CN201420618Y - Multi-cylinder direct injection diesel engine piston - Google Patents
Multi-cylinder direct injection diesel engine piston Download PDFInfo
- Publication number
- CN201420618Y CN201420618Y CN2009200254290U CN200920025429U CN201420618Y CN 201420618 Y CN201420618 Y CN 201420618Y CN 2009200254290 U CN2009200254290 U CN 2009200254290U CN 200920025429 U CN200920025429 U CN 200920025429U CN 201420618 Y CN201420618 Y CN 201420618Y
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- Prior art keywords
- piston
- diesel engine
- direct injection
- cylinder direct
- injection diesel
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- Pistons, Piston Rings, And Cylinders (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model discloses a multi-cylinder direct injection diesel engine piston, which comprises a piston body, wherein a neck reducing dumbbell-shaped combustion chamber is arranged on the top ofthe piston body, the vortex intensity persistent time is improved, and is more than four times higher than that of a W-shaped combustion chamber through changing the shape of the combustion chamber, and the improvement of the vortex intensity persistent time is very favorable for later diffusional combustion of the diesel engine combustion process. Thereby, the problem of the coordinating relationship between the nitric oxide NOx and the smoke intensity and the particle PM discharge is effectively solved, a model machine has stable operation, normal display of each test parameter and no dieselengine fault caused by piston factors in the 1000 h reliability test process.
Description
Technical field
The utility model relates to a kind of parts and components of diesel engine, relates to a kind of multi-cylinder direct injection diesel engine piston specifically.
Background technique
R series cylinder diameter is 105～110mm multi-cylinder direct injection diesel engine piston, the application practice of going through in decades proves, this series piston is selected for use and aspect such as unitary construction in material, have that selection is reasonable, mechanical strength is high, excellent comprehensive performances, many diesel engine manufacturers of audient and diesel engine user's favorable comment deeply such as bear that the High Temperature High Pressure ability is strong, wear resistance and thermal diffusivity are good.But along with the domestic and international market was to the rising and the raising of piston in configuration aspects requirements such as low emissions combustion, reduction frictional losses of modern direct injection diesel engine of the supporting demand of high-power direct injection diesel engine in recent years, above-mentioned piston still has the following disadvantages:
1, because main structure original size parameters such as piston external diameter, compression height, piston pin hole are less than normal, the supporting application of incompatibility and more powerful diesel engine.
2, because directly spraying the shape and structure of firing chamber, piston head continues to use straight mouthful of traditional ω shape so far always, there is little and its short shortcoming of intake vortex strength survival of intake trubulence intensity in the firing chamber, thereby causes the deterioration of in-cylinder combustion quality and can not satisfy country at present to the requirement of technologies for low emissions of diesel engines (state II stage) index.
3, because the original piston first road annular groove does not take the section configuration of high temperature high voltage resistant protective measure and annular groove to establish unreasonable in choosing originally, the one, cause piston ring when work, to produce " pump oil " phenomenon, the adverse condition that causes serious waste of burn oil and soot to generate easily; The 2nd, the resistive connection glue ability that causes piston ring easily forms carbon deposit and makes that piston ring is stuck in groove to cause seal failure, makes that compression pressure descends in the cylinder, influence the power character and the low row property of diesel engine.
The model utility content
Problem to be solved in the utility model is to overcome above-mentioned shortcoming and defect, and a kind of multi-cylinder direct injection diesel engine piston is provided, and behind intensifying cylinder diameter and stroke, more high-power and satisfied certain emission request is arranged.
For addressing the above problem, the utility model by the following technical solutions:
A kind of multi-cylinder direct injection diesel engine piston comprises piston body, and it is characterized in that: the top of described piston body is provided with the firing chamber of reducing dumbbell-like shape.
Below be the utility model for further improvement of these options:
The volume of described firing chamber is 68～85 ± 2.5mL.
Piston body comprises firepower bank portion, endless belt portion and piston skirt, and described endless belt portion comprises first annular groove, second annular groove and oil ring groove.
The position of close firepower bank portion of described endless belt portion is provided with heat-resisting edge circle, and described first annular groove is arranged on the heat-resisting edge circle.
The sectional shape of described first annular groove is 15 ° of isosceles trapezoids, its height C
1Be 3.2 ± 0.50mm; The sectional shape of described second annular groove is a rectangle, its height C
2Be 3.0 ± 0.50mm; The sectional shape of oil ring groove is a rectangle, its height C
3Be 4.5 ± 0.50mm;
The overall height H of described piston body is 105～113mm, and the height h of firepower bank portion is 14.5～20.5mm, the height h of described endless belt portion
1Be 22～26mm; The diameter phi D of piston skirt
0Be φ 112～φ 125 ± 0.20mm.
