CN105317573B - Fuel-injecting method for in-cylinder direct-jet combustion system - Google Patents
Fuel-injecting method for in-cylinder direct-jet combustion system Download PDFInfo
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- CN105317573B CN105317573B CN201410268140.7A CN201410268140A CN105317573B CN 105317573 B CN105317573 B CN 105317573B CN 201410268140 A CN201410268140 A CN 201410268140A CN 105317573 B CN105317573 B CN 105317573B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000446 fuel Substances 0.000 claims abstract description 124
- 239000007921 spray Substances 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- 230000006698 induction Effects 0.000 claims abstract description 6
- 239000000295 fuel oil Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 description 8
- 238000010348 incorporation Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000008246 gaseous mixture Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A kind of fuel-injecting method for in-cylinder direct-jet combustion system, the wherein spark plug of in-cylinder direct-jet combustion system and fuel injector are respectively positioned on the intermediate region of top of combustion chamber；Fuel injector has two, is symmetricly set in the spark plug both sides；Do not interfere between the oily beam and spark plug of fuel injector injection, and do not interfere between the oily beam of two fuel injector injections；Under the operating mode of engine large load operation, in induction stroke, two fuel injectors of control spray simultaneously；Within the engine under the operating mode of Smaller load operation, in induction stroke, two fuel injectors of control are sprayed in turn or interval is sprayed in turn.Under different operating modes, while ensureing to spray pressure so that the discharge coefficient of spraying can be adjusted, and meet the requirement of corresponding operating mode.
Description
Technical field
The present invention relates to vehicular field, and in particular to a kind of fuel-injecting method for in-cylinder direct-jet combustion system.
Background technology
Engine is the important component in automobile, and the energy conversion of a certain form is exported to automobile and carried by it for mechanical energy
For power.
As shown in Figure 1-2, engine includes cylinder 5, and the top of cylinder 5 has cylinder head 6, and the bottom of cylinder 5 is connected with bent axle
8, piston 7 is connected to the top of bent axle 8, and piston 7 makees iterative motion with the rotation of bent axle 8 in cylinder 5；The top surface of piston 7
More than, the space formed below the bottom surface of cylinder head 6 is referred to as combustion chamber；Air intake duct 3, exhaust duct 4, spray are connected with cylinder head 6
Oily device 1 and spark plug 2, air intake duct 3 are stretched with exhaust duct 4 respectively at combustion chamber, the head of fuel injector 1 and spark plug 2
Enter combustion chamber.Wherein combustion chamber and it is connected to all parts of combustion chamber and is referred to as combustion system.
In-cylinder direct-jet combustion system is one kind of combustion system, in China, is influenceed by fuel qualities and post-processing technology,
The increasing proportion that in-cylinder direct-jet combustion system takes in the market.The arrangement of in-cylinder direct-jet combustion system mainly has
Two kinds, the first is that fuel injector 1 is arranged in into opposite side (i.e. air intake duct 3 outside) of the air intake duct 3 relative to exhaust duct 4, is used
Lateral injection, as shown in Figure 1；It is for second that fuel injector 1 between air intake duct 3 and exhaust duct 4 and is arranged in cylinder head 6
Intermediate region, using central-injection, as shown in Figure 2.
In the state of ideal, when engine is run under high rotating speed high load working condition, the combustion in often circulation penetrating cylinder
Oil mass is larger, it is desirable to which the discharge coefficient of fuel injector can improve as far as possible, to realize substantial amounts of fuel oil in intake process as soon as possible
Spray into cylinder, leave enough evaporation incorporation times, reach the effect of optimal uniform mixed combustion；When engine is medium and small
When being run under load condition, the amount of fuel that often circulation is sprayed into cylinder is considerably less, and incorporation time is more abundant, wishes fuel injector again
Discharge coefficient can reduce as far as possible, with injecting time of the proper extension fuel oil in intake process, improve the operation of fuel injector
Stability.
Therefore, engine (especially uniformly mixing in-cylinder direct fuel-injection engine) there is above-mentioned when selecting fuel injector
One group of contradiction, so as to which preferable state can not be realized.In order to solve the above problems, method that prior art employs compromise：Choosing
Select discharge coefficient fuel injector placed in the middle.But this can come again with it is new the problem of：When being run under high rotating speed high load working condition, due to
Fuel injector flow coefficient is not big enough, extends fuel injection time, reduces the evaporation incorporation time of spraying, drops to a certain extent
The uniformity of air-fuel mixture, have impact on the effect of burning in low cylinder；When engine is run under middle small load condition, it is necessary to
Reduce the discharge coefficient of fuel injector by reducing injection pressure, extend injecting time, due to spraying the reduction of pressure, grain of spraying
The average grain diameter of son can dramatically increase, and cause the atomizing effect of spraying and reduce, also reduce oil gas in cylinder to a certain extent and mix
The uniformity of conjunction, it have impact on burning and discharge.
The content of the invention
The present invention provides a kind of fuel-injecting method of in-cylinder direct-jet combustion system.It can meet engine in different works
To the demand of mist flow under condition, improve the atomization mixed effect of spraying, improve the uniformity of air-fuel mixture in cylinder, so as to real
Now more preferably burn, emission effect.
To solve the above problems, the present invention provides a kind of fuel-injecting method of in-cylinder direct-jet combustion system, in the cylinder
Direct-injection combustion system includes combustion chamber, and the top of combustion chamber is connected with spark plug and fuel injector；
The spark plug and the fuel injector are respectively positioned on the intermediate region of top of combustion chamber；
The fuel injector has two, is symmetricly set in the spark plug both sides；
Do not interfere between the oily beam and the spark plug of the fuel injector injection, and between the oily beam of two fuel injector injections
Do not interfere；
Under the operating mode of engine large load operation, in induction stroke, two fuel injectors of control spray simultaneously；
Within the engine Smaller load operation operating mode under, in induction stroke, control two fuel injectors spray in turn or
Interval is sprayed in turn.
Optionally, under all operating modes of engine, the actual mixing ratio of fuel oil burning is close to chemically correct fuel.
Optionally, the length that the fuel injector is stretched into combustion chamber is 5~10mm.
Optionally, the angle of the fuel injector and the burning chamber axial direction is 5~10 degree.
Optionally, the fuel injector is porous type fuel injector.
Optionally, the spray orifice of the fuel injector is 6~7, a diameter of 150~180 μm of the spray orifice.
Optionally, the in-cylinder direct-jet combustion system also includes air intake duct and the exhaust being connected with the top of combustion chamber
Road；
The air intake duct and the exhaust duct are respectively arranged outside the intermediate region of the top of combustion chamber, the air inlet
Road is positioned at the side of two fuel injectors, opposite side of the exhaust duct positioned at two fuel injectors.
Optionally, the air intake duct and the exhaust duct have two, and are respectively relative to the spark plug and are arranged symmetrically.
Compared with prior art, technical scheme has advantages below：
Relative to prior art, present invention employs two fuel injectors to be arranged symmetrically in top of combustion chamber, does not destroy existing
There is the characteristics of in-cylinder direct-jet combustion system.The discharge coefficient of each fuel injector can select the 65~70% of existing single fuel injector,
Select two a little bit smaller fuel injectors.So, under the operating condition of the big load of engine, sprayed simultaneously using two fuel injectors
The strategy penetrated, overall discharge coefficient can be improved, shorten fuel injection time, increase evaporation, the incorporation time of spraying, improved
During igniting in cylinder gaseous mixture the uniformity, be advantageous to burn and discharge；Within the engine under the operating condition of Smaller load, using two
Individual fuel injector sprays (once, two fuel injectors are used alternatingly for each fuel injector spray) in turn or interval sprays (each fuel injector in turn
Spray is multiple, and two fuel injectors are used alternatingly) strategy, fuel-injection pressure can be improved, lift the quality of spray atomization, increase cylinder
The uniformity of interior gaseous mixture, ensure preferably burning, emission effect.In addition, also increasing the stability of the fuel injector course of work, prolong
The service life of long fuel injector.
Brief description of the drawings
Fig. 1 is a kind of structural representation of in-cylinder direct-jet combustion system in the prior art；
Fig. 2 is the structural representation of another in-cylinder direct-jet combustion system in the prior art；
Fig. 3 is the structural representation of the in-cylinder direct-jet combustion system of fuel-injecting method of the embodiment of the present invention；
Fig. 4 is the schematic top plan view of the in-cylinder direct-jet combustion system of fuel-injecting method of the embodiment of the present invention；
Fig. 5 be fuel-injecting method of the embodiment of the present invention in-cylinder direct-jet combustion system in the section in piston main view direction show
It is intended to.
Embodiment
As described in the background art, in the operation of engine high load working condition and the operation of middle small load condition, to fuel injector
The requirement of flow system is entirely different, and current in-cylinder direct-jet system can not meet above two requirement simultaneously, so that can not
Reach preferable state, therefore in the design of in-cylinder direct-jet combustion system, the pattern of compromise can only be selected：Using discharge coefficient
Fuel injector placed in the middle.
When engine is run under high rotating speed high load working condition, it is possible to spray into a cycle 100 in cylinder~
120mg fuel oils, and when using discharge coefficient fuel injector placed in the middle, even if being sprayed according to system peak injection pressure 150bar,
Course of injection can also continue 150 crank angles (i.e. bent axle turns over 150 degree) left and right, then, easily cause to be sprayed in cylinder
Incorporation time be shortened, cause the problem of air-fuel mixture is uneven and oil dilution amount is big, and oil dilution amount can be led greatly
A series of problems, such as causing early combustion and super detonation.
When engine is run under middle and slow speed of revolution small load condition, the amount of fuel sprayed into cylinder sometimes only has 10-20mg.
If sprayed according to system peak injection pressure, fuel injector injecting time can be very short, that is, the unlatching of needle-valve in fuel injector,
Shut-in time can be very of short duration, can so cause fuel injector flow unstable, and then influences the performance of fuel injector.At present, in order to anti-
Model such case, as described in the background art, the method for reducing injection pressure is typically taken in actually controlling, such as：By
150bar injection pressure is reduced to 40-50bar.Although so extending injecting time, because injection pressure reduces, cause
The particle diameter of spraying increases several times, and correspondingly, the penetration degree of spraying is elongated, and atomization and evaporation are deteriorated, and ultimately result in the combustion of fuel oil
Burning stability reduces.
The present invention is directed to the above-mentioned problems in the prior art, there is provided a kind of fuel oil for in-cylinder direct-jet combustion system
Injection method.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
The present invention provides a kind of fuel-injecting method for in-cylinder direct-jet combustion system, wherein using in a kind of new cylinder
Direct-injection combustion system, reference picture 3-4, in-cylinder direct-jet combustion system include:
The combustion chamber 100 mainly surrounded by cylinder 120, cylinder head 130 and piston 110, the top of combustion chamber 100 connect
There are spark plug 102 and fuel injector 101；
The spark plug 102 and the fuel injector 101 are respectively positioned on the intermediate region of the top cylinder head 130 of combustion chamber 100, this
In " intermediate region " refer to around cylinder head 130 be centrally formed there is a range of region, i.e., relatively close cylinder
The region at the center of lid 130, does not imply that absolute center；
The fuel injector 101 has two, is symmetricly set in the both sides of spark plug 102；
Do not interfere between oily beam and the spark plug 102 that the fuel injector 101 sprays, and two fuel injectors 101 spray
Oily beam between do not interfere.That is, the oily beam 101a that fuel injector 101 sprays can not be sprayed onto on spark plug 102, otherwise can shadow
The ignition performance of spark plug 102 is rung, while can not be intersected between the oily beam 101a of two injections of fuel injectors 101, such as Fig. 3 institutes
Show, otherwise can influence to be sprayed at the mixing in cylinder 120 with air.
In order to avoid the situation of above-mentioned interference, the length that sets the fuel injector 101 to stretch into combustion chamber 100 in the present embodiment
Spend for 5~10mm.
In addition, the angle theta of the fuel injector 101 and the axial direction of combustion chamber 100 is 5~10 degree.If angle mistake
Greatly, then probably interfered between the oily beam 101a that two fuel injectors 101 spray.
In the present embodiment, employ two fuel injectors and be arranged symmetrically in top of combustion chamber, it is not necessary to destroy straight in existing cylinder
Spray the essential structure of combustion system.
In other embodiments, two fuel injectors 101 can also asymmetrically be arranged at 102 liang of the spark plug
Side, if do not interfere between meeting oily beam 101a and spark plug 102 that fuel injector 101 sprays, and two fuel injectors 101 spray
Oily beam 101a between do not interfere.
In addition, in the present embodiment, fuel injector 101 should be fixedly connected with cylinder head 130, can be by being respectively formed in spray
Screw thread on oily device 101 and cylinder head 130 realizes connection, or is otherwise coupled to, to ensure fuel injector 101 and cylinder head
It will not be offset from each other between 130.
In the present embodiment, the fuel injector 101 is porous type fuel injector.Specifically, the spray orifice of the fuel injector 101 is 6
~7, a diameter of 150~180 μm of the spray orifice.Porous type fuel injector is compared to for fuel injector of the prior art,
Spray particle diameter is small, small by back pressure in cylinder (what i.e. spraying was subject to flows pressure in opposite direction with spraying) influence, can be preferable
The form of ground control spraying, and there is the advantages of fast response time, stability height and dredge oil amount is small.
The model of fuel injector 101 can be according to the discharge capacity of engine come specifically chosen, such as the supercharging for discharge capacity 2.0L
Direct fuel-injection engine, if with the set-up mode of one fuel injector of prior art, it is necessary to select the static injection pressure down-offs of 100bar
For 920g/min fuel injector, can then select in the present embodiment the static injection pressure down-offs of two 100bar for 600~
650g/min fuel injector, that is, a little bit smaller fuel injector 101 of two discharge coefficients is selected, is so sprayed in single fuel injector 101
In the case of, the discharge coefficient of spraying is the 65~70% of prior art, and situation about being sprayed simultaneously in two fuel injectors 101
Under, the total flow coefficient of spraying can improve 30~40% than prior art；Meanwhile each fuel injector 101 is assigned to during injection
The oil mass of spray orifice reduces nearly 40%, can greatly reduce oily beam 101a penetration degree, reduces the amount of dilution of machine oil and its caused
Early combustion and super detonation frequency.
As can be seen here, the quantity for the fuel injector 101 that the combustion system can be sprayed simultaneously by control is sprayed to adjust
The discharge coefficient of mist.
Reference picture 3 simultaneously combines Fig. 5, and in the present embodiment, the piston 110 includes edge towards the top of combustion chamber 100
Direction is sequentially arranged and coaxially connected bottom 113,111 and second annular connecting portion 112 of first annular connecting portion；
The first annular connecting portion 111 has both ends in axial direction, and the second annular connecting portion 112 has edge
The inner peripheral 112a and outer peripheral edge 112b of radial direction；
One end of the first annular connecting portion 111 is connected with the circumferential edge 113a of the bottom 113, the other end and institute
State the inner peripheral 112a connections of the second annular connecting portion 112；
The inner wall sealing contact of combustion chamber 100 described in the outer peripheral edge 112b of the second annular connecting portion 112.
Further, the internal diameter of one end that the first annular connecting portion 111 is connected with the bottom 113 is less than the other end
Internal diameter.
Further, the first annular connecting portion 111 is convex to the inwall of cylinder 120.First annular connecting portion 111 exists
The shape of cross section of axial direction is curvilinear.
As can be seen here, in the present embodiment, piston 110 is connected by bottom 113, the annular of first annular connecting portion 111 and second
Portion 112 is formed by connecting, and the bottom surface of bottom 113 combines the shallow basin type knot to form piston 110 with the inwall of first annular connecting portion 111
The top surface of structure, as shown in Figure 4 so that the bottom surface of combustion chamber 100 is flatter, therefore is sprayed in cylinder 120 and forms tumble motion
When the resistance that is subject to it is smaller, be advantageous to spraying and the uniform mixing of air.
In the present embodiment, reference picture 3-4, in-cylinder direct-jet combustion system also includes what is be connected with the top of combustion chamber 100
Air intake duct 103 and exhaust duct 104；
The air intake duct 103 and the exhaust duct 104 are respectively arranged in the top cylinder head 130 of combustion chamber 100
Between outside region, the air intake duct 103 is located at two fuel injectors positioned at the side of two fuel injectors 101, the exhaust duct 104
101 opposite side.
The air intake duct 103 and the exhaust duct 104 have two, and are respectively relative to the 102 symmetrical cloth of spark plug
Put.
Here,, should if engine is engine with supercharger using the Four valve structure of twin-inlet and double-exhaust passage
When suitably setting larger by the Tumble and swirl of air intake duct 103, such as can be 1.5~3, to be advantageous to gas in cylinder 110
The flowing of body；If engine is naturally aspirated engine, the discharge coefficient of air intake duct 103 should properly increase, such as can
Think 1~1.5, there are enough air inflows during ensureing large load operation；Accordingly, the discharge coefficient of exhaust duct 104 should phase
It should improve, should be greater than 0.7, to cause waste gas to discharge combustion chamber 100 as soon as possible.
The advantages of above-mentioned arrangement, is, under the operating mode of engine large load operation, twin-inlet can ensure have enough
Air inflow, and because the Tumble and swirl of air intake duct 103 is higher, air can be promoted to form strong big chi in cylinder 120
Tumble motion is spent, on the one hand this tumble motion can help the mixing velocity of the internal spraying of cylinder 120 and air to accelerate, the opposing party
Face, spraying and air formed gaseous mixture compression stroke top dead centre due to the barrier effect meeting by the bottom surface of combustion chamber 100
It is broken to form the turbulent flow of small yardstick, and then the turbulence intensity in cylinder 120 can be improved (especially in igniting in cylinder 120
Turbulence intensity is up to 35m2/s2).Now, by Turbulent Flow Effects, after spark plug 102 is lighted a fire, flame has good spread speed, shape
Into preferable combustion efficiency.
Fuel-injecting method when above-mentioned in-cylinder direct-jet combustion system is used in the embodiment of the present invention is described below, wherein,
The in-cylinder direct-jet combustion system electrically connects with control unit of engine (not shown), and it is critical to set Optimal Load
Point, definition：It is high load working condition, when engine load operating mode is less than when engine load operating mode is more than the critical point of load
During the critical point of load, it is middle small load condition, then above-mentioned definition is input in control unit of engine, for defines spray
Emission mode；
In the fuel-injecting method：
Under the operating mode of engine large load operation, in the intake stroke, two fuel injectors 101 of control spray simultaneously
Penetrate；
Within the engine under the operating mode of Smaller load operation, in the intake stroke, a fuel injector injection is controlled, or, control
Two fuel injectors 101 of system spray in turn or interrupted injection.
Further, the combustion system also includes in cylinder and is connected to the bent axle of the bottom of combustion chamber 100
(not shown)；
The fuel injector 101 is controlled to start to spray when top dead centre front crankshaft corner is 280~300 degree.
Further, it is 600~650g/ to control discharge coefficient of the fuel injector 101 when spraying pressure and being 100bar
min。
It should be noted that in the present embodiment, engine uses uniform mixed combustion engine, is all adopted under all operating modes
With the pattern of uniform mixed combustion, the actual mixing ratio of fuel oil burning is close to chemically correct fuel.
In the present embodiment, when engine high load working condition is run using the mode of operation of two fuel injectors 101 injection simultaneously,
Injecting time can be greatly shortened while the discharge coefficient of lifting spraying, such as original 150 crank angles of needs come
Injection is completed, only needs 90 crank angle cans to complete now, so, during air inlet, the fuel oil of injection has
More the times complete to evaporate to be atomized and simultaneously mixed with air, gaseous mixture in cylinder 120 when being advantageous to improve the igniting of spark plug 102
Uniformity；
Within the engine using the mode of operation of a fuel injector injection during small operating mode operation, or, using fuel injector 101
In turn injection (each fuel injector spray 1 time every time, two fuel injectors are used alternatingly) or interrupted injection (spray of each fuel injector is multiple, two
Fuel injector is used alternatingly) mode of operation, i.e., the same time only has a fuel injector 101 to spray, reduces the discharge coefficient of spraying；
On the one hand, the discharge coefficient of each fuel injector 101 is only of the prior art 65~70%, can with proper extension injecting time,
And larger injection pressure can be used, improve the job stability of needle-valve in fuel injector 101；On the other hand, fuel injector 101 replaces
Use, can reduce the time that needle-valve continuously works in fuel injector 101, extend the service life of fuel injector 101.
To sum up, above-mentioned fuel-injecting method can both ensure the quality of spraying, and and can meets stream different under different operating modes
Coefficient of discharge requirement.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, this is not being departed from
In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (8)
1. a kind of fuel-injecting method for in-cylinder direct-jet combustion system, the in-cylinder direct-jet combustion system includes combustion chamber,
The top of combustion chamber is connected with spark plug and fuel injector；It is characterized in that：
The spark plug and the fuel injector are respectively positioned on the intermediate region of top of combustion chamber；
The fuel injector has two, is symmetricly set in the spark plug both sides；
Do not interfere between the oily beam and the spark plug of the fuel injector injection, and do not done between the oily beam of two fuel injector injections
Relate to；
Under the operating mode of engine large load operation, in induction stroke, two fuel injectors of control spray simultaneously；
Within the engine under the operating mode of Smaller load operation, in induction stroke, two fuel injectors of control spray in turn or interval
Spray in turn.
2. fuel-injecting method as claimed in claim 1, it is characterised in that under all operating modes of engine, fuel oil burning
Actual mixing ratio is close to chemically correct fuel.
3. fuel-injecting method as claimed in claim 1, it is characterised in that the length that the fuel injector is stretched into combustion chamber is
5~10mm.
4. fuel-injecting method as claimed in claim 3, it is characterised in that the fuel injector and the burning chamber axial direction
Angle be 5~10 degree.
5. fuel-injecting method as claimed in claim 1, it is characterised in that the fuel injector is porous type fuel injector.
6. fuel-injecting method as claimed in claim 5, it is characterised in that the spray orifice of the fuel injector is 6~7, described
A diameter of 150~180 μm of spray orifice.
7. fuel-injecting method as claimed in claim 1, it is characterised in that the in-cylinder direct-jet combustion system also includes and institute
State the air intake duct and exhaust duct of top of combustion chamber connection；
The air intake duct and the exhaust duct are respectively arranged outside the intermediate region of the top of combustion chamber, the air intake duct position
In the side of two fuel injectors, opposite side of the exhaust duct positioned at two fuel injectors.
8. fuel-injecting method as claimed in claim 7, it is characterised in that the air intake duct and the exhaust duct have two
Bar, and be respectively relative to the spark plug and be arranged symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410268140.7A CN105317573B (en) | 2014-06-16 | 2014-06-16 | Fuel-injecting method for in-cylinder direct-jet combustion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410268140.7A CN105317573B (en) | 2014-06-16 | 2014-06-16 | Fuel-injecting method for in-cylinder direct-jet combustion system |
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| CN105317573B true CN105317573B (en) | 2018-03-30 |
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| CN110821639B (en) * | 2018-08-07 | 2022-04-05 | 大连理工大学 | Multi-mode engine with high-energy ignition fuel and control method thereof |
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| CN110821659A (en) * | 2018-08-07 | 2020-02-21 | 大连理工大学 | Reformed gas-based single-fuel ignition chamber type two-stroke engine and combustion control method |
| CN110821651A (en) * | 2018-08-07 | 2020-02-21 | 大连理工大学 | Dual-fuel plasma nozzle type two-stroke engine and combustion control method |
| CN110821650A (en) * | 2018-08-07 | 2020-02-21 | 大连理工大学 | Dual-fuel ignition chamber type two-stroke engine and combustion control method |
| CN110821660A (en) * | 2018-08-07 | 2020-02-21 | 大连理工大学 | Reformed gas-based single-fuel spark plug type four-stroke engine and combustion control method |
| CN110821654B (en) * | 2018-08-07 | 2022-04-01 | 大连理工大学 | Dual-fuel spark plug type four-stroke engine based on reformed gas and combustion control method |
| CN110821640A (en) * | 2018-08-07 | 2020-02-21 | 大连理工大学 | Ignition chamber type engine with high-energy ignition fuel and control method thereof |
| CN112555017B (en) * | 2019-09-26 | 2022-06-28 | 联合汽车电子有限公司 | Lean combustion system, lean combustion engine and lean combustion method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6691649B2 (en) * | 2000-07-19 | 2004-02-17 | Bombardier-Rotax Gmbh | Fuel injection system for a two-stroke engine |
| CN201047326Y (en) * | 2007-06-26 | 2008-04-16 | 杜春平 | Double flow nipple engines |
| CN102425516B (en) * | 2011-11-03 | 2014-04-16 | 北京理工大学 | Multi-valve oil spraying system and multi-valve oil spraying method |
| DE102012214261A1 (en) * | 2012-08-10 | 2014-05-22 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine with a first and a second injector |
| CN103291480A (en) * | 2013-06-13 | 2013-09-11 | 清华大学 | Method for restraining super knocks of direct-injection supercharged engine in cylinder |
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