CN111794888A - Dual-fuel internal combustion engine partition combustion structure - Google Patents

Dual-fuel internal combustion engine partition combustion structure Download PDF

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Publication number
CN111794888A
CN111794888A CN202010594661.7A CN202010594661A CN111794888A CN 111794888 A CN111794888 A CN 111794888A CN 202010594661 A CN202010594661 A CN 202010594661A CN 111794888 A CN111794888 A CN 111794888A
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China
Prior art keywords
valve
combustion
oil
air
internal combustion
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CN202010594661.7A
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Chinese (zh)
Inventor
张建明
姬广存
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Yingjia Power Technology Wuxi Co ltd
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Yingjia Power Technology Wuxi Co ltd
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Priority to CN202010594661.7A priority Critical patent/CN111794888A/en
Publication of CN111794888A publication Critical patent/CN111794888A/en
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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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/04—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being subdivided into two or more chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • Y02T10/12—Improving ICE efficiencies
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention discloses a dual-fuel internal combustion engine zoned combustion structure, which comprises an injector and a combustion chamber, wherein the injector is arranged at the upper part of the combustion chamber, the lower end of the injector is provided with a nozzle component arranged at the top end in the combustion chamber, the nozzle component mainly comprises a needle valve, an air valve and a valve body, the needle valve is arranged in the air valve, a diesel inlet channel and a diesel pressure chamber are arranged between the needle valve and the air valve, and a natural gas inlet channel and a natural gas pressure chamber are arranged between the valve body and the air valve. The invention relates to a combustion mode of an internal combustion engine, in particular to a partitioned combustion structure of a dual-fuel internal combustion engine, and belongs to the technical field of internal combustion engines. The invention ensures the normal ignition and combustion of the dual-fuel internal combustion engine, and is convenient for combustion control; the invention simplifies the structural design of the nozzle part, optimizes the processing technology, reduces the processing difficulty of parts, improves the product percent of pass and reduces the production cost; the zone combustion method in the invention enables the ejector to be designed compactly as a whole and optimizes the product structure.

Description

Dual-fuel internal combustion engine partition combustion structure
Technical Field
The invention relates to a combustion mode of an internal combustion engine, in particular to a partitioned combustion structure of a dual-fuel internal combustion engine, and belongs to the technical field of internal combustion engines.
Background
With the gradual upgrade of emission standards, the traditional internal combustion engine using gasoline and diesel oil as combustion media is more and more difficult to meet the requirements of future combustion technologies. Along with the adjustment of national energy structures, available internal combustion engine fuels are gradually diversified, and the available internal combustion engine fuels comprise a plurality of clean fuels such as natural gas, liquefied petroleum gas, methanol and the like. The diesel-fueled internal combustion engine burns diesel oil by compression ignition, has the advantages of high compression ratio, high thermal efficiency, high torque output and the like, and clean fuels such as natural gas, liquefied petroleum gas, methanol and the like are not easy to be subjected to compression ignition. In order to fully exert the advantages of diesel and clean fuel, a plurality of dual-fuel direct injection technologies are developed, namely, a certain amount of diesel is firstly injected into a combustion chamber of an internal combustion engine, then the clean fuel is injected into the combustion chamber, the diesel can self-ignite after being injected into the combustion chamber to form a self-ignition area, and the injected fuel can be ignited if being injected into the self-ignition area, so that the combustion work of the internal combustion engine is realized.
The quantity of the diesel oil sprayed into the combustion chamber is small, and the diesel oil is mainly used for igniting, but the vortex intensity in the combustion chamber of the internal combustion engine is different, the relative angles of the diesel oil spray holes and the clean fuel spray holes are different, and the spontaneous combustion area is changed. In the current dual-fuel internal combustion engine technology, the adopted technical method is to fix the relative angle of the diesel oil spray hole and the clean fuel spray hole, so that the diesel oil spray hole and the clean fuel spray hole are not on the same spray track, and the compression ignition diesel oil is prevented from being blown out. However, the overall structural design of the internal combustion engine is very compact, the space for installing the injector is very small, the structural design for fixing the diesel injection hole and cleaning the fuel injection hole can lead the wall thickness of the injector nozzle to be thinner, the parts are difficult to process, the working reliability is poor, the overall size of the injector is larger, the reasonable and compact design cannot be carried out, and certain difficulty is caused in the installation of the internal combustion engine.
