CN112594081A - Water jacket structure of horizontally-opposed engine - Google Patents
Water jacket structure of horizontally-opposed engine Download PDFInfo
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- CN112594081A CN112594081A CN202011488566.5A CN202011488566A CN112594081A CN 112594081 A CN112594081 A CN 112594081A CN 202011488566 A CN202011488566 A CN 202011488566A CN 112594081 A CN112594081 A CN 112594081A
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/16—Cylinder liners of wet type
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention provides a water jacket structure of a horizontally-opposed engine, which comprises a water inlet cavity, a water jacket body and a water outlet cavity, wherein the water inlet cavity is communicated with the water jacket body and is positioned at the bottom of the water jacket body; the cooling liquid flows into the water jacket body from the water inlet cavity and then is discharged from the water outlet cavity to form a cooling water path flowing from bottom to top. The water jacket structure provided by the invention has the advantages that the structure of downward inlet and upward outlet is arranged, so that the cooling liquid flows from bottom to top, the cavitation phenomenon caused by accumulation of bubbles in the water jacket can be avoided, and the flowing dead zone caused by the gravity of the cooling liquid is avoided.
Description
Technical Field
The invention relates to the technical field of engine cooling, in particular to a water jacket structure of a horizontally-opposed engine.
Background
The water jacket has the function of transferring the temperature of the combustion chamber of the engine and the inner wall of the cylinder body to cooling liquid through heat conduction, and transferring heat generated in the working process of the engine through the cooling liquid. Because the cooling liquid needs to absorb heat in the process of flowing in the water jacket, bubbles can be generated in the cooling liquid under the influence of high temperature, and cavitation erosion phenomenon can be generated after the bubbles are accumulated in the water jacket, so that the normal work of the water jacket is influenced. In addition, the cylinder body and the cylinder cover need to be covered comprehensively in the flowing process of the cooling liquid, and due to the fact that the structure of the cylinder body and the structure of the cylinder cover are complex, the cooling liquid is prone to having flowing dead zones under the influence of gravity, and therefore the cooling liquid cannot exchange heat in time, and normal work of an engine is affected.
The utility model discloses a utility model patent that publication number is CN211950685U discloses horizontal opposition engine cylinder body, including left cylinder body and right cylinder body, the inside first water jacket that sets up of left side cylinder body, the inside second water jacket that sets up of right side cylinder body, first water jacket and second water jacket intercommunication, first water jacket and left cylinder body cast the shaping as an organic whole, and the second water jacket is cast the shaping as an organic whole with right cylinder body. In the flowing process of the cooling liquid in the engine cylinder body, air bubbles are easy to gather at the top of the joint surface, and the air bubbles are not beneficial to being discharged.
The utility model discloses a utility model patent that bulletin number is CN210714865U discloses an automobile engine's cooling water jacket, water jacket and cylinder cap upper water jacket under cylinder body water jacket, cylinder cap lower water jacket be located cylinder body water jacket top and communicate in the cylinder body water jacket, cylinder cap upper water jacket is located cylinder cap lower water jacket top and communicate in cylinder cap lower water jacket, be provided with circulation water inlet and circulation delivery port on the cylinder body water jacket respectively, be provided with two water jacket cotters on the cylinder body water jacket, the circulation delivery port is located between two water jacket cotters, the water jacket cotter will the cylinder body water jacket divide into water jacket inlet waters and water jacket outlet waters. The cooling liquid of the cooling water jacket flows along the horizontal direction approximately, and the cooling liquid causes the cooling liquid below the cylinder water jacket to flow slowly under the action of gravity, so that a flow dead zone is formed; the bubbles are accumulated at the top of the water jacket on the cylinder cover under the action of gravity, are not easy to discharge and are easy to cause bubble accumulation.
Disclosure of Invention
The invention provides a water jacket structure of a horizontally-opposed engine, aiming at solving the problems of cavitation caused by difficult discharge of air bubbles in the water jacket structure of the horizontally-opposed engine and the problem that a flow dead zone is formed by slow flowing of a cooling liquid below due to the self weight of the cooling liquid.
A water jacket structure of a horizontally-opposed engine comprises a water inlet cavity, a water jacket body and a water outlet cavity, wherein the water inlet cavity is communicated with the water jacket body and is positioned at the bottom of the water jacket body, and the water outlet cavity is communicated with the water jacket body and is positioned at the top of the water jacket body; the cooling liquid flows into the water jacket body from the water inlet cavity and then is discharged from the water outlet cavity to form a cooling water path flowing from bottom to top.
