CN202108579U - Combustion system of vortex type diesel engine - Google Patents
Combustion system of vortex type diesel engine Download PDFInfo
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- CN202108579U CN202108579U CN2011202154449U CN201120215444U CN202108579U CN 202108579 U CN202108579 U CN 202108579U CN 2011202154449 U CN2011202154449 U CN 2011202154449U CN 201120215444 U CN201120215444 U CN 201120215444U CN 202108579 U CN202108579 U CN 202108579U
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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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Abstract
The utility model discloses a combustion system of a vortex type diesel engine, comprising a main combustion chamber and a vortex chamber, wherein the main combustion chamber is arranged between a cylinder cover and the top surface of a piston; an insert of the vortex chamber is provided with a vortex channel for communicating the vortex chamber with the main combustion chamber; the section vertical to the circulation direction of gas of the vortex channel is a straight line at one side near to the center of the vortex chamber, and is an arc at one side near to the wall of the vortex chamber; the straight line side and the arc side are transited smoothly by an outward-arched ach line; and the area of the section of the vortex channel in the gas circulation direction is unchangeable, and the length-width ratio D/C of the section is equal to 2.75-2.85. By adopting the structural form of the vortex chamber of the combustion system, the vortex intensity in the whole vortex chamber is more uniform, and oil injected by an oil injector has sufficient time to be mixed with vortex gas, thereby obtaining more uniform mixed gas, enhancing combustion efficiency, improving economy, reducing emission, reducing starting pressure, and improving the reliability of the oil injector.
Description
Technical field
The utility model belongs to parts and components of diesel engine and manufactures and designs the field, particularly a kind of combustion system of vortex diesel engine.
Background technique
Swirl chamber diesel, with respect to straight spray facility have that work is soft, advantage such as low noise and low emission.But Economy and cold-start performance are not as diesel engine with direct injection, and vortex chamber's volume of conventional turbine accounts for more than 60% of total combustion chamber volume, and heat diffusion area is bigger like this; Heat loss is bigger, and in order to obtain than maelstrom, the swirl channel sectional area is all less with the ratio of cylinder body sectional area; Be about 0.7%～0.8%, narrow swirl channel has caused very big flow losses, and present small-bore diesel engine receives vortex chamber's spatial limitation; Less use glow plug, cold starting is undesirable.
For addressing the above problem, Chinese patent CN 201083150Y discloses a kind of diesel engine with low emission performance turbulence chamber.Its cavity with the swirl-chamber insert inwall is designed with flat inverted cone; And the distance of connecting passage between the rotational axis of the geometrical center on the outer wall of inserting and the cavity of inserting of vortex chamber and main combustion chamber be decided to be H=4-6mm, the shaft core line of connecting passage intersects angle 40 with the rotational axis of the cavity of inserting
0-50
0Solve existing diesel because the strength of vortex in the vortex chamber is strong, the oil gas mixing is inhomogeneous, spray into the unfavorable problem of power character, Economy and emission performance that the fuel of vortex chamber can not the diesel engine that perfect combustion caused.But the channel cross-section of this vortex chamber is shaped as waist shape, and it is a symmetric shape; Just make near the zone 1 of eddy current locular wall and equal basically, so just cause the eddy velocity in zone 1 slow, and regional 2 eddy velocity is fast near the gas flow in the zone 2 at center, vortex chamber; And the cracking pressure of conventional axial needle type injector is 13-15MPa, and the oil bundle that gushes out at a high speed is in that to pass through regional 1 o'clock compole short, and the oil mass that causes zone 1 seldom; The effect of most of oil the last 2 eddy current in the zone down and regional 2 li air mixing; So the zone has become the thin oil district for 1 li, and the zone has become the rich oil district for 2 li, and oil gas mixes inhomogeneous; Can not burn cmpletely, the Economy of diesel engine and emission performance descend.
For solving the problems of the technologies described above, Chinese patent CN8645755 A discloses a kind of Swirl Chamber Diesel Engine and inserts, and has been characterized in improving the structural type of the original connecting passage of turbulence chamber.Connecting passage is made length direction flaring from top to bottom, and the cross section camber makes the air-flow that gets into the vortex chamber almost arrive the wall of vortex chamber simultaneously; In parallel plane, produce organized main eddy current, combustion gas is along the connecting passage ejection of flaring, to main combustion chamber in the inflation process; Basically flow along the pit cylinder; Thereby improved air utilization ratio, reduced the fuel oil loss, improved the main combustion chamber combustion position.But there are two shortcomings in the connecting passage of this sectional shape: though 1. it has improved the strength of vortex near the eddy current locular wall, make center, vortex chamber strength of vortex weaken, it is best that fuel oil and gas mixed effect can not reach; 2.,, when crossing passage, air communication just strengthened loss in compression stroke though the flaring shape has reduced the flow losses of expansion stroke.
