CN101660473B - Electromagnetic actuator - Google Patents

Abstract

An electromagnetic actuator of the present invention airtightly seals a stator containing space (42) of a main stator (16) relative to an armature containing space (41) of a containing armature (14) by using a first magnetic ring (61) of an auxiliary stator (17) and a complete cycle welding portion (P1) of a barrier body (18), a second magnetic ring (62) of the auxiliary stator (17) and a complete cycle welding portion (P2) of a middle housing (19), a complete cycle welding portion (P3) of the first magnetic ring (61) and the non-magnetic ring (64) of the auxiliary stator (17), a complete cycle welding portion (P4) of the second magnetic ring (62) and the non-magnetic ring (64) of the auxiliary stator (17), a complete cycle welding portion (P5) of the middle housing (19) and an upper housing (20), and the like.

Description

Electromagnetic driver

Technical field

The present invention relates to drive the electromagnetic driver of moving body, particularly relate to and possess the solenoid valve that makes the electromagnetic driver that valve moves back and forth.

Background technique

In the past; We know that having valve uses solenoid valve with the sparger of the electromagnetic driver that this valve is moved back and forth along its axial direction; Said valve is located in or leaves to be arranged in internal-combustion engine and sprays the orifice plate of the fuel injection nozzle upper end of fuel supplying, thereby closes or open spray-hole.

In order to improve the action response property of electromagnetic driver, the big fixed magnetic core of action response property effect or the material of movable magnetic core are used complex sintered magnetic material sometimes.

Shown in figure 12; Complex sintered magnetic material is made up of the complex sintered magnetic material that the composite magnetic sintering curing with compre sion molding forms; The composite magnetic of said compre sion molding is through with the moulding of mould compression compression powder (composite magnetic), and said compression powder forms with magnetic metal powder of dielectric film (for example oxide or synthetic resin tunicle) 101 clad surface of nonmagnetic substance system (for example iron powder etc.) 102 and synthetic resin powder 103 moulding through compression.

This complex sintered magnetic material has and produces the little advantage of eddy current, otherwise but has intensity and hardness is little and crisp such shortcoming.Therefore, the electromagnetic attracting force movable magnetic core that exists fixed magnetic core to utilize coil to produce, the impact energy that movable magnetic core impact fixed magnetic core produces make the fixed magnetic core or the damaged possibility of movable magnetic core of complex sintered magnetic material system.

Therefore; That kind shown in figure 13 has proposed to have the movable magnetic core that the valve needle 55 that makes fuel injection valve for IC engines (sparger) moves back and forth along its axial direction; Be arranged on the 1/ 2nd housing 111/112 that bottom tube-like is arranged of Fuelinjection nozzle upper end; Be housed in the electromagnetic coil 113 in these the 1/ 2nd housings 111/112, and the electromagnetic force of utilizing this electromagnetic coil 113 to produce spurs the electromagnetic driver (reference example such as TOHKEMY 2004-88891 communique) of the fixed magnetic core of movable magnetic core.

And the movable magnetic core of electromagnetic driver has the plug type armature (armature) 104 that direct driving is housed in the valve needle 55 in the injector body.

And the fixed magnetic core of electromagnetic driver is by the main stator 106 that is housed in the inner complex sintered magnetic material system of the 2nd housing 112, and with the end face that leans on armature one side of this main stator 106 relatively the auxiliary stator 107 of the soft magnetic material system of configuration constitute.And, be formed with the armature containing space 114 of accommodating armature 104 in the inside of the 2nd housing 112 with moving freely, and move the stator containing space 115 of accommodating main stator 106 freely.And the axle 116 that main stator 106 usefulness are formed on the cylindrical bar shape on the auxiliary stator 107 is fixed on the 2nd housing 112.

In addition, armature 104 has and the end face (magnetic pole strength) of armature one side of auxiliary stator 107 between separate the relatively end face (magnetic pole strength) that leans on auxiliary stator one side of configuration of predetermined air clearance (being designated hereinafter simply as " gap ").

On the other hand; We also know following electro-magneto fuel injector: shown in figure 14, and on the internal magnetic iron core of magnetic material system 121 and the magnetic material system outside magnetive cord 122 that is configured in these internal magnetic iron core 121 radial outsides, along having formed 8 slits 123,124 (reference example such as Japan real open flat 5-83360 communique) with equal spacing on its central axis direction.

This electro-magneto fuel injector is owing to formed 8 slits 123,124 on internal magnetic iron core 121 and outside magnetive cord 122; Cut apart each other; Therefore when cut-out is wound on the driving current that flows through in the electromagnetic coil 126 on the bobbin 125; The foucault current that produces in internal magnetic iron core 121 and the outside magnetive cord 122 is not to be created on the side face of whole magnetive cord, but is created on the side face of each partitioning portion.Thus, if internal magnetic iron core 121 and outside magnetive cord 122 are divided into 8 parts, the path of foucault current is the length more than 2 times of the girth of the magnetive cord of the circular cross-section do not cut apart.That is, if magnetic loop is cut apart, then the path of foucault current becomes the length more than 2 times.

But in the electromagnetic driver that TOHKEMY 2004-88891 communique is put down in writing, the gap that forms between the inner peripheral surface of armature containing space 114 and stator containing space 115 outer circumferential face through auxiliary stator 107 and the 2nd housing 112 is being communicated with.

Wherein, generally be full of fuel in the armature containing space 114.Therefore; Use in hypothesis to have under the situation that corrosive fuel acts as a fuel-for example use DME fuel (dimethyl ether fuel) or CNG fuel (Liquefied Natural Gas fuel), use under the situation of the fuel that contains the corrosivity composition; Have the gap that forms between the inner peripheral surface of outer circumferential face and the 2nd housing 112 of corrosive fuel through auxiliary stator 107 and flow into stator containing spaces 115 from armature containing space 114; Contact with the main stator that constitutes by complex sintered magnetic material 106; Exist the synthetic resin composition that comprises in the complex sintered magnetic material (synthetic resin powder or synthetic resin by overlay film etc.) to be had corrosive fuel aging (deterioration), the problem that durability reduces.

On the other hand; Japan is real to open in the electro-magneto fuel injector that flat 5-83360 communique put down in writing, and between the interior week of the periphery of internal magnetic iron core 121 and outside magnetive cord 122, is provided with molded and shaped and be wound up into the electromagnetic coil 126 on the bobbin 125 with synthetic resin.

And, between wiring terminal and connector that the terminal lead of electromagnetic coil 126 is connected, the synthetic rubber system O type circle in the gap between sealed wiring post and the connector is installed.Thus, the synthetic resin of molded and shaped electromagnetic coil 126 might contact with fuel with the O type circle of synthetic rubber system.Have under the situation that corrosive fuel acts as a fuel in use, exist the O type circle of synthetic resin and synthetic rubber system of molded and shaped electromagnetic coil 126 aging, the problem that durability reduces by fuel.

Summary of the invention

The object of the invention is exactly to protect the resinous principle (resin-oatmeal etc.) that comprises in the composite magnetic not receive fuel one especially to have corrosive fuel corrosion, and a kind of electromagnetic driver that can improve durability is provided thus.

In order to achieve the above object; The electromagnetic driver of application of the present invention; Have the movable magnetic core that drives moving body and this movable magnetic core relatively the fixed magnetic core of configuration have the housing of the inner space of accommodating above-mentioned movable magnetic core and said fixing magnetic core, and be maintained at this housing inside, accept electric power supply, make the coil of generation magnetic attraction between above-mentioned movable magnetic core and the said fixing magnetic core; It is characterized in that: the said fixing magnetic core has by metal powder and resin-oatmeal being solidified the main stator that the composite magnetic that forms forms, and disposes relatively with the end face by movable magnetic core one side of this main stator, comprises soft magnetic material and the auxiliary stator that constitutes; Above-mentioned auxiliary stator is divided into the inner space of above-mentioned housing on the 1st space of accommodating above-mentioned movable magnetic core and the ground, the 2nd space of accommodating above-mentioned main stator, is set at the centre in above-mentioned the 1st space and above-mentioned the 2nd space; Above-mentioned housing has to be configured in than above-mentioned main stator and leans on inboard radially so that cover bottom tube-like the 1st metal tube being arranged and be configured in than above-mentioned main stator and leaning on radially the outside so that cover tubular the 2nd metal tube of the whole periphery of above-mentioned main stator of week in above-mentioned main stator whole; Above-mentioned the 1st metal tube is formed by nonmagnetic metal, constitutes as the baffle element that lifts the position fully that limits above-mentioned movable magnetic core; Above-mentioned auxiliary stator has annular the 1st magnetic portion that is provided with contiguously with above-mentioned the 1st metal tube, and annular the 2nd magnetic portion that is provided with contiguously with above-mentioned the 2nd metal tube; Above-mentioned the 1st magnetic portion is engaged with on above-mentioned the 1st metal tube through full week welding; Above-mentioned the 2nd magnetic portion is engaged with on above-mentioned the 2nd metal tube through full week welding; Above-mentioned housing is through airtight or liquid thickly seals with respect to above-mentioned the 1st space with above-mentioned the 2nd space with the weld part of above-mentioned auxiliary stator.

Description of drawings

Fig. 1 is a sectional view (embodiment 1) of having represented sparger;

Fig. 2 has represented the sectional view (embodiment 1) of sparger with solenoid valve;

Fig. 3 is a sectional view (embodiment 1) of having represented electromagnetic driver;

Fig. 4 is the plan view (embodiment 1) of expression auxiliary stator (magnetic+non magnetic plate);

Fig. 5 (a) and (b) are for having represented perspective view, the sectional view (embodiment 2) of auxiliary stator (magnetic sheet);

Fig. 6 (a) and (b) are for having represented plan view, the perspective view (embodiment 3) of auxiliary stator (magnetic+non magnetic plate);

Fig. 7 is for having represented the unfolded drawing (embodiment 3) of auxiliary stator (magnetic+non magnetic plate);

Fig. 8 is for having represented the perspective view (embodiment 4) of auxiliary stator (magnetic sheet);

Fig. 9 is a plotted curve (embodiment 4) of having represented the magnetic attraction waveform;

Figure 10 is a sectional view (embodiment 5) of having represented the electromagnetic driver of sparger;

Figure 11 (a) is for having represented the plan view of auxiliary stator (magnetic+non magnetic plate), (b) for having represented the perspective view (embodiment 5) of magnetic sheet;

Figure 12 is a concept map (existing technology) of having represented complex sintered magnetic material;

Figure 13 is a sectional view (existing technology) of having represented to have the sparger of electromagnetic driver;

Figure 14 is a sectional view (existing technology) of having represented electro-magneto fuel injector.

Embodiment

The preferred configuration that is used for embodiment of the present invention combines housing through full week welding with the weld part (connecting part) of auxiliary stator; Airtight or liquid thickly seals with respect to the 1st space of accommodating movable magnetic core with the 2nd space of accommodating main stator, realizes thus not receiving the corrosion of fuel-especially have corrosive fuel to improve the such purpose of durability of electromagnetic driver through the resin composition (resin-oatmeal etc.) that comprises in the protection composite magnetic.

[embodiment 1]

< embodiment 1 structure >

Fig. 1 to Fig. 4 is the figure of the expression embodiment of the invention 1, and Fig. 1 is the figure of expression sparger, and Fig. 2 is the figure of expression sparger with solenoid valve, and Fig. 3 is the figure of expression electromagnetic driver, and Fig. 4 is the figure of expression auxiliary stator (magnetic+non magnetic plate).

