CN2713148Y - Low emission diesel piston combustion chamber - Google Patents
Low emission diesel piston combustion chamber Download PDFInfo
- Publication number
- CN2713148Y CN2713148Y CN 200420062869 CN200420062869U CN2713148Y CN 2713148 Y CN2713148 Y CN 2713148Y CN 200420062869 CN200420062869 CN 200420062869 CN 200420062869 U CN200420062869 U CN 200420062869U CN 2713148 Y CN2713148 Y CN 2713148Y
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- CN
- China
- Prior art keywords
- combustion chamber
- piston
- firing chamber
- diameter
- boss
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- Expired - Lifetime
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Abstract
The utility model relates to a low emission diesel piston combustion chamber, comprising an omega-shaped combustion chamber on the top part of a piston. The diameter phi of the piston is 94-97mm; the diameteAn An of the omega-shaped combustion chamber is phi = 55-57mm. The diameter B of a throat opening is phi = 48-50mm; the depth C is 16-18mm and the arc radius D of the bottom is R=7-8mm. The diameter E of the flat surface of a boss in the middle part of the combustion chamber is phi = 9-11mm. The depth F from the flat surface of the boss to the top part of the combustion chamber is 4. 5-6. 5mm. A taper angle alpha of the slant surface of the boss is 20 degrees-23 degrees. A knuckle G of the slant face and the bottom of the boss is R= 0. 5-1. 5mm. The knuckle H of the throat opening part top surface of the of the combustion chamber is R= 0. 5-2. 5mm. The knuckle I of the throat opening part and the bottom arc surface is R=1-3mm. The utility model has reasonable design, can make full use of the air inside the combustion chamber to achieve an ideal oil-gas mixing effect, and can satisfy the requirement of high performance and low emission of a diesel engine.
Description
Technical field
The utility model relates to the diesel engine piston firing chamber of a kind of cylinder diameter at φ 94-φ 97mm, especially relates to a kind of low emissions diesel piston firing chamber.
Background technique
At present, in the little cylinder diameter direct-injection diesel engine that China produces, the ω firing chamber of piston head relatively extensively, the structure of this firing chamber, shape, size and the position of piston head to cylinder in air motion and oil gas mix bigger influence all arranged, thereby directly have influence on the combustion performance of diesel engine.The firing chamber of the existing diesel engine with direct injection directly mouthful toroidal combustion chamber that adopt more, when entering cylinder by intake duct, air produces the intake swirl that rotates around cylinder-bore axis, and compressing the not phase, the air of the annular space on piston head top is clamp-oned to produce in the firing chamber and is squeezed stream, to help fuel and Air mixing.But because the oral area of firing chamber is straight mouth structure, quench area is less, therefore can not form enough crowded stream, so air utilization ratio is on the low side, cause fuel and Air mixing effect to reduce, can't form desirable inflammable mixture, it is insufficient to burn, and causes emission performance can't reach environmental requirement.At the problems referred to above, it is closing in toroidal combustion chamber that a kind of piston combustion bowl is arranged at present, the straight mouthful toroidal combustion chamber in this firing chamber can increase the crowded stream effect of firing chamber, to improve the utilization ratio of air, but because the footpath of firing chamber is dark in less mostly, relation between balance quality and the discharging well, simultaneously the distance between boss plane, middle part and the top of combustion chamber is bigger, and the air utilization ratio in the firing chamber is on the low side.
Summary of the invention
The purpose of this utility model is to provide a kind of low emissions diesel piston firing chamber, and is not only reasonable in design, and can farthest utilize air in the firing chamber to reach desirable oil gas mixed effect, satisfies diesel engine high-performance, low emission requirement.
The technical solution of the utility model is: a kind of low emissions diesel piston firing chamber, the ω shape firing chamber that comprises piston head, described piston diameter is at φ 94-φ 97mm, ω shape firing chamber diameter A is at φ 55-φ 57mm, throat diameter B is at φ 48-φ 50mm, degree of depth C is at 16-18mm, bottom radius of arc D is at R7-8mm, middle part boss planar diameter E is at φ 9-φ 11mm, the degree of depth F of middle part boss plane separation top of combustion chamber is at 4.5-6.5mm, and boss inclined-plane cone angle is at 20 °-23 °, and inclined-plane and bottom knuckle G are at R0.5-1.5mm, aditus laryngis part and end face knuckle H be at R0.5-2.5mm, and the knuckle I of aditus laryngis part and bottom arc surface is at R1-3mm.
