CN117345477A - Dual fuel injector and engine - Google Patents
Dual fuel injector and engine Download PDFInfo
- Publication number
- CN117345477A CN117345477A CN202311477536.8A CN202311477536A CN117345477A CN 117345477 A CN117345477 A CN 117345477A CN 202311477536 A CN202311477536 A CN 202311477536A CN 117345477 A CN117345477 A CN 117345477A
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- Prior art keywords
- fuel
- control
- needle valve
- pressure
- channel
- Prior art date
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- 239000000446 fuel Substances 0.000 title claims abstract description 215
- 230000009977 dual effect Effects 0.000 title claims description 46
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000002347 injection Methods 0.000 claims abstract description 58
- 239000007924 injection Substances 0.000 claims abstract description 58
- 239000007921 spray Substances 0.000 claims abstract description 46
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000001257 hydrogen Substances 0.000 claims abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 27
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
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- 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
-
- 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
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a dual-fuel injector and an engine, wherein the dual-fuel injector is used for injecting hydrogen and ammonia, and comprises an injector body, a first electromagnetic valve, a second electromagnetic valve and a nozzle assembly; the inside of the injection body is provided with a control oil cavity channel, a first control cavity channel, a second control cavity channel, a first fuel cavity channel and a second fuel cavity channel; the first electromagnetic valve is used for controlling the pressure of control oil in the first control cavity; the second electromagnetic valve is used for controlling the pressure of the control oil in the second control cavity; the nozzle assembly comprises a needle valve body, a first needle valve and a second needle valve; the first needle valve and the second needle valve are both positioned in the needle valve body; the needle valve body is provided with a first spray cavity channel, a first spray hole, a second spray cavity channel and a second spray hole; the first spray cavity channel is connected with the first spray hole through a first needle valve; the second spray cavity channel is connected with the second spray hole through a second needle valve. By adopting the technical scheme, zero carbon emission can be realized, and the structure and the pipeline arrangement are simplified.
Description
Technical Field
The invention relates to the technical field of automobile internal combustion engines, in particular to a dual-fuel injector and an engine.
Background
In recent years, environmental problems have become more prominent, and development of alternative fuel technologies has become more and more important. Ammonia is an ideal chemical energy storage medium, carbon atoms are not contained in ammonia molecules, no greenhouse gas emission is generated during combustion, and ammonia has higher energy density, can be liquefied at normal temperature and pressure of 9.9bar or normal pressure and temperature of-33.4 ℃, and is beneficial to reducing high cost and potential safety risk caused by using high-pressure resistant equipment. However, ammonia also has some significant problems such as low laminar flame speed, high ignition energy, large latent heat of vaporization, etc. Hydrogen is currently considered an excellent combustion promoter, which itself is likewise free of carbon. Hydrogen has a relatively high laminar flame speed and relatively low ignition energy, and hydrogen is suitable for use as a pilot fuel.
In the prior art, different fuels are injected into a combustion cavity of an engine through different injectors, and a cover of the engine needs to be greatly changed; or, some integrated dual fuel injectors have complex structures, difficult pipeline arrangement and larger body types, which are not beneficial to practical application.
Accordingly, there is a need for a dual fuel injector that addresses the above-described issues.
Disclosure of Invention
The invention provides a dual fuel injector and an engine to achieve zero carbon emissions and to simplify the structure and piping arrangement.
According to an aspect of the present invention, there is provided a dual fuel injector for injecting hydrogen and ammonia; the dual fuel injector includes:
the injection body is internally provided with a control oil cavity channel, a first control cavity channel, a second control cavity channel, a first fuel cavity channel and a second fuel cavity channel; the injection body further includes a control oil inlet, a first fuel inlet, and a second fuel inlet; the control oil inlet is connected with the control oil cavity channel; the first fuel inlet is connected with the first fuel cavity channel; the second fuel inlet is connected with the second fuel cavity channel; wherein, the first control cavity channel and the second control cavity channel are both connected with the control oil cavity channel;
the first electromagnetic valve is connected with one end of the first control cavity channel; the first electromagnetic valve is used for controlling the pressure of control oil in the first control cavity;
the second electromagnetic valve is connected with one end of the second control cavity channel; the second electromagnetic valve is used for controlling the pressure of control oil in the second control cavity;
the nozzle assembly comprises a needle valve body, a first needle valve and a second needle valve; the first needle valve and the second needle valve are both positioned in the needle valve body, the other end of the first control cavity channel is connected with the first needle valve, and the other end of the second control cavity channel is connected with the second needle valve; the needle valve body is provided with a first spray cavity channel, a first spray hole, a second spray cavity channel and a second spray hole; the first injection cavity channel is connected with the first fuel cavity channel, and the first injection cavity channel is connected with the first spray hole through the first needle valve; the second injection cavity passage is connected with the second fuel cavity passage, and the second injection cavity passage is connected with the second spray hole through the second needle valve.
Optionally, the pressure of the control oil in the control oil gallery is greater than the pressure of the first fuel in the first fuel gallery and the pressure of the second fuel in the second fuel gallery, respectively.
Optionally, the pressure of the first fuel in the first fuel cavity and the pressure of the second fuel in the second fuel cavity are both greater than or equal to 300bar.
Optionally, the difference between the pressure of the control oil in the control oil channel and the pressure of the first fuel in the first fuel channel is a first difference; the difference between the pressure of the control oil in the control oil channel and the pressure of the second fuel in the second fuel channel is a second difference;
the first difference and the second difference are each greater than or equal to 10bar.
Optionally, the diameters of the control oil channel, the first control channel and the second control channel are all greater than or equal to 0.8mm and less than or equal to 1.0mm.
Optionally, the diameters of the first fuel cavity channel, the second fuel cavity channel, the first spray cavity channel and the second spray cavity channel are all greater than or equal to 0.8mm and less than or equal to 1.0mm.
Optionally, the length of each of the first needle valve and the second needle valve is greater than or equal to 30mm and less than or equal to 50mm.
Optionally, the first needle valve and the second needle valve are nested, and the second needle valve is located in the first needle valve; the outer diameter of the needle valve body is larger than or equal to 9mm and smaller than or equal to 11mm.
Optionally, the method further comprises: sealing the screw plug; the sealing screw plug is screwed and fixed at one end of the first needle valve, which is close to the first control cavity;
the sealing screw plug is used for isolating and sealing the first control cavity channel and the second control cavity channel.
According to another aspect of the present invention, there is provided an engine including: a combustion cylinder, a cover, a spark plug positioned on the cover and the dual fuel injector;
the combustion cylinder comprises a combustion cavity and a piston;
the cover includes a first opening and a second opening to enable an electrode of the spark plug to extend into the combustion chamber through the first opening and to enable the first and second injection orifices of the dual fuel injector to extend into the combustion chamber through the second opening.
According to the technical scheme, the control oil can enter the control oil cavity channel, the first control cavity channel and the second control cavity channel, the first fuel can enter the first fuel cavity channel and the first spraying cavity channel, and the second fuel can enter the second fuel cavity channel and the second spraying cavity channel, so that the dual-fuel injector can jet hydrogen and ammonia, meanwhile, the control oil cannot be jetted, and zero carbon emission is realized; the first electromagnetic valve is used for controlling the pressure of the control oil in the first control cavity and the second electromagnetic valve is used for controlling the pressure of the control oil in the second control cavity, so that the states of the first needle valve and the second needle valve can be controlled respectively, the control process does not need to change the pressure or the volume of fuel, and the like, the volume of the fuel in the dual-fuel injector is reduced, the consumption and the emission of the fuel are reduced, and the use cost is reduced; in addition, when the dual-fuel injector is applied to an engine, the injection of hydrogen and ammonia can be realized by only inserting the dual-fuel injector, and an inlet for hydrogen and ammonia is not required to be additionally arranged on the engine cover, so that the modification of the engine can be reduced, and the pipeline arrangement is simplified.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual fuel injector according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an engine according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention. 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.
