CN109184898A - A kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type highly effective combustion system - Google Patents
A kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type highly effective combustion system Download PDFInfo
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- CN109184898A CN109184898A CN201811156396.3A CN201811156396A CN109184898A CN 109184898 A CN109184898 A CN 109184898A CN 201811156396 A CN201811156396 A CN 201811156396A CN 109184898 A CN109184898 A CN 109184898A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 82
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000003345 natural gas Substances 0.000 title claims abstract description 33
- 239000007921 spray Substances 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 241001416181 Axis axis Species 0.000 claims description 17
- 239000000567 combustion gas Substances 0.000 claims description 15
- 239000002737 fuel gas Substances 0.000 abstract description 15
- 239000000446 fuel Substances 0.000 description 10
- 239000008246 gaseous mixture Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
Classifications
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- 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
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/02—Engines characterised by means for increasing operating efficiency
- F02B43/04—Engines characterised by means for increasing operating efficiency for improving efficiency of combustion
-
- 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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
- F02B19/1004—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder details of combustion chamber, e.g. mounting arrangements
-
- 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
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
-
- 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
- F02M21/0278—Port fuel injectors for single or multipoint injection into the air intake system
-
- 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
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
- F02B2043/103—Natural gas, e.g. methane or LNG used as a fuel
-
- 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
Landscapes
- 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)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The purpose of the present invention is to provide a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type highly effective combustion systems, including cylinder cap, cylinder jacket, piston, air intake duct, exhaust duct, piston is located in cylinder jacket, it is combustion chamber between top land and cylinder cap, inlet valve is set in air intake duct, exhaust valve is set in exhaust duct, natural air feed system is set in air intake duct, the position of natural air feed system is located at before inlet valve, precombustion chamber is set in cylinder head, spark plug and precombustion chamber gas spraying injection device are respectively set in precombustion chamber, the part that precombustion chamber stretches in combustion chamber is provided with spray orifice.The present invention forms multiple incendiary sources and the compact structure of main combustion chamber using the high-temperature high-pressure fuel gas that porous channel sprays, and shortens Flame of Natural Gas propagation distance, realizes lean mixture multizone pilot combustion in cylinder.Meanwhile the jet-flow of high temperature and pressure destroys the vortex of the large scale in cylinder, the turbulence intensity in cylinder is improved, so that efficiency of combustion significantly improves.
Description
Technical field
The present invention relates to a kind of engines, specifically fire chamber of natural gas engine.
Background technique
Natural gas is a kind of resourceful clean energy resource, has the features such as calorific value is high, and anti-knock properties are good, has developed into
For the alternative fuel of oil and gasoline.In order to meet increasingly strict emission regulation, natural gas engine generally uses thin combustion
Burning technology, so that a part of heat generated in combustion process is absorbed by air, reduces temperature in cylinder using biggish air-fuel ratio
Degree, effectively reduces DS NOx Est, while can be to avoid deflagration phenomenon.
Marine large-diameter natural gas engine, since cylinder bore is big, burning chamber volume is larger, and Flame of Natural Gas
Propagation rate is slow, so that the engine in-cylinder combustion speed using lean combustion mode is slower, combustion duration is longer, heat transfer damage
It loses greatly, if gaseous mixture is excessive rarefied, it may appear that flame quenching and phenomenon of catching fire, so that unburned HC discharge significantly rises, fuel
Economy decline.
Using precombustion chamber combustion system, i.e., being formed in precombustion chamber is suitable for the rich mixture lighted, and passes through spark ignitor
After form high-temperature fuel gas, high-temperature fuel gas injects main chamber through channel, lights the Weak mixture in main combustion chamber, realizes layering combustion
It burns, can effectively improve flame propagation velocity, reduce engine emission, improve engine efficiency.
Fuel injection device is mounted on by current precombustion chamber combustion system such as patent CN1316154C, CN1563680A
In precombustion chamber, while fuel is supplied into precombustion chamber and main combustion chamber.For marine large-diameter engine, pre-chamber volume is compared to master
It is too small to fire room volume, supplies fuel into main combustion chamber only with the indoor fuel feed system of pre-burning, it may appear that main combustion chamber internal combustion
Expect that air-fuel ratio is excessive, in precombustion chamber and the unreasonable phenomenon of main combustion chamber fuel pro rate.Meanwhile precombustion chamber single spraying pore structure
It is unfavorable for the quick full combustion of gaseous mixture in large bore engine cylinder.Patent CN101858245A, by being completed in induction stroke
High-temperature area scavenging achievees the purpose that cooling, improves lean flammability limit, improves the thermal efficiency.The above patent is without reference to by excellent
Change the matching of gas handling system, precombustion chamber and chamber structure, organize reasonable air motion in cylinder, reaching improves cylinder fuel combustion
Speed is burnt, the purpose of the thermal efficiency is improved.
Summary of the invention
The purpose of the present invention is to provide gas flame propagation distance is shortened in structure, marine large-diameter natural gas is realized
Gaseous mixture rapidly and efficiently burns in engine cylinder, improves engine efficiency, and reduce a kind of marine large-diameter natural gas of discharge
Engine precombustion chamber multiple jet ignition type highly effective combustion system.
The object of the present invention is achieved like this:
A kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type highly effective combustion system of the present invention, including
Cylinder cap, cylinder jacket, piston, air intake duct, exhaust duct, piston are located in cylinder jacket, are combustion chamber between top land and cylinder cap, into
Inlet valve is set in air flue, exhaust valve is set in exhaust duct, it is characterized in that: setting provides the natural gas of thin combustion gas in air intake duct
The position of feedway, natural air feed system is located at before inlet valve, and precombustion chamber is arranged in cylinder head, sets respectively in precombustion chamber
It sets spark plug and the precombustion chamber gas spraying injection device of overrich combustion gas is provided, the part that precombustion chamber stretches in combustion chamber is provided with
Spray orifice.
The present invention may also include:
1, combustion chamber plan view shape is plum blossom-shaped, and the combustion chamber of plum blossom-shaped includes convex ridge, is constituted between convex ridge and convex ridge
The regional area of indent, combustion chamber vertical section are ω shape.
2, the number of the convex ridge is six, and the regional area of the indent of composition is six, the spray orifice and partial zones
Domain number is identical, and position is corresponding.
3, convex ridge axis is vertical with piston-top surface, and different convex ridge axis are identical as the distance between cylinder axis axis.
4, the air intake duct is spiral inlet duct, and spray orifice is gradual shrinkage.
5, precombustion chamber gas spraying injection device is mounted on precombustion chamber side, and the combustion gas sprayed is laterally in intake combustion chamber.
Spray orifice and cylinder axis axis angle are 60-80 degree.
Present invention has an advantage that
1. greatly improving efficiency of combustion
Existing marine large-diameter natural gas engine, since natural gas itself catches fire temperature is high, flame propagation is slow etc. is asked
Topic, limits the promotion of engine efficiency.And the present invention forms multiple igniting using the high-temperature high-pressure fuel gas that porous channel sprays
Source and the compact structure of main combustion chamber, shorten Flame of Natural Gas propagation distance, realize lean mixture multizone in cylinder and ignite
Burning.Meanwhile the jet-flow of high temperature and pressure destroys the vortex of the large scale in cylinder, improves the turbulence intensity in cylinder, so that
Efficiency of combustion significantly improves.
2. reducing discharge
Since the gasoline air mixture ratio in cylinder is big, so that the temperature peak in cylinder is lower, to improve emission performance.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of main chamber；
Fig. 3 is the air motion schematic diagram in compression travel cylinder；
Fig. 4 is the jet-flow schematic diagram in main chamber；
Fig. 5 is the jet-flow cross-sectional view in main chamber.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1-5, a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type of the present invention efficiently fires
Burning system, including air intake duct 4, natural air feed system 5, inlet valve 6, exhaust duct 7, exhaust valve 8, precombustion chamber 9, precombustion chamber are natural
The main combustion chamber that gas spraying device 10, spark plug 11 and one are made of cylinder head 1, piston 2 and cylinder jacket 3.Have two sets it is natural
Gas feeder, a set of natural air feed system 5 is mounted on air intake duct 4, for providing thin combustion gas into main combustion chamber；It is another
Set is mounted in cylinder head 1, for providing overrich combustion gas into precombustion chamber 9.Air intake duct 4 is spiral inlet duct, spiral inlet duct
Structure makes natural gas and air Mixture enter cylinder back wall around the flowing of cylinder axis axis, forms large scale vortex, increases
Initial flow perturbation in cylinder；Piston-top surface is equipped with ω shape combustion chamber 13, ω shape combustion chamber 13 is circumferential be arranged symmetrically six it is opposite
Convex ridge 14, convex ridge axis is vertical with piston-top surface, for combustion chamber (13) to be divided into six compact-sized regional areas 15.Together
When six 14 axis of convex ridge it is identical as the distance between cylinder axis axis, which can rationally utilize large scale eddy in cylinder
Stream forms the vortex of opposite direction by the effect of fluid viscous force in ω shape combustion chamber regional area 15, and it is rapid to increase air-flow
Kinetic energy is horizontal, is conducive to combustion gas mixing in cylinder.
Precombustion chamber 9 is arranged in cylinder head 1, and 9 central axis of precombustion chamber is conllinear with cylinder axis axis.9 lower part of precombustion chamber
It protrudes into main combustion chamber, precombustion chamber lower part is circumferentially arranged symmetrically six spray orifices 12, is connected to precombustion chamber 9 and main combustion chamber.Precombustion chamber spray orifice
12 is tapered, and connection precombustion chamber side injection diameter is 1mm to 2mm, and connection main combustion chamber side injection diameter is 3mm to 4mm；
Length-diameter ratio of spray orifice is 2.Precombustion chamber gas spraying injection device 10 is mounted on 9 side of precombustion chamber, and overrich combustion gas is sprayed into precombustion chamber.
Spark plug 11 is mounted on 9 upper surface central location of precombustion chamber, guarantees that ignition flame is equidistant around and uniformly propagates, lights precombustion chamber
Rich mixture in 9.
A part of Weak mixture in compression stage, cylinder is entered in precombustion chamber 9 by precombustion chamber spray orifice 12, will be pre-
Combustion room gas spraying injection device 10 is mounted on 9 side of precombustion chamber, so that the combustion gas ejected laterally is injected in Weak mixture, benefit
It is quickly mixed in pre-burning indoor fuel gas.In time of ignition, spark plug 11 lights the rich mixture in precombustion chamber 9, and it is high to form high temperature
Compression ignition gas, high-temperature high-pressure fuel gas obtain higher effluxvelocity and longer through away from injection master under the action of tapered spray orifice
Combustion is indoor.High temp jet lights the Weak mixture in main combustion chamber as incendiary source.Main combustion chamber is protruded by changing precombustion chamber 9
Angle between distance and spray orifice and cylinder axis axis can control high-temperature fuel gas and inject the specified combustion zone of main chamber
(15) in.Angle is 60 degree between precombustion chamber spray orifice in the present invention, 60 degree to 80 degree of spray orifice and central axis of air cylinder wire clamp acute angle.
In Fig. 3, piston-top surface center is equipped with ω shape combustion chamber 13, combustion chamber 13 is circumferential be arranged symmetrically six it is opposite convex
Ridge 14, convex ridge axis is vertical with piston-top surface, and 14 axis of convex ridge is identical as the distance between cylinder axis axis.With piston
Uplink, the chamber structure can entreat in a combustion chamber position to form large scale vortex rationally using vortex in cylinder.Pass through fluid
The effect of viscous force forms the vortex of opposite direction in partial combustion region 15, increases air-flow tubulence energy level, is conducive in cylinder
Interior quick formation homogeneous lean gaseous mixture.Meanwhile ω shape chamber structure is compact, and the biography of high-temperature fuel gas flame is shortened in structure
Distance is broadcast, the quick full combustion of gaseous mixture in cylinder is conducive to.
In figures 4 and 5, the indoor rich mixture of pre-burning forms high-temperature fuel gas through spark ignitor, and high-temperature fuel gas is through pre-
Room spray orifice is fired to inject in main combustion chamber.The distance and spray orifice and cylinder axis axis of main combustion chamber can be protruded by changing precombustion chamber 9
Between angle, control high-temperature fuel gas injects the specified combustion zone of main chamber.Main combustion chamber combustion zone and precombustion chamber spray orifice one
One is corresponding.The tapered jet orifice structure of precombustion chamber makes high-temperature fuel gas have longer penetration distance.High-temperature fuel gas jet stream is broken simultaneously
It is broken in partial combustion region and is vortexed, improve the turbulence intensity of cylinder interior air-flow, so that high-temperature fuel gas jet hit is to more
Unburned mixture shortens Flame of Natural Gas propagation distance, effectively increases burn rate, realizes that multizone is efficiently quick in cylinder
Burning, improves the efficiency of combustion of large-bore vessel natural gas engine, and reduces discharge.
Apparatus of the present invention have two sets of natural gas supply devices, a set of to be mounted on air intake duct, another set of to be mounted in cylinder cap
On, for being supplied to precombustion chamber；Air intake duct is spiral inlet duct, for forming intake swirl in cylinder；Piston-top surface is equipped with
ω shape burns room, and ω shape combustion chamber is circumferentially arranged symmetrically six opposite convex ridges, and the convex ridge axis is vertical with piston-top surface,
For combustion chamber to be divided into six compact-sized regional areas；Precombustion chamber is arranged in cylinder head, precombustion chamber central axis with
Cylinder axis axis is overlapped；Spark plug is mounted on precombustion chamber upper surface center, guarantees that ignition flame is equidistant around and uniformly propagates；
Precombustion chamber gas spraying injection device is mounted on precombustion chamber side；Precombustion chamber lower part is protruded into main combustion chamber, and lower part is circumferentially arranged symmetrically
Six precombustion chamber spray orifices, are connected to precombustion chamber with main combustion chamber, and the distance and spray orifice axis of main combustion chamber are protruded by adjusting precombustion chamber
With the angle between cylinder axis axis, controls high-temperature high-pressure fuel gas in precombustion chamber and spray into the specified region in combustion chamber, light main combustion
Indoor lean mixture realizes the conflagration of lean mixture in cylinder.
Precombustion chamber lower part outside wall surface coats high-temperature resistant coating.
Spray orifice be it is tapered, least radius be 1mm to 2mm, maximum radius 3mm to 4mm；Length-diameter ratio of spray orifice is greater than 2.
Angle is 60 degree between spray orifice, 60 degree to 80 degree of spray orifice and central axis of air cylinder wire clamp acute angle, spray orifice and the ω shape
Combustion chamber regional area is corresponding.
Convex ridge cross section is hill-like；Cylinder axis is directed toward at the top of convex ridge, convex ridge top surface is arc surface, and arc radius is
6mm to 9mm；Convex ridge side is arc surface, and arc radius is 40mm to 50mm；Between convex ridge crestal line and cylinder axis axis away from
From for 86mm to 93mm.Convex ridge size defines the size of regional area, so that ω shape chamber structure is compact, shortens high temperature
Gas flame radial propagation distance is conducive to the quick full combustion of unburned mixture in cylinder.
Six convex ridge crestal lines are identical at a distance from cylinder axis axis, so that in compression stroke stage ω shape combustion chamber center
Large scale vortex is formed, by the effect of fluid viscous force, so that forming the vortex of opposite direction in regional area, is conducive in cylinder
Combustion gas mixing.
Claims (10)
1. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type highly effective combustion system, including cylinder cap, gas
Cylinder sleeve, piston, air intake duct, exhaust duct, piston are located in cylinder jacket, are combustion chamber between top land and cylinder cap, in air intake duct
Inlet valve is set, exhaust valve is set in exhaust duct, it is characterized in that: the natural gas that setting provides thin combustion gas in air intake duct supplies dress
It sets, the position of natural air feed system is located at before inlet valve, and precombustion chamber is arranged in cylinder head, spark is respectively set in precombustion chamber
The precombustion chamber gas spraying injection device of plug and offer overrich combustion gas, the part that precombustion chamber stretches in combustion chamber is provided with spray orifice.
2. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 1 efficiently fires
Burning system, it is characterized in that: combustion chamber plan view shape is plum blossom-shaped, the combustion chamber of plum blossom-shaped includes convex ridge, convex ridge and convex ridge it
Between constitute indent regional area, combustion chamber vertical section be ω shape.
3. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 2 efficiently fires
Burning system, it is characterized in that: the number of the convex ridge is six, the regional area of the indent of composition is six, the spray orifice with
Regional area number is identical, and position is corresponding.
4. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 2 or 3 is high
Imitate combustion system, it is characterized in that: convex ridge axis is vertical with piston-top surface, between different convex ridge axis and cylinder axis axis away from
From identical.
5. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 1 to 3
Highly effective combustion system, it is characterized in that: the air intake duct is spiral inlet duct, spray orifice is gradual shrinkage.
6. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 4 efficiently fires
Burning system, it is characterized in that: the air intake duct is spiral inlet duct, spray orifice is gradual shrinkage.
7. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 1 to 3
Highly effective combustion system, it is characterized in that: precombustion chamber gas spraying injection device is mounted on precombustion chamber side, the combustion gas sprayed is laterally taken the photograph
Enter in combustion chamber.Spray orifice and cylinder axis axis angle are 60-80 degree.
8. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 4 efficiently fires
Burning system, it is characterized in that: precombustion chamber gas spraying injection device is mounted on precombustion chamber side, the combustion gas sprayed laterally intake burning
In room.Spray orifice and cylinder axis axis angle are 60-80 degree.
9. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 5 efficiently fires
Burning system, it is characterized in that: precombustion chamber gas spraying injection device is mounted on precombustion chamber side, the combustion gas sprayed laterally intake burning
In room.Spray orifice and cylinder axis axis angle are 60-80 degree.
10. a kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type according to claim 6 is efficient
Combustion system, it is characterized in that: precombustion chamber gas spraying injection device is mounted on precombustion chamber side, the combustion gas sprayed laterally intake combustion
It burns in room.Spray orifice and cylinder axis axis angle are 60-80 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156396.3A CN109184898A (en) | 2018-09-29 | 2018-09-29 | A kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type highly effective combustion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156396.3A CN109184898A (en) | 2018-09-29 | 2018-09-29 | A kind of marine large-diameter natural gas engine precombustion chamber multiple jet ignition type highly effective combustion system |
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| CN109184898A true CN109184898A (en) | 2019-01-11 |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318859A (en) * | 2019-06-26 | 2019-10-11 | 哈尔滨工程大学 | A kind of engine layering jet quick-burning method of multi-injection natural gas |
| CN110318900A (en) * | 2019-06-26 | 2019-10-11 | 哈尔滨工程大学 | In a kind of cylinder, the combustion method of inlet manifold and precombustion chamber mixed gas supply |
| CN112211714A (en) * | 2020-11-27 | 2021-01-12 | 山东交通学院 | Shock wave combustion-supporting precombustion chamber structure of gas engine |
| CN113090379A (en) * | 2021-04-29 | 2021-07-09 | 广西玉柴机器股份有限公司 | Layered gas engine combustion chamber and vortex rotation center processing method |
| CN113107698A (en) * | 2021-05-07 | 2021-07-13 | 东风柳州汽车有限公司 | Internal combustion engine |
| CN113389651A (en) * | 2021-07-30 | 2021-09-14 | 潍柴动力股份有限公司 | Piston and engine |
| CN113389634A (en) * | 2021-07-30 | 2021-09-14 | 广西玉柴机器股份有限公司 | Strong-flow-squeezing high-turbulence centrifugal piston combustion chamber and combustion system |
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| CN115247601A (en) * | 2022-03-16 | 2022-10-28 | 长城汽车股份有限公司 | Engine and vehicle |
| CN114991941A (en) * | 2022-06-16 | 2022-09-02 | 一汽解放汽车有限公司 | Combustion system of natural gas engine, natural gas engine and vehicle |
| CN114991941B (en) * | 2022-06-16 | 2023-09-26 | 一汽解放汽车有限公司 | Combustion system of natural gas engine, natural gas engine and vehicle |
| CN115095424A (en) * | 2022-06-17 | 2022-09-23 | 潍柴动力股份有限公司 | Transient compensation ultra-lean-burn gas engine and method |
| CN115324719A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Pre-combustion chamber, combustion system and engine |
| CN115324723A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Combustion system and gas engine |
| CN115324719B (en) * | 2022-10-14 | 2023-01-20 | 潍柴动力股份有限公司 | Pre-combustion chamber, combustion system and engine |
| CN115324723B (en) * | 2022-10-14 | 2023-03-21 | 潍柴动力股份有限公司 | Combustion system and gas engine |
| CN116201630A (en) * | 2023-02-27 | 2023-06-02 | 重庆长安汽车股份有限公司 | Hydrogen engine combustion system and combustion mode control method |
| CN116201630B (en) * | 2023-02-27 | 2024-04-16 | 重庆长安汽车股份有限公司 | Hydrogen engine combustion system and combustion mode control method |
| CN118008612A (en) * | 2024-01-23 | 2024-05-10 | 中国重型汽车集团有限公司 | Pre-combustion chamber piston |
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Application publication date: 20190111 |