CN210033650U - Piston for diesel engine and diesel engine with same - Google Patents
Piston for diesel engine and diesel engine with same Download PDFInfo
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- CN210033650U CN210033650U CN201922338102.5U CN201922338102U CN210033650U CN 210033650 U CN210033650 U CN 210033650U CN 201922338102 U CN201922338102 U CN 201922338102U CN 210033650 U CN210033650 U CN 210033650U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model belongs to the technical field of the engine, concretely relates to provides a piston for diesel engine installs in diesel engine's cylinder, and the top of piston is equipped with the combustion chamber, and the combustion chamber includes omega shape rotating chamber, is equipped with the larynx between the top surface of omega shape rotating chamber and piston, and the top surface of piston is equipped with a plurality of trapezoidal recesses along the circumference direction of larynx, and the one end of the axis of piston is kept away from to trapezoidal recess is located to trapezoidal recess's upper base, and the lower bottom side and the larynx intercommunication of trapezoidal recess. When the engine runs, part of fuel oil moves towards the top of the piston along the throat of the omega-shaped combustion chamber, the trapezoidal grooves can play a good guiding role for oil bundles, guide the oil bundles to move towards the space above the top of the piston and promote the mixing of the oil bundles and air above the piston, and on the other hand, the trapezoidal grooves guide the atomization and diffusion of the oil bundles, so that the situation that the fuel oil moves to a cylinder sleeve along the top of the piston to cause the fuel oil to collide the wall is avoided.
Description
Technical Field
The utility model belongs to the technical field of the engine, concretely relates to a piston for diesel engine. The utility model discloses still relate to a diesel engine.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
Compared with the existing stepped combustion chamber, the internal airflow of the necking omega combustion chamber moves violently, and oil-gas mixing inside the pit is facilitated. However, the necking omega combustion chamber cannot well utilize the space fresh air at the top of the combustion chamber, and once the fuel is sprayed at the throat position of the combustion chamber, the fuel is easy to move to a cylinder liner along the top of a piston to cause the fuel to collide with the wall.
Disclosure of Invention
The utility model aims at solving the problem that diesel engine easily takes place the fuel and bumps the wall and weaken combustion performance among the prior art at least, this purpose is realized through following technical scheme:
the utility model discloses a first aspect provides a piston for diesel engine installs in diesel engine's cylinder, the top of piston is equipped with the combustion chamber, the combustion chamber includes omega shape rotatory chamber, omega shape rotatory chamber with be equipped with the larynx between the top surface of piston, the top surface of piston is followed the circumference direction of larynx is equipped with a plurality of trapezoidal recesses, locate the upper base of trapezoidal recess is kept away from the one end of the axis of piston, the lower bottom side of trapezoidal recess with the larynx intercommunication.
The utility model provides a top for diesel engine's piston is equipped with omega shape combustion chamber, sets up a plurality of trapezoidal recesses in the peripheral circumference of the larynx mouth of omega shape combustion chamber. When the engine runs, part of fuel oil moves towards the top of the piston along the throat of the omega-shaped combustion chamber, the trapezoidal grooves can play a good guiding role for oil bundles, guide the oil bundles to move towards the space above the top of the piston and promote the mixing of the oil bundles and air above the piston, and on the other hand, the trapezoidal grooves guide the atomization and diffusion of the oil bundles, so that the situation that the fuel oil moves to a cylinder sleeve along the top of the piston to cause the fuel oil to collide the wall is avoided.
In addition, according to the utility model discloses a piston for diesel engine still can have following additional technical characterstic:
in some embodiments of the present invention, the diameter of the throat is 48mm to 56mm, the height of the throat is 4mm to 6mm, and the transition surface between the throat and the omega-shaped rotating cavity is an arc surface.
In some embodiments of the invention, the ratio of the diameter of the throat to the maximum diameter of the omega-shaped rotating cavity is 88% to 92%.
In some embodiments of the present invention, the ω -shaped rotation cavity is provided with an inner concave portion along a circumferential direction of the ω -shaped rotation cavity, a concave arc radius of the inner concave portion is 5mm to 8mm, and a maximum diameter of the ω -shaped rotation cavity is 58% to 62% of a cylinder diameter of the cylinder.
In some embodiments of the present invention, a vertical distance between a bottom of the omega-shaped rotary cavity and a top surface of the piston is 14mm to 17mm, and a ratio of the vertical distance to a maximum diameter of the omega-shaped rotary cavity is 25% to 30%.
In some embodiments of the utility model, the bottom surface center in omega shape rotatory chamber is equipped with conical central boss, the concave surface circular arc with transition face between the conical surface of center boss is the arc surface, the contained angle of the generating line of conical surface is 120 to 140, two of center boss the generating line of conical surface adopts circular arc rounding off, the top surface distance of center boss the distance of the top surface of piston is 5mm to 8 mm.
In some embodiments of the present invention, the trapezoidal groove is used for guiding the oil jet bundle of the oil injector, the number of the trapezoidal groove is related to the number of the oil jet bundle, and the position of the trapezoidal groove distributed along the circumferential direction of the throat corresponds to the injection position of the oil jet bundle.
In some embodiments of the present invention, the depth of the trapezoidal groove is 2mm to 3mm, the upper bottom width of the trapezoidal groove is 8mm to 10mm, the waist length of the trapezoidal groove is 6mm to 8mm, and the lower bottom arc length of the trapezoidal groove is 10mm to 12 mm.
In some embodiments of the present invention, the sum of the lengths of the lower bottom arcs of the plurality of trapezoidal grooves is less than two thirds of the circumference of the throat.
A second aspect of the present invention provides a diesel engine, comprising:
the cylinder body is provided with a plurality of cylinders;
a plurality of pistons, a plurality of pistons do the utility model discloses a piston for diesel engine that the first aspect provided, a plurality of piston assemblies are in the cylinder body in a plurality of cylinders.
The utility model provides a gas engine has the omega shape combustion chamber that is equipped with throat circumference direction and sets up a plurality of trapezoidal recesses, can guide the oil beam, forms stronger crowded stream, avoids the oil beam to bump the wall.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a cross-sectional schematic view of the top of a piston for a diesel engine according to an embodiment of the invention;
figure 2 schematically shows a top view of a piston for a diesel engine according to an embodiment of the invention;
the reference symbols in the drawings denote the following:
10: piston, 11: an omega-shaped rotating cavity; 12: throat, 13: trapezoidal groove, 14: inner concave portion, 15: a central boss;
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "second" and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1-2, the utility model discloses a first aspect provides a piston 10 for diesel engine installs in diesel engine's cylinder, and piston 10's top is equipped with the combustion chamber, and the combustion chamber includes omega shape rotating chamber 11, is equipped with throat 12 between omega shape rotating chamber 11 and the top surface of piston 10, and the top surface of piston 10 is equipped with a plurality of trapezoidal recesses 13 along the circumferential direction of throat 12, and the one end of the axis of piston 10 is kept away from to trapezoidal recess 13 is located to trapezoidal recess 13's upper base, and the lower bottom side and the throat 12 intercommunication of trapezoidal recess 13.
The utility model provides a peripheral circumference that is used for diesel engine's piston 10 top is equipped with omega shape combustion chamber, at throat 12 of omega shape combustion chamber sets up a plurality of trapezoidal recesses 13. When the engine runs, part of fuel oil moves towards the top of the piston 10 along the throat 12 of the omega-shaped combustion chamber under the influence of airflow in the omega-shaped combustion chamber, the narrow-outside and wide-inside structure of the trapezoid groove 13 can play a good role in guiding oil bundles to move towards the space above the top of the piston, so that the mixing of the oil bundles and air above the oil bundles is promoted, on the other hand, when the oil bundles are sprayed to the trapezoid groove 13 by the oil sprayer, the trapezoid groove 13 guides the oil bundles to be atomized and diffused, and the phenomenon that the oil bundles sprayed by the oil sprayer move to a cylinder sleeve along the top of the piston 10 to cause the fuel oil to collide with the wall is avoided.
In some embodiments of the present invention, the diameter of the throat 12 is 48mm to 56mm, the height of the throat 12 is 4mm to 6mm, and the transition surface between the throat 12 and the ω -shaped rotating cavity 11 is a circular arc surface. The strength of the airflow movement in the combustion chamber is increased by optimizing the size of the throat 12.
In some embodiments of the present invention, the ratio of the diameter of the throat 12 to the maximum diameter of the omega-shaped rotating chamber 11 is 88% to 92%. The strength of the airflow movement in the combustion chamber is improved by optimizing the size of the throat 12 and the omega-shaped rotary cavity 11.
In some embodiments of the present invention, the ω -shaped rotating cavity 11 is provided with an inner concave portion 14 along the circumference of the ω -shaped rotating cavity 11, the concave arc radius R of the inner concave portion 14 is 5mm to 8mm, and the maximum diameter D of the ω -shaped rotating cavity 11 is 58% to 62% of the cylinder diameter of the cylinder. The intensity of the airflow movement in the combustion chamber is improved by optimizing the radius R of the arc of the concave surface and the maximum diameter D of the omega-shaped rotating cavity 11.
In some embodiments of the present invention, the vertical distance H between the bottom of the omega-shaped rotary cavity 11 and the top surface of the piston 10 is 14mm to 17mm, and the ratio of the vertical distance H to the maximum diameter D of the omega-shaped rotary cavity 11 is 25% to 30%. The intensity of the airflow movement in the combustion chamber is improved by optimizing the vertical distance H.
In some embodiments of the utility model, the bottom surface center of omega-shaped rotating cavity 11 is equipped with conical central boss 15, the adoption circular arc R1 transition between the conical surface of concave surface circular arc R and central boss 15, the contained angle α of the generating line of conical surface is 120 to 140, the generating line of the two conical surfaces of central boss 15 adopts circular arc rounding off, the distance h1 of the top surface of central boss 15 apart from the top surface of piston 10 is 5mm to 8 mm.
In some embodiments of the present invention, the trapezoid groove 13 is used for guiding the fuel injection bundle of the fuel injector, the number of the trapezoid grooves 13 is related to the number of the fuel injection bundles, and the positions of the trapezoid grooves 13 distributed along the circumferential direction of the throat 12 correspond to the injection positions of the fuel injection bundles. By arranging the trapezoid grooves 13 correspondingly in the oil injection direction of the oil injector, the oil injection of the oil injector can be atomized and diffused by being guided by the trapezoid grooves 13, and the oil bundles are prevented from colliding with the wall.
In some embodiments of the present invention, the depth of the trapezoidal groove 13 is 2mm to 3mm, the upper bottom width of the trapezoidal groove 13 is 8mm to 10mm, the waist length of the trapezoidal groove 13 is 6mm to 8mm, and the lower bottom arc length of the trapezoidal groove 13 is 10mm to 12 mm. A better guiding action is achieved by optimising the dimensions of the trapezoidal recess 13.
In some embodiments of the present invention, the sum of the lengths L3 of the lower bottom arcs of the plurality of trapezoidal grooves 13 is less than two thirds of the circumference of the throat 12. Compared with the mode of processing grooves in 360 degrees on the periphery of the throat 12, the extrusion flow movement is stronger.
The second aspect of the utility model provides a diesel engine, diesel engine includes:
the cylinder body is provided with a plurality of cylinders;
a plurality of pistons 10, a plurality of pistons 10 are the utility model discloses a piston for diesel engine that first aspect provided, a plurality of pistons 10 assemble in a plurality of cylinders of cylinder body.
The utility model provides a gas engine has and is equipped with 12 circumference directions of throat and sets up the omega shape combustion chamber of a plurality of trapezoidal recesses 13, can guide the oil beam, forms stronger crowded stream, avoids the oil beam to bump the wall.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A piston for a diesel engine is installed in a cylinder of the diesel engine and is characterized in that a combustion chamber is arranged at the top of the piston and comprises an omega-shaped rotating cavity, a throat is arranged between the omega-shaped rotating cavity and the top surface of the piston, a plurality of trapezoidal grooves are formed in the top surface of the piston along the circumferential direction of the throat, the upper bottoms of the trapezoidal grooves are arranged at one ends, far away from the axis of the piston, of the trapezoidal grooves, and the lower bottom sides of the trapezoidal grooves are communicated with the throat.
2. The piston for a diesel engine as set forth in claim 1, wherein the throat has a diameter of 48mm to 56mm, the throat has a height of 4mm to 6mm, and a transition surface between the throat and the ω -shaped rotation chamber is a circular arc surface.
3. The piston for a diesel engine as set forth in claim 2, wherein the ratio of the diameter of said throat to the maximum diameter of said ω -shaped rotation chamber is 88% to 92%.
4. The piston for a diesel engine according to claim 1, characterized in that the ω -shaped rotation chamber is provided with an inner recess along a circumferential direction of the ω -shaped rotation chamber, a concave circular arc radius of the inner recess is 5mm to 8mm, and a maximum diameter of the ω -shaped rotation chamber is 58% to 62% of a cylinder diameter of the cylinder.
5. The piston for a diesel engine of claim 4, characterized in that the perpendicular distance of the bottom of the omega-shaped rotary cavity to the top surface of the piston is 14mm to 17mm, and the ratio of the perpendicular distance to the maximum diameter of the omega-shaped rotary cavity is 25% to 30%.
6. The piston for the diesel engine according to claim 4, wherein a tapered central boss is provided at the center of the bottom surface of the ω -shaped rotating cavity, a transition surface between the arc of the concave surface and the conical surface of the central boss is an arc surface, an included angle between generatrices of the conical surface is 120 ° to 140 °, the generatrices of the two conical surfaces of the central boss are in arc smooth transition, and a distance from the top surface of the central boss to the top surface of the piston is 5mm to 8 mm.
7. The piston for a diesel engine according to any one of claims 1 to 6, characterized in that the trapezoidal grooves are used for guiding a fuel injection bundle of a fuel injector, the number of the trapezoidal grooves is correlated with the number of the fuel injection bundle, and the positions of the trapezoidal grooves distributed in the circumferential direction of the throat correspond to the injection positions of the fuel injection bundle.
8. The piston for a diesel engine according to any one of claims 1 to 6, wherein the depth of the trapezoidal groove is 2mm to 3mm, the width of the upper bottom of the trapezoidal groove is 8mm to 10mm, the length of the waist of the trapezoidal groove is 6mm to 8mm, and the arc length of the lower bottom of the trapezoidal groove is 10mm to 12 mm.
9. The piston for a diesel engine as set forth in any one of claims 1 to 6, wherein the sum of the lengths of the arcs of the lower bottoms of the plurality of trapezoidal grooves is less than two thirds of the circumference of the throat.
10. A diesel engine, characterized in that the diesel engine comprises:
the cylinder body is provided with a plurality of cylinders;
a plurality of pistons according to any one of claims 1 to 9 fitted in the plurality of cylinders of the cylinder block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922338102.5U CN210033650U (en) | 2019-12-24 | 2019-12-24 | Piston for diesel engine and diesel engine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922338102.5U CN210033650U (en) | 2019-12-24 | 2019-12-24 | Piston for diesel engine and diesel engine with same |
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| Publication Number | Publication Date |
|---|---|
| CN210033650U true CN210033650U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922338102.5U Active CN210033650U (en) | 2019-12-24 | 2019-12-24 | Piston for diesel engine and diesel engine with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324766A (en) * | 2022-09-02 | 2022-11-11 | 一汽解放汽车有限公司 | Diesel engine combustion system and vehicle |
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2019
- 2019-12-24 CN CN201922338102.5U patent/CN210033650U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324766A (en) * | 2022-09-02 | 2022-11-11 | 一汽解放汽车有限公司 | Diesel engine combustion system and vehicle |
| CN115324766B (en) * | 2022-09-02 | 2024-01-09 | 一汽解放汽车有限公司 | Diesel engine combustion system and vehicle |
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