CN107201967A - Piston of combustion chamber structure - Google Patents
Piston of combustion chamber structure Download PDFInfo
- Publication number
- CN107201967A CN107201967A CN201710651890.6A CN201710651890A CN107201967A CN 107201967 A CN107201967 A CN 107201967A CN 201710651890 A CN201710651890 A CN 201710651890A CN 107201967 A CN107201967 A CN 107201967A
- Authority
- CN
- China
- Prior art keywords
- oil circuit
- piston
- branch
- combustion chamber
- rotor
- 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.)
- Granted
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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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of piston of combustion chamber structure, including：Piston；Rotor is adjusted, rotation is arranged in piston, and part is exposed from top land, and the volume of exposed portion changes with the rotation of regulation rotor；Connecting rod, is divided into bar portion and head, and head forms through hole, with piston pin grafting, connecting rod is interior to form oil circuit, and oil circuit is divided into working connection, first branch's oil circuit and second branch's oil circuit, working connection is located in bar portion, and first branch's oil circuit is located in the side of head, and second branch's oil circuit is located in the opposite side of head；Each oil circuit junction is provided with valve.The Volume Changes that rotor exposes, and top land is combustion chamber, the Volume Changes change combustion chamber volume, with the purpose for the intensity for realizing change burning, meanwhile, the in-cylinder air motion when regulation of the rotation suitably is burnt makes burning highly efficient reliable.Different regulation operations are carried out under different operating modes, so that in the case where increasing fuel economy.
Description
Technical field
The present invention relates to engine, more particularly to a kind of piston of combustion chamber structure.
Background technology
Start compression ratio to refer generally to cylinder total volume and combustion chamber volume ratio, be the important ginseng of measured engine performance
Number.When engine compresses are higher, the air pressure and temperature when compression ends in cylinder are higher, beneficial to catching fire for fuel,
The cold-start performance and combustibility of engine are preferable, but now maximum combustion pressure and the rate of pressure rise can also increase therewith,
So that the work of engine becomes rough, so as to add N0 in combustion processXProduction rate and discharge capacity.If compression ratio compared with
Low, the pressure and temperature of cylinder air is relatively low when compression ends can cause aeroperformance and combustibility to be deteriorated, so as to cause
Fuel consumption increase.Therefore, engine compression ratio needs to consider that many influence factors carry out compromise determination.
The compression ratio of current engine is usually to change, because combustion chamber volume and the swept volume parameter of cylinder
All it is fixed value.Therefore, under the different combustion cases of engine, cylinder interior air-flow is typically more stable can not to tackle complexity
Engine operating condition, it is impossible to optimized according to engine operating condition, cause economy to decline.
The content of the invention
It is an object of the invention to provide a kind of piston of combustion chamber structure, burning can be made highly efficient reliable, it is possible to root
It is adjusted according to operating mode, improves economic performance.
The piston of combustion chamber structure of the present invention includes：Piston；Rotor is adjusted, rotation is arranged in the piston, and
Part is exposed from the top land, and the volume of exposed portion changes with the rotation of the regulation rotor；Connecting rod, passes through piston
Pin is connected with the piston rotation, and the connecting rod is located at below the regulation rotor；The connecting rod is divided into bar portion and head,
The head forms through hole, and with the piston pin grafting, the connecting rod is interior to form oil circuit, and the oil circuit is divided into working connection, first
Branch's oil circuit and second branch's oil circuit, the working connection are located in the bar portion, and first branch oil circuit is located at the head
In side, and head described in insertion forms the first nozzle opening, and second branch oil circuit is located in the head opposite side, and passes through
The logical head forms the second nozzle opening, and first nozzle opening and second nozzle opening are respectively from different directions towards described
Adjust rotor；First branch oil circuit and second branch's oil circuit are connected with the working connection respectively, in first branch oil
Road, the junction of second branch's oil circuit and the working connection, are provided with valve.
Piston of combustion chamber structure as described above, wherein, there is annular between the top land and the regulation rotor
Spring is provided with groove, the annular groove.
Piston of combustion chamber structure as described above, wherein, the regulation rotor top and the part of the piston contact, shape
The scrobicular ring of Cheng Youfang gas blowbies.
Piston of combustion chamber structure as described above, wherein, when engine oil pressure is between 150KPa to 250KPa,
Oil in valve connection first branch oil circuit and the working connection, oil circuit impacts described by first nozzle opening
Rotor is adjusted, it is rotated in a first direction.
Piston of combustion chamber structure as described above, wherein, when engine oil pressure is more than or equal to 250KPa, the valve
Oil in door connection second branch oil circuit and the working connection, oil circuit impacts the regulation by second nozzle opening and turned
Son, is rotated in a second direction, it.
Piston of combustion chamber structure as described above, wherein, when engine oil pressure is less than 150KPa, valve closes institute
Connecting for first branch's oil circuit and the working connection is stated, connecting for second branch oil circuit and the working connection is closed.
Piston of combustion chamber structure as described above, wherein, the valve is electronic valve.
The rotor of the present invention, which is rotated, causes the Volume Changes that it exposes from top land, and top land exactly combustion chamber,
The Volume Changes change combustion chamber volume, with the purpose for the intensity for realizing change burning, meanwhile, the regulation combustion of the rotation suitably
In-cylinder air motion during burning, makes burning highly efficient reliable；The setting of oil circuit can realize the regulation control rotated to rotor.
Different regulation operations are carried out under different operating modes.While the temperature of piston when can reduce engine big load situation, and then
Reduction burning indoor temperature, so as in the case where increasing fuel economy, also reduce the generation of pinking in engine cylinder.
Brief description of the drawings
Fig. 1 is the first sectional view of piston of combustion chamber structure of the present invention；
Fig. 2 is the sectional view under piston of combustion chamber construction rotor rotary state of the present invention；
Fig. 3 is enlarged drawing at Fig. 1 A；
Fig. 4 is the stereogram of piston of combustion chamber structure of the present invention；
Fig. 5 is the second sectional view of piston of combustion chamber structure of the present invention；
Fig. 6 is enlarged drawing at Fig. 5 B；
Fig. 7 is the 3rd sectional view of piston of combustion chamber structure of the present invention.
Reference：
It is piston 1, regulation rotor 2, connecting rod 3, working connection 4, first branch's oil circuit 51, second branch's oil circuit 52, valve 6, anti-
The scrobicular ring 8 of gas blowby, spring 9, opening 11.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
The present invention discloses a kind of piston of combustion chamber structure, referring to Fig. 1 to Fig. 7, including：Piston 1, regulation rotor 2, connecting rod 3
With oil circuit of the formation in connecting rod 3.
As shown in figure 1, being arranged in the piston 1 of rotating of regulation rotor 2, and part is revealed from the top of the piston 1
Go out, the volume of exposed portion changes with the rotation of the regulation rotor 2；Rotated according to different operating modes, regulation burning
The volume of room.Referring to Fig. 4, the top of piston 1 will necessarily have an opening 11, expose for regulation rotor 2.
Connecting rod 3 is rotated with the piston 1 by piston pin 31 and is connected, and the connecting rod 3 is located under the regulation rotor 2
Side；3 points of the connecting rod is bar portion and head, and the head forms through hole, and the grafting of piston pin 31, shape in the connecting rod 3
Into oil circuit, the oil circuit is divided into working connection 4, first branch's oil circuit 51 and second branch's oil circuit 52, and the working connection 4 is located at described
In bar portion, first branch oil circuit 51 is located in the head side, and head described in insertion forms the first nozzle opening, described
Second branch's oil circuit 52 is located in the head opposite side, and head described in insertion forms the second nozzle opening, first oil spout
Hole and second nozzle opening are respectively from different directions towards the regulation rotor 2；First branch oil circuit 51 and described
Two branch's oil circuits 52 are connected with the working connection 4 respectively, in first branch oil circuit 51, second branch oil circuit 52 and institute
The junction of working connection 4 is stated, valve 6 is provided with.
Referring to Fig. 1, the tangent plane of vertical piston pin 31 is done, oil circuit does orthographic projection on tangent plane, it is main based on the orthographic projection
The tail end of oil circuit 4 connects first branch's oil circuit 51 and second branch's oil circuit 52, Liang Ge branches in the left and right sides respectively by valve 6
The head of oil circuit never homonymy insertion connecting rod 2, forms the first nozzle opening and the second nozzle opening respectively, and never homonymy towards regulation
Rotor 2, from towards as can be seen that two nozzle openings can impact rotor from different directions, rotor is rotated towards different directions.
Have between the top of piston 1 and the regulation rotor 2 in annular groove, the annular groove and be provided with spring 9.Spring 9
Structure chart 5 arrive Fig. 7, the section in Fig. 5 is vertical with Fig. 1 section, and the axis of piston pin 31 is passed through in Fig. 5 section.
Fig. 1 section rotates the section that Fig. 5 is formed after 90 degree in other words.Fig. 7 section is parallel with Fig. 1 section, but interception
Position and Fig. 1 in difference.
It can be playbacked with auxiliary adjustment rotor 3.The part that the top of regulation rotor 2 is contacted with the piston 1, is formed with anti-
The scrobicular ring 8 of gas blowby.Referring to Fig. 3, the scrobicular ring 8 of the anti-gas blowby is primarily to prevent what is contacted from regulation rotor 2 with piston 1
There is the situation of gas blowby in part.
Illustrate several frequently seen operating mode below.
The first, when engine oil pressure is between 150KPa to 250KPa, the valve 6 connects described first point
Oil in branch oil circuit 51 and the working connection 4, oil circuit impacts the regulation rotor 2 by first nozzle opening, makes it along the
One direction is rotated.
Such case is usually under low rotation speed large torque operating mode, due to the engine oil pressure and engine of engine oil pump
Rotating speed is relevant, in the case of the slow-speed of revolution, and the engine oil pressure of engine is relatively low.
Second, when engine oil pressure is more than or equal to 250KPa, the valve 6 connects second branch oil circuit
52 and the working connection 4, the oil in oil circuit impacts the regulation rotor 2 by second nozzle opening, makes it in a second direction
Rotate.
Such case is typically betided under the high-power operating mode of high rotating speed, because the engine oil pressure of engine oil pump is with starting
Machine rotating speed is relevant, in the case of high-revolving, and the engine oil pressure of engine is higher.
The third, when engine oil pressure is less than 150KPa, valve 6 closes first branch oil circuit 52 and described
The connection of working connection 4, closing second branch oil circuit 52 is connected with the working connection 4.
Such case is generally normal operating conditions, because engine oil pressure is relatively low, and the fuel tap on connecting rod is simultaneously not turned on, regulation
Rotor 2 is not worked, and the demand of normal working of engine can be met by now adjusting the plane of rotor 2 composition combustion chamber.
The first is with second of operating mode, and the rotation of regulation rotor 2 may refer to Fig. 2.Show that arrow C is represented in Fig. 2
Regulation rotor 2 in first direction, arrow D second directions, Fig. 2 is rotated to first direction.
Rotor 2 is adjusted in both operating modes, by momentum effect, occurs to swing (rotation).The general rotor 2 that adjusts is from work
The part that plug 1 exposes is arcwall face, it may be said which constitute the part of combustion chamber wall surface, and the arcwall face can guide improvement to burn
Chamber interior air current flow form, optimizes compression ratio when burning and improve burning, so as to improve the fuel economy of engine.
The valve 6 is electronic valve.Can also be machinery valve, such as in above-mentioned three kinds of operating modes, engine oil pressure is different, can
With according to different oil pressure force value, the connection situation of control valve.How the specific of valve 6 realizes connected relation from structure,
The application is not repeated.
Construction, feature and the action effect of the present invention, above institute is described in detail according to the embodiment shown in schema above
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range shown in drawing, it is every according to structure of the invention
Want made change, or be revised as the equivalent embodiment of equivalent variations, still without departing from specification with illustrating during covered spirit,
All should be within the scope of the present invention.
Claims (7)
1. a kind of piston of combustion chamber structure, it is characterised in that including：
Piston (1)；
Adjust rotor (2), rotation is arranged in the piston (1), and part is exposed at the top of the piston (1), is exposed
Partial volume changes with the rotation of the regulation rotor (2)；
Connecting rod (3), is rotated with the piston (1) by piston pin (31) and is connected, and the connecting rod (3) is located at the regulation and turned
Below sub (2)；
The connecting rod (3) is divided into bar portion and head, and the head forms through hole, with the piston pin (31) grafting, the connecting rod
(3) oil circuit is formed in, the oil circuit is divided into working connection (4), first branch's oil circuit (51) and second branch's oil circuit (52), the master
Oil circuit (4) is located in the bar portion, and first branch oil circuit (51) is located in the head side, and head shape described in insertion
Into the first nozzle opening, second branch oil circuit (52) is located in the head opposite side, and head described in insertion forms second
Nozzle opening, first nozzle opening and second nozzle opening are respectively from different directions towards the regulation rotor (2)；
First branch oil circuit (51) and second branch oil circuit (52) are connected with the working connection (4) respectively, described
The junction of first branch's oil circuit (51), second branch oil circuit (52) and the working connection (4), is provided with valve (6).
2. piston of combustion chamber structure according to claim 1, it is characterised in that
Have at the top of the piston (1) between the regulation rotor (2) in annular groove, the annular groove and be provided with spring (9).
3. piston of combustion chamber structure according to claim 1, it is characterised in that
The part contacted at the top of the regulation rotor (2) with the piston (1), is formed with the scrobicular ring (8) of anti-gas blowby.
4. piston of combustion chamber structure according to claim 1, it is characterised in that
When engine oil pressure is between 150KPa to 250KPa, the valve (6) connects first branch oil circuit
(51) and the working connection (4), the oil in oil circuit impacts the regulation rotor (2) by first nozzle opening, makes it along the
One direction is rotated.
5. piston of combustion chamber structure according to claim 1, it is characterised in that
When engine oil pressure is more than or equal to 250KPa, valve (6) connection second branch oil circuit (52) and institute
The oil stated in working connection (4), oil circuit impacts the regulation rotor (2) by second nozzle opening, it is turned in a second direction
It is dynamic.
6. piston of combustion chamber structure according to claim 1, it is characterised in that
In engine oil pressure when less than 150KPa, the valve (6) closes first branch oil circuit (52) and described
The connection of working connection (4), closing second branch oil circuit (52) is connected with the working connection (4).
7. piston of combustion chamber structure according to claim 1, it is characterised in that
The valve (6) is electronic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651890.6A CN107201967B (en) | 2017-08-02 | 2017-08-02 | Piston of combustion chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651890.6A CN107201967B (en) | 2017-08-02 | 2017-08-02 | Piston of combustion chamber structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107201967A true CN107201967A (en) | 2017-09-26 |
| CN107201967B CN107201967B (en) | 2019-05-21 |
Family
ID=59911492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710651890.6A Active CN107201967B (en) | 2017-08-02 | 2017-08-02 | Piston of combustion chamber structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107201967B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3742321A1 (en) * | 1986-12-27 | 1988-07-28 | Volkswagen Ag | Device for controlling compression |
| JP2000186514A (en) * | 1998-12-24 | 2000-07-04 | Toyota Motor Corp | Variable compression ratio device for internal combustion engine |
| CN1525052A (en) * | 2003-02-24 | 2004-09-01 | �ղ��Զ�����ʽ���� | Reciprocating engine with a variable compression ratio mechanism |
| CN101109321A (en) * | 2007-08-08 | 2008-01-23 | 陈晨 | Self-adaption compression ratio variable engine |
| CN201443440U (en) * | 2009-05-26 | 2010-04-28 | 李志强 | Variable compression ratio piston |
| CN102155274A (en) * | 2010-11-16 | 2011-08-17 | 丛培伟 | Continuously variable compression ratio engine and power output device thereof |
| JP2014043839A (en) * | 2012-08-28 | 2014-03-13 | Mitsubishi Motors Corp | Piston of internal combustion engine |
| CN104454181A (en) * | 2014-10-16 | 2015-03-25 | 上海鲁交测控科技有限公司 | Oil pressure controlled type engine displacement variable system |
-
2017
- 2017-08-02 CN CN201710651890.6A patent/CN107201967B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3742321A1 (en) * | 1986-12-27 | 1988-07-28 | Volkswagen Ag | Device for controlling compression |
| JP2000186514A (en) * | 1998-12-24 | 2000-07-04 | Toyota Motor Corp | Variable compression ratio device for internal combustion engine |
| CN1525052A (en) * | 2003-02-24 | 2004-09-01 | �ղ��Զ�����ʽ���� | Reciprocating engine with a variable compression ratio mechanism |
| CN101109321A (en) * | 2007-08-08 | 2008-01-23 | 陈晨 | Self-adaption compression ratio variable engine |
| CN201443440U (en) * | 2009-05-26 | 2010-04-28 | 李志强 | Variable compression ratio piston |
| CN102155274A (en) * | 2010-11-16 | 2011-08-17 | 丛培伟 | Continuously variable compression ratio engine and power output device thereof |
| JP2014043839A (en) * | 2012-08-28 | 2014-03-13 | Mitsubishi Motors Corp | Piston of internal combustion engine |
| CN104454181A (en) * | 2014-10-16 | 2015-03-25 | 上海鲁交测控科技有限公司 | Oil pressure controlled type engine displacement variable system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107201967B (en) | 2019-05-21 |
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