Furthermore, the water jacket body comprises a cylinder body water jacket and a cylinder cover water jacket, the cylinder body water jacket is respectively communicated with the water inlet cavity and the water outlet cavity, the cylinder cover water jacket is respectively communicated with the water inlet cavity and the water outlet cavity, and the cylinder body water jacket and the cylinder cover water jacket are mutually separated.
Further, the cylinder body water jacket comprises a cylinder body left water jacket and a cylinder body right water jacket, and the cylinder body left water jacket and the cylinder body right water jacket are separated through a first entity partition; the left water jacket of the cylinder body is communicated with the water inlet cavity through a first water inlet hole group and is communicated with the water outlet cavity through a first water outlet hole group; and the right water jacket of the cylinder body is communicated with the water inlet cavity through a second water inlet hole group and is communicated with the water outlet cavity through a second water outlet hole group.
Furthermore, the first water inlet hole group comprises at least two first water inlet holes, and the aperture of each first water inlet hole is sequentially increased along the direction from far away from the combustion chamber to near the combustion chamber; the second inlet opening group includes two at least second inlet openings, each the aperture of second inlet opening increases in proper order along keeping away from the combustion chamber to the direction that is close to the combustion chamber.
Furthermore, the water inlet direction of the first water inlet hole group is deviated from one side, away from the combustion chamber, of the cylinder water jacket, and the water inlet direction of the second water inlet hole group is also deviated from one side, away from the combustion chamber, of the cylinder water jacket.
Furthermore, the cylinder body left water jacket and the cylinder body right water jacket are respectively in a semicircular arc shape.
Furthermore, the water inlet cavity is close to the exhaust passage, the water outlet cavity is close to the air inlet passage, and the cooling liquid in the cylinder cover water jacket flows from the exhaust side to the air inlet side.
Furthermore, the cylinder cover water jacket comprises a first water channel positioned in the middle of the cylinder cover, and a second water channel and a third water channel which are respectively positioned on two sides of the cylinder cover; and second solid partitions are respectively arranged on two sides of the exhaust passage, so that a first branch and a second branch are formed on one side of the cylinder cover water jacket close to the water inlet cavity, the second water path is communicated with the first water path through the first branch, and the third water path is communicated with the first water path through the second branch.
Furthermore, the second water channel and the third water channel are respectively provided with an inclined surface which reduces the flow cross section at one side far away from the first water channel.
Furthermore, the spark plug is located on the first water path, and partial cooling liquid in the first water path flows to the spark plug from the area where the exhaust passage is located and then respectively converges to the second water path and the third water path.
Has the advantages that: 1. according to the water jacket structure of the horizontally-opposed engine, the water inlet cavity is arranged at the bottom of the water jacket body, and the water outlet cavity is arranged at the top of the water jacket body, so that the flow direction of cooling liquid flows from bottom to top; the bubbles float upwards under the action of gravity and move from bottom to top along with the cooling liquid, and are discharged from the water outlet cavity, so that the accumulation of the bubbles in the water jacket can be effectively avoided, and the cavitation phenomenon is avoided; because the cooling liquid directly moves from the water inlet cavity to the water outlet cavity from bottom to top, the cooling liquid at the bottom is prevented from generating a flowing dead zone due to the action of gravity.
2. According to the water jacket structure of the horizontally-opposed engine, the cylinder body water jacket and the cylinder cover water jacket are separated, so that the coolant in the cylinder body water jacket and the coolant in the cylinder cover water jacket are prevented from flowing in a staggered manner, and the flowing directions are kept to flow from bottom to top; the cylinder body water jacket is divided into the cylinder body left water jacket and the cylinder body right water jacket through the first entity partition, so that the coolant between the cylinder body left water jacket and the cylinder body right water jacket is prevented from flowing in a staggered mode, and the flowing direction of the coolant in the cylinder body water jacket is further guaranteed to be from bottom to top.
