阅读说明：本技术 一种横流冷却发动机的气缸盖双层水套结构 (Cylinder head double-layer water jacket structure of cross flow cooling engine ) 是由 胡祥宇 王德春 朱继艳 牟红雨 毕鸿戈 于广达 杜紫薇 刘朋 张莹 南昌浩 于 2021-08-13 设计创作，主要内容包括：一种横流冷却发动机的气缸盖双层水套结构,涉及一种气缸盖水套结构。上层水套和下层水套上下叠放固定形成双层结构,后端设有四组燃烧室区域,每组包括火花塞区域、进气门区域和排气门区域,下层水套底面设有四个缸盖上水口和两个水套上水口,上层水套和下层水套之间竖向连通有两个上水机加通道和三个下水机加通道,下层水套底面设有五个缸盖出水口和八个水套出水口,上层水套和下层水套的空腔内分别设有水流引导凸起。针对四缸发动机设计了一种双层水套结构,采用排气侧进水进气侧出水的横流形式,保证冷却均匀性,有效降低热负荷。(A cylinder cover double-layer water jacket structure of a cross flow cooling engine relates to a cylinder cover water jacket structure. The upper-layer water jacket and the lower-layer water jacket are vertically stacked and fixed to form a double-layer structure, four groups of combustion chamber regions are arranged at the rear end of the double-layer water jacket, each group comprises a spark plug region, an intake valve region and an exhaust valve region, four cylinder cover water feeding ports and two water jacket water feeding ports are formed in the bottom surface of the lower-layer water jacket, two water feeding machine feeding channels and three water discharging machine feeding channels are vertically communicated between the upper-layer water jacket and the lower-layer water jacket, five cylinder cover water outlets and eight water jacket water outlets are formed in the bottom surface of the lower-layer water jacket, and water flow guide protrusions are respectively arranged in cavities of the upper-layer water jacket and the lower-layer water jacket. A double-layer water jacket structure is designed for a four-cylinder engine, and a transverse flow mode of water inlet at an exhaust side and water outlet at an air inlet side is adopted, so that the cooling uniformity is ensured, and the heat load is effectively reduced.)

1. A cylinder head double-layer water jacket structure of a cross flow cooling engine is characterized in that: the engine comprises an upper-layer water jacket (1) and a lower-layer water jacket (2), wherein the upper-layer water jacket (1) and the lower-layer water jacket (2) are two independent bodies, cavities for containing cooling water are arranged in the upper-layer water jacket (1) and the lower-layer water jacket (2), the upper-layer water jacket (1) and the lower-layer water jacket (2) are stacked and fixed up and down to form a double-layer structure, four groups of combustion chamber areas matched with a cylinder body of a four-cylinder engine are respectively arranged at the rear ends of the upper-layer water jacket (1) and the lower-layer water jacket (2), each group of combustion chamber area comprises a spark plug area, an intake valve area and an exhaust valve area, a nose bridge area is formed between the spark plug area, four cylinder cover water inlets (8) are correspondingly arranged at the front ends of the four exhaust valve areas adjacent to the bottom surface of the lower-layer water jacket (2), two water jacket water inlets (9) are arranged at two sides of the two exhaust valve areas adjacent to the edge of the bottom surface of the lower-layer water jacket (2), vertical intercommunication has two water dispensers to add passageway (6) and three water dispensers to add passageway (5) between upper water jacket (1) and lower floor's water jacket (2), two water dispensers add passageway (6) and transversely evenly set up in the front end exhaust side, three water dispensers add passageway (5) and transversely evenly set up in the rear end side of admitting air, and two intake valve regional both sides of neighbouring edge are equipped with five cylinder cap delivery ports (10) altogether between the per adjacent two intake valve region in lower floor's water jacket (2) bottom surface, and lower floor's water jacket (2) bottom surface is neighbouring four intake valve regional rear ends and evenly is equipped with eight water jacket delivery ports (11), is equipped with rivers guide arch by the front end exhaust side to the rear end side of admitting air in the cavity of upper water jacket (1) and lower floor's water jacket (2) respectively.

2. A cylinder head double-layered water jacket structure of a cross-flow cooled engine according to claim 1, characterized in that: the upper-layer water jacket (1) and the lower-layer water jacket (2) are manufactured by adopting a sand casting process, a plurality of connecting supports are respectively and integrally arranged on the bottom surface of the upper-layer water jacket (1) and the top surface of the lower-layer water jacket (2), and a gap is reserved between the bottom surface of the upper-layer water jacket (1) and the lower-layer water jacket (2) after the upper-layer water jacket and the lower-layer water jacket are fixedly connected through the connecting supports to form a double-layer structure.

