CN2568822Y - Low discharging diesel engine piston firing chamber - Google Patents
Low discharging diesel engine piston firing chamber Download PDFInfo
- Publication number
- CN2568822Y CN2568822Y CN 02279225 CN02279225U CN2568822Y CN 2568822 Y CN2568822 Y CN 2568822Y CN 02279225 CN02279225 CN 02279225 CN 02279225 U CN02279225 U CN 02279225U CN 2568822 Y CN2568822 Y CN 2568822Y
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- China
- Prior art keywords
- firing chamber
- diesel engine
- piston
- engine piston
- combustion
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- Expired - Fee Related
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- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model relates to a low discharging diesel engine piston firing chamber which belongs to the technical field of the combustion engine. By reasonably designing the shape and the dimension of the firing chamber positioned at the head part of a piston, the coordinate position of the firing chamber at the head part of the piston is changed, so that the best match between the coordinate position of the firing chamber and the oil injection law and the air intake swirl of an oil nozzle is achieved. Because of the utility model, the pollutant discharge value of a naturally aspirated diesel engine achieves European discharge standard I, the pollutant discharge value of a pressurizing inter-cooling diesel engine achieves European discharge standard II, and simultaneously, the diesel engine can save energy by more than 10 percent.
Description
(1) technical field:
The utility model belongs to field of internal combustion engine, relates to a kind of diesel engine piston firing chamber of low emission.
(2) background technique:
The diesel engine with direct injection piston of China's production at present is extensive use of toroidal combustion chamber.This firing chamber has the low and advantage of starting easily of specific fuel consumption from design principle, but the size and dimension at each position of toroidal combustion chamber with and all very big relevance is arranged at the particular location of piston crown with the combustion performance of direct injection combustion system.The firing chamber of the existing diesel engine with direct injection directly mouthful toroidal combustion chamber that adopt more, this firing chamber can't be given full play to the due air blast of direct injection combustion chamber and be squeezed the stream effect, reduced the mixed effect of diesel oil and inlet air eddy current, can't reach desirable air fuel ratio, its emission performance can't satisfy the national environmental protection rules of increasingly stringent.
(3) summary of the invention:
The purpose of this utility model is to provide a kind of low emissions diesel piston firing chamber of rational in infrastructure, energy saving.
The technical solution of the utility model is: by control and the fuel injection characteristic of oil nozzle and the simulation of intake swirl to the oil-fired system fuel supply rate curve, under the situation of existing piston profile size constancy of the same type, making the piston combustion bowl central position is 6.4 ± 1mm with respect to the perpendicular distance of cylinder centerline, is 1.7 ± 1mm with respect to the horizontal equivalent of cylinder centerline.Change original shape and size of piston combustion bowl simultaneously, making the firing chamber external diameter is Φ 57 ± 2mm, throat diameter is Φ 48 ± 1.5mm, and the aditus laryngis knuckle is R2 ± 1mm, and the aditus laryngis degree of depth is 5 ± 1mm, combustion-chamber depth is 24 ± 0.5mm, two the orthodrome radius surfaces in bottom are R8 ± 1mm, and the centre distance of two orthodrome radius surfaces is 1.8 ± 1mm, and middle boss height is 11 ± 1mm, middle boss inclination cone angle is 17 ° ± 3 °, and boss inclination cone angle knuckle is R2 ± 1mm.
The utility model can reach following beneficial effect: by reasonably designing the shape and size of the firing chamber that is positioned at piston head, change the coordinate position of firing chamber at piston head, strengthened the effect of the extruding swirl of firing chamber, make oil, gas rule is on request mixed and burning fully, reached and the oil nozzle fuel injection characteristic, the optimum Match of intake swirl, make the naturally aspirated Diesel value of discharging pollutants reach European I emission standard, the turbocharged and intercooled diesel engine value of discharging pollutants reaches European II emission standard, simultaneously can make diesel engine energy-conservation more than 10%, have good society and economic benefit.
(4) description of drawings: Fig. 1 is the position view of the utility model at piston head; Fig. 2 is the utility model structure cut-away view
(4) embodiment:
A kind of diesel engine piston firing chamber of low emission is positioned at the diesel engine piston top.
Under the situation of existing piston profile size constancy of the same type, change the position of piston combustion bowl center at piston head, making the piston combustion bowl center is 6.4 ± 1.5mm with respect to the perpendicular distance X of cylinder centerline, is 1.7 ± 1.5mm with respect to the horizontal equivalent Y of cylinder centerline, as shown in Figure 1; Change original shape and size of piston combustion bowl simultaneously, making the firing chamber outer diameter A is Φ 57 ± 2mm, throat diameter B is Φ 48 ± 1.5mm, aditus laryngis knuckle G is R2 ± 1mm, the aditus laryngis depth D is 5 ± 1mm, combustion-chamber depth C is 24 ± 0.5mm, two orthodrome radius surface E in bottom and F are R8 ± 1mm, and the centre distance V of two orthodrome radius surfaces is 1.8 ± 1mm, middle boss height U is 11 ± 1mm, middle boss inclination cone angle is 17 ° ± 3 °, and boss inclination cone angle knuckle H is R2 ± 1mm, as shown in Figure 2.
Claims (2)
1, a kind of diesel engine piston firing chamber of low emission, be positioned at the diesel engine piston top, it is characterized in that: the firing chamber external diameter is Φ 57 ± 2mm, throat diameter is Φ 48 ± 1.5mm, the aditus laryngis knuckle is R2 ± 1mm, the aditus laryngis degree of depth is 5 ± 1mm, combustion-chamber depth is 24 ± 0.5mm, two the orthodrome radius surfaces in bottom are R8 ± 1mm, and the centre distance of two orthodrome radius surfaces is 1.8 ± 1mm, middle boss height is 11 ± 1mm, and middle boss inclination cone angle is 17 ° ± 3 °, and boss inclination cone angle knuckle is R2 ± 1mm.
2, diesel engine piston according to claim 1 firing chamber, it is characterized in that: the piston combustion bowl central position is 6.4 ± 1.5mm with respect to the perpendicular distance of cylinder centerline, is 1.7 ± 1.5mm with respect to the horizontal equivalent of cylinder centerline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279225 CN2568822Y (en) | 2002-09-16 | 2002-09-16 | Low discharging diesel engine piston firing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279225 CN2568822Y (en) | 2002-09-16 | 2002-09-16 | Low discharging diesel engine piston firing chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2568822Y true CN2568822Y (en) | 2003-08-27 |
Family
ID=33742342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02279225 Expired - Fee Related CN2568822Y (en) | 2002-09-16 | 2002-09-16 | Low discharging diesel engine piston firing chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2568822Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312385C (en) * | 2004-04-01 | 2007-04-25 | 上海交通大学 | Non-continuous bamboo hat shaped spray burning system |
| CN101265855B (en) * | 2007-01-23 | 2010-12-15 | 通用汽车环球科技运作公司 | Low emissions diesel piston |
| CN102770633A (en) * | 2010-02-18 | 2012-11-07 | 沃尔沃技术公司 | A piston positioned for reciprocal movement in a combustion engine cylinder |
| CN101918691B (en) * | 2007-12-19 | 2013-03-06 | 雷诺股份公司 | Combustion chamber for a direct-injection supercharged combustion engine |
| CN101970828B (en) * | 2007-10-30 | 2015-05-13 | 沃尔沃拉斯特瓦格纳公司 | Device for reducing emissions in a vehicle combustion engine |
| CN104903557A (en) * | 2013-01-07 | 2015-09-09 | 丰田自动车株式会社 | Internal combustion engine |
-
2002
- 2002-09-16 CN CN 02279225 patent/CN2568822Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312385C (en) * | 2004-04-01 | 2007-04-25 | 上海交通大学 | Non-continuous bamboo hat shaped spray burning system |
| CN101265855B (en) * | 2007-01-23 | 2010-12-15 | 通用汽车环球科技运作公司 | Low emissions diesel piston |
| CN101970828B (en) * | 2007-10-30 | 2015-05-13 | 沃尔沃拉斯特瓦格纳公司 | Device for reducing emissions in a vehicle combustion engine |
| CN101918691B (en) * | 2007-12-19 | 2013-03-06 | 雷诺股份公司 | Combustion chamber for a direct-injection supercharged combustion engine |
| CN102770633A (en) * | 2010-02-18 | 2012-11-07 | 沃尔沃技术公司 | A piston positioned for reciprocal movement in a combustion engine cylinder |
| CN102770633B (en) * | 2010-02-18 | 2015-09-30 | 沃尔沃技术公司 | Be arranged to reciprocating piston in cylinder of internal-combustion engine |
| CN104903557A (en) * | 2013-01-07 | 2015-09-09 | 丰田自动车株式会社 | Internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |