CN217898006U - Combustion system and engine - Google Patents
Combustion system and engine Download PDFInfo
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- CN217898006U CN217898006U CN202221642526.6U CN202221642526U CN217898006U CN 217898006 U CN217898006 U CN 217898006U CN 202221642526 U CN202221642526 U CN 202221642526U CN 217898006 U CN217898006 U CN 217898006U
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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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a combustion system and engine, include: a body; a piston; a main combustion section; and a pre-combustion portion including: the first injector is arranged at the top of the pre-combustion part and is suitable for injecting fuel along the axial direction of the pre-combustion chamber; at least one second injector arranged on the side wall of the pre-combustion part and suitable for injecting fuel along the radial direction of the pre-combustion chamber so as to uniformly mix the fuel injected by the second injector and the fuel injected by the first injector; a spark plug adapted to ignite fuel within the pre-combustion chamber; the jet holes are arranged at one end of the precombustion part in the main combustion chamber and are suitable for jetting the fuel precombusted in the precombustion chamber to the main combustion chamber in the form of jet flame so as to ignite fuel bundles formed by the fuel in the main combustion chamber and enable the fuel bundles in the main combustion chamber to be combusted in a diffusion combustion mode; wherein the combustion system is suitable for methanol fuel, hydrogen, natural gas, ammonia gas and carbon neutral fuel.
Description
Technical Field
The utility model relates to an internal-combustion engine field, in particular to methanol spray rare diffusion's combustion system and engine based on active heat efflux is ignited.
Background
At present, energy conservation and emission reduction become breakthrough for optimizing an economic structure and promoting green cycle low-carbon development. As a major mobile power source in the transportation field, internal combustion engines are an important source of consumption prime power and CO2 emissions of non-renewable fossil fuels. The method reduces the consumption of fossil energy by an internal combustion engine and the emission of CO2 in the whole life cycle, and is an important means for protecting the environment, reducing the external dependence of petroleum, ensuring the energy safety and realizing sustainable development.
As a typical alternative fuel, the methanol production raw material is rich, and coal, natural gas, biomass, CO2 and the like can be used for preparing methanol. Aiming at the current situation of fossil resources with rich coal, less oil and gas, the preparation of methanol from coal is an important direction for realizing efficient and clean utilization of coal resources, reducing petroleum consumption and guaranteeing energy safety. On the other hand, the preparation of methanol by using biomass and wastes thereof can greatly reduce the carbon emission of the methanol in the whole life cycle, and the preparation of methanol by CO2 capture can completely realize carbon neutral circulation, thereby being an important strategic development direction for solving the problems of energy shortage and environmental constraint.
When the methanol is applied to the internal combustion engine, the characteristics of high latent heat of vaporization, high octane number, wide ignition limit, higher flame propagation speed and the like are all beneficial to improving the heat efficiency and emission of the engine, and the methanol is a renewable low-carbon fuel capable of realizing high-efficiency cleaning and carbon neutral operation of the internal combustion engine.
At present, the application mode of the methanol fuel on the internal combustion engine mainly uses ignition of premixed gas or dual fuel combustion, the premixed ignition type combustion efficiency is low, the low-load combustion stability is poor, the pre-ignition and detonation limit thermal efficiency is improved, and the phenomena of premixed combustion of unburned methanol, unconventional emission and the like exist. The dual-fuel mode still needs to burn diesel oil, so that the effect of reducing carbon emission is poor, and the structure of the engine is complicated by adopting two sets of fuel oil systems. In addition, because the fuel has lower activity and is not easy to ignite and burn, the compression self-ignition mode can cause the defects of poor combustion stability under the small-load working condition, even 'fire' and too rough work under the large-load working condition, and simultaneously, the compression ratio of the engine is overhigh, and the running stability and the reliability are poor.
SUMMERY OF THE UTILITY MODEL
For above-mentioned and other at least partial technical problem of aspect among the solution prior art, according to the utility model discloses an aspect's embodiment provides a combustion system and engine, sprays main combustion chamber with jet flow flame's form through the fuel of precombustion in the precombustion chamber, ignites the fuel in the main combustion chamber for fuel bundle in the main combustion chamber burns with the mode of diffusion combustion, can realize the effective regulation and control of the exothermic law of burning, is favorable to further increasing the thermal efficiency.
According to an embodiment of an aspect of the present invention, there is provided a combustion system, including:
a body;
the piston is arranged in the machine body, and a main combustion chamber is defined between the bottom of the piston and the machine body;
a main combustion portion disposed on the body and adapted to inject fuel into the main combustion chamber; and
a pre-combustion portion disposed on the housing, the pre-combustion portion defining a pre-combustion chamber therein, the pre-combustion portion including:
a first injector arranged at the top of the pre-combustion part and used for injecting fuel along the axial direction of the pre-combustion chamber;
at least one second injector arranged on the side wall of the pre-combustion part and suitable for injecting fuel along the radial direction of the pre-combustion chamber so as to uniformly mix the fuel injected by the second injector and the fuel injected by the first injector;
a spark plug adapted to ignite fuel within the pre-combustion chamber; and
the jet holes are arranged at one end of the pre-combustion part in the main combustion chamber and are suitable for jetting fuel pre-combusted in the pre-combustion chamber to the main combustion chamber in the form of jet flame so as to ignite fuel bundles formed by the fuel in the main combustion chamber and enable the fuel bundles in the main combustion chamber to be combusted in a diffusion combustion mode;
wherein the combustion system is suitable for methanol fuel, hydrogen, natural gas, ammonia gas and carbon neutral fuel.
In some embodiments of the present invention, wherein the pre-combustion portion is disposed at a top center of the machine body.
In some embodiments of the invention, wherein a direction of the first axis of the main combustion portion and a direction of the second axis of the pre-combustion portion form an included angle α, the included angle α comprising an acute angle.
In some embodiments of the present invention, wherein the main combustion portion includes a third injector, the third injector is located one end in the main combustion chamber is provided with a plurality of nozzle holes along a circumferential direction, so as to inject fuel into the main combustion chamber.
In some embodiments of the present invention, wherein an injection direction of the third injector close to the nozzle hole of the pre-combustion portion and an injection direction of the main combustion portion close to the jet hole form an included angle β, and the included angle β includes an obtuse angle.
In some embodiments of the present invention, wherein the inner space of the pre-combustion chamber comprises a first cylindrical portion and a second cylindrical portion communicating with the first cylindrical portion, which are sequentially arranged in the injection direction, wherein the inner diameter of the first cylindrical portion is larger than the inner diameter of the second cylindrical portion.
In some embodiments of the present invention, wherein the inner space of the pre-combustion chamber includes a reverse circular table portion and a third cylindrical portion communicating with one end of the reverse circular table portion having a smaller diameter, which are sequentially arranged in the injection direction.
In some embodiments of the present invention, the combustion system further comprises:
the air inlet channel is formed on the side surface of the top of the machine body; and
and the exhaust passage is formed on the other side surface of the top of the machine body, which is symmetrical to the air inlet passage.
In some embodiments of the present invention, an intake valve capable of opening and closing the intake passage is disposed in the intake passage; an exhaust valve capable of opening and closing the exhaust passage is arranged in the exhaust passage.
According to an aspect of the present invention, there is provided an engine, including:
as in the combustion system of any of the embodiments described above,
the control unit is electrically connected with the first injector, the second injector and the third injector and is suitable for controlling the fuel injection speed in the main combustion chamber and the pre-combustion chamber;
a monitoring unit adapted to monitor a load of the engine.
According to the utility model discloses combustion system and engine through setting up the precombustion chamber can make the fuel concentration layering in the precombustion chamber controllable, is favorable to forming the active heat efflux and sprays jet flame, and jet flame ignites the fuel burning of the dilution diffusion in the main combustion chamber and can solve the precombustion of fuel and the knockings of piston, improves combustion system's thermal efficiency.
Drawings
Fig. 1 schematically shows a cross-sectional view of a combustion system according to an embodiment of the invention in one direction;
fig. 2 schematically shows a cross-sectional view of a combustion system according to an embodiment of the invention in another direction;
FIG. 3 schematically illustrates a cross-sectional view of a pre-combustion section in accordance with an embodiment of the present invention;
fig. 4 schematically shows a cross-sectional view in one direction of a combustion system according to another embodiment of the invention;
fig. 5 schematically shows a cross-sectional view in another direction of a combustion system according to another embodiment of the invention;
FIG. 6 schematically illustrates a cross-sectional view of a pre-combustion section in accordance with another embodiment of the present invention; and
fig. 7 schematically illustrates a bottom view of the fuel injection effect of a combustion system according to an embodiment of the invention.
Description of the reference numerals
1-a spark plug;
2-a first ejector;
3-a pre-combustion chamber;
4-jet hole;
5-a second injector;
6-spraying a hole;
7-main combustion chamber;
8-a piston;
9-body;
10-a third ejector;
11-an air inlet channel;
12-an exhaust valve;
13-an exhaust passage;
14-intake valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
It should be understood that the description is illustrative only and is not intended to limit the scope of the present invention. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. Furthermore, in the following description, descriptions of well-known technologies are omitted so as to avoid unnecessarily obscuring the concepts of the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprises" and "comprising," when used herein, specify the presence of stated features, steps, or operations, but do not preclude the presence or addition of one or more other features.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
Fig. 1 schematically shows a cross-sectional view of a combustion system according to an embodiment of the invention in one direction; figure 3 schematically shows a cross-sectional view of a pre-combustion section according to an embodiment of the invention.
According to an embodiment of an aspect of the present invention, there is provided a combustion system, as shown in fig. 1 and 3, including: a body 9; a piston 8 disposed in the body 9, a main combustion chamber 7 being defined between a bottom of the piston 8 and the body 9; a main combustion unit provided in the machine body 9 and adapted to inject fuel into the main combustion chamber 7; and a pre-combustion portion provided on the body 9, the pre-combustion portion defining therein a pre-combustion chamber 3, the pre-combustion portion including: a first injector 2, arranged at the top of the pre-combustion section, adapted to inject fuel in the axial direction of the pre-combustion chamber 3; at least one second injector 5, arranged on the side wall of the pre-combustion part, adapted to inject fuel in the radial direction of the pre-combustion chamber 3, so as to mix the fuel injected by the second injector 5 and the first injector 2 uniformly; a spark plug 1 adapted to ignite the fuel in said pre-combustion chamber 3; and a plurality of jet holes 4, disposed at one end of the pre-combustion portion in the main combustion chamber 7, and adapted to inject the fuel pre-combusted in the pre-combustion chamber 3 into the main combustion chamber 7 in the form of jet flames, so as to ignite the fuel bundle formed by the fuel in the main combustion chamber 7, and enable the fuel bundle in the main combustion chamber 7 to be combusted in a diffusion combustion manner; wherein the combustion system is suitable for methanol fuel, hydrogen, natural gas, ammonia gas and carbon neutral fuel.
According to the utility model discloses combustion system, controllable concentration layering is realized to first sprayer 2 of fuel accessible and second sprayer 5 in the precombustion chamber, later by ignite spread to form jet flame or thermal activity efflux mixture behind the jet orifice 4, improve ignition energy, flame propagation is in order to ignite the fuel that third igniter spouts to main combustion chamber in with higher speed, can show improvement combustion stability, the low and high defect of harmful emission of the thermal efficiency that leads to such as the lean burn limit that dilute premixed gas faced in the main combustion chamber and detonation has been avoided simultaneously. In addition, the fuel is directly sprayed in the main combustion chamber to form mixed gas which mainly takes the lean diffusion combustion as the main part, so that the emission of NOx and soot can be effectively reduced, and the regulation and control means of the combustion heat release rule is improved.
In some embodiments of the present invention, the combustion system provides chemical energy by using methanol fuel, which is a new clean fuel prepared by mixing industrial methanol or fuel methanol plus denatured alcohol additive with the existing national standard gasoline and diesel oil (or component oil) according to a certain volume (or weight ratio) through a strict scientific process. The methanol fuel can replace gasoline and diesel oil and be used for various motor vehicles and cooking stoves. The raw materials for producing the methanol mainly comprise coal, natural gas, coal bed gas, coke oven gas and the like, and particularly, the high-sulfur inferior coal and the coke oven gas are used for producing the methanol, so that the comprehensive utilization of resources can be improved, and the environmental pollution can be reduced. The coal-based methanol fuel is developed to supplement and partially replace petroleum fuel, so that the energy shortage can be relieved, and the comprehensive utilization of resources can be improved.
Fig. 7 schematically illustrates a bottom view of the fuel injection effect of a combustion system according to an embodiment of the invention.
In some embodiments of the present invention, as shown in fig. 7, the pre-combustion part is disposed at the top center of the machine body 9. According to fig. 1, the direction of the first axis y of the main combustion part forms an angle a with the direction of the second axis x of the pre-combustion part, said angle a comprising an acute angle. The main combustion part comprises a third injector 10, and one end of the third injector 10, which is located in the main combustion chamber 7, is provided with a plurality of nozzle holes 6 along the circumferential direction, so as to inject fuel into the main combustion chamber 7. The injection direction y 'of the injection holes 6 of the third injector 10 close to the pre-combustion portion makes an angle beta with the injection direction x' of the injection holes 4 of the pre-combustion portion close to the main combustion portion, said angle beta comprising an obtuse angle, such as 120-160 degrees, preferably 120 degrees, 130 degrees, 140 degrees, 150 degrees, or 160 degrees. The main combustion portion can make jet flame and fuel spray towards similar direction with the precombustion portion acutangular angle, the fuel that third sprayer 10 sprays becomes obtuse angle with the jet flame that jet orifice 4 sprays and intersects the area of contact that can increase jet flame and fuel, the ignition fuel that can be more convenient, through the jet fuel proportion of adjusting the first sprayer 2 of precombustion chamber 3 and the third sprayer of second sprayer 5 and main combustion chamber, can realize the effective regulation and control of combustion process and exothermic law in the main combustion chamber, better realization the carbon neutralization in the internal-combustion engine use.
In some embodiments of the present invention, the angle α is between 30 ° and 80 °, for example, 30 degrees, 40 degrees, 50 degrees, 60 degrees, or 80 degrees, and the pilot of the active jet flame to dilute diffusion of methanol spray in the main combustion chamber can be better realized by adjusting the angle α between the main combustion portion and the pre-combustion portion to determine the jet hole 3 and the jet hole 6 injection angle β.
In some embodiments of the present invention, the third injector 10 of the main combustion portion injects the fuel into the cylinder to form a vortex in the cylinder to drive the air flow through the percussion piston 8, thereby promoting the mixing of the fuel and the air.
In some embodiments of the present invention, the third injector 10 is a high-pressure injector, and the number of the nozzle holes 6 is 6, and the low end of the third injector 10 is uniformly distributed along the circumferential direction, and the high-pressure injection through the nozzle holes 6 can make the fuel spray have a certain penetration distance, so that the main combustion chamber is directly injected with methanol to form a mixture mainly with the dilute diffusion combustion.
In some embodiments of the present invention, the spark plugs 1 are 4 types, which are a general spark plug, a single platinum spark plug, an iridium spark plug, and a double iridium spark plug, respectively. The spark plug discharges the pulse high voltage sent by the high voltage lead to break down the air between the two electrodes of the spark plug, and generates electric sparks to ignite the mixed gas in the main combustion chamber 7. The spark plug cooperates with the ignition system and the oil supply system to cause the engine to do work.
In some embodiments of the present invention, the piston 8 comprises: gravity cast pistons, squeeze cast pistons, and forged pistons. The top of the piston 8 can adopt a flat top or a concave top, so that the structure of the combustion chamber is compact, and the top of the piston 8 is also provided with a piston ring, so that high-temperature and high-pressure gas can be prevented from entering a crankcase, and engine oil can be prevented from entering the combustion chamber. Most of the heat absorbed at the top of the piston is also transferred through the piston to the cylinder and then away through the cooling medium.
In some embodiments of the present invention, the material of the piston 8 includes: aluminum alloys, cast iron, steel. The working instantaneous temperature of the piston can reach more than 2500, and the working pressure is 3-9 MPa.
In some embodiments of the present invention, wherein the inner space of the pre-combustion chamber 3 comprises a first cylindrical portion and a second cylindrical portion communicating with the first cylindrical portion, which are arranged in sequence in the injection direction, wherein the inner diameter of the first cylindrical portion is larger than the inner diameter of the second cylindrical portion. The fuel injected from the first injector 3 and the second injector 5 is concentrated in the second cylindrical portion after the first cylindrical portion is ignited, and then forms jet flame injection through the jet holes 4 toward the main combustion chamber 7 to ignite the fuel in the main combustion chamber. The flame in the precombustion chamber 3 can be better guided to the jet hole 4 by arranging the second combustion part.
Fig. 4 schematically shows a cross-sectional view in one direction of a combustion system according to another embodiment of the invention; fig. 5 schematically shows a cross-sectional view in another direction of a combustion system according to another embodiment of the invention; figure 6 schematically shows a cross-sectional view of a pre-combustion section according to another embodiment of the invention.
In some embodiments of the present invention, as shown in fig. 4, 5, and 6, the inner space of the pre-combustion chamber 3 includes a reverse truncated cone portion and a third cylinder portion, which are sequentially arranged in the injection direction, and communicate with the end of the reverse truncated cone portion with the smaller diameter. The pre-combustion chamber with the inverted circular truncated cone shape can enable the fuels of the first injector 3 and the second injector 5 to be fully mixed, so that the concentration of the fuels in the pre-combustion chamber is improved, and the ignition of the fuels in the pre-combustion chamber by the spark plug 1 is facilitated.