3. A cylinder head double-layered water jacket structure of a cross-flow cooled engine according to claim 2, characterized in that: the front end of the double-layer structure is butted to form two front end plug sheet hole channels (4), the two sides of the double-layer structure are butted to form two side plug sheet hole channels (3), and the front end plug sheet hole channels (4) and the side plug sheet hole channels (3) are used for plugging through plug sheets after sand is discharged.

4. A cylinder head double-layered water jacket structure of a cross-flow cooled engine according to claim 1 or 2, characterized in that: and water replenishing grooves respectively extend forwards and backwards from the positions, corresponding to the water jacket upper water gap (9), of the two sides in the cavity of the lower water jacket (2).

5. A cylinder head double-layered water jacket structure of a cross-flow cooled engine according to claim 4, characterized in that: and the rear end of the upper-layer water jacket (1) is communicated with a small circulating air release channel (7).

Technical Field

The invention relates to a cylinder cover water jacket structure, in particular to a cylinder cover double-layer water jacket structure of a cross flow cooling engine, and belongs to the technical field of engines.

Background

The engine cylinder cover is used as a core part of the engine, mainly has the functions of sealing the upper part of the cylinder, forming a combustion chamber together with the piston and the cylinder, bearing the gas pressure in the cylinder, and generally comprises an air passage and providing mounting positions for parts such as an air valve and the like, so that the normal work of the engine is ensured.

With the stricter requirements on the dynamic property and the fuel economy of the engine, a small-sized strengthened engine combining technologies of high compression ratio, high supercharging, small displacement and the like is produced. Because the strengthening degree of the engine is continuously improved, the heat load of the cylinder cover is gradually increased, the traditional longitudinal flow type water jacket structure is too simple, water inlets and water outlets of the water jacket are respectively arranged at the front end and the rear end of the engine, and the cooling effect on a nose bridge area of the cylinder cover is difficult to meet due to the limitation of the flow form of the water jacket.

Therefore, aiming at the requirement of the heat load of the current cylinder cover, the water jacket structure with stronger cooling performance is required to be developed and designed, so that the cooling effect on the nose bridge area of the cylinder cover is ensured, the heat load is effectively reduced, and the economic efficiency and reliability requirements of an engine are met.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a cylinder cover double-layer water jacket structure of a cross-flow cooling engine, which is designed for a four-cylinder engine, adopts a cross-flow mode of water inlet at an exhaust side and water outlet at an air inlet side, ensures the cooling uniformity and effectively reduces the heat load.

In order to achieve the purpose, the invention adopts the following technical scheme: a cylinder cover double-layer water jacket structure of a transverse flow cooling engine 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 two independent individuals, cavities for containing cooling water are arranged in the upper layer water jacket and the lower layer water jacket, the upper layer water jacket and the lower layer water jacket are stacked and fixed from top to bottom to form a double-layer structure, four groups of combustion chamber areas matched with cylinders of a four-cylinder engine are respectively arranged at the rear ends of the upper layer water jacket and the lower layer water jacket, each group of combustion chamber areas comprise a spark plug area, an intake valve area and an exhaust valve area, a nose bridge area is formed between the spark plug area, the intake valve area and the exhaust valve area, four cylinder cover water inlets are correspondingly arranged at the front ends of the four exhaust valve areas adjacent to the bottom surface of the lower layer water jacket one by one to one, two water jacket water inlets are arranged at the two sides of the two exhaust valve areas adjacent to the edge of the bottom surface of the lower layer water jacket, two water jacket water feeder water feeding channels and three water feeder water feeding channels are vertically communicated between the upper layer water jacket and the lower layer water jacket, the two water feeders and the channels are transversely and uniformly arranged on the front-end exhaust side, the three water feeders and the channels are transversely and uniformly arranged on the rear-end air inlet side, five cylinder cover water outlets are formed between every two adjacent air inlet valve areas of the bottom surface of the lower-layer water jacket and on two sides of the two adjacent air inlet valve areas of the edge, eight water jacket water outlets are uniformly formed in the rear ends of the four adjacent air inlet valve areas of the bottom surface of the lower-layer water jacket, and water flow guide protrusions are respectively formed in cavities of the upper-layer water jacket and the lower-layer water jacket from the front-end exhaust side to the rear-end air inlet side.

Compared with the prior art, the invention has the beneficial effects that: the invention designs a double-layer water jacket structure aiming at a four-cylinder engine, an upper-layer water jacket and a lower-layer water jacket are two independent bodies and are communicated through a machining channel to realize water feeding and discharging, a transverse flow mode of water inlet at an exhaust side and water outlet at an air inlet side is adopted, the arrangement of an upper water port and a water outlet is more reasonable, and compared with the traditional longitudinal flow type water jacket structure, the double-layer water jacket structure has better cooling effect, water flow guide bulges are arranged in cavities of the upper-layer water jacket and the lower-layer water jacket, so that cooling water is uniformly distributed to parts needing cooling at all positions, the cooling uniformity is ensured, the heat load is effectively reduced, the structure is reasonable and efficient, and the double-layer water jacket structure has good popularization value.