The common rail type fuel injection system (accumulator fuel injection device) of the fuel injection system of present embodiment for being in the public eye as the fuel injection system that for example has internal-combustion engines such as DENG (motor) usefulness of a plurality of cylinders.

The structure of this common rail type fuel injection system is: have with fuel pressurization become high pressure fuel feed pump (supply pump), will use the common rail of the fuel under high pressure pressure accumulation that the supply pump force feed comes and distribute a plurality of spargers of supplying with fuel under high pressure from this common rail, the fuel under high pressure that will be total to pressure accumulation in the rail through each sparger is sprayed in the firing chamber of each cylinder that offers motor.

The sparger of present embodiment carries for each cylinder with motor accordingly, and the fuel under high pressure that is total to the inner pressure accumulation of rail is injected into the vaporific direct injection type fuel injection valve for IC engines that directly is provided in the firing chamber.The electro-magneto fuel injector that this sparger constitutes with solenoid valve etc. for the sparger of the valve body that drives this fuel injection nozzle by fuel injection nozzle with to the direction of opening valve events; Said fuel injection nozzle is connected from the downstream of the fuel flow direction of a plurality of sparger pipelines that are total to rail branch, burner oil in the past firing chamber of each cylinder of motor.

The sparger of present embodiment orifice plate (valve seat) 3 is clipped in the ejector body (lower body) 1 of the jet nozzles housing that acts as a fuel and as the state between the valve body 2 of solenoid valve housing under; On the periphery with the fastening axial direction rearward end (diagram upper end portion) that is fixed on ejector body 1 of flange plate housing 4, through like this fuel injection nozzle and solenoid valve being combined into an integral body.

Fuel injection nozzle has ejector body 1; Open and close the valve needle 5 of a plurality of spray-holes; Accommodate the nozzle body 6 of this valve needle 5, the rearward end (diagram upper end portion) that is connected valve needle 5 axial directions goes up, is housed in free sliding the control piston (commandpiston) 7 of ejector body 1 inside free sliding.

Solenoid valve by be installed in orifice plate 3 on the fuel injection nozzle axial direction rearward end (diagram upper end portion), can be in place on this orifice plate 3 or the valve (valve body of solenoid valve) 10 that breaks away from and the electromagnetic driver that drives this valve 10 constitute.

Electromagnetic driver has to the direction of opening valve events or the direction of closing valve events and drives the cylindrical shape electromagnet that promotes the helical spring 11 of this movable magnetic core and produce the electromagnetic force of pulling movable magnetic core as the movable magnetic core of the valve 10 of electromagnetic valve body, direction (closing the direction of valve events) on the valve seat that this movable magnetic core is pushed through orifice plate 3 with valve 10.This electromagnet produces the solenoid (electromagnetic coil) 12 of magnetic attraction (electromagnetic force) by the supply of accepting electric power between movable magnetic core and fixed magnetic core, and the formations such as fixed magnetic core of utilizing electromagnetic force pulling (attraction) movable magnetic core that produces in this electromagnetic coil 12.

Wherein, The movable magnetic core of the driving solenoid valve valve 10 of electromagnetic driver has and leaning on of the auxiliary stator 17 of fixed magnetic core separates the predetermined gap plate armature 14 of configuration relatively between the end face (magnetic pole strength of electromagnet) of armature one side, and (armature lever) 15 of supporting along axial direction freedom of movement ground by valve body 2 etc.

The fixed magnetic core of electromagnetic driver is by the main stator 16 of the complex sintered magnetic material system of electromagnetic coil 12 being accommodated inside and be configured in than this main stator 16 and lean on the soft magnetic material (soft magnetic material) of armature one side and the formations such as auxiliary stator 17 of nonmagnetic substance formation.

In addition, used the sparger of the electromagnetic driver of present embodiment to narrate at the back with the details of solenoid valve.

The valve needle 5 of fuel injection nozzle opens and closes a plurality of spray-holes that form on the nozzle body 6.

Nozzle body 6 and ejector body 1 usefulness for example metallic material such as Cr-Mo steel or low carbon steel are formed drum.

On the top of the axial direction of nozzle body 6, be formed with a plurality of spray-holes of inject high pressure fuel in the firing chamber of each cylinder of motor.And,, be formed with fuel and hold and stay chamber 21 at the central position of the axial direction of nozzle body 6.And, be formed with pressure controling chamber 22 in the rear end (diagram upper end) of the axial direction of ejector body 1.And, along closing the axial direction front end (diagram underpart) that helical spring (pin pushing mechanism) 23 that the valve direction promotes valve needle 5 is housed in ejector body 1.

And; The inside of nozzle body 6 and ejector body 1, the inlet that is formed with through catching the pipe joint that the valve filter that is blended into the foreign matter in the fuel connects from rail together holds the fuel supply channel (high pressure fuel passage) 24 that stays chamber 21 and pressure controling chamber 22 to provide fuel under high pressure to use toward fuel.

And, orifice plate 3 is installed at the opening peripheral portion of pressure controling chamber 22.Be formed with the inlet side/outlet side opening 25/26 of the flow fuel of regulating process in the inside of orifice plate 3.

Pressure controling chamber 22 is communicated with fuel supply channel 24 through the inlet side opening 25 that forms in the orifice plate 3.And pressure controling chamber 22 is communicated with exhaust port 28 or armature containing space 41 through outlet side opening 26, the valve containing room of solenoid valve one side, fuel discharge route 27.

And, be formed with the spring containing space 29 of accommodating helical spring 23 in the inside of ejector body 1.

The residual fuel that flows in the fuel recovery passage is got back in the fuel tank via fuel discharge route, the exhaust port 28 of solenoid valve one side.

And, in the rearward end of the axial direction of ejector body 1, as depicted in figs. 1 and 2 being provided with to the outstanding cylindrical part 31 in diagram top.In the interior week of this cylindrical part 31, be formed with the interior all screw sections on the periphery screw section of the valve body 2 that is screwed in solenoid valve one side.And,, be formed with the periphery screw section on interior all screw sections of the flange plate housing 4 that is screwed in solenoid valve one side in the periphery of cylindrical part 31.

Cylindrical part 31 have with after configuration, the plane relatively sealing surface (opposing side) in diagram lower end surface (sealing surface) of the intermediate washer 33 stated; Between the annular end face of the annular end face of the cylindrical part 31 through intermediate washer 33 being clipped in ejector body 1 and the stepped part 32 of flange plate housing 4, make the sealing surface face seal of the sealing surface and the intermediate washer 33 of cylindrical part 31.

According to Fig. 1 and Fig. 2 the details of the sparger of the electromagnetic driver that has used present embodiment with solenoid valve is described below.

The solenoid valve of present embodiment is made up of valve body 2, orifice plate 3, flange plate housing 4, valve 10 and electromagnetic driver as stated.This electromagnetic driver has: to opening the valve events direction or closing the movable magnetic core (armature 14) that the valve events direction drives the valve 10 of solenoid valve; And separate the predetermined gap fixed magnetic core (main stator 16, auxiliary stator 17) of configuration relatively between this movable magnetic core; Housing with inner space of movable magnetic core of accommodating and fixed magnetic core remains on the inside of this housing, in case the supply that receives electric power just produces the electromagnetic coil 12 of electromagnetic force.

Valve 10 forms hemisphere face body (ball) shape for the valve body (ball valve) of the spherical surface body shape of axle 15 tip side that remain on movable magnetic core with for example pottery.This valve 10 is gone up or is left through the peripheral portion (valve seat of orifice plate 3) of outlet side opening 26 openings to orifice plate 3 in place, closes or opened the outlet side opening 26 of solenoid valve valve opening effect.And valve 10 is driven into valve full close position of closing outlet side hole 26 to the orifice plate 3 in place and leaves on these 2 positions of valve fully open position that orifice plate 3 is opened to oral-lateral hole 26 by electromagnetic driver.

Wherein, the housing of electromagnetic driver is made up of following several parts: the lower case (valve body 2, orifice plate 3) that is made up of non magnetic steel; The flange plate housing 4 that constitutes by non magnetic steel; The cup-shaped baffle element (the 1st metal tube that bottom tube-like is arranged) 18 that constitutes by non magnetic steel; The cylindric middle casing (tubular the 2nd metal tube) 19 that constitutes by non magnetic steel or magnetic steel; The upper body 20 that constitutes by non magnetic steel; The ring intermediate washer 33 that constitutes by non magnetic steel.

And the housing of electromagnetic driver has the inner space of movable magnetic core of accommodating (armature 14) and fixed magnetic core (main stator 16, auxiliary stator 17).The inner space of this housing has the armature containing space (the 1st space) 41 and the stator containing space (the 2nd space) 42 of accommodating main stator 16 of the armature at least 14 of accommodating fuel and movable magnetic core.In addition, be formed with the cylindric coil containing space 43 of accommodating electromagnetic coil 12 in the inside of main stator 16.And, be formed with the spring containing space 44 of accommodating helical spring 11 in the inside of baffle element 18.

The armature containing space 41 of present embodiment is discoideus space, and (spy of auxiliary stator 17 is to the interior wall of armature containing space 41: the armature side end face) for the wall (armature side end face) of the spy that is formed on valve body 2 in the armature containing space 41 and the magnetic pole strength of electromagnet.The peripheral part of this armature containing space 41 is covered to the internal face (along the internal face of circumferential encirclement armature 14 outer peripheral portions) in the armature containing space 41 by the spy of the cylindrical part 31 of ejector body 1.

And; The stator containing space 42 of present embodiment is cylindric space, and the spy of the wall (main stator side end face) of the spy that is formed on auxiliary stator 17 in the stator containing space 42 and upper body 20 is between the interior wall (main stator side end face) of stator containing space 42.The interior perimembranous of this stator containing space 42 is covered to the wall (outer circumferential face) in the stator containing space 42 by the spy of baffle element 18.And the peripheral part of stator containing space 42 is covered to the wall (inner peripheral surface) in the stator containing space 42 by the spy of middle casing 19.

The non magnetic steel of valve body 2 usefulness (for example Cr-Mo steel) form drum.Be formed with fuel discharge route 27 in the inside of this valve body 2.And valve body 2 is formed with the armature containing space 41 of accommodating fuel and armature 14 the magnetic pole strength and the lifting of baffle element 18 of the auxiliary stator 17 of electromagnet between the limiting faces.And, on the central axis of valve body 2, be formed with the sliding eye (through hole) that the axle 15 that supplies movable magnetic core slides.And, be provided with the opening diameter valve containing room bigger than the aperture of sliding eye at the opening end of orifice plate one side of sliding eye.And the vibration (bounce) when closing valve in order to reduce solenoid valve is formed with to accommodate at the opening end of armature one side of sliding eye and makes the gap adjustment that has fuel flow resistance (oily close damping function) between valve body 2 and the armature 14 circular depression with plate 34.

The non magnetic steel of flange plate housing 4 usefulness (for example Cr-Mo steel) form drum.This flange plate housing 4 has the interior all screw sections on the periphery screw section of cylindrical part 31 of ejector body of being screwed in 1.And the ratio stepped part 32 of flange plate housing 4 has heavy section by diagram top one side, and has the thinner wall section thinner than heavy section than stepped part 32 by diagram below one side.In addition, between the periphery of interior week of flange plate housing 4 and upper body 20, dispose the O type circle 45 that is used for guaranteeing bubble-tight synthetic rubber system.