The model utility content
For this reason, the utility model technical problem to be solved is to provide a kind of combustion system of vortex diesel engine of low emission performance.
For solving the problems of the technologies described above, the combustion system of the vortex diesel engine of the utility model, it comprises main combustion chamber and vortex chamber; Said vortex chamber is arranged on the cylinder head; The lower chamber of said vortex chamber is provided with one and inserts, and said inserting is provided with groove, and said groove forms holistic eddy chamber with the upper chamber of said vortex chamber; Said lower end surface of inserting is concordant with the lower end surface of cylinder head, and said eddy chamber is connected with nozzle opening; Said main combustion chamber is arranged between piston and the cylinder head; Said inserting is provided with the swirl channel that is communicated with said eddy chamber and main combustion chamber; Said swirl channel perpendicular to the sectional shape on the gas communication direction is being: the side near center, said vortex chamber is a straight line; Side near said eddy current locular wall is a camber line; Said straight sides and said camber line side seamlessly transit through the circular arc line of outer arch, and the section area of said swirl channel on the gas communication direction is constant, and the Elongation D/C in said cross section is 2.75-2.85.
The ratio of the long-pending sectional area with piston of the overflow section of said swirl channel is 1%-1.5%, and said swirl channel is 35 °-45 ° with the formed angle γ in the lower end surface of cylinder head.
The volume of said eddy chamber accounts for the 53-58% of main combustion chamber and eddy chamber total measurement (volume).
The upper chamber of said vortex chamber is a hemisphere.
The said groove of inserting is reverse frustoconic, and its cone angle beta is 30 °-40 °.
The end face of said piston is provided with the piston guiding gutter; The width P of said piston guiding gutter is identical with swirl channel length D; Depth dimensions h is 1.8-2.2mm, and water conservancy diversion radius of arc R is 20-25mm, and the center line of said piston guiding gutter and the formed angle theta of the axis of piston are 20 °-25 °.
The center line of said nozzle opening and the formed angle of the axis of said eddy chamber are 23 °-27 °.
The upper chamber of said vortex chamber also is communicated with glow plug, and the axis of said glow plug is 10-12mm apart from the said axial line distance B of vortex chamber.
The technique scheme of the utility model is compared existing technology and is had the following advantages:
(1) the utility model swirl channel perpendicular to the sectional shape on the gas communication direction be: the side near said vortex chamber center is a straight line; Side near said eddy current locular wall is a camber line; Said straight sides and said camber line side seamlessly transit through the circular arc line of outer arch, and the Elongation D/C in said cross section is 2.75-2.85.The section area of said swirl channel on the gas communication direction is constant.The swirl channel of this structure makes near the air quantity in the zone of eddy current locular wall suitably greater than the air near the zone at center, vortex chamber, like this can be so that the strength of vortex in the whole vortex chamber is more even, and the oil bundle of oil sprayer ejection has adequate time to follow swirl gas to mix; Obtain mixed gas more uniformly; Improve combustion efficiency, improve Economy, reduce discharging; Reduce cracking pressure, also improved the reliability of oil sprayer.
(2) the utility model suitably reduces vortex chamber's volume; Make it account for total firing chamber ratio and reduce to 53%-58%, reduced radiation loss like this, the swirl channel sectional area rises to 1%-1.5% with the ratio of cylinder body sectional area by 0.7%～0.8% of routine; In piston head guiding gutter is set; Make gas flow more smooth-going, reduced flow losses greatly, also improved starting performance; The raising of swirl channel sectional area; Make eddy velocity reduce,, make that strength of vortex strengthens in the vortex chamber through strengthening swirl channel cross section length and width ratio; Place, dead angle, vortex chamber air-flow utilization ratio improves, thereby offsets because of strengthening the negative effect that channel cross-sectional area brings.
Description of drawings
For the content that makes the utility model is more clearly understood,, the utility model is done further detailed explanation, wherein below according to the specific embodiment of the utility model and combine accompanying drawing
Fig. 1 is the combustion system of the vortex diesel engine of the utility model;
Fig. 2 is the structural representation of vortex chamber;
Fig. 3 is the insert structure schematic representation;
Fig. 4 is that the A of Fig. 3 is to view;
Fig. 5 is the structural representation of piston guiding gutter
Fig. 6 is that the E-E of Fig. 5 is to view;
Fig. 7 is that the C-C of Fig. 5 is to view.
Reference character is expressed as among the figure:
The 1-cylinder head 2-upper chamber 3-swirl channel 4-5-Starting Hole 6-piston 7-nozzle opening 8-oil sprayer 9-conductive plate 10-glow plug 61-piston guiding gutter of inserting.
Embodiment
Shown in Figure 1 is a kind of combustion system of vortex diesel engine, and it comprises main combustion chamber and vortex chamber:
Said vortex chamber is as shown in Figure 2, inserts and 4 surround in upper chamber 2 that it is formed by cylinder head 1 inwall and the bottom with a groove, and the said upper chamber 2 of present embodiment is a hemisphere.Said upper chamber 2 communicates with nozzle opening 7, is connected with axle type single hole oil sprayer 8 in the said nozzle opening, and said nozzle opening 7 is 23 °-27 ° with the angle of the axis of said vortex chamber.Top, said vortex chamber also is communicated with glow plug 10, and multi-cylinder glow plug 10 links together through conductive plate 9.Said glow plug 10 axis are 10-12mm apart from the said axial line distance B of vortex chamber.Said 4 inwalls of inserting are reverse frustoconic, and its cone angle beta is 30 °-40 °, and is as shown in Figure 3.Said 4 the lower end surface of inserting is concordant with the lower end surface of cylinder head 1.Install glow plug 10 in the vortex chamber additional, when starting, give charge heating, can obviously improve cold-start performance.
Said main combustion chamber is between said main combustion chamber is arranged between piston 6 and the cylinder head 1; Said inserting 4 is provided with swirl channel 3 and the Starting Hole 5 that is communicated with said vortex chamber and said main combustion chamber; Said swirl channel 3 is straight line perpendicular to the cross section on the gas communication direction in the side near center, said vortex chamber; Side near said eddy current locular wall is a camber line, and said straight sides and said camber line side seamlessly transit through the circular arc line of outer arch, and be as shown in Figure 4.Said swirl channel 3 sectional areas are 1%-1.5% with the long-pending ratio of piston cross-section, and cross section Elongation D/C is 2.75-2.85.Said swirl channel is 35 °-45 ° with the formed angle γ in the lower end surface of cylinder head 1.The raising of swirl channel sectional area makes eddy velocity reduce; Through strengthening swirl channel cross section length and width ratio; Make that strength of vortex strengthens in the vortex chamber, place, dead angle, vortex chamber air-flow utilization ratio improves, thereby offsets because of strengthening the negative effect that channel cross-sectional area brings.We are through being reduced to 10-11MPa with injection pressure of injector, and the shape of swirl channel 3 changes into arc, the bent body direction towards the eddy current locular wall away from the center, vortex chamber; The Elongation D/C in said cross section is 2.75-2.85, makes near air quantity in the zone of eddy current locular wall suitably greater than near the air in the zone at center, vortex chamber, like this can be so that the strength of vortex in the whole vortex chamber is more even; The oil bundle of oil sprayer ejection has adequate time to follow swirl gas to mix, and obtains mixed gas more uniformly, improves combustion efficiency; Improve Economy; Reduce discharging, reduce cracking pressure, also improved the reliability of oil sprayer.
The section area of said swirl channel on the gas communication direction is constant.Make this combustion system air communication in expansion stroke and compression stroke cross the amount of flow basically identical of passage, the gas flow loss is little.
The volume of said vortex chamber accounts for the 53-58% of main combustion chamber and vortex chamber's total measurement (volume), its existing relatively most of combustion system of diesel engine, and the ratio of vortex chamber reduces, and has promptly reduced radiation loss.
Said piston 6 end faces are provided with piston guiding gutter 61, and are as shown in Figure 5.The width P of said piston guiding gutter 61 is identical, as shown in Figure 6 with swirl channel 3 length D.Depth dimensions h is 1.8-2.2mm, and water conservancy diversion radius of arc R is 20-25mm.As shown in Figure 7.Said piston guiding gutter center and centre angle theta are 20 °-25 °, and guiding gutter 61 makes gas flow more smooth-going, has reduced flow losses greatly, has also improved starting performance.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to mode of execution.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (8)
1. the combustion system of a vortex diesel engine; It comprises main combustion chamber and vortex chamber, and said vortex chamber is arranged on the cylinder head (1), and the lower chamber of said vortex chamber is provided with one insert (4); Said inserting (4) is provided with groove; Said groove forms holistic eddy chamber with the upper chamber (2) of said vortex chamber, and the lower end surface of the same cylinder head in lower end surface (1) of said inserting (4) is concordant, and the same nozzle opening of said eddy chamber (7) is connected; Said main combustion chamber is arranged between piston (6) and the cylinder head (1), and said inserting (4) is provided with the swirl channel (3) that is communicated with said eddy chamber and main combustion chamber, it is characterized in that:
Said swirl channel (3) is being straight line perpendicular to the cross section on the gas communication direction in the side near center, said vortex chamber; Side near said eddy current locular wall is a camber line; Said straight sides and said camber line side seamlessly transit through the circular arc line of outer arch; The section area of said swirl channel (3) on the gas communication direction is constant, and the Elongation in said cross section (D/C) is 2.75-2.85.
2. the combustion system of vortex diesel engine according to claim 1 is characterized in that:
The ratio of the long-pending sectional area with piston of the overflow section of said swirl channel (3) is 1%-1.5%, and said swirl channel (3) is 35 °-45 ° with the lower end surface of cylinder head formed angle (γ).
3. the combustion system of vortex diesel engine according to claim 1 and 2 is characterized in that:
The volume of said eddy chamber accounts for the 53-58% of main combustion chamber and eddy chamber total measurement (volume).
4. the combustion system of vortex diesel engine according to claim 3 is characterized in that:
The upper chamber of said vortex chamber (2) is a hemisphere.
5. the combustion system of vortex diesel engine according to claim 3 is characterized in that:
Said inserting (4) groove is reverse frustoconic, and its cone angle (β) is 30 °-40 °.
6. the combustion system of vortex diesel engine according to claim 1 is characterized in that:
The end face of said piston (6) is provided with piston guiding gutter (61); The width (P) of said piston guiding gutter (61) is identical with swirl channel (3) length (D); Depth dimensions (h) is 1.8-2.2mm; Water conservancy diversion radius of arc (R) is 20-25mm, and the center line of said piston guiding gutter and the formed angle theta of the axis of piston are 20 °-25 °.
7. the combustion system of vortex diesel engine according to claim 5 is characterized in that:
The formed angle of axis (α) of the center line of said nozzle opening (7) and said eddy chamber is 23 °-27 °.
8. the combustion system of vortex diesel engine according to claim 5 is characterized in that:
The upper chamber of said vortex chamber also is communicated with glow plug (6), and the axis of said glow plug (6) is 10-12mm apart from said vortex chamber axial line distance (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202154449U CN202108579U (en) | 2011-06-23 | 2011-06-23 | Combustion system of vortex type diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202154449U CN202108579U (en) | 2011-06-23 | 2011-06-23 | Combustion system of vortex type diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN202108579U true CN202108579U (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202154449U Expired - Lifetime CN202108579U (en) | 2011-06-23 | 2011-06-23 | Combustion system of vortex type diesel engine |
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| Country | Link |
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| CN (1) | CN202108579U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251845A (en) * | 2011-06-23 | 2011-11-23 | 常州常发动力机械有限公司 | Combustion system of vortex-type diesel engine |
| CN102691564A (en) * | 2012-06-01 | 2012-09-26 | 慈溪三环柴油机有限公司 | Novel swirl chamber for internal combustion engine |
| CN109854360A (en) * | 2019-02-01 | 2019-06-07 | 华峰 | Combusting room device, cylinder, engine and gasoline engine |
| CN112647205A (en) * | 2020-12-04 | 2021-04-13 | 韩雷雷 | Flat sewing machine for sewing cloth |
-
2011
- 2011-06-23 CN CN2011202154449U patent/CN202108579U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251845A (en) * | 2011-06-23 | 2011-11-23 | 常州常发动力机械有限公司 | Combustion system of vortex-type diesel engine |
| CN102691564A (en) * | 2012-06-01 | 2012-09-26 | 慈溪三环柴油机有限公司 | Novel swirl chamber for internal combustion engine |
| CN109854360A (en) * | 2019-02-01 | 2019-06-07 | 华峰 | Combusting room device, cylinder, engine and gasoline engine |
| CN109854360B (en) * | 2019-02-01 | 2023-06-30 | 华峰 | Combustion chamber device, cylinder, engine and gasoline engine |
| CN112647205A (en) * | 2020-12-04 | 2021-04-13 | 韩雷雷 | Flat sewing machine for sewing cloth |
| CN112647205B (en) * | 2020-12-04 | 2022-07-05 | 滨州市沾化区如霞纺织品有限公司 | Flat sewing machine for sewing cloth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |