CN114629009A - Spark plug sleeve assembly, spark plug assembly and engine - Google Patents
Spark plug sleeve assembly, spark plug assembly and engine Download PDFInfo
- Publication number
- CN114629009A CN114629009A CN202210146793.2A CN202210146793A CN114629009A CN 114629009 A CN114629009 A CN 114629009A CN 202210146793 A CN202210146793 A CN 202210146793A CN 114629009 A CN114629009 A CN 114629009A
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- China
- Prior art keywords
- spark plug
- mounting sleeve
- sleeve
- assembly
- lower mounting
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/02—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/02—Details
- H01T13/08—Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/40—Sparking plugs structurally combined with other devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention discloses a spark plug sleeve assembly, a spark plug assembly and an engine. The spark plug sleeve component is arranged between a valve chamber cover and a cylinder cover of an engine and comprises a lower mounting sleeve, an upper mounting sleeve and a safety pressing plate. The upper mounting sleeve is provided with a first pipe orifice and a second pipe orifice, the first pipe orifice is connected with the safety pressing plate, the second pipe orifice is in butt joint fit with the lower mounting sleeve, and the lower mounting sleeve is mounted inside the cylinder cover. And the safety pressure plate is provided with an inner hole, the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug, and the spark plug is prevented from popping up due to overhigh explosion pressure in the cylinder, so that peripheral equipment and personnel are prevented from being injured.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a spark plug sleeve assembly, a spark plug assembly and an engine.
Background
Currently, in natural gas fueled engines, the fuel is ignited by a spark plug. For medium and heavy gas engines, the spark plug is typically mounted in the cylinder head and in a spark plug boot to isolate the cooling fluid inside the cylinder head. The natural gas engine has the requirement of replacing the spark plug regularly, and the working environment of the spark plug requires isolating media such as cooling water, lubricating oil and the like, so that reliable sealing around the spark plug is very important for the reliability of the natural gas engine.
In the prior art, the conventional spark plug sleeve is generally divided into an integral type and a segmented combination type, the integral type spark plug sleeve has better sealing performance, but has high machining precision requirement due to too long dimension. The sectional combined spark plug sleeve has better overall manufacturability, but has high design requirement on the sealing reliability of a joint in order to prevent gas containing lubricating oil mist in a valve chamber from being released to the surrounding environment to cause pollution.
Moreover, when the performance index (such as air-fuel ratio, compression ratio, explosion pressure, etc.) of the engine is high or the rotating speed is high, detonation or detonation is particularly easy to occur, and the abnormal increase of the gas pressure in the cylinder can cause the ejection of the spark plug or the spark plug sleeve component, so that peripheral equipment and personnel can be injured, and the safety performance is poor.
Therefore, it is an urgent problem to be solved by those skilled in the art to produce a safe and environment-friendly spark plug sleeve assembly for a gas engine, which can be applied to an engine with high power and high performance index, and to prevent the spark plug or the spark plug sleeve assembly from popping up.
Disclosure of Invention
In order to solve the problems, the invention provides a spark plug sleeve assembly of a gas engine, which can prevent a spark plug from popping up due to abnormal increase of gas pressure in a cylinder and protect the safety of peripheral personnel and equipment.
The technical scheme provided by the invention is as follows:
a spark plug sleeve component is arranged between a valve chamber cover and a cylinder cover of an engine and comprises a lower mounting sleeve, an upper mounting sleeve and a safety pressing plate;
the upper mounting sleeve is provided with a first pipe orifice and a second pipe orifice, the first pipe orifice is connected with the safety pressure plate, the second pipe orifice is in butt joint fit with the lower mounting sleeve, and the lower mounting sleeve is mounted inside the cylinder cover;
the safety pressure plate is provided with an inner hole, and the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug.
In some embodiments, the joint of the safety pressure plate and the first pipe orifice is provided with an external thread, and the inner side wall of the first pipe orifice is provided with an internal thread corresponding to the area of the external thread of the safety pressure plate;
the safety pressing plate is connected with the upper mounting sleeve in a screwed mode through threads.
In some embodiments, the outer side wall of the lower mounting sleeve close to one end of the upper mounting sleeve is provided with an external thread, and the cylinder cover is provided with an internal thread corresponding to the external thread region of the lower mounting sleeve;
the lower mounting sleeve is screwed with the cylinder cover through threads;
and the outer side wall of the lower mounting sleeve is in contact with the cooling liquid in the cylinder cover water channel.
In some embodiments, at least two first sealing rings are circumferentially arranged on the outer side wall of the lower mounting sleeve above the water channel.
In some embodiments, the first nozzle outer sidewall extends outwardly to form a shoulder;
the valve chamber cover compresses the upper mounting sleeve by compressing the shoulder, and fixes and limits the upper mounting sleeve.
In some embodiments, the second nozzle is inserted into the lower mounting sleeve.
In some embodiments, a second seal ring is disposed between the upper and lower mounting sleeves.
In some embodiments, a third seal ring is disposed between the shoulder and the valve chamber cover.
The invention also provides a spark plug assembly, which comprises a spark plug sleeve assembly and a spark plug arranged in the spark plug sleeve assembly, wherein the spark plug sleeve assembly is the spark plug sleeve assembly;
wherein the spark plug is disposed within the lower mounting sleeve with an end portion extending beyond the lower mounting sleeve;
the outer side wall of the extending part of the spark plug is provided with an external thread, the cylinder cover is provided with an internal thread corresponding to the external thread area of the spark plug, and the spark plug is screwed with the cylinder cover through the thread.
The invention further provides an engine which comprises the spark plug assembly, the valve chamber cover and the cylinder cover, wherein the spark plug assembly is the spark plug assembly, and the engine is a gas engine.
Compared with the prior art, the spark plug sleeve assembly, the spark plug assembly and the engine provided by the invention have the following beneficial effects:
1. according to the spark plug sleeve assembly, the spark plug assembly and the engine, the safety pressing plate is connected with the first pipe orifice of the upper mounting sleeve, the safety pressing plate is provided with the inner hole, the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug, the spark plug assembly can be effectively prevented from popping out of the safety pressing plate due to abnormal increase of gas pressure in the cylinder, and the mounting reliability of the spark plug sleeve assembly is improved.
2. According to the spark plug sleeve assembly, the spark plug assembly and the engine, the outer side wall of the first pipe orifice extends outwards to form a shoulder, the valve chamber cover compresses the shoulder, so that the upper installation sleeve is compressed, the upper installation sleeve is fixed and limited, the reliability of installation of the spark plug sleeve assembly is further improved, and the spark plug sleeve assembly is effectively prevented from being popped up due to abnormal increase of gas pressure in the cylinder and causing damage to peripheral equipment and personnel.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic illustration of the installation of the product of the present invention;
fig. 2 is a structural schematic diagram of a lower installation sleeve of the product of the invention.
The reference numbers illustrate:
100. a spark plug sleeve assembly; 110. a sleeve is arranged at the lower part; 111. a second seal ring; 112. a first seal ring; 120. installing a sleeve; 121. a first nozzle; 122. a second orifice; 123. a shoulder; 124 a third seal ring; 130. a safety pressing plate;
200. a spark plug;
300. a valve chamber cover;
400. a cylinder cover; 410. a water channel.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "a" means not only "only one of this but also a case of" more than one ".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
Referring to fig. 1, a spark plug sleeve assembly 100, as an example, is a three-segment assembly 100, which is installed between a valve chamber cover 300 and a cylinder head 400 of an engine, and includes a lower mounting sleeve 110, an upper mounting sleeve 120, and a safety pressure plate 130. In this embodiment, the upper mounting sleeve 120 has a first nozzle 121 and a second nozzle 122, wherein the first nozzle 121 is connected to the safety pressure plate 130, the second nozzle 122 is in butt-fit with the lower mounting sleeve 110, and the lower mounting sleeve 110 is mounted inside the cylinder head 400.