The movable magnetic core of present embodiment is used as pure iron or the low-carbon steel or ferrite magnetic stainless steel (SUS13) formation (formation) of soft magnetic material one example.This movable magnetic core is a real columned axle 15 and discoideus armature 14 incorporate one-piece elemenies in making, and constitutes the magnetic movable body (moving magnetic core) that edge and the identical direction of direction (central axial direction of solenoid valve) that the valve 10 of solenoid valve moves move back and forth.

The axle 15 of movable magnetic core is outstanding to the top of axial direction one side (diagram below) from the central part of the end face opposite with auxiliary stator one side of armature 14.Be supported in the sliding eye of valve body 2 this 15 free sliding.And valve 10 is assembled in the depressed part on axle 15 axial direction top.

The armature 14 of movable magnetic core has the magnetic pole strength that separates the relative configuration in predetermined interval with the magnetic pole strength (magnetic pole strength of auxiliary stator 17) of electromagnet on the end face (diagram upper-end surface) of its auxiliary stator one side.Be formed with a plurality of through holes that run through armature 14 along axial direction (the thickness of slab direction of armature 14) on this armature 14.Form these through holes and be for the unwanted fuel between the magnetic pole strength of the magnetic pole strength of releasing the auxiliary stator 17 that is clipped in electromagnet when the limiting faces butt of armature 14 and baffle element 18 and armature 14.

In addition, axle 15 also can use parts separately to constitute with armature 14, through be pressed into or welding etc. both is combined.At this moment, can use good Bearing Steel of anti-sliding and nonmagnetic substance material as axle 15.

Movable magnetic core is by magnetic pole strength one side of the electromagnetic attracting force of electromagnetic coil 12 to auxiliary stator 17, along the direction of opening valve events (top one side of the axial direction of electromagnetic driver (direction): illustrated top one side) move.Thus, valve 10 leaves the valve seat of orifice plate 3, opens outlet side opening 26.

When stopping to electromagnetic coil 12 energisings; Movable magnetic core the effect of the thrust (elastic load) of helical spring 11 down to the direction of closing valve events (below one side (another direction) of the axial direction of electromagnetic driver: diagram lower direction one side) mobile, with valve 10 ejections to orifice plate 3.Thus, valve 10 is in place to the valve seat of orifice plate 3, closes outlet side opening 26.

That is, when the thrust of helical spring 11 pushes back the diagram below with movable magnetic core, when movable magnetic core moved to valve seat (diagram upper-end surface) side of orifice plate 3, used as the 1st limiting faces of the amount of movement of the armature 14 of restriction movable magnetic core the diagram upper-end surface of orifice plate 3.Thus, in place on the 1st limiting faces of orifice plate 3 time when valve 10, valve 10 is limited no longer to continue to move with movable magnetic core.That is, the position of valve 10 has become default location.Follow in this, the position of armature 14 is limited on this default location.

Therefore, if adopt the solenoid valve of present embodiment, constitute normal close type (normal close type) electromagnetic opening and closing valve.

Electromagnet is by the electromagnetic coil 12 that produces magnetic flux around switching on, and the fixed magnetic core that when flowing through field current (sparger driving current) in this electromagnetic coil 12, is magnetized formations such as (main stator 16, auxiliary stators 17).

Electromagnetic coil 12 is for producing the solenoid of magnetic attraction (electromagnetic force) between movable magnetic core (armature 14) and fixed magnetic core (main stator 16, auxiliary stator 17) when accepting the supply of electric power.This electromagnetic coil 12 has twined the lead that many circles have been implemented the insulation tunicle in the periphery of plastic coil-winding pipe 13.Coil-winding pipe 13 is the resin forming part in the coil containing space 43 of accommodating main stator 16.

In addition, the electromagnetic coil 12 that is wound up in the coil containing space 43 of main stator 16 on the coil-winding pipe 13 is molded and shaped by synthetic resin (molding resin).

The a pair of terminal lead that electromagnetic coil 12 has the coil portion between the pair of flanges portion that is wound on coil-winding pipe 13 and extracts out from this coil portion.

Pair of outer splicing ear (stud bolt) 47 is electrically connected on a pair of terminal lead of drawing from electromagnetic coil 12 through a pairs of posts 46.

One pairs of posts 46 runs through the wiring terminal through hole 48 ground settings that form on the upper body 20 along axial direction.And, be wrapped on the 1st connecting part of wiring terminal 46 through terminal lead and carry out rivet hot electromagnetic coil 12, electromagnetic coil 12 and wiring terminal 46 are electrically connected.A pair of stud bolt 47 protrudes in bolt axis under the state of end face (diagram upper-end surface) of plastic connector shell (wiring terminal resin) 49, and bolt head remains fixed in the connector shell 49.These stud bolts 47 wait through 2nd connecting part of bridge joint wiring terminal (not expression among the figure) with wiring terminal 46 through welding and are electrically connected.

Wherein, Bad in order to prevent to have blocked the response that remanent magnetism causes behind the field current that flows through in the electromagnetic coil 12, even there is the gap (gap) of suitable axial direction in the solenoid valve of present embodiment between the magnetic pole strength of the magnetic pole strength of also guaranteeing armature 14 under the state that the armature 14 of movable magnetic core lifts fully and auxiliary stator 17.This gap is guaranteed by baffle element 18.

The Cr-Mo steel (SCM415 etc.) that the baffle element 18 of present embodiment is used as non magnetic steel one example constitutes (formation).And, the nonmagnetic metal pipe that the round-ended cylinder shape is arranged that baffle element 18 stops up for the other end one side (diagram lower end one side) opening, an end one side (diagram upper end one side).And,, main stator 16 is housed in the stator containing space 42 in order to make the interior perimembranous of baffle element 18 guiding main stators 16.This baffle element 18 is configured in than the interior week of the main stator 16 of electromagnet leaning on inboard radially.

And baffle element 18 contacts with the interior perimembranous (inner peripheral surface) of the auxiliary stator 17 of fixed magnetic core or configuration relatively.

The armature baffle element of the position that baffle element 18 lifts for the armature 14 of the position of restriction movable magnetic core-especially fully, and form predetermined tubular gap between the inner peripheral surface (internal face) of the main stator 16 of electromagnet.The inside of this baffle element 18 (spring containing space 44) contains the helical spring 11 that direction (closing the direction of valve events) on the valve seat that valve 10 and movable magnetic core is pushed through orifice plate 3 promotes valve 10 and movable magnetic core.

Electromagnetic force pulling movable magnetic core above diagram when electromagnetic coil 12; When making movable magnetic core move to magnetic pole strength one side of auxiliary stator 17, the top end of the axial direction of baffle element 18 (diagram lower end surface) uses as armature 14 the lifting limiting faces of position of lifting fully of restriction movable magnetic core.Thus, when armature 14 and baffle element 18 lift the limiting faces butt time, movable magnetic core is limited no longer to continue to move.That is, the position of armature 14 has become and has lifted the position fully.Follow in this, the position that valve 10 lifts also is limited in lifting on the position fully.

The magnetic pole strength of the auxiliary stator that lifts limiting faces and electromagnet 17 of baffle element 18 forms with one side.In addition, the magnetic pole strength that lifts limiting faces and auxiliary stator 17 of baffle element 18 is not limited to one side, also can be baffle element 18 to lift limiting faces more side-prominent to armature one than the magnetic pole strength of auxiliary stator 17.

In order to prevent to have stoped the response that remanent magnetism causes behind the field current that flows through in the electromagnetic coil 12 bad, baffle element 18 hopes to form with non magnetic steel (nonmagnetic metal).And baffle element 18 has the outer circumferential face cylindraceous (footpath is the outer side surface more outer than the opening portion of spring containing space 44 upwards) that the inner peripheral surface with auxiliary stator 17 is oppositely arranged.And, the inner peripheral surface butt of the outer circumferential face of baffle element 18 and auxiliary stator 17.And baffle element 18 is combined on the inner peripheral surface of auxiliary stator 17 through complete all laser bonding.

The Cr-Mo steel (SCM415 etc.) that the middle casing 19 of present embodiment is used as non magnetic steel one example constitutes (formation).This middle casing 19 is the nonmagnetic metal pipe cylindraceous of both ends open.In addition, middle casing 19 both can use non magnetic steel (nonmagnetic metal) to constitute, and also can use magnetic steel (magnetic metal) to constitute.

And,, main stator 16 is housed in the stator containing space 42 in order to make the peripheral part of middle casing 19 guiding main stators 16.The whole periphery ground that this middle casing 19 covers the main stator 16 of electromagnet is provided with, and promptly along circumferential setting peripherally around main stator 16, the outer circumferential face that is configured in than main stator 16 leans on the outside radially.

Middle casing 19 contacts with the peripheral part (the especially periphery ora terminalis of main stator one side end face) of the auxiliary stator 17 of electromagnet or configuration relatively.And middle casing 19 contacts with the peripheral part (the especially outer circumferential face of main stator one side) of upper body 20 or configuration relatively.

And middle casing 19 has big cylindric large diameter part (cylindrical part) of internal diameter and the little cylindric small diameter part (cylindrical part) of internal diameter.The periphery of the stepped part that between large diameter part and small diameter part, forms, to the outside radially be provided with highlightedly intermediate washer 33 is clipped in and the annular end face of the cylindrical part 31 of ejector body 1 between annular flange 50.

Flange 50 sandwich intermediate washers 33 ground are sandwiched between the annular end face of stepped part 32 of annular end face and flange plate housing 4 of cylindrical part 31 of ejector body 1.And; Flange 50 has and the diagram upper-end surface (sealing surface) of intermediate washer 33 sealing surface (opposing side) of the plane shape of configuration relatively; Between the annular end face of the annular end face of the cylindrical part 31 through intermediate washer 33 being clipped in ejector body 1 and the stepped part 32 of flange plate housing 4, the sealing surface of sealing surface and flange 50 that makes intermediate washer 33 is by face seal.

The large diameter part of middle casing 19 forms outer circumferential face cylindric of the outer circumferential face that covers main stator 16 and upper body 20.The large diameter part of this middle casing 19 has the inner peripheral surface that the outer circumferential face with the outer circumferential face of main stator 16 and upper body 20 is oppositely arranged.And, the outer circumferential face butt of the inner peripheral surface of the large diameter part of this middle casing 19 and upper body 20.And the large diameter part of middle casing 19 is combined on the outer circumferential face of upper body 20 through complete all laser bonding.

The small diameter part of middle casing 19 forms the cylindric of the outer circumferential face that covers main stator 16.The small diameter part of this middle casing 19 has the circular top end face (annular end face of armature one side of middle casing 19 small diameter parts) of the toroidal that the end face (outer Monday of side end face) that leans on main stator one side with auxiliary stator 17 is oppositely arranged.And, the circular top end face of armature one side of the small diameter part of middle casing 19 and the outer circumference side edge face butt of auxiliary stator 17.And the small diameter part of middle casing 19 is combined on the outer circumference side edge face of auxiliary stator 17 through complete all laser bonding.Thus, main stator 16 and baffle element 18 are remained fixed between auxiliary stator 17 and middle casing 19 and the upper body 20.

The non-magnetic stainless steel (SUS303 etc.) that intermediate washer 33 is used as non magnetic steel one example constitutes (formation).This intermediate washer 33 forms along near the toroidal of the periphery the flange 50 that circumferentially surrounds middle casing 19.And intermediate washer 33 is used intermediate washer for the adjustment of lifting of the amount that the armature 14 of the thickness decision movable magnetic core of utilizing self lifts fully, is clipped between the annular end face of flange 50 of annular end face and middle casing 19 of cylindrical part 31 of ejector body 1.