Fig. 2 schematically shows a cross-sectional view of a combustion system according to an embodiment of the invention in another direction.
In some embodiments of the present invention, the combustion system is as shown in fig. 2, further comprising: the air inlet channel 11 is formed on the top side surface of the machine body 9; and an exhaust passage 13 formed on the other side surface of the top of the body 9 symmetrical to the intake passage 11. An inlet valve 14 capable of opening and closing the inlet channel 11 is arranged in the inlet channel 11; an exhaust valve 12 capable of opening and closing the exhaust passage 13 is arranged in the exhaust passage 13. The intake port 11 intake and exhaust port 13 exhaust are controlled by adjusting the opening and closing of the intake valve 14 and the exhaust valve 12.
In some embodiments of the present invention, the combustion system has a workflow that is: when the piston 8 descends from the top dead center, the intake valve 14 is in an open state, the exhaust valve 12 is in a closed state, and air enters the main combustion chamber 7 and the pre-combustion chamber 3 from the intake passage 11; when piston 8 crosses bottom dead center, intake valve 14 starts to close, piston moves upward to compress air in cylinder, temperature and pressure in main combustion chamber 7 continuously rise, and at the same time, first injector 2 and second injector 5 in the pre-combustion part inject a small amount of methanol fuel into pre-combustion chamber 3, and the injected methanol mixes with air in pre-combustion chamber 3 to form premixed gas; then the premixed methanol fuel is ignited by the spark plug 1, the temperature and the pressure are increased rapidly due to the heat release of the methanol combustion, so that the pressure difference between the precombustion chamber 3 and the main combustion chamber 7 is increased gradually, the ignited premixed methanol flame propagates in the precombustion chamber 3, and due to the pressure difference, the premixed methanol flame forms a plurality of jet flames through the jet holes 4 to improve the ignition energy and accelerate the propagation of the flame to ignite the methanol spray in the main combustion chamber 7. The active heat jet flow of the pre-combustion chamber 3 enters the main combustion chamber 7, meanwhile, a large amount of methanol fuel is sprayed into the main combustion chamber 7 by the third injector 10, the turbulent flow generated by the jet flow increases the propagation speed of flame, so that hot gas is distributed in a wide area of the main combustion chamber 7, and dispersed ignition is generated in the whole combustion chamber through which the jet flow passes; after the combustible methanol mixed gas at the spraying end of the main combustion chamber 7 is ignited, diffusion combustion flame is formed, the methanol is combusted to release heat, and the piston 8 is pushed to move downwards to output mechanical work; when the piston moves to a position close to the bottom dead center, the exhaust valve 12 is opened, the piston moves upwards to remove waste gas in the cylinder, and the whole working process is completed.
According to an aspect of the present invention, there is provided an engine, including: in the combustion system according to any of the above embodiments, the control unit, electrically connected to the first injector 2, the second injector 5, and the third injector 10, is adapted to control the fuel injection speed in the main combustion chamber 7 and the pre-combustion chamber 3; a monitoring unit adapted to monitor a load of the engine.
In some embodiments of the present invention, an Engine Control Unit (ECU) is the core of an engine control system, and can provide the mixture with the best air-fuel ratio and the best ignition time to the engine according to different working conditions of the engine, so that the engine is always in the best working state, and the performance of the engine reaches the best. It is similar to common computer and consists of Microprocessor (MCU), memory (ROM, RAM), I/O interface, A/D converter, shaping and driving IC.
The utility model discloses an in some embodiments, the monitoring unit can monitor, control the operational aspect of engine, shows engine operating parameter. The device comprises a rotating speed meter, an engine oil pressure meter, a water temperature meter, an oil level meter, an engine starting switch, an emergency brake and the like. The monitoring unit comprises a starting device and a stopping device of the engine, pressure and temperature sensors and a crankshaft rotating speed sensor and instrument for automatically detecting an internal lubricating system and a cooling system of the engine, an overspeed distinguishing alarm system and a low oil pressure and high water temperature alarm system, so that the engine can normally work under the tight monitoring control of the instrument. The monitoring unit is provided with a shutdown button.
So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. In addition, the above definitions of the components are not limited to the specific structures, shapes or manners mentioned in the embodiments, and those skilled in the art may easily modify or replace them.
It should also be noted that, unless otherwise indicated, the numerical parameters set forth in the specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by the teachings of the present invention. In particular, all numbers expressing dimensions, range conditions, and so forth, used in the specification and claims are to be understood as being modified in all instances by the term "about". Generally, the expression is meant to encompass variations of ± 10% in some embodiments, 5% in some embodiments, 1% in some embodiments, 0.5% in some embodiments by the specified amount.
It will be appreciated by a person skilled in the art that various combinations and/or combinations of features described in the various embodiments and/or the claims of the present invention are possible, even if such combinations or combinations are not explicitly described in the present invention. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present invention may be made without departing from the spirit and teachings of the invention. All such combinations and/or associations fall within the scope of the present invention.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A combustion system, comprising:
a body;
the piston is arranged in the machine body, and a main combustion chamber is defined between the bottom of the piston and the machine body;
a main combustion part arranged on the machine body and suitable for injecting fuel to the main combustion chamber; and
a pre-combustion portion disposed on the housing, the pre-combustion portion defining a pre-combustion chamber therein, the pre-combustion portion including:
a first injector arranged at the top of the pre-combustion part and adapted to inject fuel in the axial direction of the pre-combustion chamber;
at least one second injector arranged on the side wall of the pre-combustion part and suitable for injecting fuel along the radial direction of the pre-combustion chamber so as to uniformly mix the fuel injected by the second injector and the fuel injected by the first injector;
a spark plug adapted to ignite fuel within the pre-combustion chamber; and
the jet holes are arranged at one end of the pre-combustion part in the main combustion chamber and are suitable for jetting fuel pre-combusted in the pre-combustion chamber to the main combustion chamber in the form of jet flame so as to ignite fuel bundles formed by the fuel in the main combustion chamber and enable the fuel bundles in the main combustion chamber to be combusted in a diffusion combustion mode;
wherein the combustion system is suitable for methanol fuel, hydrogen, natural gas, ammonia gas and carbon neutral fuel.
2. The combustion system of claim 1, wherein the pre-combustion portion is disposed at a top center of the body.
3. A combustion system according to claim 1 or 2, wherein the direction of the first axis of the main combustion portion makes an angle (α) with the direction of the second axis of the pre-combustion portion, said angle (α) comprising an acute angle.
4. The combustion system of claim 3 wherein said main combustion portion includes a third injector having a plurality of circumferentially oriented jet holes at an end of said third injector located within said main combustion chamber for injecting fuel into said main combustion chamber.
5. A combustion system according to claim 4, wherein the injection direction of the injection hole of the third injector (10) close to the pre-combustion portion is at an angle (β) to the injection direction of the injection hole of the pre-combustion portion close to the main combustion portion, the angle (β) comprising an obtuse angle.
6. The combustion system of claim 1, wherein the inner space of the pre-combustion chamber comprises a first cylindrical portion and a second cylindrical portion communicating with the first cylindrical portion arranged in sequence in the injection direction, wherein the inner diameter of the first cylindrical portion is larger than the inner diameter of the second cylindrical portion.
7. The combustion system of claim 1, wherein the inner space of the pre-combustion chamber comprises a truncated cone portion and a third cylindrical portion communicating with the end of the truncated cone portion having the smaller diameter, which are arranged in order in the injection direction.
8. The combustion system of claim 1, further comprising:
the air inlet channel is formed on the side surface of the top of the machine body; and
and the exhaust passage is formed on the other side surface of the top of the machine body, which is symmetrical to the air inlet passage.
9. The combustion system of claim 8, wherein an intake valve is disposed in the intake passage to open and close the intake passage; an exhaust valve capable of opening and closing the exhaust passage is arranged in the exhaust passage.
10. An engine, comprising:
the combustion system of any one of claims 1 to 9,
the control unit is electrically connected with the first injector, the second injector and the third injector and is suitable for controlling the fuel injection speed in the main combustion chamber and the pre-combustion chamber;
a monitoring unit adapted to monitor a load of the engine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221642526.6U CN217898006U (en) | 2022-06-28 | 2022-06-28 | Combustion system and engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221642526.6U CN217898006U (en) | 2022-06-28 | 2022-06-28 | Combustion system and engine |
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| CN217898006U true CN217898006U (en) | 2022-11-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608071A (en) * | 2023-05-23 | 2023-08-18 | 江苏大学 | Jet ignition type methanol engine combustion system |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608071A (en) * | 2023-05-23 | 2023-08-18 | 江苏大学 | Jet ignition type methanol engine combustion system |
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