CN112576401B - Double-deck cylinder head water jacket, cylinder and vehicle - Google Patents

Abstract

The invention is suitable for the field of vehicles, and discloses a double-layer cylinder cover water jacket, a cylinder and a vehicle, which comprises an upper layer water jacket and a lower layer water jacket, wherein the upper layer water jacket and the lower layer water jacket are superposed up and down, the upper layer water jacket is provided with an upper water cavity for containing cooling water and a water outlet for discharging the cooling water out of the upper water cavity, the lower layer water jacket is provided with a lower water cavity for containing the cooling water and a water inlet for introducing the cooling water into the lower water cavity, the lower water cavity is provided with a combustion chamber area corresponding to the upper part of a combustion chamber of the cylinder, the combustion chamber area comprises an exhaust valve area, a communication hole for communicating the upper water cavity with the lower water cavity is arranged between the upper layer water jacket and the lower layer water jacket, and the communication hole is positioned close to the exhaust valve area. The invention further provides the cylinder and the vehicle. According to the double-layer cylinder cover water jacket, the cylinder and the vehicle, cooling water can be guided to a high-heat area of the cylinder cover, so that the generation of a water flow dead zone is avoided, and the cooling effect of a key high-heat part meets the requirement.

Description

A double-layer cylinder head water jacket, cylinder and vehicle

technical field

The invention belongs to the field of vehicles, and in particular relates to a double-layer cylinder head water jacket, a cylinder and a vehicle.

Background technique

With the continuous development of engine-related technologies, the power density of the engine continues to increase, and the requirements for components are becoming more and more demanding. As one of the most critical components of the engine, the reliability of the cylinder head is closely related to the casting process and cooling effect. The cylinder head has a water jacket to cool the heat generated in the combustion chamber and other components used for the mechanical operation of the engine to prevent the engine from overheating and maintain the engine at the proper temperature for optimum thermal efficiency. The use of a double-layer water jacket can well satisfy the effect of preferentially strengthening the cooling in the high-temperature area of the bottom surface of the cylinder head, but the casting process of the double-layer water jacket cylinder head also becomes more complicated. The connection position of the upper and lower water jackets is prone to burrs during the casting process, and the high-heat area of the combustion chamber is prone to water flow dead zones, which do not meet the cooling requirements, resulting in cracking of the cylinder head and even the entire engine being scrapped.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the above-mentioned technical problems, and provides a double-layer cylinder head water jacket, a cylinder and a vehicle, which can solve the problem of burrs at the joints of the upper and lower water jackets in the casting process, and can drain the cooling water to a high level. The hot area makes the cooling effect of the key high-heat parts meet the requirements.

The technical scheme of the present invention is: a double-layered cylinder head water jacket, comprising an upper water jacket and a lower water jacket, the upper water jacket and the lower water jacket are stacked up and down, and the upper water jacket has a water jacket for accommodating cooling an upper water cavity for water and a water outlet for discharging cooling water from the upper water cavity, the lower water jacket has a lower water cavity for accommodating cooling water and a water inlet for introducing cooling water into the lower water cavity, The lower water chamber has a combustion chamber area corresponding to the upper part of the combustion chamber of the cylinder, the combustion chamber area includes an exhaust valve area, and a connection between the upper water jacket and the lower water jacket is provided for communicating with the upper water chamber and the upper water chamber. The communication hole of the lower water chamber, the communication hole is located near the exhaust valve area.

Optionally, the combustion chamber area includes two adjacent exhaust valve areas and two adjacent intake valve areas, two of the exhaust valve areas and two of the intake valve areas above and below set up;

The combustion chamber region includes an intake nose bridge region between adjacent intake valve regions, an exhaust nose bridge region between adjacent exhaust valve regions, and adjacent intake valve and exhaust valve regions. Intake and exhaust nose bridge area between valves;

The lower water jacket is provided with a drainage structure, and the drainage structure is used for drainage of cooling water so that the cooling water flows through the nose bridge area of the intake and exhaust.

Optionally, there are multiple combustion chamber regions, multiple flow guiding structures are provided, and there is one combustion chamber region between adjacent flow guiding structures.

Optionally, the drainage structure is arranged on the top of the lower water jacket, and the two sides are close to the intake and exhaust nose bridge regions corresponding to the two adjacent combustion chamber regions, and the drainage structure is relatively deep in the center and has two sides on both sides. A pit structure with a shallower depth of the intake and exhaust nose bridge areas on both sides;

Alternatively, the drainage structure is a convex structure disposed in the lower water cavity, and the convex structure is a convex structure with a relatively high center height and the closer the two sides are to the two sides, the lower the height of the intake and exhaust nose bridge regions. rise.

