can find out that by Fig. 2 dead slot 30 extends on the outer side surface 18 of sleeve body 16 continuously.Below groove 30, on the outer side surface of sleeve body 16, extending instrumental purpose place 52, next is exactly seal arrangement receiving part 32.Below seal arrangement receiving part 32, show the part of screw thread 36.

In Fig. 3 .1 to 3.3, can obtain the fixing form of implementation of magnetic core in sleeve body.

Fig. 3 .1 representes: according to this form of implementation, the magnetic core 26 that surrounds electromagnetic coil 28 is fixed on the inner side surface 20 of sleeve body 16 through adhesive layer 60.Adhesive layer 60 extends between the inner side surface 62 of top cover of upper-end surface and sleeve body 16 of magnetic core 26.In magnetic core 26, have cavity, in these cavitys, receive electromagnetic coil 28 on the one hand and receive plug pin 42 on the other hand.They are flushing with the end face 48 of magnetic core 26 in the installment state.

Except the mode of execution that passes through adhesive layer 60 fixed magnetic cores 26 shown in Fig. 3 .1, also can be shown in Fig. 3 .2, magnetic core 26 fixes by a retaining ring 64 that embeds in the groove 68 of inner side surface 20.The inner side surface 20 of retaining ring 64 relative sleeve bodies 16 have exceed the height 66.Relevant with the width of the degree of depth of groove 68 and retaining ring 64 exceed height 66 and can magnetic core 26 be clamped in the sleeve body 16 simply through this.With the form of implementation shown in Fig. 3 .1 similarly, in magnetic core 26, have the cavity that is used for plug pin 42 and the electromagnetic coil 28 that is used for being surrounded by magnetic core 26.Magnetic core 26 is made to reaching of relative axis 12 symmetries and puts on the inner side surface 64 of the top cover that leans against sleeve body 16 through retaining ring 64.

Fig. 3 .3 representes that magnetic core 26 supported sleeves 70 support.Stop sleeve 70 is configured to the parts of annular basically and comprises first ring surface 72 and second ring surface 74.When second ring surface 74 for example was supported on the injector body, first ring surface 72 of stop sleeve was supported on the end face 48 of magnetic core 26.Through stop sleeve 70 and through contacting between the end face 48 of first ring surface 72 and magnetic core 26, this magnetic core is put on the inner side surface 62 of the top cover that leans against sleeve body 16.

For Fig. 3 .1, what all forms of implementation shown in 3.2 and 3.3 all were suitable for is, magnetic core 26 relative axis 12 constitute symmetrically and have a cavity that is used to receive the plug pin 42 that electromagnetic coil 28 and reception and electromagnetic coil 28 electrically contact.

Fig. 4 representes the detailed drawing of the contact device of electromagnetic coil.

Can be seen that by Fig. 4 electromagnetic coil 28 is surrounded by magnetic core 26, the lower end surface of electromagnetic coil 28 flushes with the end face 48 of magnetic core 26.The plug pin 42 that electrically contacts with electromagnetic coil 28 is surrounded by an insulating sleeve 76.Insulating sleeve 76 surrounds plug pin 42 on one section axial length, the thickness that this axial length is equivalent to the material of sleeve body 16 adds that the pact of thickness of magnetic core 26 is half the.Plug pin 42 and the insulating sleeve 76 that surrounds them extend through the opening in the top cover of sleeve body 16 56 and pass the seal disc 24 on the upper side that is arranged on sleeve body 16.

Plug pin 42 has groove 78, thus when plug pin 42 contact in 44 last times of contact device, form the kaysers connections through housing 14.Groove 78 on the plug pin 42 produces contact reliably on the one hand and produces on the other hand by the confining force shown in the arrow 80, can prevent to be left its mounting point in sleeve body 16 by the electromagnetic coil 28 that magnetic core 26 surrounds by this confining force.In addition because recessed realization of side between electromagnetic coil 28 and the magnetic core 26: when 42 formation of plug pin electrically contacted, not only 1 kept electromagnetic coil 28, and the magnetic core 26 in the sleeve body 16 is remained on its mounting point.

Fig. 5 .1 and 5.2 expressions are arranged on the seal disc between the housing and sleeve body in the magnetic head.

View according to Fig. 5 .1 can be seen: seal disc 24 has a central opening 82, and this central opening aligns with the integrated exhaust port 22 of housing 14, referring to Fig. 1.In the material of seal disc 24, constructed the opening 84 with the corresponding number of number of plug pin 42, plug pin 42 passes these openings and extends.

Can see a sectional view of the seal disc of representing with plan view among Fig. 5 .1 by Fig. 5 .2.

Seal ring 24 relative axis 12 constitute symmetrically and one side forms external sealing between the top cover of housing 14 and sleeve body 16, and the sealing and this external plug pin 42 that form relative controlled quentity controlled variable on the other hand between the opening 56 in housing 14 and sleeve body 16 seal through forming on the exit position of the opening 56 in the sleeve body 16.Seal disc 24 is preferably processed by the material as Viton for example.

Fig. 6 representes the view in a zone, in this zone between sleeve body and housing the fixing seal dish.

Can find out by Fig. 6, on the end face 50 of the housing of preferably processing plastic injection piece 14, construct rib or toothing 86 or similar structure.This structure function on the fringe region of the seal disc 24 that constitutes plate-like and when housing 14 be installed to 24 last times of seal disc with the sealing dish diametrically to drop-down so that seal disc 24 abuts against on the top cover that constitutes columniform sleeve body 16 basically.After having realized the clamping of seal disc 24 through said rib or toothing 86 diametrically, housing 14 is fixed through the gripping bow shown in Fig. 1.

Therefore, the outer side surface 18 of sleeve body 16 is sealed in the top area that is configured to columniform sleeve body 16 basically.The inner side surface of sleeve body 16 is with label 20 indications.

Fig. 7 representes the zoomed-in view of the sealing of its relative external environment condition of plug pin field.

View by according to Fig. 7 can be seen: plug pin 42 is insulated sleeve 76 and surrounds, and wherein, electromagnetic coil 28 produces through this plug pin and electrically contacts.In form of implementation shown in Figure 7, insulating sleeve 76 is clamped between the zone 88 on the end face 50 of electromagnetic coil 28 and housing 12.The ring 88 that on the end face 50 of the housing that preferably is made into plastic injection piece 14, has the configuration of flange forms, this ring contacts with the upper-end surface of insulating sleeve 76, and this insulating sleeve surrounds the circumference of plug pin 42.Insulating sleeve 76 and extended through seal disc 24 by the plug pin 42 that its surrounds is with reference to Fig. 5 .1 and 5.2.

In form of implementation shown in Figure 7, plug pin 42 also comprises groove 78, by it-as combining the said ground of Fig. 4-produced confining force 80, as shown in Figure 4.Can directly make electromagnetic coil 28 and the magnetic core 26 that surrounds electromagnetic coil 28 is remained in sleeve body 16 interior its positions through the groove on the plug pin 42 78.

Fig. 8 representes the plan view of the inserting terminal of the magnetic head of proposition according to the present invention.

Fig. 8 expresses, and housing 14 comprises two contact devices 44 (also with reference to the view according to Fig. 1) in the zone of inserting terminal 46.View by according to Fig. 8 can see that two contact devices 44 respectively have semicircle contact 94, and they contact with plug pin 42.Semicircle contact 94 surrounds the head of plug pin 42 on about 180 ° angular range; Because this situation exists such possibility; Can regulate the plug extension in this wise, so that corner that this plug extension can be inswept at least 170 ° 90 and can being set on the different angular orientations thus.Two semicircle contacts 94 are disconnected through gap 92 in housing 14.Label 90 indication corners, this corner is about 170 ° according to the view of Fig. 8.

By Fig. 9 .1 and 9.2 can see housing inside the head of plug pin and semicircle contact-as shown in Figure 8-between the form of implementation that contacts.

Fig. 9 .1 representes an embodiment of semicircle contact 94, and wherein contact position 98 is positioned on the circumference of plug pin 42.In this form of implementation, semicircle contact 94 surrounds the head of plug pin 42 and extend in the dead slot 78 of flute profile of plug pin 42 in the side with its open leg end.View by according to Fig. 9 .2 can be seen: the contact device 44 here has at least one semicircle contact 94.With the different ground of embodiment among Fig. 9 .1, semicircle contact 94 of expression in the form of implementation of the contact device shown in Fig. 9 .2 44 with narrowed portion 96.Is material concentrating portions of inside formation of semicircle contact 94 through this narrowed portion 96 on semicircle contact 94 excircles at contact device 44, extend in the groove 78 on the plug pin 42 according to this material concentrating portions of Fig. 9 .2.Plug pin 42 is connected with semicircle contact 94 shapes in this way sealedly, wherein, forms at least one contact position 98 in the dead slot 78 of the flute profile in the head zone of plug pin 42.

Two forms of implementation shown in Fig. 9 .1 and 9.2 through contact device 44 can guarantee: the groove 78 by flute profile on plug pin 42 is acting on the described confining force 80 of combination Fig. 4, and this confining force stops electromagnetic coil 28 and magnetic core 26 by dropping out in their mounting points in sleeve body 16.

The plan view and the side view of Figure 10 .1 and 10.2 expression housings.

View by according to Figure 10 .1 can find out that housing 14 has upper side 104.Structure has the hinge 38 of each dome shape on this upper side 104.Each hinge 38 has a receiving part 102, in this receiving part, inserts the rotatingshaft 100 of gripping bow 54.The inserting terminal of the side direction of housing 14 is indicated by label 46.Can see by view in addition according to Figure 10 .1: in this embodiment, with housing 14 that sleeve body 16 can be connected clampingly on be provided with two gripping bows 54.

Figure 10 .2 representes, the hook 40 that gripping bow 54 has illustrated in having rotatingshaft 100 on the one of which end and on its other end, having like Fig. 1.In the state that is held of housing 14, hook 40 is engaged in the dead slot 30 on the outer side surface 18 of sleeve body 16.Rotatingshaft 100 also is inserted in the receiving part 102 of the domeshape hinge 38 on the upper side 104 of housing 14.Look clamping force size and required seal action and decide, the elasticity can regulate elastic prestress of the leg through gripping bow 54 reaches regulates said confining force thus.

Claims

1. the fuel injector that has a solenoid valve; This solenoid valve comprises that one has the magnetic head (10) of a sleeve body (16); One magnetic core (26) and an electromagnetic coil (28) have been installed in this sleeve body; This electromagnetic coil (28) forms through plug pin (42) and electrically contacts; It is characterized in that: electrically contacting through the housing (14) that can be provided with of said electromagnetic coil (28) realizes that this housing is clamped on the said sleeve body (16) with reversing, and said housing (14) has one by preformed, integrated backflow part (22); The contact device (44) that is configured in the said housing (14) is configured to semicircle contact (94), and these semicircle contacts make the head that said housing (14) can said relatively plug pin (42) in a corner (90), rotate.

2. according to the fuel injector of claim 1, it is characterized in that: said sleeve body (16) is a metal parts deep drawn, heat or cold forming.

3. according to the fuel injector of claim 1, it is characterized in that: said sleeve body (16) on its outer side surface (18), have one be used for locking gripping bow (40,54) around a dead slot (30) and an instrumental purpose place (52).

4. according to the fuel injector of claim 1, it is characterized in that: between the end face (50) of said housing (14) and said sleeve body (16), be provided with a seal disc (24).

5. according to the fuel injector of claim 4, it is characterized in that: said seal disc (24) is being configured in toothing or rib structure (86) on the end face (50) of said housing (14) by preload through one on its excircle.

6. according to the fuel injector of claim 1; It is characterized in that: said housing (14) has the inserting terminal (46) of a side direction; This inserting terminal is connected with contact device (44), and the head that is used for the plug pin (42) that electrically contacts of said electromagnetic coil (28) stretches into said contact device.

7. according to each fuel injector in the claim 1 to 6, it is characterized in that: said housing (14) is configured to injection molding spare.

8. according to each fuel injector in the claim 1 to 6; It is characterized in that: said housing (14) has a upper side (104); On this upper side, be provided with the hinge (38) of some domeshapes, these hinges respectively have at least one receiving part that is used at least one gripping bow (54) (102).

9. according to the fuel injector of claim 1; It is characterized in that: the said magnetic core (26) that surrounds said electromagnetic coil (28) is supported in the said sleeve body (16) by an adhesive layer (60), perhaps is supported in the said sleeve body (16) or through a stop sleeve (70) through a retaining ring (64) to be supported in the said sleeve body (16).

10. according to each fuel injector in the claim 1 to 3, it is characterized in that: these plug pins (42) in their head zone, have that at least one annular is extended, be used for a contact device (44) go up produce one electrically contact (98) dead slot (78) and these plug pins (42) in their axial extensions, surrounded by an insulating sleeve (76).

11. the fuel injector according to claim 4 is characterized in that: these plug pins (42) in their head zone, have that at least one annular is extended, be used for a contact device (44) go up produce one electrically contact (98) dead slot (78) and these plug pins (42) in their axial extensions, surrounded by an insulating sleeve (76).

12. fuel injector according to claim 11; It is characterized in that: in the end face (50) of said housing (14), constructed a ring (88), opening (56) in this ring sealing said insulating sleeve (76), the said sleeve body (16) and the opening (84) in the said seal disc (24).

13. the fuel injector according to claim 7 is characterized in that: said housing (14) is configured to plastic injection piece.