CN216788584U - Dual-fuel injection valve - Google Patents
Dual-fuel injection valve Download PDFInfo
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- CN216788584U CN216788584U CN202220209643.7U CN202220209643U CN216788584U CN 216788584 U CN216788584 U CN 216788584U CN 202220209643 U CN202220209643 U CN 202220209643U CN 216788584 U CN216788584 U CN 216788584U
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Abstract
The utility model relates to a dual-fuel injection valve, which comprises an intermediate body, wherein the lower part of the intermediate body is tightly attached to a valve body, an inner needle sliding cavity and an outer needle sliding cavity are arranged in the valve body, the outer needle and the inner needle slide in the inner needle sliding cavity and the outer needle sliding cavity, the lower parts of the inner needle sliding cavity and the outer needle sliding cavity are annularly provided with a first fuel injection cavity, the first fuel injection cavity is communicated with a first fuel rail through a first fuel oil path, the bottom end of the valve body is drilled with a first fuel spray hole and a second fuel spray hole, the first fuel spray hole is positioned at the periphery of the second fuel spray hole, the inner ends of the first fuel spray hole and the second fuel spray hole are communicated with the inner needle sliding cavity and the outer end is communicated with the outside; and a second fuel inner sealing surface is arranged on the inner wall of the bottom of the inner and outer needle sliding cavity. The inner needle stroke and the outer needle stroke are independently controlled, so that the injection is more accurate; the two groups of spray holes are arranged on the valve body, so that the positions of the two fuel spray holes can not be changed at all during spraying.
Description
Technical Field
The utility model belongs to the technical field of injection valves, and relates to a dual-fuel injection valve.
Background
With the upgrade of national emission regulations, natural gas is used as one of the alternative fuels, and due to the better cleanness and economy, the gas vehicle is rapidly developed in the traffic direction in recent years, and the sales volume of the gas vehicle is gradually increased.
The existing natural gas engine mainly adopts low-pressure manifold injection, natural gas is injected into an air inlet manifold at the pressure lower than 10bar and is ignited by a spark plug, the heat value efficiency is low, the exhaust temperature is high, diesel oil and natural gas are directly injected into a combustion chamber at the high pressure of 300bar by using a dual-fuel injector through an HPDI (high pressure fuel injection) technology, a small amount of diesel oil is used for ignition, and then 95% of natural gas is injected to be used as a main fuel for combustion to do work.
The nozzle structure for the existing dual-fuel injector is complex, the dead volume of fuel injection is large, the volume of a control cavity is large, and the injection response speed of an inner needle and an outer needle is slow; in the prior art, two groups of spray holes are respectively arranged on an outer needle and a valve body, and when an inner needle and an outer needle jet, the two groups of spray holes can move relatively, so that the positions of two kinds of fuel are not fixed during jetting, and the performance of an engine is influenced; one end of the outer needle in the prior art is a closed end, so that impurities are easy to accumulate, and the difficulty of processing and cleaning is high.
Disclosure of Invention
The utility model aims to provide a dual-fuel injection valve which can independently control and inject two kinds of fuel, and the relative injection positions of the two kinds of fuel are not changed in the injection process. The injection valve has the advantages of simple structure, high injection response speed, and good reliability and manufacturability.
