CN114876654B - Control method of engine adopting ammonia and hydrogen dual fuel - Google Patents
Control method of engine adopting ammonia and hydrogen dual fuel Download PDFInfo
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- CN114876654B CN114876654B CN202210685284.7A CN202210685284A CN114876654B CN 114876654 B CN114876654 B CN 114876654B CN 202210685284 A CN202210685284 A CN 202210685284A CN 114876654 B CN114876654 B CN 114876654B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
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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
- F02B19/1085—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 controlling 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
- F02B19/12—Engines characterised by precombustion chambers with positive ignition
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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
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
- F02B43/12—Methods of operating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
- F02D19/024—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0607—Control of components of the fuel supply system to adjust the fuel mass or volume flow
- F02D19/061—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0697—Arrangement of fuel supply systems on engines or vehicle bodies; Components of the fuel supply system being combined with another device
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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)
- Oil, Petroleum & Natural Gas (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention discloses a control method of an engine adopting ammonia and hydrogen dual-fuel, which mainly comprises an engine, a precombustion chamber, a hydrogen nozzle, a spark plug, a buffer tank, a reformer, a valve, an ammonia nozzle and the like. When the engine is in a low-speed medium-small load or idle working condition, the electronic control unit of the engine controls the equivalent ratio of hydrogen to air in the precombustion chamber to be 0.1-0.7, and controls the jet quantity range of ammonia in each working cycle of the engine to be 20-40 mg; when the engine is in a high-speed and high-load working condition, the electronic control unit of the engine controls the jet quantity of hydrogen in each working cycle of the engine to be 5-10 mg, and controls the jet quantity of ammonia in each working cycle of the engine to be 150-200 mg. The method can effectively solve the problem of difficult ignition of the ammonia fuel due to high vaporization latent heat and high octane number, and can also solve the problem of difficult storage and transportation of the hydrogen fuel.
Description
Technical Field
The invention relates to the field of engines, in particular to a control method of an engine adopting ammonia and hydrogen dual-fuel.
Background
In the working process of a traditional diesel engine, diesel oil is sprayed into an engine cylinder through an in-cylinder direct-injection oil sprayer, is mixed with air and combusted in the cylinder, and residual waste gas is discharged out of the engine through an exhaust pipe. Because diesel oil has poor volatility, is difficult to form uniform mixed gas with air, has incomplete combustion, and because diesel oil is carbon-based fuel, the traditional diesel engine has higher oil consumption and carbon emission.
While ammonia and hydrogen engines are currently the main carbon-free fuel engines, there are certain problems with single ammonia and hydrogen engines, such as higher ignition and minimum ignition energy, slower combustion speed, and lower combustion temperature in a single ammonia engine (Wang Yang, zhou Xiaohu, liu Long. An ammonia engine supply system [ P ]. Cn114183242a ]) and abnormal combustion in engine cylinders due to different hydrogen properties in a single hydrogen engine (Han Linghai, zhang Yu, mach-yang, qian Dingchao, li Chunyu, wang Zhanfeng, yellow wisdom, li Hua, gong Yanfeng. Hydrogen engine system, vehicle and control methods for hydrogen engine system [ P ]. Cn114320581 a.).
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a control method of an engine adopting ammonia and hydrogen dual fuel, which can get rid of the dependence of the engine on fossil fuel and can reduce the energy and carbon emission of the engine to the maximum extent.
In order to achieve the above object, the control method of the engine adopting ammonia and hydrogen dual fuel of the invention comprises the following steps:
step one, installing a dual-fuel engine adopting ammonia and hydrogen, wherein the dual-fuel engine comprises a precombustion chamber installation hole and an ammonia nozzle installation hole which are formed in an engine cylinder cover, an air injection outlet of the ammonia nozzle is arranged in the ammonia nozzle installation hole, the front end of the precombustion chamber is arranged in the precombustion chamber installation hole, and a hydrogen nozzle and a spark plug for igniting the hydrogen are arranged in the precombustion chamber; the ammonia gas nozzle is communicated with the liquid ammonia tank through an ammonia gas pipeline provided with a first valve and a second valve, one end of the hydrogen gas pipeline penetrates through the precombustion chamber to be communicated with the hydrogen gas nozzle, the other end of the hydrogen gas pipeline is sequentially connected with the buffer tank, the ammonia reforming hydrogen production equipment, the third valve and the ammonia gas pipeline between the first valve and the second valve, and the hydrogen gas nozzle, the ammonia reforming hydrogen production equipment, the first valve, the second valve and the third valve are connected with an electronic control unit of the engine;
when the engine is in a low-speed medium-small load or idle working condition, the electronic engine control unit outputs control signals to the second valve, the third valve, the ammonia reforming hydrogen production equipment and the hydrogen nozzle to regulate and control the injection quantity of hydrogen so that the equivalent ratio in the precombustion chamber is 0.1-0.7, wherein the equivalent ratio is the ratio of the actual hydrogen quantity to the air quantity in the precombustion chamber divided by the theoretical equivalent ratio; the electronic control unit of the engine outputs control signals to the first valve and the ammonia nozzle, and the air injection amount of the ammonia in each working cycle of the engine ranges from 20 mg to 40 mg;
when the engine is in a high-speed and large-load working condition, the electronic control unit of the engine outputs control signals to the second valve, the third valve, the ammonia reforming hydrogen production equipment and the hydrogen nozzle to regulate and control the injection quantity of hydrogen, and the injection quantity of hydrogen in each working cycle of the engine is 5-10 mg; the electronic control unit of the engine outputs control signals to the first valve and the ammonia nozzle to control the jet quantity of ammonia in each working cycle of the engine to be 150-200 mg.
Compared with the prior art, the invention has the following beneficial effects:
the method can effectively solve the problem of ignition difficulty of the ammonia fuel due to high vaporization latent heat and high octane number, and can also solve the problem of difficult storage and transportation of the hydrogen fuel.
Drawings
FIG. 1 is a schematic diagram of a device structure used in a control method of a dual-fuel engine using ammonia and hydrogen.
Detailed Description
The invention will now be described in detail with reference to the drawings and to specific embodiments.
The invention discloses a control method of an engine adopting ammonia and hydrogen dual-fuel, which is shown in the attached drawings and comprises the following steps:
step one, a dual-fuel engine adopting ammonia and hydrogen is installed, wherein the dual-fuel engine comprises a precombustion chamber installation hole and an ammonia nozzle installation hole which are formed in an engine cylinder cover, an air injection outlet of an ammonia nozzle 5 is installed in the ammonia nozzle installation hole, the front end of a precombustion chamber 2 is installed in the precombustion chamber installation hole, and a hydrogen nozzle 3 and a spark plug 4 for igniting hydrogen are installed in the precombustion chamber 2; the ammonia nozzle 5 is communicated with the liquid ammonia tank 11 through an ammonia pipeline provided with a first valve 9 and a second valve 10, one end of a hydrogen pipeline penetrates through the precombustion chamber 2 to be communicated with the hydrogen nozzle 3, and the other end of the hydrogen pipeline is sequentially connected with the buffer tank 6, the ammonia reforming hydrogen production equipment 7, a third valve 8 and the ammonia pipeline between the first valve 9 and the second valve 10. The hydrogen nozzle 3, the ammonia nozzle 5, the ammonia reforming hydrogen production equipment 7, the first valve 9, the second valve 10 and the third valve 8 are connected with an engine electronic control unit. The dual-fuel engine is improved on the basis of the existing engine, and the part which is not improved adopts the existing structure. The ammonia reforming hydrogen production equipment adopts the existing ammonia hydrogen production equipment, and as can be seen from the inventor: zhang Tong, zhang Junlin, zhang Han, zhong Hao Chinese patent publication No. CN113896169A entitled "Hydrogen production System with liquid ammonia".
And secondly, when the engine is in a low-speed medium-small load or idle working condition, the engine is easy to run unstably or even fire due to the characteristics of low ammonia activity, large vaporization latent heat and low flame speed. At this time, the hydrogen produced on-line by the ammonia reforming hydrogen production device can be used as the main fuel of the engine, and the ammonia can be used as the auxiliary fuel to provide power output; the electronic engine control unit outputs control signals to the second valve 10, the third valve 8, the ammonia reforming hydrogen production equipment 7 and the hydrogen nozzle 3 to regulate the injection quantity of the hydrogen so that the equivalent ratio in the precombustion chamber 2 is about 0.1-0.7 (for example, 0.1, 0.3, 0.5, 0.7 and the like), wherein the equivalent ratio refers to the ratio of the actual hydrogen quantity to the air quantity in the precombustion chamber divided by the theoretical equivalent ratio; the electronic control unit of the engine outputs control signals to the first valve 9 and the ammonia nozzle 5, the jet amount of ammonia in each working cycle of the engine is 20-40 mg (for example, 20 mg, 25 mg, 30 mg, 40 mg and the like), four working strokes of the engine are air intake, compression, acting and expansion, and four strokes are one cycle.
When the engine is in a high-speed and high-load working condition, the in-cylinder pressure and the temperature are high, so that ammonia can be used as main fuel of the engine, and the ammonia in the main combustion chamber 12 is ignited by the hydrogen jet flame of the precombustion chamber, so that compression ignition of the ammonia is realized. At this time, the electronic control unit of the engine outputs control signals to the second valve 10, the third valve 8, the ammonia reforming hydrogen production device 7 and the hydrogen nozzle 3 to regulate the injection amount of hydrogen, and the injection amount of hydrogen in each working cycle of the engine ranges from 5 mg to 10 mg (for example, may be 5 mg, 6 mg, 8 mg, 10 mg, etc.); the electronic control unit of the engine outputs control signals to the first valve 9 and the ammonia nozzle 5 to control the jet amount of ammonia in each working cycle of the engine to be 150-200 mg (such as 150 mg, 160 mg, 180 mg, 200 mg, etc.).
The ammonia injection amount and the hydrogen injection amount under different loads can be calibrated in advance by an electronic control unit of the engine, and after the MAP is obtained, the ammonia injection amount and the hydrogen injection amount are adjusted and corrected according to different load working conditions. The method is suitable for the traditional diesel engine, the oil quantity of the small load of the general engine is about 20-30 milliequivalents of diesel oil per cycle, the large load is about 100 milliequivalents of diesel oil per cycle, and the equivalent diesel oil can be obtained by converting the heat values of the diesel oil, the hydrogen and the ammonia.
It will be apparent to those skilled in the art that the above-described embodiments are merely some, but not all embodiments of the invention, which can be embodied in other specific forms without departing from the essential characteristics of the invention. The embodiments are to be considered in all respects as illustrative and not restrictive. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (1)
1. The control method of the engine adopting ammonia and hydrogen dual fuel is characterized by comprising the following steps:
step one, installing a dual-fuel engine adopting ammonia and hydrogen, wherein the dual-fuel engine comprises a precombustion chamber installation hole and an ammonia nozzle installation hole which are formed in an engine cylinder cover, an air injection outlet of the ammonia nozzle is arranged in the ammonia nozzle installation hole, the front end of the precombustion chamber is arranged in the precombustion chamber installation hole, and a hydrogen nozzle and a spark plug for igniting the hydrogen are arranged in the precombustion chamber; the ammonia gas nozzle is communicated with the liquid ammonia tank through an ammonia gas pipeline provided with a first valve and a second valve, one end of the hydrogen gas pipeline penetrates through the precombustion chamber to be communicated with the hydrogen gas nozzle, the other end of the hydrogen gas pipeline is sequentially connected with the buffer tank, the ammonia reforming hydrogen production equipment, the third valve and the ammonia gas pipeline between the first valve and the second valve, and the hydrogen gas nozzle, the ammonia reforming hydrogen production equipment, the first valve, the second valve and the third valve are connected with an electronic control unit of the engine;
when the engine is in a low-speed medium-small load or idle working condition, the electronic engine control unit outputs control signals to the second valve, the third valve, the ammonia reforming hydrogen production equipment and the hydrogen nozzle to regulate and control the injection quantity of hydrogen so that the equivalent ratio in the precombustion chamber is 0.1-0.7, wherein the equivalent ratio is the ratio of the actual hydrogen quantity to the air quantity in the precombustion chamber divided by the theoretical equivalent ratio; the electronic control unit of the engine outputs control signals to the first valve and the ammonia nozzle, and the air injection amount of the ammonia in each working cycle of the engine ranges from 20 mg to 40 mg;
when the engine is in a high-speed and large-load working condition, the electronic control unit of the engine outputs control signals to the second valve, the third valve, the ammonia reforming hydrogen production equipment and the hydrogen nozzle to regulate and control the injection quantity of hydrogen, and the injection quantity of hydrogen in each working cycle of the engine is 5-10 mg; the electronic control unit of the engine outputs control signals to the first valve and the ammonia nozzle to control the jet quantity of ammonia in each working cycle of the engine to be 150-200 mg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210685284.7A CN114876654B (en) | 2022-06-17 | 2022-06-17 | Control method of engine adopting ammonia and hydrogen dual fuel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210685284.7A CN114876654B (en) | 2022-06-17 | 2022-06-17 | Control method of engine adopting ammonia and hydrogen dual fuel |
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| Publication Number | Publication Date |
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| CN114876654A CN114876654A (en) | 2022-08-09 |
| CN114876654B true CN114876654B (en) | 2023-09-26 |
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| CN202210685284.7A Active CN114876654B (en) | 2022-06-17 | 2022-06-17 | Control method of engine adopting ammonia and hydrogen dual fuel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201602617D0 (en) * | 2016-02-15 | 2016-03-30 | Siemens Ag | Method and equipment for combustion of ammonia |
| CN109098834A (en) * | 2018-09-20 | 2018-12-28 | 天津大学 | A kind of combustion system of engine of efficient multiple combustion mode |
| CN111255560A (en) * | 2020-01-15 | 2020-06-09 | 北京工业大学 | Hydrogen-ammonia dual-fuel piston machine and control method |
| CN113586261A (en) * | 2021-08-02 | 2021-11-02 | 北京工业大学 | Hydrogen/ammonia dual-fuel engine and control method |
| CN114576028A (en) * | 2021-12-23 | 2022-06-03 | 北京工业大学 | Hydrogen-doped direct injection ammonia engine in cylinder and control method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8091342B2 (en) * | 2009-01-28 | 2012-01-10 | GM Global Technology Operations LLC | Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system |
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2022
- 2022-06-17 CN CN202210685284.7A patent/CN114876654B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201602617D0 (en) * | 2016-02-15 | 2016-03-30 | Siemens Ag | Method and equipment for combustion of ammonia |
| CN109098834A (en) * | 2018-09-20 | 2018-12-28 | 天津大学 | A kind of combustion system of engine of efficient multiple combustion mode |
| CN111255560A (en) * | 2020-01-15 | 2020-06-09 | 北京工业大学 | Hydrogen-ammonia dual-fuel piston machine and control method |
| CN113586261A (en) * | 2021-08-02 | 2021-11-02 | 北京工业大学 | Hydrogen/ammonia dual-fuel engine and control method |
| CN114576028A (en) * | 2021-12-23 | 2022-06-03 | 北京工业大学 | Hydrogen-doped direct injection ammonia engine in cylinder and control method thereof |
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| CN114876654A (en) | 2022-08-09 |
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