CN201148904Y - Low discharge diesel combustion chamber - Google Patents
Low discharge diesel combustion chamber Download PDFInfo
- Publication number
- CN201148904Y CN201148904Y CNU2007201314482U CN200720131448U CN201148904Y CN 201148904 Y CN201148904 Y CN 201148904Y CN U2007201314482 U CNU2007201314482 U CN U2007201314482U CN 200720131448 U CN200720131448 U CN 200720131448U CN 201148904 Y CN201148904 Y CN 201148904Y
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- CN
- China
- Prior art keywords
- combustion chamber
- firing chamber
- emission
- combustion
- radius
- 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.)
- Expired - Lifetime
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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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- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model relates to a combustion chamber of a low emission diesel engine, in particular to a low emission combustion chamber with limited 102 mm air cylinder bore and 118 mm piston stroke, which is used for the low emission direct-injection diesel engine, and belongs to the technology field of the combustion device. The low emission combustion chamber is characterized in that the bottom part of the combustion chamber is in a circular concave pit shape, the circular arc radius is 6 to 7 mm, the distance between the lower point of the bottom part of the combustion chamber and the top surface of the combustion chamber is 18 to 18.5 mm, and the diameter of the cross section of the combustion chamber is 60 to 65 mm; the center of the combustion chamber is a circular conical surface with the angle of 139 to 141 DEG and the radius of 9 to 11 mm, and the distance between the top end of the circular conical surface and the top surface of the combustion chamber is 5.5 to 6 mm. The combustion chamber has the advantages that fuel oil can be fully led into the combustion chamber, so as to ensure that the fuel oil is fully mixed with air, and high-quality gas-oil mixture can be formed; through improving the combustion process of the diesel engine, the specific fuel oil consumption and the emission pollutant of the engine can be reduced; after the combustion chamber is reasonably matched with the engine, the emission level can reach the national discharge standard III.
Description
Technical field
The utility model relates to a kind of A31 type low-emission diesel firing chamber, specifically limits the low emission combustor of cylinder bore 102mm and piston stroke 118mm, is used for the direct injection diesel engine of low emission, belongs to the firing unit technical field.
Background technique
In prior art, on light duty diesel engine, country is not very tight to the requirement of discharging, but perfect day by day along with national Abgasgesetz, and to the increasingly stringent of NOx and particulate emission, the light duty diesel engine of exploitation low emission has been imperative.On the small-power high-speed diesel engine, the time compole of mixed gas formation and burning is short, and every fuel delivery per cycle is very little again, depending merely on atomizing and mixing, and then injection diameter must be done very for a short time, and injection pressure is very high, makes oil-fired system manufacturing difficulty.Because the rotating speed height, in order to obtain the preferable performance index, just requiring has combustion process preferably when little excess air coefficient, the dell shape firing chamber of eddy current so just occurred having.Such firing chamber is divided into two spaces, and surplus on combustion chamber volume in the piston and the piston head is volume.Dell shape firing chamber requires to reduce to oil-fired system, forms owing to utilize intake swirl to strengthen mixed gas, air utilization ratio is improved greatly, and fuel consumption rate is low, and starting easily.The surface of dell shape firing chamber does not directly contact with cooling water, can reduce radiation loss.For two air valve engines, owing to will strengthen inlet and outlet door size as much as possible, firing chamber, oil sprayer and cylinder three's center line is staggered mutually.Experience shows, if the side-play amount of firing chamber and oil sprayer is little, can not have a significant impact engine performance.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, thereby provide a kind of low-emission diesel firing chamber, fuel oil can be introduced the firing chamber fully, make the abundant and air mixing of fuel oil energy, form the oil of high quality gas mixture, improve the combustion process of diesel engine, thereby reduce the engine fuel consumption rate and discharge pollutants.
Main solution of the present utility model is achieved in that
The utility model comprises toroidal combustion chamber, and the bottom, firing chamber is made as the circular pit shape, and radius of arc is: 6～7mm, and the distance from bottom, firing chamber lower to the firing chamber end face is: 18～18.5mm, the diameter of section of combustion chamber is: 60～65mm; Heart shape is that an angle is in the firing chamber: 139～141 °, radius is: the arc surface of 9～11mm, the top of arc surface to the distance of firing chamber end face is: 5.5～6mm.
Bottom, described firing chamber with the center, firing chamber by radius is: the arc transition of 4～6mm; Described firing chamber end face diameter is: 60～61mm;
Described firing chamber end face and bottom by radius are: the arc transition of 4～6mm; Described firing chamber end face and end face by radius are: the arc transition of 1～3mm.
The eccentric distance at center, described firing chamber and piston center is: 0.75～3.5mm.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Guarantee when can make diesel engine improve injection pressure and retarded injection advance angle to improve engine fuel economy by sufficient combustion, reduce NOx and particulate emission; Because piston combustion bowl adopts special eccentric position, shape, physical dimension can influence the drop point site of oil bundle, thereby influences combustion process; Fuel oil can be introduced the firing chamber fully, make fuel oil impact wall, and can rebound out, cause the distribution again of fuel oil, make the abundant and air mixing of fuel oil energy, form the oil of high quality gas mixture, improve the combustion process of diesel engine, thereby reduce the engine fuel consumption rate and discharge pollutants; Can effectively prevent fuel oil, guarantee the proper lubrication between piston and the cylinder sleeve, thereby the fuel oil that makes the later stage spray can burn equally effectively oil dilution.Low emission has really been realized in a kind of firing chamber like this; After the motor rational Match, emission level can reach national III level discharging.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model firing chamber is a toroidal combustion chamber, and bottom, firing chamber 4 is the circular pit shape, and radius of arc is: 7mm, the distance from bottom, firing chamber 4 lowest parts to firing chamber end face 1 is: 18.2mm, the diameter of maximum cross-section, firing chamber is: 64.8mm.Center, firing chamber 3 shapes are that an angle is: 140 °, radius is: the arc surface of 10mm, the top of arc surface to the distance of firing chamber end face 1 is: 5.8mm, bottom 4, firing chamber with center, firing chamber 3 by radius is: the arc transition of 5mm.End face 2 diameters in firing chamber are: 60.8mm, end face and bottom by radius are: the arc transition of 5mm, end face and end face by radius are: the arc transition of 2mm.
Eccentric structure is adopted in the utility model firing chamber, and promptly the center of firing chamber is different with the center of piston.The eccentric distance at center, firing chamber and piston center is: 0.75mm and 3.5mm.
Claims (2)
1, a kind of low-emission diesel firing chamber, comprise toroidal combustion chamber, it is characterized in that bottom, firing chamber (4) is made as the circular pit shape, radius of arc is: 6～7mm, bottom, firing chamber (4) lower to the distance of firing chamber end face (1) is: 18～18.5mm, and the diameter of section of combustion chamber is: 60～65mm; Center, firing chamber (3) angle is: 139～141 °, radius is: the arc surface of 9～11mm, the top of arc surface to the distance of firing chamber end face (1) is: 5.5～6mm, center, firing chamber (3) with the eccentric distance at piston center are: 0.75～3.5mm.
2, low-emission diesel according to claim 1 firing chamber is characterized in that described bottom, firing chamber (4) and center, firing chamber (3) by radius are: the arc transition of 4～6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201314482U CN201148904Y (en) | 2007-12-14 | 2007-12-14 | Low discharge diesel combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201314482U CN201148904Y (en) | 2007-12-14 | 2007-12-14 | Low discharge diesel combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201148904Y true CN201148904Y (en) | 2008-11-12 |
Family
ID=40116671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201314482U Expired - Lifetime CN201148904Y (en) | 2007-12-14 | 2007-12-14 | Low discharge diesel combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201148904Y (en) |
-
2007
- 2007-12-14 CN CNU2007201314482U patent/CN201148904Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINESE AUTO GROUP CO NO.1 Free format text: FORMER OWNER: WUXI DIESEL ENGINE PLANT, CHINA NO.1 AUTOMOBILES GROUP CORP. Effective date: 20101116 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 214026 NO.9, BRANCH ROAD 1, TANGNAN ROAD, NANCHANG DISTRICT, WUXI CITY, JIANGSU PROVINCE TO: 130011 NO.2259, DONGFENG AVENUE, CHANGCHUN CITY, JILIN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101116 Address after: 130011 Dongfeng Street, Jilin, Changchun, No. 2259 Patentee after: China FAW Group Corporation Address before: 214026, No. 9, South Branch Road, South District, Jiangsu, Wuxi Patentee before: China First Automobile Works Group Corporation Wuxi Diesel Engine Works |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081112 |