CN115523070A - Hydrogen jet ignition device - Google Patents
Hydrogen jet ignition device Download PDFInfo
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- CN115523070A CN115523070A CN202210494103.2A CN202210494103A CN115523070A CN 115523070 A CN115523070 A CN 115523070A CN 202210494103 A CN202210494103 A CN 202210494103A CN 115523070 A CN115523070 A CN 115523070A
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- jet
- hydrogen
- spark plug
- ignition device
- hole
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 71
- 239000001257 hydrogen Substances 0.000 title claims abstract description 71
- 238000002485 combustion reaction Methods 0.000 claims abstract description 46
- 239000007789 gas Substances 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims abstract description 3
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
- F02P15/006—Ignition installations combined with other systems, e.g. fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
- F02B19/1019—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber
- F02B19/108—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
-
- 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
- F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
-
- 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
- F02P9/00—Electric spark ignition control, not otherwise provided for
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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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The continuous ignition effect and the combustion stability of the jet ignition technology in the lean combustion mode of the engine are very important. The invention provides a hydrogen jet ignition device, which mainly comprises a hydrogen injector, a spark plug and a fixing piece, wherein the fixing piece comprises a precombustion chamber and a jet hole, the rear part of the fixing piece is used for mounting the hydrogen injector and the spark plug, and the front part of the fixing piece is connected and mounted in the hole of the original spark plug through threads; the hydrogen injector and the spark plug are arranged in the fixing piece in parallel, the precombustion chamber is designed into a funnel shape, and the jet hole is positioned at the foremost end of the fixing piece and is communicated with the main combustion chamber of the engine. The hydrogen injector sprays hydrogen into the precombustion chamber, and the sparking plug can ignite the hydrogen in the precombustion chamber to form stable flame, and then the stable flame is sprayed out through the jet holes to quickly ignite mixed gas in the main combustion chamber, so that a continuous and reliable ignition source is formed. The jet ignition device is based on the structural design of the existing jet ignition device, and has the functions of forming a continuous ignition effect, enhancing the ignition stability and strengthening the ignition characteristic.
Description
Technical Field
The invention belongs to the field of engines, and particularly relates to a hydrogen jet ignition device.
Background
The release of national "carbon peaking, carbon neutralization" strategic objectives and the enforcement of increasingly stringent environmental regulations place ever higher demands on the performance enhancement of internal combustion engines. The lean combustion technology is an effective way for improving combustion performance, reducing carbon emission and assisting double carbon targets. However, in the engine under the lean-burn condition, the problem of unstable ignition and combustion needs to be concerned, and the ignition energy is often required to be increased due to the deteriorated ignitability of the mixture. Therefore, the jet ignition technology is a mainstream, efficient and reliable high-energy ignition mode at present. However, the ignition and combustion process of jet flame is extremely complex, the ignition characteristics and the combustion influence factors are more, and the application of the current jet ignition device is still not wide enough and popular. In addition, some jet ignition devices also suffer from misfire due to limitations in the use of fuel and the size of the jet aperture. Hydrogen as a zero-carbon type gas fuel has the advantages of high combustion rate, wide combustible limit, low ignition energy, easy diffusion, no carbon and the like, and the characteristics make the hydrogen very suitable as a basic fuel of a jet ignition device. Particularly, when the engine runs under the lean combustion condition and the jet hole diameter is small, the outstanding combustion characteristic advantages are obvious. Therefore, in order to further improve the ignition and combustion stability of the jet ignition device, the invention designs the hydrogen jet ignition device for the automobile engine.
Disclosure of Invention
In order to solve the problems, the invention provides a hydrogen jet ignition device which is simple in structure and stable in ignition.
The technical scheme adopted by the invention is as follows: a hydrogen jet ignition device is characterized in that: including a hydrogen injector, a spark plug, and a mount. The hydrogen jet ignition device is designed according to the structure of a spark plug of an engine and can be assembled and disassembled in a portable mode; the fixing piece comprises a precombustion chamber and a jet hole, the rear part of the fixing piece is used for mounting a hydrogen injector and a spark plug, and the front part of the fixing piece is mounted in the hole of the original spark plug through a threaded link; the hydrogen injector and the spark plug are arranged in the fixing piece in parallel, the heads of the hydrogen injector and the spark plug are inserted into the pre-combustion chamber, and the hydrogen injector is connected with a fuel injection system of an engine and a spark plug connection point thermal power electronic control system, so that accurate control can be realized; the precombustion chamber is designed into a funnel shape, and can play a role in accelerating flame in the later combustion process; the jet hole is positioned at the foremost end of the fixing piece, is communicated with a main combustion chamber of the engine and can inject combustion free radicals into the main combustion chamber; the hydrogen injector is used for injecting hydrogen into the pre-combustion chamber; the spark plug can ignite the hydrogen in the precombustion chamber to form stable flame, and the stable flame is ejected out through the jet hole to quickly ignite the mixed gas in the main combustion chamber to form a continuous and reliable ignition source.
In the above-described hydrogen jet ignition device: the hydrogen injector can realize multi-time and multi-stage injection control, and the outer diameter of the hydrogen injector is 6.0mm.
In the above-described hydrogen jet ignition device: the spark plug can realize multiple-time and multi-strategy ignition regulation and control, and the outer diameter of the spark plug is 10.0mm.
In the above hydrogen jet ignition device: the fixing piece can fix the hydrogen injector and the spark plug and can be designed into detachable parts with different jet hole numbers and jet angles, so that the requirements of multiple working conditions are met.
In the above hydrogen jet ignition device: the precombustion chamber is used for forming stable combustion flame, the height of the precombustion chamber is 15.0mm, and the total volume of the precombustion chamber is 3.3cm 3 。
In the above-described hydrogen jet ignition device: the jet hole sprays jet flame in the precombustion chamber into the main combustion chamber, and the diameter of the jet hole is 1.0mm.
The invention has the beneficial effects that:
1. the hydrogen jet ignition device is designed according to the structure and the size of the spark plug, has the advantages of compact structure, portability, disassembly and assembly and low cost, can be connected with a fuel injection system and an ignition electrical control system of an original machine, and realizes flexible control.
2. The hydrogen jet ignition device provided by the invention has the advantages that the ignition stability in the jet ignition process is enhanced by fully utilizing the combustion characteristics of low hydrogen ignition energy, wide combustible limit, strong lean burn capability, high flame propagation speed and the like, and stable jet flame is formed, so that the effect of continuous ignition is achieved.
3. The funnel-type precombustion chamber designed by the hydrogen jet ignition device can play a role in accelerating the propagation speed of jet flame in the precombustion chamber, meanwhile, the hydrogen injector can realize multi-stage injection for many times, the spark plug can realize multi-strategy ignition for many times, and different apertures, numbers and jet angles can be designed according to the jet holes of the engine type, so that multi-point and multi-region simultaneous ignition in the main combustion chamber can be realized, and the high requirement of timely and stable ignition of an ignition system under different engines and operating conditions can be further met.
4. The hydrogen jet ignition device can enhance the ignition stability and the combustion characteristic of the jet device by utilizing the advantages of excellent ignition and combustion characteristics and no carbon emission of hydrogen, thereby promoting the complete combustion of mixed gas in a main combustion chamber and reducing the carbon emission.
Drawings
Fig. 1 is an assembly view of the present invention.
Fig. 2 is a schematic view of the jet hole arrangement of the present invention.
In the figure: 1. a hydrogen gas injector; 2. a spark plug; 3. a fixing member; 4. a precombustion chamber; 5. and (4) a jet hole.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, without limiting the scope of the invention thereto.
As shown in the figure I, the hydrogen jet ignition device comprises a hydrogen injector, a spark plug and a fixing piece. The hydrogen jet ignition device is designed according to the structure of a spark plug of an engine, and can be assembled and disassembled conveniently; the fixing piece comprises a precombustion chamber and a jet hole, the back part of the fixing piece is used for mounting a hydrogen injector and a spark plug, and the front part of the fixing piece is communicated with a holeThe cross thread is connected and installed in the hole of the original spark plug; the hydrogen injector and the spark plug are arranged in the fixed piece in parallel, the heads of the hydrogen injector and the spark plug are inserted into the precombustion chamber, and the hydrogen injector is connected with a fuel injection system of an engine and a spark plug connection point thermal power electronic control system, so that accurate control can be realized; the pre-combustion chamber is designed into a funnel shape, and can play a role in accelerating flame in the later combustion process; the jet hole is positioned at the foremost end of the fixing piece, is communicated with a main combustion chamber of the engine, and can inject combustion free radicals into the main combustion chamber. The hydrogen injector can realize multi-time and multi-stage injection control, and the outer diameter of the hydrogen injector is 6.0mm; the spark plug can realize multiple-time and multi-strategy ignition regulation and control, and the outer diameter of the spark plug is 10.0mm; the precombustion chamber is used for forming stable combustion flame, the height of the precombustion chamber is 15.0mm, and the total volume of the precombustion chamber is 3.3cm 3 (ii) a The diameter of the jet hole is 1.0mm; the volume of the precombustion chamber subjected to structural optimization is 3.3cm 3 The hot jet ejected from the precombustion chamber can be ensured to have higher ignition energy, and turbulent mixing in the main combustion chamber can be promoted.
When the device is operated, a proper amount of hydrogen is injected into the precombustion chamber from the hydrogen injector at a certain injection pressure, the hydrogen and air are rapidly mixed in the precombustion chamber, when the mixed gas with moderate concentration flows and spreads to the vicinity of the spark plug, the spark plug generates electric sparks to ignite the combustible mixed gas flow, a high-strength turbulent jet flow rich in free radicals is formed, and the hot jet flow serves as a dispersed ignition source to be sprayed out of the jet holes during the high-speed flow of jet flame, so that the fuel in the main combustion chamber is rapidly ignited.
Fig. 2 shows a scheme of different hole numbers and jet angles (angles with the vertical center line) of the jet holes. In the three-hole scheme, three jet holes are uniformly distributed at a concentric circle 2.5mm away from the circle center, and the jet angle can be 0-45 degrees; the four-hole scheme is characterized in that a jet hole is additionally arranged at the circle center on the basis of the three-hole scheme, and the jet angle is 0 degree; the five-hole scheme is characterized in that four jet holes are uniformly arranged on a concentric circle 2.5mm away from the circle center, the jet angle can be 0-45 degrees, one jet hole is positioned at the circle center, and the jet angle is 0 degree.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (9)
1. A hydrogen jet ignition device is characterized in that: the hydrogen jet ignition device is designed according to the structure of the spark plug of the engine and can be assembled and disassembled in a portable mode; the fixing piece comprises a precombustion chamber and a jet hole, the rear part of the fixing piece is used for mounting a hydrogen injector and a spark plug, and the front part of the fixing piece is mounted in an original spark plug hole in a threaded connection mode; the hydrogen injector and the spark plug are arranged in the fixing piece in parallel, the heads of the hydrogen injector and the spark plug are inserted into the precombustion chamber, the hydrogen injector is connected with a fuel injection system of an engine, and the spark plug is connected with an ignition electric control system, so that the parameters can be accurately controlled; the pre-combustion chamber is designed into a funnel shape, and can play a role in accelerating flame in the later combustion process; the jet hole is positioned at the foremost end of the fixing piece, is communicated with a main combustion chamber of the engine and can inject combustion free radicals into the main combustion chamber; the hydrogen injector is used for injecting hydrogen into the pre-combustion chamber; the spark plug can ignite the hydrogen in the precombustion chamber to form stable flame, and the stable flame is ejected through the jet hole to quickly ignite combustible mixed gas in the main combustion chamber to form a continuous and reliable ignition source.
2. A hydrogen jet ignition device as defined in claim 1, wherein: the hydrogen injector can realize multi-time and multi-stage injection control, and the outer diameter of the hydrogen injector is 6.0mm.
3. A hydrogen jet ignition device as defined in claim 1, wherein: the spark plug can realize multiple ignition regulation and control at multiple times and multiple moments, and the outer diameter of the spark plug is 10.0mm.
4. A hydrogen jet ignition device as defined in claim 1, wherein: the fixing piece can fix the hydrogen injector and the spark plug, can be designed into detachable parts with different jet hole numbers and jet angles, and meets the requirements of different types of engines and different operation conditions.
5. A hydrogen jet ignition device as defined in claim 1, wherein: the jet holes can be designed into a three-hole scheme, the three jet holes are uniformly distributed at a concentric circle 2.5mm away from the circle center, and the jet angle can be 0-45 degrees.
6. A hydrogen jet ignition device as defined in claim 1, wherein: the jet holes can be designed into a four-hole scheme, three jet holes are uniformly arranged at a concentric circle 2.5mm away from the circle center, the jet angle can be 0-45 degrees, one jet hole is positioned at the circle center, and the jet angle is 0 degree.
7. A hydrogen jet ignition device as defined in claim 1, wherein: the jet holes can be designed into a five-hole scheme, four jet holes are uniformly arranged at a concentric circle 2.5mm away from the circle center, the jet angle can be 0-45 degrees, one jet hole is positioned at the circle center, and the jet angle is 0 degree.
8. A hydrogen jet ignition device as defined in claim 1, wherein: the precombustion chamber is used for forming stable combustion flame, the height of the precombustion chamber is 15.0mm, and the total volume of the precombustion chamber is 3.3cm 3 。
9. A hydrogen jet ignition device as defined in claim 1, wherein: the jet hole sprays jet flame in the precombustion chamber into the main combustion chamber, and the diameter of the jet hole is 1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210494103.2A CN115523070A (en) | 2022-05-05 | 2022-05-05 | Hydrogen jet ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210494103.2A CN115523070A (en) | 2022-05-05 | 2022-05-05 | Hydrogen jet ignition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115523070A true CN115523070A (en) | 2022-12-27 |
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ID=84695351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210494103.2A Pending CN115523070A (en) | 2022-05-05 | 2022-05-05 | Hydrogen jet ignition device |
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| CN (1) | CN115523070A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000257431A (en) * | 1999-03-05 | 2000-09-19 | Tokyo Gas Co Ltd | Antechamber type gas engine |
| DE19919642A1 (en) * | 1999-04-30 | 2000-11-02 | Daimler Chrysler Ag | Device for igniting fuel in a cyclic Otto engine feeds fuel into a combustion chamber by means of an injection jet set in a cylinder head and assigned to a spark plug set at an angle. |
| US6213085B1 (en) * | 1999-02-02 | 2001-04-10 | Delphi Technologies, Inc. | Directed jet spark plug |
| CN110094257A (en) * | 2019-04-30 | 2019-08-06 | 天津大学 | The precombustion chamber jet flame ignition combustion system of piston type Heavy End Aviation Fuel engine |
| CN111485992A (en) * | 2020-06-09 | 2020-08-04 | 天津内燃机研究所（天津摩托车技术中心） | Engine rapid combustion device suitable for low-evaporation characteristic fuel |
| CN112796870A (en) * | 2020-12-31 | 2021-05-14 | 天津大学 | Dual-injection turbulent jet ignition prechamber arrangement for spark-ignition engines |
| CN217421343U (en) * | 2022-05-05 | 2022-09-13 | 湘潭大学 | Hydrogen jet ignition device |
-
2022
- 2022-05-05 CN CN202210494103.2A patent/CN115523070A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6213085B1 (en) * | 1999-02-02 | 2001-04-10 | Delphi Technologies, Inc. | Directed jet spark plug |
| JP2000257431A (en) * | 1999-03-05 | 2000-09-19 | Tokyo Gas Co Ltd | Antechamber type gas engine |
| DE19919642A1 (en) * | 1999-04-30 | 2000-11-02 | Daimler Chrysler Ag | Device for igniting fuel in a cyclic Otto engine feeds fuel into a combustion chamber by means of an injection jet set in a cylinder head and assigned to a spark plug set at an angle. |
| CN110094257A (en) * | 2019-04-30 | 2019-08-06 | 天津大学 | The precombustion chamber jet flame ignition combustion system of piston type Heavy End Aviation Fuel engine |
| CN111485992A (en) * | 2020-06-09 | 2020-08-04 | 天津内燃机研究所（天津摩托车技术中心） | Engine rapid combustion device suitable for low-evaporation characteristic fuel |
| CN112796870A (en) * | 2020-12-31 | 2021-05-14 | 天津大学 | Dual-injection turbulent jet ignition prechamber arrangement for spark-ignition engines |
| CN217421343U (en) * | 2022-05-05 | 2022-09-13 | 湘潭大学 | Hydrogen jet ignition device |
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