CN201165914Y - Offset internal combustion engine flow squeezing piston - Google Patents
Offset internal combustion engine flow squeezing piston Download PDFInfo
- Publication number
- CN201165914Y CN201165914Y CNU2008200432838U CN200820043283U CN201165914Y CN 201165914 Y CN201165914 Y CN 201165914Y CN U2008200432838 U CNU2008200432838 U CN U2008200432838U CN 200820043283 U CN200820043283 U CN 200820043283U CN 201165914 Y CN201165914 Y CN 201165914Y
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- CN
- China
- Prior art keywords
- piston
- combustion engine
- squish
- offset
- collision prevention
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- Expired - Fee Related
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 36
- 230000002265 prevention Effects 0.000 claims description 30
- 238000010304 firing Methods 0.000 description 8
- 238000007599 discharging Methods 0.000 description 3
- 241001270131 Agaricus moelleri Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
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- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
An offset internal-combustion engine squish piston belongs to the technical field of pistons, which provides an offset internal-combustion engine squish piston adapted to a semi-sphere combustion chamber formed by an offset valve tangent duct of a push-rod type internal-combustion engine. The technical scheme of the utility model includes that the offset internal-combustion engine squish piston is composed of a piston head portion, a piston ring groove, a piston skirt portion, a piston pin hole, a collision protecting concave pit of an intake valve, a collision protecting concave pit of an exhaust valve, a squish surface 1, a squish surface 2 and a concave ellipsoid, wherein the piston head portion is arranged at the upper end of the piston, the piston ring groove is arranged on the outer surface of the upper section of the piston, the piston skirt portion is arranged at the lower section of the piston, the piston pin hole is arranged in the middle section of the piston, the collision protecting concave pits of the intake valve and the exhaust valve are arranged at the top end of the piston head portion and disposed on two sides of the piston pin hole, the squish surface 1 and the squish surface 2 are arranged at the top end of the piston head portion and disposed on two sides of the protecting collision concave pits of the intake valve and the exhaust valve, and the concave ellipsoid is arranged in the central portion of the piston head portion. The offset internal-combustion engine squish piston has the advantages of being applied in internal combustion engines, which forms the intake swirl by matching with the offset valve tangent duct of the push-rod type internal-combustion engine to achieve sufficient combustion and reduce emission.
Description
Technical field
Belong to the internal combustion engine technical field.Relate in particular to a kind of offset squish piston that adapts to the hemispherical combustion chamber of motorcycle post rod type I. C. engine offset valve tangential air flue formation.
Background technique
The firing chamber of internal-combustion engine is surrounded by corresponding matrix space on piston head and the cylinder head, and the design of the shape of its firing chamber, layout and piston head etc. have very big influence to the combustion process of motor, and directly influence the performance of motor.
The shape of prior art piston head has flat-top, protruding top, the branch of concave crown etc., the piston head of early stage two stroke engine adopts the convex head piston of convex spherical more, to adapt to the needs of scavenging process, but the area of contact of convex head piston and firing chamber is bigger, thereby caloric receptivity is many, cause the thermal expansion amount of piston big, the piston head of four stroke engine is used flat-top more, and its technology is simple, heat absorption area is little, but four stroke engine reduces combustion chamber volume in order to adapt to the requirement of firing chamber, also uses protruding top or concave head piston.
The post rod type internal-combustion engine of the medium and small discharge capacity of motorcycle in the market, generally adopt the hemispherical combustion chamber, the sphere convex head piston of almost plane, spark plug is arranged in firing chamber central authorities, the rate of burning height, has good inflation performance, it is the most basic firing chamber of the used high-speed gasoline engine of motorcycle, this firing chamber HC discharging is low, but because the maximum combustion temperature height, the NOx discharging is higher, at present, for reaching the Abgasgesetz index, the requirement that is conceived to improve Economy simultaneously, the suitably crowded stream and the intake swirl of intensity, can improve rate of flame propagation, increase the cooling of terminal mixed gas, reduce Combustion Cycle Variability, enlarge the mixed gas boundary of catching fire, organize the more weak mixture that burns, finish after burning rapidly, therefore, improve the post rod type petrol engine of the medium and small discharge capacity of motorcycle of firing chamber, the tissue that it is realized intake swirl and squeezes stream, can realize by the design of offset valve tangential intake duct and the design of offset squish piston, guarantee that simultaneously compression ratio is constant.
Summary of the invention
Technical problem to be solved provides a kind of offset convex-concave top internal-combustion engine squish piston that adapts to the hemispherical combustion chamber of post rod type I. C. engine offset valve tangential air flue formation.
The technological scheme that solves its technical problem is as follows: offset internal-combustion engine squish piston, comprise piston crown, piston ring groove, the piston skirt, piston pin hole, intake valve collision prevention pit and exhaust valve collision prevention pit, it is characterized in that: also comprise and squeeze stream interface 1, squeeze stream interface 2 and spill ellipsoid, piston crown is located at the upper end of piston, piston ring groove is located at the outer surface of the epimere of piston, the piston skirt is located at the hypomere of piston, piston pin hole is located at the stage casing of piston, intake valve collision prevention pit and exhaust valve collision prevention pit are located at the top of piston crown, and place the left and right sides of piston pin hole respectively, squeeze the top that stream interface 1 and crowded stream interface 2 are located at piston crown, and place the left and right sides of intake valve collision prevention pit and exhaust valve collision prevention pit respectively, the spill ellipsoid is located at the intermediate portion on piston crown top, intake valve collision prevention pit, exhaust valve collision prevention pit, squeeze stream interface 1, squeeze the outer surface that stream interface 2 and spill ellipsoid all are located at the piston crown top.
