CN202300690U - Improved diesel engine piston structure - Google Patents
Improved diesel engine piston structure Download PDFInfo
- Publication number
- CN202300690U CN202300690U CN2011203799361U CN201120379936U CN202300690U CN 202300690 U CN202300690 U CN 202300690U CN 2011203799361 U CN2011203799361 U CN 2011203799361U CN 201120379936 U CN201120379936 U CN 201120379936U CN 202300690 U CN202300690 U CN 202300690U
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- China
- Prior art keywords
- diesel engine
- oil
- ring
- piston
- piston structure
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- 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 - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model provides an improved diesel engine piston structure, which is capable of effectively reducing emission of oxynitride (NOx) and greatly reducing machine oil loss and comprises a piston body. A combustion chamber, an air ring and an oil ring are positioned on the piston body. The oil ring is in contact with an air cylinder sleeve through two contact rings. The improved diesel engine piston structure is characterized in that the combustion chamber is in a throat omega shape.
Description
Technical field
The utility model relates to Diesel Engine Technique Field, is specially a kind of improved diesel engine piston structure.
Background technique
Along with the increasingly stringent of Abgasgesetz, diesel engine need reach the emission limit set of national regulation, the consumption rate of not only expecting effectively to reduce the consumption rate of fuel oil but also hoping to reduce machine oil from the user perspective consideration simultaneously.Existing diesel engine piston structure is seen Fig. 1, and its firing chamber 1 is straight ω shape; Since its air directly enter to flare pit therefore when air compression burn air-flow rotate insufficient, the combustion gas mixing weak effect, after burning period is longer; The burning latter temperature is high, helps nitrogen oxide (NO
X) generation, so the NOx discharge amount is big; Simultaneously, the insufficient FT that makes of piston crown cooling is high, also causes the NOx discharge amount big; In addition, the existing piston structure, it is provided with three road compression rings 2,3,4, makes that the machine oil friction consumes greatly, specific oil consumption is big; And one oil ring 5 that existing piston structure is provided with contacts with cylinder sleeve through twice contact ring 14; Wherein single track contact ring height d is generally 0.4mm; Because the contact ring height is higher, make that itself and cylinder sleeve surface of contact pressure are less, be unfavorable for that machine oil seals; Machine oil is prone to get into firing chamber, the consumption that increases machine oil.
Summary of the invention
To the problems referred to above, the utility model provides a kind of improved diesel engine piston structure, and it can reduce nitrogen oxide (NO effectively
X) discharging, and can reduce the machine oil loss greatly.
Its technological scheme is such, and it comprises piston only, and said piston only is provided with the firing chamber, compression ring and oil ring, and said oil ring contacts with cylinder liner through the twice contact ring, and it is characterized in that: said firing chamber is a reducing ω shape.
It is further characterized in that: the reentrant diameter of said firing chamber is obtained behind the 11mm by inwardly symmetrical the contraction altogether in the maximum outside diameter both sides of the flare pit of said firing chamber; The head of said piston only is provided with inner-cooling oil recess; The piston cooling nozzle that communicates with the body main oil gallery is installed on the diesel-engine body, and said piston cooling nozzle is over against the oil inlet passage of said inner-cooling oil recess; Said compression ring is provided with twice; The height of the twice contact ring of said oil ring is 0.18mm～0.32mm.
Adopt the improved diesel engine piston structure of the utility model; Its beneficial effect is: its firing chamber is a reducing ω shape; In the firing chamber, form swirling eddy when more helping air compression, thereby obtain better combustion gas mixing effect, make that the burning in early stage is more abundant; And the burning latter temperature reduces, thereby reduces the discharging of NOx; And the inner-cooling oil recess that piston crown is provided with sprays into cooling combustion chamber in the oil pocket through piston cooling nozzle with machine oil, thereby reduces FT, further plays the effect that reduces the NOx discharging; The utility model piston structure has reduced compression ring one than existing structure, can reduce the machine oil friction and consume, thereby reduce consumption of lubricating oil; The twice contact ring height of oil ring is decreased to 0.18 mm～0.32 mm simultaneously; Because the tangential force of oil ring is constant; The reducing of contact ring height makes the surface of contact pressure of oil ring and cylinder liner increase; Thereby more help sealing machine oil, prevent that machine oil from getting into combustion chambers burn, further reduces consumption of lubricating oil.
Description of drawings
Fig. 1 is an existing diesel piston structure schematic representation;
Fig. 2 is the improved diesel engine piston structural representation of the utility model;
Fig. 3 is the relative position of piston schematic representation of piston cooling nozzle in the utility model.
Embodiment
See Fig. 2; The utility model comprises piston only 16; It is provided with firing chamber 6, compression ring and oil ring 8 on the piston only 16; Oil ring 8 contacts with cylinder liner through twice contact ring 15, and firing chamber 6 is reducing ω shape, and its reentrant diameter D is obtained behind the 11mm by inwardly symmetrical the contraction altogether in the maximum outside diameter D ' both sides in combustion chambers burn hole.Piston crown is provided with inner-cooling oil recess 9; Compression ring is provided with twice, is respectively 7,11; The height d ' of the twice contact ring 15 of oil ring 8 is 0.18 mm～0.32 mm.See Fig. 3, the piston cooling nozzle 10 that communicates with the body main oil gallery is installed on the diesel-engine body, the oil inlet passage 12 in piston cooling nozzle 10 cold chamber 9 in the piston, cold chamber in machine oil sprayed into.Among Fig. 3,13 is the drainback passage of inner-cooling oil recess 9.
Claims (6)
1. improved diesel engine piston structure, it comprises piston only, and said piston only is provided with firing chamber, compression ring and oil ring, and said oil ring contacts with cylinder liner through the twice contact ring, and it is characterized in that: said firing chamber is a reducing ω shape.
2. a kind of improved diesel engine piston structure according to claim 1 is characterized in that: the reentrant diameter of said firing chamber is obtained behind the 11mm by inwardly symmetrical the contraction altogether in the maximum outside diameter both sides of the flare pit of said firing chamber.
3. a kind of improved diesel engine piston structure according to claim 1 and 2, it is characterized in that: the head of said piston only is provided with inner-cooling oil recess.
4. a kind of improved diesel engine piston structure according to claim 3, it is characterized in that: the piston cooling nozzle that communicates with the main oil gallery of said body is installed on the diesel-engine body, and said piston cooling nozzle is over against the oil inlet passage of said inner-cooling oil recess.
5. a kind of improved diesel engine piston structure according to claim 4, it is characterized in that: said compression ring is provided with twice.
6. a kind of improved diesel engine piston structure according to claim 5, it is characterized in that: the height of the twice contact ring of said oil ring is 0.18mm～0.32mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203799361U CN202300690U (en) | 2011-10-09 | 2011-10-09 | Improved diesel engine piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203799361U CN202300690U (en) | 2011-10-09 | 2011-10-09 | Improved diesel engine piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300690U true CN202300690U (en) | 2012-07-04 |
Family
ID=46369607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203799361U Expired - Fee Related CN202300690U (en) | 2011-10-09 | 2011-10-09 | Improved diesel engine piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300690U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046172A (en) * | 2012-12-23 | 2013-04-17 | 经纬纺织机械股份有限公司 | Contact ring of drafting pressurizing cylinder of combing machine |
| CN107989712A (en) * | 2017-12-27 | 2018-05-04 | 广西玉柴机器股份有限公司 | Diesel engine piston structure |
-
2011
- 2011-10-09 CN CN2011203799361U patent/CN202300690U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046172A (en) * | 2012-12-23 | 2013-04-17 | 经纬纺织机械股份有限公司 | Contact ring of drafting pressurizing cylinder of combing machine |
| CN107989712A (en) * | 2017-12-27 | 2018-05-04 | 广西玉柴机器股份有限公司 | Diesel engine piston structure |
| CN107989712B (en) * | 2017-12-27 | 2019-12-06 | 广西玉柴机器股份有限公司 | Piston structure of diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20171009 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |