CN107905906A - A kind of diesel engine piston and diesel engine - Google Patents
A kind of diesel engine piston and diesel engine Download PDFInfo
- Publication number
- CN107905906A CN107905906A CN201711466250.4A CN201711466250A CN107905906A CN 107905906 A CN107905906 A CN 107905906A CN 201711466250 A CN201711466250 A CN 201711466250A CN 107905906 A CN107905906 A CN 107905906A
- Authority
- CN
- China
- Prior art keywords
- piston
- center line
- diesel engine
- rotating drum
- annular chamber
- 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.)
- Pending
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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
- F02F3/26—Pistons having combustion chamber in piston head
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/066—Details related to the fuel injector or the fuel spray the injector being located substantially off-set from the cylinder centre axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The present invention relates to Diesel Engine Technique Field, more particularly to a kind of diesel engine piston and diesel engine, combuster is set on piston, combustion chamber includes ω shapes rotating drum and is arranged at ω shape rotating drum upper ends and the annular chamber communicated therewith, the center line of annular chamber is overlapped with the center line of piston, and the center line of ω shape rotating drums is located at the center line of piston close to the side of fuel injector.The present invention is by the way that the center line of annular chamber to be arranged to overlap with the center line of piston, the centre symmetry of mixed gas in cylinder can be improved, reduce the risk of the mixed gas deviation cylinder sleeve side burning in cylinder sleeve, reduce heat transfer loss, reduce cylinder sleeve thermic load, reduce cylinder sleeve machine oil at the same time to be heated, delay aeronautic ATE；By side of the center line close to fuel injector that the center line of ω shape rotating drums is arranged to piston, the mixed gas in ω shape rotating drums can be made to reach best fit with oil spout oil beam, the drop point of oily beam will not be mapped to the top surface of piston or relatively low position in ω shape rotating drums.
Description
Technical field
The present invention relates to Diesel Engine Technique Field, more particularly to a kind of diesel engine piston and diesel engine.
Background technology
With rising steadily for fuel price, in the competition of power train in vehicle application system, people start to increasingly focus on
The problem of engine energy-saving lowers consumption.At present, two valve diesels are widely used in vehicle device and non-rice habitats product, and suitable
It will also continue to play a role in long a period of time, therefore how to improve the oil consumption of two valve diesels, expand two valve diesel oil
The market potential of machine and space, are the problems that this area is worth going into seriously.
In the prior art, as shown in Figure 1, the top of piston 10 ' opens up combuster, combustion chamber includes ω shape rotating drums
111 ' and the annular chamber 112 ' of 111 ' upper end of ω shapes rotating drum is communicated in, the center line of ω shapes rotating drum 111 ' and annular chamber 112 '
Collinearly, it is the first center line 12 ', the center line of piston 10 ' is the second center line 13 ', and the first center line 12 ' of combustion chamber is opposite
In the 13 ' eccentric setting of the second center line of piston 10 '；In addition, fuel injector by air flue arrangement form because being influenced on cylinder cap partially
The heart is arranged.This arrangement of the prior art, causes oily beam and gaseous mixture deviation cylinder side in cylinder sleeve, lives in addition
The influence of top surface squish flow is filled in, exacerbates the radial diffusion of oily beam, causes gaseous mixture to burn close to cylinder sleeve side, causes heat transfer to be damaged
Increase, oil consumption rise, the increase of cylinder sleeve thermic load are lost, and cylinder sleeve thermic load increase is also easy to cause aeronautic ATE；In addition, piston
Top surface squish flow is excessive, also be easy to cause gaseous mixture impact cylinder cap, causes cylinder cap thermic load higher.
Therefore, there is an urgent need for designing a kind of diesel engine piston, to reduce two valve diesel heat transfer losses, in-cylinder combustion is improved,
Achieve the purpose that to reduce oil consumption.
The content of the invention
It is an object of the invention to provide a kind of diesel engine piston and diesel engine, the center of mixed gas in cylinder can be improved
Symmetry, reduces the risk of the mixed gas deviation cylinder sleeve side burning in cylinder sleeve, reduces heat transfer loss.
For this purpose, the present invention uses following technical scheme：
A kind of diesel engine piston, sets combuster on the piston, the combustion chamber includes ω shapes rotating drum and setting
In the ω shapes rotating drum upper end and the annular chamber that communicates therewith, the center line weight of the center line of the annular chamber and the piston
Close, the center line of the ω shapes rotating drum is located at the center line of the piston close to the side of fuel injector.
By the way that the center line of annular chamber to be arranged to overlap with the center line of piston, i.e., annular chamber is arranged to along piston
Center line is symmetrical, can improve the centre symmetry of mixed gas in cylinder, reduces the mixed gas deviation cylinder sleeve in cylinder sleeve
The risk of side burning, reduces heat transfer loss, reduces cylinder sleeve thermic load, while reduces cylinder sleeve machine oil and be heated, and delays
Aeronautic ATE；By the way that the center line of ω shape rotating drums to be arranged to side of the center line close to fuel injector of piston, ω can be made
Mixed gas in shape rotating drum reaches best fit with oil spout oil beam, and the drop point of oily beam will not be mapped to the top surface of piston or be in
Relatively low position in ω shape rotating drums.
As the optimal technical scheme of diesel engine piston, between the top of the annular chamber side wall and the top surface of the piston
Connected using chamfering.
As the optimal technical scheme of diesel engine piston, the open-topped diameter of the annular chamber is straight with the piston
The ratio in footpath is 0.75~0.85.
The open top diameter of annular chamber has increased compared with the prior art, and larger open top diameter can be effective
Lower squish velocity, so as to reduce impact of the mixed gas to cylinder cap, reduce the thermic load of cylinder cap, reduce heat transfer loss.
As the optimal technical scheme of diesel engine piston, the bottom surface of the top surface and the annular chamber of the ω shapes rotating drum is total to
Face is set.
As the optimal technical scheme of diesel engine piston, the maximum gauge of the ω shapes rotating drum and the diameter of the piston
Ratio be 0.58~0.62.
As the optimal technical scheme of diesel engine piston, the throat diameter of the ω shapes rotating drum and the ω shapes rotating drum
Maximum gauge ratio be 0.95~0.98, which is necking rate.
Main purpose is rational to control strength of vortex and form to maintain strength of vortex, can make fuel in cylinder sleeve with
Air is sufficiently mixed and is burnt.
As the optimal technical scheme of diesel engine piston, the middle part of the ω shapes rotating drum has boss, the boss
A diameter of 3mm~5mm of top surface, the angle of the cone element of the boss is 120 °~140 °.
The setting of boss can eliminate the volume in burning dead band, make burning more abundant, to improve the dynamic property of diesel engine
With the discharge for reducing harmful substance.
As the optimal technical scheme of diesel engine piston, the top surface of piston described in the distance from bottom of the ω shapes rotating drum
Distance is 14mm~17mm.
As the optimal technical scheme of diesel engine piston, the top surface of the boss is apart from the distance of the top surface of the piston
5mm~8mm.
Optimal technical scheme as diesel engine piston combustion chamber.
A kind of diesel engine, including the diesel engine piston described in any of the above item.
The beneficial effect of the present invention compared with the prior art：
1) diesel engine piston provided by the invention, by the way that the center line of annular chamber to be arranged to the center line weight with piston
Close, i.e., annular chamber is arranged to symmetrical along the center line of piston, the centre symmetry of mixed gas in cylinder can be improved, drop
The risk of mixed gas deviation cylinder sleeve side burning in low cylinder sleeve, reduces heat transfer loss, reduces cylinder sleeve thermic load, at the same time
Reduce cylinder sleeve machine oil to be heated, delay aeronautic ATE；By the center line that the center line of ω shape rotating drums is arranged to piston
Close to the side of fuel injector, the mixed gas in ω shape rotating drums can be made to reach best fit with oil spout oil beam, oily beam falls
Point will not be mapped to the top surface of piston or relatively low position in ω shape rotating drums.
2) diesel engine piston provided by the invention, the open top diameter of its annular chamber have increased compared with the prior art
Greatly, larger open top diameter can effectively reduce squish velocity, so as to reduce impact of the mixed gas to cylinder cap, reduce
The thermic load of cylinder cap, reduces heat transfer loss.
Brief description of the drawings
Fig. 1 is the structure diagram for the diesel engine piston that the prior art provides；
Fig. 2 is the part-structure schematic diagram of diesel engine provided by the invention；
Fig. 3 is the structure diagram of diesel engine piston provided by the invention.
In figure：
10 '-piston；111 '-ω shape rotating drums；112 '-annular chamber；12 '-the first center lines；13 '-the second center lines；
10- pistons；20- cylinder sleeves；3-cylinder cap；40- fuel injectors；
11- combustion chambers；The first center lines of 12-；The second center lines of 13-；
111- ω shape rotating drums；112- annular chambers；
1111- boss.