Described offset internal-combustion engine squish piston is characterized in that: the central plane of intake valve collision prevention pit wherein and exhaust valve collision prevention pit is offset to the left and right sides of piston central plane respectively.
Described offset internal-combustion engine squish piston is characterized in that: the area of crowded stream interface 1 wherein is greater than the area that squeezes stream interface 2.
Beneficial effect: be applied to internal-combustion engine.Its beneficial effect is that the intake swirl that cooperates the post rod type I. C. engine offset valve tangential air flue to form can make burning rapidly, makes the combustion process of internal-combustion engine more abundant, and has reduced discharging, helps antiknock quality, has improved the performance of internal-combustion engine.
Description of drawings
Fig. 1 is the mansion view of offset internal-combustion engine squish piston.
Fig. 2 is the A-A sectional view of offset internal-combustion engine squish piston.
Fig. 3 is the B-B sectional view of offset internal-combustion engine squish piston.
1 is piston crown among the figure, and 2 is piston ring groove, and 3 is the piston skirt, and 4 is piston pin hole, and 5 is intake valve collision prevention pit, and 6 is exhaust valve collision prevention pit, and 7 is that crowded stream interface 1,8 is the spill ellipsoid for squeezing stream interface 2,9.
Embodiment
An embodiment is in conjunction with Fig. 1, Fig. 2 and Fig. 3 are described below: have size to squeeze the offset internal-combustion engine squish piston of stream interface and spill ellipsoid, comprise piston crown, piston ring groove, the piston skirt, piston pin hole, intake valve collision prevention pit, exhaust valve collision prevention pit squeezes stream interface 1, squeeze stream interface 2 and spill ellipsoid, piston crown is located at the upper end of piston, piston ring groove is located at the outer surface of the epimere of piston, the piston skirt is located at the hypomere of piston, piston pin hole is located at the stage casing of piston, intake valve collision prevention pit and exhaust valve collision prevention pit are located at the top of piston crown, and place the left and right sides of piston pin hole respectively, squeeze the top that stream interface 1 and crowded stream interface 2 are located at piston crown, and place the left and right sides of intake valve collision prevention pit and exhaust valve collision prevention pit respectively, the spill ellipsoid is located at the intermediate portion on piston crown top, intake valve collision prevention pit, exhaust valve collision prevention pit, squeeze stream interface 1, squeeze the outer surface that stream interface 2 and spill ellipsoid all are located at the piston crown top.
Claims (3)
1. offset internal-combustion engine squish piston, comprise piston crown (1), piston ring groove (2), piston skirt (3), piston pin hole (4), intake valve collision prevention pit (5) and exhaust valve collision prevention pit (6), it is characterized in that: also comprise and squeeze stream interface 1 (7), squeeze stream interface 2 (8) and spill ellipsoid (9), piston crown (1) is located at the upper end of piston, piston ring groove (2) is located at the outer surface of the epimere of piston, piston skirt (3) is located at the hypomere of piston, piston pin hole (4) is located at the stage casing of piston, intake valve collision prevention pit (5) and exhaust valve collision prevention pit (6) are located at the top of piston crown (1), and place the left and right sides of piston pin hole (4) respectively, squeeze the top that stream interface 1 (7) and crowded stream interface 2 (8) are located at piston crown (1), and place the left and right sides of intake valve collision prevention pit (5) and exhaust valve collision prevention pit (6) respectively, spill ellipsoid (9) is located at the intermediate portion on piston crown (1) top, intake valve collision prevention pit (5), exhaust valve collision prevention pit (6), squeeze stream interface 1 (7), squeeze the outer surface that stream interface 2 (8) and spill ellipsoid (9) all are located at piston crown (1) top.
2, according to the described offset internal-combustion engine of claim 1 squish piston, it is characterized in that: the intake valve collision prevention pit (5) wherein and the central plane of exhaust valve collision prevention pit (6) are offset to the left and right sides of piston central plane respectively.
3, according to the described offset internal-combustion engine of claim 1 squish piston, it is characterized in that: the area of crowded stream interface 1 (7) wherein is greater than the area that squeezes stream interface 2 (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200432838U CN201165914Y (en) | 2008-01-25 | 2008-01-25 | Offset internal combustion engine flow squeezing piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200432838U CN201165914Y (en) | 2008-01-25 | 2008-01-25 | Offset internal combustion engine flow squeezing piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201165914Y true CN201165914Y (en) | 2008-12-17 |
Family
ID=40191300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200432838U Expired - Fee Related CN201165914Y (en) | 2008-01-25 | 2008-01-25 | Offset internal combustion engine flow squeezing piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201165914Y (en) |
-
2008
- 2008-01-25 CN CNU2008200432838U patent/CN201165914Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20130125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |