CN208184837U - Piston combustion chamber structure - Google Patents
Piston combustion chamber structure Download PDFInfo
- Publication number
- CN208184837U CN208184837U CN201820600757.8U CN201820600757U CN208184837U CN 208184837 U CN208184837 U CN 208184837U CN 201820600757 U CN201820600757 U CN 201820600757U CN 208184837 U CN208184837 U CN 208184837U
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- Prior art keywords
- combustion chamber
- piston
- toroidal
- basin type
- shallow basin
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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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- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model 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 angle with shallow basin type combustion chamber with conical surface β angled transition 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 chamber ω, the advantages of having played shallow basin type combustion chamber and the combustion chamber ω and strong point.The utility model, which enters between the fuel oil in cylinder and the fresh air entered in cylinder, reaches expected mixed effect and requirement, to control the rate and temperature of burning, reaches the discharge amount of control nitrogen oxides and PM particle.
Description
Technical field
The utility model relates to a kind of novel piston combustion bowl technical solution, it to be used for state five and the above emission regulation
The piston combustion chamber structure of diesel engine designs, being mutually matched between fuel injector, belongs to internal-combustion engine technology scheme and structure neck
Domain, specially a kind of piston combustion chamber structure.
Background technique
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 sternly, 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, and 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, burns insufficient, burns also not easily-controllable in a certain range
System causes the discharge amounts 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.
Summary of the invention
The purpose of the utility model is to overcome deficiencies existing in the prior art, provide a kind of piston combustion bowl knot
Structure, which is characterized in that the shallow basin type combustion chamber including piston, top, the toroidal combustion chamber of lower part, the two pass through fuel injector position
It is combined with the position of oily line,
Shallow basin type combustion chamber is with conical surface β angled transition to toroidal combustion chamber, and toroidal combustion chamber aperture is with conical surface δ angle and shallowly
Basin shaped combustion chamber linking, between transition region close up, fillet nature transition；Distance h of the fuel oil injector beam center away from piston-top surface
Control is in 1.1mm-1.5mm.
Further improvement of these options, shallow basin type combustion chamber aperture diameter of phi a, Φ a control are in 62mm- 66mm, combustion
Room bottom roundings ra is burnt, ra control is 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
The distance H2 of top surface is controlled in 4.5mm-6.5mm；Bottom of combustion chamber fillet rb is 5mm-7mm；
The ratio between the combustion chamber 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 control of orifice diameter Φ b and toroidal combustion chamber's base diameter Φ c of toroidal combustion chamber exist
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 the top of boss to piston is
4.5mm-6.5mm。
Further improvement of these options, the distance h using fuel oil injector beam center away from piston-top surface is 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 top view
Heart line；P, Q line is the vertically and horizontally symmetrical center line in the top view of combustion chamber；W point is 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 is 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 control
System is in 21mm-24mm；Fuel injector angle α, angle α range are 78 ° -80 °.
The utility model has the advantage that
The utility model is the ingenious combination of shallow basin type combustion chamber and the combustion chamber ω, has played shallow basin type combustion chamber and ω combustion
The advantages of burning room and strong point.Shallow basin type burner port diameter of phi 62mm- Φ 66mm avoids oily beam low-priced to cylinder wall and piston-top surface
Caused mixing and burning is uneven, causes NOx and PM(particle) discharge value increase, top fillet 0.1mm-0.5mm, burning
Room aperture fillet 0.1mm-0.5mm, bottom roundings 1mm-2mm reduce thermal stress, top land are avoided to crack, and part again can shape
At vortex, helps to be ejected into the fuel oil in cylinder and enter the mixing and burning between the fresh air in cylinder.
The utility model ω combustion chamber orifice diameter and shallow basin type combustion chamber aperture diameter ratio are 78%-82%, ω burning
The ratio between room orifice diameter and base diameter 93%-96% make the fuel oil entered in cylinder and enter cylinder to control the intensity of intake swirl
Reach expected mixed effect and requirement between interior fresh air, to control the rate and temperature of burning, reach control NOx and
PM(particle) discharge amount.
The utility model controls fuel oil injector line drop point in the combustion chamber ω, according to piston-top surface in the position of 5mm-7mm, ω
Combustion chamber inner cavity cone angle is 117 ° -120 °, is matched with fuel injector angle, ω combustion-chamber depth 14mm-18mm, ω bottom of combustion chamber
With fillet 5mm-7mm transition.Combustion chamber, oily line position and drop point, intake swirl three are effectively combined, in the work 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
Amount reduces fuel oil consumption and combustion noise.
Detailed description of the invention
Fig. 1 is the main view of the utility model.
Fig. 2 is the top view of piston-top surface.
Fig. 3 is the A-A cross-sectional view of Fig. 2.
Specific embodiment
Below with reference to specific attached drawing, the utility model is described in further detail.
As shown in Figure 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
The fuel injector center line mark of center line as shown in figure 1；
Top and the bottom combustion chamber common centerline, shown in combustion chamber centerline as shown in figure 1；
Shallow basin type combustion chamber 2 with conical surface β angled transition to toroidal combustion chamber, 4 aperture of toroidal combustion chamber with conical surface δ angle with
Shallow basin type combustion chamber 2 be connected, between transition region close up, fillet nature transition；Gas flow rate increases, and forms stronger vortex,
Strengthen mixing and full combustion, reduce PM(particle in combustion process) and NOx etc. discharge amount, reduce fuel oil and consume；
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 control is 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 work
The distance H2 of top surface is filled in, 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 surface, and β angle is 24 ° -27 °；
With the δ angle conical surface, δ angle is 22 ° -25 ° in the aperture of toroidal combustion chamber 4, is connected with 2 bottom of shallow basin type combustion chamber,
Between rounding off；
The ratio between the combustion chamber ω aperture diameter of phi b and shallow basin type combustion chamber aperture diameter of phi a are 78%-82%.It is suitable to be formed
Vortex intensity effectively mixes conducive to mist of oil with fresh air, controls burn rate to a certain extent, reduces harmful substance PM
The discharge value of grain and pernicious gas NOx；
Further improvement of these options, 4 base diameter Φ c, Φ c of toroidal combustion chamber are controlled in Φ 52mm- Φ 56mm；
Depth H 1 is 14mm-18mm；
The diameter ratio Φ b/ Φ c control of the orifice diameter Φ b and 4 base diameter Φ c of toroidal combustion chamber of toroidal combustion chamber 4 exist
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 the top of boss to piston 1 is
4.5mm-6.5mm。
As shown in Fig. 2, being the top view of piston-top surface, wherein the distance h with 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 top view
With horizontal symmetrical center line；P, Q line is the vertically and horizontally symmetrical center line in the top view of combustion chamber.W point is fuel oil injector beam
Subpoint of the center in piston top view, the x-axis offset that subpoint W is located at P, Q line intersection point is 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 (c, d) of P, Q line
Have difference.
Further improvement of these options, the layout and matching of combustion chamber and 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, angle α range are 78 ° -80 °.
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 amount, reduce fuel oil consumption and combustion noise.
In the utility model, fuel injector position is directly related to position and the drop point of oily line, and the embodiment above makes each oil
Chord length between the length of line and each oily line is substantially impartial, in the effect of intake swirl, ensure that the fuel oil of injection and air are equal
Even mixing, kindling and burning effectively reduce NOx emission and PM discharge.
It should be noted last that the above specific embodiment is only to illustrate the technical solution of the utility model rather than limits
System, although the utility model is described in detail referring to example, those skilled in the art should understand that, it can be right
The technical solution of the utility model is modified or replaced equivalently, without departing from the spirit and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (5)
1. piston combustion chamber structure, which is characterized in that the shallow basin type combustion chamber (2) including piston (1), top, the ω type of lower part
Combustion chamber (4), the two are combined by the position of fuel injector (3) position and oily line；
Shallow basin type combustion chamber (2) with conical surface β angled transition to toroidal combustion chamber, toroidal combustion chamber (4) aperture with conical surface δ angle 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 control exists in 62mm- 66mm, bottom of combustion chamber fillet ra, ra control
1mm-2mm, aperture fillet rc, rc are controlled 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
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 (4) with the β angle conical surface, and β angle is 24 ° -27 °；
The ratio between the combustion chamber 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；
The diameter ratio Φ b/ Φ c control of the orifice diameter Φ b and toroidal combustion chamber (4) base diameter Φ c of toroidal combustion chamber (4) 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, and the top surface distance H3 at the top of boss to piston (1) is 4.5mm-
6.5mm。
4. piston combustion chamber structure as described in claim 1, it is characterised in that: pushed up with fuel oil injector beam center away from piston (1)
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 top view
In vertically and horizontally symmetrical center line；P, Q line is the vertically and horizontally symmetrical center line in the top view of combustion chamber；W point is spray
Subpoint of the oily device oil beam center in piston top view, the x-axis offset for being located at P, Q line intersection point is 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: the oily line drop point height H of fuel injector (3), H exist
5mm-7mm；Oily line length L, L are controlled in 21mm-24mm；Fuel injector angle α, angle α range are 78 ° -80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820600757.8U CN208184837U (en) | 2018-04-25 | 2018-04-25 | Piston combustion chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820600757.8U CN208184837U (en) | 2018-04-25 | 2018-04-25 | Piston combustion chamber structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208184837U true CN208184837U (en) | 2018-12-04 |
Family
ID=64434984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820600757.8U Active CN208184837U (en) | 2018-04-25 | 2018-04-25 | Piston combustion chamber structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN208184837U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412603A (en) * | 2018-04-25 | 2018-08-17 | 江苏四达动力机械集团有限公司 | Piston combustion chamber structure |
| 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 |
-
2018
- 2018-04-25 CN CN201820600757.8U patent/CN208184837U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412603A (en) * | 2018-04-25 | 2018-08-17 | 江苏四达动力机械集团有限公司 | Piston combustion chamber structure |
| CN108412603B (en) * | 2018-04-25 | 2023-12-05 | 江苏四达动力机械集团有限公司 | Piston combustion chamber structure |
| 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 |
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