Be provided with piston pin hole in the described piston body, the diameter phi D of described piston pin hole is φ 42～φ 50 ± 2.0mm.
Be respectively equipped with circlip groove in the two ends of described piston pin hole, the inner distance L of two circlip grooves is 92～102mm.
Described piston compression height H
1Be 67～73mm, mind-set main thrust face direction offset delta is 0.50～1.20mm in the described piston pin hole.
With the piston after the above-mentioned improvement, adorn the charge inter cooling model machine respectively and carry out the test stand performance test, its result is as follows:
1, by piston first annular groove is added heat-resisting edge circle, thereby it is too high and descend to have solved the hardness Yin Wendu of local aluminum alloy material herein, makes the problem of groove wear aggravation.
2, by change to the first annular groove section configuration, waving when utilizing pistons work makes piston ring also constantly do radial motion in annular groove, can constantly extrude gluey oil coke and carbon deposit in the annular groove gap, impel lubricant oil to upgrade, thereby make piston ring long-term work at high temperature and can will not encircle stuck because of annular groove gum deposit, carbon deposit, make the sealing of cylinder in shape all the time, guaranteed the compression pressure in the cylinder, for the lifting of power is laid a good foundation.
3, by the change to combustion-chamber shape, its strength of vortex survival phase improves more than 4 times than ω shape firing chamber, and is very favourable to the diffusive combustion in diesel engine combustion later stage.Thereby effectively dissolved the tradeoff between nitrogen oxide NOx and smoke intensity and the particle PM discharging.
4, by the expansion of piston, increased effective piston swept volume, made the piston displacement of diesel engine be increased to 7.82 present～9.16L by 6.49 original～7.69L to cylinder diameter and stroke.
5, model machine is in carrying out 1000h reliability trial process, and machine run is steady, and every test parameters shows normal, does not have the diesel engine fault that appearance causes because of the piston factor.
Below in conjunction with drawings and Examples the utility model is further described:
Description of drawings
Accompanying drawing 1 is the utility model embodiment's a structural representation;
Accompanying drawing 2 is that N-N in the accompanying drawing 1 is to sectional view.
Among the figure: the 1-piston body; The 2-firing chamber; The 3-piston skirt; 4-first annular groove; The heat-resisting edge circle of 5-; 6-second annular groove; The 7-oil ring groove; The 8-piston pin hole; 9-endless belt portion; 10-firepower bank portion; 11-pin-and-hole back-up ring.
Embodiment
Embodiment 1, as shown in Figure 1, a kind of multi-cylinder direct injection diesel engine piston, comprise piston body 1, the overall height H of described piston body is 110 ± 0.30mm, and the top of described piston body 1 is provided with the firing chamber 2 of reducing dumbbell-like shape, and the volume of described firing chamber 2 is 70 ± 1.0mL, piston body 1 comprises firepower bank portion 10, endless belt portion 9 and piston skirt 3, the diameter phi D of described piston skirt 3
0Be φ 112.87 ± 0.01mm, the height h of endless belt portion 9
1Be 25 ± 0.10mm, described endless belt portion 9 comprises first annular groove 4, second annular groove 6 and oil ring groove 7, the height h of firepower bank portion 10 is 15 ± 0.10mm, and described endless belt portion 9 is provided with heat-resisting edge circle 5 near the position of firepower bank portions 10, and described first annular groove 4 is arranged on the heat-resisting edge circle 5.
The sectional shape of described first annular groove 4 is 15 ° of isosceles trapezoids, its height C
1Be 3.205 ± 0.015mm; The sectional shape of described second annular groove 6 is a rectangle, its height C
2Be 3.0
+ 0.06 + 0.08Mm; The sectional shape of oil ring groove 7 is a rectangle, its height C
3Be 4.0
+ 0.03 + 0.05Mm; Be provided with piston pin hole 8 in the described piston body 1, described piston compression height H
1Be 70 ± 0.05mm, mind-set main thrust face direction offset delta is 0.60 ± 0.10mm in the described piston pin hole.As shown in Figure 2, the diameter phi D of described piston pin hole 8 is φ 45
+ 0.005 + 0.002Mm, the inner distance L that is respectively equipped with circlip groove 11, two circlip grooves in the two ends of described piston pin hole 8 is 95
-0 + 0.25Mm.
With the dress of the piston after above-mentioned improvement cylinder diameter is the HF6113IZLD of 113mm
1The charge inter cooling model machine carries out the test stand performance test, and its result is as follows, and by the change to combustion-chamber shape, its strength of vortex survival phase improves more than 4 times than ω shape firing chamber, and is very favourable to the diffusive combustion in diesel engine combustion later stage.Thereby effectively dissolved the tradeoff between nitrogen oxide NOx and smoke intensity and the particle PM discharging; By the expansion of piston to cylinder diameter and stroke, increased effective piston swept volume, make the piston displacement of diesel engine be increased to present 8.12L by original 7.69L; By above-mentioned improvement, HF6113IZLD
1The nominal power of-1500 favourable turn types is by original R6110IZLD
1Present 192kW/1500 has been brought up in-151kW/1500 commentaries on classics to be changeed; Model machine is in carrying out 1000h reliability trial process, and machine run is steady, and every test parameters shows normal, does not have the diesel engine fault that appearance causes because of the piston factor.
