CN108412603A - Piston combustion chamber structure - Google Patents
Piston combustion chamber structure Download PDFInfo
- Publication number
- CN108412603A CN108412603A CN201810381005.1A CN201810381005A CN108412603A CN 108412603 A CN108412603 A CN 108412603A CN 201810381005 A CN201810381005 A CN 201810381005A CN 108412603 A CN108412603 A CN 108412603A
- Authority
- CN
- China
- Prior art keywords
- combustion chamber
- piston
- toroidal
- basin type
- shallow basin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 118
- 239000000295 fuel oil Substances 0.000 claims abstract description 23
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 230000007704 transition Effects 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 5
- 238000004033 diameter control Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract 3
- 230000006872 improvement Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
-
- 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
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- 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
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 present invention relates to internal-combustion engine technology scheme and construction applications, specially a kind of piston combustion chamber structure, shallow basin type combustion chamber including top, the toroidal combustion chamber of lower part, the two is combined by the position of fuel injector position and oily line, and shallow basin type combustion chamber is connected with conical surface δ angles with shallow basin type combustion chamber with conical surface β angled transitions to toroidal combustion chamber, toroidal combustion chamber aperture, between transition region close up, distance h of the fuel oil injector beam center apart from piston-top surface is controlled in 1.1mm 1.5mm.The ingenious combination of shallow basin type combustion chamber and the combustion chambers ω, the advantages of having played shallow basin type combustion chamber and the combustion chambers ω and strong point.The present invention, which enters between the fuel oil in cylinder and the fresh air entered in cylinder, reaches expected mixed effect and requirement, with the rate and temperature of control burning, reaches the discharge capacity of control nitrogen oxides and PM particles.
Description
Technical field
The present invention relates to a kind of novel piston combustion bowl technical solutions, are used for the diesel oil of state five and the above emission regulation
The piston combustion chamber structure of machine designs, and being mutually matched between fuel injector belongs to internal-combustion engine technology scheme and construction applications, has
Body is a kind of piston combustion chamber structure.
Background technology
In recent years, due to the raising of engine technology level, performance indicator is continually strengthened, and reliability is promoted, emission request
It is increasingly tighter.The mixing and burning of fuel oil and fresh momentum, directly affect the discharge of engine, performance, fuel oil consumption, noise, can
By all various aspects of property.
With the development and progress of society, requirement of the mankind to living environment and air quality is higher and higher, and country is to big
The regulation of makings amount constantly becomes tight, higher and higher to the discharge index and cost-effectiveness requirement of internal combustion engine.Internal-combustion engine technology is not yet
Disconnected development, the power per liter of engine are also continuously improved, this is just to the discharge of engine, reliability, noise requirements and later maintenance
It is proposed baptism.Piston is the important movement parts of engine, is the basic component of engine, and piston and its combustion chamber are direct
Affect discharge, service life, economy and the noise level of engine.
Most of engine piston combustion chambers use toroidal combustion chamber, disadvantage：Intake swirl is too strong, in the very short time
Interior, the fuel oil oil beam that fuel injector sprays mixes unevenness with fresh air, and burning is insufficient, and burning is not easy to control in a certain range
System causes the discharge capacitys such as NOx, PM to increase, and fuel oil consumption rises.Toroidal combustion chamber aperture, shape mutation, and in ablaze
High-temperature area easily causes the cracking of piston toroidal combustion chamber aperture part.
Invention content
It is existing in the prior art it is an object of the invention to overcome the shortcomings of, a kind of piston combustion chamber structure is provided,
It is characterized in that, include the shallow basin type combustion chamber of piston, top, the toroidal combustion chamber of lower part, the two passes through fuel injector position and oil
The position of line is combined,
Shallow basin type combustion chamber is with conical surface β angled transitions to toroidal combustion chamber, and toroidal combustion chamber aperture is with conical surface δ angles and shallow basin type
Combustion chamber be connected, between transition region close up, fillet nature transition；Distance h control of the fuel oil injector beam center away from piston-top surface
In 1.1mm-1.5mm.