Wherein the inner hole diameter of the safety pressure plate 130 is smaller than the maximum outer diameter of the spark plug 200. Because knocking or knocking is particularly likely to occur when the performance index (such as air-fuel ratio, compression ratio, explosion pressure, etc.) of the engine is high or the rotation speed is high, the abnormally increased gas pressure in the cylinder causes the ignition plug 200 to pop up, which may cause damage to peripheral equipment and personnel. The inner hole diameter of the safety pressure plate 130 in the embodiment is smaller than the outer diameter of the spark plug 200, so that the spark plug 200 can be effectively prevented from popping out of the safety pressure plate 130, and the installation reliability of the spark plug sleeve assembly 100 is improved.
Moreover, only one safety pressure plate 130 is additionally arranged, so that the structure is simple, and the manufacturing and processing are convenient.
In actual production, the inner hole diameter of the safety pressure plate 130 is smaller than the maximum outer diameter of the spark plug 200, and the lead of the spark plug 200 can pass through the inner hole diameter without being limited too much.
In addition, the safety pressure plate 130 and the valve chamber cover 300 may be fixedly connected, and the inner hole is coaxial with the upper mounting sleeve 120, so as to prevent the spark plug 200 from popping out, and simultaneously prevent the lower mounting sleeve 110 and the upper mounting sleeve 120 from popping out.
In one embodiment, the connection between the safety pressure plate 130 and the first pipe orifice 121 is provided with an external thread, and the inner side wall of the first pipe orifice 121 is provided with an internal thread corresponding to the external thread area of the safety pressure plate 130, and the two are connected by screwing, so that the assembly is simple. In actual production, the connection mode of the safety pressure plate 130 and the upper installation sleeve 120 is various, and the safety pressure plate and the upper installation sleeve can also be prepared by welding, riveting and the like, and the safety pressure plate and the upper installation sleeve can also be prepared by adopting an integrated forming method.
Correspondingly, the outer side wall of one end, close to the upper mounting sleeve 120, of the lower mounting sleeve 110 is provided with an external thread, the cylinder cover 400 is provided with an internal thread corresponding to the external thread area of the lower mounting sleeve 110, the lower mounting sleeve 110 and the internal thread are connected through threaded tightening, the connection effect is optimal through the threaded tightening of fine threads, and self-locking and looseness prevention are facilitated. Water course 410 has been seted up on cylinder cap 400 for place the coolant liquid, at this moment, the contact of coolant liquid in the lateral wall of lower mounting sleeve 110 and the cylinder cap 400 water course 410, the heat on spark plug cover subassembly 100 is taken away to the coolant liquid to lower temperature to spark plug cover subassembly 100, and then lower temperature to the spark plug 200 of installing in spark plug cover subassembly 100, realize the heat dissipation of spark plug 200, make spark plug 200 work under suitable state, further increase spark plug cover subassembly 100's security performance.
The fine threads also provide a seal to reduce the likelihood of leakage, thereby preventing gas in the valve chamber cover 300 from entering the water channel 410 of the cylinder head 400 and coolant in the water channel 410 of the cylinder head 400 from flowing into the valve chamber cover 300.
Preferably, the lower mounting sleeve 110 is made of a copper-nickel alloy material, so that the heat conduction performance is better, the heat load of the spark plug 200 can be more effectively transmitted to the cooling liquid of the water channel 410 of the cylinder cover 400 through the outer side wall of the lower mounting sleeve 110, the heat load of the spark plug 200 is reduced, and the safety performance is improved.
In one embodiment, at least two first sealing rings 112 are circumferentially arranged on the outer side wall of the lower mounting sleeve 110 above the water channel 410 to prevent the coolant in the water channel 410 of the cylinder cover 400 from entering the valve chamber cover 300 in an axial sealing manner, so as to dilute and damage the engine oil.
In actual production, the number of the first sealing rings 112 can be changed according to specific situations, and the sealing function can be achieved, so that the cooling liquid in the water channel 410 of the cylinder cover 400 can be prevented from entering the valve chamber cover 300.
In one embodiment, the outer sidewall of the first nozzle 121 of the upper mounting sleeve 120 extends outwardly to form a shoulder 123. At this time, the valve chamber cover 300 presses the upper mounting sleeve 120 by pressing the shoulder 123, thereby fixing and restricting the upper mounting sleeve 120.
The upper installation sleeve 120 is pressed through the valve chamber 300, the installation reliability of the spark plug sleeve assembly 100 can be further improved, and the situation that the upper installation sleeve 120 and the lower installation sleeve 110 are popped up due to abnormal increase of gas pressure in the cylinder and damage is caused to peripheral equipment and personnel is effectively avoided.
Preferably, the second nozzle 122 of the upper mounting sleeve 120 is inserted into the lower mounting sleeve 110 under the pressure of the valve chamber cover, so that the connection between the upper mounting sleeve 120 and the lower mounting sleeve 110 is realized, and the structure is simple. And compared with the threaded connection, the sealing performance is better.
In this embodiment, only the optimal solution is adopted, and in the actual production process, the upper mounting sleeve 120 and the lower mounting sleeve 110 can also be screwed or fixed by bolts through threads, and at this time, the valve chamber cover 300 compresses the upper mounting sleeve 120, and it can also be ensured that the upper mounting sleeve 120 and the lower mounting sleeve 110 cannot pop up due to abnormal increase of gas pressure in the cylinder.
In order to prevent or minimize the entry of oil and oil vapor from the valve cover 300 into the spark plug sleeve assembly 100 through the gap between the upper mounting sleeve 120 and the lower mounting sleeve 110, thereby affecting the normal operation of the spark plug 200, a second seal ring 111 is provided between the upper mounting sleeve 120 and the lower mounting sleeve 110.
Specifically, a circle of sealing groove is formed in the lower mounting sleeve 110 close to the inner wall of the second pipe orifice 122 and used for placing a second sealing ring 111, when the upper mounting sleeve second pipe orifice 122 is inserted into the lower mounting sleeve 110 under the pressure action of the valve chamber cover 300, the inner side wall and the outer side wall of the second sealing ring 111 are respectively in contact with the outer side wall of the upper mounting sleeve 120 and the inner wall of the lower mounting sleeve 110, and therefore the sealing effect is achieved.
In actual production, when the connection is screwed, the sealing can be enhanced by adopting fine threads; when bolted, a soft gasket may be provided to enhance sealing.
Correspondingly, the third sealing ring 124 is arranged between the upper mounting sleeve 120 and the valve chamber cover 300, so that gas containing lubricating oil mist in the valve chamber cover 300 can be effectively prevented from being released to the surrounding environment, the surrounding environment is prevented from being polluted, and the environment is protected.
The present invention also provides a spark plug assembly including a spark plug sleeve assembly 100 and a spark plug 200 disposed within the spark plug sleeve assembly. Wherein the spark plug sleeve assembly 100 is the spark plug sleeve assembly 100 of any of the above embodiments.
Specifically, the spark plug 200 is placed in the lower mounting sleeve 110 with one end portion protruding out of the lower mounting sleeve 110. And the outer side wall of the extension part is provided with external threads, the cylinder cover 400 is provided with internal threads corresponding to the external thread area of the spark plug 200, and the spark plug 200 and the cylinder cover 400 are connected by screw thread tightening.
The invention also provides an engine, which comprises a spark plug assembly, a valve chamber cover 300 and a cylinder cover 400, wherein the spark plug assembly is the spark plug assembly in the embodiment, and the engine is preferably a gas engine, and compared with a diesel engine, the reliability is higher, and the performance is better.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A spark plug bushing assembly for mounting between a valve chamber cover and a cylinder head of an engine, comprising:
the lower installation sleeve, the upper installation sleeve and the safety pressing plate are arranged on the lower installation sleeve;
the upper mounting sleeve is provided with a first pipe orifice and a second pipe orifice, the first pipe orifice is connected with the safety pressure plate, the second pipe orifice is in butt joint fit with the lower mounting sleeve, and the lower mounting sleeve is mounted inside the cylinder cover;
the safety pressure plate is provided with an inner hole, and the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug.
2. The spark plug boot assembly of claim 1,
the joint of the safety pressure plate and the first pipe orifice is provided with an external thread, and the inner side wall of the first pipe orifice is provided with an internal thread corresponding to the external thread area of the safety pressure plate;
the safety pressing plate is connected with the upper mounting sleeve in a screwed mode through threads.
3. The spark plug boot assembly of claim 1,
the outer side wall of one end, close to the upper mounting sleeve, of the lower mounting sleeve is provided with an external thread, and the cylinder cover is provided with an internal thread corresponding to the external thread area of the lower mounting sleeve;
the lower mounting sleeve is screwed with the cylinder cover through threads;
and the outer side wall of the lower mounting sleeve is in contact with the cooling liquid in the cylinder cover water channel.
4. The spark plug boot assembly of claim 3,
the outer side wall of the lower mounting sleeve is located above the water channel, and at least two first sealing rings are circumferentially arranged above the water channel.
5. The spark plug boot assembly of claim 1,
the outer side wall of the first pipe orifice extends outwards to form a shoulder;
the valve chamber cover compresses the upper installation sleeve by compressing the shoulder, and fixes and limits the upper installation sleeve.
6. The spark plug boot assembly of claim 5,
the second orifice is inserted into the lower mounting sleeve.
7. The spark plug boot assembly of claim 1,
and a second sealing ring is arranged between the upper mounting sleeve and the lower mounting sleeve.
8. The spark plug boot assembly of claim 1,
a third seal ring is disposed between the shoulder and the valve chamber cover.
9. A spark plug assembly comprising:
a spark plug sleeve assembly and a spark plug disposed within said spark plug sleeve assembly,
the spark plug sleeve assembly is as claimed in any one of claims 1 to 8;
wherein the spark plug is disposed within the lower mounting sleeve with an end portion extending beyond the lower mounting sleeve;
the outer side wall of the extending part of the spark plug is provided with external threads, the cylinder cover is provided with internal threads corresponding to the external thread area of the spark plug, and the spark plug is connected with the cylinder cover in a screwed mode through the threads.
10. An engine, comprising:
a spark plug assembly, a valve chamber cover and a cylinder head, characterized in that,
the spark plug assembly of claim 9, wherein the engine is a gas engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210146793.2A CN114629009B (en) | 2022-02-17 | 2022-02-17 | Spark plug sleeve assembly, spark plug assembly and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210146793.2A CN114629009B (en) | 2022-02-17 | 2022-02-17 | Spark plug sleeve assembly, spark plug assembly and engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114629009A true CN114629009A (en) | 2022-06-14 |
| CN114629009B CN114629009B (en) | 2023-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210146793.2A Active CN114629009B (en) | 2022-02-17 | 2022-02-17 | Spark plug sleeve assembly, spark plug assembly and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114629009B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202142771U (en) * | 2011-05-11 | 2012-02-08 | 东莞市康达机电工程有限公司 | Water-cooling type ignition plug sleeve and mounting and fixing structure thereof |
| CN104092100A (en) * | 2014-06-20 | 2014-10-08 | 李星 | Sealing structure of sparking plug steel bushing |
| CN110985263A (en) * | 2019-11-13 | 2020-04-10 | 英莎菲司特(深圳)清洁动力科技有限公司 | Spark plug sleeve assembly of gas engine |
| CN211500821U (en) * | 2019-12-10 | 2020-09-15 | 东风汽车集团有限公司 | Sealing system of gasoline engine spark plug protective tube |
-
2022
- 2022-02-17 CN CN202210146793.2A patent/CN114629009B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202142771U (en) * | 2011-05-11 | 2012-02-08 | 东莞市康达机电工程有限公司 | Water-cooling type ignition plug sleeve and mounting and fixing structure thereof |
| CN104092100A (en) * | 2014-06-20 | 2014-10-08 | 李星 | Sealing structure of sparking plug steel bushing |
| CN110985263A (en) * | 2019-11-13 | 2020-04-10 | 英莎菲司特(深圳)清洁动力科技有限公司 | Spark plug sleeve assembly of gas engine |
| CN211500821U (en) * | 2019-12-10 | 2020-09-15 | 东风汽车集团有限公司 | Sealing system of gasoline engine spark plug protective tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114629009B (en) | 2023-07-21 |
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