The sectional shape of described first annular groove 4 is 15 ° of isosceles trapezoids, its height C
1Be 3.205 ± 0.015mm; The sectional shape of described second annular groove 6 is a rectangle, its height C
2Be 3.0
+ 0.06 + 0.08Mm; The sectional shape of oil ring groove 7 is a rectangle, its height C
3Be 4.0
+ 0.03 + 0.05Mm; Be provided with piston pin hole 8 in the described piston body 1, described piston compression height H
1Be 70 ± 0.05mm, mind-set main thrust face direction offset delta is 0.60 ± 0.10mm in the described piston pin hole.As shown in Figure 2, the diameter phi D of described piston pin hole 8 is φ 45
+ 0.005 + 0.002Mm, the inner distance L that is respectively equipped with circlip groove 11, two circlip grooves in the two ends of described piston pin hole 8 is 95
-0 + 0.25Mm.
With the dress of the piston after above-mentioned improvement cylinder diameter is the HF6116IZLD of 116mm
1The charge inter cooling model machine carries out the test stand performance test, and its result is as follows, and by the change to combustion-chamber shape, its strength of vortex survival phase improves more than 4 times than ω shape firing chamber, and is very favourable to the diffusive combustion in diesel engine combustion later stage.Thereby effectively dissolved the tradeoff between nitrogen oxide NOx and smoke intensity and the particle PM discharging; By the expansion of piston to cylinder diameter and stroke, increased effective piston swept volume, make the piston displacement of diesel engine be increased to present 8.56L by original 7.69L; By above-mentioned improvement, HF6116IZLD
1The nominal power of-1500 favourable turn types is by original R6110IZLD
1-151kW/1500 has brought up to present 208kW/1500 to be changeed; Model machine is in carrying out 1000h reliability trial process, and machine run is steady, and every test parameters shows normal, does not have the diesel engine fault that appearance causes because of the piston factor.
Embodiment 3, as shown in Figure 1, a kind of multi-cylinder direct injection diesel engine piston, comprise piston body 1, the overall height H of described piston body is 110 ± 0.30mm, and the top of described piston body 1 is provided with the firing chamber 2 of reducing dumbbell-like shape, and the volume of described firing chamber 2 is 83 ± 1.0mL, piston body 1 comprises firepower bank portion 10, endless belt portion 9 and piston skirt 3, the diameter phi D of described piston skirt 3
0Be φ 119.87 ± 0.01mm, the height h of endless belt portion 9
1Be 25 ± 0.10mm, described endless belt portion 9 comprises first annular groove 4, second annular groove 6 and oil ring groove 7, the height h of firepower bank portion 10 is 15 ± 0.10mm, and described endless belt portion 9 is provided with heat-resisting edge circle 5 near the position of firepower bank portions 10, and described first annular groove 4 is arranged on the heat-resisting edge circle 5.The sectional shape of described first annular groove 4 is 15 ° of isosceles trapezoids, its height C
1Be 3.205 ± 0.015mm; The sectional shape of described second annular groove 6 is a rectangle, its height C
2Be 3.0
+ 0.06 + 0.08Mm; The sectional shape of oil ring groove 7 is a rectangle, its height C
3Be 4.0
+ 0.03 + 0.05Mm; Be provided with piston pin hole 8 in the described piston body 1, described piston compression height H
1Be 70 ± 0.05mm, mind-set main thrust face direction offset delta is 0.60 ± 0.10mm in the described piston pin hole.As shown in Figure 2, the diameter phi D of described piston pin hole 8 is φ 45
+ 0.005 + 0.002Mm, the inner distance L that is respectively equipped with circlip groove 11, two circlip grooves in the two ends of described piston pin hole 8 is 95
-0 + 0.25Mm.
With the dress of the piston after above-mentioned improvement cylinder diameter is the HF6120IZLD of 120mm
1The charge inter cooling model machine carries out the test stand performance test, and its result is as follows, and by the change to combustion-chamber shape, its strength of vortex survival phase improves more than 4 times than ω shape firing chamber, and is very favourable to the diffusive combustion in diesel engine combustion later stage.Thereby effectively dissolved the tradeoff between nitrogen oxide NOx and smoke intensity and the particle PM discharging; By the expansion of piston to cylinder diameter and stroke, increased effective piston swept volume, make the piston displacement of diesel engine be increased to present 9.16L by original 7.69L; By above-mentioned improvement, HF6120IZLD
1The nominal power of-1500 favourable turn types is by original R6110IZLD
1-151kW/1500 has brought up to present 230kW/1500 to be changeed; Model machine is in carrying out 1000h reliability trial process, and machine run is steady, and every test parameters shows normal, does not have the diesel engine fault that appearance causes because of the piston factor.
Claims (9)
1, a kind of multi-cylinder direct injection diesel engine piston comprises piston body (1), it is characterized in that: the top of described piston body (1) is provided with the firing chamber (2) of reducing dumbbell-like shape.
2, a kind of multi-cylinder direct injection diesel engine piston according to claim 1, it is characterized in that: the volume of described firing chamber (2) is 68～85 ± 2.5mL.
3, a kind of multi-cylinder direct injection diesel engine piston according to claim 1 and 2, it is characterized in that: piston body (1) comprises firepower bank portion (10), endless belt portion (9) and piston skirt (3), and described endless belt portion (9) comprises first annular groove (4), second annular groove (6) and oil ring groove (7).
4, a kind of multi-cylinder direct injection diesel engine piston according to claim 3 is characterized in that: described endless belt portion (9) is provided with heat-resisting edge circle (5) near the position of firepower bank portion (10), and described first annular groove (4) is arranged on the heat-resisting edge circle (5).
5, a kind of multi-cylinder direct injection diesel engine piston according to claim 4, it is characterized in that: the sectional shape of described first annular groove (4) is 15 ° of isosceles trapezoids, its height C
1Be 3.2 ± 0.50mm; The sectional shape of described second annular groove (6) is a rectangle, its height C
2Be 3.0 ± 0.50mm; The sectional shape of oil ring groove (7) is a rectangle, its height C
3Be 4.5 ± 0.50mm;
6, a kind of multi-cylinder direct injection diesel engine piston according to claim 3, it is characterized in that: the overall height H of described piston body is 105～113mm, the height h of firepower bank portion (10) is 14.5～20.5mm, the height h of described endless belt portion (9)
1Be 22～26mm; The diameter phi D of piston skirt (3)
0Be φ 112～φ 125 ± 0.20mm.
7, a kind of multi-cylinder direct injection diesel engine piston according to claim 6 is characterized in that: be provided with piston pin hole (8) in the described piston body (1), the diameter phi D of described piston pin hole (8) is φ 42～φ 50 ± 2.0mm.
8, a kind of multi-cylinder direct injection diesel engine piston according to claim 7, it is characterized in that: be respectively equipped with circlip groove (11) in the two ends of described piston pin hole (8), the inner distance L of two circlip grooves is 92～102mm.
9, a kind of multi-cylinder direct injection diesel engine piston according to claim 8 is characterized in that: described piston compression height H
1Be 67～73mm, mind-set main thrust face direction offset delta is 0.50～1.20mm in the described piston pin hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200254290U CN201420618Y (en) | 2009-05-18 | 2009-05-18 | Multi-cylinder direct injection diesel engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200254290U CN201420618Y (en) | 2009-05-18 | 2009-05-18 | Multi-cylinder direct injection diesel engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201420618Y true CN201420618Y (en) | 2010-03-10 |
Family
ID=41807270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200254290U Expired - Fee Related CN201420618Y (en) | 2009-05-18 | 2009-05-18 | Multi-cylinder direct injection diesel engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201420618Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444496A (en) * | 2011-12-09 | 2012-05-09 | 石家庄金刚内燃机零部件集团有限公司 | Pressurizing oil-saving type piston of diesel engine |
| CN102996279A (en) * | 2012-12-26 | 2013-03-27 | 淄博柴油机总公司 | Diesel engine and piston |
| CN109372650A (en) * | 2018-11-29 | 2019-02-22 | 汽解放汽车有限公司 | The piston-top surface structure of soot in a kind of reduction cylinder of diesel engine |
-
2009
- 2009-05-18 CN CN2009200254290U patent/CN201420618Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444496A (en) * | 2011-12-09 | 2012-05-09 | 石家庄金刚内燃机零部件集团有限公司 | Pressurizing oil-saving type piston of diesel engine |
| CN102444496B (en) * | 2011-12-09 | 2013-09-04 | 石家庄金刚内燃机零部件集团有限公司 | Pressurizing oil-saving type piston of diesel engine |
| CN102996279A (en) * | 2012-12-26 | 2013-03-27 | 淄博柴油机总公司 | Diesel engine and piston |
| CN109372650A (en) * | 2018-11-29 | 2019-02-22 | 汽解放汽车有限公司 | The piston-top surface structure of soot in a kind of reduction cylinder of diesel engine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100310 Termination date: 20140518 |