Fig. 1 is a schematic structural diagram of a dual fuel injector according to an embodiment of the present invention, where the dual fuel injector is used for injecting hydrogen and ammonia. Referring to fig. 1, a dual fuel injector 01 includes:
the injection body 10 is internally provided with a control oil cavity channel 11, a first control cavity channel 12, a second control cavity channel 13, a first fuel cavity channel 14 and a second fuel cavity channel 15; the injection body 10 further comprises a control oil inlet 16, a first fuel inlet 17 and a second fuel inlet 18; the control oil inlet 16 is connected to the control oil gallery 11. The first fuel inlet 17 is connected to the first fuel channel 14 and the second fuel inlet 18 is connected to the second fuel channel 15, wherein the first control channel 12 and the second control channel 13 are both connected to the control oil channel 11.
A first solenoid valve 20 connected to one end of the first control chamber 12; the first solenoid valve 20 is used to control the pressure of the control oil in the first control gallery 12.
A second electromagnetic valve 30 connected to one end of the second control chamber 13; the second solenoid valve 30 is used to control the pressure of the control oil in the second control passage 13.
A nozzle assembly 40 including a needle valve body 41, a first needle valve 42, a second needle valve 43; the first needle valve 42 and the second needle valve 43 are both positioned in the needle valve body 41, the other end of the first control cavity channel 12 is connected with the first needle valve 42, and the other end of the second control cavity channel 13 is connected with the second needle valve 43; the needle valve body 41 is provided with a first spray cavity 44, a first spray orifice 45, a second spray cavity 46 and a second spray orifice 47; the first injection gallery 44 is connected to the first fuel gallery 14, and the first injection gallery 44 is connected to the first nozzle hole 45 through the first needle valve 42; the second injection gallery 46 is connected to the second fuel gallery 15, and the second injection gallery 46 is connected to the second injection hole 47 through the second needle valve 43.
Wherein the control oil inlet 16 is used for filling control oil, and the control oil can enter the control oil cavity channel 11, the first control cavity channel 12 and the second control cavity channel 13 through the control oil inlet 16 to assist the dual fuel injector 01 to work. The control oil includes, but is not limited to, gasoline, diesel, etc., and it should be noted that the control oil is not emitted from the dual fuel injector 01 and does not participate in combustion.
The first fuel inlet 17 is used to charge a first fuel that may enter the first fuel gallery 14 and the first injection gallery 44 from the first fuel inlet 17, and that may also assist the dual fuel injector 01 in operation, and be injected through the first injection orifice 45 when the first needle 42 is open. The second fuel inlet 18 is used to charge a second fuel, which may enter the second fuel gallery 15 and the second injection gallery 46 from the second fuel inlet 18, and which may also assist the dual fuel injector 01 in operation and be injected through the second injection orifice 47 when the second needle 43 is open. Hydrogen gas can be used as first fuel, enters the injection body 10 through the first fuel inlet 17, is injected out of the nozzle assembly 40 through the first spray hole 45, and first ammonia gas can be used as second fuel, enters the injection body 10 through the second fuel inlet 18, and is injected out of the nozzle assembly 40 through the second spray hole 47; alternatively, hydrogen may be used as the second fuel and ammonia may be used as the first fuel, which is not described herein. In an alternative embodiment, the first fuel inlet 17 and the second fuel inlet 18 are symmetrically arranged to facilitate installation and placement.
The first solenoid valve 20 includes a first coil 21 and a first spool 22, and when the first coil 21 is energized, the first spool 22 lifts to depressurize the first control chamber 12. The second solenoid valve 30 includes a second coil 31 and a second spool 32, and when the second coil 31 is energized, the second spool 32 lifts to depressurize the second control chamber 13.
Illustratively, the first fuel is hydrogen and the second fuel is ammonia. The dual fuel injector 01 is connected to a fuel supply system that can provide high pressure hydrogen, high pressure ammonia, and high pressure control oil to the dual fuel injector 01. Generally, ammonia gas is converted into liquid state under high pressure, and for convenience of description, gaseous ammonia gas and liquid ammonia gas are generally referred to as ammonia gas in the embodiments of the present invention.
When the first coil 21 of the first electromagnetic valve 20 is electrified, the first valve plug 22 is lifted to release the pressure of the first control cavity 12, and when the pressure of the high-pressure control oil in the first control cavity 12 is reduced to be smaller than the pressure of the high-pressure hydrogen in the first spray cavity 44, the first needle valve 42 can be lifted under the action of the pressure of the high-pressure hydrogen in the first spray cavity 44, the first needle valve 42 does not block the annular cavity 48 communicated with the first spray cavity 44, and the high-pressure hydrogen can be sprayed out through the first spray hole 45. When the first coil 21 of the first electromagnetic valve 20 is powered off, the first valve plug 22 falls down to cut off the pressure release channel of the first control chamber channel 12, the pressure of the high-pressure control oil in the first control chamber channel 12 gradually rises, the first needle valve 42 can fall back under the pressure action of the high-pressure control oil in the first control chamber channel 12, the first needle valve 42 blocks the annular cavity 48 communicated with the first injection chamber channel 44, and the high-pressure hydrogen stops being injected.
When the second coil 31 of the second electromagnetic valve 30 is electrified, the second valve plug 32 is lifted to release the pressure of the second control cavity 13, and when the pressure of the high-pressure control oil in the second control cavity 13 is reduced to be smaller than the pressure of the high-pressure ammonia gas in the second spray cavity 46, the second needle valve 43 can be lifted under the action of the pressure of the high-pressure ammonia gas in the second spray cavity 46, the second needle valve 43 does not block the communication between the second spray cavity 46 and the second spray hole 47, and the high-pressure ammonia gas can be sprayed out through the second spray hole 47. When the second coil 31 of the second electromagnetic valve 30 is powered off, the second valve plug 32 falls to cut off the pressure release channel of the second control chamber 13, the pressure of the high-pressure control oil in the second control chamber 13 gradually rises, the second needle valve 43 can fall back under the pressure action of the high-pressure control oil in the second control chamber 13, the second needle valve 43 blocks the communication between the second spray chamber 46 and the second spray hole 47, and the high-pressure ammonia stops being sprayed.
Alternatively, the pressure of the control oil in the control oil gallery 11 is greater than the pressure of the first fuel in the first fuel gallery 14 and the pressure of the second fuel in the second fuel gallery 15, respectively.
Illustratively, the first fuel is hydrogen and the second fuel is ammonia. The pressure of the high-pressure control oil in the control oil gallery 11 is greater than the pressure of the high-pressure hydrogen in the first fuel gallery 14, and at the same time, the pressure of the high-pressure control oil in the control oil gallery 11 is also greater than the pressure of the high-pressure ammonia in the second fuel gallery 15, and when neither the first solenoid valve 20 nor the second solenoid valve is energized, the first needle valve 42 and the second needle valve 43 can be kept in a closed state by the pressure of the high-pressure control oil in the first control gallery 12 and the second control gallery 13, and at the same time, the dual fuel injector 01 does not operate. Thus, when the dual fuel injector 01 is not in operation, the first electromagnetic valve 20 and the second electromagnetic valve 30 do not need to be always electrified to maintain the dual fuel injector 01 to be in operation, which is beneficial to reducing energy consumption and saving energy.
Optionally, the pressure of the first fuel in the first fuel gallery 14 and the pressure of the second fuel in the second fuel gallery 15 are both greater than or equal to 300bar.
Specifically, the pressure of the first fuel in the first fuel gallery 14 is equal to the pressure of the first fuel in the first fuel injection gallery 44, and the pressure of the second fuel in the second fuel gallery 15 is equal to the pressure of the second fuel in the second fuel injection gallery 46. Thus, when the pressure of the control oil in the first control chamber 12 is reduced, the first needle valve 42 can be lifted under the action of the larger pressure of the first fuel in the first injection chamber 44, and the first needle valve 42 is opened, so that the first fuel can be injected from the first injection hole 45; when the pressure of the control oil in the second control passage 13 is reduced, the second needle valve 43 can be lifted up by the larger pressure of the second fuel in the second injection passage 46, and the second needle valve 43 is opened so that the second fuel can be injected from the second injection hole 47. In addition, when the high-pressure first fuel and the high-pressure second fuel are injected into the combustion cavity of the engine, the high-pressure first fuel and the high-pressure second fuel can be quickly mixed with air in the combustion cavity, and the combustion efficiency is improved.
Optionally, the difference between the pressure of the control oil in the control oil gallery 11 and the pressure of the first fuel in the first fuel gallery 14 is a first difference; the difference between the pressure of the control oil in the control oil gallery 11 and the pressure of the second fuel in the second fuel gallery 15 is a second difference; the first difference and the second difference are each greater than or equal to 10bar.
Specifically, when the first solenoid valve 20 is not energized, the pressure of the control oil in the control oil gallery 11 is equal to the pressure of the control oil in the first control gallery 12; when the second solenoid valve 30 is not energized, the pressure of the control oil in the control oil gallery 11 is equal to the pressure of the control oil in the second control gallery 13. Thus, when the first solenoid valve 20 is not conducting, the first needle valve 42 may be continuously located below under the pressure of the control oil in the first control gallery 12, blocking the annular chamber 48 communicating with the first injection gallery 44; when the second electromagnetic valve 30 is not conducted, the second needle valve 43 can be continuously located below under the pressure of the control oil in the second control chamber 13, so that the communication between the second injection chamber 46 and the second injection hole 47 is blocked, the first needle valve 42 and the second needle valve 43 are not easily affected by vibration to loosen, and the reliability of the dual-fuel injector 01 is improved.
According to the dual fuel injector provided by the embodiment of the invention, the control oil can enter the control oil cavity channel, the first control cavity channel and the second control cavity channel, the first fuel can enter the first fuel cavity channel and the first injection cavity channel, and the second fuel can enter the second fuel cavity channel and the second injection cavity channel are arranged, so that the dual fuel injector can inject hydrogen and ammonia, and meanwhile, the control oil cannot be injected, and zero carbon emission is realized; the first electromagnetic valve is used for controlling the pressure of the control oil in the first control cavity and the second electromagnetic valve is used for controlling the pressure of the control oil in the second control cavity, so that the states of the first needle valve and the second needle valve can be controlled respectively, the control process does not need to change the pressure or the volume of fuel, and the like, the volume of the fuel in the dual-fuel injector is reduced, the consumption and the emission of the fuel are reduced, and the use cost is reduced; in addition, when the dual-fuel injector is applied to an engine, the injection of hydrogen and ammonia can be realized by only inserting the dual-fuel injector, and an inlet for hydrogen and ammonia is not required to be additionally arranged on the engine cover, so that the modification of the engine can be reduced, and the pipeline arrangement is simplified.
In an alternative embodiment, the diameters of the control oil gallery channel 11, the first control gallery channel 12, and the second control gallery channel 13 are all greater than or equal to 0.8mm and less than or equal to 1.0mm. Thus, when the first electromagnetic valve 20 is depressurized or is stopped, the pressure of the control oil in the first control cavity 12 can be changed rapidly, and when the second electromagnetic valve 30 is depressurized or is stopped, the pressure of the control oil in the second control cavity 13 can be changed rapidly, so that the response speed is improved, and the performance of the dual-fuel injector 01 is improved.
In an alternative embodiment, the diameters of the first fuel cavity channel, the second fuel cavity channel, the first spray cavity channel and the second spray cavity channel are all larger than or equal to 0.8mm and smaller than or equal to 1.0mm, so that dead volumes of the first fuel and the second fuel can be reduced, namely, the first fuel volume and the second fuel volume remained in the dual fuel injector 01 when the first fuel and the second fuel are injected into the combustion cavity for combustion are reduced, and consumption and emission of the first fuel and the second fuel can be reduced, the use cost is reduced, and the applicability is improved.
In one embodiment, the extension length of the first fuel gallery 14 is less than the extension lengths of the first and second control galleries 12, 13, respectively; the extension length of the second fuel gallery 15 is smaller than the extension lengths of the first control gallery 12 and the second control gallery 13, respectively, which is advantageous to further reduce dead volumes of the first fuel and the second fuel and reduce consumption and discharge of the first fuel and the second fuel.
In an alternative embodiment, the control oil can be recycled. Specifically, the control oil does not participate in the combustion of the engine, so the control oil is not consumed, and the control oil discharged from the first control chamber 12 and the second control chamber 13 by pressure relief can be recycled to the fuel supply system, thereby reducing the use cost.