And, be formed with on the sealing surface (diagram upper-end surface) of intermediate washer 33 be used for improving and the sealing surface of the flange 50 of middle casing 19 between the ring depressed part (low-lying or groove) of sealing surface pressure.And, be formed with on the sealing surface (diagram lower end surface) of intermediate washer 33 be used for improving and the sealing surface of the cylindrical part 31 of ejector body 1 between the ring depressed part (low-lying or groove) of sealing surface pressure.

On the periphery screw section of the cylindrical part 31 through flange plate housing 4 being screwed in ejector body 1, clip intermediate washer 33 and the flange 50 of middle casing 19 is pushed through on the annular end face of cylindrical part 31 of ejector body 1.So, confirmed main stator 16, auxiliary stator 17, baffle element 18 and upper body 20 position with respect to ejector body 1.Thus, determined to be clipped between the limiting faces of magnetic pole strength and baffle element 18 of valve seat and auxiliary stator 17 of the orifice plate 3 between ejector body 1 and the valve body 2, set the amount that valve 10 and armature 14 lift fully in axial distance.

Above-mentioned upper body 20 usefulness for example nonmagnetic steel material (for example SCM415 etc.) form drum.This upper body 20 has along axial direction and runs through so that make diagram upper-end surface (end face of connector one side) and illustrate the wiring terminal through hole 48 that lower end surface (main stator one side end face) is communicated with.Because therefore the wall upper shed of this wiring terminal through hole 48 in visiting stator containing space 42 be communicated with stator containing space 42.And, the inside that the O type circle 52 of metal wiring terminal 46, plastic insulating bushing 51 and synthetic rubber system inserts wiring terminal through holes 48.

Insulating bushing 51 forms drum, for guaranteeing the insulator of the electric insulating quality between upper body 20 and the wiring terminal 46.And O type circle 52 is for guaranteeing the bubble-tight Sealing between upper body 20 and the wiring terminal 46.

And, end face (diagram upper-end surface) the butt ground configuration relatively of the end face that leans on main stator one side of upper body 20 and a side opposite of main stator 16 with the armature side end face.And,, be formed with and be pressed into the baffle element embedding hole (being pressed into the hole) 53 of diagram top one side (occlusive part one side) that chimeric (being pressed into fixing) inside has formed the baffle element 18 of spring containing space 44 at the central position of the end face that leans on main stator one side of upper body 20.

As stated, the fixed magnetic core of electromagnetic driver has the main stator that is made up of complex sintered magnetic material 16 and comprises auxiliary stator 17 that soft magnetic material constitutes etc.Main stator 16 and auxiliary stator 17 are the magnetic fixed body (stator core) through being magnetized with the armature 14 of movable magnetic core to electromagnetic coil 12 energisings.And main stator 16 forms magnetic loop with auxiliary stator 17 with electromagnetic coil 12 and armature 14.

Main stator 16 is made up of the complex sintered magnetic material that the composite magnetic sintering curing with compre sion molding forms; The composite magnetic of said compre sion molding is through forming with mould compre sion molding compression powder (composite magnetic), and said compression powder forms with magnetic metal powder of insulating coating (for example oxide or the synthetic resin overlay film) clad surface of nonmagnetic substance system (for example iron powder etc.) and synthetic resin powder (for example polyphenylene sulfide of good heat resistance (PPS) or polyimide resin (PI)) through compre sion molding.This complex sintered magnetic material has and produces the few advantage of foucault current, otherwise but has intensity and hardness is little and crisp such shortcoming.

All side magnetic cores portion, outer circumferential side magnetic core portion and the joint (upper end portion) that is connected this two-part magnetic core portion in this main stator 16 has, in being sandwiched between the interior week of the periphery of all side magnetic cores portion and outer circumferential side magnetic core portion ground form coil containing space 43.In all side magnetic core portions and outer circumferential side magnetic core portion form drum.And, contain electromagnetic coil 12 and coil-winding pipe 13 in the periphery of interior all side magnetic core portion and the coil containing space 43 that forms between the interior week of outer circumferential side magnetic core portion.And outer circumferential side magnetic core portion is being protected by middle casing 19 cylindraceous by external diameter one side on the radial direction than coil containing space 43 of main stator 16.

Wherein, main stator 16 form have with the stepped part 54 corresponding stepped part of middle casing 19 the dual drum in the end arranged, insert interior Monday of the side of middle casing 19.The periphery of the outer circumferential side magnetic core portion of main stator 16 is the boundary with the stepped part, and more past diagram below diameter is more little.So, connect through making stepped part and the stepped part 54 that is arranged on side Monday in the middle casing 19, can prevent that main stator 16 from coming off from middle housing 19.

Auxiliary stator 17 is and the end face that leans on armature one side of interior all side magnetic core portions of main stator 16 and the outer circumferential side magnetic core portion magnetic sheet (magnetic+non magnetic plate) of the Circular Plate shape of configuration relatively.And, auxiliary stator 17 have and the magnetic pole strength of the armature 14 of movable magnetic core between separate the relative magnetic pole strength of predetermined gap (leaning on the end face of armature one side).And for the spatial division with the electromagnetic driver enclosure interior becomes armature containing space 41 and stator containing space 42, auxiliary stator 17 is set at the centre of armature containing space 41 and stator containing space 42.

Auxiliary stator 17 has the non-magnetic ring 64 that is made up of the 1/ 2nd magnetic rings 61/62 and non magnetic steel, and said the 1/ 2nd magnetic rings 61/62 is made up of soft magnetic material.

The 1/ 2nd magnetic rings 61/62 constitutes (formation) by the silicon steel that contains element silicon in the iron as soft magnetic material one example.The content that present embodiment uses element silicon is at (the 1LSS～3LSS) of the silicon steel more than the 1 quality %, below the 3 quality %.

The 1st magnetic rings 61 is for being configured on the radial direction than baffle element 18 in the outer part so that cover ring the 1st magnetic portion of lifting near the periphery the limiting faces of baffle element 18.The 1st magnetic rings 61 top outer circumferential faces direct and baffle element 18 are provided with contiguously, combine through the outer circumferential face of complete all laser bonding with baffle element 18 tops.

The 2nd magnetic rings 62 is for being configured on the diametric(al) than the 1st magnetic rings 61 and non-magnetic ring 64 in the outer part so that cover ring the 2nd magnetic portion of the whole periphery of non-magnetic ring 64.The 2nd magnetic rings 62 directly disposes with the annular end face (circular top end face) by armature one side of the small diameter part of middle casing 19 contiguously, is combined in through complete all laser bonding on the circular top end face of middle casing 19.

The non-magnetic stainless steel (SUS304 etc.) that non-magnetic ring 64 is used as an example of non magnetic steel constitutes (formation).This non-magnetic ring 64 was arranged between interior week of periphery and the 2nd magnetic rings 62 of the 1st magnetic rings 61; Compare the 1st magnetic rings 61 outer sides on the radial direction so that coat the whole periphery of the 1st magnetic rings 61 for being configured in, and be configured in ratio the 2nd magnetic rings 62 inner sides on the radial direction so that coat non magnetic of the ring (magnetic resistance portion) in the whole interior week of the 2nd magnetic rings 62.

And, the magnetic resistance plug portion that non-magnetic ring 64 constitutes as magnetic resistance portion.That is, non-magnetic ring 64 prevents that magnetic flux from spilling (making magnetic flux be difficult to flow) between the 1st magnetic rings 61 and the 2nd magnetic rings 62, increases the magnetic attraction ground action of the magnetic pole strength of auxiliary stator 17 to the armature 14 of movable magnetic core.And, non-magnetic ring 64 have with the outer circumferential face of the 1st magnetic rings 61 relatively configuration inner peripheral surface and with the inner peripheral surface of the 2nd magnetic rings 62 outer circumferential face of configuration relatively.And non-magnetic ring 64 is combined on the outer circumferential face of the 1st magnetic rings 61 through complete all laser bonding.And non-magnetic ring 64 is combined on the inner peripheral surface of the 2nd magnetic rings 62 through complete all laser bonding.

As stated, baffle element 18, middle casing 19 and the upper body 20 that constitutes the electromagnetic driver housing is through airtight or liquid thickly seals with respect to armature containing space 41 with stator containing space 42 with the bottom: the face seal of complete all weld part P5 of the 2nd magnetic rings 62 of the 1st magnetic rings 61 of the 2nd magnetic rings 62 of the 1st magnetic rings 61 of auxiliary stator 17 and complete all weld part P1 of baffle element 18, auxiliary stator 17 and complete all weld part P2 of middle casing 19, auxiliary stator 17 and complete all weld part P3 of non-magnetic ring 64, auxiliary stator 17 and complete all weld part P4 of non-magnetic ring 64, middle casing 19 and upper body 20, the thickness of slab direction both sides of intermediate washer 33 and O type circle 52 etc.

< embodiment 1 effect >

Simple declaration has the effect of the such sparger of the electromagnetic driver that used present embodiment with the sparger of solenoid valve according to Fig. 1 to Fig. 4 below.

When the electromagnetic coil 12 of injector solenoid valve is switched on, produce electromagnetic force in the electromagnet by electromagnetic coil 12 and fixed magnetic core (main stator 16, auxiliary stator 17) formation.The electromagnetic force of this electromagnet is attracted to the armature 14 of movable magnetic core magnetic pole strength one side of auxiliary stator 17.So armature 14 moves to the direction (a direction side of axial direction) near the magnetic pole strength of auxiliary stator 17, armature 14 connects with the limiting faces of lifting of baffle element 18.Thus, the position of armature 14 is limited in lifting fully the position.

At this moment, in the pressure controling chamber 22 of the upstream side that leans on the fuel flow direction than valve 10, import fuel under high pressure from being total to rail through import and inlet side opening 25.And, lean on the fuel discharge route 27 in the downstream side of fuel flow direction to be communicated with fuel tank (low pressure one side of fuel system) through fuel discharge route and exhaust port 28 than valve 10.

Therefore; Because the pressure of fuel that leans on fuel flow direction upstream side than valve 10 is than leaning on the fuel pressure in fuel flow direction downstream side high than valve 10; Therefore along with the armature 14 of movable magnetic core to the top of axial direction one side shifting (lifting); Valve 10 leaves the valve seat of orifice plate 3, the outlet side opening 26 of open orifice plate 3.Therefore, the fuel that is full of of pressure controling chamber 22 inside is returned fuel tank from pressure controling chamber 22 via fuel flow path hole (comprising outlet side opening 26) → valve containing room → fuel discharge route 27 → fuel discharge route → exhaust port 28.

Follow the valve events of opening of above-mentioned solenoid valve self; Fuel pressures (acting on the oil pressure of the direction (closing the valve direction) that pushes away valve needle 5 downwards) in the pressure controling chamber 22 reduce, fuel hold the fuel pressure (acting on the oil pressure of the direction (valve opening position) that upwards pushes away valve needle 5) stayed in the chamber 21 greater than the thrust (acting on the thrust of the direction (closing the valve direction) that pushes away valve needle 5 downwards) of the oil pressure in the pressure controling chamber 22 and helical spring 23 with joint efforts.Thus, valve needle 5 leaves the valve seat (seat surface) of nozzle body 6, therefore open a plurality of spray-holes.That is, the valve body of fuel injection nozzle (valve needle 5) is driven valve, and pressure accumulation sprays in the firing chamber of each cylinder that is provided to motor in the fuel under high pressure that is total to rail inside.Thus, burner oil in the firing chamber of each cylinder of the past motor of beginning.

