CN112267959A - EGR gas-assisted aviation kerosene injection system - Google Patents
EGR gas-assisted aviation kerosene injection system Download PDFInfo
- Publication number
- CN112267959A CN112267959A CN202011125387.5A CN202011125387A CN112267959A CN 112267959 A CN112267959 A CN 112267959A CN 202011125387 A CN202011125387 A CN 202011125387A CN 112267959 A CN112267959 A CN 112267959A
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- Prior art keywords
- gas
- assisted
- egr
- injection
- fuel
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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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
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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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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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
- F02M57/00—Fuel-injectors combined or associated with other devices
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to an EGR gas-assisted aviation kerosene injection system, which comprises an EGR system, a gas-assisted fuel injector, an oil supply system and an ECU control system; the gas-assisted fuel injector comprises a fuel injection nozzle, a gas injection nozzle, a mixing cavity, a fuel injection electromagnetic valve, a gas injection electromagnetic valve and a gas inlet, and is characterized in that an EGR system is connected with the gas-assisted fuel injector through a gas path pipeline, the mixing cavity is communicated with the gas inlet, and compressed EGR gas processed by the EGR system is sent into the mixing cavity through the gas inlet. The invention finally realizes good aviation kerosene atomization effect, effectively inhibits detonation and improves the performance of the engine.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to an EGR gas (exhaust gas recirculation) auxiliary aviation kerosene injection system.
Background
The air-assisted injection mode is adopted to improve fuel atomization, and the air-assisted injection mode is mainly applied to the two-stroke gasoline engine in the early stage, so that the charge loss in the scavenging process of the two-stroke gasoline engine can be reduced, the fuel economy is improved, and the hydrocarbon emission is reduced. The fuel metering device has the advantages that the fuel injection and the fuel metering are carried out separately, so that the accuracy and the stability of the fuel injection amount under the high-temperature condition can be ensured; the power performance and fuel economy of the engine are improved by air-assisted injection. The air-assisted direct injection system in the cylinder can realize small atomization particle size, low penetration degree and narrow spray cone angle, and realize good fuel spray quality
The current light power plant is mainly based on aviation gasoline fuel, but has the characteristics of low flash point, high volatility and easy ignition, and has larger safety risk in the transportation and use processes. Compared with aviation gasoline, aviation kerosene has the characteristics of high flash point, high viscosity, difficult volatilization and the like, is high in use safety performance, and has a wide application prospect in military unmanned aerial vehicles. However, as the atomization effect of aviation kerosene is poor, the combustion characteristic is greatly changed compared with gasoline, particularly the flame propagation speed is slow, so that the cold start of an engine is difficult, and a spark plug is easy to submerge a cylinder and deposit carbon. In addition, because the octane number of the aviation kerosene is low and the antiknock property is poor, the detonation is easily caused in a cylinder, the normal work and the service life of an engine are seriously influenced, and the power and the economical efficiency of the engine are restricted to be poor.
The atomizing of aviation kerosene is difficult, and the atomizing state of fuel directly determines the forming process of gas mixture, for solving the atomizing problem of aviation kerosene to adopt conventional air auxiliary device still to have the space of great promotion in the aspect of improving atomization effect at present, also can not play the effect of suppression detonation simultaneously, still need to take the strategy alone and carry out the knock suppression. Therefore, the EGR auxiliary injection device provided by the invention can improve atomization and inhibit knocking, and has a certain reference value for solving engineering problems.
Disclosure of Invention
The invention provides an EGR gas-assisted aviation kerosene injection system, which aims to make up the defects of the existing air-assisted injection, further improve the atomization effect and inhibit knocking. This system is through introducing gaseous the gas-assisted sprayer of EGR, utilizes gaseous supplementary aviation kerosene injection of EGR, improves atomization effect, and the gaseous EGR that introduces simultaneously can better restrain the detonation to can suitably improve fuel and EGR gas pressure, further improve aviation kerosene atomization effect, it is effectual to finally realize aviation kerosene atomization through above technical route, effectively restrain the detonation, improves engine performance. The technical scheme adopted by the invention is as follows:
an EGR gas-assisted aviation kerosene injection system comprises an EGR system, a gas-assisted fuel injector, an oil supply system and an ECU control system; the gas-assisted fuel injector comprises a fuel injection nozzle, a gas injection nozzle, a mixing cavity, a fuel injection electromagnetic valve, a gas injection electromagnetic valve and a gas inlet, and is characterized in that an EGR system is connected with the gas-assisted fuel injector through a gas path pipeline, the mixing cavity is communicated with the gas inlet, and compressed EGR gas processed by the EGR system is sent into the mixing cavity through the gas inlet.
Compared with the prior art, the technical route of the invention has the following beneficial effects:
1) by adopting the EGR gas-assisted fuel injection method, on one hand, the problem of air source in the air-assisted direct injection technology is solved, no additional gas source is needed, on the other hand, the outlet temperature of the exhaust gas cooled by the EGR intercooler reaches 120-160 ℃, and the high-temperature exhaust gas can be mixed with the fuel in the nozzle to promote fuel atomization, thereby further improving the atomization quality of the aviation kerosene.
2) The existing air-assisted direct injection technology needs to adopt a strategy alone to inhibit knocking, and the EGR-assisted injection technology is adopted in the invention, and the two technologies are combined together, so that fuel atomization is promoted, the knocking is inhibited, and the structure is simpler.
Drawings
FIG. 1 is a schematic view of a gas-assisted jet aviation kerosene system
FIG. 2 is a schematic diagram of the internal structure of the gas-assisted fuel injector
The above figures are labeled as follows:
an oil supply system 1; an EGR system 2; a gas-assisted injector 3; an ECU control system 4; a fuel tank 101; a low-pressure oil pump 102; an oil pressure gauge 103; an EGR valve 201; an intercooler 202; a compressor 203; a pressure gauge 204; gas nozzle 301 injector housing 302 gas inlet 303; a fuel inlet 304; an oil injection solenoid valve 305; an oil jet 306; a mixing chamber 307; an air injection solenoid valve 308.
Detailed Description
As shown in fig. 1, the present invention includes an oil supply system 1, an EGR system 2, a gas-assisted injector 3, and an ECU control system 4. The EGR system 2 is connected with the gas auxiliary fuel injector 3 through a gas path pipeline, and the oil supply system 1 is connected with the gas auxiliary fuel injector 3 through an oil path pipeline. The fuel supply system 1 pressurizes the jet fuel from the fuel tank 101 via the low pressure pump 102, and adjusts the pressure using the oil pressure gauge 103, thereby finally introducing the jet fuel of 8bar into the fuel inlet 304 of the gas pilot injector 3. The EGR gas discharged after the engine works controls the amount of the EGR gas through an EGR valve 201 in an EGR system 2, then the EGR gas is cooled through an intercooler 202, the pressure of the EGR gas is increased through a compressor 203 to meet the requirement in a gas auxiliary injection system, pressure adjustment is carried out through a pressure gauge 204, and finally the compressed EGR gas (7bar) is conveyed to a gas inlet 303 in a gas auxiliary oil injector 3. Finally, by adopting the gas-assisted fuel injection technology, the fuel injection electromagnetic valve 305 is controlled by the ECU control system 4 and is responsible for opening 305 of the fuel injection nozzle, the fuel entering the gas-assisted fuel injector 3 is injected into the mixing cavity 307 through the fuel injection nozzle 305, at the moment, a large amount of compressed EGR gas exists in the mixing cavity and is fully mixed in the mixing cavity 307, the gas injection electromagnetic valve 308 controls the gas injection nozzle 301 to be opened through the ECU control system 4, and finally, the gas injection nozzle 301 injects the mixed gas into the combustion chamber of the engine.
The inherent physical properties of aviation kerosene make atomization thereof difficult, which is also an important reason for affecting economical efficiency. The fuel is sprayed into the mixing cavity in advance by adopting a gas-assisted spraying mode, the fuel is mixed with EGR gas, and then the fuel is crushed by utilizing the air nozzle, so that a better atomization effect is achieved. Meanwhile, EGR has obvious effects on reducing NOx emission of the engine, inhibiting knocking combustion of the engine and the like. Meanwhile, the introduced high-temperature waste gas can also promote the atomization quality of fuel injection.
In conclusion, the atomization quality of the aviation kerosene is improved through the gas-assisted fuel injection technology; secondly, the EGR technology is utilized to reduce the NOx emission of the engine and inhibit the detonation combustion of the engine, so that the compression ratio can be further improved, and the performance of the engine is improved; the injection time and the injection pulse width of the fuel nozzle and the air nozzle are flexibly adjusted through the ECU control system 4, the requirements of the engine under different working conditions are met, and in addition, the injection pressure and the exhaust gas pressure can be properly increased to further improve the atomization quality. Finally, the purposes of simple structure, good aviation kerosene atomization quality, effective knock suppression and engine performance improvement are achieved.
The present invention is not limited to the above-described embodiments. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many changes and modifications to the invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. An EGR gas-assisted aviation kerosene injection system comprises an EGR system, a gas-assisted fuel injector, an oil supply system and an ECU control system; the gas-assisted fuel injector comprises a fuel injection nozzle, a gas injection nozzle, a mixing cavity, a fuel injection electromagnetic valve, a gas injection electromagnetic valve and a gas inlet, and is characterized in that an EGR system is connected with the gas-assisted fuel injector through a gas path pipeline, the mixing cavity is communicated with the gas inlet, and compressed EGR gas processed by the EGR system is sent into the mixing cavity through the gas inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125387.5A CN112267959A (en) | 2020-10-20 | 2020-10-20 | EGR gas-assisted aviation kerosene injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125387.5A CN112267959A (en) | 2020-10-20 | 2020-10-20 | EGR gas-assisted aviation kerosene injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112267959A true CN112267959A (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011125387.5A Pending CN112267959A (en) | 2020-10-20 | 2020-10-20 | EGR gas-assisted aviation kerosene injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112267959A (en) |
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2020
- 2020-10-20 CN CN202011125387.5A patent/CN112267959A/en active Pending
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