CN102893016A - Electromagnetic fuel-injection valve - Google Patents
Electromagnetic fuel-injection valve Download PDFInfo
- Publication number
- CN102893016A CN102893016A CN2011800239407A CN201180023940A CN102893016A CN 102893016 A CN102893016 A CN 102893016A CN 2011800239407 A CN2011800239407 A CN 2011800239407A CN 201180023940 A CN201180023940 A CN 201180023940A CN 102893016 A CN102893016 A CN 102893016A
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- Prior art keywords
- valve
- guide bush
- slide member
- spool
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/188—Spherical or partly spherical shaped valve member ends
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9053—Metals
- F02M2200/9069—Non-magnetic metals
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
In the disclosed electromagnetic fuel-injection valve: a non-magnetic or weakly magnetic guide bush (19) is affixed at the inner periphery of an immobile core (6); the front end of the guide bush (19) protrudes from the suction surface (6a) of the immobile core (6); during excitation of a coil (37), by means of a mobile core (16) being caused to contact the front end of the guide bush (19), the opening boundary of a valve body (15) is defined, and an air gap (g) is formed between the immobile core (6) and the mobile core (16); and a sliding member (20) that is slidably borne at the inner peripheral surface of the guide bush (19) is provided to a valve assembly (V). As a result, a structure-simple electromagnetic fuel injection valve is provided wherein the opening/closing postures of the valve body can be effectively stabilized, and moreover at the time of demagnetization of the coil, valve closing responsiveness can be favorably obtained.
Description
Technical field
The present invention relates to the improvement of electro-magneto fuel injector, described electro-magneto fuel injector possesses: valve pocket, and it at one end has cone shape valve seat; Secured core, it is arranged at the other end of this valve pocket continuously, and has the hollow portion that becomes fuel flow path; The valve assembly body, its by and the opposed movable core of suction surface of secured core, and the spool of described valve seat concerted action and the valve rod that one between these secured cores and the spool is linked consist of; Valve spring, its to described spool to closing the valve direction application of force; And coil, it is equipped on the periphery of described secured core, thereby make secured core attract described movable core to make described spool drive valve by excitation, be provided with guide portion at described secured core, this guide portion supports the rearward end of described valve assembly body and it is slided freely.
Background technique
This electro-magneto fuel injector is known as patent documentation 1 is disclosed.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2008-31853 communique
Summary of the invention
Invent problem to be solved
In this electro-magneto fuel injector, the bearing stride of valve assembly body can be set as more longways more than the distance between valve seat and the secured core, thereby has following advantage: effectively prevent toppling over of valve assembly body, can effectively stablize the switching posture of spool.
The object of the present invention is to provide a kind of electro-magneto fuel injector simple in structure, it can be when guaranteeing aforesaid advantage, eliminates rapidly the remanent magnetism in secured core and the movable core when the coil demagnetization, and to close response valve good thereby make.
Be used for solving the technological scheme of problem
In order to reach above-mentioned purpose, electro-magneto fuel injector of the present invention possesses: valve pocket, and it at one end has cone shape valve seat; Secured core, it is arranged at the other end of this valve pocket continuously, and has the hollow portion that becomes fuel flow path; The valve assembly body, its by and the opposed movable core of suction surface of secured core, and the spool of described valve seat concerted action and the valve rod that one between these secured cores and the spool is linked consist of; Valve spring, its to described spool to closing the valve direction application of force; And coil, it is equipped on the periphery of described secured core, make secured core attract described movable core by excitation, thereby make described spool drive valve, be provided with guide portion at described secured core, the rearward end that this guide portion supports described valve assembly body is slided freely it, the First Characteristic of described electro-magneto fuel injector is, as described guide portion, the guide bush that is fixedly installed non magnetic or weak magnetic interior week at described secured core, make the front end of this guide bush outstanding from the suction surface of described secured core, when described coil magnetization, by making described movable core be connected to the front end of described guide bush, what limit described spool opens the valve boundary, and, between described secured core and movable core, form the space, be provided with the slide member of the inner peripheral surface that is supported on sliding freely described guide bush at described valve assembly body.And described guide bush is corresponding with the second guide bush 19 in the embodiments of the present invention described later.
In addition, the present invention is on the basis of First Characteristic, and its Second Characteristic is, is set as the hardness of described guide bush higher than the hardness of described secured core.
And then the present invention is on the basis of First Characteristic, and it the 3rd is characterised in that, is set as the hardness of described guide bush and described slide member roughly the same.
And then, the present invention is on the basis of the first or the 3rd feature, it the 4th is characterised in that, the outer circumferential face of described slide member is formed the sphere that has the center at the central axis of described valve assembly body, and this slide member is contacted with the inner peripheral surface line of described guide bush all the time.
And then, the present invention is on the basis of First Characteristic, it the 5th is characterised in that, the outer circumferential face of described spool is formed the sphere that has the center at the central axis of described valve assembly body, be formed with this spool of supporting at described valve pocket and make its slip guide portion freely, the outer circumferential face of described spool is contacted with the inner peripheral surface line of described guide portion all the time.And described guide portion is corresponding with the first guide bush 18 in the embodiments of the present invention described later.
And then on the basis of the present invention's any one feature in the first, the 3rd and the 4th feature, it the 6th is characterised in that, is formed with at the outer circumferential face of described slide member and divides the tabular surface that forms fuel flow path between described slide member and described guide bush.
And then on the basis of the present invention's any one feature in the first, the 3rd～the 6th feature, it the 7th is characterised in that, the ear end face of described slide member is formed the spring seat of the front end of the described valve spring of supporting.
And then, the present invention is on the basis of the 7th feature, it the 8th is characterised in that, described slide member is chimeric and be anchored at the outstanding fulcrum that arranges of the ear end face of described movable core, makes this fulcrum outstanding from the spring seat of described slide member in the mode in interior week of being embedded in described valve spring.
The invention effect
In accordance with a first feature of the invention, consisted of the guide bush in the interior week that is fixedly installed on secured core by non magnetic or weak magnetic material, and make the front end of this guide bush outstanding from the suction surface of secured core, when coil magnetization, by making movable core be connected to the front end of this guide bush, what limit described spool opens the valve boundary, and, between secured core and movable core, form the space, therefore, guide bush has been guaranteed the long bearing stride of valve assembly body, and have the supporting slide member concurrently with the function of the switching posture of venting valve assembly body, with the direct function of closing response valve with raising that contacts of avoiding when the coil magnetization movable core with secured core, can realize simultaneously the stabilization of fuel injection flow characteristic of electro-magneto fuel injector and the simplification of structure.
According to Second Characteristic of the present invention, guide bush has the hardness higher than secured core, therefore improve the wear resistance of guide bush, can make for a long time the switching posture of valve assembly body and the coefficient of sliding friction stable, and be conducive to the stabilization of the fuel injection flow characteristic of electromagnetic fuel injector.
According to the 3rd feature of the present invention, the hardness of guide bush and slide member is set as roughly the same, therefore improved the two wear resistance, thereby can make for a long time the switching posture of valve assembly body more stable.
According to the 4th feature of the present invention, the outer circumferential face of slide member is formed the sphere that has the center at the central axis of described valve assembly body, and this slide member is contacted all the time with the inner peripheral surface line of described guide bush, thus, the inclination of the valve assembly body that can not cause because of the making error of each several part increases slip resistance, and the valve assembly body is moved trippingly.
According to the 5th feature of the present invention, the outer circumferential face of spool is formed the sphere that has the center at the central axis of described valve assembly body, be formed with this spool of supporting at described valve pocket and make its slip guide portion freely, and the outer circumferential face of described spool is contacted all the time with the inner peripheral surface line of described guide portion, thus, the inclination of the valve assembly body that can not cause because of the making error of each several part increases slip resistance, the valve assembly body is moved trippingly, and can make spool be seated at rightly valve seat, close reliably valve.
According to the 6th feature of the present invention, by the plane machining to the outer circumferential face of slide member, can around slide member, form simply fuel flow path, and, utilize the fuel by this fuel flow path, can be effectively the slip surface of slide member and guide bush be lubricated, helps the raising of their wear resistance.
According to the 7th feature of the present invention, the slide member higher than secured core hardness formed the spring seat of the front end of supporting valve spring, so can access the spring seat of wear resistance.
According to the 8th feature of the present invention, slide member is fixed in the effect of movable core except performance at the outstanding fulcrum that arranges of the ear end face of movable core, also performance and the interior chimeric effect that prevents the flexible guiding element of buckling of valve spring of week of the front end of valve spring, help the stabilization of the expanding-contracting action of valve spring, and then help the stabilization of the on-off action of valve assembly body.
Description of drawings
Fig. 1 is the vertical profile side view that the motor of the first mode of execution of the present invention is used electro-magneto fuel injector.(the first embodiment)
Fig. 2 is the enlarged view of part shown in the arrow 2 of Fig. 1.(the first embodiment)
Fig. 3 is the sectional view along the 3-3 line among Fig. 1.(the first embodiment)
Fig. 4 is the sectional view along the 4-4 line among Fig. 2.(the first embodiment)
Fig. 5 is the sectional view along the 5-5 line among Fig. 2.(the first embodiment)
Fig. 6 illustrates figure the second mode of execution of the present invention, corresponding with Fig. 2.(the second embodiment)
Label declaration
I: Fuelinjection nozzle
V: valve assembly body
Y: the central axis of valve assembly body
2: valve pocket
6: secured core
6a: the suction surface of secured core
6b: the hollow portion of secured core
8: valve seat
15: spool
16: movable core
17: valve rod
18: guide portion (the first guide bush)
19: guide bush (the second guide bush)
20: slide member
23: fuel flow path
26: fuel flow path
29: fulcrum
31: spring seat
33: valve spring
Embodiment
Below, based on accompanying drawing embodiments of the present invention are described.
Embodiment 1
At first, Fig. 1 is described to the first mode of execution of the present invention shown in Figure 5.In Fig. 1 and Fig. 2, be provided with mounting hole 1b at firing chamber 1a opening in the cylinder head 1 of motor, the Fuelinjection nozzle I of electromagnetic type is installed at this mounting hole 1b.This Fuelinjection nozzle I can be towards firing chamber 1a burner oil.
The valve pocket 2 of this Fuelinjection nozzle I by valve base part 3, be incorporated into the magnetic cylindrical body 4 of rearward end of this valve base part 3 and the non-magnetic cylinder body 5 that is incorporated into coaxially the rear end of this magnetic cylindrical body 4 coaxially and consist of.Rear end at non-magnetic cylinder body 5 is combined with secured core 6 coaxially, is provided with continuously coaxially fuel inlet cylinder 7 in the rear end of this secured core 6.Secured core 6 has the hollow portion 6b with the internal communication of fuel inlet cylinder 7.Entrance at fuel inlet cylinder 7 is equipped with fuel filter 14.
Valve base part 3 is made of the path cylinder 3a of section with front bulkhead and the lip part 3b that is formed at the rear end of this path cylinder 3a of section, is formed with at the front bulkhead of the path cylinder 3a of section: cone shape valve seat 8; The valve opening 9 that links to each other with the front end of this valve seat 8; With link to each other with this valve opening 9 and at the fuel jet orifice 10 of the front-end face opening of the path cylinder 3a of section.
Magnetic cylindrical body 4 is made of the 4a of thin-walled cylinder section and the 4b of thick-walled cylinder section that is arranged at continuously the rear end of the 4a of this thin-walled cylinder section, and the 4b of thick-walled cylinder section forms that its internal diameter is less than the internal diameter of the 4a of thin-walled cylinder section, external diameter is larger than the external diameter of the 4a of thin-walled cylinder section.At the inner peripheral surface of the 4a of the thin-walled cylinder section successively chimeric lip part 3b that pad 11 and valve base part 3 are arranged, this lip part 3b is welded in the 4a of thin-walled cylinder section liquid-tightly.
