CN109339936A - A kind of blast groove type combustion chamber suitable for straight air flue combustion system - Google Patents
A kind of blast groove type combustion chamber suitable for straight air flue combustion system Download PDFInfo
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- CN109339936A CN109339936A CN201811279702.2A CN201811279702A CN109339936A CN 109339936 A CN109339936 A CN 109339936A CN 201811279702 A CN201811279702 A CN 201811279702A CN 109339936 A CN109339936 A CN 109339936A
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- Prior art keywords
- combustion chamber
- groove type
- air flue
- fuel injector
- plane
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Classifications
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- 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
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
-
- 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
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B23/101—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on or close to the cylinder centre axis, e.g. with mixture formation using spray guided concepts
-
- 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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
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- 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
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B2023/106—Tumble flow, i.e. the axis of rotation of the main charge flow motion is horizontal
-
- 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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- 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 provides a kind of blast groove type combustion chambers suitable for straight air flue combustion system, including combustion chamber, the shape of the combustion chamber is necking shape contour structure, water conservancy diversion inclined-plane is equipped between aditus laryngis and top surface, fillet R is equipped at the top edge on the water conservancy diversion inclined-plane, the circumferentially uniformly distributed several diversion trenches in the top surface of the combustion chamber, the diversion trench is leaf structure, the two sided of the diversion trench is equipped with a draft angle φ, the top of the combustion chamber is installed by cylinder cap, the intermediate of cylinder cap installs fuel injector, and circumferentially point row is uniformly distributed using two rows for the spray orifice arrangement of the fuel injector.Blast groove type combustion chamber of the present invention suitable for straight air flue combustion system, in the case where not changing intake method, the diffusion of squish and oily beam before and after promotion top dead centre, accelerated combustion speed, oily beam is improved to the utilization rate of air, quickly mixing and diffusion are realized, so as to improve the performance of engine.
Description
Technical field
The invention belongs to internal combustion engine mixed Daqu and combustion fields, are suitable for straight air flue burning system more particularly, to one kind
The blast groove type combustion chamber of system.
Background technique
The combustion process of internal combustion engine refers to I. C. engine oil, gas, the coefficient process in room.For diesel engine, combustion
The quality of burning process depends primarily on internal combustion oil of cylinder and mixes with air the performance of quality namely engine depending on combustion process group
The quality knitted reduces discharge to improve dynamic property and economy, needs quickly to mix and improve heat to power output using increase oil gas
The measure and method of efficiency.
Diesel engine In Cylinder Flow is considerably complicated, includes vortex, squish flow and tumble flow.Intake swirl mainly relies on whirlpool
Gas road is formed in intake process around the axial organized air motion of cylinder, and intake swirl is rubbed due to air-flow and casing wall
It wipes, interior friction can also occur between air-flow and consume, gradually decay in compression process, generally the moment of momentum in compression end of a period about 25%
It can lose.Squish flow is the air-flow that a part of gentle cylinder cap of certain of piston face generates when close to each other in compression top center
Movement, while in piston downlink, the indoor gas that burns flows out into annular space and generates the i.e. inverse squish flow of expansion flowing.Rolling
Stream is the organized air swirl formed around central axis of air cylinder line formed in intake process.Its momentum in compression process
Decay less, and be able to maintain in compression latter stage, when the piston is near the top dead centre, large scale tumble flow can be broken into many small sizes
Whirlpool increases turbulence intensity.
Promote fuel-oil atmozation most important to diesel combustion characteristic by air current composition in fuel injection processes.Work as diesel oil
When machine uses straight air flue combustion system, the multiple orifice nozzle and the suitable combustion chamber profile of matching of high injection pressure are generally used
Carry out rationalization's air-flow and realizes higher power density.It mainly utilizes profile structure enhancing squish flow in combustion chamber to accelerate mixing.Cause
This Proper Match combustion chamber and the relative position of oily beam are necessary.
Summary of the invention
In view of this, the present invention is directed to propose a kind of blast groove type combustion chamber suitable for straight air flue combustion system, with reality
Enhancing air motion promotes air-fuel mixture in existing fuel injection processes.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of blast groove type combustion chamber suitable for straight air flue combustion system, including combustion chamber, water conservancy diversion inclined-plane, cylinder cap and spray
Oily device, the shape of the combustion chamber are necking shape contour structure, and the water conservancy diversion is equipped between the aditus laryngis and top surface of the combustion chamber
Inclined-plane is equipped with fillet R, the circumferentially uniformly distributed several diversion trenches in the top surface of the combustion chamber, institute at the bottom margin on the water conservancy diversion inclined-plane
Stating diversion trench is outer thin interior deep leaf structure, and the blade center of the diversion trench is overlapped with the center of the combustion chamber, institute
The two sided for stating diversion trench is equipped with a draft angle φ, and the position that the diversion trench intersects with the water conservancy diversion inclined-plane is the water conservancy diversion
At the half position on inclined-plane, the cylinder cap is installed in the top of the combustion chamber, and the intermediate of the cylinder cap installs the fuel injector, institute
The spray orifice arrangement for stating fuel injector circumferentially divides row uniformly distributed using two rows, the central axis of the lower oil extraction beam of the fuel injector and institute
The upper oil extraction central beam axis difference 360/n degree of fuel injector is stated, wherein n is total orifice number of fuel injector.
Further, the quantity of the diversion trench is equal with the quantity of upper oil extraction beam of the fuel injector, and circumferential matching.
Further, the value range of the draft angle φ are as follows: 10 °≤φ≤25 °.
Further, the drop point site of the lower oil extraction beam of the fuel injector is the half of the combustion recess depth
Position.
Further, the inclination angle on the water conservancy diversion inclined-plane is φz, value range are as follows: 25 °≤φz≤30°。
Further, the radius of the fillet R is more than or equal to 1mm.
Further, the position of the position with the water conservancy diversion inclined-plane of the lower oil extraction beam circumferentially matches.
Compared with the existing technology, the blast groove type combustion chamber of the present invention suitable for straight air flue combustion system have with
Lower advantage:
(1) the blast groove type combustion chamber of the present invention suitable for straight air flue combustion system, is not changing intake method
In the case where, by clearance fraction and mist when promoting the diffusion, i.e. piston stroking upward of the squish and oily beam before and after top dead centre
Change can more press to combustion recess, form stronger tumble flow in combustion recess bottom, in piston downlink, due to existing
The different flow-guiding structure of the gradient is conducive to oil gas and spreads to wider space, and accelerated combustion speed substantially increases oily beam to air
Utilization rate realizes the quick mixing and diffusion of oil gas, so as to improve the performance of engine.
(2) the blast groove type combustion chamber of the present invention suitable for straight air flue combustion system, the two sided of diversion trench are set
There is a draft angle, plays the role of being oriented to air-flow convergence quickening air velocity.
(3) the blast groove type combustion chamber of the present invention suitable for straight air flue combustion system, the lower oil extraction beam of fuel injector
Drop point site be combustion recess depth half position, in this way rely on the different conical surfaces flow-guiding structure, two oil extraction beams
It can be sufficiently mixed with air, to optimize combustion process.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the positive view that the flow guiding type combustion chamber of straight air flue combustion system is applicable in described in the embodiment of the present invention；
Fig. 2 is the positive view that blast groove type combustion chamber described in the embodiment of the present invention matches spray orifice oil beam；
Fig. 3 is the top view that blast groove type combustion chamber described in the embodiment of the present invention matches spray orifice oil beam；
Fig. 4 is flow guiding type combustion chamber described in the embodiment of the present invention and the positive view after cylinder cap, fuel injector assembly.
Description of symbols:
The combustion chamber 1-, 2- water conservancy diversion inclined-plane, 3- diversion trench, 4- cylinder cap, 5- fuel injector, the upper oil extraction beam of 51-, oil extraction beam under 52-.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of blast groove type combustion chamber suitable for straight air flue combustion system, as shown in Figures 1 to 4, including combustion chamber 1,
Water conservancy diversion inclined-plane 2, cylinder cap 4 and fuel injector 5, the shape of the combustion chamber 1 are necking shape contour structure, the aditus laryngis of the combustion chamber 1
It is equipped with the water conservancy diversion inclined-plane 2 between top surface, is equipped with fillet R at the bottom margin on the water conservancy diversion inclined-plane 2, the combustion chamber 1
The circumferentially uniformly distributed several diversion trenches 3 in top surface, the diversion trench 3 are outer thin interior deep leaf structure, in the blade of the diversion trench 3
The heart is overlapped with the center of the combustion chamber 1, and the two sided of the diversion trench 3 is equipped with a draft angle φ, is played to be oriented to air-flow and be converged
The effect of poly- (diffusion) quickening air velocity；
And the position that the diversion trench 3 intersects with the water conservancy diversion inclined-plane 2 is institute at the half position on the water conservancy diversion inclined-plane 2
The top installation cylinder cap 4 of combustion chamber 1 is stated, the intermediate of the cylinder cap 4 installs fuel injector 5, and the spray orifice of the fuel injector 5, which is arranged, to be used
Circumferentially point row is uniformly distributed for two rows, the central axis of the lower oil extraction beam 52 of the fuel injector 5 and the upper oil extraction beam of the fuel injector 5
51 central axis differ 360/n degree, and wherein n is total orifice number of fuel injector 5.
The quantity of the diversion trench 3 is equal with the quantity of upper oil extraction beam 51 of the fuel injector 5.
The value range of the draft angle φ are as follows: 10 °≤φ≤25 °.
The drop point site of the lower oil extraction beam 52 of the fuel injector 5 is the half position of 1 pit depth of combustion chamber,
The flow-guiding structure of the different conical surfaces is relied in this way, and two oil extraction beams can be sufficiently mixed with air.
The inclination angle on the water conservancy diversion inclined-plane 2 is φz, value range are as follows: 25 °≤φz≤30°。
The radius of the fillet R is more than or equal to 1mm.
The position of the position and the water conservancy diversion inclined-plane 2 of the lower oil extraction beam 52 matches.
Necking part not only can be enhanced in blast groove type combustion chamber disclosed by the invention suitable for straight air flue combustion system
Squish flow, in the case where not changing intake method, the diffusion of squish and oily beam before and after promotion top dead centre can also be to combustion gas
There are guiding convergence and diffusion, i.e., in piston stroking upward, promote the sideshake part between fogging oil beam and cylinder cap 2 and piston-top surface
Air to Combustor Flows, increase the utilization rate to air；When piston downlink, water conservancy diversion inclined-plane 2 and diversion trench 3 are to upper oil extraction beam
51 and the diffusion of lower oil extraction beam 52 also have facilitation so that combustion gas is spread to greater room, quickly mixed with air, with optimization
Combustion process.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of blast groove type combustion chamber suitable for straight air flue combustion system, it is characterised in that: including combustion chamber (1), water conservancy diversion
Inclined-plane (2), cylinder cap (4) and fuel injector (5), the shape of the combustion chamber (1) are necking shape contour structure, the combustion chamber (1)
Aditus laryngis and top surface between be equipped with the water conservancy diversion inclined-plane (2), fillet R is equipped at the top edge of the water conservancy diversion inclined-plane (2), it is described
The circumferentially uniformly distributed several diversion trenches (3) in the top surface of combustion chamber (1), the diversion trench (3) is outer thin interior deep leaf structure, described
The blade center of diversion trench (3) is overlapped with the center of the combustion chamber (1), and the two sided of the diversion trench (3) is equipped with a draft
Angle φ, and the position intersected with the water conservancy diversion inclined-plane (2) of the diversion trench (3) is at the half position of the water conservancy diversion inclined-plane (2),
The cylinder cap (4) is installed in the top of the combustion chamber (1), and the intermediate of the cylinder cap (4) installs the fuel injector (5), the spray
Circumferentially point row is uniformly distributed using two rows for the spray orifice arrangement of oily device (5), the central axis of the lower oil extraction beam (52) of the fuel injector (5)
Line differs 360/n degree with upper oil extraction beam (51) central axis of the fuel injector (5), and wherein n is total spray orifice of fuel injector (5)
Number.
2. a kind of blast groove type combustion chamber suitable for straight air flue combustion system according to claim 1, it is characterised in that:
The quantity of the diversion trench (3) is equal with the quantity of upper oil extraction beam (51) of the fuel injector (5) and circumferentially matches.
3. a kind of blast groove type combustion chamber suitable for straight air flue combustion system according to claim 1, it is characterised in that:
The value range of the draft angle φ are as follows: 10 °≤φ≤25 °.
4. a kind of blast groove type combustion chamber suitable for straight air flue combustion system according to claim 1, it is characterised in that:
The drop point site of the lower oil extraction beam (52) of the fuel injector (5) is the half position of the combustion chamber (1) pit depth.
5. a kind of blast groove type combustion chamber suitable for straight air flue combustion system according to claim 1, it is characterised in that:
The inclination angle of the water conservancy diversion inclined-plane (2) is φz, value range are as follows: 25 °≤φz≤30°。
6. a kind of blast groove type combustion chamber suitable for straight air flue combustion system according to claim 1, it is characterised in that:
The radius of the fillet R is more than or equal to 1mm.
7. a kind of blast groove type combustion chamber suitable for straight air flue combustion system according to claim 1, it is characterised in that:
The position of the lower oil extraction beam (52) and the position of the water conservancy diversion inclined-plane (2) match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279702.2A CN109339936B (en) | 2018-10-30 | 2018-10-30 | Flow guide groove type combustion chamber suitable for straight gas channel combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279702.2A CN109339936B (en) | 2018-10-30 | 2018-10-30 | Flow guide groove type combustion chamber suitable for straight gas channel combustion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109339936A true CN109339936A (en) | 2019-02-15 |
| CN109339936B CN109339936B (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811279702.2A Active CN109339936B (en) | 2018-10-30 | 2018-10-30 | Flow guide groove type combustion chamber suitable for straight gas channel combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163293A (en) * | 2022-06-30 | 2022-10-11 | 北京理工大学 | Tumble-squeeze-swirl synergistic rapid combustion optimization method for natural gas engine |
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| CN1614209A (en) * | 2004-11-30 | 2005-05-11 | 大连理工大学 | Spraying and diffusing combustion system of IC engine |
| CN104981595A (en) * | 2012-12-18 | 2015-10-14 | 沃尔沃卡车集团 | Piston for a cylinder of combustion engine |
| CN105736170A (en) * | 2016-03-28 | 2016-07-06 | 奇瑞汽车股份有限公司 | Aviation diesel engine piston combustion chamber and combustion system |
| CN106762100A (en) * | 2016-11-29 | 2017-05-31 | 奇瑞汽车股份有限公司 | A kind of aviation diesel oil machine offset piston combustion chamber and its combustion system |
| US20180023454A1 (en) * | 2016-07-25 | 2018-01-25 | Caterpillar Inc. | Piston |
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2018
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020021433A (en) * | 2000-09-15 | 2002-03-21 | 이계안 | Piston of diesel engine |
| CN1614209A (en) * | 2004-11-30 | 2005-05-11 | 大连理工大学 | Spraying and diffusing combustion system of IC engine |
| CN104981595A (en) * | 2012-12-18 | 2015-10-14 | 沃尔沃卡车集团 | Piston for a cylinder of combustion engine |
| CN105736170A (en) * | 2016-03-28 | 2016-07-06 | 奇瑞汽车股份有限公司 | Aviation diesel engine piston combustion chamber and combustion system |
| US20180023454A1 (en) * | 2016-07-25 | 2018-01-25 | Caterpillar Inc. | Piston |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163293A (en) * | 2022-06-30 | 2022-10-11 | 北京理工大学 | Tumble-squeeze-swirl synergistic rapid combustion optimization method for natural gas engine |
| CN115163293B (en) * | 2022-06-30 | 2023-08-18 | 北京理工大学 | Rolling flow-extrusion flow-rolling flow synergistic rapid combustion optimization method for natural gas engine |
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| CN109339936B (en) | 2021-03-16 |
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