In order to avoid the phenomenon that compression ignition diesel is blown out, reduce the design and processing difficulty of parts and reasonably and compactly design an injector structure, a partition combustion method of a dual-fuel internal combustion engine is needed to solve the problem.
Disclosure of Invention
The invention aims to provide a zoning combustion structure of a dual-fuel internal combustion engine, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a dual-fuel internal-combustion engine subregion combustion structure, includes sprayer and combustion chamber, the sprayer is installed on combustion chamber upper portion, the sprayer lower extreme is equipped with the nozzle part of arranging the inside top of combustion chamber in, nozzle part mainly comprises needle valve, pneumatic valve and valve body, the needle valve is arranged in the pneumatic valve, just be equipped with diesel oil inlet channel and diesel oil pressure chamber between needle valve and the pneumatic valve, the needle valve lower extreme is arranged in to the diesel oil pressure chamber, be equipped with the needle valve seal face of arranging diesel oil inlet channel lower extreme in between needle valve and the pneumatic valve, the pneumatic valve is arranged in the valve body, just be equipped with natural gas inlet channel between pneumatic valve and the valve body, be equipped with the pneumatic valve seal face of arranging natural gas inlet channel lower extreme in between pneumatic valve and the valve body, the activity is pegged graft end department under, the lower end of the air valve is provided with a plurality of oil injection holes communicated with the diesel pressure chamber, and the lower end of the valve body is provided with a plurality of gas injection holes communicated with the natural gas pressure chamber.
As a preferred technical solution of the present invention, the fuel injection holes inject fuel jets, a greatest common divisor exists between the total number of the fuel injection holes and the total number of the fuel injection holes, the combustion chamber is divided into combustion zones of corresponding numbers according to the greatest common divisor, in each combustion zone, the fuel jets and the fuel jets have the same number, and the total number of the fuel jets cannot be divided by an integer.
In a preferred embodiment of the present invention, the gas jet injection area does not completely cover the oil jet injection area, and the oil jet can be spontaneously ignited in the combustion chamber.
As a preferable technical scheme of the invention, the gas injection holes and the oil injection holes are arranged at a certain angle with the center of the nozzle component and are respectively distributed at the positions of the valve body and the head part of the valve in an annular shape.
Compared with the prior art, the invention has the beneficial effects that:
the invention ensures the normal ignition and combustion of the dual-fuel internal combustion engine, and is convenient for combustion control;
the invention simplifies the structural design of the nozzle part, optimizes the processing technology, reduces the processing difficulty of parts, improves the product percent of pass and reduces the production cost;
the zone combustion method in the invention enables the ejector to be designed compactly as a whole and optimizes the product structure.
Drawings
FIG. 1 is a schematic structural view of a nozzle member;
FIG. 2 is a schematic illustration of a zone distribution of a zone by zone combustion process;
FIG. 3 is a schematic diagram of the zone distribution of a zone two combustion method;
FIG. 4 is a schematic view of a three zone profile for a zone combustion process;
FIG. 5 is a schematic diagram of a four zone distribution of a zone combustion process;
FIG. 6 is a schematic diagram of a five zone distribution of a zone combustion process;
FIG. 7 is a schematic diagram of a six-zone distribution of a zone-by-zone combustion method;
FIG. 8 is a schematic diagram of a seven zone distribution of a zone combustion process;
FIG. 9 is a schematic diagram of eight zones of a zone combustion method;
FIG. 10 is a schematic diagram of a nine-zone distribution in a zone combustion process.
In the figure: 01. the fuel injection valve comprises a needle valve body, 02, a gas valve, 03, a valve body, 04, a natural gas inlet channel, 05, a diesel oil inlet channel, 06, a gas valve sealing surface, 07, a needle valve sealing surface, 08, a natural gas pressure chamber, 09, a gas injection hole, 10, a diesel oil pressure chamber, 11, an oil injection hole, 12, a nozzle component, 13, a gas beam, 14, an oil beam, 15 and a combustion chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the drawings in the figures 1-10,
in the invention, the pilot fuel of the dual-fuel internal combustion engine is diesel oil, and the clean fuel for main combustion can be various types of fuel such as natural gas, liquefied petroleum gas, methane gas, ethane gas, methanol and the like, which is convenient for expression, and the clean fuel in the following is expressed by taking natural gas as a representative.
The invention provides a dual-fuel internal combustion engine zoned combustion structure, comprising an injector and a combustion chamber 15, wherein the injector is arranged at the upper part of the combustion chamber 15, the lower end of the injector is provided with a nozzle component 12 arranged at the top end inside the combustion chamber 15, the nozzle component 12 mainly comprises a needle valve 01, an air valve 02 and a valve body 03, the needle valve 01 is arranged in the air valve 02, a diesel inlet channel 05 and a diesel pressure chamber 10 are arranged between the needle valve 01 and the air valve 02, the diesel pressure chamber 10 is arranged at the lower end of the needle valve 01, a needle valve sealing surface 07 arranged at the lower end of the diesel inlet channel 05 is arranged between the needle valve 01 and the air valve 02, the air valve 02 is arranged in the valve body 03, a natural gas inlet channel 04 is arranged between the air valve 02 and the valve body 03, an air valve sealing surface 06 arranged at the lower end of the natural, the lower end of the air valve 02 is movably inserted at the lower end of the valve body 03, a plurality of oil spraying holes 11 communicated with the diesel pressure chamber 10 are formed in the lower end of the air valve 02, a plurality of air spraying holes 09 communicated with the natural gas pressure chamber 08 are formed in the lower end of the valve body 03, the air spraying holes 09 and the oil spraying holes 11 are obliquely arranged and are respectively distributed at the ends of the valve body 03 and the air valve 02 in an annular mode, and the air spraying holes 09 are arranged above the oil spraying holes 11.
The fuel oil burner is characterized in that the gas jet holes 09 jet the gas beams 13, the fuel oil jet holes 11 jet the oil beams 14, a maximum common divisor exists between the total number of the fuel oil jet holes 11 and the total number of the fuel oil jet holes 09, the combustion chamber 15 is divided into combustion areas with corresponding numbers according to the maximum common divisor, the gas beams 13 and the oil beams 14 in each combustion area have the same number, the total number of the gas beams 13 and the total number of the oil beams 14 cannot be divided, the injection area of the gas beams 13 cannot completely cover the injection area of the oil beams 14, and the oil beams 14 can be spontaneously combusted in the combustion chamber 15.
When the injector control needle valve 01 moves upwards, when the needle valve 01 is separated from a needle valve sealing surface 07, the needle valve 01 is opened, a diesel oil inlet channel 05 is communicated with a diesel oil pressure chamber 10, diesel oil is sprayed to a combustion chamber 15 through an oil spraying hole 11 to form an oil beam 14 when being sprayed, the injector control air valve 02 moves upwards, when the air valve 02 is separated from an air valve sealing surface 06, the air valve 02 is opened, a natural gas inlet channel 04 is communicated with a natural gas pressure chamber 08, natural gas is sprayed to the combustion chamber 15 through an air spraying hole 09 to form an air beam 13 when being sprayed.
When the needle valve 01 is opened, the oil bundle 14 injected into the combustion chamber 15 is gasified and spontaneously combusted in the combustion chamber 15 to form an autoignition region, then the air valve 02 is opened, the air bundle 13 injected into the combustion chamber 15 starts to combust under the ignition of the oil bundle 14 in the autoignition region, so that the combustion work of the engine is realized, the fuel proportion of the oil bundle 14 injected into the combustion chamber 15 is small, the fuel proportion of the air bundle 13 injected into the combustion chamber 15 is large, when the air bundle 13 is injected into the combustion chamber 15 from an injector, the air pressure is changed from a high-pressure state to a low-pressure state to absorb heat, and if the area of the air bundle 13 covers most or even all of the area of the oil bundle 14, the temperature of the autoignition region of the oil bundle 14 is reduced by the heat absorption of the gas expansion, so that the oil bundle 14 and the air bundle 13 can not reach; in the invention, a zoned combustion method is adopted, namely, the greatest common divisor exists between the number of the oil injection holes 11 and the number of the air injection holes 09, the combustion chamber 15 is divided into combustion zones with corresponding numbers according to the greatest common divisor value, each combustion zone has the same number of oil bundles 14 and the same number of air bundles 13, the total number of the oil bundles 14 and the total number of the air bundles 13 cannot be divided, a fixed angle does not need to be formed between the needle valve 01 and the air valve 02 in the nozzle part 12 of the injector, and the area of the air bundles 13 cannot completely cover the area of the oil bundles 14 by the design of the number of the oil injection holes 11 and the number of the air injection holes 09, so that the diesel can be ensured to be ignited normally and spontaneously, the combustion of the whole fuel is ignited, and the engine can.
Embodiments of different partitions will be described below:
in the first embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 1, the combustion chamber 15 is divided into one region, the first divisional combustion method is shown in fig. 2, in the schematic diagram, the number of the oil spray holes 11 is 9, the number of the air spray holes 09 is 13, in each positional relationship between the needle valve 01 and the gas valve 02, the spontaneous combustion and the ignition of the corresponding oil bundle 14 region can be realized, and the first divisional combustion method further comprises a combination form in which the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 1.
In the second embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 2, the combustion chamber 15 is divided into two zones, the second zone combustion method is shown in fig. 3, in the schematic diagram, the number of the oil spray holes 11 is 10, the number of the air spray holes 09 is 14, the number of the oil spray holes 11 in each zone is 5, and the number of the air spray holes 09 is 7, in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding area of the oil spray 14 can be realized, and the second zone combustion method further includes a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 2.
In the third embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 3, the combustion chamber 15 is divided into three zones, the three zones in the zoned combustion method are shown in fig. 4, in the schematic view, the number of the oil spray holes 11 is 9, the number of the air spray holes 09 is 12, the number of the oil spray holes 11 in each zone is 3, and the number of the air spray holes 09 is 4, so that spontaneous combustion and ignition in the corresponding oil bundle 14 zone can be realized in each positional relationship between the needle valve 01 and the air valve 02, and the three-zone combustion method further comprises a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray.
In the fourth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 4, the combustion chamber 15 is divided into four zones, the partition combustion method is shown in fig. 5, in the schematic diagram, the number of the oil spray holes 11 is 8, the number of the air spray holes 09 is 12, the number of the oil spray holes 11 in each partition is 2, and the number of the air spray holes 09 is 3, in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the four-zone combustion method further includes a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 being 4.
In the fifth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 5, the combustion chamber 15 is divided into five zones, fig. 6 is shown in the fifth distribution of the zoned combustion method, in the schematic view, the number of the oil spray holes 11 is 10, the number of the air spray holes 09 is 15, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, and in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the five-zone combustion method further includes a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 being.
In the sixth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 6, the combustion chamber 15 is divided into six zones, fig. 7 is shown in the sixth division of the zoned combustion method, in the schematic view, the number of the oil spray holes 11 is 12, the number of the air spray holes 09 is 18, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, and in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the six-zone combustion method further includes other combinations of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 6.
In the seventh embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 7, the combustion chamber 15 is divided into seven zones, the seventh zone combustion method is shown in fig. 8, in the schematic diagram, the number of the oil spray holes 11 is 14, the number of the air spray holes 09 is 21, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, in each positional relationship between the needle valve 01 and the gas valve 02, the spontaneous combustion and the ignition in the corresponding area of the oil spray 14 can be realized, and the seventh zone combustion method further comprises other combination forms that the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 7.
In the eighth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 8, the combustion chamber 15 is divided into eight regions, fig. 9 is shown in the eighth division of the zoned combustion method, in the schematic view, the number of the oil spray holes 11 is 16, the number of the air spray holes 09 is 24, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, and in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the eight region combustion method further includes other combinations of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 8.
In the ninth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 9, the combustion chamber 15 is divided into nine zones, and the ninth zone combustion method is shown in fig. 8, in which the number of the oil spray holes 11 is 18, the number of the air spray holes 09 is 27, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, so that the spontaneous combustion and the ignition in the corresponding oil bundle 14 zone can be realized in each positional relationship between the needle valve 01 and the gas valve 02, and the nine zone combustion method further includes other combination forms in which the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 9.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The utility model provides a dual-fuel internal combustion engine subregion combustion structure, includes sprayer and combustion chamber (15), its characterized in that, the sprayer is installed on combustion chamber (15) upper portion, the sprayer lower extreme is equipped with nozzle part (12) of arranging combustion chamber (15) inside top in, nozzle part (12) mainly comprise needle valve (01), pneumatic valve (02) and valve body (03), in pneumatic valve (02) were arranged in needle valve (01), just be equipped with diesel oil inlet passage (05) and diesel oil pressure chamber (10) between needle valve (01) and pneumatic valve (02), needle valve (01) lower extreme is arranged in diesel oil pressure chamber (10), be equipped with between needle valve (01) and pneumatic valve (02) and arrange diesel oil inlet passage (05) lower extreme needle valve sealing face (07), in valve body (03) is arranged in pneumatic valve (02), just be equipped with natural gas inlet passage (04) between pneumatic valve (02) and valve body (03), an air valve sealing surface (06) arranged at the lower end of a natural gas inlet channel (04) is arranged between the air valve (02) and the valve body (03), a natural gas pressure chamber (08) arranged at the lower end of the air valve sealing surface (6) is arranged between the air valve (02) and the valve body (03), the lower end of the air valve (02) is movably inserted at the lower end of the valve body (03) from top to bottom, a plurality of oil injection holes (11) communicated with the diesel pressure chamber (10) are formed in the lower end of the air valve (02), and a plurality of air injection holes (09) communicated with the natural gas pressure chamber (08) are formed in the lower end of the valve body (03).
2. The split-combustion structure of a dual-fuel internal combustion engine according to claim 1, characterized in that: the gas jet holes (09) jet gas beams (13), the oil jet holes (11) jet oil beams (14), a greatest common divisor exists between the total number of the oil jet holes (11) and the total number of the gas jet holes (09), the combustion chamber (15) is divided into a corresponding number of combustion zones according to the greatest common divisor, the gas beams (13) and the oil beams (14) have the same number in each combustion zone, and the total number of the gas beams (13) and the total number of the oil beams (14) cannot be divided in an integer mode.
3. The split-combustion structure of a dual-fuel internal combustion engine according to claim 2, characterized in that: the jet area of the gas beam (13) can not completely cover the jet area of the oil beam (14), and the oil beam (14) can be subjected to self-ignition in the combustion chamber (15).
4. The split-combustion structure of a dual-fuel internal combustion engine according to claim 1, characterized in that: the air injection holes (09) and the oil injection holes (11) are arranged at a certain angle with the center of the nozzle component (12) and are respectively distributed at the head positions of the valve body (03) and the air valve (02) in an annular manner.
CN202010594661.7A 2020-06-28 2020-06-28 Dual-fuel internal combustion engine partition combustion structure Pending CN111794888A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114447371A (en) * 2020-11-05 2022-05-06 英嘉动力科技无锡有限公司 Hydrogen injector and hydrogen nozzle structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114447371A (en) * 2020-11-05 2022-05-06 英嘉动力科技无锡有限公司 Hydrogen injector and hydrogen nozzle structure

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