The 4b of thick-walled cylinder section has the outstanding circular protrusion 12 of ear end face of all sides in it, the end of non-magnetic cylinder body 5 and this circular protrusion 12 against and be welded in the end of this circular protrusion 12 liquid-tightly.These 4b of thick-walled cylinder section and non-magnetic cylinder body 5 form inner peripheral surface and interconnect.
In the valve pocket 2 from valve base part 3 to non-magnetic cylinder body 5, taken in valve assembly body V.This valve assembly body V comprises: open and close the spool 15 of valve opening 9 with described valve seat 8 concerted actions; Be disposed at the movable core 16 of the inboard of magnetic cylindrical body 4 and non-magnetic cylinder body 5 in the opposed mode of suction surface 6a with the front end of secured core 6; And the valve rod 17 that one between these spools 15 and the movable core 16 is linked.
It is less than the diameter of spool 15 that valve rod 17 forms diameter, and have the central part that connects movable core 16 and the length of giving prominence to from the ear end face of movable core 16.In addition, valve rod 17 has the link flange 17a with the front end butt of movable core 16, and this link flange 17a is resisted against the front-end face of movable core 16.In addition, valve rod 17 is combined into one with spool 15 by welding.
In Fig. 2 and Fig. 3, be pressed into the first guide bush 18 cylindraceous at the front end inner peripheral surface of the path cylinder 3a of section, these first guide bush, 18 these spools 15 of supporting slide freely it.The mode of the outer circumferential face of spool 15 to contact with the inner peripheral surface line of the first guide bush 18 all the time forms the sphere that has the center at the central axis Y of valve assembly body V.Between the first guide bush 18 and valve rod 17, divide the fuel flow path 21 that is formed with tubular, be formed with a plurality of tabular surfaces 25 of division formation fuel flow path 22 between spool 15 and the first guide bush 18 at the outer circumferential face of spool 15.Therefore, the first guide bush 18 is allowed passing through of fuel in the on-off action of guide spool 15.
Be formed with chimeric recess 28 at suction surface 6a opening at the inner peripheral surface of secured core 6, the second guide bush 19 cylindraceous is fixedly installed on this chimeric recess 28 by being pressed into.It is continuous that this second guide bush 19 forms the inner peripheral surface of inner circumferential surface and secured core 6.On the other hand, the part that give prominence at the rear to movable core 16 of described valve rod 17 constitutes the fulcrum 29 that protrudes in the second guide bush 19, the slide member 20 that is supported on sliding freely the inner peripheral surface of above-mentioned the second guide bush 19 is embedded in this fulcrum 29, and is anchored on this fulcrum 29 by welding, riveted joint etc.Therefore, movable core 16 forms by linking flange 17a and slide member 20 clampings.
The outer circumferential face of above-mentioned slide member 20 forms the sphere that has the center at the central axis Y of valve assembly body V in the mode that the inner peripheral surface line with the second guide bush 19 contacts.
In addition, the front-end face of the second guide bush 19 is from the outstanding predetermined length of the suction surface 6a of secured core 6, and makes the ear end face of movable core 16 be connected to the front-end face of this second guide bush 19, and what limit thus spool 15 opens the valve boundary.In addition, when movable core 16 is connected to the second guide bush 19, between the opposed faces of movable core 16 and secured core 6, be formed with the second guide bush 19 from secured core 6 corresponding space (air gap) g of outstanding length forwards.Above-mentioned the second guide bush 19 and slide member 20 are made of the non magnetic or weak magnetic material higher than the hardness of secured core 6, the stainless steel of for example martensite.Thereby the hardness of second guide bush 19 and slide member 20 is roughly the same.
Utilize 2 supportings of above-mentioned first and second guide bush 18,19 couples of valve assembly body V, between the inner peripheral surface of the outer circumferential face of movable core 16 and magnetic cylindrical body 4 and non-magnetic cylinder body 5, can guarantee to prevent the gap 30 of the tubular of their contacts.
As shown in Figure 4, the outer circumferential face at slide member 20 is formed with a plurality of tabular surfaces 26 of dividing formation fuel flow path 23 between slide member 20 and the second guide bush 19.In addition, be provided with a plurality of through holes 24 of this movable core of up/down perforation at movable core 16.
And in Fig. 1 and Fig. 2, the ear end face of described slide member 20 is as the spring seat 31 of ring-type, and the hollow portion 6b of secured core 6 chimeric and be used to that compression is provided with valve spring 33 between the retainer 32 of the fixing tubulose of the riveted joint of side and spring seat 31,33 pairs of movable cores 16 of this valve spring close the valve side application of force to spool 15.Therefore, the front end of spring seat 31 supporting valve springs 33.At this moment, come the setting load of valve spring 33 is regulated with respect to the chimeric degree of depth of secured core 6 by retainer 32, after this is regulated, by the periphery wall of secured core 6 is riveted partly to the inside, thereby retainer 32 is fixed in secured core 6.Because the hardness of the hardness ratio secured core 6 of slide member 20 is high as mentioned above, so the spring seat 31 of the rear end of slide member 20 can be the high parts of wear resistance.
Described fulcrum 29 is outstanding from the spring seat 31 of slide member 20, and this projection is embedded in week in the front end of valve spring 33 in the mode of the flexible guiding element that becomes valve spring 33.
Embed at 6 the outer circumferential face from circular protrusion 12 to secured core of magnetic cylindrical body 4 coil assembly body 35 is installed.This coil assembly body 35 is made of the coil 37 that the coil rack 36 that is embedded in above-mentioned outer circumferential face and winding are installed on this coil rack 36, be incorporated into the ear end face of magnetic cylindrical body 4 by welding and butt around the front end of the solenoid housing 38 of this coil assembly body 35, the yoke 39 of ring-type that is connected in the rear end of solenoid housing 38 waits the outer circumferential face that is incorporated into secured core 6 by welding.
Outer circumferential face compression molding at the intermediate portion from rearward end to fuel inlet cylinder 7 of magnetic cylindrical body 4 has plastic clad 40.In the rear portion of this clad 40 periphery, be nick shaped and be formed with connector container 41, the connector 42 that links to each other with described coil 37 is disposed at this connector container 41, seals plastic cover 43 fastenings of side opening portion of this connector container 41 in clad 40.Be connected with the outer lead 44 of power supply usefulness at connector 42.
Next, the effect of this first mode of execution described.
Under the state of coil 37 demagnetization, valve assembly body V is forwards pressed by the active force of valve spring 33, thereby makes spool 15 be seated at valve seat 8, sealing valve opening 9.
By switching on to after coil 37 excitations, consequent magnetic flux passes secured core 6, solenoid housing 38, magnetic cylindrical body 4 and movable core 16 successively, by its magnetic force, the movable core 16 of valve assembly body V overcomes the setting load of valve spring 33 and iron core 6 attractions that are fixed, spool 15 leaves from valve seat 8, so valve opening 9 is open.Therefore, never illustrated petrolift to the fuel of fuel inlet cylinder 7 force feeds flow through successively tubulose retainer 32 inside, secured core 6 hollow portion 6b, slide member 20 around fuel flow path 23, the through hole 24 of movable core 16, the inside of valve pocket 2, the fuel flow path 21 of the first guide bush 18 inboards, fuel flow path 22, valve seat 8, the valve opening 9 around the spool 15, inject directly to the firing chamber of motor from fuel nozzle ports 10.
In addition, the first guide bush 18 that the spool 15 that arranges respectively in front end and the rearward end of valve assembly body V and slide member 20 are supported on respectively valve base part 3 sliding freely and the second guide bush 19 of secured core 6, therefore, the bearing stride of valve assembly body V can be set as more longways more than the distance between valve seat 8 and the secured core 6, make the switching stable posture of valve assembly body V, thereby can prevent the not normal of fuel injection flow characteristic.And, the second guide bush 19 is made of the non magnetic or weak magnetic material higher than the hardness of secured core 6, therefore wear resistance is high, can make for a long time the coefficient of sliding friction of valve assembly body V stable, and can make the fuel injection flow characteristic of Fuelinjection nozzle I more stable.
In addition, the hardness of the second guide bush 19 and slide member 20 is set as roughly the same, therefore improves both wear resistancies of 19,20, thereby can make for a long time the switching posture of valve assembly body V more stable.
And, the outer circumferential face of spool 15 and slide member 20 forms respectively the sphere that has the center and contact with first and second guide bush 18,19 inner peripheral surface line at the central axis Y of valve assembly body V, the inclination of the valve assembly body that therefore can not cause because of the making error of each several part increases slip resistance, valve assembly body V is moved trippingly, and can make spool 15 be seated at rightly valve seat 8, close reliably valve.
In addition, when coil 37 excitation, be connected to from the front-end face of the second outstanding guide bush 19 of the suction surface of secured core 6 by the movable core 16 that makes valve assembly body V, what limit spool 15 opens the valve boundary, movable core 16 is opposite across the suction surface 6a of space g and secured core 6, avoided contacting with the direct of secured core 6, therefore, add the second guide bush 19 and be non magnetic or weak magnetic, when coil 37 demagnetization, remanent magnetism between two iron cores 6,16 rapidly disappears, thereby can improve the response valve that closes of spool 15.
As mentioned above, the second guide bush 19 has concurrently: supporting slide member 20 is with the function of the switching posture of venting valve assembly body V; With when coil 37 excitation, the function of avoiding the direct contact of movable core 16 and secured core 6 to close response valve with raising can realize the simplification of stabilization and the structure of fuel injection characteristic simultaneously.
In addition, outer circumferential face at spool 15 is formed with a plurality of tabular surfaces 25 of dividing formation fuel flow path 22 between spool 15 and the first guide bush 18, outer circumferential face at slide member 20 is formed with a plurality of tabular surfaces 26 of dividing formation fuel flow path 23 between slide member 20 and the second guide bush 19, therefore, by the plane machining to each outer circumferential face of spool 15 and slide member 20, can around spool 15 and slide member 20, form simply fuel flow path 22,23, and utilize by these fuel flow paths 22,23 fuel, can be effectively to spool 15 and the first guide bush 18, each slip surface of slide member 20 and the second guide bush 19 is lubricated, and helps the raising of their wear resistance.
In addition, fulcrum 29 is from the spring seat 31 outstanding and extensions of slide member 20, its mode with the flexible guiding element that becomes valve spring 33 is embedded in week in the front end of valve spring 33, therefore, except performance is fixed in slide member 20 effect of movable core 16, also performance prevents the effect of the flexible guiding element of buckling of valve spring 33, helps the stabilization of the expanding-contracting action of valve spring 33, and then helps the stabilization of the on-off action of valve assembly body V.
Then, the second mode of execution of the present invention shown in Figure 6 is described.
In this second mode of execution, in valve assembly body V, at the identical integrally formed valve rod 17 of material of the front-end face utilization of movable core 16 and movable core 16, and at the identical integrally formed fulcrum 29 of material of the ear end face utilization of movable core 16 and movable core 16, slide member 20 is chimeric and be anchored on this fulcrum 29, other structure is identical with aforementioned embodiments, so among Fig. 6 the part corresponding with aforementioned embodiments is marked with same reference number, and omits repeat specification.
The invention is not restricted to above-mentioned mode of execution, can in the scope that does not break away from its purport, carry out various design alterations.For example, Fuelinjection nozzle V can be constituted to the form of the gas handling system burner oil of motor.In addition, can replace supporting spool 15 at valve base part 3 formation pilot holes and make its slip the first guide bush 18 freely.
Claims (8)
1. electro-magneto fuel injector, this electro-magneto fuel injector possesses:
Valve pocket (2), it at one end has cone shape valve seat (8);
Secured core (6), it is arranged at the other end of this valve pocket (2) continuously, and has the hollow portion (6b) that becomes fuel flow path;
Valve assembly body (V), its by and the opposed movable core of suction surface (6a) (16) of secured core (6), and the spool (15) of described valve seat (8) concerted action and the valve rod (17) that one between these secured cores (6) and the spool (15) links consisted of;
Valve spring (33), its to described spool (15) to closing the valve direction application of force; And
Coil (37), it is disposed at the periphery of described secured core (6), makes secured core (6) attract described movable core (16) by excitation, thereby makes described spool (15) drive valve,
Be provided with guide portion at described secured core (6), the rearward end that this guide portion supports described valve assembly body (V) is slided freely it,
Described electro-magneto fuel injector is characterised in that,
As described guide portion, the guide bush that is fixedly installed non magnetic or weak magnetic interior week (19) at described secured core (6), make the front end of this guide bush (19) outstanding from the suction surface (6a) of described secured core (6), when described coil (37) excitation, by making described movable core (16) be connected to the front end of described guide bush (19), what limit described spool (15) opens the valve boundary, and, between described secured core (6) and movable core (16), form space (g), be provided with the slide member (20) of the inner peripheral surface that is supported on sliding freely described guide bush (19) at described valve assembly body (V).
2. electro-magneto fuel injector according to claim 1 is characterized in that,
Be set as the hardness of described guide bush (19) higher than the hardness of described secured core (6).
3. electro-magneto fuel injector according to claim 1 is characterized in that,
Be set as the hardness of described guide bush (19) and described slide member (20) roughly the same.
4. according to claim 1 or 3 described electro-magneto fuel injectors, it is characterized in that,
The outer circumferential face of described slide member (20) is formed the sphere that has the center at the central axis (Y) of described valve assembly body (V), this slide member (20) is contacted with the inner peripheral surface line of described guide bush (19) all the time.
5. electro-magneto fuel injector according to claim 1 is characterized in that,
The outer circumferential face of described spool (15) is formed the sphere that has the center at the central axis (Y) of described valve assembly body (V), be formed with this spool of supporting (15) at described valve pocket (2) and make its slip guide portion (18) freely, the outer circumferential face of described spool (15) is contacted with the inner peripheral surface line of described guide portion (18) all the time.
6. according to claim 1, the described electro-magneto fuel injector of any one in 3,4, it is characterized in that,
Outer circumferential face at described slide member (20) is formed with the tabular surface (26) of dividing formation fuel flow path (23) between described slide member (20) and described guide bush (19).
7. according to claim 1, the described electro-magneto fuel injector of any one in 3～6, it is characterized in that,
The ear end face of described slide member (20) is formed the spring seat (31) of the front end of the described valve spring of supporting (33).
8. electro-magneto fuel injector according to claim 7 is characterized in that,
Described slide member (20) is chimeric and be anchored at the outstanding fulcrum (29) that arranges of the ear end face of described movable core (16), make this fulcrum (29) outstanding from the spring seat (31) of described slide member (20) in the mode in interior week of being embedded in described valve spring (33).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-112352 | 2010-05-14 | ||
| JP2010112352A JP5623784B2 (en) | 2010-05-14 | 2010-05-14 | Electromagnetic fuel injection valve |
| PCT/JP2011/060244 WO2011142258A1 (en) | 2010-05-14 | 2011-04-27 | Electromagnetic fuel-injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102893016A true CN102893016A (en) | 2013-01-23 |
| CN102893016B CN102893016B (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201180023940.7A Active CN102893016B (en) | 2010-05-14 | 2011-04-27 | Electromagnetic fuel-injection valve |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2570648B1 (en) |
| JP (1) | JP5623784B2 (en) |
| CN (1) | CN102893016B (en) |
| MX (1) | MX2012013236A (en) |
| WO (1) | WO2011142258A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110651116A (en) * | 2017-05-23 | 2020-01-03 | 三菱电机株式会社 | Ejector |
| CN113175402A (en) * | 2020-01-24 | 2021-07-27 | 株式会社京浜 | Electromagnetic fuel injection valve |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5862941B2 (en) * | 2011-11-08 | 2016-02-16 | 株式会社デンソー | Fuel injection valve |
| JP6035648B2 (en) * | 2012-11-05 | 2016-11-30 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
| JP5857952B2 (en) | 2012-12-26 | 2016-02-10 | 株式会社デンソー | Fuel injection valve |
| JP6020194B2 (en) * | 2013-01-22 | 2016-11-02 | 株式会社デンソー | Fuel injection valve |
| JP6087210B2 (en) * | 2013-05-24 | 2017-03-01 | 日立オートモティブシステムズ株式会社 | Fuel injection valve |
| EP3009658B1 (en) | 2014-10-15 | 2017-09-06 | Continental Automotive GmbH | Injector for injecting fluid |
| WO2016067354A1 (en) * | 2014-10-28 | 2016-05-06 | 三菱電機株式会社 | Fuel injection valve |
| JP2016166534A (en) * | 2015-03-09 | 2016-09-15 | 日立オートモティブシステムズ株式会社 | Fuel injection valve |
| JP6426556B2 (en) * | 2015-08-06 | 2018-11-21 | 株式会社デンソー | Fuel injection device |
| JP6449741B2 (en) * | 2015-09-02 | 2019-01-09 | 株式会社デンソー | Fuel injection device |
| JP6292272B2 (en) * | 2016-09-28 | 2018-03-14 | 株式会社デンソー | Fuel injection valve |
| JP7056369B2 (en) * | 2017-07-28 | 2022-04-19 | 株式会社デンソー | Valve device |
| KR102049802B1 (en) | 2018-01-26 | 2019-11-28 | (주)모토닉 | Damping construction for electronic solenoid valve |
| JP6451883B2 (en) * | 2018-02-05 | 2019-01-16 | 株式会社デンソー | Fuel injection valve |
| JP2023062216A (en) * | 2020-03-26 | 2023-05-08 | 日立Astemo株式会社 | Fuel injection device |
| WO2021201028A1 (en) * | 2020-03-31 | 2021-10-07 | 株式会社デンソー | Fuel injection valve |
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| JP4104508B2 (en) * | 2003-08-26 | 2008-06-18 | 株式会社ケーヒン | solenoid valve |
| JP2008031853A (en) * | 2006-07-26 | 2008-02-14 | Denso Corp | Fuel injection valve |
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2011
- 2011-04-27 MX MX2012013236A patent/MX2012013236A/en active IP Right Grant
- 2011-04-27 EP EP11780515.0A patent/EP2570648B1/en active Active
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| CN1768201A (en) * | 2003-03-31 | 2006-05-03 | 株式会社京浜 | Electromagnetic fuel injection valve |
| JP2008144663A (en) * | 2006-12-08 | 2008-06-26 | Denso Corp | Injector |
| JP2009221879A (en) * | 2008-03-13 | 2009-10-01 | Keihin Corp | Manufacturing method of electromagnetic fuel injection valve |
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| CN110651116A (en) * | 2017-05-23 | 2020-01-03 | 三菱电机株式会社 | Ejector |
| CN110651116B (en) * | 2017-05-23 | 2021-12-24 | 三菱电机株式会社 | Ejector |
| CN113175402A (en) * | 2020-01-24 | 2021-07-27 | 株式会社京浜 | Electromagnetic fuel injection valve |
| CN113175402B (en) * | 2020-01-24 | 2023-02-17 | 日立安斯泰莫株式会社 | Electromagnetic fuel injection valve |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2570648B1 (en) | 2017-03-15 |
| WO2011142258A1 (en) | 2011-11-17 |
| MX2012013236A (en) | 2013-01-24 |
| JP5623784B2 (en) | 2014-11-12 |
| EP2570648A4 (en) | 2013-12-18 |
| JP2011241701A (en) | 2011-12-01 |
| EP2570648A1 (en) | 2013-03-20 |
| CN102893016B (en) | 2015-01-21 |
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