3. According to the water jacket structure of the horizontally-opposed engine, the water inlet hole is formed between the cylinder body water jacket and the water inlet cavity, and the aperture of the water inlet hole close to the combustion chamber is larger; through the separated cylinder body left water jacket and the cylinder body right water jacket, the cooling liquid in the cylinder body water jacket flows from bottom to top; the direct impact of water flow on the side wall of the cylinder water jacket close to the combustion chamber is reduced by enabling the flow direction of the water inlet hole to deviate to one side of the cylinder water jacket far away from the combustion chamber; the uniformity of the temperature distribution of the cylinder body water jacket in the circumferential direction is ensured through the matching of the structures.
4. According to the water jacket structure of the horizontally-opposed engine, disclosed by the invention, the cylinder cover water jacket is divided into the first water channel, the second water channel and the third water channel, and the flow direction of each water channel flows from the exhaust side to the air inlet side of the engine, so that the uniformity of the temperature distribution of the cylinder cover water jacket is ensured; the second entity partition is arranged on the cylinder cover water jacket to form a first branch and a second branch, and partial cooling liquid in the second water path and the third water path flows to the first water path from the first branch and the second branch respectively, so that the phenomenon that the cooling liquid in an exhaust passage area generates turbulent flow is avoided, and the flowing direction of the cooling liquid in the cylinder cover water jacket is further ensured to be from bottom to top.
Drawings
FIG. 1 is a schematic view of a water jacket structure of a horizontally opposed engine in an embodiment of the invention;
FIG. 2 is a front view of a water jacket structure of a horizontally opposed engine in an embodiment of the present invention;
FIG. 3 is a front view of a cylinder block water jacket in an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is a partial cross-sectional view of an intake chamber in an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a cylinder head water jacket according to an embodiment of the invention;
FIG. 7 is a front view of a cylinder head water jacket according to an embodiment of the present invention;
FIG. 8 is a side view of a cylinder head water jacket according to an embodiment of the present invention;
FIG. 9 is a cross-sectional view taken along line A-A of FIG. 8;
FIG. 10 is a simplified schematic illustration of a flow control system in an embodiment of the present invention.
Note that, in fig. 1 to 9, the dotted lines with arrows indicate the flow direction of the coolant.
Reference numerals: 1-a water inlet cavity; 2-water outlet cavity; 3-cylinder water jacket; 4-cylinder cover water jacket; 11-a first water inlet; 12-a second water inlet hole; 21-a first water outlet; 22-a second water outlet; 31-cylinder left water jacket; 32-cylinder right water jacket; 33-first physical partition; 41-a first water circuit; 42-a second water circuit; 43-a third water circuit; 44-a second physical partition; 45-first branch; 46-a second branch; 47-inclined plane; 51-an air inlet channel; 52-an exhaust passage; 53-spark plug.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a water jacket structure of a horizontally opposed engine, including a water inlet cavity 1, a water jacket body, and a water outlet cavity 2, where the water inlet cavity 1 is communicated with the water jacket body and is located at the bottom of the water jacket body, and the water outlet cavity 2 is communicated with the water jacket body and is located at the top of the water jacket body; after the cooling liquid flows into the water jacket body from the water inlet cavity 1, the cooling liquid is discharged from the water outlet cavity 2 to form a cooling water path flowing from bottom to top.
In the embodiment, the arrangement mode of cylinders of the engine is a horizontal opposite mode, the cylinder of the engine is wrapped by the water jacket body to cool the cylinder, the water inlet cavity 1 is arranged at the bottom of the water jacket body, and the water outlet cavity 2 is arranged at the top of the water jacket body; wherein, the bottom of the water jacket body refers to the bottom of the water jacket body in the vertical direction, and the top of the water jacket body refers to the top of the water jacket body in the vertical direction. The cooling liquid enters from the water inlet cavity 1 and flows through the water jacket body and then is discharged from the water outlet cavity 2, the cooling liquid of the water jacket structure adopts a mode of downward inlet and upward outlet, the flowing direction of the cooling liquid in the water jacket body is from bottom to top, and in the flowing process of the cooling liquid, bubbles generated due to high temperature in the cooling liquid float upward under the influence of gravity, can be discharged in time along with the cooling liquid, and the cavitation phenomenon caused by the accumulation of the bubbles is avoided. Because the flowing direction of the cooling liquid in the water jacket body is from bottom to top, the uniform direction can be always kept in the flowing process of the cooling liquid, the cooling liquid does not flow in the horizontal direction, the problem that the flow velocity of the cooling liquid at the bottom is relatively slow due to the influence of gravity is avoided, and the generation of a flowing dead zone is avoided.
