CN101705881A - Rapid combustor of airflow hedging natural gas engine - Google Patents
Rapid combustor of airflow hedging natural gas engine Download PDFInfo
- Publication number
- CN101705881A CN101705881A CN200910073221A CN200910073221A CN101705881A CN 101705881 A CN101705881 A CN 101705881A CN 200910073221 A CN200910073221 A CN 200910073221A CN 200910073221 A CN200910073221 A CN 200910073221A CN 101705881 A CN101705881 A CN 101705881A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- combustor
- gas engine
- shallow
- piston
- 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.)
- Pending
Links
Images
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention provides a rapid combustor of an airflow hedging lean-burn natural gas engine. The combustor is positioned on the top part of a piston, and the shape of the combustor is necking shallow ampullaceous; a circular groove is arranged on the top part of the piston; the circular groove is communicated with the shallow ampullaceous combustor through four uniformly distributed chutes; when the piston is close to a compression upper dead center, the airflow is erupted out at a high speed from the circular groove through the chutes and hits against with the rotating vortex formed in the intake process to damage the vortex structure in the shallow ampullaceous combustor and increase turbulent kinetic energy in a cylinder, thereby enabling the natural gas engine to generate rapid combustion, expanding stable operational lean-burn limit of the engine, and improving the dynamic property, economical efficiency and emission performance of the engine.
Description
(1) technical field
The present invention relates to technical field of engines, be specifically related to a kind of air-flow formula lean burn natural gas engine rapid combustion chamber that liquidates.
(2) background technique
The gas-fueled vehicles that become increasingly conspicuous to aboundresources and combustion cleaning of energy shortage and environmental pollution problem bring wide opportunity to develop, the natural gas engine Study on Technology are become the focus of current automobile industry research.
The natural gas engine lean burn technology not only can be improved the motor fuel Economy, and can reduce exhaust emissions.But along with the lean out rate of burning reduces rapidly, particularly natural gas engine kindling temperature height, velocity of propagation of flame are slow, along with lean out, whole firing duration increases, require to increase ignition advance angle, but can cause tendency to detonate and HC discharging to increase, therefore if will further improve the lean burn natural gas engine performance, it is crucial improving engine combustion speed.
Combustion-chamber shape is one of greatest factor that influences the spark ignition engine rate of burning, optimal design by chamber structure can improve before the igniting and turbulent flow level in the cylinder in the combustion process, thereby accelerate whole flame mechanism, the rare limit of expansion lean-combustion engine stable operation.
At present also not about the liquidate report of formula rapid combustion chamber of natural gas engine of air-flow.
(3) summary of the invention
The object of the present invention is to provide a kind of fire chamber of natural gas engine, the air-flow that promptly can realize rapid combustion, the expansion motor stable operation rare limit formula rapid combustion chamber of natural gas engine that liquidates.
Technological scheme of the present invention is achieved in that the firing chamber is positioned at piston head, is shaped as the shallow urniform of reducing, and promptly the firing chamber is up-thin-low-thick, and section is similar to jar, at piston head one annular groove is arranged, and annular groove communicates with shallow urniform firing chamber by uniform skewed slot.
The present invention can also comprise:
1, the angle between described skewed slot center line and the piston-top surface center line is 45 °.
2, described skewed slot is four.
This natural gas engine is the single-fuel natural gas engine of developing on the diesel engine basis, former diesel engine cylinder cover general structure does not make an amendment, the oil injector hole outlet is positioned at the cylinder center, in the transformation process mounting hole of oil sprayer is processed as spark plug mounting hole, the compression ratio that designs motor by piston crown is decided to be 11, with three-dimensional CFD emulation and experimental study is that means are optimized and estimate the fire chamber of natural gas engine structure, proposes a kind of air-flow that is suitable for lean burn natural gas engine formula rapid combustion chamber that liquidates on the basis of The experimental results.The air-flow formula rapid combustion chamber of natural gas engine that liquidates, realized squeezing in the cylinder effective coupling of stream and eddy current, increased the tubulence energy near the cylinder of top dead center, natural gas engine is produced stablize rapid combustion, accelerate whole chemical reaction course, the rare limit of expansion motor stable operation, thus natural gas engine power character, Economy and emission performance improved.
(4) description of drawings
Fig. 1 is the air-flow formula lean burn natural gas engine rapid combustion cell structure that liquidates.
Fig. 2 is the liquidate plan view of formula lean burn natural gas engine rapid combustion cell structure of air-flow.
(5) embodiment
Further specify the present invention below in conjunction with accompanying drawing.
1 piston crown annular groove external diameter among Fig. 1,2 shallow urniform firing chamber diameters, 3 shallow urniform firing chamber reentrant diameters, 4 shallow urniform firing chamber reducing place fillets, 5 near firing chamber reducing place fillet, bottom, 6 firing chambers fillet, the 7 piston head annular groove degree of depth, the 8 firing chamber reducing degree of depth, 9 combustion-chamber depths.10 piston crown annular groove internal diameters among Fig. 2,11 skewed slot width, 12 skewed slot center line angles.
In conjunction with the formula lean burn natural gas engine firing chamber that liquidates of air-flow among Fig. 1 and Fig. 2, the firing chamber is positioned at piston head, be shaped as the shallow urniform of reducing, physical dimension is as follows: burning chamber diameter 2 is 100mm, and reentrant diameter 3 is 90mm, and the reducing degree of depth 8 is 4mm, combustion-chamber depth 9 is 22.5～23mm, bottom, firing chamber fillet radius 6 is 7mm, is 7mm near reducing place fillet radius 5, and reducing place fillet radius 4 is 2mm; There is an annular groove at piston head, annular groove external diameter 1 is 125mm, internal diameter 10 is 102mm, the annular groove degree of depth 7 is 2～3mm, annular groove communicates with shallow urniform firing chamber by four uniform skewed slots, skewed slot width 11 is 8.5mm, and the degree of depth is identical with the annular groove degree of depth 7, and the angle between skewed slot center line and the piston center line is 45 °.Because the intake duct of former diesel engine is shaped as spirality, formed eddy current in experience air inlet and the compression stroke cylinder as the rotation of A direction, along with piston moves closer to top dead center, eddy current is squeezed into shallow urniform firing chamber, and with the form high speed rotating of rigid vortex, when chamber structure not being optimized, near the crowded stream that forms the top dead center around the piston squish gap to cylinder center flow at high speed, this not only makes the heat radiation of initial stage fire nuclear increase, be unfavorable for the development of initial stage fire nuclear, and eddy current lateral impact in crowded stream and the firing chamber, fail to make full use of the kinergety of squeezing stream and eddy current, and in this patent when piston during near compression top center, air-flow sprays from the annular groove high speed through skewed slot 11, with the eddy current emission head-on collision in the urniform firing chamber, large scale eddy current in the cylinder is changed into small scale turbulence, increased tubulence energy in the cylinder, quickened the flame propagation of natural gas engine, shortened whole chemical reaction course, expand the rare limit of natural gas engine stable operation, thereby improved engine power performance, Economy and emission performance.
Claims (3)
1. air-flow formula rapid combustion chamber of natural gas engine that liquidates, it is characterized in that: the firing chamber is positioned at piston head, is shaped as the shallow urniform of reducing, be that the firing chamber is up-thin-low-thick, section is similar to jar, at piston head one annular groove is arranged, and annular groove communicates with shallow urniform firing chamber by uniform skewed slot.
2. the air-flow according to claim 1 formula rapid combustion chamber of natural gas engine that liquidates, it is characterized in that: the angle between described skewed slot center line and the piston-top surface center line is 45 °.
3. the air-flow according to claim 1 and 2 formula rapid combustion chamber of natural gas engine that liquidates, it is characterized in that: described skewed slot is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910073221A CN101705881A (en) | 2009-11-17 | 2009-11-17 | Rapid combustor of airflow hedging natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910073221A CN101705881A (en) | 2009-11-17 | 2009-11-17 | Rapid combustor of airflow hedging natural gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101705881A true CN101705881A (en) | 2010-05-12 |
Family
ID=42376127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910073221A Pending CN101705881A (en) | 2009-11-17 | 2009-11-17 | Rapid combustor of airflow hedging natural gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101705881A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033235A (en) * | 2014-06-23 | 2014-09-10 | 天津大学 | Novel rapid combustor of natural gas engine |
| CN104271916A (en) * | 2012-04-13 | 2015-01-07 | 卡特彼勒能源方案有限公司 | Piston of an internal combustion engine |
-
2009
- 2009-11-17 CN CN200910073221A patent/CN101705881A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104271916A (en) * | 2012-04-13 | 2015-01-07 | 卡特彼勒能源方案有限公司 | Piston of an internal combustion engine |
| CN104033235A (en) * | 2014-06-23 | 2014-09-10 | 天津大学 | Novel rapid combustor of natural gas engine |
| CN104033235B (en) * | 2014-06-23 | 2016-08-24 | 天津大学 | A kind of novel natural gas engine rapid combustion chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202280529U (en) | Combustion system | |
| CN113669152B (en) | Gasoline engine ignition mechanism comprising strong tumble precombustion chamber | |
| CN102322332A (en) | Combustion chamber structure of CNG (Compressed Natural Gas) engine and fuel injection method thereof | |
| KR101366424B1 (en) | Combustion bowl shape of direct injection diesel engine for reducing the soot emission | |
| CN107355297B (en) | Engine combustion chamber suitable for gasoline fuel combustion instead of diesel engine | |
| CN203434439U (en) | Spark plug and spark-plug-using igniting system of internal combustion engine | |
| CN101705881A (en) | Rapid combustor of airflow hedging natural gas engine | |
| CN104405496A (en) | Natural gas engine pre-combustion chamber type gas supply device | |
| CN105937462A (en) | Direct injection vortex piston top combustion chamber | |
| CN115898622A (en) | Combustion chamber beneficial to improving heat efficiency of engine | |
| CN212563446U (en) | Medium-heavy ignition engine combustion chamber | |
| CN2797648Y (en) | Parallel symmetry double spark plug combustion chamber | |
| CN201007242Y (en) | Motorcycle engine piston used for spherical-segment combustion chamber | |
| CN204283600U (en) | A kind of natural gas engine precombustion air feeder | |
| CN201874719U (en) | Internal-combustion engine with multiple spark plugs in one cylinder | |
| CN104727924A (en) | Gasoline engine combustion chamber with different combustion regions | |
| CN201363194Y (en) | Parallel, symmetrical, double-spark plug and dish combustion chamber | |
| CN203614208U (en) | Gasoline engine combustion chamber with function of partition combustion | |
| CN200975293Y (en) | Gas engine gas piston burning chamber | |
| CN202946256U (en) | Piston for natural gas engine | |
| CN110886647B (en) | Gasoline engine combustion chamber and automobile | |
| CN106640337A (en) | Anticlockwise-tumble-ratio combustion system for automotive engine | |
| JP2018162727A (en) | Spark ignition type internal combustion engine | |
| CN201173150Y (en) | Four stroke gas engine rapid combustion system | |
| CN112814804A (en) | Gasoline engine and combustion chamber thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100512 |