Optionally, the cross section of the pit structure is V-shaped, trapezoidal or semi-circular.

Optionally, the communication hole is provided at the nose bridge region of the exhaust valve or/and the nose bridge region of the intake valve.

Optionally, a plurality of the communication holes are provided, and there are two exhaust valve areas or two intake valve areas between two adjacent communication holes.

Optionally, the water inlet is arranged on one side of the lower water jacket, and the water outlet is arranged on a side of the upper water jacket away from the water inlet.

The present invention also provides a cylinder, including a cylinder head and a cylinder body, the cylinder head is connected with the above-mentioned double-layer cylinder head water jacket, the bottom surface of the cylinder head is provided with a cylinder head bottom hole, and the cylinder head bottom hole is connected with the cylinder head. The positions of the communication holes correspond to each other.

The present invention also provides a vehicle having the above cylinder.

The invention provides a double-layer cylinder head water jacket, a cylinder and a vehicle. By rationally arranging the positions of the upper and lower water jacket communication holes, the cooling of key high-temperature parts is better, and by connecting the bottom holes of the cylinder head corresponding to the water jackets The holes are arranged so that the communication holes can be observed after the cylinder head is cast and the burrs at the positions of the communication holes can be removed, thereby improving the yield of casting the cylinder head and improving the production efficiency. The drainage structure arranged in the high-heat area can drain the cooling water to the high-heat location to cool the high-heat location. The cooling water preferentially flows through the intake and exhaust nose bridge areas on both sides to achieve the effect of draining cooling water, thereby cooling the intake and exhaust nose bridge areas. The water inlet and outlet are set on different sides to meet the uniformity of cylinder head cooling.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the three-dimensional structure schematic diagram of the double-layer cylinder head water jacket provided by the embodiment of the present invention;

2 is a top view of a lower layer water jacket of a double-layer cylinder head water jacket provided by an embodiment of the present invention;

Fig. 3 is a partial enlarged view at A in Fig. 1;

FIG. 4 is a bottom view of a cylinder head in a cylinder provided by an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

It should be noted that the terms "arrangement" and "connection" should be understood in a broad sense, for example, it may be directly arranged and connected, or indirectly arranged and connected through a central component or a central structure.

In addition, if there are "vertical", "horizontal", "length", "width", "thickness", "top", "bottom", "front", "rear", "left", " "Right", "vertical", "horizontal", "top", "bottom", "inside", "outside" etc. indicate the terms of orientation or positional relationship, which are based on the orientation or positional relationship shown in the drawings or conventional The placement state or the use state is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed in a specific orientation and operation, and therefore should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

Each specific technical feature and each embodiment described in the detailed description can be combined in any suitable manner under the circumstance that is not contradictory, for example, different specific technical features/embodiments can be combined to form different implementations In order to avoid unnecessary repetition, various possible combinations of specific technical features/embodiments in the present invention will not be described separately.

As shown in FIGS. 1 and 2 , a double-layer cylinder head water jacket provided by an embodiment of the present invention includes an upper water jacket 1 and a lower water jacket 2 , and the upper water jacket 1 and the lower water jacket 2 are stacked on top of each other. The upper water jacket 1 has an upper water cavity (not shown in the figure) for accommodating cooling water and a water outlet 11 for discharging the cooling water from the upper water cavity, and the lower water jacket 2 has a A lower water chamber (not shown) for accommodating cooling water and a water inlet 22 for introducing cooling water into the lower water chamber, the lower water chamber has a combustion chamber area 21 corresponding to the upper part of the combustion chamber 43 of the cylinder, the combustion chamber The area 21 corresponds to the area above the combustion chamber 43 of the cylinder (when the double-layer cylinder head water jacket is assembled to the cylinder), the combustion chamber area 21 includes the exhaust valve area 212, and the exhaust valve area 212 corresponds to the cylinder exhaust valve In the upper area, between the upper water jacket 1 and the lower water jacket 2, there is a communication hole 3 for connecting the upper water cavity and the lower water cavity, and the communication hole 3 is located near the exhaust valve. The area 212 is the area where the communication hole 3 is located above the exhaust valve of the cylinder.

