CN104481765B - Fuelinjection nozzle - Google Patents
Fuelinjection nozzle Download PDFInfo
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- CN104481765B CN104481765B CN201410725742.0A CN201410725742A CN104481765B CN 104481765 B CN104481765 B CN 104481765B CN 201410725742 A CN201410725742 A CN 201410725742A CN 104481765 B CN104481765 B CN 104481765B
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Abstract
The present invention relates to a kind of Fuelinjection nozzle, be particularly used in the high-pressure common-rail injection system of Diesel engine, the fuel under high pressure coming from high pressure pressure accumulation chamber is ejected in cylinder of diesel engine, belong to engine fuel injection valve technology field.It includes oil injector body, control valve it is provided with between oil injector body and orifice plate, control valve includes controlling valve rod and control valve seat, control valve seat center is sequentially provided with valve seat orifice from top to bottom and controls valve chamber, valve seat orifice and the connection of control valve indoor can control valve rod in axial sliding, control to be connected with controlling the armature that valve rod is synchronized with the movement by snap ring in the middle part of valve rod.The present invention is achieved by control valve and allows fuel-displaced throttle orifice draining when oil spout of orifice plate, and the function of reverse oil-feed when not oil spout, it is achieved thereby that a hole is dual-purpose, improves the response speed of injection valve, is advantageously implemented multi-injection.
Description
Technical field
The present invention relates to a kind of Fuelinjection nozzle, be particularly used in the high-pressure common-rail injection system of Diesel engine, the fuel under high pressure coming from high pressure pressure accumulation chamber is ejected in cylinder of diesel engine, belong to engine fuel injection valve technology field.
Background technology
In order to meet the Abgasgesetz of increasingly stringent, the Fuelinjection nozzle that diesel emission rises material impact needs to improve further its accuracy of spray and response speed.For high-pressure injection system, existing Fuelinjection nozzle controls the opening and closing of needle-valve by control valve.Orifice plate in control valve typically realizes the fuel oil in control room with extraneous exchange by meter in hole and fuel-displaced throttle orifice.Hydraulic oil is incorporated in control room and produces the closing forces to needle-valve by fuel feed hole, and hydraulic oil is leaked into low pressure chamber by oil outlet, reduces needle-valve closing forces.The speed of high pressure fuel turnover control room, directly influences the speed that needle-valve is closed and opened, and then has influence on the delay size of end of injection and unlatching.Typical fuel injection valve is such as known by DE19650865A1.
Meter in hole flow in above-mentioned known Fuelinjection nozzle aperture plate should be less than fuel-displaced throttle orifice flow, the control to needle-valve opening and closing could be realized, yet with the meter in hole throttling action to hydraulic oil, oil-feed speed is slower, after end of injection, hydraulic oil fills control room by meter in hole needs considerable time, and this delay causing needle-valve to be closed is the biggest, it is unfavorable for the accurate control of distributive value, also brings difficulty to multi-injection.The problem slower in order to solve control room oil-feed, in injection valve disclosed in EP0976924B1, take the structure of a kind of two-position three-way valve, in order to close closure member at the end of injection, available piezo actuator opens the other passage being connected with hydraulic oil, can utilize simultaneously into and out of oil throttle orifice, fuel is fed in control room, so can effectively improve oil-feed speed, accelerate the closedown of needle-valve.But, relative to conventional solenoid valve executor, piezoelectric structure with high costs, reliability also needs to improve further.For said structure, if directly making electromagnetic valve executor into, huge hydraulic coupling cannot be overcome again so that work process cannot realize.In addition being configured to the orientation existing problems of mushroom valve element, owing to two valve seats are arranged in different orifice plates, two orifice plates must be precisely oriented the most each other, and the sealing of at least one of which base suffers damage.
In prior art, there are problems in these Fuelinjection nozzles As mentioned above, and some is that needle valve element is closed too slowly, affects the precision of emitted dose, makes troubles to multi-injection；Some is that infrastructure cost price is high, poor reliability.
Summary of the invention
It is an object of the invention to overcome above-mentioned weak point, thus a kind of Fuelinjection nozzle is provided, on the basis using traditional solenoid type electromagnetic valve, the closedown shortening injection valve postpones, improve response speed, and then also be able to carry out high-precision spraying fire when spraying the fuel of higher pressure, and the realization of beneficially multi-injection.
The technical scheme provided according to the present invention, Fuelinjection nozzle includes oil injector body and the tight cap of oil nozzle, orifice plate and oil nozzle body it is provided with in the tight cap of oil nozzle, the tight cap of oil nozzle is connected on oil injector body, and by oil nozzle tight cap, orifice plate and oil nozzle body being pressed on oil injector body lower end, oil injector body center is provided with electromagnetic valve executor；Being provided with oil nozzle intracoelomic cavity in described oil nozzle body, install needle-valve in oil nozzle intracoelomic cavity, needle-valve can slide up and down along oil nozzle intracoelomic cavity；Oil nozzle body lower end is provided with spray orifice, and needle-valve lower end is provided with the pressure-bearing seat surface of cone near combustor side, and when needle-valve is descending, pressure-bearing seat surface blocks the connection of spray orifice and oil nozzle intracoelomic cavity, and when needle-valve is up, pressure-bearing seat surface opens the connection of spray orifice and oil nozzle intracoelomic cavity；Described orifice plate lower end is provided with sleeve, bushing core is provided with the barrel bore accommodating needle-valve top, and needle-valve is set with needle valve spring, needle valve spring upper-end contact sleeve lower surface, the spring supporting platform arranged in the middle part of lower end contact needle-valve, sleeve is in close contact with orifice plate lower surface by needle valve spring pressure；Described orifice plate lower surface, sleeve interior surface and needle-valve deviate from the end face of combustor and form control room, orifice plate is provided with fuel-displaced throttle orifice and meter in hole, fuel-displaced throttle orifice connects control room with lower end, meter in hole, it is characterized in that: between described oil injector body and orifice plate, be provided with control valve, control valve includes controlling valve rod and control valve seat, control valve seat center is sequentially provided with valve seat orifice from top to bottom and controls valve chamber, valve seat orifice and the connection of control valve indoor can control valve rod in axial sliding, control to connect with controlling the armature that valve rod is synchronized with the movement by snap ring in the middle part of valve rod, armature is positioned at the armature chamber of oil injector body；Described valve seat orifice and control valve chamber junction are provided with the conical surface under valve seat, control stem lower portion and be provided with the conical surface under valve rod, when control valve rod is up, under valve rod, the conical surface is formed with the conical surface under valve seat and seals the connection coordinating blocked valve bore with controlling valve chamber, when control valve rod is descending, under valve rod, the conical surface departs from the conical surface under valve seat and coordinates the connection got through valve seat orifice with control valve chamber；Valve seat orifice top is provided with the conical surface on valve seat, armature lower end is provided with the conical surface under armature, when armature is descending, under armature, the conical surface is formed with the conical surface on valve seat and seals the connection coordinating blocked valve bore with armature chamber, when armature is up, under armature, the conical surface and valve seat epicone emaciated face are from coordinating the connection getting through valve seat orifice with armature chamber；In electromagnetic valve executor, it is provided with electric magnet through hole, controls valve rod top and stretch in electric magnet through hole and compress the electric magnet spring being positioned in electric magnet through hole；Being provided with oil outlet in control valve seat, oil outlet one end connects with fuel-displaced throttle orifice, and the oil outlet other end connects with valve seat orifice；Being provided with high pressure fuel feed hole in oil injector body, be provided with hydraulic oil connecting hole in control valve seat, high pressure fuel feed hole is connected with control valve chamber and meter in hole by hydraulic oil connecting hole.
Further, being provided with adjustment ring in armature chamber, adjustment ring is pressed between electromagnetic valve executor and control valve seat.
Further, controlling stem lower portion suit buffer spring, buffer spring upper end relies on location, conical surface lower surface under valve rod to support, and buffer spring lower end relies on orifice plate upper surface location to support.
Further, a diameter of h2 of valve seat orifice, controlling valve rod lower end diameter is h1, h2=h1.
Further, being provided with valve rod mounting groove at orifice plate upper surface, control stem lower portion and stretch in valve rod mounting groove and coordinate with valve rod mounting groove coupling, control valve rod center and be provided with valve rod spill port, valve rod spill port connects with valve rod mounting groove and electric magnet through hole.
Compared with the prior art the present invention has the advantage that
The fuel oil that the fuel-displaced throttle orifice of traditional fuel injection valve is only responsible for drawing in control room realizes oil draining function, the present invention is then achieved by control valve and allows fuel-displaced throttle orifice draining when oil spout of orifice plate, the function of reverse oil-feed when not oil spout, it is achieved thereby that a hole is dual-purpose, this makes injection valve when terminating oil spout, and control room oil-feed is accelerated, and delay reduction is closed in oil spout, improve the response speed of injection valve, be advantageously implemented multi-injection.Additionally the present invention uses traditional electromagnetic valve executor, low cost, technology maturation, and number of parts is few, integrated height, it is simple to processes and assembles.
Accompanying drawing explanation
Sectional view in Fig. 1 illustrates the main part of the Fuelinjection nozzle according to one embodiment of the present invention.
Fig. 2 is a zoomed-in view of Fig. 1 control valve part.
nullDescription of reference numerals: 1-high pressure fuel feed hole、The tight cap of 2-oil nozzle、3-oil injector body、4-electric magnet through hole、5-electromagnetic valve executor、6-electric magnet spring、7-adjustment ring、8-armature、9-control valve seat、10-controls valve rod、11-valve rod spill port、12-oil outlet、13-buffer spring、14-controls valve chamber、15-valve rod mounting groove、16-orifice plate、The fuel-displaced throttle orifice of 17-、18-meter in hole、19-control room、20-sleeve、21-needle valve spring、22-needle-valve、23-oil nozzle body、24-spray orifice、The conical surface on 25-valve seat、The conical surface under 26-armature、The conical surface under 27-valve seat、The conical surface under 28-valve rod、29-valve seat orifice、30-snap ring、31-armature chamber、32-hydraulic oil connecting hole、33-barrel bore、34-oil nozzle intracoelomic cavity、35-spring supporting platform、36-pressure-bearing seat surface、37-needle-valve pressure-bearing surface.
Detailed description of the invention
The embodiment combined in accompanying drawing is further described by the present invention below:
As shown in Figure 1 and 2, the invention mainly comprises oil injector body 3 and the tight cap of oil nozzle 2, in the tight cap of oil nozzle 2, be provided with orifice plate 16 and oil nozzle body 23, oil injector body 3 connects the tight cap of oil nozzle 2, and by the tight cap of oil nozzle 2, orifice plate 16 and oil nozzle body 23 is pressed on oil injector body 3 lower end.Oil injector body 3 center is provided with electromagnetic valve executor 5, uses electromagnetic valve executor 5 not only technology maturation, and with low cost.
Being provided with oil nozzle intracoelomic cavity 34 in described oil nozzle body 23, install needle-valve 22 in oil nozzle intracoelomic cavity 34, needle-valve 22 can slide up and down along oil nozzle intracoelomic cavity 34.Oil nozzle body 23 lower end is provided with spray orifice 24, and needle-valve 22 lower end is provided with the pressure-bearing seat surface 36 of cone near combustor side.
Under needle-valve 22 drives, pressure-bearing seat surface 36 can control being turned on and off of spray orifice 24.When needle-valve 22 is descending, pressure-bearing seat surface 36 blocks the connection of spray orifice 24 and oil nozzle intracoelomic cavity 34, and when needle-valve 22 is up, pressure-bearing seat surface 36 opens the connection of spray orifice 24 and oil nozzle intracoelomic cavity 34.Fuel under high pressure is ejected in the combustor of diesel engine through spray orifice 24.
Described orifice plate 16 lower end is provided with sleeve 20, and sleeve 20 center is provided with the barrel bore 33 accommodating needle-valve 22 top, and needle-valve 22 top can be formed to support and can accommodate again needle-valve 22 top in interior slip by barrel bore 33.
Needle valve spring 21, needle valve spring 21 upper-end contact sleeve 20 lower surface, the spring supporting platform 35 arranged in the middle part of lower end contact needle-valve 22 it is set with on needle-valve 22.Sleeve 20 is in close contact with orifice plate 16 lower surface by needle valve spring 21 pressure.Needle-valve 22 is axially reciprocating under the effect of needle valve spring 21 and hydraulic coupling, it is achieved the opening and closing of fuel injector.
Described orifice plate 16 lower surface, sleeve 20 inner surface and needle-valve 22 deviate from the end face of combustor and form control room 19, and orifice plate 16 is provided with fuel-displaced throttle orifice 17 and meter in hole 18, and fuel-displaced throttle orifice 17 connects control room 19 with lower end, meter in hole 18.
Present invention additionally comprises the control valve arranged between oil injector body 3 and orifice plate 16, control valve includes controlling valve rod 10 and control valve seat 9, control valve seat 9 center is sequentially provided with valve seat orifice 29 from top to bottom and controls valve chamber 14, connects and can control valve rod 10 in axial sliding in valve seat orifice 29 and control valve chamber 14.Controlling to be connected with controlling the armature 8 that valve rod 10 is synchronized with the movement by snap ring 30 in the middle part of valve rod 10, armature 8 is positioned at the armature chamber 31 of oil injector body 3.
It is provided with adjustment ring 7 in described armature chamber 30, adjustment ring 7 is pressed between electromagnetic valve executor 5 and control valve seat 9, by changing the adjustment ring 7 of different-thickness, the air gap between armature 8 and electromagnetic valve executor 5 can easily be adjusted, so that armature 8 is attained by rational sealing effectiveness with two sealing surfaces up and down in control valve seat 9.
It is provided with valve rod mounting groove 15 at orifice plate 16 upper surface, control valve rod 10 bottom stretch in valve rod mounting groove 15 and coordinate with valve rod mounting groove 15 coupling, the purpose arranging valve rod mounting groove 15 is to avoid the bottom controlling valve rod 10 directly to contact with the hydraulic oil controlled in valve chamber 14, causes controlling valve rod and can not close under big rail pressure.Controlling valve rod 10 center and be provided with valve rod spill port 11, valve rod spill port 11 connects with valve rod mounting groove 15 and electric magnet through hole 4.Valve rod spill port 11 can be by deriving to electric magnet through hole 4 from the oil return controlling to leak in valve rod mounting groove 15 in valve chamber 14, outside spill port guides to fuel injector.
Described valve seat orifice 29 and control valve chamber 14 junction are provided with the conical surface 27 under valve seat, control valve rod 10 bottom and be provided with the conical surface 28 under valve rod, when control valve rod 10 is up, under valve rod, the conical surface 28 is formed with the conical surface under valve seat 27 and seals the connection coordinating blocked valve bore 29 with controlling valve chamber 14, when control valve rod 10 is descending, under valve rod, the conical surface 28 departs from the conical surface under valve seat 27 and coordinates the connection got through valve seat orifice 29 with control valve chamber 14.
Control valve rod 10 bottom suit buffer spring 13, buffer spring 13 upper end relies on location, the conical surface 28 lower surface under valve rod to support, buffer spring 13 lower end relies on orifice plate 16 upper surface location to support, and compresses under valve rod the conical surface 28 and the conical surface 27 under valve seat by buffer spring 13 and reduces the control valve rod 10 speed during descending.
Valve seat orifice 29 top is provided with the conical surface 25 on valve seat, armature 8 lower end is provided with the conical surface 26 under armature, when armature 8 is descending, under armature, the conical surface 26 is formed with the conical surface on valve seat 25 and seals the connection coordinating blocked valve bore 29 with armature chamber 31, when armature 8 is up, under armature, the conical surface 26 departs from the conical surface on valve seat 25 and coordinates the connection getting through valve seat orifice 29 with armature chamber 31.
In electromagnetic valve executor 5, it is provided with electric magnet through hole 4, controls valve rod 10 top and stretch in electric magnet through hole 4 and compress the electric magnet spring 6 being positioned in electric magnet through hole 4, control the mating part guide effect by electric magnet through hole 4 of valve rod 10 and electric magnet through hole 4.
Being provided with oil outlet 12 in control valve seat 9, oil outlet 12 one end connects with fuel-displaced throttle orifice 17, and oil outlet 12 other end connects with valve seat orifice 29.High pressure fuel feed hole 1 it is provided with in oil injector body 3, hydraulic oil connecting hole 32 it is provided with in control valve seat 9, high pressure fuel feed hole 1 is connected with control valve chamber 14 and meter in hole 18 by hydraulic oil connecting hole 32, this makes to control valve chamber 14 and is full of hydraulic oil the most all the time, hydraulic oil is constantly flowed in control room 19 by meter in hole 18 simultaneously, and on the other hand the hydraulic oil in control room 19 enters in oil outlet 12 through fuel-displaced throttle orifice 17.
When control valve is opened, the high pressure fuel in control room 19 can release.The pressure of control room 19 periodically reduces during control valve opens and closes and raises, in order to control the opening and closing of needle-valve 22.
The described a diameter of h2 of valve seat orifice 29, controlling valve rod 10 lower end diameter is h1, h2=h1, its objective is no matter when valve rod 10 lifts or closes, the projected area of the upper and lower surface that the entirety that valve rod 10 forms with armature 8 contacts with hydraulic oil is equal so that controls valve rod 10 suffered hydraulic coupling in high pressure fuel environment and remains balance.So can reduce the pretightning force of electric magnet spring 6, control impact when valve rod 10 is taken a seat, improve valve rod 10 and the response speed of armature 8, make whole scheme be achieved.
The work process of the present invention is: when electromagnetic valve executor 5 is energized, armature 8 is risen by electromagnetic force, under armature, the conical surface 26 separates with the conical surface on valve seat 25, and oil discharge passage is opened, and the hydraulic oil in control room 19 is in fuel-displaced throttle orifice 17, oil outlet 12, valve seat orifice 29 leak into the armature chamber 31 of low pressure.Meanwhile, armature 8 rising drives the control valve rod 10 being attached thereto to rise, and under valve rod, the conical surface 28 seals the conical surface 27 under valve seat, blocks hydraulic oil from controlling valve chamber 14 and flows into valve seat orifice 29, and this makes the pressure in control room 19 reduce rapidly.When the closing forces acting on needle-valve 22 upper surface in control room 19 acts on the opening force on needle-valve pressure-bearing surface 37 less than oil nozzle intracoelomic cavity 34 mesohigh oil, needle-valve 22 is then opened, and needle-valve 22 is separated with pressure-bearing seat surface 36, and fuel then sprays into combustor through spray orifice 24.
When electromagnetic valve executor's 5 power-off, control valve rod 10 descending under the effect of electric magnet spring 6, the armature 8 being attached thereto is driven to fall, under armature, the conical surface 26 is enclosed on valve seat on the conical surface 25, and the hydraulic oil blocked in control room 19 leaks in armature chamber 31 through fuel-displaced throttle orifice 17, oil outlet 12, valve seat orifice 29.Meanwhile, the valve rod conical surface 28 is separated with the conical surface under valve seat 27, controls valve chamber 14 and is connected with valve seat orifice 29, and hydraulic oil, through valve seat orifice 29, blows back in control room 19 along oil outlet 12, fuel-displaced throttle orifice 17；On the other hand, hydraulic oil is also constantly being injected in control room 19 in the meter in hole 18 being always connected with high-pressure oil passage, fuel pressure in control room 19 improves rapidly, when acting on the closing force of needle-valve 22 upper surface more than when acting on the opening force on needle-valve pressure-bearing surface 37, needle-valve 22 is descending takes a seat, and fuel oil stops spraying into cylinder.
For conventional control valve, during end of injection, the approach of hydraulic oil entrance control room only has one, meter in hole, boost in pressure in control room is the slowest, it is bigger that this causes oil spout to close delay, and for the present invention, fuel-displaced throttle orifice can also allow a part of hydraulic oil through its control room that refluxes after disconnecting with low pressure chamber, add a passage entering control room, make control room can recover pressure faster, control needle-valve and take a seat faster oil-break.
Those skilled in the art will readily appreciate that other advantage and remodeling.Thus in broad scope, the present invention is not limited in literary composition detail content, representative device and the schematic embodiment representing and describing.
Claims (5)
1. a Fuelinjection nozzle, including oil injector body (3) and the tight cap of oil nozzle (2), orifice plate (16) and oil nozzle body (23) it is provided with in the tight cap of oil nozzle (2), oil injector body (3) is upper connects the tight cap of oil nozzle (2), and by the tight cap of oil nozzle (2), orifice plate (16) and oil nozzle body (23) being pressed on oil injector body (3) lower end, oil injector body (3) center is provided with electromagnetic valve executor (5)；Being provided with oil nozzle intracoelomic cavity (34) in described oil nozzle body (23), install needle-valve (22) in oil nozzle intracoelomic cavity (34), needle-valve (22) can slide up and down along oil nozzle intracoelomic cavity (34)；Oil nozzle body (23) lower end is provided with spray orifice (24), needle-valve (22) lower end is provided with the pressure-bearing seat surface (36) of cone near combustor side, when needle-valve (22) is descending, pressure-bearing seat surface (36) blocks the connection of spray orifice (24) and oil nozzle intracoelomic cavity (34), when needle-valve (22) is up, pressure-bearing seat surface (36) opens the connection of spray orifice (24) and oil nozzle intracoelomic cavity (34)；
Described orifice plate (16) lower end is provided with sleeve (20), sleeve (20) center is provided with the barrel bore (33) accommodating needle-valve (22) top, needle valve spring (21) it is set with on needle-valve (22), needle valve spring (21) upper-end contact sleeve (20) lower surface, the spring supporting platform (35) that middle part, lower end contact needle-valve (22) is arranged, sleeve (20) is in close contact with orifice plate (16) lower surface by needle valve spring (21) pressure；Described orifice plate (16) lower surface, sleeve (20) inner surface and needle-valve (22) deviate from the end face of combustor and form control room (19), orifice plate (16) is provided with fuel-displaced throttle orifice (17) and meter in hole (18), fuel-displaced throttle orifice (17) connects control room (19) with meter in hole (18) lower end, it is provided with control valve between described oil injector body (3) and orifice plate (16), control valve includes controlling valve rod (10) and control valve seat (9), it is characterized in that:
Control valve seat (9) center is sequentially provided with valve seat orifice (29) from top to bottom and controls valve chamber (14), connect in valve seat orifice (29) and control valve chamber (14) and valve rod (10) can be controlled in axial sliding, controlling valve rod (10) middle part to be connected with controlling the armature (8) that valve rod (10) is synchronized with the movement by snap ring (30), armature (8) is positioned at the armature chamber (31) of oil injector body (3)；Described valve seat orifice (29) and control valve chamber (14) junction are provided with the conical surface under valve seat (27), control valve rod (10) bottom and be provided with the conical surface under valve rod (28), when control valve rod (10) is up, under valve rod, the conical surface (28) is formed with the conical surface under valve seat (27) and seals the connection coordinating blocked valve bore (29) with controlling valve chamber (14), when control valve rod (10) is descending, under valve rod, the conical surface (28) departs from the conical surface under valve seat (27) and coordinates the connection got through valve seat orifice (29) with control valve chamber (14)；Valve seat orifice (29) top is provided with the conical surface on valve seat (25), armature (8) lower end is provided with the conical surface under armature (26), when armature (8) is descending, under armature, the conical surface (26) is formed with the conical surface on valve seat (25) and seals the connection coordinating blocked valve bore (29) with armature chamber (31), when armature (8) is up, under armature, the conical surface (26) departs from the conical surface on valve seat (25) and coordinates the connection getting through valve seat orifice (29) with armature chamber (31)；In electromagnetic valve executor (5), it is provided with electric magnet through hole (4), controls valve rod (10) top and stretch in electric magnet through hole (4) and compress the electric magnet spring (6) being positioned in electric magnet through hole (4)；Being provided with oil outlet (12) in control valve seat (9), oil outlet (12) one end connects with fuel-displaced throttle orifice (17), and oil outlet (12) other end connects with valve seat orifice (29)；Being provided with high pressure fuel feed hole (1) in oil injector body (3), be provided with hydraulic oil connecting hole (32) in control valve seat (9), high pressure fuel feed hole (1) is connected with controlling valve chamber (14) and meter in hole (18) by hydraulic oil connecting hole (32).
2. Fuelinjection nozzle as claimed in claim 1, is characterized in that: be provided with adjustment ring (7) in described armature chamber (31), and adjustment ring (7) is pressed between electromagnetic valve executor (5) and control valve seat (9).
3. Fuelinjection nozzle as claimed in claim 1, it is characterized in that: described control valve rod (10) bottom suit buffer spring (13), buffer spring (13) upper end relies on location, the conical surface (28) lower surface under valve rod to support, and buffer spring (13) lower end relies on orifice plate (16) upper surface location to support.
4. Fuelinjection nozzle as claimed in claim 1, is characterized in that: described valve seat orifice (29) a diameter of h2, and controlling valve rod (10) lower end diameter is h1, h2=h1.
5. Fuelinjection nozzle as claimed in claim 1, it is characterized in that: be provided with valve rod mounting groove (15) at orifice plate (16) upper surface, control valve rod (10) bottom stretch in valve rod mounting groove (15) and coordinate with valve rod mounting groove (15) coupling, controlling valve rod (10) center and be provided with valve rod spill port (11), valve rod spill port (11) connects with valve rod mounting groove (15) and electric magnet through hole (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410725742.0A CN104481765B (en) | 2014-12-03 | 2014-12-03 | Fuelinjection nozzle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410725742.0A CN104481765B (en) | 2014-12-03 | 2014-12-03 | Fuelinjection nozzle |
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| CN104481765A CN104481765A (en) | 2015-04-01 |
| CN104481765B true CN104481765B (en) | 2016-08-24 |
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Families Citing this family (12)
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| CN106762277A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of pressure accumulation orifice-plate type electric-controlled fuel injector with ditch |
| CN106704065A (en) * | 2017-01-18 | 2017-05-24 | 哈尔滨工程大学 | Resonant type electronic control fuel injector with engraved groove |
| CN106762281B (en) * | 2017-01-18 | 2023-03-21 | 哈尔滨工程大学 | Electric control oil injector with hydraulic feedback |
| CN106762285A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of On Fluctuations oil return resonant mode electric-controlled fuel injector |
| CN106704064A (en) * | 2017-01-18 | 2017-05-24 | 哈尔滨工程大学 | Double-way oil inflow resonance pore plate type electrically-controlled oil injector |
| CN108506130B (en) * | 2018-04-18 | 2024-06-11 | 莆田市博泰动力设备有限公司 | Fuel injector capable of reducing dynamic leakage of high-pressure common rail fuel |
| CN109751168B (en) * | 2019-03-11 | 2024-05-28 | 无锡格林鲍尔科技有限公司 | High-power-density high-pressure common rail oil sprayer |
| CN110017230B (en) * | 2019-04-17 | 2024-05-28 | 无锡格林鲍尔科技有限公司 | Electrohydraulic combined control quick response type high-pressure common rail fuel injector |
| CN110242460B (en) * | 2019-06-13 | 2021-06-22 | 一汽解放汽车有限公司 | Balanced two-position three-way fuel injection valve |
| CN112796916B (en) * | 2021-03-08 | 2024-03-19 | 钧风电控科技(泰州)有限责任公司 | Valve rod assembly and high-pressure fuel injection valve |
| CN113357066B (en) * | 2021-07-29 | 2022-06-28 | 一汽解放汽车有限公司 | Common rail oil sprayer |
| CN114458506B (en) * | 2022-03-09 | 2022-12-09 | 哈尔滨工程大学 | Electromagnetic-permanent magnet multi-magnetic field combined high-speed electromagnetic valve with gradually increased buffering |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102004015360A1 (en) * | 2004-03-30 | 2005-10-20 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
| DE102007056913A1 (en) * | 2007-11-26 | 2009-05-28 | Robert Bosch Gmbh | Injector for fuel with ball valve |
| DE102010002637A1 (en) * | 2010-03-08 | 2011-09-08 | Robert Bosch Gmbh | Injector i.e. fuel injector, for heat engine i.e. internal combustion engine, has valve connected to control chamber by output channel integrating throttling element to control piston, and valve seat arranged to minimize slipping of parts |
| DE102011084214A1 (en) * | 2011-10-10 | 2013-04-11 | Robert Bosch Gmbh | Control valve for fuel injector e.g. common rail fuel injector, has elastically deformable element that is arranged between sealing sleeve and throttle plate by which sealing sleeve is biased in the axial direction |
| DE102012213535A1 (en) * | 2012-06-29 | 2014-01-02 | Robert Bosch Gmbh | Fuel injector has outer contour whose diameter on case inner surface is smaller than diameter of outer contour on case outer surface |
| DE102012220027A1 (en) * | 2012-11-02 | 2014-05-08 | Robert Bosch Gmbh | Switching valve for common-rail fuel injector for injecting diesel into combustion chamber of internal combustion engine, has control space filled with fuel via hole, and closing element closing hole in position for pressure relief of space |
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- 2014-12-03 CN CN201410725742.0A patent/CN104481765B/en active Active
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| CN104481765A (en) | 2015-04-01 |
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