CN221053833U - Needle valve coupler of common rail fuel injector - Google Patents
Needle valve coupler of common rail fuel injector Download PDFInfo
- Publication number
- CN221053833U CN221053833U CN202323212985.8U CN202323212985U CN221053833U CN 221053833 U CN221053833 U CN 221053833U CN 202323212985 U CN202323212985 U CN 202323212985U CN 221053833 U CN221053833 U CN 221053833U
- Authority
- CN
- China
- Prior art keywords
- needle valve
- valve body
- side wall
- annular cavity
- common rail
- 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.)
- Active
Links
- 239000000446 fuel Substances 0.000 title abstract description 20
- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims description 34
- 230000000903 blocking effect Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 abstract description 14
- 238000005457 optimization Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model relates to the technical field of fuel injection systems, in particular to a needle valve coupling of a common rail fuel injector, which comprises a needle valve body, wherein a pressure chamber is formed in the inner bottom end of the needle valve body, a plurality of fuel injection holes communicated with the pressure chamber are formed in the lower end of the outer side wall of the needle valve body, a needle valve is arranged in the needle valve body, the lower end surface of the needle valve is fixedly connected with a needle valve conical surface, a first fuel inlet channel is formed in the upper end surface of the needle valve body, a first annular cavity is formed in the needle valve body, an annular cavity is formed between the inner side wall and the outer side wall of the needle valve body, the lower end of the first fuel inlet channel is communicated with the upper end of the annular cavity, a plurality of evenly distributed diversion holes are communicated with the outer side wall of the first annular cavity, and then liquid entering the needle valve body evenly enters the cavity between the needle valve and the first annular cavity when the needle valve coupling of the common rail fuel injector is used conveniently, and the uniformity of fuel injection is improved.
Description
Technical Field
The utility model relates to the technical field of fuel injection systems, in particular to a needle valve coupler of a common rail fuel injector.
Background
With the continuous improvement of the emission level of the whole vehicle and the increasing requirements on the fuel economy of the vehicle and the low noise of an engine, a high-pressure common rail system is widely applied to a diesel engine or an electronic injection gasoline engine from the implementation of national III emission regulations of the vehicle, and in the traditional high-pressure common rail fuel injector, a needle valve coupler is the most critical structural component in the whole fuel supply system.
The needle valve coupling part of the existing common rail fuel injector is characterized in that an oil inlet channel for oil inlet is formed in a needle valve body, and the oil inlet channel is communicated with an annular cavity;
However, when the liquid in the oil inlet channel directly enters the annular cavity through the oil inlet channel, the entering liquid easily flows downwards from one side close to the oil inlet channel, the needle valve body and the needle valve, so that the oil inlet between the needle valve body and the needle valve is unevenly distributed, and the liquid is unevenly sprayed when being sprayed out through a plurality of spray holes, and therefore, a needle valve even part of a common rail oil sprayer is needed to be provided to solve the problems.
Disclosure of utility model
The utility model aims to provide a needle valve coupling of a common rail oil injector, which has the characteristics that liquid entering the needle valve body can conveniently and uniformly enter a cavity between the needle valve and a first annular cavity, and the uniformity of oil injection is improved.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a needle valve even piece of common rail sprayer, includes the needle valve body, the pressure chamber has been seted up to the inside bottom of the needle valve body, a plurality of fuel injection holes with the pressure chamber intercommunication have been seted up to the lateral wall lower extreme of the needle valve body, the inside of the needle valve body is provided with the needle valve, the lower terminal surface fixedly connected with needle valve conical surface of needle valve, first oil feed passageway has been seted up to the up end of the needle valve body, first annular cavity has been seted up to the inside of the needle valve body, annular cavity has been seted up between the inside wall of the needle valve body and the lateral wall, the lower extreme and the upper end intercommunication of annular cavity of first oil feed passageway, the lower extreme intercommunication of annular cavity has a plurality of evenly distributed's branch discharge orifice, a plurality of the other end and the lateral wall intercommunication of first annular cavity of branch discharge orifice.
In order to conveniently play a role in protecting the lower end of a needle valve body after the use, and avoid the problem of blockage caused by dust entering the needle valve body through a plurality of oil injection holes, the needle valve coupler of the common rail oil injector is preferable in the utility model, the lower end of the outer side wall of the needle valve body is fixedly connected with an external thread seat, the outer side wall of the external thread seat is provided with a protective shell, and the lower end of the needle valve body is positioned in the protective shell.
In order to conveniently limit the continuous upward movement of the protective shell, the needle valve coupler of the common rail fuel injector is preferably characterized in that a blocking ring is fixedly connected to the outer side wall of the needle valve body, and the upper ends of the protective shell and the external thread seat are tightly attached to the lower end of the blocking ring.
In order to avoid abrasion of the outer wall of the needle valve body by the protective housing when the outer wall of the needle valve body is rotated and screwed, the needle valve coupling member of the common rail fuel injector is preferably characterized in that the inner diameter of the protective housing is larger than the outer diameter of the needle valve body.
In order to avoid the problem that the hand is easy to slip with the protective shell, the needle valve coupler of the common rail fuel injector is preferably provided with the anti-slip patterns fixedly connected with the outer side wall of the protective shell.
In order to facilitate the rotation and screwing installation of the protective shell on the external thread seat, the needle valve coupler of the common rail fuel injector is preferably characterized in that the upper end of the inner side wall of the protective shell is fixedly connected with an internal thread.
Compared with the prior art, the utility model has the following beneficial effects:
When the oil injection valve is used, liquid enters the annular cavity through the first oil inlet channel, then enters the cavity between the needle valve and the first annular cavity uniformly through the plurality of arranged flow dividing holes, flows downwards, is sprayed out through the plurality of oil spraying holes, and further, when the needle valve coupling of the common rail oil injector is used conveniently, the liquid entering the needle valve body uniformly enters the cavity between the needle valve and the first annular cavity, so that the uniformity of oil injection is improved.
Drawings
FIG. 1 is a cross-sectional view of a prior art right angle seal cone needle valve coupling;
FIG. 2 is an overall block diagram of the present utility model;
FIG. 3 is a cross-sectional view of the present utility model
Fig. 4 is an enlarged view of fig. 3a in accordance with the present utility model.
In the figure: 1. a needle valve body; 101. a first annular cavity; 102. an annular cavity; 103. a first oil inlet passage; 104. a diversion aperture; 105. a pressure chamber; 106. an oil injection hole; 2. a needle valve; 201. conical surface of needle valve; 3. an external thread seat; 301. a protective housing; 302. a blocking ring; 303. anti-skid lines; 4. a second needle valve body; 401 a second needle valve; 402. a second annular cavity; 403. and the second oil inlet duct.
Detailed Description
Referring to fig. 1 to 4, a needle valve coupling of a common rail injector includes a needle valve body 1, a pressure chamber 105 is provided at the bottom end of the interior of the needle valve body 1, a plurality of oil injection holes 106 communicated with the pressure chamber 105 are provided at the lower end of the outer side wall of the needle valve body 1, a needle valve 2 is provided in the interior of the needle valve body 1, a needle valve conical surface 201 is fixedly connected to the lower end surface of the needle valve 2, a first oil inlet channel 103 is provided at the upper end surface of the needle valve body 1, a first annular cavity 101 is provided in the interior of the needle valve body 1, an annular cavity 102 is provided between the inner side wall and the outer side wall of the needle valve body 1, the lower end of the first oil inlet channel 103 is communicated with the upper end of the annular cavity 102, a plurality of evenly distributed flow dividing holes 104 are communicated with the lower end of the annular cavity 102, and the other ends of the plurality of flow dividing holes 104 are communicated with the outer side wall of the first annular cavity 101.
In this embodiment: as shown in fig. 1, in the prior art, a needle valve coupling of a conventional common rail injector is formed by opening a second oil inlet channel 403 for oil inlet in a second needle valve body 4, and the second oil inlet channel 403 is communicated with a second annular cavity 402; however, when the liquid in the second oil inlet duct 403 directly enters the second annular cavity 402 through the second oil inlet duct 403, the entering liquid easily flows downwards from the side close to the second oil inlet duct 403 and the second needle valve body 4 and the second needle valve 401, so that the oil inlet between the second needle valve body 4 and the second needle valve 401 is unevenly distributed, and the liquid is unevenly sprayed when being sprayed out through a plurality of spray holes;
When the oil inlet valve is used, liquid enters through the first oil inlet channel 103, then enters into the annular cavity 102, then uniformly enters into a cavity between the needle valve 2 and the first annular cavity 101 through the plurality of distribution holes 104, and then flows downwards, and is sprayed out through the plurality of oil spraying holes 106, so that when the needle valve coupler of the common rail oil sprayer is used conveniently, the liquid entering into the needle valve body 1 uniformly enters into the cavity between the needle valve 2 and the first annular cavity 101, and the uniformity of oil spraying is improved.
As a technical optimization scheme of the utility model, the lower end of the outer side wall of the needle valve body 1 is fixedly connected with an external thread seat 3, the outer side wall of the external thread seat 3 is provided with a protective shell 301, and the lower end of the needle valve body 1 is positioned in the protective shell 301.
In this embodiment: after the needle valve even piece of the common rail oil sprayer is used, the outer thread seat 3 arranged on the outer wall of the needle valve body 1 is used, the protective shell 301 is rotatably arranged on the outer wall of the outer thread seat 3, the lower end of the needle valve body 1 after the use is convenient to play a protective role, and the problem that dust enters the needle valve body 1 through the plurality of oil injection holes 106 to cause blockage is avoided.
As a technical optimization scheme of the utility model, the outer side wall of the needle valve body 1 is fixedly connected with a blocking ring 302, and the upper ends of the protective shell 301 and the external thread seat 3 are tightly attached to the lower end of the blocking ring 302.
In this embodiment: when the protective shell 301 is installed in an outward rotating mode, the blocking ring 302 is convenient to limit the continuous upward movement of the protective shell 301.
As a technical optimization scheme of the present utility model, the inner diameter of the protective housing 301 is larger than the outer diameter of the needle valve body 1.
In this embodiment: the inner diameter of the protective shell 301 is larger than the outer diameter of the needle valve body 1, so that abrasion of the protective shell 301 to the outer wall of the needle valve body 1 is avoided when the protective shell 301 is screwed on the outer wall of the needle valve body 1.
As a technical optimization scheme of the present utility model, the outer side wall of the protective housing 301 is fixedly connected with anti-skid patterns 303.
In this embodiment: by the anti-slip patterns 303, the problem that the hand is easy to slip with the protective housing 301 is avoided.
As a technical optimization scheme of the present utility model, an inner thread is fixedly connected to the upper end of the inner side wall of the protective housing 301.
In this embodiment: by means of the internal thread, the protective housing 301 is conveniently installed on the external thread seat 3 in a rotary screwing mode.
Working principle: during the use, liquid gets into through first oil feed passageway 103, then enter into annular chamber 102, evenly enter into the cavity between needle valve 2 and the first annular cavity 101 through a plurality of branch flow holes 104 that set up immediately in the downflow, and spout through a plurality of nozzle openings 106, and then the liquid that gets into in needle valve body 1 when the needle valve even piece of common rail sprayer when using is convenient evenly enters into the cavity between needle valve 2 and the first annular cavity 101, after this needle valve even piece of common rail sprayer uses, through the external screw thread seat 3 that sets up at needle valve body 1 outer wall, and install protective housing 301 at external screw thread seat 3 outer wall rotation, conveniently continue upwards to remove protective housing 301 through the baffle ring 302 and play spacing effect.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. Needle valve coupling for a common rail injector, comprising a needle valve body (1), characterized in that: the novel oil injection valve comprises a needle valve body (1), and is characterized in that a pressure chamber (105) is formed in the bottom end of the needle valve body (1), a plurality of oil injection holes (106) communicated with the pressure chamber (105) are formed in the lower end of the outer side wall of the needle valve body (1), a needle valve (2) is arranged in the needle valve body (1), a needle valve conical surface (201) is fixedly connected to the lower end face of the needle valve (2), a first oil inlet channel (103) is formed in the upper end face of the needle valve body (1), a first annular cavity (101) is formed in the needle valve body (1), an annular cavity (102) is formed between the inner side wall and the outer side wall of the needle valve body (1), the lower end of the first oil inlet channel (103) is communicated with the upper end of the annular cavity (102), a plurality of evenly distributed flow distribution holes (104) are formed in the lower end of the annular cavity (102), and the other ends of the flow distribution holes (104) are communicated with the outer side wall of the first annular cavity (101).
2. The needle valve coupling of a common rail injector of claim 1, wherein: the needle valve is characterized in that an external thread seat (3) is fixedly connected to the lower end of the outer side wall of the needle valve body (1), a protective shell (301) is mounted on the outer side wall of the external thread seat (3), and the lower end of the needle valve body (1) is located inside the protective shell (301).
3. A needle valve coupling for a common rail injector as defined in claim 2, wherein: the outer side wall of the needle valve body (1) is fixedly connected with a blocking ring (302), and the upper ends of the protective shell (301) and the external thread seat (3) are tightly attached to the lower end of the blocking ring (302).
4. A needle valve coupling for a common rail injector as defined in claim 2, wherein: the inner diameter of the protective shell (301) is larger than the outer diameter of the needle valve body (1).
5. A needle valve coupling for a common rail injector as defined in claim 2, wherein: the outer side wall of the protective shell (301) is fixedly connected with anti-skid patterns (303).
6. A needle valve coupling for a common rail injector as defined in claim 2, wherein: the upper end of the inner side wall of the protective shell (301) is fixedly connected with an internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323212985.8U CN221053833U (en) | 2023-11-28 | 2023-11-28 | Needle valve coupler of common rail fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323212985.8U CN221053833U (en) | 2023-11-28 | 2023-11-28 | Needle valve coupler of common rail fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221053833U true CN221053833U (en) | 2024-05-31 |
Family
ID=91203586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323212985.8U Active CN221053833U (en) | 2023-11-28 | 2023-11-28 | Needle valve coupler of common rail fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221053833U (en) |
-
2023
- 2023-11-28 CN CN202323212985.8U patent/CN221053833U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202852884U (en) | Double-oil-line centrifugal atomization jet device | |
| JPH0452391B2 (en) | ||
| CN221053833U (en) | Needle valve coupler of common rail fuel injector | |
| CN108730089B (en) | Engine fuel sprayer | |
| CN107916973A (en) | SCR urea sprays protection system | |
| CN207598319U (en) | Metering injection valve of engine post-processing system | |
| JPH07265751A (en) | Attachment for air spray gun | |
| CN104612875A (en) | Novel high flow injector nozzle matching parts of common rail injector | |
| JPS6338374Y2 (en) | ||
| CN202756152U (en) | Connecting structure of oil atomizer body and oil inlet connector | |
| CN207413649U (en) | Skylight lubricating oil automatic oil spout system atomizer | |
| CN208294688U (en) | A kind of new type gasoline nozzle that atomization is excellent | |
| CN212054957U (en) | Oil injector body | |
| CN209818186U (en) | Filter assembly of injection rail air inlet nozzle | |
| CN205868583U (en) | Fuel is atomizer and fuel atomization joint and fuel filtration guide arm in advance | |
| CN102135025A (en) | Direct injection metering injection device | |
| CN104896288B (en) | Atomizer | |
| CN212132972U (en) | Three-spiral channel water nozzle | |
| CN214499281U (en) | Fuel injector body of diesel engine | |
| CN210796840U (en) | Fuel injection nozzle of refueling machine | |
| CN201363218Y (en) | Internal-combustion engine fuel injection device | |
| CN213205869U (en) | Double-oil pump built-in far-end oil absorption fuel pump assembly | |
| CN111140418A (en) | High-temperature-resistant anti-corrosion automobile fuel injector | |
| CN219502994U (en) | Air injection type shower head | |
| CN215566341U (en) | High-dispersion oil nozzle for oil injector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |