CN114198214A - Control method of interactive combustion-supporting dual-fuel internal combustion engine injection system - Google Patents
Control method of interactive combustion-supporting dual-fuel internal combustion engine injection system Download PDFInfo
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- CN114198214A CN114198214A CN202111532522.2A CN202111532522A CN114198214A CN 114198214 A CN114198214 A CN 114198214A CN 202111532522 A CN202111532522 A CN 202111532522A CN 114198214 A CN114198214 A CN 114198214A
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- 239000000446 fuel Substances 0.000 title claims abstract description 260
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 44
- 238000002347 injection Methods 0.000 title claims abstract description 35
- 239000007924 injection Substances 0.000 title claims abstract description 35
- 230000002452 interceptive effect Effects 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 372
- 239000003921 oil Substances 0.000 claims description 47
- 239000000295 fuel oil Substances 0.000 claims description 26
- 239000002828 fuel tank Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000007907 direct compression Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- 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
- F02D19/0686—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
- F02D19/0673—Valves; Pressure or flow regulators; Mixers
-
- 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
- F02D19/0673—Valves; Pressure or flow regulators; Mixers
- F02D19/0681—Shut-off valves; Check valves; Safety valves; Pressure relief valves
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a control method of an interactive combustion-supporting dual-fuel internal combustion engine injection system, wherein the dual-fuel internal combustion engine injection system comprises two oil tanks, a high-pressure pump, a high-carbon fuel rail, a low-carbon or zero-carbon fuel rail, a high-carbon fuel injector and a low-carbon or zero-carbon fuel injector; when the internal combustion engine is started, high-carbon fuel and low-carbon or zero-carbon fuel are respectively conveyed to a high-carbon fuel rail and a low-carbon or zero-carbon fuel rail from two oil tanks; the high-carbon fuel injector and the low-carbon or zero-carbon fuel injector are injected into a combustion chamber of the internal combustion engine, and the electronic control unit flexibly controls the high-carbon fuel injector and the low-carbon or zero-carbon fuel injector according to different working condition requirements. Compared with the prior art, the high-pressure oil of the high-carbon fuel can be used as the control oil and the sealing oil of the low-carbon fuel injector, and the problems of control valve corrosion and poor sealing caused by low viscosity of the low-carbon fuel can be effectively solved.
Description
Technical Field
The invention belongs to a fuel injection system of an internal combustion engine, and particularly relates to a control method of an interactive combustion-supporting dual-fuel internal combustion engine injection system.
Background
In the future, the aim of carbon neutralization is fulfilled, and the use ratio of fossil energy such as coal, petroleum, natural gas and the like is greatly reduced; renewable energy sources such as solar energy, wind energy and the like become main energy sources. Renewable energy utilization mode, except for power generation and grid integration; it can also be used for electrolyzing water to produce hydrogen, or simultaneously producing synthetic fuels such as methanol, ammonia and the like.
Compared with fuel cells and power cells, the internal combustion engine has the advantages of high energy density, good economy, high working reliability, long service life and the like.
In order to achieve the goal of carbon neutralization, the fuel of the internal combustion engine must use synthetic low-carbon fuel or zero-carbon fuel, such as methanol, ethanol, dimethyl ether and hydrogen, ammonia gas, etc.; in addition, it is desirable to maximize the efficiency of internal combustion engines, such as diffusion combustion modes using the diesel cycle.
The autoignition temperatures of the low-carbon fuel and the zero-carbon fuel are mostly higher, such as higher than 400 ℃, and the low-carbon fuel and the zero-carbon fuel are not suitable for working in a direct compression ignition mode like diesel oil.
Therefore, another high-carbon fuel with a relatively low autoignition temperature is needed to be injected to ignite and burn, for example, the autoignition temperature is lower than 250 ℃; the low-carbon fuel or the zero-carbon fuel is used as the main fuel and is injected into the combustion chamber for combustion after the pilot fuel is combusted.
The applicant, on search, found that the following prior art,
the publication number is: a CN1470758A dimethyl ether engine high-efficiency and ultra-low emission combustion system;
the publication number is: CN1755088A diesel engine used suction pipe injection type dimethyl ether liquid fuel supply system;
the publication number is: CN2903449Y, multiple liquid fuel compression ignition engine system;
the publication number is: an on-line diesel oil and dimethyl ether mixed oil supply system of CN 102562392A;
the publication number is: CN105114193A A methanol-diesel dual-fuel diesel engine fuel supply method;
the publication number is: CN109931188A, a compression ignition type dual fuel internal combustion engine system;
the publication number is: a light hydrocarbon-diesel mixed fuel supply system of a marine diesel engine of CN 208040592U;
the above prior art all belongs to the field, and the problem of solution all is that the realization dual fuel supplies with, through the analysis of above-mentioned prior art, all can't realize dual nozzle interactive, all adopts and supplies with control alone, can't realize combustion-supporting or combustion-supporting effect is poor. The dual-fuel injection system of the patent application aims to solve the problem of how to supply fuel when low-carbon synthetic fuel and zero-carbon fuel adopt a diffusion combustion mode.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a control method of an interactive combustion-supporting dual-fuel internal combustion engine injection system, which solves the problem of how to supply fuel when a low-carbon synthetic fuel and a zero-carbon fuel adopt a diffusion combustion mode.
The invention is realized in this way, a control method of an interactive combustion-supporting dual-fuel internal combustion engine injection system, the dual-fuel internal combustion engine injection system comprises two oil tanks, one of which is a high-carbon fuel oil tank (1), the other one is a low-carbon or zero-carbon fuel oil tank (2), and the high-carbon fuel, the low-carbon or zero-carbon fuel exist in liquid state in the two oil tanks; electric oil pumps are respectively arranged in the high-carbon fuel oil tank (1) and the low-carbon or zero-carbon fuel oil tank (2), and are respectively connected with an electric control unit (8); the two oil tanks are connected with two oil pumping units in the same high-pressure pump (3) through filters, and the high-pressure pump is characterized by comprising a high-carbon fuel rail (4) and a low-carbon or zero-carbon fuel rail (5) which are respectively connected through pipelines; a high-carbon fuel rail pressure sensor (6) is arranged on the high-carbon fuel rail; a low-carbon or zero-carbon fuel rail pressure sensor (7) is arranged on the low-carbon or zero-carbon fuel rail; the high-carbon fuel rail pressure sensor and the low-carbon or zero-carbon fuel rail pressure sensor are respectively connected with the electric control unit (8); a high-carbon fuel safety valve (9) is arranged on the high-carbon fuel rail, the high-carbon fuel safety valve is connected with a high-carbon fuel oil return pipeline through a pipeline, and the high-carbon fuel oil return pipeline is connected with a high-carbon fuel oil tank; the low-carbon or zero-carbon fuel rail is provided with a low-carbon or zero-carbon fuel safety valve (10), the low-carbon or zero-carbon fuel safety valve (10) is connected with a low-carbon or zero-carbon fuel return pipeline through a pipeline, and the low-carbon or zero-carbon fuel return pipeline is connected with a low-carbon or zero-carbon fuel tank (2);
the high-carbon fuel rail is connected with one high-pressure interface (11a) of the high-carbon fuel injector (11), and the low-carbon or zero-carbon fuel rail is connected with one high-pressure interface (12a) of the low-carbon or zero-carbon fuel injector (12) through a pipeline; the other high-pressure interface (11b) of the high-carbon fuel injector (11) is connected with the other high-pressure interface (12b) of the low-carbon or zero-carbon fuel injector (12) through a pipeline;
a high-carbon fuel electromagnetic valve (11d) of the high-carbon fuel injector (11) and a low-carbon or zero-carbon fuel electromagnetic valve (12d) of the low-carbon or zero-carbon fuel injector (12) are respectively connected with an electric control unit;
an oil return port (11e) of the high-carbon fuel injector (11) and an oil return port (12e) of the low-carbon or zero-carbon fuel injector (12) are connected with a high-carbon fuel oil return pipeline, and the high-carbon fuel oil return pipeline is connected with a high-carbon fuel oil tank (1);
the control method of the injection system of the dual-fuel internal combustion engine comprises the following steps: when the internal combustion engine is started, two oil pumping units of the high-pressure pump respectively extract high-carbon fuel and low-carbon or zero-carbon fuel from a high-carbon fuel tank (1) and a low-carbon or zero-carbon fuel tank (2); respectively conveyed to a high-carbon fuel rail (4) and a low-carbon or zero-carbon fuel rail (5); the in-rail pressures of the high-carbon fuel rail and the low-carbon or zero-carbon fuel rail are independent, and the in-rail pressure of the high-carbon fuel rail is always higher than the in-rail pressure of the low-carbon or zero-carbon fuel rail by at least 1 MPa; the high-carbon fuel rail (4) supplies high-carbon fuel to the high-carbon fuel injector (11) through a pipeline, the low-carbon or zero-carbon fuel rail supplies low-carbon or zero-carbon fuel to the low-carbon or zero-carbon fuel injector (12) through a pipeline, an oil nozzle (11c) of the high-carbon fuel injector (11) and an oil nozzle (12c) of the low-carbon or zero-carbon fuel injector (12) are injected into a combustion chamber of the internal combustion engine, and the injection pressure, the injection time and the injection pulse width of the high-carbon fuel and the low-carbon or zero-carbon fuel are flexibly controlled by an electric control unit (8) through a high-carbon fuel electromagnetic valve (11d) and a zero-carbon fuel electromagnetic valve (12d) according to different working condition requirements.
Preferably, when the rail internal pressures of the high-carbon fuel rail (4) and the low-carbon or zero-carbon fuel rail (5) exceed the limit safety pressure, the high-carbon fuel rail pressure sensor (6) or the low-carbon or zero-carbon fuel rail pressure sensor (7) feeds back the rail internal pressure to the electronic control unit, and the electronic control unit controls the supply pressure of the high-pressure oil pump to realize the flexible control of the rail internal pressures of the two fuels.
Preferably, after the high-carbon fuel safety valve (9) and the low-carbon or zero-carbon fuel safety valve (10) are opened, the fuel flows back to the corresponding high-carbon fuel tank (1) and the corresponding low-carbon or zero-carbon fuel tank (2) through pipelines.
The invention has the advantages and technical effects that: compared with the prior art, the double-nozzle interactive combustion-supporting dual-fuel internal combustion engine injection system adopting the technical scheme can use the high-pressure oil of the high-carbon fuel as the control oil and the sealing oil of the low-carbon fuel injector, can effectively avoid the problems of corrosion and poor sealing of a control valve caused by low viscosity of the low-carbon fuel, and simultaneously, the low-carbon or zero-carbon fuel of the low-carbon or zero-carbon fuel injector is completely injected into a combustion chamber without oil return.
Drawings
Fig. 1 is a control schematic of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an interactive combustion-supporting dual-fuel internal combustion engine injection system control method includes that the dual-fuel internal combustion engine injection system includes two fuel tanks, one of which is a high-carbon fuel tank 1, and the other is a low-carbon or zero-carbon fuel tank 2, electric oil pumps are respectively disposed in the high-carbon fuel tank 1 and the low-carbon or zero-carbon fuel tank 2, the electric oil pumps are respectively connected to an electric control unit 8, and the delivery pressure of the electric oil pumps is at least 0.3MPa, so as to ensure the supply of fuel; the two oil tanks are connected with two oil pumping units in the same high-pressure pump 3 after passing through a filter, and two high-carbon, low-carbon or zero-carbon fuels exist in the oil tanks in a liquid state; if the fuel is gaseous at normal temperature and pressure, such as ammonia, it needs to be liquefied at low temperature or under pressure in the fuel tank.
The high-pressure pump is respectively connected with a high-carbon fuel rail 4 and a low-carbon or zero-carbon fuel rail 5 through pipelines, rail internal pressures of the high-carbon fuel rail and the low-carbon or zero-carbon fuel rail are mutually independent, the rail internal pressure of the high-carbon fuel rail is always at least 1MPa higher than the rail internal pressure of the low-carbon or zero-carbon fuel rail, the pressure and the pressure difference of the two fuels can be correspondingly optimized and matched according to different requirements of different use working conditions on the injection pressure and the injection rate of the two fuels, the pressure difference can use high-pressure oil of the high-carbon fuel as control oil and sealing oil of a low-carbon or zero-carbon fuel injector, and the problems of corrosion and poor sealing of a control valve caused by low viscosity of the low-carbon or zero-carbon fuel can be effectively avoided; a high-carbon fuel rail pressure sensor 6 is arranged on the high-carbon fuel rail; a low-carbon or zero-carbon fuel rail pressure sensor 7 is arranged on the low-carbon or zero-carbon fuel rail; the high-carbon fuel rail pressure sensor and the low-carbon or zero-carbon fuel rail pressure sensor are respectively connected with the electric control unit 8; a high-carbon fuel safety valve 9 is arranged on the high-carbon fuel rail and is connected with a high-carbon fuel oil return pipeline through a pipeline, and the high-carbon fuel oil return pipeline is connected with a high-carbon fuel oil tank; the low-carbon or zero-carbon fuel rail is provided with a low-carbon or zero-carbon fuel safety valve 10, the low-carbon or zero-carbon fuel safety valve 10 is connected with a low-carbon or zero-carbon fuel return pipeline through a pipeline, and the low-carbon or zero-carbon fuel return pipeline is connected with a low-carbon or zero-carbon fuel tank 2;
the high-carbon fuel rail is connected with one of high-pressure interfaces 11a of the high-carbon fuel injectors 11, and the low-carbon or zero-carbon fuel rail is connected with one of high-pressure interfaces 12a of the low-carbon or zero-carbon fuel injectors 12 through pipelines; the other high-pressure interface 11b of the high-carbon fuel injector 11 is connected with the other high-pressure interface 12b of the low-carbon or zero-carbon fuel injector 12 through a pipeline;
the high-carbon fuel electromagnetic valve 11d of the high-carbon fuel injector 11 and the low-carbon or zero-carbon fuel electromagnetic valve 12d of the low-carbon or zero-carbon fuel injector 12 are respectively connected with an electric control unit;
the oil return port 11e of the high-carbon fuel injector 11 and the oil return port 12e of the low-carbon or zero-carbon fuel injector 12 are connected with a high-carbon fuel oil return pipeline, the high-carbon fuel oil return pipeline is connected with the high-carbon fuel oil tank 1, and the low-carbon or zero-carbon fuel of the low-carbon or zero-carbon fuel injector 12 is completely injected into the combustion chamber without oil return.
Preferably, the system further comprises a low-carbon or zero-carbon fuel storage container for storing low-carbon or zero-carbon fuel, the low-carbon fuel is liquid at normal temperature and normal pressure, the storage container can adopt an oil tank similar to the high-carbon fuel, the fuel such as propane, dimethyl ether, ammonia is gaseous at normal temperature and normal pressure, and the storage container is subject to high pressure, so that the fuel exists in the container in a high-pressure liquid form.
The control method of the interactive combustion-supporting dual-fuel internal combustion engine injection system comprises the following steps: when the internal combustion engine is started, two oil pumping units of the high-pressure pump respectively extract high-carbon fuel and low-carbon or zero-carbon fuel from a high-carbon fuel tank 1 and a low-carbon or zero-carbon fuel tank 2; to a high carbon fuel rail 4 and a low carbon or zero carbon fuel rail 5, respectively; the high-carbon fuel rail 4 supplies high-carbon fuel to the high-carbon fuel injector 11 through a pipeline, the low-carbon or zero-carbon fuel rail supplies low-carbon or zero-carbon fuel to the low-carbon or zero-carbon fuel injector 12 through a pipeline, the fuel injection nozzle 11c of the high-carbon fuel injector 11 and the fuel injection nozzle 12c of the low-carbon or zero-carbon fuel injector 12 are injected into a combustion chamber of the internal combustion engine, and the injection pressure, the injection time and the injection pulse width of the high-carbon fuel and the low-carbon or zero-carbon fuel are flexibly controlled by the electronic control unit 8 through the high-carbon fuel electromagnetic valve 11d and the zero-carbon fuel electromagnetic valve 12d according to different working condition requirements.
When the rail internal pressures of the high-carbon fuel rail 4 and the low-carbon or zero-carbon fuel rail 5 exceed the limit safety pressure, the high-carbon fuel rail pressure sensor 6 or the low-carbon or zero-carbon fuel rail pressure sensor 7 feeds back the rail internal pressure to the electronic control unit, and the electronic control unit controls the supply pressure of the high-pressure oil pump to realize the flexible control of the rail internal pressures of the two fuels.
When the high-carbon fuel safety valve 9 and the low-carbon or zero-carbon fuel safety valve 10 are opened, the fuel flows back to the corresponding high-carbon fuel tank 1 and the corresponding low-carbon or zero-carbon fuel tank 2 through pipelines.
Compared with the prior art, the double-nozzle interactive combustion-supporting dual-fuel internal combustion engine injection system adopting the technical scheme can use the high-pressure oil of the high-carbon fuel as the control oil and the sealing oil of the low-carbon fuel injector, and can effectively avoid the problems of corrosion and poor sealing of the control valve caused by low viscosity of the low-carbon fuel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. An interactive combustion-supporting dual-fuel internal combustion engine injection system control method is characterized in that the dual-fuel internal combustion engine injection system comprises two oil tanks, wherein one oil tank is a high-carbon fuel oil tank (1), the other oil tank is a low-carbon or zero-carbon fuel oil tank (2), and the high-carbon fuel, the low-carbon or zero-carbon fuel exist in the two oil tanks in a liquid state; electric oil pumps are respectively arranged in the high-carbon fuel oil tank (1) and the low-carbon or zero-carbon fuel oil tank (2), and are respectively connected with an electric control unit (8); the two oil tanks are connected with two oil pumping units in the same high-pressure pump (3) through filters, and the high-pressure pump is characterized by comprising a high-carbon fuel rail (4) and a low-carbon or zero-carbon fuel rail (5) which are respectively connected through pipelines; a high-carbon fuel rail pressure sensor (6) is arranged on the high-carbon fuel rail; a low-carbon or zero-carbon fuel rail pressure sensor (7) is arranged on the low-carbon or zero-carbon fuel rail; the high-carbon fuel rail pressure sensor and the low-carbon or zero-carbon fuel rail pressure sensor are respectively connected with the electric control unit (8); a high-carbon fuel safety valve (9) is arranged on the high-carbon fuel rail, the high-carbon fuel safety valve is connected with a high-carbon fuel oil return pipeline through a pipeline, and the high-carbon fuel oil return pipeline is connected with a high-carbon fuel oil tank; the low-carbon or zero-carbon fuel rail is provided with a low-carbon or zero-carbon fuel safety valve (10), the low-carbon or zero-carbon fuel safety valve (10) is connected with a low-carbon or zero-carbon fuel return pipeline through a pipeline, and the low-carbon or zero-carbon fuel return pipeline is connected with a low-carbon or zero-carbon fuel tank (2);
the high-carbon fuel rail is connected with one high-pressure interface (11a) of the high-carbon fuel injector (11), and the low-carbon or zero-carbon fuel rail is connected with one high-pressure interface (12a) of the low-carbon or zero-carbon fuel injector (12) through a pipeline; the other high-pressure interface (11b) of the high-carbon fuel injector (11) is connected with the other high-pressure interface (12b) of the low-carbon or zero-carbon fuel injector (12) through a pipeline;
a high-carbon fuel electromagnetic valve (11d) of the high-carbon fuel injector (11) and a low-carbon or zero-carbon fuel electromagnetic valve (12d) of the low-carbon or zero-carbon fuel injector (12) are respectively connected with an electric control unit;
an oil return port (11e) of the high-carbon fuel injector (11) and an oil return port (12e) of the low-carbon or zero-carbon fuel injector (12) are connected with a high-carbon fuel oil return pipeline, and the high-carbon fuel oil return pipeline is connected with a high-carbon fuel oil tank (1);
the control method of the injection system of the dual-fuel internal combustion engine comprises the following steps: when the internal combustion engine is started, two oil pumping units of the high-pressure pump respectively extract high-carbon fuel and low-carbon or zero-carbon fuel from a high-carbon fuel tank (1) and a low-carbon or zero-carbon fuel tank (2); respectively conveyed to a high-carbon fuel rail (4) and a low-carbon or zero-carbon fuel rail (5); the in-rail pressures of the high-carbon fuel rail and the low-carbon or zero-carbon fuel rail are independent, and the in-rail pressure of the high-carbon fuel rail is always higher than the in-rail pressure of the low-carbon or zero-carbon fuel rail by at least 1 MPa; the high-carbon fuel rail (4) supplies high-carbon fuel to the high-carbon fuel injector (11) through a pipeline, the low-carbon or zero-carbon fuel rail supplies low-carbon or zero-carbon fuel to the low-carbon or zero-carbon fuel injector (12) through a pipeline, an oil nozzle (11c) of the high-carbon fuel injector (11) and an oil nozzle (12c) of the low-carbon or zero-carbon fuel injector (12) are injected into a combustion chamber of the internal combustion engine, and the injection pressure, the injection time and the injection pulse width of the high-carbon fuel and the low-carbon or zero-carbon fuel are flexibly controlled by an electric control unit (8) through a high-carbon fuel electromagnetic valve (11d) and a zero-carbon fuel electromagnetic valve (12d) according to different working condition requirements.
2. The control method of the interactive combustion-supporting dual-fuel internal combustion engine injection system according to claim 1, characterized in that: when the rail internal pressures of the high-carbon fuel rail (4) and the low-carbon or zero-carbon fuel rail (5) exceed the limit safety pressure, the high-carbon fuel rail pressure sensor (6) or the low-carbon or zero-carbon fuel rail pressure sensor (7) feeds back the rail internal pressure to the electronic control unit, and the electronic control unit controls the supply pressure of the high-pressure oil pump to realize the flexible control of the rail internal pressures of the two fuels.
3. The control method of the interactive combustion-supporting dual-fuel internal combustion engine injection system according to claim 1, characterized in that: when the high-carbon fuel safety valve (9) and the low-carbon or zero-carbon fuel safety valve (10) are opened, the fuel flows back to the corresponding high-carbon fuel tank (1) and the corresponding low-carbon or zero-carbon fuel tank (2) through pipelines.
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| CN202111532522.2A CN114198214B (en) | 2021-12-15 | 2021-12-15 | Control method for injection system of interactive combustion-supporting dual-fuel internal combustion engine |
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| CN202111532522.2A CN114198214B (en) | 2021-12-15 | 2021-12-15 | Control method for injection system of interactive combustion-supporting dual-fuel internal combustion engine |
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| CN114198214A true CN114198214A (en) | 2022-03-18 |
| CN114198214B CN114198214B (en) | 2024-05-10 |
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Citations (20)
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