CN206860304U - 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
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- CN206860304U CN206860304U CN201720248870.XU CN201720248870U CN206860304U CN 206860304 U CN206860304 U CN 206860304U CN 201720248870 U CN201720248870 U CN 201720248870U CN 206860304 U CN206860304 U CN 206860304U
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- gasoline engine
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Abstract
It the utility model is related 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, piston of the present utility model, its top structure shape are 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, suitable mixture strength distribution is formed.
Description
Technical field
The utility model belongs to combustion system of engine technical field, and in particular to one kind is used for directly jetting gasoline engine channel-style
The piston of combustion chamber.
Background technology
At present, the car ownership in 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, reduce
Discharge and core of the oil consumption as engine development, are attached most importance to 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 to be 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, produce unnecessary oil consumption.
The content of the invention
The purpose of this utility model is that for above-mentioned the deficiencies in the prior art, there is provided one kind is led to for directly jetting gasoline engine
The piston of channel type combustion chamber, can realize simultaneously reduces oil consumption, oil dilution and discharge.
The purpose of this utility model 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
Plane 1, top land concave surface 3, top land projection 4 and the knuckle outer between them form, outside 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 utility model are：
Piston of the present utility model, its top structure shape are reasonable in design；Piston top 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, projection 4 and the combustion chamber cambered surface match
Close, can also play a part of making the air-flow of near be more concentrated on combustion chamber center；It is logical on air-flow sprue
Road 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 and reduce HC and SOOT discharges
Purpose；Meanwhile high gas kinetic energy can effectively facilitate air-fuel mixture, suitable mixture strength distribution is formed.
Brief description of the drawings
Fig. 1 is the structural representation for the piston that the utility model is used for directly jetting gasoline engine channel-style combustion chamber；
Fig. 2 is the top view for the piston that the utility model is used for directly jetting gasoline engine channel-style combustion chamber；
Fig. 3 is Fig. 2 A-A to sectional view；
Fig. 4 is Fig. 2 B-B direction sectional view；
Fig. 5 is piston of the present utility model 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 duct of exhaust valve pit baseplane 11. fuel injector, 12. air intake duct, 13. inlet valve, 14. spark plug, 15. exhaust valve 16.
17. the cylinder cap of 18. combustion chamber of piston 19..
Embodiment
It is of the present utility model specific real with reference to Figure of description in order to further illustrate the technical solution of the utility model
It is as follows to apply mode：
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 forms cylinder cap assembly.The cylinder cap assembly and the top of piston 17 disclosed in the utility model
Combustion chamber 18 is formed, 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 in the utility model, its
Top is by top land plane 1, top land concave surface 3, top land projection 4 and the knuckle outer group between them
Into.The outer diameter D 1 of top land is 70mm~90mm, and top land projection 4 is positioned at inlet valve pit baseplane 2, exhaust valve pit
Can be flat-top or arched top between the triangle that baseplane 5 and piston top plane 1 are formed, height of projection H1 be 0.5mm~
5mm.Middle pit depth H 2 is -2mm~5mm (negative value is that pit bottom surface is higher than piston top plane), and pit section A-A bottom surface is wide
Degree L1 is 15mm~70mm, and circular arc R 1 is 5mm~85mm, and pit section B-B bottom width L2 is 0mm~20mm, circular arc R 2, R3
For 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 the aggregation of the loss as few as possible of gas in the jar kinetic energy and oil droplet in piston face, reach reduce HC and
The purpose of SOOT discharges；Meanwhile high gas kinetic energy can effectively facilitate air-fuel mixture, suitable mixture strength distribution is formed.
The utility model above-mentioned technical proposal calculates checking by engine In-Cylinder Flow, in 1500r/min 21bar
Under BMEP working conditions, near gas in the jar tubulence energy improves 4%~8% than conventional design, significant effect.
Claims (4)
- A kind of 1. 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；The top land raised (4), which is located at inlet valve pit baseplane (2), exhaust valve pit baseplane (5) and piston top, puts down 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 is 15mm~70mm, and circular arc R 1 is 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.
- A kind of 2. 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.
- A kind of 3. 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.
- A kind of 4. 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 |
|---|---|---|---|
| CN201720248870.XU CN206860304U (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 |
|---|---|---|---|
| CN201720248870.XU CN206860304U (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 |
|---|---|
| CN206860304U true CN206860304U (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720248870.XU Active CN206860304U (en) | 2017-03-15 | 2017-03-15 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100756A (en) * | 2017-03-15 | 2017-08-29 | 中国第汽车股份有限公司 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
-
2017
- 2017-03-15 CN CN201720248870.XU patent/CN206860304U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100756A (en) * | 2017-03-15 | 2017-08-29 | 中国第汽车股份有限公司 | A kind of piston for directly jetting gasoline engine channel-style combustion chamber |
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