CN209277992U - A kind of gaseous propellant engine piston combustion bowl - Google Patents
A kind of gaseous propellant engine piston combustion bowl Download PDFInfo
- Publication number
- CN209277992U CN209277992U CN201822209105.4U CN201822209105U CN209277992U CN 209277992 U CN209277992 U CN 209277992U CN 201822209105 U CN201822209105 U CN 201822209105U CN 209277992 U CN209277992 U CN 209277992U
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- CN
- China
- Prior art keywords
- piston
- cylinder
- combustion chamber
- squish flow
- combustion
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- 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.)
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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
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model discloses a kind of gaseous propellant engine piston combustion bowl, including piston and cylinder, piston is mounted in cylinder and moves up and down；The combustion chamber is set to the top of piston, and shape is the structure gradually tapered up that is open to piston-top surface, and bottom surface is plane or spherical surface hill；With radius R transition between the side lower and bottom surface of the combustion chamber, with radius r transition between side surface upper part and piston upper surface, the R is greater than r.The utility model uses the relatively Rouno Cormer Pregrinding Wheel of combustion chamber bottom surface and side, promote fuel and air uniformly mix and burning tissues；The squish flow of 50%-65% is conducive to optimize in-cylinder combustion tissue, reduces discharge, improve engine performance than guaranteeing to have stronger squish flow to act between piston-top surface and cylinder cap.
Description
Technical field
The utility model relates to a kind of engine piston combustion chambers, fire more particularly, to a kind of gaseous propellant engine piston
Room is burnt, technical field of engines is belonged to.
Background technique
Engine piston combustion chamber shape has a great impact to In Cylinder Flow, and In Cylinder Flow is to burning group
The process of knitting has conclusive effect, and then influences the performance and exhaust gas discharge of engine, as emission request constantly upgrades, for
The gaseous propellant engine much developed on the basis of diesel engine only simply increases piston combustion bowl volume, reduces compression ratio
It is not able to satisfy the engine emission and performance requirement of high standard.
Summary of the invention
Technical problem to be solved in the utility model is in view of the defects existing in the prior art, to provide and a kind of meet high standard
Quasi- engine emission and the design of the piston combustion bowl of performance.
In order to solve this technical problem, the utility model provides a kind of gaseous propellant engine piston combustion bowl, including
Piston and cylinder, piston are mounted in cylinder and move up and down；The combustion chamber is set to the top of piston, and shape is to piston
The structure that top surface opening gradually tapers up, bottom surface are plane or spherical surface hill；Between the side lower and bottom surface of the combustion chamber
With radius R transition, with radius r transition between side surface upper part and piston upper surface, the R is greater than r.
Difference between the R and r between 4~10,
The region that the top surface of the piston removes combustion chamber openings is squish flow face, the area and cylinder bore in the squish flow face
Corresponding area ratio is squish flow ratio, and the squish flow ratio is between 50%-65%.
The utility model has the advantages that relatively Rouno Cormer Pregrinding Wheel of the utility model using combustion chamber bottom surface and side, promotion fuel and air is equal
Even mixing and burning tissues；The squish flow of 50%-65% is than guaranteeing to have stronger squish flow to act between piston-top surface and cylinder cap, favorably
In optimization in-cylinder combustion tissue, discharge is reduced, improves engine performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the A of the utility model Fig. 1 to schematic diagram.
In figure: 1 combustion chamber, 2 pistons, 3 cylinders, 4 squish flow faces.
Specific embodiment
The utility model is specifically described with reference to the accompanying drawings and embodiments.
Fig. 1 show the structural schematic diagram of the utility model.
Fig. 2 show the A of the utility model Fig. 1 to schematic diagram.
The utility model provides a kind of gaseous propellant engine piston combustion bowl, including piston 2 and cylinder 3, and piston 2 is pacified
It moves up and down in cylinder 3, the combustion chamber 1 is set to the top of piston 2.
The shape of the combustion chamber 1 is the structure gradually tapered up that is open to 2 top surface of piston, and bottom surface is that plane or spherical surface are convex
It rises.
With radius R transition between the side lower and bottom surface of the combustion chamber 1, between 2 upper surface of side surface upper part and piston
With radius r transition, the R is greater than r；The relatively Rouno Cormer Pregrinding Wheel of 1 bottom surface of combustion chamber and side transports gaseous mixture in 1 inward eddy of combustion chamber
It is dynamic, form compression swirl.
Difference between the R and r is directed in piston combustion room between 4~10 convenient for gaseous mixture, accelerates flame
Spread speed realizes conflagration.
It is squish flow face 4, the area and cylinder in the squish flow face 4 that the top surface of the piston 2, which removes the region that combustion chamber 1 is open,
The corresponding area ratio of 3 diameters is squish flow ratio, and the squish flow ratio is between 50%-65%；The squish flow ratio of this range can guarantee
There is stronger squish flow to act between the top surface and cylinder cap of piston 2.
The working principle and the course of work of the utility model:
When compression piston 2 moves upwards, 1 bottom surface of combustion chamber makes to mix the utility model with the relatively Rouno Cormer Pregrinding Wheel of side
Gas is moved in 1 inward eddy of combustion chamber, forms compression swirl, further promote fuel and air uniformly mix and burning tissues.
There is stronger squish flow to act between top surface and cylinder cap of the squish flow than that can guarantee piston 2 between 50%-65%, so that combustion chamber
The stronger air motion of mixed Daqu in 1 improves rate of flame propagation, promotes the quick full combustion of gaseous mixture, reduces combustion
Cyclical variations are burnt, to reduce engine row temperature and exhaust gas discharge.
The utility model is conducive to optimize in-cylinder combustion tissue, reduces discharge, improves engine performance.
The utility model the embodiment above, is merely illustrative, be not it is only, it is all in the scope of the utility model
Or the change in equivalent the scope of the utility model is surrounded by the utility model.
Claims (3)
1. a kind of gaseous propellant engine piston combustion bowl, including piston (2) and cylinder (3), piston (2) are mounted on cylinder (3)
Interior up and down motion, it is characterised in that: the combustion chamber (1) is set to the top of piston (2), and shape is to piston (2) top surface
Be open the structure gradually tapered up, and bottom surface is plane or spherical surface hill；Between the side lower and bottom surface of the combustion chamber (1) with
Radius R transition, with radius r transition between side surface upper part and piston (2) upper surface, the R is greater than r.
2. gaseous propellant engine piston combustion bowl according to claim 1, it is characterised in that: the difference between the R and r
Value is between 4~10.
3. gaseous propellant engine piston combustion bowl according to claim 1 or 2, it is characterised in that: the piston (2)
The region that top surface removes combustion chamber (1) opening is squish flow face (4), and the area of the squish flow face (4) is corresponding with cylinder (3) diameter
Area ratio is squish flow ratio, and the squish flow ratio is between 50%-65%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822209105.4U CN209277992U (en) | 2018-12-27 | 2018-12-27 | A kind of gaseous propellant engine piston combustion bowl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822209105.4U CN209277992U (en) | 2018-12-27 | 2018-12-27 | A kind of gaseous propellant engine piston combustion bowl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209277992U true CN209277992U (en) | 2019-08-20 |
Family
ID=67607500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822209105.4U Active CN209277992U (en) | 2018-12-27 | 2018-12-27 | A kind of gaseous propellant engine piston combustion bowl |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209277992U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502819A (en) * | 2020-04-28 | 2020-08-07 | 东风商用车有限公司 | Necking combustion chamber |
-
2018
- 2018-12-27 CN CN201822209105.4U patent/CN209277992U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502819A (en) * | 2020-04-28 | 2020-08-07 | 东风商用车有限公司 | Necking combustion chamber |
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| GR01 | Patent grant |