Embodiment
Below in conjunction with the accompanying drawings technical scheme is further illustrated with embodiment.It is understood that this place
The specific embodiment of description is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to
It illustrate only part related to the present invention easy to describe, in attached drawing and not all.
The present invention provides a kind of diesel engine piston, as shown in Fig. 2, piston 10 is arranged in cylinder sleeve 20, and can be in cylinder sleeve 20
Inside move reciprocatingly, combuster 11 is opened up on piston 10, the top seal of cylinder sleeve 20 has cylinder cap 30, cylinder sleeve 20,30 and of cylinder cap
Piston 10 collectively forms the working space of cylinder；Fuel injector 40 is installed on cylinder cap 30, for spraying fuel oil to combustion chamber 11.
As shown in figure 3, combustion chamber 11 includes ω shapes rotating drum 111 and is arranged at 111 upper end of ω shapes rotating drum and connects with it
Logical annular chamber 112, the bottom surface of annular chamber 112 and the coplanar setting of top surface of ω shapes rotating drum 111, the center line of annular chamber 112
Overlapped with the center line of piston 10, the center line of the two is the second center line 13, the center line of the center line of ω shapes rotating drum 111
For the first center line 12, the first center line 12 is located at the second center line 13 close to the side of fuel injector.
By the way that the center line of annular chamber 112 to be arranged to overlap with the center line of piston 10, i.e., annular chamber 112 is arranged to
It is symmetrical along the center line of piston 10, the centre symmetry of mixed gas in cylinder can be improved, reduce the mixing in cylinder sleeve 20
The risk of gas deviation cylinder sleeve 20 side burning, reduces heat transfer loss, reduces 20 thermic load of cylinder sleeve, while reduce cylinder sleeve
20 machine oil are heated, and have delayed aeronautic ATE.
By the way that the center line of ω shapes rotating drum 111 to be arranged to the center line of piston 10 close to the side of fuel injector 40, energy
The mixed gas in ω shapes rotating drum 111 is enough set to reach best fit with oil spout oil beam, the drop point of oily beam will not be mapped to piston 10
Top surface or ω shapes rotating drum 111 in relatively low position.
In the present embodiment, connected between the top surface of the top of annular chamber 112 and piston 10 using chamfering, annular chamber 112
The ratio of diameter of open-topped diameter d1 and piston 1 be 0.75~0.85.The open top diameter d1 phases of annular chamber 112
Than having increased in the prior art, larger open top diameter can effectively reduce squish velocity, so as to effectively reduce mixed
The thermic load of impact and cylinder cap 30 of the gas to cylinder cap 30 is closed, reduces heat transfer loss.
In the present embodiment, the ratio of the maximum dimension D of ω shapes rotating drum 111 and the diameter of piston 1 is 0.58~0.62；
The throat diameter d2 of ω shapes rotating drum 111 and the ratio of the maximum dimension D of ω shapes rotating drum 111 are 0.95~0.98, the ratio
For necking rate, main purpose is rational to control strength of vortex and form to maintain strength of vortex, can make the fuel in cylinder sleeve 20
It is sufficiently mixed and is burnt with air.
Further, the middle part of ω shapes rotating drum 111 has boss 1111, and combustion can be eliminated by the setting of boss 1111
Burn the volume in area to death, make burning more abundant, with the discharge for improving the power performance of diesel engine and reducing harmful substance.
In the present embodiment, the distance H of 10 top surface of distance from bottom piston of ω shapes rotating drum 111 is 14mm~17mm, convex
The top surface diameter d3 of platform 1111 is 3mm~5mm, the top surface of boss 1111 apart from the top surface of piston 10 distance h1 for 5mm~
8mm, the angle α of the cone element of boss 1111 is 120 °~140 °.
The present invention also provides a kind of diesel engine, including above-mentioned diesel engine piston, the structure and operation principle of diesel engine piston
Ibid, details are not described herein.
Obviously, the above embodiment of the present invention is just for the sake of clear explanation example of the present invention, and it is pair to be not
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (10)
1. a kind of diesel engine piston, combuster (11) is set, the combustion chamber (11) includes the rotation of ω shapes on the piston (10)
Turn chamber (111) and be arranged at ω shapes rotating drum (111) upper end and the annular chamber (112) communicated therewith, it is characterised in that institute
The center line for stating annular chamber (112) is overlapped with the center line of the piston (10), the center line position of the ω shapes rotating drum (111)
In the piston (10) center line close to the side of fuel injector.
2. diesel engine piston according to claim 1, it is characterised in that the top of annular chamber (112) side wall and institute
State and connected using chamfering between the top surface of piston (10).
3. diesel engine piston according to claim 1 or 2, it is characterised in that the annular chamber (112) it is open-topped
The ratio of diameter and the diameter of the piston (10) is 0.75~0.85.
4. diesel engine piston according to claim 1, it is characterised in that the top surface of the ω shapes rotating drum (111) and institute
State the coplanar setting in bottom surface of annular chamber (112).
5. diesel engine piston according to claim 1, it is characterised in that the maximum gauge of the ω shapes rotating drum (111)
Ratio with the diameter of the piston (10) is 0.58~0.62.
6. diesel engine piston according to claim 5, it is characterised in that the throat diameter of the ω shapes rotating drum (111)
Ratio with the maximum gauge of the ω shapes rotating drum (111) is 0.95~0.98.
7. diesel engine piston according to claim 1, it is characterised in that the middle part of the ω shapes rotating drum (111) has
Boss (1111), a diameter of 3mm~5mm of the top surface of the boss (1111), the folder of the cone element of the boss (1111)
Angle is 120 °~140 °.
8. diesel engine piston according to claim 1, it is characterised in that the distance from bottom of the ω shapes rotating drum (111)
The distance of the top surface of the piston (10) is 14mm~17mm.
9. diesel engine piston according to claim 7, it is characterised in that the top surface of the boss (1111) is apart from the work
The distance for filling in the top surface of (10) is 5mm~8mm.
10. a kind of diesel engine, it is characterised in that including such as claim 1-9 any one of them diesel engine piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466250.4A CN107905906A (en) | 2017-12-28 | 2017-12-28 | A kind of diesel engine piston and diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466250.4A CN107905906A (en) | 2017-12-28 | 2017-12-28 | A kind of diesel engine piston and diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107905906A true CN107905906A (en) | 2018-04-13 |
Family
ID=61871984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711466250.4A Pending CN107905906A (en) | 2017-12-28 | 2017-12-28 | A kind of diesel engine piston and diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107905906A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879149A (en) * | 2021-01-25 | 2021-06-01 | 华中科技大学 | Asymmetric combustion chamber system suitable for high power density diesel engine |
| CN112879148A (en) * | 2021-01-25 | 2021-06-01 | 华中科技大学 | Asymmetric combustion chamber system suitable for high power density diesel engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB689585A (en) * | 1950-05-18 | 1953-04-01 | British Leyland Motor Corp | Improvements in internal combustion engines of the liquid fuel injection type |
| JPS567494B2 (en) * | 1977-03-25 | 1981-02-18 | ||
| CN205315110U (en) * | 2016-01-05 | 2016-06-15 | 南通航运职业技术学院 | Marine diesel combustion chamber |
| CN106762100A (en) * | 2016-11-29 | 2017-05-31 | 奇瑞汽车股份有限公司 | A kind of aviation diesel oil machine offset piston combustion chamber and its combustion system |
-
2017
- 2017-12-28 CN CN201711466250.4A patent/CN107905906A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB689585A (en) * | 1950-05-18 | 1953-04-01 | British Leyland Motor Corp | Improvements in internal combustion engines of the liquid fuel injection type |
| JPS567494B2 (en) * | 1977-03-25 | 1981-02-18 | ||
| CN205315110U (en) * | 2016-01-05 | 2016-06-15 | 南通航运职业技术学院 | Marine diesel combustion chamber |
| CN106762100A (en) * | 2016-11-29 | 2017-05-31 | 奇瑞汽车股份有限公司 | A kind of aviation diesel oil machine offset piston combustion chamber and its combustion system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879149A (en) * | 2021-01-25 | 2021-06-01 | 华中科技大学 | Asymmetric combustion chamber system suitable for high power density diesel engine |
| CN112879148A (en) * | 2021-01-25 | 2021-06-01 | 华中科技大学 | Asymmetric combustion chamber system suitable for high power density diesel engine |
| CN112879148B (en) * | 2021-01-25 | 2022-11-08 | 华中科技大学 | Asymmetric combustion chamber system suitable for high-power density diesel engine |
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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: 20180413 |