CN109681360A - A kind of long needle-valve for fuel injection valve - Google Patents
A kind of long needle-valve for fuel injection valve Download PDFInfo
- Publication number
- CN109681360A CN109681360A CN201910148543.0A CN201910148543A CN109681360A CN 109681360 A CN109681360 A CN 109681360A CN 201910148543 A CN201910148543 A CN 201910148543A CN 109681360 A CN109681360 A CN 109681360A
- Authority
- CN
- China
- Prior art keywords
- valve
- needle
- restriction portion
- valve body
- flat position
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of long needle-valves for fuel injection valve, the longitudinally movable setting of the long needle-valve is in needle-valve body mesoporous, minute hand valve head is provided with needle-valve sealing cone, the conical surface is matched with the needle-valve body sealing cone inside needle-valve body, needle-valve body head is located at needle-valve body sealing cone section and is provided with several spray orifices, the minute hand valve head is provided with guide section and restriction portion with the couple cooperation each other of needle-valve body mesoporous, the flat position of several restriction portions is provided at restriction portion circumference, flow area is formed between flat position and the inner wall of needle-valve body mesoporous, the area S1 of the flow area and the ratio of the sum of all nozzle hole areas are t.Present invention can ensure that long needle-valve maintains reasonable pressure difference up and down during the work time, the chatter in motion process is avoided, improves the accuracy of spray and stability of fuel injector, and structure is relatively simple, economy with higher.
Description
Technical field
The present invention relates to engine fuel injection valve technology field, specially a kind of long needle-valve for fuel injection valve.
Background technique
1, disclosed in the CN103423049A in injector assembly, a kind of typical fuel injector structure form is given, this is total
It is split-type design at middle control piston and oil nozzle needle-valve, needle-valve top is in contact with control piston lower portion and is placed in a low pressure chamber
Interior, due to the presence of low pressure chamber, with the raising of rail pressure, which has a large amount of leakage, causes a large amount of
Oil pump power loss, and due to being relatively lagged behind using the response speed of separate structure, fuel injector.
2, to meet higher pressure needs, currently, fuel injector design inclination is in the structure type of no static leakage.
CN101743394(B a kind of typical structure of the fuel injector of long needle-valve) is disclosed, which is provided with a band on needle-valve head
Have the throttle valve of sharp edge, by relevant parameter is limited, it can be achieved that needle-valve throttling effect do not influenced by environment temperature,
So that accuracy of spray stable and consistent.However, the representative instance does not control the throttling size of the throttle valve effectively, it should
Choke pressure drop size caused by throttle valve is most important for the jetting stability of fuel oil, when the pressure drop is too low, especially exists
Under high rail pressure operating condition, easily cause fuel-injected unstable, so that engine is unable to satisfy the requirement of regulation, and the structure exists
Very high to requirement on machining accuracy in actual processing, processing cost is high.
Design structure of the fuel injection valve of present mainstream using control piston and oil nozzle needle-valve fission, the spray of this structure
There are low pressure chambers for oily device, and high pressure oil causes the damage of high pressure oil energy into low pressure chamber by couple clearance leakage at work
It loses, to waste the effective power of oil pump, engine, and split type structure causes movement parts to increase, ties down needle valve movement
Response speed；
In existing long needle valve structure fuel injection valve, it is equipped with throttling valve system, choke pressure drop size pair caused by throttle valve
It is most important in the jetting stability of fuel oil, but in the prior art, the stability problem of throttling is only focused on, and be not known and propose
Pressure drop magnitude range caused by throttling especially under high rail pressure operating condition, easily causes fuel oil to spray when the pressure drop is too low
It is unstable so that engine is unable to satisfy the requirement of regulation, and the scheme of the prior art is in actual processing, to machining accuracy
It is required that very high, processing cost is high.
Summary of the invention
It is an object of the present invention to overcome the above deficiencies, to provide a kind of long needle-valve fuel injection valve, uses
Structure without static fuel leakage effectively reduces the power loss of high-pressure oil pump, is designed using the long needle valve structure of integral type,
Improve the response speed of fuel injector, while the clear stipulaties throttling range of needle-valve restriction portion, by the determination of throttling range,
So that a reasonable pressure drop range is generated above and below restriction portion, to guarantee that fuel oil can carry out in stably and controllable range
Injection, reliably and effectively reduces engine emission, in addition, the long needle valve structure that the present invention designs is simple, work in-process can make
It is realized with lesser cost, economy with higher.
A kind of long needle-valve for fuel injection valve, the longitudinally movable setting of the long needle-valve are long in needle-valve body mesoporous
Needle-valve head is provided with needle-valve sealing cone, which matches with the needle-valve body sealing cone inside needle-valve body,
Needle-valve body head is located at needle-valve body sealing cone section and is provided with several spray orifices, it is characterised in that: the minute hand valve head be provided with
The guide section and restriction portion of needle-valve body mesoporous couple cooperation each other, are provided with the flat position of several restriction portions at restriction portion circumference, throttle
Flow area S1, the area S1 and all nozzle hole areas of the flow area are formed between the flat position of section and the inner wall of needle-valve body mesoporous
The sum of ratio be t.
Further, the ratio t of the sum of the flow cross-section areas S1 of restriction portion and all nozzle hole areas is controlled 1~7
Range.
Further, the no less than one flat position of restriction portion is provided at restriction portion circumference, multiple flat positions of restriction portion are being saved
Flow section even circumferential arrangement.
Further, the restriction portion is preferable to provide 3 or 4 flat positions of restriction portion, the flat position of restriction portion can be used flat
Face, concave surface or convex surface.
Further, the length L of restriction portion is controlled in 0.5~5 mm range.
Further, the circumferential direction of guide section is also equipped with the flat position of several guide sections, the flat position of guide section can be used plane,
Concave surface or convex surface.
Further, a flow area is also constituted between the flat position of guide section and the inner wall of needle-valve body mesoporous, the flow area
Area and the ratio of the sum of all nozzle hole areas should be greater than 8.
Compared with the existing technology, the invention has the following advantages that
1, the guide section of long needle-valve, the contour structures of restriction portion are devised, defines the circulation area and nozzle hole area of restriction portion
The sum of ratio in the range of 1~7, stablize long needle-valve can more smoothly during the motion, ensure that fuel injector spray
The precision and stability penetrated define throttling segment length within the scope of 0.5~5 mm, it is ensured that pressure drop is not with the extraneous ring such as temperature
The variation in border and change；
2, using fuel injector structure of the long needle-valve of integral type without static leakage, movement parts are few, and structure is simple, reduce engine function
The loss of rate；
3, structure is simple, easy to process, at low cost.
Detailed description of the invention
The embodiment in attached drawing the present invention is described in detail will be passed through below, it will help understand the purpose of the present invention and excellent
Point, in which:
Fig. 1 long needle-valve injector assembly structure sectional view.
The enlarged diagram of Fig. 2 injector nozzle matching parts part.
Fig. 3 is cross-sectional view of 3 flat positions of guide section using cross section where restriction portion under concave surface.
Fig. 4 is cross-sectional view of 3 flat positions of guide section using cross section where restriction portion under plane surface.
Fig. 5 is cross-sectional view of 3 flat positions of guide section using cross section where restriction portion under convex surface.
Fig. 6 is cross-sectional view of 4 flat positions of guide section using cross section where restriction portion under concave surface.
Description of symbols: description of symbols: 1- electromagnet, 2- armature, 3- seal bead, 4- oil inlet metering-orifice, 5- tune
Pressing spring, 6- high pressure chest, 7- oil injector body, 8- needle-valve body, 9- needle-valve sealing cone, 10- spray orifice, 11- binding post, 12- electromagnetism
Iron spring, 13- control valve seat, the fuel-displaced metering-orifice of 14-, 15- control chamber, 16- valve pocket, 17- fuel feed hole, 18- long needle-valve, 19- guiding
Section, 20- restriction portion, 21- needle-valve body sealing cone, the flat position of 22- guide section, the flat position of 23- restriction portion, 24- needle-valve body counterbore, 25-
Needle-valve body mesoporous.
Specific embodiment
The present invention will be further described in conjunction with the embodiment in attached drawing below:
If Fig. 1-6 shows, Fig. 1 shows a kind of fuel injection valve section of long needle valve.The fuel injection valve mainly includes electromagnetism
Iron 1, electromagnet spring 12, armature 2, sealing bead 3, valve pocket 16, pressure spring 5, oil injector body 7, long needle-valve 18, needle-valve body 8,
Components, the valve pockets 16 such as 9 needle-valve sealing cones, 10 spray orifices, 11 binding posts, 14 fuel-displaced metering-orifices are axially pressed in spray by control valve seat 13
In the cavity on oily 7 top of body, 16 lower part of valve pocket is extended into the high pressure chest 6 inside oil injector body 7, the end face quilt of needle-valve body 8
It is pressed on the lower end surface of oil injector body 7, several spray orifices 10 is provided on needle-valve body 8, fuel oil can spray into combustion by this some holes
Burn room；Long 18 top of needle-valve is matched with the mesoporous of valve pocket 16, and the lower part of long needle-valve 18 is matched with needle-valve body mesoporous 25, pressure regulation
5 one end of spring is in contact with the lower end surface of valve pocket 16, and one end is in contact with the flange on long needle-valve 18, and long needle-valve 18 is compressed
On needle-valve body sealing cone 21 inside needle-valve body 8, what armature 2 was axially movable is arranged in the mesoporous of control valve seat 13,
Bead 3 is pressed on the sealing cone of 16 oil outlet of valve pocket by electromagnet spring 12 through armature 2,16 inner hole of valve pocket and long needle-valve 18
Top surround control chamber 15.
The fuel injection valve of the long needle valve structure is static No leakage formula structure, and long needle-valve 18 is located at the height of needle-valve body 7
It presses in chamber 6, the surrounding of the non-mating surface part of valve rod is immersed in high pressure oil, and fuel oil can enter high pressure chest 6 by fuel feed hole 17
It is interior, needle-valve body sealing is on the one hand flowed into through needle-valve body counterbore 24, the flat position 22 of guide section, the flat position 23 of restriction portion downwards by high pressure chest 6
It at the conical surface 21, on the other hand upwards by high pressure chest 6, through oil inlet metering-orifice 4, enters in control chamber 15, there is no height for total
The static leakage of pressure oil.The working principle prior art of the fuel injection valve discloses already, and which is not described herein again.
Fig. 2 shows the enlarged drawing of fuel injection valve oil nozzle part, the head of long 18 oil nozzle part of needle-valve is provided with and needle
The guide section 19 and restriction portion 20 of the couple cooperation each other of valve body mesoporous 25.
Fig. 3 shows the cross-sectional view of restriction portion place cross section, and no less than one section is provided at 20 circumference of restriction portion
The flat position 23 of section is flowed, multiple flat positions 23 of restriction portion are arranged in 20 even circumferential of restriction portion.It is general to throttle according to the practical experience of engineering
Section 20 is preferable to provide 3 or the flat position 23 of 4 restriction portions, and the flat position 23 of restriction portion can use plane, concave surface as needed
Or convex surface design.
Flow area is formed between the flat position 23 of restriction portion and the inner wall of needle-valve body mesoporous 25, fuel oil can be through under this flow area
Rush down at needle-valve body sealing cone 21, the area of flow area is set as S1(as seen in figures 3-6), have to the flowing of fuel oil aobvious
The throttling action of work.During fuel oil is flowed through from the flat position 23 of restriction portion, the region A of 20 upstream of restriction portion and the B area in downstream
Between generate significant pressure drop, the pressure drop for long needle-valve form fuel injector have important influence:
On the one hand, the presence of pressure drop can make to obtain between needle-valve body sealing cone 21 and needle-valve sealing cone 9 lesser hydraulic
Power, when closed, long needle-valve 18 is located at active force downward suffered by the top of control chamber 15 and is greater than long needle-valve such fuel injector
Upward active force suffered by 18 oil nozzle parts, to ensure that the normal switching-off of fuel injector.
On the other hand, if the pressure drop in the area A and the area B is smaller, needle-valve can encounter larger resistance during closing downlink
Power, it is most likely that cause needle-valve that chatter occurs during the motion, so that oil mass injection is unstable.However, when pressure difference is super
A certain range is crossed, theoretically the movement of needle-valve can be more smooth, but biggish pressure difference also implies that restriction loss is big, i.e., pressure is damaged
It loses greatly, both the atomizing effect of fuel oil is adversely affected in this way, also creates biggish energy loss.
To make restriction portion 20 generate above-mentioned reasonable pressure difference, the flow cross-section areas S1 of restriction portion 20 and all 10 faces of spray orifice
The ratio t of the sum of product should be within the scope of 1~7.
In addition, to guarantee the pressure loss of fuel injector 20 upstream and downstream of restriction portion during the work time not with the change of ambient temperature
Change and change, the length L of restriction portion 20 should be within the scope of 0.5~5 mm here.
Guide section 19 may be disposed at the upstream or downstream of restriction portion 20, and as its name suggests, the main function of this section is just to aid in
Long needle-valve 18 can be reliably oriented in needle-valve body 8.
Similar with restriction portion 20, the circumferential direction of guide section 19 is also equipped with the flat position 22 of several guide sections, is preferable to provide 3 here
Plane, concave surface or convex surface can be used in a flat position 22 of guide section, the flat position 22 of guide section.
The setting of the flat position 22 of guide section and the setting purpose of the flat position 23 of restriction portion on the contrary, the former based on circulation, the latter with
Based on throttling.
A flow area, the area of the flow area are also constituted between the flat position 22 of guide section and the inner wall of needle-valve body mesoporous 25
Apparent throttling cannot be generated to the fuel oil that flows through, with guarantee fuel oil can stablize, enough supplies.It is unnecessary to avoid
Throttling, setting referring herein to the flat position 23 of restriction portion, it is specified that the sum of 10 area of area and all spray orifices of flow area ratio
Value should be greater than 8.
Long needle-valve scheme proposed by the invention reduces the energy loss of high pressure oil using the form of no static leakage,
The working efficiency for improving engine is reduced movement parts quantity, is improved response speed using the long needle valve structure of integral type；
The restriction portion 20 of minute hand valve head and the size and shape of guide section 19 have been clearly defined, by flow area Quantitative design,
Guarantee that long needle-valve maintains reasonable pressure drop in the upstream and downstream region of the flat position 23 of restriction portion, so that the closing process of fuel injector is smooth,
Injection process is stably and controllable, on the other hand, is also provided to the shape and size of the flat position of guide section 22, for the steady of long needle-valve
Fixed movement and the continual and steady supply of oil mass provide effective support.
To sum up, the present invention is conducive to improve accuracy of spray, response speed and the stability of fuel injector, while of the invention setting
It is simple to count structure, it is easy to process, good volume production effect may be implemented.
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of long needle-valve for fuel injection valve, the setting which can vertically move is in needle-valve body mesoporous (25)
In, long needle-valve (18) head is provided with needle-valve sealing cone (9), the needle-valve of the needle-valve sealing cone (9) and needle-valve body (8) inside
Body sealing cone (21) matches, and needle-valve body (8) head is located at needle-valve body sealing cone (21) section and is provided with several spray orifices (10),
It is characterized by: long needle-valve (18) head be provided with needle-valve body mesoporous (25) each other couple cooperation guide section (19) and
Restriction portion (20), is provided with the flat position of several restriction portions (23) at restriction portion (20) circumference, in the flat position of restriction portion (23) and needle-valve body
Flow area S1, the area S1 of the flow area and the ratio of the sum of all spray orifices (10) area are formed between the inner wall in hole (25)
Value is t.
2. a kind of long needle-valve for fuel injection valve as described in claim 1, which is characterized in that the circulation of restriction portion (20)
Range of the ratio t control of the sum of area of section S1 and all spray orifices (10) area 1~7.
3. a kind of long needle-valve for fuel injection valve as described in claim 1, which is characterized in that at restriction portion (20) circumference
It is provided with the no less than one flat position of restriction portion (23), multiple flat positions of restriction portion (23) are arranged in restriction portion (20) even circumferential.
4. a kind of long needle-valve for fuel injection valve as claimed in claim 3, which is characterized in that the restriction portion (20) is excellent
Perhaps 4 flat positions of the flat position of restriction portion (23) restriction portion (23) use plane, concave surface or convex surface for the setting 3 of choosing.
5. a kind of long needle-valve for fuel injection valve as described in claim 1, which is characterized in that the length of restriction portion (20)
L is controlled in 0.5~5 mm range.
6. a kind of long needle-valve for fuel injection valve as described in claim 1, which is characterized in that the circumferential direction of guide section (19)
It is also equipped with the flat position of several guide sections (22), the flat position of guide section (22) uses plane, concave surface or convex surface.
7. a kind of long needle-valve for fuel injection valve as claimed in claim 6, which is characterized in that the flat position of guide section (22) with
Also constitute a flow area between the inner wall of needle-valve body mesoporous (25), the area of the flow area and all spray orifices (10) area it
The ratio of sum should be greater than 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148543.0A CN109681360A (en) | 2019-02-28 | 2019-02-28 | A kind of long needle-valve for fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148543.0A CN109681360A (en) | 2019-02-28 | 2019-02-28 | A kind of long needle-valve for fuel injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109681360A true CN109681360A (en) | 2019-04-26 |
Family
ID=66197178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910148543.0A Pending CN109681360A (en) | 2019-02-28 | 2019-02-28 | A kind of long needle-valve for fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109681360A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120171A (en) * | 2019-12-06 | 2020-05-08 | 一汽解放汽车有限公司 | Fuel injection valve assembly |
| CN115003904A (en) * | 2020-01-23 | 2022-09-02 | 株式会社电装 | Fuel injection valve |
| WO2024067738A1 (en) * | 2022-09-28 | 2024-04-04 | 中国船舶集团有限公司第七一一研究所 | Electronically controlled fuel injector and internal combustion engine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04342869A (en) * | 1991-05-17 | 1992-11-30 | Nissan Motor Co Ltd | Fuel injection nozzle |
| EP0556803A1 (en) * | 1992-02-18 | 1993-08-25 | Nippondenso Co., Ltd. | Fuel injector |
| DE10117861A1 (en) * | 2001-04-10 | 2002-10-24 | Bosch Gmbh Robert | Fuel injector for injecting fuel into internal combustion engine combustion chambers has nozzle needle with at least one guide section and in form of choke point near nozzle seat |
| JP2005083237A (en) * | 2003-09-08 | 2005-03-31 | Nippon Soken Inc | Injector for internal combustion engine |
| CN101743394A (en) * | 2007-07-13 | 2010-06-16 | 罗伯特·博世有限公司 | Throttle on a valve needle of a fuel injection valve for internal combustion engines |
| CN102282354A (en) * | 2009-01-14 | 2011-12-14 | 罗伯特·博世有限公司 | Fuel injector for internal combustion engines |
| CN104265534A (en) * | 2014-08-05 | 2015-01-07 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil injecting speed-variable common rail system oil injector |
| US20150345450A1 (en) * | 2014-05-31 | 2015-12-03 | Cummins Inc. | Restrictive flow passage in common rail injectors |
-
2019
- 2019-02-28 CN CN201910148543.0A patent/CN109681360A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04342869A (en) * | 1991-05-17 | 1992-11-30 | Nissan Motor Co Ltd | Fuel injection nozzle |
| EP0556803A1 (en) * | 1992-02-18 | 1993-08-25 | Nippondenso Co., Ltd. | Fuel injector |
| DE10117861A1 (en) * | 2001-04-10 | 2002-10-24 | Bosch Gmbh Robert | Fuel injector for injecting fuel into internal combustion engine combustion chambers has nozzle needle with at least one guide section and in form of choke point near nozzle seat |
| JP2005083237A (en) * | 2003-09-08 | 2005-03-31 | Nippon Soken Inc | Injector for internal combustion engine |
| CN101743394A (en) * | 2007-07-13 | 2010-06-16 | 罗伯特·博世有限公司 | Throttle on a valve needle of a fuel injection valve for internal combustion engines |
| CN102282354A (en) * | 2009-01-14 | 2011-12-14 | 罗伯特·博世有限公司 | Fuel injector for internal combustion engines |
| US20150345450A1 (en) * | 2014-05-31 | 2015-12-03 | Cummins Inc. | Restrictive flow passage in common rail injectors |
| CN104265534A (en) * | 2014-08-05 | 2015-01-07 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil injecting speed-variable common rail system oil injector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120171A (en) * | 2019-12-06 | 2020-05-08 | 一汽解放汽车有限公司 | Fuel injection valve assembly |
| CN115003904A (en) * | 2020-01-23 | 2022-09-02 | 株式会社电装 | Fuel injection valve |
| WO2024067738A1 (en) * | 2022-09-28 | 2024-04-04 | 中国船舶集团有限公司第七一一研究所 | Electronically controlled fuel injector and internal combustion engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109681360A (en) | A kind of long needle-valve for fuel injection valve | |
| CN101680413B (en) | Control valve for a fuel injection valve | |
| CN104018969B (en) | Piezoelectricity controls pressure accumulation type voltage regulation fuel injector | |
| US8186609B2 (en) | Fuel injector having an additional outlet restrictor or having an improved arrangement of same in the control valve | |
| CN202900503U (en) | Novel aperture atomizer for diesel engine | |
| CN104018966A (en) | Pressure accumulation flow-limiting type electromagnetic control oil sprayer | |
| CN104018964A (en) | Pressure accumulation flow-limiting type piezoelectric control oil sprayer | |
| CN101184916B (en) | Fuel injection valve for internal combustion engines | |
| CN104265532B (en) | Control valve for fuel injector | |
| CN104481767A (en) | Novel common-rail oil injector | |
| CN111120171B (en) | Fuel injection valve assembly | |
| CN203175733U (en) | Control jet flat valve structure of electronic control fuel injector | |
| CN107061088A (en) | A kind of New Common Rail fuel injector | |
| CN104033299B (en) | A kind of common-rail injector | |
| CN203892092U (en) | Pressure accumulating and flow limiting electromagnetic control oil atomizer | |
| CN109209712A (en) | A kind of fuel injector and fuel injection system | |
| CN104775954B (en) | Oil-return-free common-rail injector controlled by electromagnetic valve | |
| CN112502879A (en) | Fuel injection valve | |
| CN105351115B (en) | No leakage voltage control standard fuel gas ejecting device | |
| CN103047061A (en) | Controlled injection flat valve mechanism of electrical oil injector | |
| CN104265533A (en) | Novel common rail oil injector | |
| CN107917030B (en) | Control valve of common rail oil injector | |
| CN108443040A (en) | Medium and heavy-duty engines monomer crosspointer valve twin-jet nozzle high pressure common rail injector | |
| CN209604181U (en) | A kind of high power density high pressure common rail injector | |
| CN203925839U (en) | Pressure accumulation current-limiting type piezoelectric control fuel injector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190426 |