The utility model passes through diesel engine air inlet system, the analysis of fuel injection characteristic and cylinder head general arrangement, reasonable Arrangement piston head ω shape combustion-chamber shape and size, under the constant condition of firing chamber diameter, reduced the distance of middle part boss face to piston head, and boss inclined-plane cone angle in the middle part of increasing, simultaneously by adjusting oil sprayer in the cylinder covering position, make oil bundle and combustion-chamber shape coupling, space distribution in the firing chamber is more reasonable, it is desirable more that oil gas is mixed, simultaneously air utilization ratio is improved, thereby reaches desirable high-performance, the index of low emission.Adopt the firing chamber of the utility model structure, can make the diesel engine pollutant emission reach European I standard, can reach European II standard after installing exhaust purifier additional, fuel-economizing simultaneously has good social benefit and economic benefit.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the structural representation of the utility model ω shape firing chamber at piston head.
Fig. 2 is that cuing open of Fig. 1 shown structural representation.
Embodiment
See the low emissions diesel piston firing chamber shown in Fig. 1,2, it is the ω shape firing chamber 11 that is positioned at piston 1 top, described piston 1 diameter is at φ 94-φ 97mm, by changing the position of ω shape firing chamber 11 at piston 1 top, making 11 central positions, ω shape firing chamber is 3.5-6.5mm with respect to the fore-and-aft distance Y at piston 1 center, is 0.5-1.5mm with respect to the lateral separation X at piston 1 center.The utility model redesigns the geomery of ω shape firing chamber 11, makes ω shape firing chamber 11 can maximally utilise the air that enters piston head, makes diesel engine have best oil gas mixed effect.See as shown in Figure 2, ω shape of the present utility model firing chamber 11 diameter A are at φ 55-φ 57mm, throat diameter B is at φ 48-φ 50mm, degree of depth C is at 16-18mm, bottom radius of arc D is at R7-8mm, middle part boss planar diameter E is at φ 9-φ 11mm, the degree of depth F of middle part boss plane separation top of combustion chamber is at 4.5-6.5mm, boss inclined-plane cone angle is at 20 °-23 °, inclined-plane and bottom knuckle G are at R0.5-1.5mm, aditus laryngis part and end face knuckle H be at R0.5-2.5mm, and the knuckle I of aditus laryngis part and bottom arc surface is at R1-3mm.
Claims (2)
1, a kind of low emissions diesel piston firing chamber, the ω shape firing chamber (11) that comprises piston (1) top, it is characterized in that: described piston (1) diameter is at φ 94-φ 97mm, ω shape firing chamber (11) diameter A is at φ 55-φ 57mm, throat diameter B is at φ 48-φ 50mm, degree of depth C is at 16-18mm, bottom radius of arc D is at R7-8mm, middle part boss planar diameter E is at φ 9-φ 11mm, the degree of depth F of middle part boss plane separation top of combustion chamber is at 4.5-6.5mm, boss inclined-plane cone angle is at 20 °-23 °, inclined-plane and bottom knuckle G are at R0.5-1.5mm, aditus laryngis part and end face knuckle H be at R0.5-2.5mm, and the knuckle I of aditus laryngis part and bottom arc surface is at R1-3mm.
2, low emissions diesel piston according to claim 1 firing chamber, it is characterized in that: the fore-and-aft distance Y of the center line of described ω shape firing chamber (11) and piston (1) axis is at 3.5-6.5mm, with the lateral separation X of piston (1) center line at 0.5-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420062869 CN2713148Y (en) | 2004-07-20 | 2004-07-20 | Low emission diesel piston combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420062869 CN2713148Y (en) | 2004-07-20 | 2004-07-20 | Low emission diesel piston combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2713148Y true CN2713148Y (en) | 2005-07-27 |
Family
ID=34873241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420062869 Expired - Lifetime CN2713148Y (en) | 2004-07-20 | 2004-07-20 | Low emission diesel piston combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2713148Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397951A (en) * | 2013-08-06 | 2013-11-20 | 江苏常工动力机械有限公司 | Piston combustion chamber structure |
| CN106762099A (en) * | 2017-01-25 | 2017-05-31 | 中国第汽车股份有限公司 | A kind of burning chamber of diesel engine |
| CN108194190A (en) * | 2018-01-30 | 2018-06-22 | 清华大学 | A kind of diesel engine combustion chamber for reducing soot emissions |
-
2004
- 2004-07-20 CN CN 200420062869 patent/CN2713148Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397951A (en) * | 2013-08-06 | 2013-11-20 | 江苏常工动力机械有限公司 | Piston combustion chamber structure |
| CN106762099A (en) * | 2017-01-25 | 2017-05-31 | 中国第汽车股份有限公司 | A kind of burning chamber of diesel engine |
| CN108194190A (en) * | 2018-01-30 | 2018-06-22 | 清华大学 | A kind of diesel engine combustion chamber for reducing soot emissions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140720 Granted publication date: 20050727 |