CN104481765A - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
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- CN104481765A CN104481765A CN201410725742.0A CN201410725742A CN104481765A CN 104481765 A CN104481765 A CN 104481765A CN 201410725742 A CN201410725742 A CN 201410725742A CN 104481765 A CN104481765 A CN 104481765A
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Abstract
The invention relates to a fuel injection valve which is particularly used in a high-pressure common-rail injection system of a diesel engine and used for injecting high-pressure fuel of a high-pressure accumulation chamber into a diesel engine cylinder, and belongs to the technical field of engine fuel injection valves. The fuel injection valve comprises a fuel injector body, a control valve is arranged between the fuel injector body and an orifice plate and comprises a control valve stem and a control valve seat, a valve seat hole and a control valve chamber are arranged in the center of the control valve seat sequentially from top to bottom, the control valve stem capable of sliding axially is connected in the valve seat hole and the control valve chamber, and an armature moving synchronously with the control valve stem is connected to the middle of the control valve stem through a snap ring. Through the control valve, a function that a fuel outlet orifice of the orifice plate is allowed to drain fuel during fuel injection and feed fuel reversely not during fuel injection is realized, the orifice has dual purposes, response speed of the injection valve is increased, and multiple injections is realized favorably.
Description
Technical field
The present invention relates to a kind of Fuelinjection nozzle, specifically 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, belongs to engine fuel injection valve technology field.
Background technique
In order to meet the Abgasgesetz of increasingly stringent, Fuelinjection nozzle diesel emission being played to material impact needs to improve its accuracy of spray and speed of response further.At present, for high-pressure injection system, existing Fuelinjection nozzle controls the opening and closing of needle-valve by control valve.Orifice plate in control valve generally realizes the exchange of the fuel oil in control room with the external world by meter in hole and fuel-displaced throttle orifice.High pressure oil is incorporated in control room the closing forces produced needle-valve by oil inlet hole, and high pressure oil is leaked into low-pressure cavity by oil outlet, reduces needle-valve closing forces.The speed in high pressure fuel turnover control room, directly has influence on 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.
Fuel-displaced throttle orifice flow should be less than at the meter in hole flow of above-mentioned known Fuelinjection nozzle aperture plate, the control to needle-valve opening and closing could be realized, but because meter in hole is to the throttling action of high pressure oil, oil-feed speed is slower, after end of injection, high pressure oil fills control room by meter in hole needs considerable time, and this delay causing needle-valve to be closed is too large, be unfavorable for the accurate control of fuel injection quantity, also bring difficulty to multi-injection.In order to solve the slower problem of control room oil-feed, in injection valve disclosed in EP0976924B1, take a kind of structure of two-position three-way valve, in order to cut-off valve element at the end of injection, piezo actuator can be utilized to open the other passage be connected with high pressure oil, can utilize is fed in control room into and out of oily throttle orifice by fuel simultaneously, can effectively improve oil-feed speed like this, accelerates the closedown of needle-valve.But relative to conventional solenoid valve final controlling element, piezoelectric structure with high costs, reliability also needs further raising.For said structure, if directly make solenoid valve final controlling element into, huge hydraulic coupling cannot be overcome again, working procedure cannot be realized.In addition be configured to the orientation existing problems of mushroom valve element, because two valve seats are arranged in different orifice plates, therefore two orifice plates must critically locate each other, and wherein the sealing of at least one 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 construction cost price is high, poor reliability.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, thus a kind of Fuelinjection nozzle is provided, on the basis adopting traditional solenoid type solenoid valve, the closedown shortening injection valve postpones, improve speed of response, and then also high-precision spraying fire can be carried out when spraying the fuel of more high pressure, and be conducive to the realization of multi-injection.
According to technological scheme provided by the invention, Fuelinjection nozzle comprises oil injector body and the tight cap of oil nozzle, orifice plate and oil nozzle body is provided with in the tight cap of oil nozzle, oil injector body connects the tight cap of oil nozzle, 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 solenoid valve final controlling element, be 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 conical pressure-bearing seat surface near side, firing chamber, and when needle-valve is descending, pressure-bearing seat surface blocking-up spray orifice is communicated with oil nozzle intracoelomic cavity, and when needle-valve is up, pressure-bearing seat surface unlatching spray orifice is communicated with oil nozzle intracoelomic cavity, described orifice plate lower end is provided with sleeve, bushing core is provided with the barrel bore holding needle-valve top, 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 by needle valve spring pressure and orifice plate lower surface close contact, described orifice plate lower surface, sleeve interior surface and needle-valve deviate from the end face formation control room of firing chamber, orifice plate is provided with fuel-displaced throttle orifice and meter in hole, fuel-displaced throttle orifice is communicated with 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 comprises control valve rod and control valve seat, control valve seat center is provided with valve seat orifice from top to bottom successively and controls valve chamber, valve seat orifice and the indoor connection of control valve can control valve rod in axial sliding, control to connect by snap ring the armature be synchronized with the movement with control valve rod 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 joint and be 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 and the conical surface under valve seat formed be sealed and matched blocked valve bore with control being communicated with of valve chamber, control valve rod descending time, under valve rod, the conical surface and the conical surface under valve seat depart to coordinate and get through valve seat orifice and control being communicated with of 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 and the conical surface on valve seat form being communicated with of be sealed and matched blocked valve bore and armature chamber, when armature is up, under armature, the conical surface and valve seat epicone emaciated face get through being communicated with of valve seat orifice and armature chamber from coordinating, in solenoid valve final controlling element, be provided with electromagnet through hole, control valve rod top and stretch into the electromagnet spring also compressing in electromagnet through hole and be arranged in electromagnet through hole, in control valve seat, be provided with oil outlet, oil outlet one end is communicated with fuel-displaced throttle orifice, and the oil outlet the other end is communicated with valve seat orifice, in oil injector body, be provided with high pressure oil inlet hole, be provided with high pressure oil attachment hole in control valve seat, high pressure oil inlet hole is communicated with meter in hole with control valve chamber by high pressure oil attachment hole.
Further, be provided with adjustment ring in armature chamber, adjustment ring is pressed between electromagnet and control valve seat.
Further, control stem lower portion suit damping spring, conical surface lower end surface positioning supports under damping spring upper end dependence valve rod, damping spring lower end relies on orifice plate upper surface positioning supports.
Further, valve seat orifice diameter is h2, and controlling valve rod lower end diameter is h1, h2=h1.
Further, be provided with valve rod mounting groove at orifice plate upper surface, control stem lower portion and to stretch in valve rod mounting groove and to coordinate with the coupling of valve rod mounting groove, control valve rod center is provided with valve rod spill port, and valve rod spill port is communicated with electromagnet through hole with valve rod mounting groove.
Compared with the prior art the present invention has the following advantages:
The fuel-displaced throttle orifice of traditional fuel injection valve is only responsible for the fuel oil of drawing in control room and is realized oil draining function, the present invention is then achieved by control valve and allows the fuel-displaced throttle orifice of orifice plate draining when oil spout, the function of the reverse oil-feed when not oil spout, thus it is dual-purpose to achieve a hole, 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 speed of response of injection valve, be conducive to realizing multi-injection.The present invention adopts traditional solenoid valve final controlling element in addition, and cost is low, technology maturation, and number of spare parts is few, integrated height, is convenient to processing and assembling.
Accompanying drawing explanation
Sectional view in Fig. 1 illustrates the main body 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.
Description of reference numerals: 1-high pressure oil inlet hole, the tight cap of 2-oil nozzle, 3-oil injector body, 4-electromagnet through hole, 5-solenoid valve final controlling element, 6-electromagnet spring, 7-adjustment ring, 8-armature, 9-control valve seat, 10-controls valve rod, 11-valve rod spill port, 12-oil outlet, 13-damping 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-high pressure oil attachment hole, 33-barrel bore, 34-oil nozzle intracoelomic cavity, 35-spring supporting platform, 36-pressure-bearing seat surface, 37-needle-valve pressure-bearing surface.
Embodiment
Embodiment in is by reference to the accompanying drawings further described by the present invention below:
As shown in Figure 1 and 2, the present invention mainly comprises oil injector body 3 and the tight cap 2 of oil nozzle, is provided with orifice plate 16 and oil nozzle body 23 in the tight cap 2 of oil nozzle, oil injector body 3 connects the tight cap 2 of oil nozzle, and by oil nozzle tight cap 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 solenoid valve final controlling element 5, adopts solenoid valve final controlling element 5 not only technology maturation, and with low cost.
Be 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 conical pressure-bearing seat surface 36 near side, firing chamber.
Under needle-valve 22 drives, pressure-bearing seat surface 36 can control unlatching or the closedown of spray orifice 24.When needle-valve 22 is descending, pressure-bearing seat surface 36 blocks being communicated with of spray orifice 24 and oil nozzle intracoelomic cavity 34, and when needle-valve 22 is up, pressure-bearing seat surface 36 opens being communicated with of spray orifice 24 and oil nozzle intracoelomic cavity 34.Fuel under high pressure is ejected in the firing chamber 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 holding needle-valve 22 top, and barrel bore 33 can be formed to support to needle-valve 22 top and can hold again needle-valve 22 top in interior slip.
Needle-valve 22 is set with 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.Sleeve 20 is by needle valve spring 21 pressure and orifice plate 16 lower surface close contact.Needle-valve 22 is axially reciprocating under needle valve spring 21 with the effect of hydraulic coupling, realizes the opening and closing of oil sprayer.
Described orifice plate 16 lower surface, sleeve 20 internal surface and needle-valve 22 deviate from the end face formation control room 19 of firing chamber, and orifice plate 16 is provided with fuel-displaced throttle orifice 17 and meter in hole 18, and fuel-displaced throttle orifice 17 is communicated with control room 19 with lower end, meter in hole 18.
The present invention also comprises the control valve arranged between oil injector body 3 and orifice plate 16, control valve comprises control valve rod 10 and control valve seat 9, control valve seat 9 center is provided with valve seat orifice 29 from top to bottom successively and controls valve chamber 14, and valve seat orifice 29 is connected can controls valve rod 10 in axial sliding with in control valve chamber 14.Control to connect by snap ring 30 armature 8 be synchronized with the movement with control valve rod 10 in the middle part of valve rod 10, armature 8 is positioned at the armature chamber 31 of oil injector body 3.
Adjustment ring 7 is provided with in described armature chamber 30, adjustment ring 7 is pressed between electromagnet 5 and control valve seat 9, by changing the adjustment ring 7 of different-thickness, the air gap between armature 8 and solenoid valve final controlling element 5 can easily be adjusted, rational sealing effect can be reached to make armature 8 with two sealing surfaces up and down in control valve seat 9.
Valve rod mounting groove 15 is provided with at orifice plate 16 upper surface, control valve rod 10 bottom to stretch in valve rod mounting groove 15 and to coordinate with valve rod mounting groove 15 coupling, the object arranging valve rod mounting groove 15 avoids the bottom controlling valve rod 10 directly to contact with the high pressure oil controlled in valve chamber 14, causes controlling valve rod and can not close under large rail pressure.Control valve rod 10 center and be provided with valve rod spill port 11, valve rod spill port 11 is communicated with electromagnet through hole 4 with valve rod mounting groove 15.The oil return of bleeding in valve rod mounting groove 15 from control valve chamber 14 can export in electromagnet through hole 4 by valve rod spill port 11, guides to outside oil sprayer through spill port.
Described valve seat orifice 29 and control valve chamber 14 joint and be 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 and the conical surface under valve seat 27 formed be sealed and matched blocked valve bore 29 with control being communicated with of valve chamber 14, control valve rod 10 descending time, under valve rod, the conical surface 28 and the conical surface under valve seat 27 depart to coordinate and get through valve seat orifice 29 and control being communicated with of valve chamber 14.
Control valve rod 10 bottom suit damping spring 13, the conical surface 28 lower end surface positioning supports under damping spring 13 upper end dependence valve rod, damping spring 13 lower end relies on orifice plate 16 upper surface positioning supports, to compress under valve rod the conical surface 28 with the conical surface 27 under valve seat reduce and control the speed of valve rod 10 in descending process by damping spring 13.
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 and the conical surface on valve seat 25 form being communicated with of be sealed and matched blocked valve bore 29 and armature chamber 31, when armature 8 is up, under armature, the conical surface 26 and the conical surface on valve seat 25 depart to coordinate and get through being communicated with of valve seat orifice 29 and armature chamber 31.
In solenoid valve final controlling element 5, be provided with electromagnet through hole 4, control valve rod 10 top and stretch into the electromagnet spring 6 also compressing in electromagnet through hole 4 and be arranged in electromagnet through hole 4, control the leading role of mating part by electromagnet through hole 4 of valve rod 10 and electromagnet through hole 4.
In control valve seat 9, be provided with oil outlet 12, oil outlet 12 one end is communicated with fuel-displaced throttle orifice 17, and oil outlet 12 the other end is communicated with valve seat orifice 29.High pressure oil inlet hole 1 is provided with in oil injector body 3, high pressure oil attachment hole 32 is provided with in control valve seat 9, high pressure oil inlet hole 1 is communicated with meter in hole 18 with control valve chamber 14 by high pressure oil attachment hole 32, this makes to control valve chamber 14 and is full of high pressure oil all the time in the course of the work, high pressure oil is by meter in hole 18 constantly ramp metering room 19 simultaneously, and the high pressure oil on the other hand 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 in control room 19 periodically reduces and raises, in order to control the opening and closing of needle-valve 22 in control valve opening and closing process.
Described valve seat orifice 29 diameter is h2, controlling valve rod 10 lower end diameter is h1, h2=h1, its objective is no matter when valve rod 10 lifts or closes, the area of contour of the upper and lower surface that the entirety that valve rod 10 forms with armature 8 contacts with high pressure oil is equal, makes to control valve rod 10 suffered hydraulic coupling in high pressure fuel environment and remains balance.The pretightening force of electromagnet spring 6 can be reduced like this, control impact when valve rod 10 is taken a seat, improve the speed of response of valve rod 10 and electromagnet 8, whole scheme is achieved.
Working procedure of the present invention is: when solenoid valve final controlling element 5 is energized, armature 8 rises by electromagnetic force, under armature, the conical surface 26 is separated with the conical surface on valve seat 25, oil discharge passage is opened, and the high pressure oil in control room 19 leaks in the armature chamber 31 of low pressure through fuel-displaced throttle orifice 17, oil outlet 12, valve seat orifice 29.Meanwhile, armature 8 rises and drives the control valve rod 10 that is attached thereto to rise, and under valve rod, the conical surface 28 seals the conical surface 27 under valve seat, and block high pressure oil and flow into valve seat orifice 29 from control valve chamber 14, this makes the pressure in control room 19 reduce rapidly.When the closing forces acting on needle-valve 22 upper-end surface in control room 19 is less than the opening force that oil nozzle intracoelomic cavity 34 mesohigh oil acts on needle-valve pressure-bearing surface 37, needle-valve 22 is opened, and needle-valve 22 and pressure-bearing seat surface 36 are separated, and fuel then sprays into firing chamber through spray orifice 24.
When 5 power-off of solenoid valve final controlling element, control valve rod 10 descending under the effect of electromagnet spring 6, the armature 8 be attached thereto is driven to fall, under armature, the conical surface 26 is enclosed on valve seat on the conical surface 25, and the high pressure 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 27 under valve seat, and control valve chamber 14 and be connected with valve seat orifice 29, high pressure 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, high pressure oil is also constantly being injected in the meter in hole 18 be always connected with high-pressure oil passage in control room 19, fuel pressure in control room 19 improves rapidly, when the closing force acting on needle-valve 22 upper-end surface is greater than the opening force acted 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, the approach that during end of injection, high pressure oil enters control room only has one, meter in hole, boost in pressure in control room is relatively slow, this causes oil spout closedown to postpone larger, and for the present invention, a part of high pressure oil after fuel-displaced throttle orifice and low-pressure cavity disconnect, can also be allowed through its control room of refluxing, add the passage that enters control room, make control room can Recovery and rebuild faster, control needle-valve and to take a seat faster oil-break.
Those skilled in the art easily can recognize other advantage and remodeling.Thus, in broad scope, the present invention is not limited to the detail content, representative device and the schematic embodiment that represent in literary composition and describe.
Claims (5)
1. a Fuelinjection nozzle, comprise oil injector body (3) and the tight cap of oil nozzle (2), orifice plate (16) and oil nozzle body (23) 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 solenoid valve final controlling element (5); Be 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 conical pressure-bearing seat surface (36) near side, firing chamber, when needle-valve (22) is descending, pressure-bearing seat surface (36) blocking-up spray orifice (24) is communicated with oil nozzle intracoelomic cavity (34), when needle-valve (22) is up, pressure-bearing seat surface (36) unlatching spray orifice (24) is communicated with 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) holding needle-valve (22) top, needle-valve (22) is set with needle valve spring (21), 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 by needle valve spring (21) pressure and orifice plate (16) lower surface close contact; Described orifice plate (16) lower surface, sleeve (20) internal surface and needle-valve (22) deviate from the end face formation control room (19) of firing chamber, orifice plate (16) is provided with fuel-displaced throttle orifice (17) and meter in hole (18), fuel-displaced throttle orifice (17) is communicated with control room (19) with meter in hole (18) lower end, control valve is provided with between described oil injector body (3) and orifice plate (16), control valve comprises control valve rod (10) and control valve seat (9), it is characterized in that:
Control valve seat (9) center is provided with valve seat orifice (29) from top to bottom successively and controls valve chamber (14), valve seat orifice (29) can control valve rod (10) in axial sliding with being connected in control valve chamber (14), control valve rod (10) middle part and connected the armature (8) be synchronized with the movement with control valve rod (10) 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) joint and be 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) and the conical surface under valve seat (27) formed be sealed and matched blocked valve bore (29) with control being communicated with of valve chamber (14), control valve rod (10) descending time, under valve rod, the conical surface (28) and the conical surface under valve seat (27) depart from cooperation and get through valve seat orifice (29) and control being communicated with of 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 (26) under armature, when armature (8) is descending, under armature, the conical surface (26) and the conical surface on valve seat (25) form being communicated with of be sealed and matched blocked valve bore (29) and armature chamber (31), when armature (8) is up, under armature, the conical surface (26) and the conical surface on valve seat (25) depart from cooperation and get through being communicated with of valve seat orifice (29) and armature chamber (31); In solenoid valve final controlling element (5), be provided with electromagnet through hole (4), control valve rod (10) top and stretch into the electromagnet spring (6) also compressing in electromagnet through hole (4) and be arranged in electromagnet through hole (4); In control valve seat (9), be provided with oil outlet (12), oil outlet (12) one end is communicated with fuel-displaced throttle orifice (17), and oil outlet (12) the other end is communicated with valve seat orifice (29); In oil injector body (3), be provided with high pressure oil inlet hole (1), be provided with high pressure oil attachment hole (32) in control valve seat (9), high pressure oil inlet hole (1) is communicated with meter in hole (18) with control valve chamber (14) by high pressure oil attachment hole (32).
2. Fuelinjection nozzle as claimed in claim 1, it is characterized in that: be provided with adjustment ring (7) in described armature chamber (30), adjustment ring (7) is pressed between electromagnet (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 damping spring (13), the conical surface (28) lower end surface positioning supports under damping spring (13) upper end dependence valve rod, damping spring (13) lower end relies on orifice plate (16) upper surface positioning supports.
4. Fuelinjection nozzle as claimed in claim 1, is characterized in that: described valve seat orifice (29) diameter is 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 to stretch in valve rod mounting groove (15) and to coordinate with valve rod mounting groove (15) coupling, control valve rod (10) center and be provided with valve rod spill port (11), valve rod spill port (11) is communicated with electromagnet through hole (4) with valve rod mounting groove (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410725742.0A CN104481765B (en) | 2014-12-03 | 2014-12-03 | Fuelinjection nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410725742.0A CN104481765B (en) | 2014-12-03 | 2014-12-03 | Fuelinjection nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN104481765A true CN104481765A (en) | 2015-04-01 |
| CN104481765B CN104481765B (en) | 2016-08-24 |
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| CN201410725742.0A Active CN104481765B (en) | 2014-12-03 | 2014-12-03 | Fuelinjection nozzle |
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Cited By (12)
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| CN106704065A (en) * | 2017-01-18 | 2017-05-24 | 哈尔滨工程大学 | Resonant type electronic control fuel injector with engraved groove |
| 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 |
| CN106762281A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of electric-controlled fuel injector with hydraulic feedback |
| 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 |
| 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 |
| CN108506130A (en) * | 2018-04-18 | 2018-09-07 | 莆田市宏业精密机械有限公司 | Reduce the fuel injector of high-pressure common rail fuel oil dynamic leakage |
| CN109751168A (en) * | 2019-03-11 | 2019-05-14 | 无锡格林鲍尔科技有限公司 | A kind of high power density high pressure common rail injector |
| CN110017230A (en) * | 2019-04-17 | 2019-07-16 | 无锡格林鲍尔科技有限公司 | A kind of electro-hydraulic joint control rapid response type high pressure common rail injector |
| CN110242460A (en) * | 2019-06-13 | 2019-09-17 | 一汽解放汽车有限公司 | A kind of balanced type two-bit triplet fuel injection valve |
| CN112796916A (en) * | 2021-03-08 | 2021-05-14 | 上海钧风电控科技有限公司 | Valve rod assembly and high-pressure fuel injection valve |
| CN113357066A (en) * | 2021-07-29 | 2021-09-07 | 一汽解放汽车有限公司 | Common rail oil sprayer |
| CN114458506A (en) * | 2022-03-09 | 2022-05-10 | 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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| CN108506130A (en) * | 2018-04-18 | 2018-09-07 | 莆田市宏业精密机械有限公司 | Reduce the fuel injector of high-pressure common rail fuel oil dynamic leakage |
| 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 |
| CN109751168A (en) * | 2019-03-11 | 2019-05-14 | 无锡格林鲍尔科技有限公司 | A kind of high power density high pressure common rail injector |
| 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 |
| CN110017230A (en) * | 2019-04-17 | 2019-07-16 | 无锡格林鲍尔科技有限公司 | A kind of electro-hydraulic joint control rapid response type high pressure common rail injector |
| CN110242460A (en) * | 2019-06-13 | 2019-09-17 | 一汽解放汽车有限公司 | A kind of balanced type two-bit triplet fuel injection valve |
| 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 |
| CN112796916A (en) * | 2021-03-08 | 2021-05-14 | 上海钧风电控科技有限公司 | 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 |
| CN113357066A (en) * | 2021-07-29 | 2021-09-07 | 一汽解放汽车有限公司 | Common rail oil sprayer |
| CN114458506A (en) * | 2022-03-09 | 2022-05-10 | 哈尔滨工程大学 | Electromagnetic-permanent magnet multi-magnetic field combined high-speed electromagnetic valve with gradually increased buffering |
| 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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