When beginning from injection timing, stop electromagnetic coil 12 energisings to solenoid valve through the instruction discharge time.So, the armature 14 of movable magnetic core moves to the direction away from the magnetic pole strength of auxiliary stator 17 under the thrust of helical spring 11, and valve 10 is pushed through on the valve seat of orifice plate 3.Thus, because outlet side opening 26 is blocked, therefore be filled in the pressure controling chamber 22 via fuel supply channel 24 and the fuel under high pressure that inlet side opening 25 is provided in the pressure controling chamber 22 from being total to rail.Follow in this; Fuel pressure in the pressure controling chamber 22 rises; Fuel pressures in the pressure controling chamber 22 add helical spring 23 thrust make a concerted effort hold the fuel pressure of staying in the chamber 21 greater than fuel, valve needle 5 is in place to the valve seat (seat surface) of nozzle body 6, therefore a plurality of spray-holes are by obturation.That is, the valve body of fuel injection nozzle (valve needle 5) closes valve, finishes burner oil in the past firing chamber of each cylinder of motor.

< embodiment 1 effect >

As stated; Used the such sparger of the electromagnetic driver of present embodiment with solenoid valve in order to improve the action response property of valve 10 and movable magnetic core, the material of the fixed magnetic core big to the effect of action response property (especially main stator 16) has used complex sintered magnetic material.This complex sintered magnetic material has and produces the little advantage of foucault current, but has intensity conversely and hardness is little and crisp such shortcoming.Therefore; The electromagnetic driver of present embodiment owing to disposed has ring the 1/ 2nd magnetic rings 61/62 that is made up of soft magnetic material and the auxiliary stator 17 of the ring non-magnetic ring 64 that is made up of non magnetic steel; So that cover the armature side end face of the main stator 16 of complex sintered magnetic material formation; Therefore fixed magnetic core (main stator 16, auxiliary stator 17) utilizes the armature 14 of the electromagnetic attracting force movable magnetic core of electromagnetic coil 12 generations; Even armature 14 contingency in movable magnetic core are impacted under the situation of fixed magnetic core, also can prevent the breakage of the fixed magnetic core (main stator 16) of complex sintered magnetic material system.

And for the inner space with the electromagnetic driver housing is divided into armature containing space 41 and stator containing space 42, the auxiliary stator 17 of present embodiment is arranged on the centre of armature containing space 41 and stator containing space 42.And the 1st magnetic rings 61 of auxiliary stator 17 is combined on the top outer circumferential face of the baffle element 18 that constitutes the electromagnetic driver housing through complete all laser bonding.And the 2nd magnetic rings 62 of auxiliary stator 17 is combined in through complete all laser bonding on the circular top end face of small diameter part of the middle casing 19 that constitutes the electromagnetic driver housing.And the non-magnetic ring 64 of auxiliary stator 17 is combined on the outer circumferential face of the 1st magnetic rings 61 through complete all laser bonding, and is combined on the inner peripheral surface of the 2nd magnetic rings 62 through complete all laser bonding.And the large diameter part of middle casing 19 is combined on the outer circumference side edge face of upper body 20 through complete all laser bonding.

And; Between the annular end face of the annular end face of the cylindrical part 31 of electromagnetic driver housing (especially ejector body 1) through intermediate washer 33 being clipped in ejector body 1 and the stepped part 32 of flange plate housing 4, the sealing surface of sealing surface and intermediate washer 33 that makes cylindrical part 31 is by face seal.And between the annular end face of the annular end face of the cylindrical part 31 through intermediate washer 33 being clipped in ejector body 1 and the stepped part 32 of flange plate housing 4, the sealing surface of sealing surface and flange 50 that makes intermediate washer 33 is by face seal.And, be inserted with the O type circle 52 of synthetic rubber system between upper body 20 and the wiring terminal 46.

Thus, baffle element 18, middle casing 19 and the upper body 20 that constitutes the electromagnetic driver housing thickly seals through accommodating the airtight or liquid of the stator containing space 42 of main stator 16 with the bottom with respect to the armature containing space 41 of accommodating armature 14 and fuel: the face seal of complete all weld part P5 of the 2nd magnetic rings 62 of the 1st magnetic rings 61 of the 2nd magnetic rings 62 of the 1st magnetic rings 61 of auxiliary stator 17 and complete all weld part P1 of baffle element 18, auxiliary stator 17 and complete all weld part P2 of middle casing 19, auxiliary stator 17 and complete all weld part P3 of non-magnetic ring 64, auxiliary stator 17 and complete all weld part P4 of non-magnetic ring 64, middle casing 19 and upper body 20, the thickness of slab direction both sides of intermediate washer 33 and O type circle 52 etc.

Thus, can guarantee tightness with respect to the stator containing space 42 of armature containing space 41.Even even under use has the situation of the fuel that corrosive fuel is full of in as armature containing space 41-for example using DME fuel (dimethyl ether fuel) or CNG gaseous fuel (Liquefied Natural Gas fuel), using under the situation of the fuel that contains the corrosivity composition; Owing to can guarantee tightness with respect to the stator containing space 42 of armature containing space 41, therefore have corrosive fuel directly with the complex sintered magnetic material that constitutes main stator 16 in the resin composition (resin-oatmeal etc.) that comprises or be housed in resin component (synthetic resin of coil-winding pipe 13, molded and shaped electromagnetic coil 12 (molding resin), plastic insulating bushing 51) and rubber components in the stator containing space 42 (being housed in the O type circle 52 of the interior synthetic rubber system of the wiring terminal through hole that is communicated with stator containing space 42 48) and contact.

Therefore; Because that can protect that the resin composition (resin-oatmeal etc.) that comprises in the complex sintered magnetic material that constitutes main stator 16 or resin component and rubber component do not receive to be full of in the armature containing space 41 for example has corrosive fuel corrosion, so can improve the durability of the main stator 16 that electromagnetic driver-especially is made up of complex sintered magnetic material.

[embodiment 2]

Fig. 5 is the figure of the expression embodiment of the invention 2, and Fig. 5 (a) and (b) are for having represented the figure of auxiliary stator (magnetic sheet).

The auxiliary stator 17 of the electromagnetic driver of present embodiment has directly ring the 1st magnetic portion (the 1st magnetic fixed body) 71 that the top outer circumferential face with baffle element 18 disposes contiguously, ring the 2nd magnetic portion (the 2nd magnetic fixed body) 72 that directly is provided with contiguously with the annular end face (circular top end face) by armature one side of the small diameter part of middle casing 19 and is arranged on the 1st magnetic portion 71 peripheries and the annular magnetic resistance part (non-magnetic fixed body) 74 between 72 interior weeks of the 2nd magnetic.

These the 1/ 2nd magnetic portions 71/72 and magnetic resistance portion 74 constitute by the integrated ring magnetic plate that forms of soft magnetic material.This magnetic sheet and embodiment 1 be the same to be used as the silicon steel that contains element silicon in the iron of soft magnetic material one example and to constitute (formation).The content that present embodiment uses element silicon is at (the 1LSS～3LSS) of the silicon steel more than the 1 quality %, below the 3 quality %.

And, be equivalent to the position of embodiment 1 the non-magnetic ring 64 that constitutes by non magnetic steel on the end face of armature one side leaning on of auxiliary stator (magnetic sheet) 17, be formed with ring depressed part (annular groove) 75.The thickness of slab (t) of this annular groove 75 through making magnetic resistance portion 74 is than 2 the 1/ 2nd magnetic portion 71/72 thin formation.In addition, the position of each planar end surface of the 1/ 2nd magnetic portion 71/72 of the end face that leans on main stator one side of auxiliary stator (magnetic sheet) 17-promptly and magnetic resistance portion 74 is on same plane.

In order to cover near the periphery the limiting faces of lifting of baffle element 18, the side that 71 configurations of the 1st magnetic portion are more outer than baffle element 18 diametrically is combined in through complete all laser bonding on the top outer circumferential face of baffle element 18.

The 2nd magnetic portion 72 is combined on the circular top end face of middle casing 19 through complete all laser bonding.

Magnetic resistance portion 74 is the thinner wall section of the thin thickness of 2 1/ 2nd magnetic portions 71/72 of thickness ratio.That is, 2 the 1/ 2nd magnetic portions 71/72 of the thickness of slab of magnetic resistance portion 74 (t) ratio is thin.Thus, because the thin-walled magnetic resistance piston part that magnetic resistance portion 74 constitutes in the magnetic loop can prevent that magnetic flux from spilling (making magnetic flux be difficult to flow) between the 1st magnetic portion 71 and the 2nd magnetic portion 72, increase the magnetic attraction of the magnetic pole strength of auxiliary stator 17 to armature 14.

As stated; The auxiliary stator of the electromagnetic driver of present embodiment (magnetic sheet) 17 usefulness soft magnetic materials make auxiliary stator 17 become parts; Part at the non-magnetic ring 64 that is made up of non magnetic steel that is equivalent to embodiment 1 forms annular groove 75, makes magnetic resistance portion 74 be thin-walled magnetic resistance piston part.Thus, compare the place that to reduce the complete all laser bonding of enforcement with embodiment 1, therefore can reduce the manufacture cost of manufacture cost, the especially auxiliary stator (magnetic sheet) 17 of electromagnetic driver.

[embodiment 3]

Fig. 6 and Fig. 7 are the figure of the expression embodiment of the invention 3, and Fig. 6 (a) and (b) and Fig. 7 are the figure of expression auxiliary stator (magnetic+non magnetic plate).

The electromagnetic driver of putting down in writing in the TOHKEMY 2004-88891 communique is because armature one side of leaning on of the main stator of, the complex sintered magnetic material system that can obtain high action response property little in eddy current losses disposes the auxiliary stator of soft magnetic material system, therefore exists the eddy current losses of auxiliary stator to cause the problem of action response property variation.

Therefore; The auxiliary stator of the electromagnetic driver of present embodiment (magnetic+non magnetic plate) 17 forms many radial the 1/ 2nd slits 66/67 from the interior perimembranous (inner peripheral surface) of auxiliary stator 17 to the straight extension of peripheral part (outer circumferential face) of auxiliary stator 17, and the edge circumferentially is divided into a plurality of (16) with auxiliary stator 17.

A plurality of the 1st slits 66 are formed on leaning on the end face of main stator one side of the ring auxiliary stator (magnetic+non magnetic plate) 17 that is made up of the 1/ 2nd magnetic rings 61/62 and non-magnetic ring 64; Said the 1/ 2nd magnetic rings 61/62 is made up of soft magnetic material, and said non-magnetic ring 64 is made up of non magnetic steel.And a plurality of the 2nd slits 67 are formed on leaning on the end face of armature one side of auxiliary stator (magnetic+non magnetic plate) 17.

The 1st slit 66 and the 2nd slit 67 are arranged on the auxiliary stator 17 with equal spacing with staggering mutually; When radially outer of auxiliary stator 17 looked the outer circumferential face of auxiliary stator 17 sideways, between 2 the 1st adjacent slits 66, be provided with from the 2nd slit 67 of the direction otch opposite with these the 1st slits 66.

In addition, the 1st slit 66 with predetermined interval (uniformly-spaced, for example 45 ° of intervals) circumferentially being formed with of the end face upper edge auxiliary stator 17 that leans on main stator one side of auxiliary stator 17 a plurality of (8).And, the 2nd slit 67 with predetermined interval (uniformly-spaced, for example 45 ° of intervals) circumferentially being formed with of the end face upper edge auxiliary stator 17 that leans on armature one side of auxiliary stator 17 a plurality of (8).

And the degree of depth { D (S1) } in each the 1st slit 66 is the thickness that does not run through auxiliary stator 17 along the thickness of slab direction, and the degree of depth { D (S2) } in each the 2nd slit 67 is not for running through the thickness of auxiliary stator 17 along the thickness of slab direction.

And the degree of depth { D (S1) } in each the 1st slit 66 is at least thickness of slab (T) over half of auxiliary stator 17, and the degree of depth { D (S2) } in each the 2nd slit 67 is at least thickness of slab (T) over half of auxiliary stator 17.That is, has overlapping (D (S1)+D (S2)＞T) between the degree of depth { D (S2) } in the degree of depth in the 1st slit 66 { D (S1) } and the 2nd slit 67.

As stated; The 1/ 2nd slit 66/67 of the radiation shape that staggers mutually is set on the both ends of the surface of the auxiliary stator 17 that the electromagnetic driver of present embodiment constitutes through non-magnetic ring 64 grades that constitute at the 1/ 2nd magnetic rings 61/62 that is made up of soft magnetic material and non magnetic steel (lean on the end face of main stator one side and lean on the end face of armature one side); Compare with the auxiliary stator that does not form slot type (embodiment 1) (magnetic+non magnetic plate) 17; Because the path of foucault current is elongated; Therefore the resistance of foucault current increases, and can reduce the eddy current losses of auxiliary stator 17.

And; The degree of depth { D (S1), D (S2) } through making 1/ 2nd slits 66/67 can prevent that in more than 1/2 of thickness of slab (plate thickness T) of auxiliary stator (magnetic+non magnetic plate) 17 (for example about 2/3 the degree of depth) each the 1/ 2nd magnetic rings 61/62 circumferential cross section that terminates in auxiliary stator (magnetic+non magnetic plate) 17 becomes complete all magnetic circuits.Promptly; Use solenoid valve even used the such sparger of electromagnetic driver that leans on armature one side to dispose to contain the auxiliary stator (magnetic+non magnetic plate) 17 that soft magnetic material constitutes of the main stator 16 of little in eddy current losses, as can to obtain high action response property complex sintered magnetic material system; Because the path of foucault current is elongated in auxiliary stator (magnetic+non magnetic plate) 17; Therefore the resistance of foucault current increases; When the driving current that offers electromagnetic coil 12 cut off, the foucault current that produces in the 1/ 2nd magnetic rings 61/62 of auxiliary stator 17 diminished.

Thus, need not increase the external diameter of the coil of electromagnetic coil 12, promptly need not make of the radially maximization of the bodily form of electromagnetic driver, just can increase the magnetic attraction of fixed magnetic core (main stator 16, auxiliary stator 17) the armature 14 of movable magnetic core to coil.Therefore, can improve the action response property of armature 14 grades of valve 10 and the electromagnetic driver of solenoid valve.

[embodiment 4]

Fig. 8 and Fig. 9 are the figure of the expression embodiment of the invention 4, and Fig. 8 is the figure of expression auxiliary stator (magnetic sheet), and Fig. 9 is the plotted curve of the waveform of expression magnetic attraction.

The auxiliary stator of the electromagnetic driver of present embodiment (magnetic sheet) 17 forms many radial the 1st slits 76 from the interior perimembranous (inner peripheral surface) of the 1st magnetic portion 71 to the straight extension of peripheral part (outer circumferential face) of the 1st magnetic portion 71; And form many radial the 2nd slits 77, along circumferentially each the 1/ 2nd magnetic portion 71/72 of auxiliary stator 17 being divided into a plurality of (16) from the interior perimembranous (inner peripheral surface) of the 2nd magnetic portion 72 to the straight extension of peripheral part (outer circumferential face) of the 2nd magnetic portion 72.In addition, the thickness of slab of magnetic resistance portion 74 (t) is thinner than 2 the 1/ 2nd magnetic portions 71/72.

A plurality of the 1/ 2nd slits 76/77 are formed at the leaning on the end face of armature one side of each the 1/ 2nd magnetic rings 71/72 of the ring auxiliary stator (magnetic sheet) 17 that is made up of soft magnetic material that has disposed magnetic resistance portion 74 and annular groove 75 between 2 the 1/ 2nd magnetic rings 71/72.

And the degree of depth in each the 1st slit 76 is not for to run through the thickness of the 1st magnetic portion 71 of auxiliary stator 17 along the thickness of slab direction, and the degree of depth in each the 2nd slit 77 is not for to run through the thickness of the 2nd magnetic portion 72 of auxiliary stator 17 along the thickness of slab direction.

And the degree of depth in each the 1st slit 76 is at least thickness of slab (T) over half of auxiliary stator 17, and with the degree of depth of annular groove 75 more than equal.

As stated; The electromagnetic driver of present embodiment is through the 1/ 2nd slit 76/77 that radiation shape is set on the end face of armature one side of leaning in each the 1/ 2nd magnetic portion 71/72 of the ring auxiliary stator 17 that is made up of soft magnetic material; Said auxiliary stator 17 has disposed magnetic resistance portion 74 and annular groove 75 between 2 the 1/ 2nd magnetic rings 71/72; Compare with the auxiliary stator (magnetic sheet) 17 that does not form slot type (embodiment 2); Because the path of foucault current is elongated, so the resistance of foucault current increases, and can reduce the eddy current losses of auxiliary stator 17.

And; The degree of depth through making 1/ 2nd slits 76/77 is in more than 1/2 of auxiliary stator (magnetic sheet) 17 thicknesss of slab (plate thickness T) (for example about 2/3 the degree of depth); And with the degree of depth of annular groove 75 more than equal, can prevent that the circumferential cross section of auxiliary stator 17 from becoming complete all magnet passages.Promptly; Use solenoid valve even used the such sparger of electromagnetic driver that leans on armature one side to dispose the auxiliary stator (magnetic sheet) 17 that constitutes by soft magnetic material of the main stator 16 of little in eddy current losses, as can to obtain high action response property complex sintered magnetic material system; Because the path of foucault current is elongated in auxiliary stator (magnetic sheet) 17; Therefore the resistance of foucault current increases, and when the driving current that offers electromagnetic coil 12 cut off, the foucault current that produces in the auxiliary stator 17 diminished.

Thus, need not increase the coil outer diameter of electromagnetic coil 12, promptly need not make of the radially maximization of the bodily form of electromagnetic driver, just can increase the magnetic attraction of fixed magnetic core (main stator 16, auxiliary stator 17) the armature 14 of movable magnetic core to coil.Therefore, can improve the action response property of armature 14 grades of valve 10 and the electromagnetic driver of solenoid valve.

Can publish from the plotted curve of Fig. 9; Compare with the auxiliary stator 17 that does not form slot type (embodiment 2), the auxiliary stator 17 that as present embodiment, has formed 1/ 2nd slits 76/77 has improved the magnetic attraction of fixed magnetic core (main stator 16, auxiliary stator 17) to the armature 14 of movable magnetic core.

[embodiment 5]

Figure 10 and Figure 11 are the figure of the expression embodiment of the invention 5, and Figure 10 is the figure of the electromagnetic driver of expression sparger, and Figure 11 (a) is for having represented the figure of auxiliary stator (magnetic+non magnetic plate), and Figure 11 (b) is for having represented the figure of magnetic sheet.

Even the external diameter of the electromagnetic coil of electromagnetic driver electromagnetic coil of putting down in writing in the TOHKEMY 2004-88891 communique with plug type movable magnetic core and the electromagnetic driver with plate movable magnetic core (embodiment 1～4) is the same, the magnetic attraction that acts between movable magnetic core and the fixed magnetic core is also little.Therefore, be necessary to increase the external diameter (coil diameter) of electromagnetic coil.And; If increase jet pressure to internal-combustion engine (motor) burner oil; Then need bigger helical spring thrust,, be necessary further to increase the external diameter (coil diameter) of electromagnetic coil in order to obtain to overcome the attraction force of this helical spring thrust to the promotion of full cut-off direction.

As stated; If the external diameter that makes electromagnetic coil for the such purpose of magnetic attraction that reaches the electromagnet that increase is made up of electromagnetic coil and fixed magnetic core etc. is bigger than existing technology; Then the bodily form of electromagnetic driver (size radially) becomes excessive, has the problem carry the lift-launch property variation on the motor etc.

Therefore; Thereby, adopt and used Figure 10 and the such sparger of electromagnetic driver shown in Figure 11 to use solenoid valve even can not make the mounting type variation, can reduce the purpose that eddy current losses improves action response property in order to reach adopting the plug type movable magnetic core to replace also can to stop electromagnetic coil 12 to maximize under the situation of plate movable magnetic core.

In order to realize that fuel does not leak, the sparger of present embodiment is for directly driving the sparger of the so-called direct drive mode of valve needle with electromagnetic driver.This sparger has injector body and the electromagnetic driver (with reference to Figure 13) of direct driving as the valve needle 55 of the valve body of this injector body.

The housing of injector body is made up of ejector body (injector body) 56 and nozzle body 57, and they are through locking nut 58 fastening being combined into one.Ejector body 56 is provided with coaxial through hole with nozzle body 57, and elongated valve needle 55 is housed in (with reference to Figure 13) in these through holes.

In the diagram bottom of ejector body 56, be formed with the spring containing space 29 of accommodating helical spring 59, valve needle 55 receives the thrust of helical spring 59 always to be pushed to the diagram below.

And,, dispose the spacer block 78 that forms spring containing space 29 bottoms in the diagram lower end of ejector body 56.The nozzle body 57 that these spacer block 78 usefulness are born the fastening axial force of locking nut 58 is installed in the diagram bottom of ejector body 56.

At the diagram upside of ejector body 56, be formed with from entering the mouth 79 the 1st fuel supply channels 81 that provide the fuel under high pressure of coming to import to be formed on the gap that forms between valve needle 55 and the through hole and will provide the fuel under high pressure of coming to import the 2nd fuel supply channel 82 in the armature containing space 41 by the 1st fuel supply channel 81.

Import to valve needle 55 fuel under high pressure on every side from the 1st fuel supply channel 81; Be imported in the nozzle box 83 that forms between through hole and the valve needle 55 of nozzle body 57; When valve needle 55 rises (lifting fully), from the spray-hole that nozzle body 57 forms, spray.

The 2nd housing 85 and intermediate washer 86 are being clipped under the state between ejector body 56 and the 1st housing 84; Through the cylindrical part (thinner wall section) 88 of the 1st housing 84 is tightened on the periphery of the cylindrical part 87 that is fixed on ejector body 56, injector body and electromagnetic driver are combined into an integral body.

Electromagnetic driver has: the electric power of accepting to provide produces the electromagnetic coil 12 of electromagnetic force (magnetic attraction); The plug type movable magnetic core (armature 14) that valve needle 55 is moved back and forth along its axial direction; And separate the predetermined gap fixed magnetic core (main stator 16, auxiliary stator 17) of configuration relatively between this armature 14; Housing with the inner space (armature containing space 41, stator containing space 42 etc.) of accommodating armature 14, main stator 16 and auxiliary stator 17; The damping mechanism that utilizes the flow resistance of the fuel that is full of in the armature containing space 41 that the action of armature 14 is slowed down.

The housing of electromagnetic driver is by constituting with the bottom: fastening cylindrical part 87 peripheries that are fixed on ejector body 56 by what non magnetic steel constituted round-ended cylinder shape the 1st housing 84 arranged; What have inner space (armature containing space 41 with stator containing space 42 etc.) has round-ended cylinder shape the 2nd housing 85 by what soft magnetic material (soft magnetic material) constituted; And the intermediate washer 86 that is clipped between the annular end face of annular end face and the 2nd housing 85 of ejector body 56, constitutes by nonmagnetic substance.

In the thinner wall section 88 of the 1st housing 84, be formed with the internal thread part on the periphery screw section of the cylindrical part 87 that is screwed to ejector body 56.In addition, between the periphery of the cylindrical part (thinner wall section) 90 of interior Zhou Yudi 2 housings 85 of the cylindrical part (heavy section) 89 of the 1st housing 84, be formed with the solenoid coil containing space 43 of accommodating electromagnetic coil 12.The electromagnetic coil 12 usefulness synthetic resin (molding resin) of in coil containing space 43, reeling in addition, are molded and shaped.

The fixed magnetic core of electromagnetic driver has the main stator that is made up of complex sintered magnetic material 16 and comprises auxiliary stator 17 that soft magnetic material constitutes etc.

Main stator 16 forms cylindric, surrounds to be pressed into the periphery that is fixed on the middle real cylindrical pin 91 in the 2nd housing 85.

For the inner space with the 2nd housing 85 is divided into armature containing space 41 and stator containing space 42, auxiliary stator 17 is arranged on the centre of armature containing space 41 and stator containing space 42.This auxiliary stator 17 is by constituting with the bottom: the circular plate type magnetic portion (magnetic sheet) 63 that is made up of soft magnetic material; And be configured in the outside radially of this magnetic sheet 63, non magnetic (non-magnetic ring) 64 of ring etc.

Magnetic sheet 63 inner peripheral surfaces direct and non-magnetic ring 64 dispose contiguously, are combined on the inner peripheral surface of non-magnetic ring 64 through complete all laser bonding.

The auxiliary stator 17 of present embodiment is formed with many radial the 1/ 2nd slits 66/67 from the central part of magnetic sheet 63 to the straight extension of peripheral part (outer circumferential face) of magnetic sheet 63, along circumferentially auxiliary stator 17 being divided into a plurality of (16).

Many articles the 1st slits 66 are formed on leaning on the end face of main stator one side of the magnetic sheet 63 that is made up of soft magnetic material.And many articles the 2nd slits 67 are formed on leaning on the end face of armature one side of magnetic sheet 63.

With equal spacing the 1st slit 66 and the 2nd slit 67 are set on magnetic sheet 63 with staggering mutually; When leaning on radially outer to look the outer circumferential face of auxiliary stator 17 sideways from the ratio magnetic sheet of auxiliary stator 17 63, between 2 the 1st adjacent slits 66, be provided with from the 2nd slit 67 of the direction otch opposite with these the 1st slits 66.

In addition, the 1st slit 66 with predetermined interval (uniformly-spaced, for example 45 ° of intervals) circumferentially being formed with of the end face upper edge auxiliary stator 17 that leans on main stator one side of magnetic sheet 63 a plurality of (8).And, the 2nd slit 67 with predetermined interval (uniformly-spaced, for example 45 ° of intervals) circumferentially being formed with of the end face upper edge auxiliary stator 17 that leans on armature one side of magnetic sheet 63 a plurality of (8).

And; The same with embodiment 3; The degree of depth { D (S1) } in each the 1st slit 66 is the thickness that does not run through the magnetic sheet 63 of auxiliary stator 17 along the thickness of slab direction, and the degree of depth { D (S2) } in each the 2nd slit 67 is not for running through the thickness (with reference to Fig. 7) of the magnetic sheet 63 of auxiliary stator 17 along the thickness of slab direction.And the degree of depth { D (S1) } in each the 1st slit 66 is at least thickness of slab (T) over half of auxiliary stator 17, and the degree of depth { D (S2) } in each the 2nd slit 67 is at least thickness of slab (T) over half of auxiliary stator 17.That is, have overlapping (with reference to Fig. 7) between the degree of depth { D (S2) } in the degree of depth in the 1st slit 66 { D (S1) } and the 2nd slit 67.

Non-magnetic ring 64 is provided with along the outer circumferential face ground that circumferentially surrounds magnetic sheet 63.This non-magnetic ring 64 forms circular, so that be blocked in many articles the 1/ 2nd slits 66/67 of the outer circumferential face opening of magnetic sheet 63.And non-magnetic ring 64 directly is provided with the inner peripheral surface of the thinner wall section 90 of the 2nd housing 85 contiguously, is bonded to through complete all laser bonding on the inner peripheral surface of thinner wall section 90 of the 2nd housing 85.In addition; The same with embodiment 1～4; The non-magnetic ring 64 that constitutes magnetic resistance portion is between the interior week for the thinner wall section 90 of the periphery that is arranged on magnetic sheet 63 and the 2nd housing 85; Prevent that magnetic flux from spilling (making magnetic flux be difficult to flow through) between magnetic sheet 63 and the 2nd housing 85, increase the magnetic resistance piston part of the magnetic pole strength of auxiliary stator 17 magnetic attraction of armature 14.

The movable magnetic core of electromagnetic driver has and leaning on of auxiliary stator 17 separates predetermined gap between the end face (magnetic pole strength) of armature one side and dispose relatively, the armature 14 that is made up of soft magnetic material.

Armature 14 is pressed into the upper end portion of chimeric valve needle 55.The ring circular protrusion 92 that this armature 14 has when armature 14 lifts fully on the end face of its auxiliary stator one side and the end face that leans on armature one side of non-magnetic ring 64 connects.This circular protrusion 92 is outstanding to the end face that leans on armature one side of the non-magnetic ring 64 of auxiliary stator 17 from the outer circumferential face of the end face that leans on auxiliary stator one side of armature 14.

Armature containing space 41 is a cylindrical space, between the wall (by the end face of armature one side) of the spy of the wall of the spy that is formed on ejector body 56 in the armature containing space 41 and auxiliary stator 17 in the armature containing space 41.The peripheral part of this armature containing space 41 is covered to the wall (inner peripheral surface) in the armature containing space 41 by the spy of the 2nd housing 85 and intermediate washer 86.And; Armature containing space 41 have be formed on than circular protrusion 92 lean on radially the inboard and at the end face that leans on armature one side of the magnetic sheet 63 of auxiliary stator 17 and the cylindrical shape inner space 93 between the end face of auxiliary stator one side that leans on of armature 14, and be formed on than circular protrusion 92 by radially the outside and the cylindrical shape outer space 94 between the inner peripheral surface of the outer circumferential face radially of armature 14 and the 2nd housing 85.

And; The stator containing space 42 of present embodiment is a cylindrical space, between the wall of the spy of the wall (leaning on the end face of main stator one side) of the spy that is formed on auxiliary stator 17 in the stator containing space 42 and the 2nd housing 85 in the stator containing space 42 (bottom surface, by the end face of main stator one side).The interior perimembranous of this stator containing space 42 is covered to the wall (outer circumferential face) in the stator containing space 42 by the spy of pin 91.And the peripheral part of stator containing space 42 is covered to the wall (inner peripheral surface) in the stator containing space 42 by the spy of the 2nd housing 85.

As stated; The 1/ 2nd housing 84/85 that constitutes the electromagnetic driver housing is through the magnetic sheet 63 of auxiliary stator 17 and complete all weld part P6 and the non-magnetic ring 64 of auxiliary stator 17 and complete all weld part P7 of the 2nd housing 85 etc. of non-magnetic ring 64, will accommodate the airtight or liquid of the stator containing space 42 of main stator 16 with respect to the armature containing space 41 of accommodating armature 14 and fuel and thickly seal.

The damping mechanism of present embodiment has the fuel that is full of in the circular protrusion 92, armature containing space 41 of non-magnetic ring 64, the armature 14 of auxiliary stator 17, and the gap 95 that is communicated with inner space 93 and outer space 94.This gap 95 be formed on auxiliary stator 17 non-magnetic ring 64 the end face that leans on armature one side and armature 14 circular protrusion 92 by between the end face (end face) of auxiliary stator one side.

Thus; When armature 14 lifts fully; Armature 14 be about to arrive lift the position fully before; The flow resistance (oily close damping function) of the fuel that produces when utilizing the fuel that is full of in the inner space 93 through gap 95 inflow outer space, 94 1 sides between the circular protrusion 92 of the non-magnetic ring 64 that is formed on auxiliary stator 17 and armature 14 slows down the action of armature 14.Thus, the striking velocity of the non-magnetic ring 64 of the circular protrusion 92 percussive assist stators 17 of armature 14 slows down, and therefore can suppress the vibration of armature 14.

As stated; The electromagnetic driver of present embodiment is through being provided with the 1/ 2nd slit 66/67 of the radiation shape that staggers mutually on the both ends of the surface of auxiliary stator 17 (lean on the end face of main stator one side and lean on the end face of armature one side); Said auxiliary stator 17 is made up of soft magnetic material magnetic sheet 63 that constitutes and the non-magnetic ring 64 that non magnetic steel constitute; Compare with the auxiliary stator that does not form slot type (embodiment 1) (magnetic+non magnetic plate) 17; Because the path of foucault current is elongated, so the resistance of foucault current increases, and can reduce the eddy current losses of auxiliary stator 17.

And; The degree of depth { D (S1), D (S2) } through making 1/ 2nd slits 66/67 is in more than 1/2 of auxiliary stator (magnetic+non magnetic plate) 17 thicknesss of slab (plate thickness T) (for example about 2/3 the degree of depth), can prevent to become complete all magnetic circuits in the circumferential cross section of the magnetic sheet 63 of auxiliary stator (magnetic+non magnetic plate) 17.Promptly; Use solenoid valve even used the such sparger of electromagnetic driver that leans on armature one side to dispose to contain the auxiliary stator (magnetic+non magnetic plate) 17 that soft magnetic material constitutes of the main stator 16 of little in eddy current losses, as can to obtain high action response property complex sintered magnetic material system; Because the path of foucault current is elongated in auxiliary stator (magnetic+non magnetic plate) 17; Therefore the resistance of foucault current increases; When the driving current that offers electromagnetic coil 12 cut off, the foucault current that produces in the magnetic sheet 63 of auxiliary stator 17 diminished.

Thus, need not increase the external diameter of the coil of electromagnetic coil 12, the bodily form of electromagnetic driver is maximized to the diametric(al) of coil, just can increase the magnetic attraction of fixed magnetic core (main stator 16, auxiliary stator 17) the armature 14 of movable magnetic core.Therefore, can improve the action response property of armature 14 grades of valve 10 and the electromagnetic driver of solenoid valve.

And; Even adopting plug type armature 14 to replace under the situation of plate armature 14; Can not make lift-launch property variation thereby can stop electromagnetic coil 12 to maximize yet; Therefore eddy current losses can be reduced, the action response property of armature 14 grades of valve 10 and the electromagnetic driver of solenoid valve can be improved.

[variation]

Though present embodiment has been used to use the sparger of electromagnetic driver to use solenoid valve electromagnetic driver of the present invention; But so long as let fuel pass through inner solenoid valve; Not only can be used for moving bodys such as valve, also can be used on 2 positions, driving the electromagnetic driver of moving bodys such as shutter or door.And, can also adopt the electromagnetic type control valve for fluids that has used electromagnetic driver of the present invention.As the electromagnetic type control valve for fluids that has used electromagnetic driver, have the solenoid valve (fuel amount adjusting valve) of supply pump or altogether such the having of reduction valve of rail can perhaps be classified to change the electromagnetic type control valve for fluids of electromagnetic driver of the position of moving bodys such as valve continuously.

