CN114753920A - Combustion chamber and gas engine - Google Patents
Combustion chamber and gas engine Download PDFInfo
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- CN114753920A CN114753920A CN202210679893.1A CN202210679893A CN114753920A CN 114753920 A CN114753920 A CN 114753920A CN 202210679893 A CN202210679893 A CN 202210679893A CN 114753920 A CN114753920 A CN 114753920A
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- combustion chamber
- piston
- top surface
- pit
- piston top
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B2023/106—Tumble flow, i.e. the axis of rotation of the main charge flow motion is horizontal
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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 combustion chamber and a gas engine, wherein the combustion chamber is used for the gas engine reformed by a diesel engine, the combustion chamber is combined with a weak tumble cylinder cover structure for use, the combustion chamber comprises a combustion chamber pit positioned at the top of a piston and a piston top surface surrounding the circumference of the combustion chamber pit, the piston top surface comprises an air inlet side piston top surface and an air outlet side piston top surface, the air inlet side piston top surface is higher than the air outlet side piston top surface, the air inlet side piston top surface is connected with the air outlet side piston top surface through a top smooth transition surface, the surface of the combustion chamber pit is a part of an ellipsoidal curved surface, and the cross section of the combustion chamber pit along the axial direction of the piston is an ellipsoidal cross section. According to the invention, the combustion chamber pit is designed into the semi-ellipsoidal pit, so that the tumble flow can be strengthened in the air intake process, the top surface of the piston is designed into a non-equal-height structure on the air intake and exhaust sides, the tumble flow is further strengthened in the compression process, the turbulent kinetic energy distribution can be optimized, the flame propagation speed is accelerated, and the detonation risk is reduced.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a combustion chamber and a gas engine.
Background
At present, the design and development of natural gas engines are generally improved on the basis of diesel engines, and for diesel engines, vortex generated by a cyclone air passage is beneficial to mixing of oil bundles and air to a certain extent, so that high-efficiency combustion and low pollutant emission are realized. The gas engine is premixed combustion, fuel is mixed with air in the air intake process, and after a spark plug is ignited to generate a fire core, the ideal state is that high turbulent kinetic energy exists in a cylinder in the combustion process. The increase of the turbulent kinetic energy can accelerate the flame propagation speed, which is significant for improving the combustion process of the gas engine and reducing the cycle variation. If large-size flow such as vortex continues to exist in the gas engine, the flow velocity near the spark plug is low at the end of compression, the longitudinal flow velocity is also low, the vortex cannot be broken into small-size turbulence, the turbulent kinetic energy is low, and therefore, the large-size vortex motion is not favorable for premixed combustion of the gas engine and the cyclic variation is large. For a gas engine, the turbulent kinetic energy can be improved by properly improving the tumble strength of the mixed gas, so that the combustion characteristic of the gas is improved. The vortex refers to large-scale rotational flow movement of gas organized around the central axis of the cylinder; the tumble refers to large-scale rotational flow movement of airflow organized around an axis vertical to the central axis of the cylinder; in addition, turbulent flow is different from laminar flow, and refers to a small-scale rotational flow which is generated in many directions and is not fixed when the airflow speed is high.
Due to the middle air inlet mode and casting deviation of the diesel engine, the consistency of the swirl ratio is poor, and the consistency of each cylinder is poor. On the premise that a valve rod of a diesel engine cannot be inclined, a roof-type combustion chamber similar to a gasoline engine cannot be achieved, so that tumble strength is low, a straight piston is usually adopted by a gas engine to match with tumble, the combustion speed of the current gas engine is still low, the piston needs to be further optimized, the tumble degree is enhanced, the flame propagation speed is increased, and the heat efficiency of the engine is improved.
The existing gas engine piston is generally formed by improving a diesel engine piston, a combustion chamber 01 of the piston mostly adopts a straight-opening basin-shaped structure, as shown in figure 1, the flame development form can be influenced due to the large-scale eddy motion, and the circulation change is high, in addition, the top height of the piston is the same, the squeezing flow strength generated on two sides of an inlet valve and an exhaust valve is similar, the flame transverse propagation speed is high, but the longitudinal speed of the area near a spark plug 03 is low, the turbulent kinetic energy is low and unreasonable in distribution, and the flame propagation speed in the initial ignition stage is low. As shown in fig. 1, a dashed-line frame region indicated in the vicinity of the spark plug 03 is a flame propagation low-speed region 02. At the same time, the lower flame propagation speed on the exhaust valve side increases the tendency to knock. Wherein squish flow refers to longitudinal and transverse airflow movement created when a portion of the piston surface and the cylinder head are brought into proximity with each other; the detonation refers to that flame waves are not completely diffused after gas in a combustion chamber is ignited, unburned gas at a far distance is self-ignited due to high temperature or high pressure, and the flame waves collide with flame waves of normal combustion to generate great pressure, so that abnormal knocking sound is generated by an engine. The transverse direction as used herein means in the cylinder radial direction and the longitudinal direction means in the cylinder axial direction.
