CN108757209A - Heavy End Aviation Fuel engine and aircraft - Google Patents
Heavy End Aviation Fuel engine and aircraft Download PDFInfo
- Publication number
- CN108757209A CN108757209A CN201810535063.5A CN201810535063A CN108757209A CN 108757209 A CN108757209 A CN 108757209A CN 201810535063 A CN201810535063 A CN 201810535063A CN 108757209 A CN108757209 A CN 108757209A
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- China
- Prior art keywords
- spark plug
- guide portion
- fuel
- oil
- piston
- Prior art date
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- 239000000446 fuel Substances 0.000 title claims abstract description 83
- 239000000295 fuel oil Substances 0.000 claims abstract description 52
- 238000002156 mixing Methods 0.000 claims abstract description 40
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- 238000002485 combustion reaction Methods 0.000 claims abstract description 27
- 230000000712 assembly Effects 0.000 claims abstract description 18
- 238000000429 assembly Methods 0.000 claims abstract description 18
- 238000000889 atomisation Methods 0.000 claims abstract description 17
- 239000003921 oil Substances 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 14
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 8
- 239000008246 gaseous mixture Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/28—Other pistons with specially-shaped head
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/26—Pistons having combustion chamber in piston head
-
- 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention discloses a kind of Heavy End Aviation Fuel engine and aircrafts,The top surface of piston forms the spill guide portion sinking relative to piston-top surface,The outermost point of lateral surface radially is more than or flushes in the fuel injection direction of fuel oil ejection assemblies,Lead surface is more than radially-inwardly the ignition location of center spark plug,The top surface of the inventive piston spill guide portion sinking relative to piston-top surface corresponding with the injection direction of fuel oil ejection assemblies,The fuel of penetrating is guided to plug ignition region,Optimize piston-top surface,To optimize combustion chamber,Change compression ratio,Reduce risk for knock,Enhance tumble flow effect simultaneously,Heavy oil is enabled to realize more adequately atomization mixing,Uniform combustion mixture is formed after good mixing,It can also organize the burning of fuel-efficient,Ensure heavy oil in the dynamic property applied to engine,Economy and emission performance,It realizes energy saving after heavy oil is applied to engine,Environmental protection and low cost.
Description
Technical field
The present invention relates to engine and application, more particularly to a kind of Heavy End Aviation Fuel engine and aircraft.
Background technology
Fuel of the heavy oil as engine, will be as the power trend of middle-size and small-size aircraft；But heavy oil viscosity is high, low temperature stream
Dynamic property is poor, causes atomizing effect poorer than common light oil, affects combustion efficiency, even result in engine start difficulty with
And discharge is not up to standard.
In the prior art, in order to ensure that heavy fuel burning engine can have good atomization and startup, have and use carburetion
The fuel system such as device+auxiliary preheating technology, mechanical injection (fuel direct injection), electronic fuel injection.But due to heavy oil itself
Property problem is unable to reach the fogging degree of general oil product, and can not uniformly be mixed between burning air, is being lighted
Original EFI ignition way can not be used when starting；Even if using ignition way to be run, then also due to burning not
Fully lead to a series of engine problems, cannot achieve the reliable atomization of heavy oil and fuel combination can not be organized efficiently to fire
It burns, also allows for the effect that heavy oil is unable to reach expectation applied to dynamic property, economy and the emission performance of engine, to make weight
The application of oil can not be popularized on a large scale.
Therefore, it is necessary to be improved to existing heavy fuel burning engine, enable to heavy oil realize more adequately atomization and
Uniform mixing, and the burning of fuel-efficient can be organized, ensure heavy oil in the dynamic property, economy and row applied to engine
Putting property realizes the energy-saving and environmental protection after heavy oil is applied to engine and low cost.
Invention content
In view of this, the object of the present invention is to provide a kind of Heavy End Aviation Fuel engine and aircraft, heavy oil is enabled to
It realizes more adequately atomization and uniform mixing, and the burning of fuel-efficient can be organized, ensure heavy oil applied to starting
Dynamic property, economy and the emission performance of machine realize the energy-saving and environmental protection after heavy oil is applied to engine and low cost.
