CN106014677A - Piston of engine - Google Patents
Piston of engine Download PDFInfo
- Publication number
- CN106014677A CN106014677A CN201610632356.6A CN201610632356A CN106014677A CN 106014677 A CN106014677 A CN 106014677A CN 201610632356 A CN201610632356 A CN 201610632356A CN 106014677 A CN106014677 A CN 106014677A
- Authority
- CN
- China
- Prior art keywords
- piston
- top surface
- groove
- electromotor
- combustion
- 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
Links
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
- F02F3/28—Other pistons with specially-shaped head
-
- 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 discloses a piston of an engine. A combustion chamber is formed in the head of the piston; at least one groove is formed in the top surface of the piston, and between the top surface edge of the combustion chamber and the outer edge on the top surface of the piston. As the structure of the top surface of the piston is optimized, on the premise that the structure of an air inlet passage and the oil-air mixing effect are kept unchanged, the squeezing and disturbing intensity of air flow in a cylinder and near the compression top dead center can be improved, the tubulence energy of air in the cylinder is increased, flame propagation speeds in the ignition delay period and the main combustion period are improved, and the duration of combustion is shortened. Therefore, the thermal efficiency and the performance of the engine are improved, the emission of unburned hydrocarbons is reduced, the fuel consumption of the engine is reduced, and energy conservation and fuel consumption cost reduction are facilitated; moreover, the structure optimization method can adapt to pistons and combustion chambers of different structural forms.
Description
Technical field
The present invention relates to engine art, particularly to the piston of a kind of electromotor.
Background technology
Along with the Abgasgesetz increasingly stringent to unburned hydrocarbons emission limit, and Fuel Consumption
Become the emphasis that industry is paid close attention to, reduce the discharge of electromotor unburned hydrocarbons and Fuel Consumption is the heaviest
Want, this target can be realized by the way of optimizing electromotor in-cylinder combustion at present.Piston is that electromotor is the heaviest
One of burning parts wanted, its version affects the flow distribution of air-flow in engine cylinder, thus shadow
Ring engine combustion.By piston combustion chamber shape, structure are optimized design, can reasonably group
Knit In Cylinder Flow, improve the average tubulence energy of air-flow, improve rate of flame propagation, increase burning speed
Rate, improves engine performance.
Electromotor realizes the motion of air-flow in cylinder by the coupling of air intake duct and piston combustion chamber structure.Cylinder
The liquid form of interior air-flow is eddy current and squeezes stream, at engine induction stroke and compression initial stage, air-flow in cylinder
Liquid form be eddy current, upon compression in phase cylinder the liquid form of air-flow be eddy current and squeeze stream, Qi Zhong
It is the strongest that compression top center squeezes stream.Eddy current is formed by helical intake, forms turbulent flow in compression process, along with work
The upper shifting eddy current of plug gradually dissipates；Crowded stream is clamp-oned piston combustion indoor by air-flow and is formed, and along combustor
Wall forms inverse squeezing and flows, and forms turbulent flow.Therefore tubulence energy intensity is relevant with eddy current and crowded intensity of flow.?
In the case of inlet structure is constant, optimization piston chamber structure can be passed through, improve compression top center
The crowded intensity of flow of neighbouring gas in the jar, increases gas disturbance, increases the tubulence energy of gas in the jar, improves fire
The propagation rate of flame, thus improve the thermal efficiency of electromotor, improve engine performance and reduce unburned hydrocarbon
Compound emission.
As Figure 1-3, the head of piston is provided with combustor 2, piston to the piston of the electromotor of prior art
End face 1 be to squeeze stream in plane, therefore delay period and main combustion period to be quickly converted to turbulent flow, gas in cylinder
The Turbulent Kinetic of stream is little, and flame transmission speed is slow, so that engine thermal efficiency reduces, is unfavorable for sending out
The performance of motivation, improves QI consumed and unburned hydrocarbons discharge.
The information being disclosed in this background section is merely intended to increase the reason of the general background to the present invention
Solve, and be not construed as recognizing or imply in any form that this information structure is for this area general technology
Prior art well known to personnel.
Summary of the invention
It is an object of the invention to provide the piston of a kind of electromotor, thus in overcoming existing engine cylinder
The Turbulent Kinetic of air-flow is little, and flame transmission speed is slow, QI consumed and high the lacking of unburned hydrocarbons discharge
Point.
For achieving the above object, the invention provides the piston of a kind of electromotor, the head of piston is provided with combustion
Burn room, on the end face of piston, be provided with at least between top edge and the outward flange of piston-top surface of combustor
One groove.
Preferably, in technique scheme, between top edge and the outward flange of piston-top surface of combustor
Being provided with the groove group that at least two is radially arranged, each groove group circumferentially arranges.
Preferably, in technique scheme, groove group is an annular recess.
Preferably, in technique scheme, groove group includes the spaced groove of at least two.
Preferably, in technique scheme, the cross section of groove is rectangle, square, circle or many
Limit shape.
Preferably, in technique scheme, between top edge and the outward flange of piston-top surface of combustor
It is provided with a groove group circumferentially arranged.
Preferably, in technique scheme, groove group is an annular recess.
Preferably, in technique scheme, groove group includes the spaced groove of at least two.
Preferably, in technique scheme, the cross section of groove is rectangle, square, circle or many
Limit shape.
Compared with prior art, there is advantages that
The application structure by optimization piston end face, is keeping inlet structure constant and air-fuel mixture effect
Improve the crowded stream of air-flow, strength of turbulence near cylinder in the case of the most constant, increase
The tubulence energy of gas in the jar, improves flame transmission speed in delay period and main combustion period, shortens combustion
The duration burnt, thus improve the thermal efficiency of electromotor, improve engine performance, and reduce not
Combustion hydrocarbon emission, reduces the Fuel Consumption of electromotor simultaneously, is conducive to saving the energy and fall
Low fuel consumption cost；Further, this structure optimization mode is applicable to piston and the combustion of different structure form
Burn room.
Accompanying drawing explanation
Fig. 1 is the front view of the piston of prior art.
Fig. 2 is the top view of the piston of prior art.
Fig. 3 is the axonometric chart of the piston of prior art.
Fig. 4 is the front view of the piston according to the present invention.
Fig. 5 is the top view of the piston according to the present invention.
Fig. 6 is the three-dimensional cutaway view of the piston according to the present invention.
Fig. 7 is the axonometric chart of the piston according to the present invention.
Fig. 8 is the comparison diagram of average tubulence energy in the air-flow of cylinder in prior art and the application.
Fig. 9 is the graph of a relation of tubulence energy and flame propagation velocity.
Main Reference Numerals illustrates:
1-piston-top surface, 2-combustor, 3-groove.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is described in detail, it is to be understood that this
The protection domain of invention is not limited by detailed description of the invention.
Explicitly indicate that unless otherwise other, otherwise in entire disclosure and claims, term " bag
Include " or its conversion as " comprising " or " including " etc. will be understood to comprise stated element or
Ingredient, and do not get rid of other element or other ingredient.
As shown in figs. 4-7, it is provided with combustor 2 according to the head of the piston of the specific embodiment of the invention, lives
On plug end face 1, between top edge and the outward flange of piston-top surface 1 of combustor 2, it is provided with at least one
Groove, between inward flange and the top edge of combustor of groove and the outward flange of groove and piston-top surface
Outward flange between be respectively provided with a certain distance.
As an embodiment, groove can be with piston integrally casting or be welded on piston-top surface 1.
Embodiment 1
It is provided with one between top edge and the outward flange of piston-top surface 1 of combustor 2 circumferentially to arrange
Groove group.
As an embodiment, as shown in figs. 4-7, this groove group is an annular recess 3, and this is ring-type recessed
Groove 3 can be concentric with combustor 2, it is also possible to eccentric relative to combustor 2.In this embodiment, ring
The cross section of shape groove 3 can be regular shape, as being rectangle, square, circular or polygon etc.,
Can also be irregularly shaped.This annular recess 3 can closer to the top edge of combustor or closer to
The outward flange of piston-top surface 1.
As another embodiment, this groove group includes the spaced groove of at least two, such as, is somebody's turn to do
Groove group can be uniformly distributed in combustor 2 around, forms an annulus, and this annulus can be with combustion
Burn room 2 concentric, it is also possible to eccentric relative to combustor 2.In this embodiment, the cross section of groove can
To be regular shape, as being rectangle, square, circular or polygon etc., it is also possible to be irregular shape
Shape.
Embodiment 2
It is provided with at least two between top edge and the outward flange of piston-top surface 1 of combustor 2 radially to arrange
The groove group of row, each groove group circumferentially arranges.
As an embodiment, it is provided with between top edge and the outward flange of piston-top surface 1 of combustor 2
At least two annular recess, this annular recess can be concentric with combustor 2, it is also possible to relative to combustor 2
Eccentric.In this embodiment, the cross section of annular recess can be regular shape, as being rectangle, just
Square, circular or polygon etc., it is also possible to be irregularly shaped.
As another embodiment, each groove group can include the groove that at least two circumferentially arranges,
For example, it is possible to be uniformly distributed in combustor 2 around, forming an annulus, this annulus can be with combustion
Burn room 2 concentric, it is also possible to eccentric relative to combustor 2.The circumferential position of the corresponding recesses in two groups can
With identical or mutually stagger.In this embodiment, the cross section of each groove can be regular shape, as
Be rectangle, square, circular or polygon etc., it is also possible to be irregularly shaped.
As another embodiment, often the groove in group can be arranged in combustor 2 around unevenly.
Fig. 8 is the comparison diagram of the average tubulence energy of air-flow (in cylinder in cylinder in prior art and the application
Flowing result of calculation).As can be seen from Figure 7, processing groove structure on piston-top surface 1 can be to a certain extent
Improve the average tubulence energy of air-flow in cylinder.Fig. 9 is the graph of a relation of tubulence energy and flame propagation velocity, tubulence energy
The biggest, flame propagation velocity is the fastest.Therefore, piston-top surface 1 is processed groove structure and can improve fire
The spread speed of flame.
The application structure by optimization piston end face, is keeping inlet structure constant and air-fuel mixture effect
Improve the crowded stream of air-flow, strength of turbulence near cylinder in the case of the most constant, increase
The tubulence energy of gas in the jar, improves flame transmission speed in delay period and main combustion period, shortens combustion
The duration burnt, thus improve the thermal efficiency of electromotor, improve engine performance, and reduce not
Combustion hydrocarbon emission, reduces the Fuel Consumption of electromotor simultaneously, is conducive to saving the energy and fall
Low fuel consumption cost；Further, this structure optimization mode is applicable to piston and the combustion of different structure form
Burn room.
The aforementioned description to the specific illustrative embodiment of the present invention illustrates that and the purpose of illustration.
These descriptions are not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned
Teaching, can much change and change.The purpose selected exemplary embodiment and describe exists
In explaining the certain principles of the present invention and actual application thereof, so that those skilled in the art can be real
Now and utilize the various different exemplary of the present invention and various different selection and change.
The scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (9)
1. a piston for electromotor, the head of described piston is provided with combustor, it is characterised in that described
On the end face of piston, between top edge and the outward flange of piston-top surface of described combustor, it is provided with at least one
Individual groove.
The piston of electromotor the most according to claim 1, it is characterised in that the top of described combustor
The groove group that at least two is radially arranged it is provided with, often between the outward flange of edge, face and described piston-top surface
Individual groove group circumferentially arranges.
The piston of electromotor the most according to claim 2, it is characterised in that described groove group is one
Individual annular recess.
The piston of electromotor the most according to claim 2, it is characterised in that described groove group includes
The spaced groove of at least two.
5. according to the piston of the electromotor described in claim 3 or 4, it is characterised in that described groove
Cross section is rectangle, square, circular or polygon.
The piston of electromotor the most according to claim 1, it is characterised in that the top of described combustor
A groove group circumferentially arranged it is provided with between the outward flange of edge, face and described piston-top surface.