In this embodiment, the vertical center line of intake antrum 1 and the vertical center line collineation of play water cavity 2, and perpendicular with the axis of cylinder, the flow in-process of coolant liquid in cylinder body water jacket 3 keeps vertical ascending flow trend throughout, further guarantees that the bubble can be in time discharged along with the flow of coolant liquid.
As shown in fig. 1 and 2, in the present embodiment, the water jacket body includes a cylinder water jacket 3 and a cylinder cover water jacket 4, the cylinder water jacket 3 is used for cooling the cylinder, the cylinder cover water jacket 4 is used for cooling the cylinder cover, the cylinder water jacket 3 is respectively communicated with the water inlet cavity 1 and the water outlet cavity 2, the cylinder cover water jacket 4 is respectively communicated with the water outlet cavity 2 of the water inlet cavity 1, and the cylinder water jacket 3 and the cylinder cover water jacket 4 are isolated from each other. In the flowing process of the cooling liquid, the cooling liquid flows into the cylinder body water jacket 3 and the cylinder cover water jacket 4 from the water inlet cavity 1 respectively, then the cooling liquid in the cylinder body water jacket 3 and the cylinder cover water jacket 4 converges into the water outlet cavity 2 and is discharged from the water outlet cavity 2, the cylinder cover water jacket 4 and the cylinder body water jacket 3 are mutually separated, the cooling liquid in the cylinder body water jacket 3 and the cylinder cover water jacket 4 cannot flow in a staggered mode, the cooling liquid in the cylinder body water jacket 3 and the cylinder cover water jacket 4 can be guaranteed to flow from bottom to top, and therefore the cavitation phenomenon and the flowing dead zone are avoided.
As shown in fig. 3 and 4, in the present embodiment, the block water jacket 3 includes a block left water jacket 31 and a block right water jacket 32, and the block left water jacket 31 and the block right water jacket 32 are separated by a first solid partition 33; the cylinder body left water jacket 31 is communicated with the water inlet cavity 1 through a first water inlet hole group and is communicated with the water outlet cavity 2 through a first water outlet hole group; the cylinder body right water jacket 32 is communicated with the water inlet cavity 1 through a second water inlet hole group and communicated with the water outlet cavity 2 through a second water outlet hole group. Specifically, a first entity partition 33 is respectively arranged on one side of the cylinder water jacket 3 close to the water inlet cavity 1 and one side of the cylinder water jacket close to the water outlet cavity 2, the cylinder water jacket 3 is divided into two semicircular arc-shaped and relatively independent cylinder left water jacket 31 and cylinder right water jacket 32 through the first entity partition 33, the cylinder left water jacket 31 is respectively communicated with the water inlet cavity 1 and the water outlet cavity 2 through a first water inlet hole group and a first water outlet hole group, and the cylinder right water jacket 32 is respectively communicated with the water inlet cavity 1 and the water outlet cavity 2 through a second water inlet hole group and a second water outlet hole group. After entering the cylinder left water jacket 31 and the cylinder right water jacket 32 from the water inlet chamber 1, the coolant flows from bottom to top along the side walls of the cylinder left water jacket 31 and the cylinder right water jacket 32, so that the coolant of the cylinder left water jacket 31 and the cylinder right water jacket 32 is prevented from flowing from top to bottom at the liquid inlet side and the liquid discharge side in a cross manner, and the flowing direction of the coolant in the cylinder left water jacket 31 and the cylinder right water jacket 32 is further ensured to be from bottom to top.
In the embodiment, the cylinder water jacket 3 is divided into the cylinder left water jacket 31 and the cylinder right water jacket 32 which are independent of each other by the first solid partition 33, so that when the cooling liquids of the cylinder left water jacket 31 and the cylinder right water jacket 32 converge to the water outlet cavity 2, the cooling liquids between the cylinder left water jacket 31 and the cylinder right water jacket 32 are prevented from being staggered with each other, and the turbulent flow phenomenon is avoided.
As shown in fig. 5, in the present embodiment, the first water inlet hole group includes three independent first water inlet holes 11, the three first water inlet holes 11 are arranged in the axial direction of the cylinder, and the diameter of the first water inlet hole 11 is larger closer to the combustion chamber; the second water inlet hole group comprises three independent second water inlet holes 12, the three second water inlet holes 12 are arranged along the axial direction of the cylinder body, and the diameter of the second water inlet hole 12 which is closer to the combustion chamber is larger. Because the temperature of the combustion chamber is higher than other parts of the cylinder body, the flow of the cooling liquid entering the area where the combustion chamber is located is larger by setting the aperture of the water inlet hole, the cooling effect on the area where the combustion chamber is located is improved, and the uniformity of the temperature distribution of the cylinder body water jacket 3 in the axial direction is ensured. The number of the first water inlet holes 11 or the second water inlet holes 12 is not limited to three, and may be two or more, and when the number of the first water inlet holes 11 or the second water inlet holes 12 is plural, the first water inlet holes 11 or the second water inlet holes 12 close to the combustion chamber have smaller gaps relative to the first water inlet holes 11 or the second water inlet holes 12 far away from the combustion chamber, and are arranged more closely, thereby increasing the flow rate of the region where the combustion chamber is located. In this embodiment, the first outlet hole group also includes three first outlet holes 21, the second outlet hole group also includes three second outlet holes 22, and the number of the first outlet holes 21 or the second outlet holes 22 is not limited to three, and may be two or more.
As shown in fig. 4, in the present embodiment, the water inlet direction of the first water inlet hole group is offset to the side of the block water jacket 3 away from the combustion chamber, and the water inlet direction of the second water inlet hole group is also offset to the side of the block water jacket 3 away from the combustion chamber. The cooling liquid of the first water inlet hole group or the second water inlet hole group is prevented from impacting the side wall of the cylinder water jacket 3 close to one side of the combustion chamber in the liquid inlet process, so that the cooling liquid is concentrated along the outer side close to the cylinder water jacket 3, the heat absorption of the cooling liquid in the area close to the water inlet cavity 1 is reduced, and the uniformity of cooling the cylinder is ensured.
In the embodiment, a water jacket structure with a lower inlet and an upper outlet is arranged, so that the flow direction of the cooling liquid in the water jacket body is from bottom to top; the cylinder cover water jacket 4 and the cylinder body water jacket 3 are separated, and the cylinder body water jacket 3 is separated into a semi-arc-shaped cylinder body left water jacket 31 and a semi-arc-shaped cylinder body right water jacket 32 through a first solid partition 33, so that the flowing directions of cooling liquid in the cylinder cover water jacket 4, the cylinder body left water jacket 31 and the cylinder body right water jacket 32 are further ensured to be from bottom to top respectively. The cylinder body water jacket 3 is communicated with the water inlet cavity 1 in a water inlet hole mode, so that the coolant entering the cylinder body water jacket 3 has enough kinetic energy to flow upwards along the cylinder body water jacket 3, and the uniformity of the temperature distribution of the cylinder body water jacket 3 in the circumferential direction is ensured by matching the aperture size and the arrangement mode of the first water inlet holes 11 or the second water inlet holes 12.
Example 2
The present embodiment provides a water jacket structure of a horizontally opposed engine, including the water jacket structure of embodiment 1, which is different from embodiment 1 in that the present embodiment further includes the following.
As shown in fig. 6, in the present embodiment, the water inlet chamber 1 is close to the exhaust passage 52, the water outlet chamber 2 is close to the intake passage 51, and the coolant in the head jacket 4 flows from the exhaust side to the intake side. Because the temperature of the exhaust passage 52 is higher than that of the inlet passage 51, the cooling liquid flows from the exhaust side to the inlet side, the cooling effect on the exhaust passage 52 is improved, and the uniformity of cooling the cylinder cover is ensured.
As shown in fig. 8, in the present embodiment, the cylinder head water jacket 4 includes a first water passage 41 located in the middle of the cylinder head, and a second water passage 42 and a third water passage 43 located on both sides of the cylinder head, respectively; and second solid partitions 44 are respectively arranged on two sides of the exhaust passage 52, so that a first branch 45 and a second branch 46 are formed on one side of the cylinder head water jacket 4 close to the water inlet cavity 1, the second water passage 42 is communicated with the first water passage 41 through the first branch 45, and the third water passage 43 is communicated with the first water passage 41 through the second branch 46. A first branch 45 and a second branch 46 are formed on one side, close to the water inlet cavity 1, of the cylinder cover water jacket 4 through a second solid partition 44, and cooling liquid is prevented from flowing in a scattered mode in the region of the exhaust passage 52; the flow directions of the cooling liquid in the first water channel 41, the second water channel 42 and the third water channel 43 are from bottom to top, the cooling liquid is respectively concentrated in the first water channel 41, the second water channel 42 and the third water channel 43, the flow direction of the cooling liquid in the cylinder head water jacket 4 is further ensured to be from bottom to top, and cavitation and flow dead zones are further avoided from being generated in the cylinder head water jacket 4.
