CN106677916A - Low-emission non-road single-cylinder diesel engine piston structure - Google Patents
Low-emission non-road single-cylinder diesel engine piston structure Download PDFInfo
- Publication number
- CN106677916A CN106677916A CN201710084007.XA CN201710084007A CN106677916A CN 106677916 A CN106677916 A CN 106677916A CN 201710084007 A CN201710084007 A CN 201710084007A CN 106677916 A CN106677916 A CN 106677916A
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- China
- Prior art keywords
- ring
- ring groove
- piston
- gas
- groove
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/26—Pistons having combustion chamber in piston head
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention relates to a diesel engine piston structure, in particular to a low-emission non-road single-cylinder diesel engine piston structure, and belongs to the technical field of diesel engine power. The structure comprises a piston body, a center boss is arranged on the center of the bottom of a combustion chamber, annular convex ribs are arranged on the side wall of the combustion chamber, and a sharp corner thick lip is formed in the throat of the combustion chamber; a first gas ring groove, a second gas ring groove and an oil ring groove are sequentially formed in the piston ring shore area of the outer side wall of the piston body from top to bottom, a pressure reduction ring groove is formed in the ring shore between the first gas ring groove and the second gas ring groove, and an upper pressure reduction ring belt and a lower pressure reduction ring belt are arranged on the upper ring shore and the lower ring shore of the oil ring groove correspondingly. Due to the upper pressure reduction ring belt and the lower pressure reduction ring belt, the pressure difference of the upper ring shore and the lower ring shore of the second gas ring groove and the upper ring shore and the lower ring shore of the oil ring groove can be increased, the vertical moving speed of the piston ring is promoted to be increased, and in cooperation with improvement of the surface honing quality of an optimized flexible piston ring and an optimized air cylinder sleeve, the engine oil consumption rate of the diesel engine can be obviously reduced.
Description
Technical field
The present invention relates to a kind of diesel engine piston structure, specifically a kind of low emission non-rice habitats single cylinder diesel piston
Structure, belongs to diesel powered technical field.
Background technology
The piston structure of original non-rice habitats single cylinder diesel is more outmoded, and combustor mostly has little wedge angle boss using centre
ω circular configurations, match than gas handling system with low-pressure injection system and high-eddy, the indoor air-fuel mixture effect of burning compared with
Difference；Its piston land is relatively simple for structure, and between compression ring and oil ring, top-down pressure reduction is less, and specific oil consumption is higher, it is impossible to
Meet the requirement of non-rice habitats technologies for low emissions of diesel engines standard.
After non-rice habitats diesel engine China phase III discharge standard is promulgated, the single cylinder supporting for agricultural machinery is mainly used in
For diesel engine, it is considered to cost factor, in industry, most of producer adopts mechanical pump internal purification technology route mostly, by suitable
When increase injection pressure, optimization spraying system and gas handling system, coordinate fuel oil and air amount, when, sky（Quantity, time, sky
Between）Triadic relation, makes burning interior air-fuel mixture more uniform, and shortens burning time as much as possible, to obtain CO, HC, NOX
Discharge and the optimum efficiency of smoke intensity index.As the PM discharges of diesel engine are determined by smoke intensity and engine oil consumption, and the 30 of PM discharges~
60% is caused by engine oil consumption, therefore reduces engine oil consumption, it is necessary to study structure and their motions of piston-cylinder ring-cylinder sleeve component
Rule, improve piston land structure, by with adopt optimization flexible plunger ring and reduce cylinder liner deformation, improve sleeve port
The measures such as honing quality are matched, and can further reduce consumption of lubricating oil.Therefore, for low discharge single cylinder diesel engine, using machinery
During pump emission controls by improving combustion measure, piston combustion bowl and ring bank structure must Optimal improvements in addition, so as to mutual with other technologies measure
Adapt to and match.
The content of the invention
It is an object of the invention to overcome above-mentioned weak point, live so as to provide a kind of low emission non-rice habitats single cylinder diesel
Plug structure, is capable of the gas exhausting property of Optimization of Diesel Engine, meets three discharge standard of state of non-rice habitats diesel engine.
According to the technical scheme that the present invention is provided, low emission non-rice habitats single cylinder diesel piston structure includes piston body, living
Combustor is provided with the top of cock body, be it is characterized in that：Bottom of combustion chamber center is provided with central boss, and the side wall of combustor is provided with annular
Convex tendon, is provided with wedge angle thickness lip at the aditus laryngis of combustor；The piston land region of the lateral wall of piston body is set from top to bottom successively
There are first gas ring groove, second gas ring groove and oil ring groove, the ring between first gas ring groove and second gas ring groove is provided with pressure-reducing ring on the bank
Groove, the ring up and down of oil ring groove are respectively equipped with pressure-reducing ring band and lower pressure-reducing ring band on the bank.
Further, the annular groove that reduces pressure is circular arc.
Compared with the prior art the present invention has advantages below：
Present configuration is simple, compact, reasonable, and it is indoor in burning that the structure of new combustion chamber increased the fuel oil sprayed from oil nozzle
Extruding, shunting and disturb, fuel oil and air can be effectively improved in the indoor mixing uniformity of burning, shorten burning time, energy
Significantly reduce diesel engine gas（CO、HC、NOX）And granule（PM）Discharge；Upper pressure-reducing ring band and lower pressure-reducing ring band can increase
The pressure reduction of second gas ring groove and the upper and lower ring bank of oil ring groove, promotes the speed of the upper and lower play of piston ring to accelerate, and coordinates the flexibility of optimization
The lifting of piston ring and cylinder-barrel surface honing quality, can obviously reduce the specific oil consumption of diesel engine；The pressure-reducing ring of circular arc
Groove increases the pressure reduction of the upper and lower ring bank of top compression ring, improves the downstream rate of top compression ring, increases sealing, reduces compression ring
Alter on oil gas in groove and enter cylinder.
Description of the drawings
Fig. 1 is front view of the present invention.
Fig. 2 is enlarged drawing at A in Fig. 1.
Description of reference numerals：1- piston bodies, 2- combustor, 3- first gas ring grooves, 4- second gas ring grooves, 5- oil ring grooves, 6-
Pressure-reducing ring band, 9- central boss, 10- annular convex ribs, 11- wedge angles thickness lip under decompression annular groove, the upper pressure-reducing ring bands of 7-, 8-.
Specific embodiment
The embodiment combined in accompanying drawing is further described by the present invention below：
As shown in Figure 1 and 2, the invention mainly comprises piston body 1, is provided with combustor 2 at the top of piston body 1.3 bottom centre of combustor
Central boss 9 is provided with, the side wall of combustor 2 is provided with the annular convex rib 10 for promoting Oil-gas Separation mixing, at the aditus laryngis of combustor 2
It is provided with wedge angle thickness lip 11.The structure of combustor 2 increased the fuel oil that sprays from oil nozzle in the indoor extruding of burning, shunt and disturb
It is dynamic, fuel oil and air can be effectively improved in the indoor mixing uniformity of burning, shortened burning time, diesel engine gas can be significantly reduced
Body（CO、HC、NOX）And granule（PM）Discharge.
The piston land region of the lateral wall of piston body 1 is sequentially provided with first gas ring groove 3, second gas ring groove 4 from top to bottom
With oil ring groove 5, the ring between first gas ring groove 3 and second gas ring groove 4 is provided with the decompression annular groove 6 of circular arc on the bank, circular arc
Decompression annular groove 6 increases the pressure reduction of the upper and lower ring bank of top compression ring, improves the downstream rate of top compression ring, increases sealing,
Reduce to alter on the oil gas in compression and enter cylinder.
The ring up and down of oil ring groove 5 is respectively equipped with pressure-reducing ring band 7 and lower pressure-reducing ring band 8 on the bank, and upper pressure-reducing ring band 7 subtracts with
Pressure ring promotes the speed of the upper and lower play of piston ring to add with 8 pressure reduction that can increase second gas ring groove 4 and oil ring groove ring bank about 5
Hurry up, coordinate the lifting of the flexible plunger ring and cylinder-barrel surface honing quality of optimization, can obviously reduce the consumption of lubricating oil of diesel engine
Rate.
Present configuration is simple, compact, reasonable, and the structure of new combustion chamber increased from oil nozzle the fuel oil for spraying and burn
Indoor extruding, shunting and disturbance, can effectively improve fuel oil and air in the indoor mixing uniformity of burning, when shortening burning
Between, diesel engine gas can be significantly reduced（CO、HC、NOX）And granule（PM）Discharge；Upper pressure-reducing ring band and lower pressure-reducing ring band can
Increase the pressure reduction of second gas ring groove and the upper and lower ring bank of oil ring groove, promote the speed of the upper and lower play of piston ring to accelerate, coordinate optimization
The lifting of flexible plunger ring and cylinder-barrel surface honing quality, can obviously reduce the specific oil consumption of diesel engine；Circular arc subtracts
Pressure ring groove increases the pressure reduction of the upper and lower ring bank of top compression ring, improves the downstream rate of top compression ring, increases sealing, reduces
Alter on oil gas in compression and enter cylinder.
Claims (2)
1. a kind of low emission non-rice habitats single cylinder diesel piston structure, including piston body（1）, piston body（1）Top is provided with burning
Room（2）, it is characterized in that：Combustor（3）Bottom centre is provided with central boss（9）, combustor（3）Side wall be provided with annular convex rib
（10）, combustor（3）Aditus laryngis at be provided with wedge angle thickness lip（11）；Piston body（1）Lateral wall piston land region from upper
First gas ring groove is sequentially provided with（3）, second gas ring groove（4）And oil ring groove（5）, first gas ring groove（3）With second gas ring groove
（4）Between ring be provided with decompression annular groove on the bank（6）, oil ring groove（5）Ring up and down be respectively equipped with pressure-reducing ring band on the bank（7）With under
Pressure-reducing ring band（8）.
2. low emission non-rice habitats single cylinder diesel piston structure as claimed in claim 1, is characterized in that：The decompression annular groove
（6）For circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084007.XA CN106677916A (en) | 2017-02-16 | 2017-02-16 | Low-emission non-road single-cylinder diesel engine piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084007.XA CN106677916A (en) | 2017-02-16 | 2017-02-16 | Low-emission non-road single-cylinder diesel engine piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106677916A true CN106677916A (en) | 2017-05-17 |
Family
ID=58861033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710084007.XA Pending CN106677916A (en) | 2017-02-16 | 2017-02-16 | Low-emission non-road single-cylinder diesel engine piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106677916A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4313368A (en) * | 1978-06-01 | 1982-02-02 | Societe Civile Promeyrat-Casteilla | Reciprocating piston |
| CN101040108A (en) * | 2004-10-14 | 2007-09-19 | 洋马株式会社 | Combustion chamber shape for direct injection type diesel engine |
| CN200961530Y (en) * | 2006-10-30 | 2007-10-17 | 常州亚美柯机械设备有限公司 | Diesel engine piston with decompression step |
| CN203035367U (en) * | 2012-12-17 | 2013-07-03 | 一汽海马动力有限公司 | Piston of engine cylinder and engine cylinder using piston |
| CN203114448U (en) * | 2013-01-09 | 2013-08-07 | 安徽全柴动力股份有限公司 | Piston ring capable of avoiding scuffing of cylinder bore |
| CN206522197U (en) * | 2017-02-16 | 2017-09-26 | 无锡华源凯马发动机有限公司 | Low emission non-rice habitats single cylinder diesel piston structure |
-
2017
- 2017-02-16 CN CN201710084007.XA patent/CN106677916A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4313368A (en) * | 1978-06-01 | 1982-02-02 | Societe Civile Promeyrat-Casteilla | Reciprocating piston |
| CN101040108A (en) * | 2004-10-14 | 2007-09-19 | 洋马株式会社 | Combustion chamber shape for direct injection type diesel engine |
| CN200961530Y (en) * | 2006-10-30 | 2007-10-17 | 常州亚美柯机械设备有限公司 | Diesel engine piston with decompression step |
| CN203035367U (en) * | 2012-12-17 | 2013-07-03 | 一汽海马动力有限公司 | Piston of engine cylinder and engine cylinder using piston |
| CN203114448U (en) * | 2013-01-09 | 2013-08-07 | 安徽全柴动力股份有限公司 | Piston ring capable of avoiding scuffing of cylinder bore |
| CN206522197U (en) * | 2017-02-16 | 2017-09-26 | 无锡华源凯马发动机有限公司 | Low emission non-rice habitats single cylinder diesel piston structure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170517 |