Return the type sparger though present embodiment is used for when solenoid valve is opened carrying out the next door that fuel discharges from the exhaust port 28 of the shoulder that is screwed to ejector body 1 as fuel injection valve for IC engines (sparger), also can be used for when solenoid valve is opened carrying out the top that fuel discharges as sparger and return the type sparger from the top reflow pipe that is arranged on upper body 20.

In addition, the present invention is not limited to the foregoing description, can carry out various distortion according to aim of the present invention, and they also are not precluded within outside the scope of the present invention.

Claims (16)

1. electromagnetic driver; Has the movable magnetic core (14,15) that (a) drives moving body (10); (b) the relative fixed magnetic core (16,17) that disposes with this movable magnetic core (14,15); (c) have the housing (2～4,18～20,33,84～86) of the inner space of accommodating above-mentioned movable magnetic core (14,15) and said fixing magnetic core (16,17), and (d) be maintained at this housing (2～4,18～20,33,84～86) inside, accept electric power supply, make the coil (12) that produces magnetic attraction between above-mentioned movable magnetic core (14,15) and the said fixing magnetic core (16,17); It is characterized in that:

Said fixing magnetic core (16,17) has by metal powder and resin-oatmeal being solidified the main stator (16) that the composite magnetic that forms forms, and disposes relatively with the end face by movable magnetic core one side of this main stator (16), comprises soft magnetic material and the auxiliary stator (17) that constitutes;

Above-mentioned auxiliary stator (17), the 2nd space that the inner space of above-mentioned housing (2～4,18～20,33,84～86) is divided into the 1st space (41) of accommodating above-mentioned movable magnetic core (14,15) and accommodates above-mentioned main stator (16) (42), be set at the centre in above-mentioned the 1st space (41) and above-mentioned the 2nd space (42);

Above-mentioned housing (2～4,18～20,33) has to be configured in than above-mentioned main stator (16) and leans on inboard radially so that cover bottom tube-like the 1st metal tube (18) being arranged and be configured in than above-mentioned main stator (16) and leaning on radially the outside so that cover tubular the 2nd metal tube (19) of the whole periphery of above-mentioned main stator (16) of week in above-mentioned main stator (16) whole;

Above-mentioned the 1st metal tube (18) is formed by nonmagnetic metal, constitutes as the baffle element that lifts the position fully that limits above-mentioned movable magnetic core (14,15);

Above-mentioned auxiliary stator (17) has annular the 1st magnetic portion (61,71) that is provided with contiguously with above-mentioned the 1st metal tube (18), and annular the 2nd magnetic portion (62,72) that is provided with contiguously with above-mentioned the 2nd metal tube (19);

Above-mentioned the 1st magnetic portion (61,71) is engaged with on above-mentioned the 1st metal tube (18) through full week welding; Above-mentioned the 2nd magnetic portion (62,72) is engaged with on above-mentioned the 2nd metal tube (19) through full week welding;

Above-mentioned housing (2～4,18～20,33,84～86) is through airtight or liquid thickly seals with respect to above-mentioned the 1st space (41) with above-mentioned the 2nd space (42) with the weld part of above-mentioned auxiliary stator (17).

2. electromagnetic driver as claimed in claim 1 is characterized in that:

Above-mentioned auxiliary stator (17) has the magnetic resistance portion (64) that forms with nonmagnetic substance between the interior week of the periphery of above-mentioned the 1st magnetic portion (61) and above-mentioned the 2nd magnetic portion (62);

Above-mentioned magnetic resistance portion (64) is engaged with in above-mentioned the 1st magnetic portion (61) through full week welding, and is engaged with in above-mentioned the 2nd magnetic portion (62) through full week welding.

3. electromagnetic driver as claimed in claim 1 is characterized in that:

Above-mentioned auxiliary stator (17) has the magnetic resistance portion (74) that is formed by soft magnetic material between the interior week of the periphery of above-mentioned the 1st magnetic portion (71) and above-mentioned the 2nd magnetic portion (72);

Above-mentioned magnetic resistance portion (74) is the thin thinner wall section of above-mentioned the 1st magnetic portion (71) of thickness ratio and above-mentioned the 2nd magnetic portion (72).

4. like claim 2 or 3 described electromagnetic drivers, it is characterized in that:

Above-mentioned movable magnetic core (14,15) have and above-mentioned auxiliary stator (17) between devices spaced apart and the relative armature (14) of configuration;

Leaning on the end face of main stator one side of above-mentioned auxiliary stator (17), be formed with radial the 1st slit (66) that a plurality of interior perimembranous from above-mentioned auxiliary stator (17) extend to the peripheral part of above-mentioned auxiliary stator (17);

Leaning on the end face of armature one side of above-mentioned auxiliary stator (17), be formed with radial the 2nd slit (67) that a plurality of interior perimembranous from above-mentioned auxiliary stator (17) extend to the peripheral part of above-mentioned auxiliary stator (17).

5. electromagnetic driver as claimed in claim 4 is characterized in that:

Above-mentioned the 1st slit (66) and above-mentioned the 2nd slit (67) are arranged on the above-mentioned auxiliary stator (17) with staggering mutually, with box lunch when above-mentioned auxiliary stator (17) is seen in the outside radially of above-mentioned auxiliary stator (17), between adjacent 2 above-mentioned the 1st slits (66), be provided with above-mentioned the 2nd slit (67) at the direction otch opposite with these the 1st slits (66).

6. electromagnetic driver as claimed in claim 4 is characterized in that:

The degree of depth of above-mentioned auxiliary stator (17) is not run through in above-mentioned the 1st slit (66) for the thickness of slab direction along above-mentioned auxiliary stator (17);

The degree of depth of above-mentioned auxiliary stator (17) is not run through in above-mentioned the 2nd slit (67) for the thickness of slab direction along above-mentioned auxiliary stator (17);

The degree of depth in above-mentioned the 1st slit (66) is at least thickness of slab over half of above-mentioned auxiliary stator (17);

The degree of depth in above-mentioned the 2nd slit (67) is at least thickness of slab over half of above-mentioned auxiliary stator (17).

7. like claim 2 or 3 described electromagnetic drivers, it is characterized in that:

Above-mentioned movable magnetic core (14,15) have and above-mentioned auxiliary stator (17) between the relative armature (14) of configuration of devices spaced apart;

Leaning on the end face of armature one side of above-mentioned auxiliary stator (17), be formed with the radial slit (67,76,77) that a plurality of interior perimembranous from above-mentioned auxiliary stator (17) extend to the peripheral part of above-mentioned auxiliary stator (17).

8. electromagnetic driver as claimed in claim 7 is characterized in that:

The degree of depth of above-mentioned auxiliary stator (17) is not run through in above-mentioned slit (67,76,77) for the thickness of slab direction along above-mentioned auxiliary stator (17);

The degree of depth in above-mentioned slit (67,76,77) is at least thickness of slab over half of above-mentioned auxiliary stator (17).

9. electromagnetic driver as claimed in claim 1 is characterized in that:

Above-mentioned movable magnetic core (14,15) have and above-mentioned auxiliary stator (17) between the relative armature (14) of configuration of devices spaced apart;

The magnetic resistance portion (64) that above-mentioned auxiliary stator (17) has magnetic portion (63) that the end face central part that leans on armature one side with above-mentioned main stator (16) is oppositely arranged and is oppositely arranged with the peripheral part of the end of leaning on armature one side of above-mentioned main stator (16);

Above-mentioned magnetic portion (63) is engaged with in the above-mentioned magnetic resistance portion (64) through full week welding, and above-mentioned the 2nd space (42) is sealed with respect to above-mentioned the 1st space (41) airtightly;

Above-mentioned magnetic resistance portion (64) is engaged with on the above-mentioned housing (84～86) through full week welding, and above-mentioned the 2nd space (42) is sealed with respect to above-mentioned the 1st space (41) airtightly.

10. electromagnetic driver as claimed in claim 9 is characterized in that:

Leaning on the end face of main stator one side of above-mentioned magnetic portion (63), be formed with radial the 1st slit (66) of a plurality of peripheral parts that extend to above-mentioned magnetic portion (63) from the interior perimembranous or the central part of above-mentioned magnetic portion (63);

Leaning on the end face of armature one side of above-mentioned magnetic portion (63), be formed with radial the 2nd slit (67) of a plurality of peripheral parts that extend to above-mentioned magnetic portion (63) from the interior perimembranous or the central part of above-mentioned magnetic portion (63).

11. electromagnetic driver as claimed in claim 10 is characterized in that:

Above-mentioned the 1st slit (66) and above-mentioned the 2nd slit (67) are arranged in the above-mentioned magnetic portion (63) with staggering mutually; When above-mentioned magnetic portion (63) is seen in the outside radially of above-mentioned magnetic portion (63), between adjacent 2 above-mentioned the 1st slits (66), be provided with above-mentioned the 2nd slit (67) with box lunch at the direction otch opposite with these the 1st slits (66).

12., it is characterized in that like claim 10 or 11 described electromagnetic drivers:

The degree of depth of above-mentioned magnetic portion (63) is not run through for the thickness of slab direction along above-mentioned magnetic portion (63) in above-mentioned the 1st slit (66);

The degree of depth of above-mentioned magnetic portion (63) is not run through for the thickness of slab direction along above-mentioned magnetic portion (63) in above-mentioned the 2nd slit (67);

The degree of depth in above-mentioned the 1st slit (66) is at least thickness of slab over half of above-mentioned magnetic portion (63);

The degree of depth in above-mentioned the 2nd slit (67) is at least thickness of slab over half of above-mentioned magnetic portion (63).

13., it is characterized in that like claim 10 or 11 described electromagnetic drivers:

Has the damping mechanism (64,92,95) that the flow resistance of utilizing the fuel that is full of in above-mentioned the 1st space (41) slows down the action of above-mentioned movable magnetic core (14,15).

14. electromagnetic driver as claimed in claim 13 is characterized in that:

Above-mentioned auxiliary stator (17) has along the annular non magnetic portion of the above-mentioned magnetic resistance of the formation portion of the outer circumferential face that circumferentially surrounds above-mentioned magnetic portion (63);

Above-mentioned movable magnetic core (14,15) has when above-mentioned movable magnetic core (14,15) when lifting fully and above-mentioned non magnetic circular protrusion that connects (92) on it leans on the end face of auxiliary stator one side;

Above-mentioned the 1st space (41) has to be formed on than above-mentioned circular protrusion (92) to be leaned on inboard radially and is positioned at the end face that leans on armature one side of above-mentioned magnetic portion (63) and the inner space (93) between the end face of auxiliary stator one side that leans on of above-mentioned movable magnetic core (14,15), and is formed on than above-mentioned circular protrusion (92) by radially the outside and be positioned at the outer space (94) between above-mentioned movable magnetic core (14,15) and the above-mentioned housing (84～86);

Above-mentioned damping mechanism (64,92,95) has the fuel that is full of in above-mentioned non magnetic portion, above-mentioned circular protrusion (92), above-mentioned the 1st space (41) and above-mentioned inner space (93) and above-mentioned outer space (94) is communicated with the gap (95) of getting up;

Above-mentioned gap (95) is formed between above-mentioned non magnetic and the above-mentioned circular protrusion (92).

15. electromagnetic driver as claimed in claim 1 is characterized in that:

Above-mentioned moving body (10) is the valve of sparger with solenoid valve.

16. electromagnetic driver as claimed in claim 1 is characterized in that:

At the outer circumferential face of above-mentioned the 1st metal tube (18), and be formed with predetermined tubular gap between the inner peripheral surface of above-mentioned main stator (16).

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