The Heavy End Aviation Fuel engine of the present invention, including cylinder body, cylinder head and piston component, combustion chamber is by the combustion processed on cylinder head
It burns room face to be formed, i.e., the combustion chamber of engine is the space structure surrounded by the combustion chamber face of cylinder head and the piston-top surface of piston component
At as shown, the piston of piston component is located in cylinder body；The cylinder head is equipped with the fuel oil injection for injecting fuel into combustion chamber
Component；The top surface of piston forms the spill guide portion sinking relative to piston-top surface；The spill guide portion and fuel oil injection group
The fuel injection direction of part is corresponding, including lateral surface, bottom and the lead surface that radially ecto-entad seamlessly transits successively, institute
The outermost point of lateral surface radially is stated to be more than or flush in the fuel injection direction of fuel oil ejection assemblies, the extraction face diameter
To the ignition location for being more than inwardly center spark plug；The i.e. described fuel oil ejection assemblies deliver fuel to after spill guide portion by spill
Guide portion guides fuel to plug ignition region；It is opposite that the installation position of spill guide portion need to be located at fuel oil ejection assemblies
Position, spill guide portion is using reflecting and being formed guiding when fuel injection, conducive to tumble flow is formed, conducive to impact mist is further formed
Change and mix, and the structure changes compression ratio, reduces risk for knock.
Further, the lead surface is in generally vertical upwards from bottom or is slightly tilted to spill guide portion outside, lateral surface,
The transition structure of bottom and lead surface, drainage effect are smooth；Since lead surface has been over the ignition zone of center spark plug,
Larger tumble flow is directly formed after fuel hits lead surface by injection, up to center spark plug under the constraint of lead surface
Ignition zone so that the abundant ignition of fuel in entire spill guide portion has preferable guiding effect, further mixes
Merge finely disintegrated fuel, and being smoothed out conducive to igniting；The condition of the generally vertical error for referring to allow to have certain
Under be vertically arranged, can also be the curved surface being vertically arranged, uneven sliding surface etc., allow that there is smaller inclination etc., above-mentioned
In generally vertical range；The whistle tilts the inclination for referring to allowing having certain low-angle outward, belongs to people in the art
The data parameters that member is able to confirm that in process.
Further, further include the second spill guide portion sinking relative to piston-top surface, the second spill guiding position
In the side of the spill guide portion diametrically, and the second spill guide portion passes through a gentle inclined-plane and spill guide portion
The upper edge of lead surface seamlessly transits, the second spill guide portion have the second lead surface, second lead surface with it is described
It is located at the bottom rounding off of the second spill guide portion between gentle inclined-plane；Air-flow can reflect after spraying to spill guide portion
Go out and enter the second spill guide portion, and the second spill guide portion provides smooth ignition conducive to while being further formed tumble flow
Condition, especially the second spill guide portion is generally used for dual ignition plug structure, is located at the ignition zone of another spark plug, shape
At the smooth and uniform ignition of dual ignition plug.
Further, second lead surface is in generally vertical or slightly recessed to second upwards from the bottom of the second spill guide portion
It is tilted on the outside of shape guide portion；Generally vertical structure directly forms larger rolling after fuel hits the second lead surface by injection
Stream, up to ignition zone under the constraint of the second lead surface so that the fuel in entire spill guide portion is fully lighted a fire combustion
It burns, there is preferable guiding effect, further mixing and finely disintegrated fuel, and being smoothed out conducive to igniting.
Further, the upper edge of the lead surface is higher than piston-top surface, which can further constrain the fuel of penetrating
Guiding is upward, ensure that the ignition zone for accumulating in center spark plug, and conducive to the abundant realization of tumble flow；The upper edge of lateral surface
It is seamlessly transitted with piston-top surface, connecting along both sides between the upper edge of lead surface and the upper edge of lateral surface seamlessly transits；Second
The bottom of spill guide portion is seamlessly transitted by the upper edge on a gentle inclined-plane and the lead surface of spill guide portion, and described second
It is located at the bottom rounding off of the second spill guide portion between lead surface and the gentle inclined-plane；The upper edge of second lead surface
To piston-top surface longitudinal edge along upward gentle dip transition；The second spill guide portion is formed spill guide portion by both sides
Semi-surrounding；After the semi-surrounding structure may make the fuel for being injected into spill guide portion to carry out preliminary mixing, tumble flow, part is fired
Material is flowed out by both sides, and enters the second spill guide portion by both sides under the shunting of higher lead surface, is drawn by second
The shock formation in face is sufficiently mixed rear inlet point flame range domain, conducive to being sufficiently mixed and smooth ignition.
Further, further include fuel oil ejection assemblies, the fuel oil ejection assemblies include that fuel nozzle, premixer and oil gas are mixed
Nozzle is closed, there is the injector and compressed air inlet (the namely pressure of air compression system of fuel nozzle in the premixer
Contracting air outlet slit), after the atomization that oil-air mixing nozzle connection premixer forms fuel oil and compressed air in premixer
Mixed oil and gas be sent into engine combustion chamber；It is realized in premixer using auxiliary low pressure air and premixes and be further atomized combustion
The fuel oil that oil burner nozzle sprays ensures that later stage direct-injection enters behind combustion chamber to be formed and is more more fully atomized, to realize heavy oil
Fully burning and utilization；It not only ensure that the further atomization of fuel droplet, moreover it is possible to ensure equal between auxiliary air and droplet
Even mixing, into combustion chamber after being capable of homogenous combustion；Fuel nozzle generally uses EFI mode, and details are not described herein.
Further, the dual ignition plug formed by spark plug I and spark plug II is installed, the spark plug I is on the cylinder head
Center spark plug；The oil-air mixing nozzle is respectively in I both sides of spark plug with spark plug II；Center line, the fire of the spark plug I
The center line of flower plug II and the center line of oil-air mixing nozzle are substantially coplanar, and substantially coplanar refers to the error for allowing to have certain,
Such as smaller inclination and dislocation, have no effect on the understanding coplanar to this programme；On the section coplanar by this, the oil gas
The injection direction of mixing nozzle is from top to bottom to centroclinal；Radial position of the upper edge of the lead surface on piston-top surface
It is more than inwardly the ignition location of spark plug I, the radial position of the upper edge of second lead surface on piston-top surface surpasses outward
Cross the ignition location of spark plug II；The position of lead surface and the second lead surface makes the fuel base of the oil-air mixing nozzle injection
This face spill guide portion and spill guide portion and the second spill guide portion by the abundant tumble flow of fuel and introduce ignition zone；It is practical
Superolateral surface and lead surface are respectively formed the front and back sides (according to air-flow general direction) of spill guide portion, and the second lead surface position
In the corresponding position with spark plug II, in the second spill guide portion, air-flow is entered by both sides and in the pact of the second spill guide portion
Reached under beam and rush at ignition zone along the second lead surface after the second lead surface, there is preferable tumble flow effect, fully provide by
Fuel introduces the space of ignition zone, is uniformly mixed, and is conducive to igniting and full and uniform burning, prevents pinking.
Further, the spark plug I and spark plug II opposite tilt from top to bottom, the combustion chamber face on cylinder head is intermediate attached
Nearly downwardly projecting and lower protruding parts is correspondingly formed the inclined-plane substantially vertical with its axis with spark plug I, substantially vertical finger
It is to allow that there is the vertical of certain error, ensure that mounting stability and the craftsmanship of manufacture, and the inclined-plane draws lead surface
The gaseous mixture gone out has certain guiding function so that spark plug has preferable ignition results；The upper edge of the lead surface
Radially it is no more than spark plug I, is conducive to fully extend the extraction flow of fuel, gather in ignition zone conducive to fuel.
Further, the injection direction of the oil-air mixing nozzle is 16 ° -20 °；The igniting angle of spark plug II is 40 °-
50°；The injection direction of oil-air mixing nozzle is suitable for the sparking mode of atomization property and adaptation dual ignition plug in heavy oil,
It fully burns conducive to tissue igniting and final obtain.
The invention also discloses a kind of aircraft, the aircraft is equipped with the Heavy End Aviation Fuel engine.
Beneficial effects of the present invention：The Heavy End Aviation Fuel engine and aircraft of the present invention, top surface and the fuel oil of piston spray
The corresponding spill guide portion sinking relative to piston-top surface of injection direction of component, the fuel of penetrating is guided to spark plug
Ignition zone optimizes piston-top surface, to optimize combustion chamber, changes compression ratio, reduces risk for knock, while enhancing tumble flow
Effect enables to heavy oil to realize more adequately atomization mixing, forms uniform combustion mixture after good mixing, also
The burning of fuel-efficient can be organized, ensures that heavy oil in the dynamic property, economy and emission performance applied to engine, realizes heavy oil
Applied to after engine energy-saving and environmental protection and low cost.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the engine structure schematic diagram of the present invention；
Fig. 2 is fuel oil ejection assemblies structural schematic diagram.
Fig. 3 is piston stereogram；
Fig. 4 is piston radial to sectional view.
Specific implementation mode
As shown in the figure：The Heavy End Aviation Fuel engine of the present embodiment, including cylinder body 5, cylinder head 13 and piston component, as schemed institute
Show, the piston 1 of piston component is located in cylinder body 5；The cylinder head is equipped with the fuel oil ejection assemblies a for injecting fuel into combustion chamber；
The top surface of piston 1 forms the spill guide portion 2 sinking relative to piston-top surface；The spill guide portion 2 and fuel oil ejection assemblies
Fuel injection direction it is corresponding, including lateral surface 21, bottom 22 and lead surface that radially ecto-entad seamlessly transits successively
23, the outermost point of the lateral surface 21 radially is more than or flushes in the fuel injection directions of fuel oil ejection assemblies and (refer to
Be when fuel oil component sprays, and the position of piston makes spill guide portion correspond to injection direction), the lead surface 23 is radial
It is more than inwardly the ignition location of center spark plug；The i.e. described fuel oil ejection assemblies are drawn after delivering fuel to spill guide portion by spill
Portion is led to guide fuel to plug ignition region；The installation position of spill guide portion need to be located at the opposite portion of fuel oil ejection assemblies
Position, spill guide portion is using reflecting and being formed guiding when fuel injection, conducive to tumble flow is formed, conducive to impact atomization is further formed
And mixing, and the structure changes compression ratio, reduces risk for knock.
In the present embodiment, the lead surface 23 is in generally vertical upwards from bottom or is slightly tilted to spill guide portion outside,
Lateral surface, bottom and lead surface transition structure, drainage effect is smooth；Since lead surface has been over the point of center spark plug
Flame range domain directly forms larger tumble flow, under the constraint of lead surface up in after fuel hits lead surface by injection
The ignition zone of heart spark plug so that the abundant ignition of fuel in entire spill guide portion has preferable guiding effect,
Further mixing and finely disintegrated fuel, and being smoothed out conducive to igniting；The generally vertical mistake for referring to allow to have certain
It is vertically arranged under conditions of difference, can also be the curved surface being vertically arranged, uneven sliding surface etc., allow that there is smaller inclination etc.,
In above-mentioned generally vertical range；The whistle tilts the inclination for referring to allowing having certain low-angle outward, belongs to ability
The data parameters that field technique personnel are able to confirm that in process.
Further include the second spill guide portion 3 sinking relative to 1 top surface of piston in the present embodiment, second spill is drawn
It leads portion 3 and is located at the side of the spill guide portion 2 diametrically, the second spill guide portion has the second lead surface 33；Gas
Stream is being sprayed to can reflect and enter the second spill guide portion 3 after spill guide portion 2, and the second spill guide portion 3 be conducive into
While one step forms tumble flow, the condition of smooth ignition is provided, especially the second spill guide portion is generally used for dual ignition plug
Structure is located at the ignition zone of another spark plug, forms the smooth and uniform ignition of dual ignition plug.
In the present embodiment, second lead surface 33 by the second spill guide portion 3 bottom 32 upwards be in it is generally vertical or
Slightly to inclination on the outside of the second spill guide portion；Generally vertical structure is directly formed after fuel hits the second lead surface by injection
Larger tumble flow, up to ignition zone under the constraint of the second lead surface so that the fuel in entire spill guide portion fills
Divide ignition, with preferable guiding effect, further mixes simultaneously finely disintegrated fuel, and being smoothed out conducive to igniting.
In the present embodiment, the upper edge of the lead surface 23 is higher than 1 top surface of piston, which can be by the fuel of penetrating into one
Step constraint guiding is upward, extends and draws flow, ensure that the ignition zone for accumulating in center spark plug, and conducive to the abundant of tumble flow
It realizes；The upper edge of lateral surface 21 is seamlessly transitted with piston-top surface, the upper edge of lead surface 23 and the upper edge of lateral surface 21 it
Between connect along both sides and seamlessly transit；The bottom 32 of second spill guide portion 3 passes through a gentle inclined-plane 31 and spill guide portion 2
The upper edge of lead surface 23 seamlessly transits, and draws positioned at the second spill between second lead surface 33 and the gentle inclined-plane 31
Lead 32 rounding off of bottom in portion；The upper edge of second lead surface 33 to piston-top surface longitudinal edge along upward gentle dip
It crosses；The second spill guide portion 3 forms semi-surrounding by both sides to spill guide portion 2；The semi-surrounding structure, which may make, to be injected into
Enter spill guide portion fuel carry out preliminary mixing, tumble flow after, part of fuel is flowed out by both sides, and in higher lead surface
Shunting under by both sides enter the second spill guide portion, rear inlet point flame range is sufficiently mixed by the shock of the second lead surface formation
Domain, conducive to being sufficiently mixed and smooth ignition.
In the present embodiment, the fuel oil ejection assemblies a includes fuel nozzle 6, premixer 7 and oil-air mixing nozzle 8, described
There is the injector of fuel nozzle 6 in premixer 7 and (compressed air of namely air compression system goes out for compressed air inlet
Mouthful), the oil-air mixing nozzle 8 is connected to the mixing after the atomization that premixer 7 forms fuel oil and compressed air in premixer
Oil gas is sent into the combustion chamber of engine；Premix and further atomizing fuel nozzle are realized in premixer using auxiliary low pressure air
The fuel oil of ejection ensures that later stage direct-injection enters behind combustion chamber to be formed and is more more fully atomized, to realize the abundant combustion of heavy oil
It burns and utilizes；This premix atomization not only ensure that fuel oil different from the impact atomization of the simple pressure air of the prior art
The further atomization of droplet, moreover it is possible to ensure between auxiliary air and droplet it is uniform mix, into combustion chamber after can uniformly fire
It burns；Fuel nozzle generally uses EFI mode, and details are not described herein.
As shown, fuel oil ejection assemblies are tightly connected shape by fuel nozzle 6, premixer 7 and oil-air mixing nozzle 8 successively
At, it is tightly connected to be formed by mounting base 10 between fuel nozzle 6 and oil-air mixing nozzle 8 and fix, and premixer is directly formed
It is simple and compact for structure in mounting base 10；Fuel nozzle is equipped with fuel inlet fitting 61, and premixer 7 is empty by pneumatic fitting 9, compression
The compressed air outlet of 16 connect compressor of tracheae；The air inlet 91 of premixer is the gas outlet of pneumatic fitting 9.
In the present embodiment, the dual ignition plug formed by spark plug I 14 and spark plug II 4, the fire are installed on the cylinder head
Spark plug centered on flower plug I；The oil-air mixing nozzle 8 is respectively in I 14 both sides of spark plug with spark plug II 4, i.e., radially
Three arranges；Igniting is provided using dual ignition plug, the characteristic with high-energy ignition, in conjunction with air-assisted atomization above-mentioned and in advance
Mixed scheme, ensure engine various operating modes and under the conditions of reliable and secure igniting, start relative to traditional heavy oil is compression-ignited
Machine further decreases engine volume and weight, is suitable for aircraft (aircraft etc.) use；The structure makes in-cylinder direct-jet enter
Gaseous mixture it is corresponding with the igniting orientation of spark plug, be formed about dense combustion gas mixing area in spark plug, be conducive to and burning air
Further mixing, to organize the burning of fuel-efficient；The center line of the spark plug I 14, the center line and oil of spark plug II 4
The center line of gas mixing nozzle 8 is substantially coplanar, and substantially coplanar refers to the error for allowing to have certain, such as smaller inclination and mistake
Position, has no effect on the understanding coplanar to this programme；On the section coplanar by this, the injection direction of the oil-air mixing nozzle
From top to bottom to centroclinal；Radial position of the upper edge of the lead surface on piston-top surface is more than inwardly spark plug I 14
Ignition location, the radial position of the upper edge of second lead surface 33 on piston-top surface is more than spark plug II 4 outward
Ignition location；The position of lead surface and the second lead surface makes the basic face spill of fuel of the oil-air mixing nozzle injection draw
It leads portion and spill guide portion and the second spill guide portion by the abundant tumble flow of fuel and introduces ignition zone；Practical superolateral surface and draw
The front and back sides (according to air-flow general direction) of spill guide portion are respectively formed, and the second lead surface is located at and spark plug II
Corresponding position, in the second spill guide portion, air-flow by both sides enter and reach second under the constraint of the second spill guide portion
Ignition zone is rushed at along the second lead surface after lead surface, there is preferable tumble flow effect, fully provide and introduce the fuel into igniting
The space in region is uniformly mixed, and is conducive to igniting and full and uniform burning, is prevented pinking.
In the present embodiment, the spark plug I 14 and spark plug II 4 opposite tilt from top to bottom, the combustion chamber face on cylinder head
The downwardly projecting and lower protruding parts is correspondingly formed the inclined-plane substantially vertical with its axis, base with spark plug I 14 near centre
Originally it vertically refers to allowing to have the vertical of certain error, ensure that mounting stability and the craftsmanship of manufacture, and the inclined-plane pair
There is certain guiding function in the gaseous mixture that lead surface is drawn so that spark plug has preferable ignition results.
In the present embodiment, the oil-air mixing nozzle 8 is respectively in I 14 both sides of spark plug with spark plug II 4, and the oil gas is mixed
The injection direction for closing nozzle is 16 ° -20 °, preferably 18 °；The igniting angle of spark plug II is 40 ° -50 °, preferably 45 °, igniting folder
Angle refers to the angle of the axis direction of spark plug；What angle (including injection direction) here referred to is all the folder with cylinder center line
Angle, details are not described herein；The structure makes the gaseous mixture that in-cylinder direct-jet enters after the drainage of the spill guide portion of top land, with
The igniting orientation of spark plug is corresponding, is formed about dense combustion gas mixing area in spark plug, and further mix conducive to burning air
It closes, to form efficient tissue burning；The injection direction of oil-air mixing nozzle be suitable in heavy oil atomization property and
The sparking mode for adapting to dual ignition plug is fully burnt conducive to tissue igniting and final obtain.
In the present embodiment, the spark plug I 14 is located at the centre position or neighbouring (center spark plug) of top of combustion chamber, by
In spark plug I 14 it is centrally located or near, be correspondingly arranged with spark plug II 4, the punching of fuel that oil-air mixing nozzle 8 is sprayed
To I 14 ignition zone of spark plug and it is distributed in the ignition zone of spark plug II 4, is conducive to after injection after being sufficiently mixed and lighting a fire
Adequately burning.
The upper and lower of the present invention refers to orientation corresponding with piston-top surface, and for piston, top surface direction refers to
It is upper relative to cylinder head direction, under cylinder body is toward piston skirt under being on being；Top land is provided with for avoiding keeping away for valve
It allows slot, belongs to the needs in structure, details are not described herein.
The invention also discloses a kind of aircraft, the aircraft is equipped with the Heavy End Aviation Fuel engine.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.
Claims (10)
1. a kind of Heavy End Aviation Fuel engine, including cylinder body, cylinder head and piston component, it is characterised in that：The cylinder head is equipped with will
Fuel sprays into the fuel oil ejection assemblies of combustion chamber；The top surface of piston forms the spill guide portion sinking relative to piston-top surface；
The spill guide portion is corresponding with the fuel injection direction of fuel oil ejection assemblies, including radially ecto-entad is put down successively
Slip over the lateral surface crossed, bottom and lead surface, the outermost point of the lateral surface radially is more than or flushes in fuel oil injection
The fuel injection direction of component, the lead surface are more than radially-inwardly the ignition location of center spark plug.
2. Heavy End Aviation Fuel engine according to claim 1, it is characterised in that：The lead surface is in basic upwards by bottom
Vertically or slightly to inclination on the outside of spill guide portion.
3. Heavy End Aviation Fuel engine according to claim 2, it is characterised in that：Further include sinking relative to piston-top surface
Second spill guide portion, the second spill guide portion are located at the side of the spill guide portion diametrically, and described second is recessed
Shape guide portion has the second lead surface.
4. Heavy End Aviation Fuel engine according to claim 3, it is characterised in that：Second lead surface is drawn by the second spill
The bottom for leading portion is in generally vertical upwards or slightly to inclination on the outside of the second spill guide portion.
5. Heavy End Aviation Fuel engine according to claim 4, it is characterised in that：The upper edge of the lead surface is higher than piston
Top surface, upper edge and the piston-top surface of lateral surface seamlessly transit, along two between the upper edge of lead surface and the upper edge of lateral surface
Side, which connects, to be seamlessly transitted；The top that the bottom of second spill guide portion passes through a gentle inclined-plane and the lead surface of spill guide portion
Along seamlessly transitting, the round and smooth mistake in bottom of the second spill guide portion is located between second lead surface and the gentle inclined-plane
It crosses；The upper edge of second lead surface to piston-top surface longitudinal edge along upward gentle dip transition；The second spill guide portion
Semi-surrounding is formed to spill guide portion by both sides.
6. Heavy End Aviation Fuel engine according to claim 5, it is characterised in that：The fuel oil ejection assemblies include fuel oil spray
Mouth, premixer and oil-air mixing nozzle have injector and the compressed air inlet of fuel nozzle, the oil in the premixer
Gas mixing nozzle is connected to premixer and starts the mixed oil and gas feeding after atomization that fuel oil and compressed air are formed in premixer
The combustion chamber of machine.
7. Heavy End Aviation Fuel engine according to claim 6, it is characterised in that：Installation is by I He of spark plug on the cylinder head
The dual ignition plug that spark plug II is formed, spark plug centered on the spark plug I；The oil-air mixing nozzle divides row with spark plug II
In I both sides of spark plug；The center line of the center line of the spark plug I, the center line of spark plug II and oil-air mixing nozzle is basic
Coplanar, on the section coplanar by this, the injection direction of the oil-air mixing nozzle is from top to bottom to centroclinal；It is described to draw
Radial position of the upper edge appeared on piston-top surface is more than inwardly the ignition location of spark plug I, second lead surface
Radial position of the upper edge on piston-top surface is more than the ignition location of spark plug II outward.
8. Heavy End Aviation Fuel engine according to claim 7, it is characterised in that：The spark plug I and spark plug II are by upper
To lower opposite tilt, the combustion chamber face on cylinder head correspond to spark plug I position is downwardly projecting and the lower protruding parts and spark
Plug I is correspondingly formed the inclined-plane substantially vertical with its axis.
9. Heavy End Aviation Fuel engine according to claim 7, it is characterised in that：The injection direction of the oil-air mixing nozzle
It is 16 ° -20 °；The igniting angle of spark plug II is 40 ° -50 °.
10. a kind of aircraft, it is characterised in that：The aircraft is equipped with the aviation weight of claim 1 to 9 any claim
Oil turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810535063.5A CN108757209A (en) | 2018-05-29 | 2018-05-29 | Heavy End Aviation Fuel engine and aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810535063.5A CN108757209A (en) | 2018-05-29 | 2018-05-29 | Heavy End Aviation Fuel engine and aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108757209A true CN108757209A (en) | 2018-11-06 |
Family
ID=64003791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810535063.5A Withdrawn CN108757209A (en) | 2018-05-29 | 2018-05-29 | Heavy End Aviation Fuel engine and aircraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108757209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761889A (en) * | 2019-09-30 | 2020-02-07 | 广西擎芯动力科技有限公司 | Ignition type two-stroke heavy oil direct injection engine combustion chamber in cylinder |
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| US20040079322A1 (en) * | 2002-10-29 | 2004-04-29 | Hitachi, Ltd. | Control apparatus for internal combustion engine and control method for internal combustion engine combustion method for internal combustion engine and direct injection engine |
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| CN110761889A (en) * | 2019-09-30 | 2020-02-07 | 广西擎芯动力科技有限公司 | Ignition type two-stroke heavy oil direct injection engine combustion chamber in cylinder |
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Application publication date: 20181106 |