CN107100756A - A kind of piston for directly jetting gasoline engine channel-style combustion chamber - Google Patents
A kind of piston for directly jetting gasoline engine channel-style combustion chamber Download PDFInfo
- Publication number
- CN107100756A CN107100756A CN201710152257.2A CN201710152257A CN107100756A CN 107100756 A CN107100756 A CN 107100756A CN 201710152257 A CN201710152257 A CN 201710152257A CN 107100756 A CN107100756 A CN 107100756A
- Authority
- CN
- China
- Prior art keywords
- piston
- combustion chamber
- top land
- gasoline engine
- air
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 241001270131 Agaricus moelleri Species 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 7
- 230000002776 aggregation Effects 0.000 abstract description 3
- 238000004220 aggregation Methods 0.000 abstract description 3
- 239000004071 soot Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
Landscapes
- 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 present invention relates to a kind of piston for directly jetting gasoline engine channel-style combustion chamber, the top of piston is made up of top land plane, top land concave surface, top land projection and the knuckle outer between them, the outer diameter D 1 of top land is 70mm~90mm, the piston of the present invention, its top structure shape is reasonable in design；Piston top plane is engaged with the squish face of cylinder cap baseplane, the air-flow of near is set to be more concentrated on combustion chamber center, raised and the combustion chamber cambered surface is engaged, and can also play a part of making the air-flow of near to be more concentrated on combustion chamber center；Passage on air-flow sprue can reduce gas in the jar as far as possible and move the aggregation of loss of energy and oil droplet in piston face, reach the purpose for reducing HC and SOOT discharges；Meanwhile, high gas kinetic energy can effectively facilitate air-fuel mixture, form suitable mixture strength distribution.
Description
Technical field
The invention belongs to combustion system of engine technical field, and in particular to one kind is used for the burning of directly jetting gasoline engine channel-style
The piston of room.
Background technology
At present, the car ownership of China increases sharply, and the demand of influence and oil to environment is increasing, energy-conservation
Emission reduction situation is increasingly severe.Therefore, China has also formulated strict discharge and fuel economy regulation, and to improve efficiency of combustion, reduction
Discharge and oil consumption are attached most importance to as the core of engine development with the exploitation of combustion system.The exploitation master of combustion system of engine
To include chamber structure design, the design of gas handling system design, exhaust system design, oil supply system and ignition system design, its
Middle core is chamber structure design.Therefore, oil consumption how is reduced, that improves that efficiency of combustion is that Combustion chamber design faces great asks
Topic.
Piston is the critical component moved reciprocatingly in air cylinder sleeve of engine, and its top surface combines composition with engine cylinder cap
Combustion chamber.Whether the structure design of piston-top surface will rationally directly affect the flowing of gas in the jar, and then influence the atomization of fuel oil
With the generation of gaseous mixture.Due to there is small rut structure in traditional piston-top surface so that oil droplet is assembled in piston face, is unfavorable for
Air-fuel mixture, produces unnecessary oil consumption.
The content of the invention
The purpose of the present invention is that is used for directly jetting gasoline engine channel-style for above-mentioned the deficiencies in the prior art there is provided one kind
The piston of combustion chamber, reduction oil consumption, oil dilution and discharge can be realized simultaneously.
The purpose of the present invention is achieved through the following technical solutions, as follows in conjunction with illustrating：
A kind of piston for directly jetting gasoline engine channel-style combustion chamber, it is characterised in that：The top of piston is by top land
Outside plane 1, top land concave surface 3, top land projection 4 and the knuckle outer composition between them, top land
Footpath D1 is 70mm~90mm；
The top land projection 4 is located at inlet valve pit baseplane 2, exhaust valve pit baseplane 5 and piston top plane 1
Between the triangle of formation, height of projection H1 is 0.5mm~5mm, and middle pit depth H 2 is -2mm~5mm, pit section A-A
Bottom width L1 is 15mm~70mm, and circular arc R 1 is 5mm~85mm, and pit section B-B bottom width L2 is 0mm~20mm, circle
Arc R2, R3 are 5mm~150mm, and fillet R7, R8 of projection 4 are 2mm~10mm.
The top land projection 4 is flat-top or arched top.
Preferably, the height of projection H1 is 0.5mm.
Preferably, the middle pit depth H 2 is 2mm.
Compared with prior art, the beneficial effects of the present invention are：
The piston of the present invention, its top structure shape is reasonable in design；Piston top plane 1 and the squish face phase of cylinder cap baseplane
Coordinate, the air-flow of near is more concentrated on combustion chamber center, projection 4 and the combustion chamber cambered surface are engaged,
Also it can play a part of making the air-flow of near be more concentrated on combustion chamber center；Passage energy on air-flow sprue
Gas in the jar is reduced as far as possible and moves the aggregation of loss of energy and oil droplet in piston face, reaches the mesh for reducing HC and SOOT discharges
's；Meanwhile, high gas kinetic energy can effectively facilitate air-fuel mixture, form suitable mixture strength distribution.
Brief description of the drawings
Structural representations of the Fig. 1 for the present invention for the piston of directly jetting gasoline engine channel-style combustion chamber；
Top views of the Fig. 2 for the present invention for the piston of directly jetting gasoline engine channel-style combustion chamber；
Fig. 3 for Fig. 2 A-A to sectional view；
Fig. 4 is Fig. 2 B-B direction sectional view；
Fig. 5 is piston of the invention and cylinder cap assembly cooperation schematic diagram.
In figure：1. the top land of 2. inlet valve pit baseplane of top land plane, 3. top land concave surface 4. is raised
5. the exhaust valve 16. of exhaust valve pit baseplane 11. fuel injector, 12. air intake duct, 13. inlet valve, 14. spark plug 15. is vented
The cylinder cap of road 17. piston, 18. combustion chamber 19..
Embodiment
In order to further illustrate technical scheme, with reference to Figure of description, embodiment of the invention is such as
Under：
As shown in figure 5, fuel injector 11, air intake duct 12, inlet valve 13, spark plug 14, exhaust valve 15 and exhaust duct 16 are equal
Relevant position on cylinder cap 19 constitutes cylinder cap assembly.The cylinder cap assembly is formed with the top of piston 17 disclosed by the invention
Combustion chamber 18, for directly jetting gasoline engine.
As shown in figures 1-4, a kind of piston for directly jetting gasoline engine channel-style combustion chamber disclosed by the invention, its top
It is made up of top land plane 1, top land concave surface 3, top land projection 4 and the knuckle outer between them.It is living
Outer diameter D 1 at the top of plug is 70mm~90mm, and top land projection 4 is located at inlet valve pit baseplane 2, exhaust valve pit bottom and put down
Can be flat-top or arched top between the triangle of face 5 and the formation of piston top plane 1, height of projection H1 is 0.5mm~5mm.In
Between pit depth H2 be -2mm~5mm (negative value be pit bottom surface be higher than piston top plane), pit section A-A bottom width L1 is
15mm~70mm, circular arc R 1 is 5mm~85mm, and pit section B-B bottom width L2 is 0mm~20mm, and circular arc R 2, R3 are 5mm
~150mm.Fillet R7, R8 of projection 4 are 2mm~10mm.
Preferably, the height of projection H1 is 0.5mm.
Preferably, the middle pit depth H 2 is 2mm.
In above-mentioned technical proposal, its top structure shape is reasonable in design.Top land plane 1 and the squish of cylinder cap baseplane
Face is engaged, and the air-flow of near is more concentrated on combustion chamber center, top land projection 4 and the combustion chamber
Cambered surface is engaged, and can also play a part of making the air-flow of near to be more concentrated on combustion chamber center.Air-flow main flow
Passage on road can make gas in the jar kinetic energy few loss and oil droplet as far as possible in the aggregation of piston face, reach reduction HC and
The purpose of SOOT discharges；Meanwhile, high gas kinetic energy can effectively facilitate air-fuel mixture, form suitable mixture strength distribution.
Above-mentioned technical proposal of the present invention calculates checking by engine In-Cylinder Flow, in the bar BMEP of 1500 r/min 21
Under working condition, near gas in the jar tubulence energy improves 4%~8% than conventional design, and effect is notable.
Claims (4)
1. a kind of piston for directly jetting gasoline engine channel-style combustion chamber, it is characterised in that：Put down by top land at the top of piston
Face (1), top land concave surface (3), top land raised (4) and the knuckle outer composition between them, top land
Outer diameter D 1 be 70mm~90mm；
It is flat that the top land raised (4) is located at inlet valve pit baseplane (2), exhaust valve pit baseplane (5) and piston top
Between the triangle that face (1) is formed, height of projection H1 is 0.5mm~5mm, and middle pit depth H 2 is -2mm~5mm, and pit is cut
Face A-A bottom widths L1 be 15mm~70mm, circular arc R 1 be 5mm~85mm, pit section B-B bottom width L2 be 0mm~
20mm, circular arc R 2, R3 are 5mm~150mm, and fillet R7, the R8 of raised (4) are 2mm~10mm.
2. a kind of piston for directly jetting gasoline engine channel-style combustion chamber according to claim 1, it is characterised in that：It is described
Top land projection (4) is flat-top or arched top.
3. a kind of piston for directly jetting gasoline engine channel-style combustion chamber according to claim 1, it is characterised in that：It is described
Height of projection H1 is 0.5mm.
4. a kind of piston for directly jetting gasoline engine channel-style combustion chamber according to claim 1, it is characterised in that：It is described
Middle pit depth H 2 is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710152257.2A CN107100756A (en) | 2017-03-15 | 2017-03-15 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710152257.2A CN107100756A (en) | 2017-03-15 | 2017-03-15 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107100756A true CN107100756A (en) | 2017-08-29 |
Family
ID=59675592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710152257.2A Pending CN107100756A (en) | 2017-03-15 | 2017-03-15 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107100756A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538369A (en) * | 2019-01-15 | 2019-03-29 | 李斯特技术中心（上海）有限公司 | A kind of piston and its top shape |
| CN114991985A (en) * | 2022-06-01 | 2022-09-02 | 一汽解放汽车有限公司 | Piston and engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250714Y (en) * | 2008-09-05 | 2009-06-03 | 重庆长安汽车股份有限公司 | Engine plunger top combustion chamber |
| CN206860304U (en) * | 2017-03-15 | 2018-01-09 | 中国第一汽车股份有限公司 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
-
2017
- 2017-03-15 CN CN201710152257.2A patent/CN107100756A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250714Y (en) * | 2008-09-05 | 2009-06-03 | 重庆长安汽车股份有限公司 | Engine plunger top combustion chamber |
| CN206860304U (en) * | 2017-03-15 | 2018-01-09 | 中国第一汽车股份有限公司 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538369A (en) * | 2019-01-15 | 2019-03-29 | 李斯特技术中心（上海）有限公司 | A kind of piston and its top shape |
| CN114991985A (en) * | 2022-06-01 | 2022-09-02 | 一汽解放汽车有限公司 | Piston and 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: 20170829 |