CN216518365U - Double-nozzle interactive combustion-supporting type dual-fuel internal combustion engine injection system - Google Patents
Double-nozzle interactive combustion-supporting type dual-fuel internal combustion engine injection system Download PDFInfo
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- CN216518365U CN216518365U CN202123147228.8U CN202123147228U CN216518365U CN 216518365 U CN216518365 U CN 216518365U CN 202123147228 U CN202123147228 U CN 202123147228U CN 216518365 U CN216518365 U CN 216518365U
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- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model discloses a double-nozzle interactive combustion-supporting type dual-fuel internal combustion engine injection system, which comprises two oil tanks, wherein the two oil tanks are connected with the same high-pressure pump, and the high-pressure pump is respectively connected with a high-carbon fuel rail and a low-carbon or zero-carbon fuel rail through pipelines; a high-carbon fuel rail pressure sensor and a low-carbon or zero-carbon fuel rail pressure sensor which are connected with the connecting electric control unit are arranged on the high-carbon fuel rail and the low-carbon or zero-carbon fuel rail; the high-carbon fuel rail is connected with the high-carbon fuel injector; the low-carbon or zero-carbon fuel rail is connected with a low-carbon or zero-carbon fuel injector through a pipeline; the high-carbon fuel injector is connected with the low-carbon or zero-carbon fuel injector; and the oil return port of the high-carbon fuel injector and the oil return port of the low-carbon or zero-carbon fuel injector are connected with a high-carbon fuel oil return pipeline. 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 utility model belongs to a fuel injection system of an internal combustion engine, and particularly relates to a double-nozzle interactive combustion-supporting type 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.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a double-nozzle interactive combustion-supporting type dual-fuel internal combustion engine injection system which solves the problem of how to supply fuel when low-carbon synthetic fuel and zero-carbon fuel adopt a diffusion combustion mode.
The utility model is realized in this way, a double-nozzle interactive combustion-supporting type dual-fuel internal combustion engine injection system, comprising two oil tanks, wherein one is a high-carbon fuel oil tank (1), the other is a low-carbon or zero-carbon fuel oil tank (2), 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 the electric oil pumps 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).
Preferably, a low-carbon or zero-carbon fuel storage container is further included for storing the low-carbon or zero-carbon fuel.
Preferably, the delivery pressure of the electric oil pump is at least 0.3 MPa.
The utility model 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 high-pressure oil of high-carbon fuel as control oil and sealing oil of a 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 utility model and are not intended to limit the utility model.
Referring to fig. 1, a dual-nozzle interactive combustion-supporting dual-fuel internal combustion engine injection system includes two fuel tanks, one of which is a high-carbon fuel tank 1, the other is a low-carbon or zero-carbon fuel tank 2, electric oil pumps are respectively arranged in the high-carbon fuel tank 1 and the low-carbon or zero-carbon fuel tank 2, the electric oil pumps are respectively connected with 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 double-nozzle 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 utility model, 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. A double-nozzle interactive combustion-supporting type 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), 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 the electric oil pumps 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).
2. The dual-nozzle interactive combustion-supporting dual-fuel internal combustion engine injection system according to claim 1, characterized in that: the low-carbon or zero-carbon fuel storage container is used for storing low-carbon or zero-carbon fuel.
3. The dual-nozzle interactive combustion-supporting dual-fuel internal combustion engine injection system according to claim 1, characterized in that: the delivery pressure of the electric oil pump is at least 0.3 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123147228.8U CN216518365U (en) | 2021-12-15 | 2021-12-15 | Double-nozzle interactive combustion-supporting type dual-fuel internal combustion engine injection system |
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| CN202123147228.8U CN216518365U (en) | 2021-12-15 | 2021-12-15 | Double-nozzle interactive combustion-supporting type dual-fuel internal combustion engine injection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114198214A (en) * | 2021-12-15 | 2022-03-18 | 北油电控燃油喷射系统(天津)有限公司 | Control method of interactive combustion-supporting dual-fuel internal combustion engine injection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114198214A (en) * | 2021-12-15 | 2022-03-18 | 北油电控燃油喷射系统(天津)有限公司 | Control method of interactive combustion-supporting dual-fuel internal combustion engine injection system |
| CN114198214B (en) * | 2021-12-15 | 2024-05-10 | 北油电控燃油喷射系统(天津)有限公司 | Control method for injection system of interactive combustion-supporting dual-fuel internal combustion engine |
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