Further improvement of these options, shallow basin type combustion chamber aperture diameter of phi a, Φ a controls are in 62mm- 66mm, combustion
Room bottom roundings ra is burnt, ra controls are controlled in 1mm-2mm, aperture fillet rc, rc in 0.1mm-0.5mm；
The orifice diameter Φ b of toroidal combustion chamber, orifice diameter control in 50mm- 53mm, toroidal combustion chamber aperture to piston-top surface
Distance H2, control in 4.5mm-6.5mm；Bottom of combustion chamber fillet rb is 5mm-7mm；
The ratio between the combustion chambers ω aperture diameter of phi b and shallow basin type combustion chamber aperture diameter of phi a are 78%-82%.
Further improvement of these options, toroidal combustion chamber base diameter Φ c, Φ c are controlled in Φ 52mm- Φ 56mm；
Depth H 1 is 14mm-18mm；
The diameter ratio Φ b/ Φ c of the orifice diameter Φ b and toroidal combustion chamber base diameter Φ c of toroidal combustion chamber are controlled in 93%-
96%；The angle of δ is 22 ° -25 °
Cone angle gamma is 117 ° -120 ° at the top of toroidal combustion chamber's boss, and the top surface distance H3 at boss top to piston is 4.5mm-
6.5mm。
Further improvement of these options, using distance h of the fuel oil injector beam center away from piston-top surface as z-axis coordinate side
To using cylinder holes center and crankshaft center intersection point as plane datum points, M, N line are in vertically and horizontally symmetrical in piston vertical view
Heart line；P, Q lines are the vertically and horizontally symmetrical center line in the vertical view of combustion chamber；W points are that fuel oil injector beam center is bowed in piston
Subpoint in view, the x-axis offset for being located at P, Q line intersection point are a, and the offset of y-axis is b, a 3.5mm-4.5mm, b
For 0.8mm-1.2mm.
Further improvement of these options, the oily line drop point height H of fuel injector, H is in 5mm-7mm；Oily line length L, L are controlled
System is in 21mm-24mm；Fuel injector angle α, ranging from 78 ° -80 ° of angle α.
The present invention has the following advantages：
The present invention is the ingenious combination of shallow basin type combustion chamber and the combustion chambers ω, has played the excellent of shallow basin type combustion chamber and the combustion chambers ω
Point and strong point.Shallow basin type burner port diameter of phi 62mm- Φ 66mm avoid oily beam low-priced and are mixed to caused by cylinder wall and piston-top surface
It closes and burns uneven, cause NOx and PM（Particle）Discharge value increase, top fillet 0.1mm-0.5mm, combustion chamber aperture circle
Angle 0.1mm-0.5mm, bottom roundings 1mm-2mm reduce thermal stress, top land are avoided to crack, and part can form vortex again, have
Help be ejected into the fuel oil in cylinder and enters the mixing and burning between the fresh air in cylinder.
The combustion chambers ω of the present invention orifice diameter is 78%-82%, ω combustion chamber holes with shallow basin type combustion chamber aperture diameter ratio
Mouth the ratio between diameter and base diameter 93%-96% makes to enter the fuel oil in cylinder and enter in cylinder to control the intensity of intake swirl
Reach expected mixed effect and requirement between fresh air, with the rate and temperature of control burning, reaches control NOx and PM
（Particle）Discharge capacity.
The present invention controls fuel oil injector line drop point in the combustion chambers ω, according to piston-top surface in the position of 5mm-7mm, ω burnings
Indoor chamber cone angle is 117 ° -120 °, is matched with fuel injector angle, ω combustion-chamber depths 14mm-18mm, ω bottom of combustion chamber is with circle
Angle 5mm-7mm transition.Combustion chamber, oily line position and drop point, intake swirl three are effectively combined, in the effect of intake swirl
Under, oily beam in the combustion chamber and the uniform mixing and burning of fresh air effectively control NOx, PM（Particle）Discharge capacity,
Reduce fuel oil consumption and combustion noise.