Therefore, how to optimize the gas engine combustor to improve the gas combustion process is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention is directed to a combustion chamber and a gas engine, and the present invention is advantageous to form tumble in a cylinder by optimizing a structure of the combustion chamber and combining with an existing weak tumble air passage, and can change distribution of turbulent kinetic energy, thereby improving flame propagation speed and thermal efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a combustion chamber for the gas engine who is reformed transform into by the diesel engine, the combustion chamber uses with weak tumble cylinder head structure combination, the combustion chamber is including the combustion chamber pit that is located the top of piston and encircle the piston top surface of the circumference of combustion chamber pit, the piston top surface includes air intake side piston top surface and exhaust side piston top surface, air intake side piston top surface is higher than exhaust side piston top surface, just air intake side piston top surface with meet through the smooth transition face in top between the exhaust side piston top surface, the surface of combustion chamber pit is partly of ellipsoid curved surface, the combustion chamber pit is following the axial cross section of piston is oval cross section.
Preferably, the bottom surface of the cylinder cover above the piston is provided with two air inlet throat openings, a plane passing through the axis of the piston and perpendicular to the central connecting line of the two air inlet throat openings is a piston symmetry plane, the intersection line of the combustion chamber and the piston symmetry plane comprises an air inlet side piston top surface molded line, a combustion chamber pit molded line and an exhaust side piston top surface molded line which are sequentially connected, and the air inlet side piston top surface molded line and the exhaust side piston top surface molded line are perpendicular to the axis of the piston.
Preferably, the major axis direction of the oval cross section is parallel to the direction of a central connecting line of the two air inlet throats, and the molded line of the combustion chamber pit is a circular arc line.
Preferably, the ellipse corresponding to the joint of the combustion chamber pit and the top surface of the air inlet side piston is an air inlet side pit ellipse, and the distance between the bottom of the combustion chamber pit and the top surface of the air inlet side piston is half of the length of the minor axis of the air inlet side pit ellipse.
Preferably, the length of the long axis of the air inlet side pit ellipse is 1.4-1.6 times of the radius of the piston, and the length of the short axis of the air inlet side pit ellipse is 1.2-1.4 times of the radius of the piston.
Preferably, the projection of the top smooth transition surface on the piston symmetry plane is a top smooth transition surface molded line, and the top smooth transition surface molded line is a circular arc line.
Preferably, the radius of the top smooth transition surface profile is 0.3-0.6 times of the radius of the piston.
Preferably, the projection of the junction of the intake side piston top surface and the top smooth transition surface on the piston symmetry plane is located on the axis of the piston.
Preferably, the height difference between the top surface of the air inlet side piston and the top surface of the air outlet side piston is 0.05-0.2 times of the radius of the piston.
Preferably, the upper edge of the combustion chamber pit is connected with the top surface of the piston through a fillet transition surface.
Preferably, the radius of the fillet transition surface is 0.05-0.1 times of the radius of the piston.
According to the invention, the combustion chamber pit is designed into a semi-ellipsoidal pit shape, and the cross section of the combustion chamber pit is an elliptical cross section, so that more airflow can enter the combustion chamber pit in the air intake process, and further the tumble flow in the main tumble direction is strengthened. The top surface of the piston is designed into an asymmetric structure with the air inlet side higher than the air outlet side, and the non-equal-height characteristic of the top surface of the piston can lead the flow squeezing strength generated at the air inlet side and the air outlet side to be different in the compression process, so that the air flow is guided to flow from one side of the air inlet valve to one side of the air outlet valve, and the tumble strength in a combustion chamber is further enhanced. Meanwhile, due to the non-equal-height design of the top surface of the piston, the compression clearance between the air inlet side and the air exhaust side is different, air flows flow from one side of the air inlet valve to one side of the air exhaust valve, the air flow speed near the spark plug is increased, the turbulent kinetic energy distribution near the spark plug at the moment of ignition is optimized, the flame propagation speed is increased, the combustion speed of the area near the air exhaust valve is increased, and the detonation risk can be effectively reduced. In addition, the piston top surface adopts the characteristic of large fillet transition between different height parts, so that the eddy strength loss caused by non-equal height of the top part can be reduced, the heat load of the transition part can be effectively reduced, the detonation risk is reduced, and the reliability of the piston is improved.
The invention also provides a gas engine comprising any one of the combustion chambers described above. The derivation process of the beneficial effect of the gas engine is substantially similar to the derivation process of the beneficial effect of the combustion chamber, and therefore, the description is omitted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a straight-mouth bowl-shaped combustion chamber in the prior art;
FIG. 2 is a schematic illustration of a piston and combustion chamber configuration according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a piston symmetry plane of a piston and combustion chamber in an embodiment of the invention;
FIG. 4 is a graph of the change in-cylinder tumble strength of a prior art combustion chamber and a calibration point of the combustion chamber of the present invention;
FIG. 5 is a plot of the in-cylinder swirl intensity of a calibrated point for a prior art combustor and a combustor of the present invention;
FIG. 6 is a plot of the heat release rate versus the calibrated point for a prior art combustor and a combustor of the present invention.
In FIG. 1:
01 is a combustion chamber; 02 is a flame propagation low-speed area; 03 is a spark plug;
in fig. 2 to 6:
1 is a combustion chamber pit; 2 is the piston radius; 3 is the major axis of the pit ellipse; 4 is the minor axis of the pit ellipse; 5 is the distance between the bottom of the combustion chamber pit and the top surface of the air inlet side piston; 6 is a top smooth transition profile line; 7 is the radius of the fillet transition surface; 8 is the height difference of the tops of the pistons at the two sides of the intake valve and the exhaust valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2 to 6, the present invention provides a combustion chamber for a gas engine reformed from a diesel engine, wherein the combustion chamber is used in combination with a weak tumble cylinder head structure, and the weak tumble cylinder head structure refers to a cylinder head described in the patent of the invention ("a weak tumble rapid combustion system and a gas engine", publication No. CN 111287860A). the cylinder head structure is formed by reforming a cylinder head of the diesel engine, and the top surface of the combustion chamber formed by the cylinder head structure is a flat-top structure, that is, a valve stem of the cylinder head is arranged along the axial direction of a piston 1, and an intake passage of the cylinder head is a weak tumble air passage.
The combustion chamber is including the piston top surface that is located the combustion chamber pit 1 at the top of piston and encircles the circumference of combustion chamber pit 1, the piston top surface is including admitting air side piston top surface and exhaust side piston top surface, it is higher than exhaust side piston top surface to admit air side piston top surface, and meet through the smooth transition face in top between admit air side piston top surface and the exhaust side piston top surface, the surface of combustion chamber pit 1 is partly of ellipsoid curved surface, combustion chamber pit 1 is oval cross section at the axial cross section along the piston.
According to the invention, the combustion chamber pit 1 is designed into a semi-ellipsoidal pit shape, and the cross section of the combustion chamber pit 1 is an elliptical cross section, so that more air flow can enter the combustion chamber pit 1 in the air intake process, and the tumble flow in the main tumble direction is strengthened. The top surface of the piston is designed into an asymmetric structure that the air inlet side is higher than the air outlet side, and the non-equal-height characteristic of the top surface of the piston can enable the squeezing flow strength generated by the air inlet side and the air outlet side to be different in the compression process, so that the airflow is guided to flow from one side of the air inlet valve to one side of the air outlet valve, and the tumble strength in the combustion chamber is further enhanced. Meanwhile, the non-equal-height design of the top surface of the piston can enable the compression clearance of the air inlet side and the air exhaust side to be different, so that air flow flows from the air inlet valve side to the air exhaust valve side, the air flow speed near the spark plug is increased, the turbulent kinetic energy distribution near the spark plug at the moment of ignition is optimized, the flame propagation speed is accelerated, the combustion speed of the area near the air exhaust valve side is accelerated, and the detonation risk can be effectively reduced. In addition, the piston top surface adopts the characteristic of large fillet transition between different height parts, so that the loss of vortex strength caused by unequal heights of the top can be reduced, the heat load of the transition part can be effectively reduced, the detonation risk is reduced, and the reliability of the piston is improved.