According to the technical scheme provided by the utility model: the fuel injection valve comprises a valve body and an intermediate body located in the valve body, wherein the lower end of the intermediate body is tightly attached to the valve body, an inner needle sliding cavity and an outer needle sliding cavity are arranged in the valve body, the outer needle and the inner needle are arranged in the inner needle sliding cavity and the outer needle sliding cavity in a sliding mode, a first fuel injection cavity is annularly arranged at the lower portion of the inner needle sliding cavity and the lower portion of the outer needle sliding cavity and is communicated with a first fuel rail through a first fuel oil path, a first fuel injection hole and a second fuel injection hole are drilled at the bottom end of the valve body and are located on the periphery of the second fuel injection hole, the inner ends of the first fuel injection hole and the second fuel injection hole are communicated with the inner needle sliding cavity and the outer needle sliding cavity, and the outer end of the first fuel injection hole and the second fuel injection hole are communicated with the outside; the inner wall of the bottom of the inner and outer needle sliding cavity is provided with a second fuel inner sealing surface, a separation sealing surface and a first fuel inner sealing surface, the second fuel inner sealing surface is positioned between a first fuel spray hole and a second fuel spray hole, the separation sealing surface is positioned between the second fuel inner sealing surface and the first fuel spray hole, the first fuel inner sealing surface is positioned between the first fuel spray hole and a first fuel injection cavity, an outer needle spring is arranged between the upper part of the outer needle and the bottom of the valve body, the bottom of the outer needle is provided with an outer needle lower sealing surface which is matched and abutted with the first fuel inner sealing surface, the outer needle is provided with an inner needle sliding hole, the inner needle slides in the inner needle sliding hole, the periphery of the upper part of the inner needle is sleeved with a first separation ring and an inner needle spring from top to bottom, the periphery of the lower part of the inner needle is sleeved with a separation ring spring and a second separation ring from top to bottom, the lower end of the second separation ring is provided with a separation sleeve sealing surface which is matched and abutted with the separation sealing surface, the bottom of the inner needle is provided with an inner needle lower sealing surface which is matched and abutted with the inner sealing surface of the second fuel; a second fuel injection cavity is annularly arranged at the lower part of the inner needle sliding hole and is communicated with a second fuel rail through a second fuel oil way; an inner needle control cavity is formed by the top of the inner needle, the bottom of the intermediate body and the inner periphery of the first partition ring; an outer needle control cavity is surrounded by the inner wall of the upper part of the inner and outer needle sliding cavity, the bottom of the intermediate body, the upper part of the outer needle and the periphery of the upper part of the first partition ring; the inner needle control cavity and the outer needle control cavity are respectively connected to the control valve.
As a further improvement of the utility model, a first intermediate pipeline, a second intermediate pipeline and a third intermediate pipeline are vertically arranged in the intermediate body.
As a further improvement of the utility model, the upper end of the outer needle spring is propped against the bottom of the intermediate body, and the lower end of the outer needle spring is propped against the upper part of the outer needle.
As a further improvement of the utility model, the upper part of the outer needle is provided with a spring sleeve column, and the outer needle is sleeved on the periphery of the spring sleeve column by a spring.
As a further improvement of the utility model, the upper end of the first partition ring is propped against the bottom of the intermediate body, the lower end of the first partition ring is propped against the upper end of the inner needle spring, and the lower end of the inner needle spring is propped against the upper part of the inner needle; the upper end of the separating ring spring is propped against the lower part of the inner needle, and the lower end is propped against the upper end of the second separating ring.
As a further improvement of the utility model, the upper part of the inner needle is provided with an inner needle upper sleeving column, the first separation ring and the inner needle spring are sleeved on the periphery of the inner needle upper sleeving column, the lower part of the inner needle is provided with an inner needle lower sleeving column, and the separation ring spring and the second separation ring are sleeved on the periphery of the inner needle lower sleeving column.
As a further improvement of the utility model, the first fuel oil path comprises a third intermediate pipeline and a second valve body pipeline which are communicated in sequence; the inner end of a second pipeline of the valve body is communicated with a first fuel injection cavity, and the outer end of a third pipeline of the intermediate body is communicated with a first fuel rail; the second fuel oil circuit comprises a first intermediate pipeline, a first valve body pipeline, a first outer needle pipeline and a first inner needle pipeline which are sequentially communicated; the inner end of the inner needle pipeline is communicated with a second fuel injection cavity, and the outer end of the first pipeline of the intermediate body is communicated with a second fuel rail; the first pipeline and the second pipeline of the valve body are arranged in the valve body; the first pipeline of the outer needle is arranged in the outer needle.
The positive progress effect of this application lies in:
The control cavity of the utility model has small volume, high response speed of injection and more accurate injection.
The outer needle of the utility model has openings at two ends, no impurity accumulation, good structural manufacturability and low manufacturing cost.
The structure of the utility model has small dead space volume from sealing to spraying hole, and can effectively reduce tail spraying.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram showing the position structure of the first dead volume of fuel injection and the second dead volume of fuel injection according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the utility model herein. Furthermore, "including" and "having," and like terms, mean that "including" and "having," in addition to those already recited in "including" and "having," other content not already recited in the list; for example, a process, method, system, article, or apparatus that may comprise a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.
Fig. 1-2 include an intermediate body 1, a valve body 2, an outer needle 3, an inner needle 4, a first partition ring 5, a second partition ring 6, an outer needle spring 7, an inner needle spring 8, a partition ring spring 9, and the like.
As shown in fig. 1, the utility model is a dual fuel injection valve, which comprises a valve body 2 and an intermediate body 1 located in the valve body 2, wherein the lower end of the intermediate body 1 is tightly attached to the valve body 2, an inner needle sliding cavity and an outer needle sliding cavity are arranged in the valve body 2, an outer needle 3 and an inner needle 4 are slidably arranged in the inner needle sliding cavity and the outer needle sliding cavity, a first fuel injection cavity 16 is annularly arranged at the lower part of the inner needle sliding cavity and the outer needle sliding cavity, the first fuel injection cavity 16 is communicated with a first fuel rail through a first fuel oil path, a first fuel spray hole 10 and a second fuel spray hole 11 are drilled at the bottom end of the valve body 2, the first fuel spray hole 10 is located at the periphery of the second fuel spray hole 11, the inner ends of the first fuel spray hole 10 and the second fuel spray hole 11 are communicated with the inner needle sliding cavity and the outer end is communicated with the outside. The inner wall of the bottom of the inner needle sliding cavity and the outer needle sliding cavity is provided with a second fuel inner sealing surface, a separation sealing surface and a first fuel inner sealing surface, the second fuel inner sealing surface is positioned between a first fuel spray hole 10 and a second fuel spray hole 11, the separation sealing surface is positioned between the second fuel inner sealing surface and the first fuel spray hole 10, the first fuel inner sealing surface is positioned between the first fuel spray hole 10 and a first fuel spray cavity 16, an outer needle spring 7 is arranged between the upper part of the outer needle 3 and the bottom of the valve body 2, the bottom of the outer needle 3 is provided with an outer needle lower sealing surface which is matched and propped against the first fuel inner sealing surface, an inner needle sliding hole is arranged in the outer needle 3, the inner needle 4 slides in the inner needle sliding hole, the periphery of the upper part of the inner needle 4 is sleeved with a first separation ring 5 and an inner needle spring 8 from top to bottom, the periphery of the lower part of the inner needle 4 is sleeved with a separation ring spring 9 and a second separation ring 6 from top to bottom, the lower end of the second separation ring 6 is provided with a separation sleeve sealing surface which is matched and propped against the separation sleeve sealing surface, the bottom of the inner needle 4 is provided with an inner needle lower sealing surface which is matched and abutted with the inner sealing surface of the second fuel. And a second fuel injection cavity 17 is annularly arranged at the lower part of the inner needle sliding hole, and the second fuel injection cavity 17 is communicated with a second fuel rail through a second fuel oil path. The top of the inner needle 4, the bottom of the intermediate body 1 and the inner periphery of the first partition ring 5 form an inner needle control cavity 12. An outer needle control cavity 13 is formed by the inner wall of the upper part of the inner and outer needle sliding cavity, the bottom of the intermediate body 1, the upper part of the outer needle 3 and the periphery of the upper part of the first partition ring 5. The inner needle control chamber 12 and the outer needle control chamber 13 are connected to a control valve, respectively.
The intermediate body 1 is vertically provided with an intermediate body first pipeline 1-1, an intermediate body second pipeline 1-2 and an intermediate body third pipeline 1-3. One end of the intermediate second pipeline 1-2 is communicated with the inner needle control cavity 12, and the other end is communicated with the control valve.
The upper end of the outer needle spring 7 is propped against the bottom of the intermediate body 1, and the lower end of the outer needle spring 7 is propped against the upper part of the outer needle 3.
In order to ensure the stable installation of the outer needle spring 7, the upper part of the outer needle 3 is provided with a spring sleeve setting column, and the outer needle spring 7 is sleeved on the periphery of the spring sleeve setting column.
The upper end of the first separating ring 5 is propped against the bottom of the intermediate body 1, the lower end is propped against the upper end of the inner needle spring 8, and the lower end of the inner needle spring 8 is propped against the upper part of the inner needle 4.
The upper end of the separating ring spring 9 is propped against the lower part of the inner needle 4, and the lower end is propped against the upper end of the second separating ring 6.
In order to ensure that the first separating ring 5 and the inner needle spring 8 are stably installed, the upper part of the inner needle 4 is provided with an inner needle upper sleeve and a column is arranged, and the first separating ring 5 and the inner needle spring 8 are sleeved on the inner needle upper sleeve and the periphery of the column is arranged. In order to ensure that the separation ring spring 9 and the second separation ring 6 are stably installed, the lower part of the inner needle 4 is provided with an inner needle lower sleeving column, and the separation ring spring 9 and the second separation ring 6 are sleeved on the periphery of the inner needle lower sleeving column.
The first fuel oil path comprises intermediate third pipelines 1-3 and a valve body second pipeline 18 which are communicated in sequence. The inner end of the second pipeline 18 of the valve body is communicated with the first fuel injection cavity 16, and the outer end of the third pipeline 1-3 of the intermediate body is communicated with the first fuel rail.
The second fuel oil circuit comprises an intermediate body first pipeline 1-1, a valve body first pipeline 14, an outer needle first pipeline 20 and an inner needle pipeline 15 which are sequentially communicated. The inner end of the inner needle pipeline 15 is communicated with a second fuel injection cavity 17, and the outer end of the intermediate body first pipeline 1-1 is communicated with a second fuel rail.
The first valve body pipeline 14 and the second valve body pipeline 18 are arranged in the valve body 2.
The outer needle first line 20 opens into the outer needle 3.
As shown in fig. 2, a first dead volume 19 of fuel injection is formed between the valve body 2, the outer needle 3, and the second separator 6, and a second dead volume 21 of fuel injection is formed between the valve body 2 and the inner needle 4.
The first fuel is preferably a fuel gas and the second fuel is preferably an oil fuel.
In a static state of the injection valve, the inner needle 4 is subjected to the spring pretightening force of the inner needle spring 8, the lower end of the inner needle is tightly pressed on the valve body 2, the outer needle 3 is subjected to the spring pretightening force of the outer needle spring 7, the lower end of the outer needle is tightly pressed on the valve body 2, the second partition ring 6 is subjected to the spring pretightening force of the partition ring spring 9, the lower end of the second partition ring is tightly pressed on the valve body 2, and the lower sealing surface of the inner needle is abutted to the inner sealing surface of second fuel. The inner needle control chamber 12 and the outer needle control chamber 13 are respectively connected to a control valve, the first fuel injection chamber 16 is communicated with the valve body second pipeline 18, and the second fuel injection chamber 17 is communicated with the valve body first pipeline 14 and the inner needle pipeline 15.
The working principle is as follows: the dual-fuel injection valve for the dual-fuel injector is characterized in that in an initial state, the pressure in an inner needle control cavity 12 and an outer needle control cavity 13 is equal to the pressure of a second fuel rail, the lower end of an inner needle 4 is pressed on a valve body 2 under the combined action of the spring pretightening force of an inner needle spring 8, the hydraulic pressure in the inner needle control cavity 12 and the hydraulic pressure in a second fuel injection cavity 17, the lower sealing surface of the inner needle is abutted against the inner sealing surface of the second fuel to isolate the second fuel injection cavity 17 from a second fuel spray hole 11, and the lower end of an outer needle 3 is pressed on the valve body 2 under the combined action of the spring pretightening force of an outer needle spring 7, the hydraulic pressure in the outer needle control cavity 13 and the hydraulic pressure in a first fuel injection cavity 16, and the inner sealing surface of the first fuel is abutted against the lower sealing surface of the outer needle to isolate the first fuel injection cavity 16 from the first fuel spray hole 10.
When the pressure in the outer needle control chamber 13 drops to a certain target value, the hydraulic pressure in the first fuel injection chamber 16 is greater than the spring pre-tightening force of the outer needle spring 7 and the hydraulic pressure in the outer needle control chamber 13, the outer needle 3 moves upwards, the moving stroke is limited by the bottom plane of the intermediate body 1, the inner sealing surface of the first fuel is separated from the lower sealing surface of the outer needle, the first fuel injection chamber 16 is communicated with the first fuel injection hole 10, and the first fuel is injected into the combustion chamber through the first fuel injection hole 10.
When the pressure in the inner needle control cavity 12 is reduced to a certain target value, the hydraulic pressure in the second fuel injection cavity 17 is larger than the spring pre-tightening force of the inner needle spring 8 and the hydraulic pressure in the inner needle control cavity 12, the inner needle 4 moves upwards, the moving stroke is limited by the bottom plane of the intermediate body 1, the lower sealing surface of the inner needle is separated from the inner sealing surface of the second fuel, the second fuel injection cavity 17 is communicated with the second fuel jet hole 11, and the second fuel is injected into the combustion chamber through the second fuel jet hole 11.
In the injection process, the second separating ring 6 is always subjected to the spring pre-tightening force of the separating ring spring 9 and the hydraulic pressure in the second fuel injection cavity 17, and the lower end of the second separating ring is pressed on the valve body 2, so that the first fuel and the second fuel are prevented from mutually leaking.
When the pressure in the control chambers 13, 12 is re-established, the outer needle 3 is pressed against the valve body 2 again under the combined action of the spring preload of the outer needle spring 7, the hydraulic pressure in the outer needle control chamber 13 and the hydraulic pressure in the first fuel injection chamber 16, and the first fuel injection is ended. The inner needle 4 is pressed on the valve body 2 again under the action of the combined force of the pre-tightening force of the spring, the hydraulic pressure in the inner needle control cavity 12 and the hydraulic pressure in the second fuel injection cavity 17, and the second fuel injection is finished.
By controlling the sequence of pressure changes in the control chambers 13, 12, the injection sequence of the first and second fuels can be controlled, the outer and inner needle strokes are independent of each other, and the injection of the two fuels does not interfere with each other. Two groups of fuel spray holes are all arranged on the valve body 2, the spray positions of two fuels can not be changed, and meanwhile, the second separating ring is continuously pressed on the valve body 2 to prevent the first fuel and the second fuel from mutually leaking.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the utility model, and these modifications and improvements are also considered to be within the scope of the utility model.
Claims (7)
1. The dual-fuel injection valve is characterized by comprising a valve body (2) and an intermediate body (1) located in the valve body (2), wherein the lower end of the intermediate body (1) is tightly attached to the valve body (2), an inner needle sliding cavity and an outer needle sliding cavity are arranged in the valve body (2), an outer needle (3) and an inner needle (4) are arranged in the inner needle sliding cavity and the outer needle sliding cavity in a sliding mode, a first fuel injection cavity (16) is annularly arranged at the lower portion of the inner needle sliding cavity and the outer needle sliding cavity, the first fuel injection cavity (16) is communicated with a first fuel rail through a first fuel oil path, a first fuel injection hole (10) and a second fuel injection hole (11) are drilled at the bottom end of the valve body (2), the first fuel injection hole (10) is located on the periphery of the second fuel injection hole (11), the inner ends of the first fuel injection hole (10) and the second fuel injection hole (11) are communicated with the inner needle sliding cavity and the outer end is communicated with the outside; the inner wall of the bottom of the inner needle sliding cavity and the outer needle sliding cavity is provided with a second fuel inner sealing surface, a separation sealing surface and a first fuel inner sealing surface, the second fuel inner sealing surface is positioned between a first fuel spray hole (10) and a second fuel spray hole (11), the separation sealing surface is positioned between the second fuel inner sealing surface and the first fuel spray hole (10), the first fuel inner sealing surface is positioned between the first fuel spray hole (10) and a first fuel spray cavity (16), an outer needle spring (7) is arranged between the upper part of the outer needle (3) and the bottom of the valve body (2), the bottom of the outer needle (3) is provided with an outer needle lower sealing surface which is matched and abutted with the first fuel inner sealing surface, an inner needle sliding hole is arranged in the outer needle (3), the inner needle (4) slides in the inner needle sliding hole, the periphery of the upper part of the inner needle (4) is sleeved with a first separation ring (5) and an inner needle spring (8) from top to bottom, the periphery of the lower part of the inner needle (4) is sleeved with a separation ring spring (9) from top to bottom, The lower end of the second separating ring (6) is provided with a separating sleeve sealing surface which is matched and abutted against the separating sealing surface, and the bottom of the inner needle (4) is provided with an inner needle lower sealing surface which is matched and abutted against the second fuel inner sealing surface; a second fuel injection cavity (17) is annularly arranged at the lower part of the inner needle sliding hole, and the second fuel injection cavity (17) is communicated with a second fuel rail through a second fuel oil path; an inner needle control cavity (12) is formed by the top of the inner needle (4), the bottom of the intermediate body (1) and the inner periphery of the first partition ring (5); an outer needle control cavity (13) is surrounded by the inner wall of the upper part of the inner and outer needle sliding cavity, the bottom of the intermediate body (1), the upper part of the outer needle (3) and the periphery of the upper part of the first partition ring (5); the inner needle control cavity (12) and the outer needle control cavity (13) are respectively connected to the control valve.
2. The dual fuel injection valve as claimed in claim 1, characterized in that the intermediate body (1) has vertically opened therein an intermediate body first conduit (1-1), an intermediate body second conduit (1-2) and an intermediate body third conduit (1-3).
3. The dual fuel injection valve as claimed in claim 1, characterized in that the upper end of the outer needle spring (7) abuts against the bottom of the intermediate body (1) and the lower end of the outer needle spring (7) abuts against the upper part of the outer needle (3).
4. The dual fuel injection valve as claimed in claim 1, characterized in that the upper part of the outer needle (3) is provided with a spring-sleeved post, and the outer needle spring (7) is sleeved on the periphery of the spring-sleeved post.
5. The dual fuel injection valve as claimed in claim 1, characterized in that the first spacer ring (5) bears with its upper end against the bottom of the intermediate body (1) and with its lower end against the upper end of the inner needle spring (8), the lower end of the inner needle spring (8) bearing against the upper part of the inner needle (4); the upper end of the separating ring spring (9) is propped against the lower part of the inner needle (4), and the lower end is propped against the upper end of the second separating ring (6).
6. The dual fuel injection valve as claimed in claim 1, wherein the upper portion of the inner needle (4) is provided with an inner needle upper sleeving column, the first separation ring (5) and the inner needle spring (8) are sleeved on the outer circumference of the inner needle upper sleeving column, the lower portion of the inner needle (4) is provided with an inner needle lower sleeving column, and the separation ring spring (9) and the second separation ring (6) are sleeved on the outer circumference of the inner needle lower sleeving column.
7. A dual fuel injection valve as claimed in claim 1, characterized in that the first fuel circuit comprises an intermediate third conduit (1-3), a valve body second conduit (18) communicating in succession; the inner end of a second pipeline (18) of the valve body is communicated with a first fuel injection cavity (16), and the outer end of a third pipeline (1-3) of the intermediate body is communicated with a first fuel rail; the second fuel oil circuit comprises an intermediate first pipeline (1-1), a valve body first pipeline (14), an outer needle first pipeline (20) and an inner needle pipeline (15) which are sequentially communicated; the inner end of the inner needle pipeline (15) is communicated with a second fuel injection cavity (17), and the outer end of the intermediate first pipeline (1-1) is communicated with a second fuel rail; the valve body first pipeline (14) and the valve body second pipeline (18) are arranged in the valve body (2); the first pipeline (20) of the outer needle is arranged in the outer needle (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220209643.7U CN216788584U (en) | 2022-01-25 | 2022-01-25 | Dual-fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220209643.7U CN216788584U (en) | 2022-01-25 | 2022-01-25 | Dual-fuel injection valve |
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| Publication Number | Publication Date |
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| CN216788584U true CN216788584U (en) | 2022-06-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202220209643.7U Active CN216788584U (en) | 2022-01-25 | 2022-01-25 | Dual-fuel injection valve |
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| Country | Link |
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| CN (1) | CN216788584U (en) |
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2022
- 2022-01-25 CN CN202220209643.7U patent/CN216788584U/en active Active
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