Description of the drawings
Fig. 1 is the front view of the present invention.
Fig. 2 is the vertical view of piston-top surface.
Fig. 3 is the A-A sectional views of Fig. 2.
Specific implementation mode
With reference to specific attached drawing, the invention will be further described.
As shown in Figs. 1-3, a kind of piston combustion chamber structure, which is characterized in that a kind of piston combustion chamber structure is provided, it is special
Sign is, including piston 1, the center line of piston as shown in Figure 1, top shallow basin type combustion chamber 2, on piston motion is gone upward to
Near stop, prevent oil spout from splashing cylinder wall and piston-top surface；Top is shallow basin type combustion chamber, in suction stroke, shallow basin type
Tumble flow is formed around combustion chamber, helps mixing and burning, and the fillet R in shallow basin type combustion chamber aperture and bottom effectively avoids heat from answering
Power.
The toroidal combustion chamber 4 of lower part, the two are combined by the position of 3 position of fuel injector and oily line, the fuel injector
Fuel injector center line mark in center line such as Fig. 1；
Top and the bottom combustion chamber common centerline, as shown in the combustion chamber centerline in Fig. 1；
Shallow basin type combustion chamber 2 is with conical surface β angled transitions to toroidal combustion chamber, and 4 aperture of toroidal combustion chamber is with conical surface δ angles and shallow basin
Type combustion chamber 2 be connected, between transition region close up, fillet nature transition；Gas flow rate increases, and forms stronger vortex, strengthens
Mixing and fully burning, reduce PM in combustion process（Particle）With the discharge capacity of NOx etc., fuel oil consumption is reduced；
Distance controlling 1.1mm-1.5mm of the fuel oil injector beam center apart from 1 top surface of piston.
Further improvement of these options, the significant dimensions of piston combustion bowl, the position pair with fuel oil injector line drop point
It should and match, matched with air intake duct intake swirl, form stronger vortex, strengthen mixing and burning.
Specifically, 2 orifice diameter Φ a, Φ a of shallow basin type combustion chamber is controlled in 62mm- 66mm, bottom of combustion chamber fillet ra,
Ra controls are controlled in 1mm-2mm, aperture fillet rc, rc in 0.1mm-0.5mm；
The orifice diameter Φ b of toroidal combustion chamber 4, orifice diameter control in 50mm- 53mm, toroidal combustion chamber aperture to piston top
The distance H2 in face is controlled in 4.5mm-6.5mm；Bottom of combustion chamber fillet rb is 5mm-7mm；
2 bottom of shallow basin type combustion chamber is smoothly transitted into lower part toroidal combustion chamber 4 with the β angle conical surfaces, and β angles are 24 ° -27 °；
The aperture of toroidal combustion chamber 4 is 22 ° -25 ° with the δ angle conical surfaces, δ angles, is connected with 2 bottom of shallow basin type combustion chamber, between
Rounding off；
The ratio between the combustion chambers ω aperture diameter of phi b and shallow basin type combustion chamber aperture diameter of phi a are 78%-82%.Form suitable vortex
Intensity effectively mixes conducive to mist of oil with fresh air, controls burn rate to a certain extent, reduce harmful substance PM particles and
The discharge value of pernicious gas NOx；
Further improvement of these options, 4 base diameter Φ c, Φ c controls of toroidal combustion chamber are in Φ 52mm- Φ 56mm；Depth
H1 is 14mm-18mm；
The diameter ratio Φ b/ Φ c of the orifice diameter Φ b and 4 base diameter Φ c of toroidal combustion chamber of toroidal combustion chamber 4 are controlled in 93%-
96%；The angle of δ is 22 ° -25 °
Cone angle gamma is 117 ° -120 ° at the top of toroidal combustion chamber's boss, and the top surface distance H3 at boss top to piston 1 is 4.5mm-
6.5mm。
As shown in Fig. 2, for the vertical view of piston-top surface, wherein with distance h of the fuel oil injector beam center away from 1 top surface of piston
For z-axis coordinate direction, using cylinder holes center and crankshaft center intersection point as plane datum points, M, N line are vertical in piston vertical view
With horizontal symmetrical center line；P, Q lines are the vertically and horizontally symmetrical center line in the vertical view of combustion chamber.W points are fuel oil injector beam
Subpoint of the center in piston vertical view, the x-axis offset that subpoint W is located at P, Q line intersection point are a, and the offset of y-axis is b,
A is 3.5mm-4.5mm, b 0.8mm-1.2mm.Combustion chamber center is according to different types, the intersecting point coordinate of P, Q line（C, d）
Have difference.
Further improvement of these options, layout and matching of the combustion chamber with fuel injector position.It is to realize engine
Energy index, the key for meeting emission limit.
Specifically, the oily line drop point height H of fuel injector 3, H is in 5mm-7mm；Oily line length L, L are controlled in 21mm-24mm；
Fuel injector angle α, ranging from 78 ° -80 ° of angle α.
The matching of further improvement of these options, combustion chamber, fuel oil injector beam arrangement, intake swirl three combines.
Under the action of intake swirl, oily beam in the combustion chamber and the uniform mixing and burning of fresh air, effectively control NOx,
PM（Particle）Discharge capacity, reduce fuel oil consumption and combustion noise.
In the present invention, fuel injector position is directly related to position and the drop point of oily line, and the embodiment above makes each oily line
Chord length between length and each oily line is substantially impartial, in the effect of intake swirl, ensure that the fuel oil of injection is uniformly mixed with air
It closes, catch fire and burns, effectively reduce NOx emission and PM discharges.
It should be noted last that the above specific implementation mode is merely illustrative of the technical solution of the present invention and unrestricted,
Although being described the invention in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit of the technical scheme of the invention and range, should all cover
In the scope of the claims of the present invention.
Claims (5)
1. piston combustion chamber structure, which is characterized in that including piston（1）, top shallow basin type combustion chamber（2）, the ω types of lower part
Combustion chamber（4）, the two passes through fuel injector（3）Position and the position of oily line are combined；
Shallow basin type combustion chamber（2）With conical surface β angled transitions to toroidal combustion chamber, toroidal combustion chamber（4）Aperture with conical surface δ angles with
Shallow basin type combustion chamber（2）Linking, between transition region close up, fillet nature transition；Fuel oil injector beam center is pushed up away from piston (1)
The distance h in face is controlled in 1.1mm-1.5mm.
2. piston combustion chamber structure as described in claim 1, it is characterised in that：
Shallow basin type combustion chamber（2）Orifice diameter Φ a, Φ a controls exist in 62mm- 66mm, bottom of combustion chamber fillet ra, ra control
1mm-2mm, aperture fillet rc, rc are controlled in 0.1mm-0.5mm；
Toroidal combustion chamber（4）Orifice diameter Φ b, orifice diameter control in 50mm- 53mm, toroidal combustion chamber aperture to piston
The distance H2 of top surface is controlled in 4.5mm-6.5mm；Bottom of combustion chamber fillet rb is 5mm-7mm；
Shallow basin type combustion chamber（2）Bottom is smoothly transitted into lower part toroidal combustion chamber with the β angle conical surfaces（4）, β angles are 24 ° -27 °；
The ratio between the combustion chambers ω aperture diameter of phi b and shallow basin type combustion chamber aperture diameter of phi a are 78%-82%.