Preferably, the bottom surface of the cylinder cover above the piston is provided with two air inlet throat openings, a plane passing through the axis of the piston and perpendicular to the central connecting line of the two air inlet throat openings is a piston symmetry plane, the intersecting line of the combustion chamber and the piston symmetry plane comprises an air inlet side piston top surface molded line, a combustion chamber pit 1 molded line and an exhaust side piston top surface molded line which are sequentially connected, and the air inlet side piston top surface molded line and the exhaust side piston top surface molded line are perpendicular to the axis of the piston.
Further, in the embodiment of the invention, the major axis direction of the elliptic cross section is parallel to the central connecting line direction of the two air inlet throats (the direction of the section A), the molded line of the combustion chamber pit 1 is a circular arc line, more air flows enter the combustion chamber pit 1 in the air inlet process through the fact that the top surface of the piston at the air inlet side is higher than the top surface of the piston at the air outlet side, the semi-ellipsoidal pit shape is arranged on the top surface of the piston, and the elliptic major axis is vertical to the connecting line of the air inlet valve and the air outlet valve, so that the tumble flow in the main tumble direction is strengthened.
The ellipse corresponding to the joint of the combustion chamber pit 1 and the top surface of the air inlet side piston is an air inlet side pit ellipse, and the distance H1 between the bottom of the combustion chamber pit 1 and the top surface of the air inlet side piston is half of the length L2 of the short axis of the air inlet side pit ellipse, namely H1=0.5L 2.
Further, the major axis length L1 of the intake side dimple ellipse is 1.4 to 1.6 times the piston radius R1, i.e., L1= (1.4 to 1.6) R1, and the minor axis length L2 of the intake side dimple ellipse is 1.2 to 1.4 times the piston radius R1, i.e., L2= (1.2 to 1.4) R1.
Preferably, a projection of the top smooth transition surface on the symmetric plane (section B) of the piston is a top smooth transition surface profile, and the top smooth transition surface profile is a circular arc.
Further, in the embodiment of the present invention, the radius R2 of the top smooth transition surface profile is 0.3 to 0.6 times the piston radius R1, that is, R2= (0.3 to 0.6) R1.
Preferably, in the embodiment of the invention, the projection of the junction of the top surface of the piston at the air inlet side and the top smooth transition surface on the symmetrical plane of the piston is positioned on the axis of the piston.
In the embodiment of the present invention, the height difference H2 between the top surface of the intake side piston and the top surface of the exhaust side piston is 0.05 to 0.2 times the piston radius R1, that is, H2= (0.05 to 0.2) R1.
In the embodiment of the invention, as shown in fig. 3, the upper edge of the combustion chamber pit 1 is connected with the top surface of the piston through a fillet transition surface. Specifically, the radius R3 of the fillet transition surface is 0.05-0.1 times of the radius R1 of the piston.
The common working condition area is selected as a calculation working condition, the three-dimensional simulation calculation software is used for comparing the original scheme with the new design scheme, the result is shown in figures 4 to 6, according to the simulation result, at the ignition moment (-23 ℃), the tumble ratio of the new scheme is obviously higher than that of the original scheme, the swirl ratio of the new scheme and the tumble ratio of the new scheme are not greatly different, the heat release rate is advanced, and the heat release is accelerated.
The invention also provides a gas engine, which comprises the combustion chamber in the embodiment, and because the gas engine adopts the combustion chamber in the embodiment, the derivation process of the beneficial effect of the gas engine is substantially similar to the derivation process of the beneficial effect brought by the combustion chamber, and therefore the description is omitted.
It should be noted that, in this specification, each embodiment is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same as and similar to each other in each embodiment may be referred to.
It should be understood that the use of "system," "apparatus," "unit" and/or "module" herein, if any, is merely one way to distinguish between different components, elements, parts, portions or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" are intended to cover only the explicitly identified steps or elements as not constituting an exclusive list and that the method or apparatus may comprise further steps or elements. An element defined by the phrase "comprising an … …" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
Wherein in the description of the embodiments of the present application, "/" indicates an inclusive meaning, for example, a/B may indicate a or B; "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
If used herein, a flowchart is provided to illustrate operations performed by a system according to an embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to or removed from these processes.
It should also be noted that in this document, terms such as "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in an article or device comprising the same element.
The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (12)
1. A combustion chamber for a gas engine reformed from a diesel engine, the combustion chamber being used in combination with a weak tumble cylinder head structure, characterized in that the combustion chamber comprises a combustion chamber pit at the top of the piston and a piston top surface that surrounds the circumference of the combustion chamber pit, the piston top surface comprising an intake side piston top surface and an exhaust side piston top surface, the intake side piston top surface being higher than the exhaust side piston top surface, and the intake side piston top surface and the exhaust side piston top surface being connected by a top smooth transition surface, the surface of the combustion chamber pit being a portion of an ellipsoidal curved surface, the combustion chamber pit being along the axial cross section of the piston being an elliptical cross section.
2. The combustion chamber as claimed in claim 1, wherein two intake throats are provided on the bottom surface of the cylinder head above the piston, a plane passing through the axis of the piston and perpendicular to the center connecting line of the two intake throats is a piston symmetry plane, the intersection line of the combustion chamber and the piston symmetry plane includes an intake side piston top surface profile, a combustion chamber pit profile and an exhaust side piston top surface profile which are connected in sequence, and the intake side piston top surface profile and the exhaust side piston top surface profile are both perpendicular to the axis of the piston.
3. The combustion chamber as claimed in claim 2, wherein the major axis direction of the oval cross section is parallel to the central connecting line direction of the two air inlet throats, and the pit profile of the combustion chamber is a circular arc.
4. The combustion chamber of claim 3 wherein the ellipse corresponding to the junction of the combustion chamber pocket and the intake side piston top surface is the intake side pocket ellipse and the distance between the bottom of the combustion chamber pocket and the intake side piston top surface is half the length of the minor axis of the intake side pocket ellipse.
5. The combustion chamber set forth in claim 4 wherein the intake side pocket ellipse has a major axis length of 1.4 to 1.6 times a piston radius and a minor axis length of 1.2 to 1.4 times the piston radius.
6. The combustion chamber of claim 2 wherein the projection of the top smooth transition surface on the piston symmetry plane is a top smooth transition surface profile, and the top smooth transition surface profile is a circular arc.
7. The combustion chamber of claim 6 wherein the radius of the top smooth transition profile is between 0.3 and 0.6 times the piston radius.
8. The combustion chamber of claim 2 wherein a projection of the junction of the intake side piston top surface and the top smooth transition surface onto the piston symmetry plane is on the axis of the piston.
9. The combustion chamber claimed in any one of claims 1 to 8, wherein a difference in height between the intake-side piston top surface and the exhaust-side piston top surface is 0.05 to 0.2 times a piston radius.
10. The combustion chamber of any one of claims 1-8 wherein the upper edge of the combustion bowl is joined to the top surface of the piston by a radiused transition surface.
11. The combustor of claim 10, wherein said rounded transition surface has a radius of between 0.05 and 0.1 times a piston radius.
12. A gas engine characterized by comprising a combustion chamber according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679893.1A CN114753920A (en) | 2022-06-16 | 2022-06-16 | Combustion chamber and gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679893.1A CN114753920A (en) | 2022-06-16 | 2022-06-16 | Combustion chamber and gas engine |
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| CN114753920A true CN114753920A (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210679893.1A Pending CN114753920A (en) | 2022-06-16 | 2022-06-16 | Combustion chamber and gas engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405409A (en) * | 2022-09-20 | 2022-11-29 | 潍柴动力股份有限公司 | Combustion chamber and gas engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178717A (en) * | 1986-02-01 | 1987-08-05 | Mazda Motor Corp | Combustion chamber of internal combustion engine |
| JPH07145730A (en) * | 1993-11-26 | 1995-06-06 | Yamaha Motor Co Ltd | Piston for spark ignition engine with supercharger |
| JP2016121563A (en) * | 2014-12-24 | 2016-07-07 | 三菱自動車工業株式会社 | Piston for cylinder injection type engine |
| 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 |
-
2022
- 2022-06-16 CN CN202210679893.1A patent/CN114753920A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178717A (en) * | 1986-02-01 | 1987-08-05 | Mazda Motor Corp | Combustion chamber of internal combustion engine |
| JPH07145730A (en) * | 1993-11-26 | 1995-06-06 | Yamaha Motor Co Ltd | Piston for spark ignition engine with supercharger |
| JP2016121563A (en) * | 2014-12-24 | 2016-07-07 | 三菱自動車工業株式会社 | Piston for cylinder injection type engine |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405409A (en) * | 2022-09-20 | 2022-11-29 | 潍柴动力股份有限公司 | Combustion chamber and gas engine |
| CN115405409B (en) * | 2022-09-20 | 2024-05-17 | 潍柴动力股份有限公司 | Combustion chamber and gas engine |
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