CN209671067U - A kind of flame annular jet pre-burning device for internal combustion engine - Google Patents
A kind of flame annular jet pre-burning device for internal combustion engine Download PDFInfo
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- CN209671067U CN209671067U CN201920060029.7U CN201920060029U CN209671067U CN 209671067 U CN209671067 U CN 209671067U CN 201920060029 U CN201920060029 U CN 201920060029U CN 209671067 U CN209671067 U CN 209671067U
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- fuel injector
- flame
- lower chamber
- inner core
- jet
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Ignition Installations For Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model discloses a kind of flame annular jet pre-burning device for internal combustion engine, including upper cavity, lower chamber, spark plug and fuel injector, is connected with each other between upper cavity and lower chamber by screw thread；The space that the lower end surface of upper cavity and the hollow parts of lower chamber are formed is precombustion chamber, and lower chamber bottom is connect with engine cylinder cover；The side screw thread of fuel injector fastening bolt is connect with upper cavity, and the other side screw thread of fuel injector fastening bolt is connect with high-pressure oil pipe, and fuel injector is equipped with fuel hole, and high-pressure oil pipe passes through fuel hole to fuel injector fuel feeding；Spark plug is diagonally-installed in upper cavity, and the spray orifice of fuel injector is tilting towards spark plug direction；Tight loop, inner core retainer plate and jet stream inner core are installed in lower chamber, the flame jet ring communicated with engine main chamber is provided between jet stream inner core and lower chamber, which can guarantee the uniformity of burning and realize the acceleration of combustion process.Can guarantee simultaneously also can reliable ignition and burning inside precombustion chamber in external fuel oil rareness.
Description
Technical field
The utility model belongs to internal combustion engine and field of combustion technology, cyclic annular more particularly to a kind of flame for internal combustion engine
Jet stream pre-burning device can be used for the pinking suppression of the lean burn and engine of the acceleration of spark-ignition engine initial flame and entirety
System.
Background technique
Currently, how internal combustion engine makes internal combustion engine reach the worldwide that the higher thermal efficiency and lower pollutant become
The hot spot of interior concern.Traditional spark-ignition engine forms initial flame by plug ignition in combustion chamber, flame propagation and
Development is so that in-cylinder pressure increases, and promotion piston does work, to generate power output.But this combustion system is within the engine
It burns under small load condition excessively slowly, it is difficult to obtain preferable fuel economy.The utility model proposes flame acceleration dress
The spread speed of flame in the combustion chamber can be greatly improved by setting, and improved the turbulivity of jet flame, started so as to improve spark ignition type
Machine burns slowly under middle small load condition, the low problem of the thermal efficiency.
Although a kind of engine turbulent jet igniting precombustion chamber combustion system disclosed in 106194395 A of Chinese patent CN
Spark-ignition engine burn rate can also be promoted, but its fluidic architecture is porous structure, multi beam shape, thus fire is presented in jet flame
There is inhomogeneities in the combustion chamber for flame.
Utility model content
The purpose of this utility model is to overcome deficiencies in the prior art, provide a kind of flame rings for internal combustion engine
Shape jet stream pre-burning device, the pre-burning device is interior to have spark plug and small flow fuel injector simultaneously.The ring-type that flame may be implemented is penetrated
Stream, it is ensured that the uniformity of burning and the acceleration for realizing combustion process.Meanwhile the small flow fuel injector that the pre-burning device integrates can
Additionally for precombustion chamber provide fuel, it is ensured that also can reliable ignition and combustion inside precombustion chamber when fuel oil rareness outside the precombustion chamber
It burns.
The purpose of this utility model is achieved through the following technical solutions:
A kind of flame annular jet pre-burning device for internal combustion engine is installed on engine cylinder and covers and connect with high-pressure oil pipe
It connects, which is characterized in that including upper cavity, lower chamber, spark plug and fuel injector, pass through screw thread between the upper cavity and lower chamber
It is connected with each other and is formed with the seal face of annular；The space that the lower end surface of upper cavity and the hollow parts of lower chamber are formed is pre-burning
Room, lower chamber are connect by installing screw thread with engine cylinder cover；The threaded spray in two sides has been wholely set on the fuel injector
The side screw thread of oily device fastening bolt, the fuel injector fastening bolt is connect with upper cavity, the other side of fuel injector fastening bolt
Screw thread is connect with high-pressure oil pipe, and fuel hole is equipped in the fuel injector fastening bolt, and high-pressure oil pipe is realized by the fuel hole
To fuel injector fuel feeding；
The spark plug is connected through a screw thread diagonally-installed in the upper cavity, and the spray orifice of fuel injector is tilting towards spark plug
Direction；
Tight loop, inner core retainer plate and jet stream inner core are installed, the inner core retainer plate passes through described in the lower chamber
Tight loop is fixed in lower chamber, and inner core retainer plate is connected through a screw thread the jet stream inner core, the jet stream inner core and lower chamber
Between be provided with the flame jet ring communicated with engine main chamber, the flame jet ring is that width is 0.5mm~2mm
Annular slot can make jet flame in umbrella jet stream.
Further, the seal face between the upper cavity and lower chamber is equipped with the copper backing for sealing.
Further, the diameter of the fuel hole is 3~5mm.
Further, the fuel injector is equipped with polytetrafluoroethylsealed sealed circle, is interference fitted simultaneously between polytetrafluoroethylsealed sealed circle and upper cavity
First of sealing of fuel injector is formed, the seal face formed between fuel injector and upper cavity is that the second of fuel injector seals.
Further, the screw thread of the spark plug is M12 × 1.25, reach 19mm.
Further, the bottom of the jet stream inner core is provided with the flat recess being easily installed, and sets on the inner core retainer plate
It is equipped with four sector flame recirculation holes of the circulation for jet flame.
Further, the first groove and the second groove, first groove are respectively equipped on the lower chamber and tight loop
For the installation and removal between lower chamber and engine cylinder cover, second groove is for the peace between tight loop and lower chamber
Assembly and disassembly.
Further, the fuel injector is the tilting single hole fuel injector of spray orifice, injection diameter 0.12mm-0.25mm it
Between.
Further, precombustion chamber has oil feeding type burning and non-oil feeding type two kinds of operating modes of burning: oil feeding type burn application
In the lean-burn conditions of engine, it is ensured that the gaseous mixture of precombustion chamber is reliable to realize always near stoichiometric ratio
Igniting and initial flame development；For non-oil feeding type burn application in main chamber is chemical equivalent the case where, precombustion chamber is for being promoted
Burn rate.Compared with prior art, beneficial effect brought by the technical solution of the utility model is:
1. the jet flame that jet stream inner core projects in utility model device is in umbrella jet stream, jet flame is equal in 360 degree
Even distribution can largely reduce the inhomogeneities of jet flame distribution.The device substantially reduces flame propagation velocity, from
And a possibility that reducing end gaseous mixture spontaneous combustion, there is inhibitory effect to combustion knock.
2. in the case that gas is very thin in engine combustion room, the indoor burning of pre-burning can be made by fuel injector
It maintains near chemical equivalent, so that still reliable ignition in the case where lean burn, significantly Smaller load starts in promotion
The thermal efficiency of machine.
3. the utility model under engine equivalent combustion conditions, is conducive to improve the flame propagation velocity of all directions, mention
High engine thermal efficiency, while inhibiting detonating combustion；
Detailed description of the invention
Fig. 1 is the configuration schematic diagram of utility model device.
Fig. 2 is the three dimensional structure diagram of utility model device.
Fig. 3 is the schematic cross-sectional view of utility model device.
Fig. 4 is the section view enlarged structure schematic diagram of cavity of resorption body portion.
Fig. 5 is the partial 3 d structural schematic diagram of inner core retainer plate Yu jet stream inner core.
Fig. 6 is the overlooking structure diagram of lower chamber assembly.
Fig. 7 is the combustion pressure curve figure of precombustion chamber and main chamber.
Appended drawing reference: 1- lower chamber, 2- tight loop, 3- fuel injector, 4- fuel injector fastening bolt, 5- upper cavity, 6- spark
Plug, 7- inner core retainer plate, 8- jet stream inner core, 9- connection screw thread, 10- connection screw thread, 11- fuel hole, 12- lower chamber install spiral shell
Line, 13- install screw thread, 14- seal face, 15- seal face, the polytetrafluoroethylsealed sealed circle of 16-, 17- seal face, 18- jet stream ring, 19- installation
Screw thread, 20- screw thread, 21- precombustion chamber, 22- tight loop seal face, 23- inner core retainer plate seal face, 24- flame recirculation hole, 25-
Flat recess, the first groove of 26-, the second groove of 27-
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
The utility model proposes pre-burning device lighted first by spark plug 6 in combustion it is mixed in precombustion chamber 21
Gas is closed, the propagation of initial flame is so that the pressure in precombustion chamber 21 gradually rises, and when flame reaches jet stream ring 18, flame can be sent out
Raw all or part of breath of quenching, generates high-temperature heat flux and high activity combustion product, and under the action of precombustion chamber internal and external pressure difference to
Engine chamber generates turbulent jet, which is in umbrella-shaped structure, can make the fuel oil for burning indoor that cyclic annular multiple spot occur certainly
Combustion, thus reach quickening burn rate, the effect for improving the thermal efficiency, and combustion knock being inhibited to burn.
As shown in Figure 1, the pre-burning device primary structure includes upper cavity 5, lower chamber 1, fuel injector 3, fuel injector fastening spiral shell
Bolt 4, spark plug 6, jet stream inner core 8 and the inner core retainer plate 7 and tight loop 2 of fixing jet stream inner core.Jet stream pre-burning device peace
After dress as shown in Fig. 2, fuel injector 3 and spark plug 6 are mounted on upper cavity 5, and the fixation of fuel injector is fastened by fuel injector
Bolt 4, which compresses, to be realized, fuel injector fastening bolt 4 is installed on upper cavity 5 by connection screw thread 10.In fuel injector fastening bolt 4
The connection screw thread 9 of the other side realize the confession to fuel injector 3 for connect with high-pressure oil pipe, and by the fuel hole 11 of inside
Oil, the diameter of fuel hole 11 is in 4mm or so.Jet stream pre-chamber arrangement after the utility model installation installs screw thread by lower chamber
12, which are mounted on engine cylinder, covers.
Fig. 3 is the cross-sectional view after the assembly of this jet stream pre-burning Installation practice, and the sealing of fuel injector 3 passes through polytetrafluoroethylsealed sealed circle 16
It realizes, polytetrafluoroethylsealed sealed circle 16 is installed in the mounting hole of oil sprayer of upper cavity 5 by interference fit, forms first of fuel injector
Sealing.Fuel injector 3 is installed in upper cavity 5 by compression mode, is realized and is compressed especially by seal face 15, and so as to form spray
The second of oily device seals.The lower end surface of fuel injector should be as concordant with upper cavity lower end surface as possible, and fuel injector is the small flow of single hole
Fuel injector, spray orifice is tilting, and direction is approximately towards spark plug direction, to guarantee the fuel concentration optimum near spark plug 6
Fire and initial flame are propagated.Spark plug 6 is tilting to be installed on upper cavity 5, to guarantee structure as compact as possible, in the present embodiment
6 screw thread of spark plug is M12 × 1.25, and reach 19mm, spark plug, which is adopted, realizes sealing by seal face 14.Since this is practical
Novel jet flow pre-burning apparatus structure is compact, to avoid spark plug and fuel injector from generating interference during installation, needs first to use internal diameter
The Hexagonal jacket of 14mm installs spark plug 6, then fuel injector 3 is packed into upper cavity 5 and is compressed；Fuel injector should be first dismantled in disassembly
3, then dismantle spark plug 6.It should be noted that should be use up since the fit system of the polytetrafluoroethylsealed sealed circle 16 of fuel injector is interference fit
It is likely to reduced the dismounting number of fuel injector, to guarantee the reliability of sealing ring.The connection of upper cavity 5 and lower chamber 1 passes through installation
Screw thread 13 realizes that the seal face 17 of the two is anchor ring, and the slight deformation that the copper backing by being placed in seal face 17 generates is real
It now seals, to guarantee that the sealing surface can bear the high temperature and high pressure that burning generates.
Fig. 4 is the partial enlarged view of lower chamber 1 and related assembly parts.There are a rings between jet stream inner core 8 and lower chamber 1
Shape gap, the gap are flame jet ring 18, the width of flame jet ring 18 0.5mm between 2mm, it can be achieved that flame is quenched
Breath and acceleration.Jet stream inner core 8 is connected by installing screw thread 19 with inner core retainer plate 7, and the two passes through inner core retainer plate seal face 23
Realize positioning, inner core retainer plate seal face 23 needs to guarantee enough flatness and verticality, to guarantee the vertical of jet stream inner core
Installation.Inner core retainer plate 7 is fixed in lower chamber 1 by tight loop 2, and tight loop 2 passes through screw thread to the compression of inner core retainer plate 7
20 and tight loop seal face 22 realize.After component assembly in lower chamber 1, the lower end surface of upper cavity 5 and the hollow part of lower chamber 1
Dividing the space formed is precombustion chamber 21.
By can be seen that in Fig. 5, the installation that there is a flat recess 25 to be used for jet stream inner core 8 for the bottom surface of jet stream inner core 8, inner core
Retainer plate 7 opens the circulation there are four sector flame recirculation hole 24 for flame.As seen from Figure 6, on lower chamber 1 and tight loop 2
It is respectively equipped with the first groove 26 and the second groove 27.First groove 26 can be used for the installation between lower chamber and engine cylinder cover
And disassembly, the second groove 27 is then for the installation and removal between tight loop 2 and lower chamber 1.To guarantee lower chamber 1 and tight loop
2 are installed on disassembly, need to customize dedicated dismantling device according to first groove 26 and the second groove 27.
The annular jet pre-burning device of the utility model is successfully assembled and is installed on after cylinder covers, specific
Embodiment be divided into two classes, i.e. non-oil feeding type burning is burnt with oil feeding type.Non- oil feeding type burning is mainly used in engine
Middle and high load working condition, the indoor petrol-air mixture of engine main burning is near stoichiometric ratio under such conditions.
For stoichiometric combustion process, the indoor fuel injector of pre-burning not fuel feeding, combustion mixture is mainly by for main chamber
The fuel injector of fuel feeding provides, and the combustion mixture of main chamber enters precombustion chamber in engine compresses stroke a part, makes pre-burning
Interior has the mixture strength that can be ignited.The oil feeding type burning of precombustion chamber is mainly used in the middle-low load of engine, In
The fuel oil of main chamber is less under this engine operating condition, generally in lean burn state, and this thin fuel states
It is unfavorable for the formation of plug ignition and initial fiery core.For the lean-burn conditions, the small flow fuel injector of precombustion chamber into
A certain amount of oil spout of row, oil injection time should be in engine compresses stroke, be diffused into main burning to avoid the fuel oil of precombustion chamber
Room, while the oil spout of precombustion chamber cannot be postponed very much, not exclusively cause rough burning and excessive carbon to avoid the evaporation of fuel oil
Cigarette generates.Oil injection event is controlled by individually injector controller, to guarantee accurate oil mass supply.In small flow fuel injector
After carrying out a certain amount of fuel oil injection, the indoor petrol-air mixture of pre-burning can be near stoichiometric ratio, it is ensured that spark
The reliable igniting of plug and initial stablizing for fiery core are formed.
Either oil feeding type burning is also non-oil feeding type burning, not due to the indoor petrol-air mixture concentration of pre-burning
It will appear too big variation, thus the indoor combustion process of pre-burning will not have too big difference.Curve can be analyzed substantially from Fig. 7
Combustion process inside precombustion chamber.Specifically, nearby initially forming initial fiery core, fire by spark plug after spark plug sparking
Core gradually develops to be propagated to unburned gas, and the indoor pressure of pre-burning gradually rises.Make in precombustion chamber and the pressure difference of main chamber
Under, a part of indoor gas of pre-burning, which is extruded, to be formed jet stream and enters main chamber.Continue to propagate and arrive in precombustion chamber flame
When up to precombustion chamber jet stream ring, all or part of breath of quenching occurs for the flame, generates the combustion intermediate product of high temperature high activity, and
Jet stream is formed under the action of pressure difference enters main chamber.The high temperature high activity product for entering main chamber is mixed with unburned
It closes gas to chemically react, multiple spot spontaneous combustion is generated in annular section fires winner to accelerate the combustion process of main chamber
The pressure for burning room is higher than pre-burning chamber pressure in turn.
The utility model is not limited to embodiments described above.Above the description of specific embodiment is intended to describe
With illustrate the technical solution of the utility model, the above mentioned embodiment is only schematical, is not restrictive.In
In the case of not departing from the utility model aims and scope of the claimed protection, those skilled in the art are practical at this
The specific transformation of many forms can be also made under novel enlightenment, these are belonged within the protection scope of the utility model.
Claims (9)
1. a kind of flame annular jet pre-burning device for internal combustion engine is installed on engine cylinder and covers and connect with high-pressure oil pipe
It connects, which is characterized in that including upper cavity, lower chamber, spark plug and fuel injector, pass through screw thread between the upper cavity and lower chamber
It is connected with each other and is formed with the seal face of annular；The space that the lower end surface of upper cavity and the hollow parts of lower chamber are formed is pre-burning
Room, lower chamber are connect by installing screw thread with engine cylinder cover；The threaded spray in two sides has been wholely set on the fuel injector
The side screw thread of oily device fastening bolt, the fuel injector fastening bolt is connect with upper cavity, the other side of fuel injector fastening bolt
Screw thread is connect with high-pressure oil pipe, and fuel hole is equipped in the fuel injector fastening bolt, and high-pressure oil pipe is realized by the fuel hole
To fuel injector fuel feeding；
The spark plug is connected through a screw thread diagonally-installed in the upper cavity, and the spray orifice of fuel injector is tilting towards spark plug side
To；
Tight loop, inner core retainer plate and jet stream inner core are installed, the inner core retainer plate passes through the fastening in the lower chamber
Circle is fixed in lower chamber, and inner core retainer plate is connected through a screw thread the jet stream inner core, between the jet stream inner core and lower chamber
It is provided with the flame jet ring communicated with engine main chamber, the flame jet ring is the ring-type that width is 0.5mm~2mm
Gap can make jet flame in umbrella jet stream.
2. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that on described
Seal face between cavity and lower chamber is equipped with the copper backing for sealing.
3. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that the combustion
The diameter of oilhole is 3~5mm.
4. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that the spray
Oily device is equipped with polytetrafluoroethylsealed sealed circle, and first of sealing of fuel injector is interference fitted and formed between polytetrafluoroethylsealed sealed circle and upper cavity,
The seal face formed between fuel injector and upper cavity is that the second of fuel injector seals.
5. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that the fire
The screw thread of Hua Sai is M12 × 1.25, reach 19mm.
6. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that described to penetrate
The bottom of stream inner core is provided with the flat recess being easily installed, and the circulation for jet flame is provided on the inner core retainer plate
Four sector flame recirculation holes.
7. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that under described
Be respectively equipped with the first groove and the second groove on cavity and tight loop, first groove for lower chamber and engine cylinder cover it
Between installation and removal, second groove is for installation and removal between tight loop and lower chamber.
8. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that the spray
Oily device is the tilting single hole fuel injector of spray orifice, and injection diameter is between 0.12mm-0.25mm.
9. a kind of flame annular jet pre-burning device for internal combustion engine according to claim 1, which is characterized in that precombustion chamber
There is oil feeding type burning and non-oil feeding type to burn two kinds of operating modes: oil feeding type burn application in the lean-burn conditions of engine,
The gaseous mixture of certifiable precombustion chamber near stoichiometric ratio, is developed with realizing reliably to light a fire with initial flame always；Non- confession
For oily formula burn application in main chamber is chemical equivalent the case where, precombustion chamber is for promoting burn rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920060029.7U CN209671067U (en) | 2019-01-15 | 2019-01-15 | A kind of flame annular jet pre-burning device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920060029.7U CN209671067U (en) | 2019-01-15 | 2019-01-15 | A kind of flame annular jet pre-burning device for internal combustion engine |
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| Publication Number | Publication Date |
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| CN209671067U true CN209671067U (en) | 2019-11-22 |
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ID=68565550
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920060029.7U Active CN209671067U (en) | 2019-01-15 | 2019-01-15 | A kind of flame annular jet pre-burning device for internal combustion engine |
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| CN (1) | CN209671067U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736932A (en) * | 2019-01-15 | 2019-05-10 | 天津大学 | A kind of flame annular jet pre-burning device for internal combustion engine |
| CN113944540A (en) * | 2020-07-17 | 2022-01-18 | 广州汽车集团股份有限公司 | Engine pre-combustion chamber structure, engine and automobile with engine pre-combustion chamber structure |
-
2019
- 2019-01-15 CN CN201920060029.7U patent/CN209671067U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736932A (en) * | 2019-01-15 | 2019-05-10 | 天津大学 | A kind of flame annular jet pre-burning device for internal combustion engine |
| CN113944540A (en) * | 2020-07-17 | 2022-01-18 | 广州汽车集团股份有限公司 | Engine pre-combustion chamber structure, engine and automobile with engine pre-combustion chamber structure |
| CN113944540B (en) * | 2020-07-17 | 2023-02-28 | 广州汽车集团股份有限公司 | Engine pre-combustion chamber structure, engine and automobile with engine pre-combustion chamber structure |
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