As shown in fig. 8, in the present embodiment, the spark plug 53 is located on the first water passage 41, and after a part of the coolant in the first water passage 41 flows from the region where the exhaust passage 52 is located to the region where the spark plug 53 is located, the coolant is merged to the second water passage 42 and the third water passage 43, respectively. As shown in fig. 9, inclined surfaces 47 that reduce the flow cross section are formed on the sides of the second water passage 42 and the third water passage 43 that are away from the first water passage 41. The included angle formed by the inclined surface 47 and the side surface of the cylinder cover is alpha, and the angle of the alpha is 30-60 degrees. By reducing the flow cross section of the second water passage 42 and the third water passage 43, the coolant is concentrated in the first water passage 41, and the area where the ignition plug 53 is located is preferably cooled, and when the coolant in the first water passage 41 flows to the area where the ignition plug 53 is located, the coolant is respectively merged into the second water passage 42 and the third water passage 43, and the periphery of the ignition plug 53 is uniformly cooled.
In this embodiment, the cylinder head water jacket 4 is divided into the first water channel 41, the second water channel 42 and the third water channel 43, and the second solid partition 44 is provided to avoid the scattered flow of the coolant in the region of the exhaust passage 52, thereby further ensuring that the flow direction of the coolant in the first water channel 41, the second water channel 42 and the third water channel 43 is from bottom to top. By reducing the flow cross section of the second water passage 42 and the third water passage 43, the coolant is concentrated in the first water passage 41, the cooling effect on the spark plug 53 is improved, and the uniformity of cylinder head cooling is ensured.
Example 3
As shown in fig. 10, the present embodiment provides a flow control system of a horizontally opposed engine water jacket structure, and includes the water jacket structure of embodiment 1, in this embodiment, a first micro valve is respectively installed on each first water inlet hole 11 of the first water inlet hole group, and the flow rate of each first water inlet hole 11 is controlled by the first micro valve, and a second micro valve is respectively installed on each second water inlet hole group of the second water inlet hole group, and the flow rate of the second water inlet hole 12 is controlled by the second micro valve; each first water outlet hole 21 of the first water outlet hole group is respectively provided with a first bubble detection sensor, the number and the size of bubbles passing through the first water outlet hole 21 are monitored through the first bubble detection sensors, each second water outlet hole 22 of the second water outlet hole group is respectively provided with a second bubble detection sensor, and the number and the size of bubbles passing through the second water outlet hole 22 are monitored through the second bubble detection sensors; a third bubble detection sensor is arranged at one end of the cylinder cover water jacket 4 close to the water outlet cavity 2, and the quantity and the size of bubbles discharged through the cylinder cover water jacket 4 are monitored through the third bubble detection sensor; the control system further comprises a controller, the first micro valve and the second micro valve are respectively connected with the controller, and the first bubble detection sensor, the second bubble detection sensor and the third bubble detection sensor are also respectively connected with the controller.
In the embodiment, the number and the size of the bubbles generated in the cylinder left water jacket 31, the cylinder right water jacket 32 and the cylinder head water jacket 4 are respectively monitored by the first bubble sensor, the second bubble sensor and the third bubble sensor, and are converted into electric signals to be transmitted to the controller. The higher the temperature is, the larger the number of bubbles generated in the water jacket and the larger the bubble diameter of the bubbles are, and the cooling conditions of the cooling liquid in the cylinder left water jacket 31, the cylinder right water jacket 32, and the cylinder head water jacket 4 can be known by the number and the size of the bubbles. The controller adjusts the flow of the first micro valve and the second micro valve according to the cooling condition of the cooling liquid in each water jacket, so that the flow of the water inlet cavity 1 entering the cylinder body left water jacket 31, the cylinder body right water jacket 32 and the cylinder cover water jacket 4 is adjusted, and the cooling in each water jacket is more uniform.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications can be made without departing from the spirit of the invention, and all the properties or uses are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a water jacket structure of level opposition engine, includes intake antrum (1), water jacket body and play water cavity (2), its characterized in that: the water inlet cavity (1) is communicated with the water jacket body and is positioned at the bottom of the water jacket body, and the water outlet cavity (2) is communicated with the water jacket body and is positioned at the top of the water jacket body; the cooling liquid flows into the water jacket body from the water inlet cavity (1) and then is discharged through the water outlet cavity (2) to form a cooling water path flowing from bottom to top.
2. The water jacket structure of a horizontally opposed engine according to claim 1, wherein: the water jacket body comprises a cylinder body water jacket (3) and a cylinder cover water jacket (4), the cylinder body water jacket (3) is communicated with the water inlet cavity (1) and the water outlet cavity (2) respectively, the cylinder cover water jacket (4) is communicated with the water inlet cavity (1) and the water outlet cavity (2) respectively, and the cylinder body water jacket (3) and the cylinder cover water jacket (4) are mutually separated.
3. The water jacket structure of a horizontally opposed engine according to claim 2, wherein: the cylinder body water jacket (3) comprises a cylinder body left water jacket (31) and a cylinder body right water jacket (32), and the cylinder body left water jacket (31) and the cylinder body right water jacket (32) are separated by a first solid partition (33); the left water jacket (31) of the cylinder body is communicated with the water inlet cavity (1) through a first water inlet hole group and is communicated with the water outlet cavity (2) through a first water outlet hole group; the cylinder body right water jacket (32) is communicated with the water inlet cavity (1) through a second water inlet hole group and is communicated with the water outlet cavity (2) through a second water outlet hole group.
4. The water jacket structure of a horizontally opposed engine according to claim 3, wherein: the first water inlet hole group comprises at least two first water inlet holes (11), and the hole diameter of each first water inlet hole (11) is sequentially increased along the direction from far away from the combustion chamber to near the combustion chamber; the second inlet opening group includes two at least second inlet openings (12), each the aperture of second inlet opening (12) increases in proper order along keeping away from the combustion chamber to the direction that is close to the combustion chamber.
5. The water jacket structure of a horizontally opposed engine according to claim 3 or 4, wherein: the water inlet direction of the first water inlet hole group is deviated from one side of the cylinder body water jacket (3) far away from the combustion chamber, and the water inlet direction of the second water inlet hole group is also deviated from one side of the cylinder body water jacket (3) far away from the combustion chamber.
6. The water jacket structure of a horizontally opposed engine according to claim 3 or 4, wherein: the cylinder body left water jacket (31) and the cylinder body right water jacket (32) are respectively in a semicircular arc shape.
7. The water jacket structure of a horizontally opposed engine according to claim 2, wherein: the water inlet cavity (1) is close to the exhaust passage (52), the water outlet cavity (2) is close to the air inlet passage (51), and cooling liquid in the cylinder cover water jacket (4) flows to the air inlet side from the exhaust side.
8. The water jacket structure of a horizontally opposed engine as set forth in claim 7, wherein: the cylinder cover water jacket (4) comprises a first water channel (41) positioned in the middle of the cylinder cover, and a second water channel (42) and a third water channel (43) which are respectively positioned on two sides of the cylinder cover; and second solid partitions (44) are respectively arranged on two sides of the exhaust passage (52), so that a first branch (45) and a second branch (46) are formed on one side, close to the water inlet cavity (1), of the cylinder cover water jacket (4), the second water channel (42) is communicated with the first water channel (41) through the first branch (45), and the third water channel (43) is communicated with the first water channel (41) through the second branch (46).
9. The water jacket structure of a horizontally opposed engine as set forth in claim 8, wherein: inclined surfaces (47) with reduced flow cross sections are respectively formed on the sides of the second water channel (42) and the third water channel (43) far away from the first water channel (41).
10. The water jacket structure of a horizontally opposed engine as set forth in claim 8, wherein: the spark plug (53) is positioned on the first water channel (41), and partial cooling liquid in the first water channel (41) flows to the region of the spark plug (53) from the region of the exhaust channel (52) and then is converged to the second water channel (42) and the third water channel (43) respectively.
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| CN112594081B (en) | 2021-08-27 |
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