Through this design, the cooling water flows into the lower water cavity from the water inlet 22 located in the lower water jacket 2, and the cooling water in the lower water cavity flows into the upper water cavity through the communication hole 3 between the upper and lower water jackets 2, and then flows from the upper water cavity to the upper water cavity. The water outlet 11 of the sleeve 1 flows out, and the position of the communication hole 3 is reasonably set, and it is set close to the exhaust valve area 212. The exhaust valve area 212 is a high-heat area, and the communication hole 3 is arranged in this area so that the cooling water can be fully Cool this area and flow into the upper water cavity. In specific applications, a cylinder head bottom hole 44 can be set at the lower part of the cylinder head 4 corresponding to the communication hole 3, and the communication hole 3 can be set in this area through the cylinder head bottom hole of the cylinder head 4. 44. The communication hole 3 is observed. After the cylinder head 4 is cast, it is possible to observe whether there is a burr at the position of the communication hole 3 through the communication hole 3 of the cylinder head 4. If there is a burr, the burr can be easily removed.

Specifically, as shown in FIGS. 2 and 4 , as an optional embodiment of the present invention, the combustion chamber area 21 includes two adjacent exhaust valve areas 212 and two adjacent intake valves In the area 211 , the two exhaust valve areas 212 and the two intake valve areas 211 are arranged up and down, that is, the two adjacent exhaust valve areas 212 and the two adjacent intake valve areas 211 are arranged in an upper and lower direction. A matrix of two rows and two columns is arranged in the combustion chamber area 21 .

The combustion chamber region 21 includes an intake valve nose bridge region 214 , an exhaust valve nose bridge region 215 and an intake and exhaust nose bridge region 216 . The intake valve nose bridge area 214 is located between the adjacent intake valve areas 211, the exhaust valve nose bridge area 215 is located between the adjacent exhaust valve areas 212, and the intake and exhaust nose bridge area 216 is located adjacent to the intake valve area 212. Between the valve and the exhaust valve, when applied to a gasoline internal combustion engine, the combustion chamber area 21 may further include a spark plug area 213, and the spark plug area 213 is located in the middle of the combustion chamber area 21, that is, the intake valve area 213. the middle of the exhaust nose bridge area 216;

The lower water jacket 2 is provided with a drainage structure 23 , and the drainage structure 23 is used for drainage of cooling water so that the cooling water can flow through the air intake and exhaust nose bridge region 216 more fully.

Through such a design, the intake valve area 211 and the exhaust valve area 212 are respectively used at the positions above the intake port 42 and the exhaust port 41 corresponding to the cylinder, and the intake valve area 211 and the exhaust valve area 212 can be adjusted according to the actual cylinder. Generally, each combustion chamber 43 corresponds to 1 to 2 exhaust valve areas 212 and intake valve areas 211, preferably 2 in this embodiment, and the nose bridge area corresponding to each area is the heating area of the cylinder head, In the actual situation, due to the large area of the intake and exhaust nose bridge area 216, insufficient water flow is likely to occur in this area, resulting in the formation of a water flow dead zone in the intake and exhaust nose bridge area 216 during the flow of the cooling water, thus failing to meet the cooling requirements , in order to cause the cylinder head to crack, or even the engine to be scrapped, the present invention is provided with a drainage structure 23 in this area, which can drain the cooling water to the intake and exhaust nose bridge area 216, so as to avoid the formation of a water flow dead zone in this area, so that this area can be fully cooled .

Specifically, as shown in FIG. 2 , as an optional embodiment of the present invention, there are multiple combustion chamber regions 21 , multiple drainage structures 23 are provided, and adjacent drainage structures 23 are provided with One of the combustion chamber regions 21 .

In a specific application, there are generally multiple combustion chambers 43 in an engine cylinder, and there are also multiple corresponding diversion structures 23 to meet the cooling requirements. In this embodiment, the number of combustion chambers 43 is preferably four. Similarly, the number of combustion chambers There are four regions 21 and five drainage structures 23 , which means that there is one combustion chamber region 21 between adjacent drainage structures 23 , and this design can meet the cooling requirements of the intake and exhaust nose bridge regions 216 .

Specifically, as an optional embodiment of the present invention, the drainage structure 23 is a raised structure disposed in the lower water cavity, and the raised structure has a relatively high center height and the closer the two sides are to the two sides. The lower height of the air intake and exhaust nose bridge area 216 is raised. In specific applications, the lower water jacket 2 is generally a thin shell structure. As shown in FIGS. 1 to 3 , the drainage structure 23 can also be understood as being arranged in The top and both sides of the lower water jacket 2 are close to the intake and exhaust nose bridge regions 216 of the two adjacent combustion chamber regions 21 , and the drainage structure 23 is relatively deep in the center and the two sides are closer to the intake and exhaust on both sides. A pit structure with a shallower depth of the air nose bridge area 216; through this design, since the lower water jacket 2 is closer to the cylinder, the received heat will be more than that of the upper water jacket 1. Therefore, the drainage structure 23 It is arranged on the lower water jacket 2, and is close to the intake and exhaust nose bridge regions 216 corresponding to the two adjacent combustion chamber regions 21. The drainage structure 23 is arranged on the top of the lower water jacket 2, the center is relatively deep, and the two sides are opposite to each other. A pit structure with a shallower depth near the intake and exhaust nose bridge regions 216 on both sides, the drainage structure 23 can also be understood as being arranged in the sewer cavity and the center height is relatively high. The two sides are closer to the height of the intake and exhaust nose bridge regions 216 on both sides. The lower the convex structure, whether it is a pit structure or a convex structure, the purpose is to compress the water flow space in the lower water cavity at the center of the drainage structure 23, and the water flow space on both sides will gradually widen outward. When passing through this position, the cooling water will preferentially flow to both sides, and the water flow on both sides is more, avoiding the generation of dead water flow, so as to achieve the effect of cooling the intake and exhaust nose bridge areas 216 on both sides of the drainage structure 23. In actual situations, the upper water jacket 1 can also add a drainage structure 23 to enhance the cooling effect.

Specifically, as shown in FIG. 3 , as an optional embodiment of the present invention, the cross section of the pit structure may be V-shaped, trapezoidal or semi-circular.

In specific applications, the cross-section of the pit structure is not limited to V-shape, trapezoid or semicircle, as long as the cross-section is a pit structure that becomes shallower from the middle to both sides. Structures with lower sides are available.

Specifically, as shown in FIG. 2 , as an optional embodiment of the present invention, the communication hole 3 is disposed at the exhaust valve nose bridge region 215 or/and the intake valve nose bridge region 214 .

In the specific application, the communication hole 3 is mainly used to connect the upper water cavity and the lower water cavity, and to introduce the cooling water of the lower water cavity into the upper water cavity. The water flow velocity of the communication hole 3 is fast and the water flow rate is large. The communication hole 3 is provided at the nose bridge region 214 of the intake valve and the intake valve, which can improve the cooling effect there.

Specifically, as shown in FIG. 2 , as an optional embodiment of the present invention, there are multiple communication holes 3 , and there are two exhaust valve regions between two adjacent communication holes 3 212 or both intake valve areas 211 .

In the specific application, in order to fully introduce the cooling water in the lower water cavity into the upper water cavity, a plurality of communication holes 3 are arranged on the lower water jacket 2. At the same time, due to the limited space of the water jacket, the adjacent two connected There are two intake and exhaust nose bridge areas 216 or exhaust valve areas 212 between the holes 3. This design not only utilizes the space effectively, but also ensures that enough cooling water in the lower water chamber can be smoothly introduced into the upper water chamber.

Specifically, as shown in FIG. 1 to FIG. 3 , as an optional embodiment of the present invention, the water inlet 22 is arranged on one side of the lower water jacket 2 , and the water outlet 11 is arranged on the upper water jacket 2 . Cover 1 and away from the side of the water inlet 22 .

Through such a design, the water inlets 22 and the water outlets 11 arranged on different sides can satisfy the uniformity of cooling at each position of the cylinder head 4, and at the same time, the number of the water inlets 22 or the water outlets 11 can be increased according to the actual situation to improve the cooling Water flow efficiency, thereby improving cooling effect.

The present invention also provides a cylinder, as shown in FIG. 4 , comprising a cylinder head 4 and a cylinder block (not shown in the figure), the cylinder head 4 is connected with the above-mentioned double-layer cylinder head water jacket, the cylinder head The bottom surface of the cylinder head 4 is provided with a bottom hole 44 of the cylinder head, and the position of the bottom hole 44 of the cylinder head corresponds to the position of the communication hole 3 .

Through such a design, through the bottom hole 44 of the cylinder head set on the bottom surface of the cylinder head 4, it can be observed whether the communication hole 3 of the upper and lower water jackets 2 has burrs during the casting process. 44 is removed, and at the same time, the sand core water jacket foot can be used as a support foot during the casting process to ensure the fixation of the water jacket sand core, thereby increasing the yield of casting.

The present invention also provides a vehicle using the above cylinder. The cylinder adopts the above-mentioned water jacket to ensure the cooling effect, which is beneficial to ensure the stability and reliability of the vehicle.

The embodiment of the present invention provides a double-layer cylinder head water jacket, a cylinder and a vehicle. By rationally arranging the positions of the communication holes 3 of the upper and lower water jackets 2, the cylinder head 4 can observe the communication holes 3 and remove the communication holes after casting. The burr at the position of the hole 3 improves the casting yield of the cylinder head 4, thereby improving the production efficiency. The drainage structure 23 arranged in the high-heat area can drain the cooling water to the high-heat position to cool the high-heat position. The drainage structure 23 can be a pit structure or a convex structure, and the lower water cavity where the drainage structure 23 is located is limited to be wide on both sides in the middle. The shape of the cooling water allows the cooling water to preferentially flow through the intake and exhaust nose bridge areas 216 located on both sides to achieve the effect of draining cooling water, thereby cooling the intake and exhaust nose bridge areas 216 . The water inlet 22 and the water outlet 11 are respectively arranged on different sides to satisfy the uniformity of the cooling of the cylinder head 4 .

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (6)

1. A cylinder comprising a cylinder head and a cylinder body, wherein the cylinder head is connected with a double-layer cylinder head water jacket; the double-layer cylinder head water jacket comprises an upper-layer water jacket and a lower-layer water jacket, and the upper-layer water jacket is The water jacket and the lower water jacket are stacked on top of each other, the upper water jacket has an upper water cavity for accommodating cooling water and a water outlet for discharging the cooling water from the upper water cavity, and the lower water jacket has a a lower water chamber for accommodating cooling water and a water inlet for introducing cooling water into the lower water chamber, the lower water chamber has a combustion chamber area corresponding to the upper part of the combustion chamber of the cylinder, the combustion chamber area includes an exhaust valve area, which It is characterized in that, a communication hole for connecting the upper water cavity and the lower water cavity is provided between the upper water jacket and the lower water jacket, and the communication hole is located near the exhaust valve area; the The bottom surface of the cylinder head is provided with a bottom hole of the cylinder head, and the bottom hole of the cylinder head corresponds to the position of the communication hole; The combustion chamber area includes two adjacent exhaust valve areas and two adjacent intake valve areas, and the two exhaust valve areas and the two intake valve areas are arranged one above the other; The combustion chamber region includes an intake nose bridge region between adjacent intake valve regions, an exhaust nose bridge region between adjacent exhaust valve regions, and adjacent intake valve and exhaust valve regions. Intake and exhaust nose bridge area between valves; The lower water jacket is provided with a drainage structure, and the drainage structure is used to drain the cooling water so that the cooling water flows through the intake and exhaust nose bridge area; There are a plurality of the combustion chamber regions, a plurality of the flow guiding structures are provided, and there is one combustion chamber region between the adjacent flow guiding structures; The drainage structure is arranged on the top of the lower water jacket, and the two sides are close to the intake and exhaust nose bridge regions corresponding to the two adjacent combustion chamber regions. The drainage structure is relatively deep in the center and the two sides are closer to the two sides. The pit structure with the shallower depth of the nose bridge area of the intake and exhaust; Alternatively, the drainage structure is a convex structure disposed in the lower water cavity, and the convex structure is a convex structure with a relatively high center height and the closer the two sides are to the two sides, the lower the height of the intake and exhaust nose bridge regions. rise. 2 . The cylinder according to claim 1 , wherein the cross section of the dimple structure is V-shaped, trapezoidal or semi-circular. 3 . 3 . The cylinder of claim 1 , wherein the communication hole is provided at the exhaust valve nose bridge region or/and the intake valve nose bridge region. 4 . 4 . The cylinder of claim 3 , wherein a plurality of the communication holes are provided, and there are two exhaust valve regions or two intake valves between two adjacent communication holes. 5 . area. 5. The cylinder of claim 1, wherein the water inlet is arranged on one side of the lower water jacket, and the water outlet is arranged on a side of the upper water jacket away from the water inlet . 6. A vehicle, characterized in that the vehicle has the cylinder according to any one of claims 1 to 5.

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