The piston of electromotor the most according to claim 6, it is characterised in that described groove group is one
Individual annular recess.
The piston of electromotor the most according to claim 6, it is characterised in that described groove group includes
The spaced groove of at least two.
9. according to the piston of the electromotor described in claim 7 or 8, it is characterised in that described groove
Cross section is rectangle, square, circular or polygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610632356.6A CN106014677A (en) | 2016-08-04 | 2016-08-04 | Piston of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610632356.6A CN106014677A (en) | 2016-08-04 | 2016-08-04 | Piston of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106014677A true CN106014677A (en) | 2016-10-12 |
Family
ID=57134453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610632356.6A Pending CN106014677A (en) | 2016-08-04 | 2016-08-04 | Piston of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106014677A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678870A (en) * | 2018-05-09 | 2018-10-19 | 中国第汽车股份有限公司 | The piston-top surface structure of soot in a kind of reduction cylinder of diesel engine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57181926A (en) * | 1981-05-01 | 1982-11-09 | Nissan Motor Co Ltd | Diesel engine with direct injection |
| JP2001349221A (en) * | 2000-06-08 | 2001-12-21 | Osaka Gas Co Ltd | Compression self-ignition engine |
| JP2004263664A (en) * | 2003-03-04 | 2004-09-24 | Osaka Gas Co Ltd | Compression ignition engine |
| JP2010112347A (en) * | 2008-11-10 | 2010-05-20 | Mitsubishi Fuso Truck & Bus Corp | Piston for direct injection type diesel internal combustion engine |
| CN104136717A (en) * | 2012-02-20 | 2014-11-05 | 奈赤－泵和系统有限责任公司 | Rotary piston |
| CN104271916A (en) * | 2012-04-13 | 2015-01-07 | 卡特彼勒能源方案有限公司 | Piston of an internal combustion engine |
| CN204371508U (en) * | 2014-12-26 | 2015-06-03 | 大连滨城活塞制造有限公司 | A kind of insulating piston top |
| CN204476583U (en) * | 2015-02-03 | 2015-07-15 | 安徽中鼎动力有限公司 | The horizontally-opposed piston of a kind of two-stroke, opposed-cylinder engine outer piston |
| CN205858508U (en) * | 2016-08-04 | 2017-01-04 | 广西玉柴机器股份有限公司 | The piston of electromotor |
-
2016
- 2016-08-04 CN CN201610632356.6A patent/CN106014677A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57181926A (en) * | 1981-05-01 | 1982-11-09 | Nissan Motor Co Ltd | Diesel engine with direct injection |
| JP2001349221A (en) * | 2000-06-08 | 2001-12-21 | Osaka Gas Co Ltd | Compression self-ignition engine |
| JP2004263664A (en) * | 2003-03-04 | 2004-09-24 | Osaka Gas Co Ltd | Compression ignition engine |
| JP2010112347A (en) * | 2008-11-10 | 2010-05-20 | Mitsubishi Fuso Truck & Bus Corp | Piston for direct injection type diesel internal combustion engine |
| CN104136717A (en) * | 2012-02-20 | 2014-11-05 | 奈赤－泵和系统有限责任公司 | Rotary piston |
| CN104271916A (en) * | 2012-04-13 | 2015-01-07 | 卡特彼勒能源方案有限公司 | Piston of an internal combustion engine |
| CN204371508U (en) * | 2014-12-26 | 2015-06-03 | 大连滨城活塞制造有限公司 | A kind of insulating piston top |
| CN204476583U (en) * | 2015-02-03 | 2015-07-15 | 安徽中鼎动力有限公司 | The horizontally-opposed piston of a kind of two-stroke, opposed-cylinder engine outer piston |
| CN205858508U (en) * | 2016-08-04 | 2017-01-04 | 广西玉柴机器股份有限公司 | The piston of electromotor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678870A (en) * | 2018-05-09 | 2018-10-19 | 中国第汽车股份有限公司 | The piston-top surface structure of soot in a kind of reduction cylinder of diesel engine |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161012 |
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| RJ01 | Rejection of invention patent application after publication |