In an alternative embodiment, at least a portion of first solenoid valve 20 is located outside of spray body 10, and at least a portion of second solenoid valve 30 is located outside of spray body 10. Illustratively, the first solenoid valve 20 and the second solenoid valve 30 are disposed outside the injector body 10, which, on the one hand, can reduce the complexity of the injector body 10, facilitating the installation of the first solenoid valve 20 and the second solenoid valve 30, and the line connection of the first coil 21 and the second coil 21; on the other hand, the exposed areas of the first coil 21 and the second coil 21 can be increased, which is advantageous for heat dissipation.
In an alternative embodiment, the control oil gallery channel 11 is connected to the first control gallery 12 by a first orifice plate 23, the first orifice plate 23 including a first orifice and a second orifice (not shown), the first orifice connecting the control oil gallery channel 11 to the first control gallery 12, and the second orifice connecting the first control gallery 12 to the first low pressure chamber 24; the control oil gallery channel 11 is also connected to the second control gallery channel 13 by a second orifice plate 33, the second orifice plate 33 also including a first orifice and a second orifice (not shown), the first orifice connecting the control oil gallery channel 11 to the second control gallery channel 13, and the second orifice connecting the second control gallery channel 13 to the second low pressure chamber 34. Thus, the amount of control oil can be reduced, the use cost can be reduced, and meanwhile, the first oil injection hole plate 23 and the second oil injection hole plate 33 can be universal, and the processing cost can be reduced.
In an alternative embodiment, with continued reference to FIG. 1, dual fuel injector 01 further includes a threaded tightening cap 50 to connect and secure injection body 10 and needle valve body 41 of nozzle assembly 40, which may improve the high pressure resistance of dual fuel injector 01 such that injection body 10 and needle valve body 41 are not easily separated, improving the reliability of dual fuel injector 01.
In an alternative embodiment, with continued reference to FIG. 1, the first needle valve 42 and the second needle valve 43 are nested, and the second needle valve 43 is located within the first needle valve 42; the outer diameter of the needle valve body is greater than or equal to 0.8mm and less than or equal to 11mm.
Illustratively, the second needle valve 43 is movable within the first needle valve 42 in a first direction; the first needle valve 42 is movable in a first direction within the needle valve body 41, wherein the first direction is an extending direction of the first needle valve and the second needle valve.
Specifically, the first needle valve 42 can be used as a needle valve member for connecting the first injection cavity channel 44 and the first injection hole, and can be used as a needle valve body of the second needle valve 43, so that the structural characteristics are reasonably utilized, the space is effectively utilized, the size of the needle valve body 41 can be reduced, the outer diameter of the needle valve body 41 is reduced to about 10mm, and when the needle valve is applied to an engine, a cover of the engine does not need to be greatly changed, and the application cost can be reduced.
In an alternative embodiment, with continued reference to FIG. 1, the dual fuel injector 01 further includes a sealing plug 60, the sealing plug 60 being screwed onto and secured to an end of the first needle valve 42 adjacent the first control gallery 12. The sealing plug 60 serves to isolate and seal the first control channel 12 and the second control channel 13.
Specifically, the sealing plug 60 may always close and isolate the end of the first control passage 12 adjacent to the first needle valve 42, and always close and isolate the end of the second control passage 13 adjacent to the second needle valve 43. In this way, the control oil in the first control chamber channel 12 and the first fuel in the first injection chamber channel 44 can be isolated, and the control oil in the second control chamber channel 13 and the second fuel in the second injection chamber channel 46 can be isolated, so that the control oil, the first fuel and the second fuel are not interfered with each other, on one hand, the reliability of the dual fuel injector 01 can be improved, the leakage of the control oil can be avoided, the zero carbon emission can be realized, and on the other hand, the sealing requirements on the first needle valve 42 and the second needle valve 43 can be reduced, and the processing and the installation can be facilitated.
In an alternative embodiment, the length of each of the first needle valve 42 and the second needle valve 43 is greater than or equal to 30mm and less than or equal to 50mm.
Specifically, the opening and closing of the first needle valve 42 are controlled by the pressure of the control oil in the first control passage 12 and the pressure of the first fuel in the first injection passage 44, and the first needle valve 42 may be a short needle valve; the second needle 43 may be a short needle using the pressure of the control oil in the second control passage 13 and the pressure of the second fuel in the second injection passage 46 to control the opening and closing of the second needle 43. Thus, the processing cost can be reduced.
In an alternative embodiment, with continued reference to FIG. 1, dual fuel injector 01 also includes a first return spring 71 and a second return spring 72. A first return spring 71 is located between the first needle valve 42 and the first control chamber passage 12 and a second return spring is located 72 between the second needle valve 43 and the second control chamber passage 13. The first needle valve 42 and the second needle valve 43 are advantageously fixed, and the shock resistance of the dual fuel injector 01 is improved.
Based on the same inventive concept, the embodiment of the invention also provides an engine. Fig. 2 is a schematic view of an engine according to an embodiment of the present invention, and referring to fig. 2, an engine 02 includes a combustion cylinder 80, a cover 90, and a spark plug 03 located in the cover 90 and a dual fuel injector 01 according to any embodiment of the present invention. The combustion cylinder 80 includes a combustion chamber 81 and a piston 82. The cover 90 includes a first opening 91 and a second opening 92 to allow the electrode of the spark plug 03 to extend through the first opening 91 into the combustion chamber 81 and to allow the first and second injection orifices of the dual fuel injector 01 to extend through the second opening 92 into the combustion chamber 81. It will be appreciated that the cover 90 further includes an air inlet and an air outlet (not shown), and will not be described again.
Illustratively, the first fuel is hydrogen and the second fuel is ammonia. First, the first solenoid valve 20 is controlled to be turned on to reduce the pressure of the control oil in the first control chamber passage 12, so that the pressure of the high-pressure hydrogen gas in the first injection chamber passage 44 is greater than the pressure of the control oil in the first control chamber passage 12, the first needle valve 42 is opened, and the first injection hole 45 can inject the hydrogen gas into the combustion chamber 81. Then, the first solenoid valve 20 is controlled to be turned off so that the pressure of the high-pressure hydrogen gas in the first injection passage 44 is smaller than the pressure of the control oil in the first control passage 12, and the first injection holes 45 stop injecting the hydrogen gas into the combustion chamber 81. Then, the ignition plug 03 is driven to ignite the first hydrogen gas in the combustion chamber 81. Finally, the second electromagnetic valve 30 is controlled to be conducted so as to reduce the pressure of the control oil in the second control channel 13, so that the pressure of the high-pressure ammonia gas in the second spraying channel 46 is larger than the pressure of the control oil in the second control channel 13, the second spraying hole 47 can spray the ammonia gas to the combustion cavity 81, and the ammonia gas in the combustion cavity 81 can be ignited by the hydrogen gas which is combusted. The time of injecting the hydrogen into the combustion cavity by the dual-fuel injector 01 can be adjusted and controlled according to the actual working condition, namely, the amount of injecting the hydrogen into the combustion cavity is controlled, the ignition time of the spark plug 03 can be adjusted and controlled, and the time of injecting the ammonia into the combustion cavity by the dual-fuel injector 01 can be adjusted and controlled, namely, the amount of injecting the ammonia into the combustion cavity is controlled, so that the efficient operation of the engine is realized.
It can be understood that in the embodiment of the invention, according to actual requirements, ammonia gas can be injected into the combustion cavity first, then the spark plug is driven to ignite, and finally ammonia gas and hydrogen gas are injected into the combustion cavity; or, ammonia gas and hydrogen gas can be injected into the combustion cavity first, and finally the spark plug is driven to ignite, so that the details are not repeated.
According to the engine provided by the embodiment of the invention, the dual-fuel injector provided by any embodiment of the invention is arranged and inserted on the cover, so that zero carbon emission can be realized, the injection of hydrogen and ammonia can be realized only by the dual-fuel injector, and the additional arrangement of an inlet for injecting hydrogen and ammonia on the cover is not needed, so that the modification of the engine can be reduced, the pipeline arrangement is simplified, and the applicability is improved.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A dual fuel injector for injecting hydrogen and ammonia; the dual fuel injector includes:
the injection body is internally provided with a control oil cavity channel, a first control cavity channel, a second control cavity channel, a first fuel cavity channel and a second fuel cavity channel; the injection body further includes a control oil inlet, a first fuel inlet, and a second fuel inlet; the control oil inlet is connected with the control oil cavity channel; the first fuel inlet is connected with the first fuel cavity channel; the second fuel inlet is connected with the second fuel cavity channel; wherein, the first control cavity channel and the second control cavity channel are both connected with the control oil cavity channel;
the first electromagnetic valve is connected with one end of the first control cavity channel; the first electromagnetic valve is used for controlling the pressure of control oil in the first control cavity;
the second electromagnetic valve is connected with one end of the second control cavity channel; the second electromagnetic valve is used for controlling the pressure of control oil in the second control cavity;
the nozzle assembly comprises a needle valve body, a first needle valve and a second needle valve; the first needle valve and the second needle valve are both positioned in the needle valve body, the other end of the first control cavity channel is connected with the first needle valve, and the other end of the second control cavity channel is connected with the second needle valve; the needle valve body is provided with a first spray cavity channel, a first spray hole, a second spray cavity channel and a second spray hole; the first injection cavity channel is connected with the first fuel cavity channel, and the first injection cavity channel is connected with the first spray hole through the first needle valve; the second injection cavity passage is connected with the second fuel cavity passage, and the second injection cavity passage is connected with the second spray hole through the second needle valve.
2. The dual fuel injector of claim 1, wherein a pressure of control oil in the control oil gallery is greater than a pressure of a first fuel in the first fuel gallery and a pressure of a second fuel in the second fuel gallery, respectively.
3. The dual fuel injector of claim 2, wherein the pressure of the first fuel in the first fuel gallery and the pressure of the second fuel in the second fuel gallery are each greater than or equal to 300bar.
4. The dual fuel injector of claim 3, wherein a difference between a pressure of control oil in the control oil gallery and a pressure of the first fuel in the first fuel gallery is a first difference; the difference between the pressure of the control oil in the control oil channel and the pressure of the second fuel in the second fuel channel is a second difference;
the first difference and the second difference are each greater than or equal to 10bar.
5. The dual fuel injector of claim 1, wherein the diameters of the control oil gallery channel, the first control gallery channel, and the second control gallery channel are each greater than or equal to 0.8mm and less than or equal to 1.0mm.
6. The dual fuel injector of claim 1, wherein the diameters of the first fuel gallery, the second fuel gallery, the first spray gallery, and the second spray gallery are each greater than or equal to 0.8mm and less than or equal to 1.0mm.
7. The dual fuel injector of claim 1, wherein the length of the first needle valve and the second needle valve are each greater than or equal to 30mm and less than or equal to 50mm.
8. The dual fuel injector of claim 1, wherein the first needle valve and the second needle valve are nested and the second needle valve is located within the first needle valve; the outer diameter of the needle valve body is larger than or equal to 9mm and smaller than or equal to 11mm.
9. The dual fuel injector of claim 8, further comprising: sealing the screw plug; the sealing screw plug is screwed and fixed at one end of the first needle valve, which is close to the first control cavity;
the sealing screw plug is used for isolating and sealing the first control cavity channel and the second control cavity channel.
10. An engine, comprising: a combustion cylinder, a cover, a spark plug located in the cover and the dual fuel injector of any of claims 1-9;
the combustion cylinder comprises a combustion cavity and a piston;
the cover includes a first opening and a second opening to enable an electrode of the spark plug to extend into the combustion chamber through the first opening and to enable the first and second injection orifices of the dual fuel injector to extend into the combustion chamber through the second opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311477536.8A CN117345477A (en) | 2023-11-07 | 2023-11-07 | Dual fuel injector and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311477536.8A CN117345477A (en) | 2023-11-07 | 2023-11-07 | Dual fuel injector and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117345477A true CN117345477A (en) | 2024-01-05 |
Family
ID=89359505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311477536.8A Pending CN117345477A (en) | 2023-11-07 | 2023-11-07 | Dual fuel injector and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117345477A (en) |
-
2023
- 2023-11-07 CN CN202311477536.8A patent/CN117345477A/en active Pending
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