CN207018102U - A kind of gasoline compression ignition piston combustion bowl - Google Patents
A kind of gasoline compression ignition piston combustion bowl Download PDFInfo
- Publication number
- CN207018102U CN207018102U CN201720916496.6U CN201720916496U CN207018102U CN 207018102 U CN207018102 U CN 207018102U CN 201720916496 U CN201720916496 U CN 201720916496U CN 207018102 U CN207018102 U CN 207018102U
- Authority
- CN
- China
- Prior art keywords
- piston
- pit
- top surface
- hole
- shape
- 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.)
- Active
Links
Classifications
-
- 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
Abstract
It the utility model is related to a kind of gasoline compression ignition piston combustion bowl, it is characterised in that：The top diameter D of piston is 70 90mm, piston-top surface centre bit is equipped with pit, the cross sectional shape of pit is ω shapes, there is inlet valve to avoid hole below the pit of piston-top surface, there is exhaust valve to avoid hole below the pit of piston-top surface, inlet valve avoids hole and exhaust valve avoids and cheats semicircular in shape, and piston-top surface removes pit, inlet valve avoids hole and exhaust valve avoids the piston flat-top that the part cheated is plane.It can both realize that gaseous mixture distribution met spark ignition requirement in cylinder, while compression ratio is also improved.
Description
Technical field
A kind of gasoline compression ignition piston combustion bowl is the utility model is related to, belongs to the technology neck of engine combustion chamber structure design
Domain.
Background technology
The working medium that gasoline compression-ignition mode uses is fuel and air（Or waste gas etc. is fired）Mixture, by compression make
In near top dead center involuntary ignition occurs for working medium, the advantages of it combines traditional CI patterns and SI patterns, can reach and diesel oil
The suitable thermal efficiency of machine, and NOx emission is extremely low, is almost discharged without PM, therefore gasoline compression-ignition mode obtains in recent decades
Extensive concern is arrived.But load it is too low when gaseous mixture it is very thin, can cause the job insecurity of compression-ignition mode, and
During higher load, the burning velocity of compression-ignition mode is too fast, and the rate of pressure rise is larger, and this can cause engine knock even mechanical movement part
Damage.Therefore, the working region of compression-ignition mode only accounts for 1/3 or so of spark ignition modes working region at present, can't be real
Existing full working scope compression ignition operation.
In order to play the energy-saving and emission-reduction advantage of compression-ignition mode as far as possible, a kind of new dual combustion mode is adopted extensively
With simultaneously that is, spark ignition modes and compression-ignition mode exist on a petrol engine.Spark ignition modes are also classified into average
The combustion modes such as lean-burn, layering lean-burn, the burning of theoretical mixture gas average, concentration distribution of the combustion mode to gaseous mixture in cylinder
There is higher requirement, and compression-ignition mode is not high to the conditions dictate of gaseous mixture, and the compression ratio of demand is higher.In order to take into account this
Two kinds of combustion mode demands are, it is necessary to a kind of new top land shape.
The content of the invention
The purpose of this utility model is to provide a kind of gasoline compression ignition piston combustion bowl, and it can both realize that gaseous mixture was distributed in cylinder
Meet spark ignition requirement, while compression ratio is also improved.
What the technical solution of the utility model was realized in：A kind of gasoline compression ignition piston combustion bowl, it is characterised in that：It is living
The top diameter D of plug is 70-90mm, and piston-top surface centre bit is equipped with pit, and the cross sectional shape of pit is ω shapes, piston-top surface
There is inlet valve to avoid hole below pit, there is exhaust valve to avoid hole below the pit of piston-top surface, inlet valve avoids hole and exhaust valve
Hole semicircular in shape is avoided, the part that piston-top surface removing pit, inlet valve avoidance hole and exhaust valve avoid hole is the piston of plane
Flat-top.
Diametrically D1 is 55-60mm on the lip of described pit, under diametrically D2 be 53-68mm.ω shape piston craters
Middle radius R2 scope is 3-5mm, and it is 5-7mm apart from the height H1 of piston flat-top, radius R1 model in ω shape piston craters
It is 28-30mm to enclose, and it is 0-2mm apart from the height H2 of piston flat-top.
Good effect of the present utility model is that it combines special cylinder cover structure using the utility model, it is possible to achieve gasoline engine
Spark ignition and the burning of compression ignition bimodulus, oil consumption 20% can be reduced on the basis of existing direct fuel-injection engine, maximum thermal efficiency reaches
45%。
Brief description of the drawings
Fig. 1 is the top view of the utility model piston combustion bowl.
Fig. 2 is the longitudinal section of the utility model piston combustion bowl.
1- ω shape piston craters；2- inlet valves avoid hole；3- exhaust valves avoid hole；4- piston flat-tops.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings：As shown in Figure 1, 2, a kind of gasoline compression ignition piston combustion
Room, it is characterised in that：The top diameter D of piston is 70-90mm, and piston-top surface centre bit is equipped with pit 1, the section shape of pit 1
Shape is ω shapes, and the lower section of pit 1 of piston-top surface has inlet valve to avoid hole 2, and the lower section of pit 1 of piston-top surface has exhaust valve to avoid hole
3, inlet valve avoids hole 2 and exhaust valve avoids 3 semicirculars in shape of hole, and piston-top surface removes pit 1, inlet valve avoids hole 2 and exhaust
The part that door avoids hole 3 is the piston flat-top 4 of plane.
Diametrically D1 is 55-60mm on the lip of described pit 1, under diametrically D2 be 53-68mm.ω shape piston craters
Radius R2 scope is 3-5mm in 1, and it is 5-7mm apart from the height H1 of piston flat-top 4, radius R1 in ω shapes piston crater 1
Scope is 28-30mm, and it is 0-2mm apart from the height H2 of piston flat-top 4.
In the top land that diameter D is 70-90mm, in piston centre, i.e., immediately below fuel injector, ω shape piston craters are designed
1.In order to ensure that fuel oil can spray into ω shapes piston crater 1, diametrically D1 is 55-60mm on the lip of ω shapes piston crater 1, under
Diametrically D2 is 53-68mm.Radius R2 scope is 3-5mm in ω shapes piston crater 1, its height H1 apart from piston flat-top 4
For 5-7mm, radius R1 scope is 28-30mm in ω shapes piston crater 1, and it is 0-2mm apart from the height H2 of piston flat-top 4.
Claims (2)
- A kind of 1. gasoline compression ignition piston combustion bowl, it is characterised in that：The top diameter D of piston is 70-90mm, piston-top surface center There is a pit position, and the cross sectional shape of pit is ω shapes, has inlet valve to avoid hole below the pit of piston-top surface, piston-top surface it is recessed Hole lower section has exhaust valve to avoid hole, and inlet valve avoids hole and exhaust valve avoids hole semicircular in shape, and piston-top surface removes pit, air inlet Door avoids the piston flat-top cheated with the part in exhaust valve avoidance hole is plane.
- 2. according to a kind of gasoline compression ignition piston combustion bowl described in claim 1, it is characterised in that the lip of described pit On diametrically D1 be 55-60mm, under diametrically D2 be 53-68mm；Radius R2 scope is 3-5mm in ω shape piston craters, its Height H1 apart from piston flat-top is 5-7mm, and radius R1 scope is 28-30mm in ω shape piston craters, and it puts down apart from piston The height H2 on top is 0-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916496.6U CN207018102U (en) | 2017-07-26 | 2017-07-26 | A kind of gasoline compression ignition piston combustion bowl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916496.6U CN207018102U (en) | 2017-07-26 | 2017-07-26 | A kind of gasoline compression ignition piston combustion bowl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207018102U true CN207018102U (en) | 2018-02-16 |
Family
ID=61481239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720916496.6U Active CN207018102U (en) | 2017-07-26 | 2017-07-26 | A kind of gasoline compression ignition piston combustion bowl |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207018102U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590797A (en) * | 2018-03-05 | 2018-09-28 | 中国北方发动机研究所(天津) | A kind of high-speed diesel engine combined type valve and its driving mechanism |
| CN108999717A (en) * | 2018-08-15 | 2018-12-14 | 全椒县全动机械有限公司 | A kind of diesel engine piston structure |
| CN109026426A (en) * | 2018-08-15 | 2018-12-18 | 全椒县全动机械有限公司 | A kind of internal combustion engine and its surface treatment method |
-
2017
- 2017-07-26 CN CN201720916496.6U patent/CN207018102U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590797A (en) * | 2018-03-05 | 2018-09-28 | 中国北方发动机研究所(天津) | A kind of high-speed diesel engine combined type valve and its driving mechanism |
| CN108999717A (en) * | 2018-08-15 | 2018-12-14 | 全椒县全动机械有限公司 | A kind of diesel engine piston structure |
| CN109026426A (en) * | 2018-08-15 | 2018-12-18 | 全椒县全动机械有限公司 | A kind of internal combustion engine and its surface treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6997158B1 (en) | Diesel combustion chamber | |
| CN207348958U (en) | Miller cycle engine combustion system | |
| CN207018102U (en) | A kind of gasoline compression ignition piston combustion bowl | |
| CN104500247A (en) | Combustion control method for all-condition plane of direct-injection compression-ignition engine | |
| CN105201642B (en) | Six-stroke progressively adding type burning gasoline and diesel engine | |
| CN107355297B (en) | Engine combustion chamber suitable for gasoline fuel combustion instead of diesel engine | |
| CN101413422A (en) | Direct spraying natural gas two-air valve engine underpressure layered combustion chamber structure in cylinder | |
| CN107100756A (en) | A kind of piston for directly jetting gasoline engine channel-style combustion chamber | |
| CN106762101A (en) | A kind of directly jetting gasoline engine combustion system and control method | |
| CN201306206Y (en) | Internal direct-injection natural-gas double-air-valve engine rareness layering combustion chamber structure | |
| CN201972803U (en) | Cylinder cover of motorcycle engine | |
| CN102322360B (en) | In-cylinder direction injection gasoline engine and control method thereof | |
| CN208546230U (en) | A kind of chamber structure and its connection structure of Gasoline Engines with High Compression Ratio .. | |
| CN203081564U (en) | Pressurized diesel engine piston combustion chamber | |
| CN206860304U (en) | A kind of piston for directly jetting gasoline engine channel-style combustion chamber | |
| CN208534647U (en) | A kind of low oil consumption, Low-emission gasoline machine combustion system | |
| CN106523149B (en) | A kind of opposed pistons gasoline engine dual reflux scavenging combustion system | |
| CN2906088Y (en) | Improved diesel engine 4125 cylinder cover assembly | |
| CN201554570U (en) | Direct-injection gasoline engine piston | |
| CN201610792U (en) | Air cylinder cover for internal combustion engine | |
| CN101368506A (en) | Combustion system of directly jetting diesel engine | |
| CN201003431Y (en) | Minisize vehicle sixteen valve double top cam cylinder head assembly | |
| CN207245884U (en) | A kind of gasoline lean-burn cylinder cap | |
| CN209469485U (en) | It is a kind of suitable for Miller/Atkinson cycle straight spray type engine combustion chamber | |
| CN208089408U (en) | Double-crankshaft four-stroke engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |