CN115898726A - Air-entrainment injection supply system for hydrogen fuel internal combustion engine - Google Patents
Air-entrainment injection supply system for hydrogen fuel internal combustion engine Download PDFInfo
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- CN115898726A CN115898726A CN202211493092.2A CN202211493092A CN115898726A CN 115898726 A CN115898726 A CN 115898726A CN 202211493092 A CN202211493092 A CN 202211493092A CN 115898726 A CN115898726 A CN 115898726A
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- 239000000446 fuel Substances 0.000 title claims abstract description 106
- 239000001257 hydrogen Substances 0.000 title claims abstract description 80
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 80
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 70
- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 56
- 238000002156 mixing Methods 0.000 claims abstract description 42
- 238000010892 electric spark Methods 0.000 claims description 2
- 239000000295 fuel oil Substances 0.000 abstract description 16
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 21
- 238000000889 atomisation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000002000 scavenging effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses an air-entraining injection supply system for a hydrogen fuel internal combustion engine, which comprises a cylinder, a cylinder cover, a piston and an air-entraining injector, wherein the cylinder and the cylinder cover form a combustion chamber of the engine, the air-entraining injector comprises a fuel injector, a hydrogen injector and a mixing nozzle, and fuel oil sprayed by the fuel injector is mixed with hydrogen sprayed by the hydrogen injector to form mixed gas of hydrogen and fuel oil, and then the mixed gas is sprayed out through the mixing nozzle and enters the combustion chamber. The invention can provide combustible mixed gas with smaller droplet particle size and more uniform mixing of fuel and air, can realize more thorough in-cylinder combustion process, and reduces the content of pollutants in exhaust gas; in addition, because the fuel oil is injected by the air entrainment injector and is subjected to grain size refinement for multiple times, and high-pressure hydrogen is directly injected into the combustion chamber, the injection pressure of the fuel oil is lower, so that the types of the fuel oil can be selected in multiple ways.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to an air-entrainment injection supply system for a hydrogen fuel internal combustion engine.
Background
In order to realize carbon peak reaching and carbon neutralization as early as possible and reduce carbon emission, the application of the current hydrogen fuel and hydrogen energy is more and more emphasized, the hydrogen combustion only generates water, and the emission is pollution-free and environment-friendly.
However, the traditional internal combustion engine adopts fossil fuel, so that the emission pollutants are more, and CO exists 2 、HC、NO X Such as compounds and particles, and has the problems that the atomization is difficult and the like because the injection pressure of part of the types of fuel is high. The air-entraining injection mode is mainly used for improving the atomization characteristic of fuel oil, reducing the charge loss in the scavenging process of the engine, improving the fuel oil economy and reducing the emission.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a gas entrainment injection supply system for a hydrogen fuel internal combustion engine, which can provide combustible mixed gas with smaller droplet particle size and more uniform mixing of fuel and air, can realize more thorough in-cylinder combustion process, reduce the content of pollutants in exhaust gas and enable the type of fuel oil to be selected in various ways.
In order to achieve the purpose, the invention provides the following technical scheme:
a compressed air injection supply system for a hydrogen fueled internal combustion engine comprising a cylinder, a cylinder head, a piston and a compressed air injector, said cylinder and cylinder head forming a combustion chamber of the engine, said piston reciprocating in said combustion chamber, characterized in that: the gas-entraining injector comprises a fuel injector, a hydrogen injector and a mixing nozzle, wherein fuel sprayed by the fuel injector is mixed with hydrogen sprayed by the hydrogen injector to form mixed gas of hydrogen and fuel, and then the mixed gas is sprayed out through the mixing nozzle and enters the combustion chamber.
Furthermore, an air inlet channel is arranged on one side of the cylinder or the cylinder cover.
Further, the air entrainment injector is mounted on the cylinder head or the air intake passage.
Furthermore, the axial included angle between the mixing nozzle and the air inlet channel is 5-10 degrees.
Furthermore, a spark plug is arranged on the cylinder cover and can generate electric sparks to ignite the mixed gas in the combustion chamber and push the piston to move downwards to do work outwards.
Furthermore, the axial included angle between the mixing nozzle and the spark plug is 25-35 degrees.
Further, the fuel injector and the hydrogen injector are respectively and correspondingly connected with a fuel pipeline and a hydrogen pipeline, and a fuel electromagnetic valve and a hydrogen electromagnetic valve are respectively and correspondingly installed in the fuel pipeline and the hydrogen pipeline.
Compared with the prior art, the invention has the beneficial effects that:
the invention can provide combustible mixed gas with smaller droplet particle size and more uniform mixing of fuel and air, can realize more thorough in-cylinder combustion process, and reduces the content of pollutants in exhaust gas; in addition, the fuel oil is injected by the gas-entraining injector and subjected to grain size refinement for multiple times, and high-pressure hydrogen is directly injected into the combustion chamber, so that the injection pressure of the fuel oil is low, the types of the fuel oil can be selected in multiple ways, heavy oil and the like which are rarely applied in a conventional engine can be used as the fuel, and a good effect can be obtained.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention.
Detailed Description
The technical solutions 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.
Example one
Referring to fig. 1, one side of a cylinder cover 1 is provided with an air inlet channel 4, an air inlet valve 2 is installed on the cylinder cover 1, and the communication and isolation between working media in the air inlet channel 4 and an engine combustion chamber are controlled through the opening and closing of the air inlet valve 2.
The air entrainment injector 3 is mounted on the cylinder head 1 and comprises a fuel injector 31 controlled by an oil solenoid valve, a hydrogen injector 32 controlled by a hydrogen solenoid valve and a mixing nozzle 33, wherein a mixing air storage chamber is arranged below the fuel injector 31, and the mixed air of the hydrogen and the fuel in the mixing air storage chamber is injected into the combustion chamber through the mixing nozzle 33. The axial included angle between the mixing nozzle 33 and the air inlet channel 4 is 5-10 degrees, so that the mixed air jetted out by the mixing nozzle 33 can generate vortex in a combustion chamber, the combustion is more sufficient, and the emission is lower.
During the working process of the engine, when air enters, the piston moves downwards, the air inlet valve 2 is opened, and air enters the combustion chamber through the opened air inlet valve 2 and forms an air inlet vortex in the combustion chamber. When the air intake is finished, the piston is compressed to a certain crank angle before the top dead center, a certain amount of fuel is injected into the mixed gas storage chamber by the fuel injector 31 through the metering of the fuel electromagnetic valve, wherein a part of the fuel is evaporated to form a mixed gas of air and the fuel, the other part of the fuel forms fuel droplets to be suspended in the mixed gas storage chamber, when the hydrogen is injected, the hydrogen injector 32 injects high-pressure hydrogen into the mixed gas storage chamber under the control of the hydrogen electromagnetic valve, the fuel droplets suspended in the gas storage chamber are further crushed, the mixed gas of the hydrogen and the fuel is injected into the combustion chamber through the mixing nozzle 33 and is mixed with an air vortex formed by compression in the combustion chamber, so that the mixed gas of the hydrogen and the fuel is rapidly mixed with the air flowing at a high speed in the combustion chamber to form a good combustible mixed gas, the combustible mixed gas is ignited by the spark plug 5, and the combustion process is started in the cylinder to push the piston to do work outwards.
In the fuel supply process, the fuel is sprayed into the first atomization process through the fuel injector 31, namely the process of droplet refinement, the process of primary particle size refinement is carried out on the fuel droplets suspended in the mixed gas storage chamber through the spraying of high-pressure hydrogen, the primary refinement process is also carried out when the mixed gas of the fuel and the hydrogen is sprayed into the combustion chamber through the mixed nozzle 33, and the mixed gas sprayed from the mixed nozzle 33 has the effect of further droplet refinement in the process of mixing with the air compressed and flowing at high speed in the combustion chamber. Therefore, the supply system of the embodiment can provide combustible mixed gas with smaller droplet size and more uniform mixing of fuel and air, realize more thorough in-cylinder combustion process and reduce the content of pollutants in exhaust gas. In addition, the fuel oil is injected by the gas-entraining injector 3, the grain diameter is refined for a plurality of times, and the high-pressure hydrogen is directly injected into the combustion chamber, so the injection pressure of the fuel oil is lower, the type of the fuel oil can be selected in a plurality of ways, the heavy oil and the like which are less applied in the conventional engine can be used as the fuel, and the good effect can be obtained.
Example two
Referring to fig. 2, a piston 6 is installed in a cylinder 7, a cylinder head 1 is installed on the top of the cylinder 7, an intake passage 4 is provided at one side of the cylinder 7, the cylinder head 1 and the cylinder 7 constitute a combustion chamber, and the piston 6 reciprocates in the combustion chamber.
The spark plug 5 is installed on the cylinder head 1, the air-entraining injector 3 is installed on the cylinder head 1, including the fuel injector 31 controlled by the fuel electromagnetic valve, the hydrogen injector 32 controlled by the hydrogen electromagnetic valve and the mixing nozzle 33, the lower of the fuel injector 31 is the mixing air receiver, the mixed gas of hydrogen and fuel in the mixing air receiver is injected into the combustion chamber through the mixing nozzle 33, the axial included angle between the mixing nozzle 33 and the spark plug 5 is 25-35 degrees, so as to form the good combustible environment rapidly near the spark plug 5, and at the same time, form the homogeneous lean combustion condition in the combustion chamber, thus reduce the fuel consumption, and improve the discharge performance at the same time.
In the working process of the engine, the piston 6 moves downwards, when the top surface of the piston 6 is lower than the air inlet channel 4, air enters the combustion chamber through the air inlet channel 4 to be scavenged, namely, the air inlet process is started. When the piston 6 moves upwards and the air inlet 4 and the air outlet are closed, the compression process is started, before the piston 6 is compressed to the top dead center, a certain amount of fuel is injected into the mixed air storage chamber by the fuel injector 31 through the metering of the fuel electromagnetic valve, a part of the fuel is evaporated to form a mixed gas of air and the fuel, the other part of the fuel forms fuel droplets to be suspended in the mixed air storage chamber, when the hydrogen is injected, the hydrogen injector 32 injects high-pressure hydrogen into the mixed air storage chamber under the control of the hydrogen electromagnetic valve, the fuel droplets suspended in the air storage chamber are further crushed, the mixed gas of the hydrogen and the fuel is injected through the mixing nozzle 33 to enter the combustion chamber and is mixed with an air vortex formed by compression in the combustion chamber, the mixed gas of the hydrogen and the fuel is rapidly mixed with the air flowing at high speed in the combustion chamber to form a good combustible mixed gas, the combustible mixed gas is ignited by the spark plug 5, the combustion process is started in the cylinder, and the piston 6 is pushed to move downwards to do work outwards.
EXAMPLE III
Referring to fig. 3, one side of the cylinder cover 1 is provided with an air inlet channel 4, an air inlet valve 2 is arranged on the cylinder cover 1, and the communication and isolation between working media in the air inlet channel 4 and an engine combustion chamber are controlled through the opening and closing of the air inlet valve 2.
The air entrainment injector 3 is installed on the air inlet 4 and comprises a fuel injector 31 controlled by an oil solenoid valve, a hydrogen injector 32 controlled by a hydrogen solenoid valve and a mixing nozzle 33, wherein a mixing air storage chamber is arranged below the fuel injector 31, and the mixed air of the hydrogen and the fuel in the mixing air storage chamber is injected into the air inlet 4 through the mixing nozzle 33.
In the air intake process of the engine, before the air intake valve 2 is opened, a certain amount of fuel is injected into the mixed gas storage chamber by the fuel injector 31 through the metering of a fuel electromagnetic valve, wherein a part of the fuel is evaporated to form a mixed gas of air and the fuel, the other part of the fuel forms fuel droplets to be suspended in the mixed gas storage chamber, when the hydrogen is injected, the hydrogen injector 32 injects high-pressure hydrogen into the mixed gas storage chamber under the control of the hydrogen electromagnetic valve, the fuel droplets suspended in the gas storage chamber are further crushed, the mixed gas is sprayed out through the mixing nozzle 33 to enter the air inlet channel 4, the air intake valve 2 is opened, the air enters the air inlet channel 4 after being filtered by elements such as an air filter and the like, when the air flows into the combustion chamber, the hydrogen sprayed out from the air entrainment injector 3 and the mixed gas of the fuel are brought into the combustion chamber together and mixed to form the mixed gas of the air, the hydrogen and the fuel, and the good combustible mixed gas is formed in the combustion chamber. The combustion takes place by igniting the combustible mixture by means of a spark plug 5 mounted on the cylinder head 1.
In the supply process, the fuel is sprayed into the first atomization process through the fuel injector 31, namely the process of thinning liquid drops, the process of thinning the particle size of the fuel liquid drops suspended in the mixed gas storage chamber is carried out by the high-pressure hydrogen spraying, and the thinning process is also carried out when the mixed gas of the fuel and the hydrogen is sprayed out through the mixing nozzle 33, and the effect of uniformly mixing and further thinning the liquid drops is also achieved when the mixed gas of the hydrogen and the fuel is brought into the combustion chamber by air. Therefore, the supply system of the embodiment can provide combustible mixed gas with smaller droplet particle size and more uniform mixing of fuel and air, realize more thorough in-cylinder combustion process and reduce the content of pollutants in exhaust. Meanwhile, the air entrainment injector 3 utilizes high-pressure hydrogen and fuel to form air entrainment injection, and the fuel is subjected to a plurality of liquid drop refining processes before entering the combustion chamber, so that the injection pressure of the fuel is lower, more energy is not required to be consumed for improving the injection pressure of the fuel to achieve a better atomization effect, the energy loss of the engine is reduced in the working process of the engine, and the efficiency of the engine is improved.
In this operation, fuel injection precedes hydrogen injection, which controls the time when the mixture of hydrogen and fuel enters the intake port 4 via the mixing nozzle 33, and therefore the timing requirement is high. By respectively adjusting the fuel injection amount and timing and the hydrogen injection amount and timing, the mixed gas with different concentrations can be provided according to the change of the operation condition of the engine, and the working requirements under various working conditions are met.
Example four
Referring to fig. 4, a piston 6 is installed in a cylinder 7, a cylinder head 1 is installed on the top of the cylinder 7, an intake passage 4 is provided at one side of the cylinder 7, the cylinder head 1 and the cylinder 7 constitute a combustion chamber, and the piston 6 reciprocates in the combustion chamber.
The spark plug 5 is arranged on the cylinder cover 1, the air-entraining injector 3 is arranged on the cylinder cover 1 and comprises a fuel injector 31 controlled by a fuel electromagnetic valve, a hydrogen injector 32 controlled by a hydrogen electromagnetic valve and a mixing nozzle 33, a mixing air storage chamber is arranged below the fuel injector 31, and the mixture of the hydrogen and the fuel in the mixing air storage chamber is injected into the air inlet channel 4 through the mixing nozzle 33.
During the working process of the engine, the piston 6 descends, before the air inlet 4 is opened, a certain amount of fuel is injected into the mixed air storage chamber by the fuel injector 31 through the metering of a fuel electromagnetic valve, a part of the fuel is evaporated to form a mixed gas of air and the fuel, the other part of the fuel forms fuel droplets to be suspended in the mixed air storage chamber, when the hydrogen is injected, the hydrogen injector 32 injects high-pressure hydrogen into the mixed air storage chamber under the control of the hydrogen electromagnetic valve, the fuel droplets suspended in the air storage chamber are further crushed, the mixed gas of the hydrogen and the fuel is sprayed out through the mixing nozzle 33 to enter the air inlet 4, the piston descends, the air inlet 4 is opened, when the scavenging process starts, when the air flows into the combustion chamber through the air inlet 4, the hydrogen sprayed out of the air entrainment injector 3 and the mixed gas of the fuel are brought into the combustion chamber together, and the mixed gas of the air, the hydrogen and the fuel is mixed to form a good combustible mixed gas in the combustion chamber, and the combustion requirements of the engine under different working conditions are met.
In order to improve the scavenging effect of the engine and avoid the waste of fuel and the pollution of emission in the two-stroke engine, the injection time of the hydrogen injector 32 can be controlled after the air inlet 4 is opened, so that the scavenging of the combustion chamber can be completed by pure air. The two-stroke engine adopting the valve can also control the injection of the air-entraining injector 3 after the valve is opened, and the scavenging process is completed by utilizing pure air.
Although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity, and it is understood that the specification is incorporated herein by reference, and the embodiments described in each embodiment may be combined as appropriate to form other embodiments, which will be apparent to those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (7)
1. A gas entrainment injection delivery system for a hydrogen fueled internal combustion engine comprising a cylinder, a cylinder head, a piston and a gas entrainment injector, said cylinder and cylinder head defining a combustion chamber of the engine, said piston reciprocating in said combustion chamber, characterized in that: the gas-entraining injector comprises a fuel injector, a hydrogen injector and a mixing nozzle, wherein fuel sprayed by the fuel injector is mixed with hydrogen sprayed by the hydrogen injector to form mixed gas of hydrogen and fuel, and then the mixed gas is sprayed out through the mixing nozzle and enters the combustion chamber.
2. The air entrainment injection supply system for a hydrogen-fueled internal combustion engine according to claim 1, characterized in that: and an air inlet channel is arranged on one side of the cylinder or the cylinder cover.
3. The air entrainment injection supply system for a hydrogen-fueled internal combustion engine according to claim 2, characterized in that: the air entrainment injector is arranged on the cylinder cover or the air inlet channel.
4. The air entrainment injection supply system for a hydrogen-fueled internal combustion engine according to claim 2, characterized in that: the axial included angle between the mixing nozzle and the air inlet channel is 5-10 degrees.
5. The air entrainment injection supply system for a hydrogen-fueled internal combustion engine according to claim 1, characterized in that: the cylinder cover is provided with a spark plug which can generate electric spark to ignite the mixed gas in the combustion chamber and push the piston to move downwards to do work outwards.
6. The air entrainment injection supply system for a hydrogen-fueled internal combustion engine according to claim 5, characterized in that: the axial included angle between the mixing nozzle and the spark plug is 25-35 degrees.
7. The air-entrainment injection supply system for a hydrogen-fueled internal combustion engine according to claim 1, characterized in that: the fuel injector and the hydrogen injector are respectively and correspondingly connected with a fuel pipeline and a hydrogen pipeline, and a fuel electromagnetic valve and a hydrogen electromagnetic valve are respectively and correspondingly installed in the fuel pipeline and the hydrogen pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211493092.2A CN115898726A (en) | 2022-11-25 | 2022-11-25 | Air-entrainment injection supply system for hydrogen fuel internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211493092.2A CN115898726A (en) | 2022-11-25 | 2022-11-25 | Air-entrainment injection supply system for hydrogen fuel internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN115898726A true CN115898726A (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211493092.2A Pending CN115898726A (en) | 2022-11-25 | 2022-11-25 | Air-entrainment injection supply system for hydrogen fuel internal combustion engine |
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| Country | Link |
|---|---|
| CN (1) | CN115898726A (en) |
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2022
- 2022-11-25 CN CN202211493092.2A patent/CN115898726A/en active Pending
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