3. piston combustion chamber structure as described in claim 1, it is characterised in that：Toroidal combustion chamber（4）Base diameter Φ c, Φ c
Control is in Φ 52mm- Φ 56mm；Depth H 1 is 14mm-18mm；
Toroidal combustion chamber（4）Orifice diameter Φ b and toroidal combustion chamber（4）The diameter ratio Φ b/ Φ c controls of base diameter Φ c exist
The angle of 93%-96%, δ are 22 ° -25 °；
Cone angle gamma is 117 ° -120 ° at the top of toroidal combustion chamber's boss, to piston at the top of boss（1）Top surface distance H3 be 4.5mm-
6.5mm。
4. piston combustion chamber structure as described in claim 1, it is characterised in that：With fuel oil injector beam center away from piston（1）Top
The distance h in face is z-axis coordinate direction, and using cylinder holes center and crankshaft center intersection point as plane datum points, M, N line are piston vertical view
In vertically and horizontally symmetrical center line；P, Q lines are the vertically and horizontally symmetrical center line in the vertical view of combustion chamber；W points are spray
Subpoint of the oily device oil beam center in piston vertical view, the x-axis offset for being located at P, Q line intersection point are a, the offset of y-axis
For b, a 3.5mm-4.5mm, b 0.8mm-1.2mm.
5. piston combustion chamber structure as described in claim 1, it is characterised in that：Fuel injector（3）Oily line drop point height H, H exists
5mm-7mm；Oily line length L, L are controlled in 21mm-24mm；Fuel injector angle α, ranging from 78 ° -80 ° of angle α.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381005.1A CN108412603B (en) | 2018-04-25 | 2018-04-25 | Piston combustion chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381005.1A CN108412603B (en) | 2018-04-25 | 2018-04-25 | Piston combustion chamber structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108412603A true CN108412603A (en) | 2018-08-17 |
| CN108412603B CN108412603B (en) | 2023-12-05 |
Family
ID=63136564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810381005.1A Active CN108412603B (en) | 2018-04-25 | 2018-04-25 | Piston combustion chamber structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108412603B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894727A (en) * | 2020-06-29 | 2020-11-06 | 东风商用车有限公司 | Four-valve direct-injection diesel engine combustion chamber |
| CN113090379A (en) * | 2021-04-29 | 2021-07-09 | 广西玉柴机器股份有限公司 | Layered gas engine combustion chamber and vortex rotation center processing method |
| CN114320641A (en) * | 2022-03-11 | 2022-04-12 | 潍柴动力股份有限公司 | Engine combustion system, control method and engine |
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| EP1643098A1 (en) * | 2004-10-04 | 2006-04-05 | Renault s.a.s. | Off-centered fuel injection nozzle for automotive combustion engine |
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| CN105909420A (en) * | 2016-06-14 | 2016-08-31 | 广西玉柴机器股份有限公司 | Combustion chamber capable of reducing soot in diesel engine cylinder |
| CN208184837U (en) * | 2018-04-25 | 2018-12-04 | 江苏四达动力机械集团有限公司 | Piston combustion chamber structure |
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2018
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| EP1643098A1 (en) * | 2004-10-04 | 2006-04-05 | Renault s.a.s. | Off-centered fuel injection nozzle for automotive combustion engine |
| CN101160459A (en) * | 2005-04-19 | 2008-04-09 | 洋马株式会社 | Direct injection diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894727A (en) * | 2020-06-29 | 2020-11-06 | 东风商用车有限公司 | Four-valve direct-injection diesel engine combustion chamber |
| CN113090379A (en) * | 2021-04-29 | 2021-07-09 | 广西玉柴机器股份有限公司 | Layered gas engine combustion chamber and vortex rotation center processing method |
| CN114320641A (en) * | 2022-03-11 | 2022-04-12 | 潍柴动力股份有限公司 | Engine combustion system, control method and engine |
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| Publication number | Publication date |
|---|---|
| CN108412603B (en) | 2023-12-05 |
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