Drawings

FIG. 1 is a front view of a cylinder head double-layered water jacket structure of a cross-flow cooled engine of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a bottom view of the lower water jacket of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a bottom view of the upper water jacket of the present invention;

fig. 6 is a top view of fig. 5.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying 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 invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in fig. 1 to 2, a cylinder head double-layer water jacket structure of a cross-flow cooling engine comprises an upper layer water jacket 1 and a lower layer water jacket 2, wherein the upper layer water jacket 1 and the lower layer water jacket 2 are two separate bodies, cavities for containing cooling water are arranged in the upper layer water jacket 1 and the lower layer water jacket 2, and the upper layer water jacket 1 and the lower layer water jacket 2 are vertically stacked and fixed to form a double-layer structure.

Furthermore, the upper-layer water jacket 1 and the lower-layer water jacket 2 are manufactured by adopting a sand casting process, the bottom surface of the upper-layer water jacket 1 and the top surface of the lower-layer water jacket 2 are respectively and integrally provided with a plurality of connecting supports, and the bottom surface of the upper-layer water jacket 1 and the lower-layer water jacket 2 are fixedly connected through the connecting supports to form a double-layer structure, so that a gap is reserved between the upper-layer water jacket 1 and the lower-layer water jacket 2, therefore, on one hand, the sand discharge is facilitated, and on the other hand, the heat dissipation of the upper-layer water jacket 1 and the lower-layer water jacket 2 is facilitated by the gap region. The front end of the double-layer structure is butted to form two front end plug sheet hole channels 4, the two sides of the double-layer structure are butted to form two side plug sheet hole channels 3, the opening positions of the front end plug sheet hole channels 4 and the side plug sheet hole channels 3 are larger than a spacing distance, sand discharging after sand casting is facilitated, and plugging can be achieved through the plug sheets after sand discharging.

Two water feeding machine adding channels 6 and three water discharging machine adding channels 5 are vertically communicated between the upper water jacket 1 and the lower water jacket 2, the two water feeding machine adding channels 6 are transversely and uniformly arranged on the front end exhaust side, and the three water discharging machine adding channels 5 are transversely and uniformly arranged on the rear end air inlet side.

In addition, the rear end of the upper water jacket 1 is preferably provided with a small circulation air release channel 7 in a communication mode, and the small circulation air release channel 7 is connected with the water tank to help discharge air in the cooling water.

Referring to fig. 3 to 6, the rear ends of the upper water jacket 1 and the lower water jacket 2 are respectively provided with four groups of combustion chamber areas matched with a cylinder body of a four-cylinder engine, each group of combustion chamber areas comprises a spark plug area, an intake valve area and an exhaust valve area, and a nose bridge area is formed among the spark plug area, the intake valve area and the exhaust valve area.

Referring to fig. 3, four cylinder cover water inlets 8 are correspondingly arranged on the bottom surface of the lower water jacket 2 adjacent to the front ends of four exhaust valve regions one by one, two water jacket water inlets 9 are arranged on two sides of two exhaust valve regions on the bottom surface of the lower water jacket 2 adjacent to the edge, five cylinder cover water outlets 10 are arranged between every two adjacent intake valve regions on the bottom surface of the lower water jacket 2 and on two sides of two intake valve regions adjacent to the edge, and eight water jacket water outlets 11 are uniformly arranged on the bottom surface of the lower water jacket 2 adjacent to the rear ends of the four intake valve regions.

Furthermore, water replenishing grooves are respectively formed in the two sides in the cavity of the lower-layer water jacket 2 and in the positions corresponding to the water jacket water feeding ports 9 in a forward and backward extending mode, and water flow in the front and the back of a cylinder cover is supplemented.

As shown in fig. 3 to 6, water flow guiding protrusions are respectively arranged in the cavities of the upper-layer water jacket 1 and the lower-layer water jacket 2 from the front end exhaust side to the rear end intake side, so that cooling water is uniformly distributed to the parts to be cooled, and the cooling uniformity is ensured.

In the working state, cooling water flows into the lower-layer water jacket 2 from the exhaust side through a cylinder cover water feeding port 8 and a water jacket water feeding port 9, wherein the cylinder cover water feeding port 8 is mainly responsible for water feeding, the water jacket water feeding port 9 is responsible for complementing water flow in front of and behind a cylinder cover, one part of the cooling water entering the lower-layer water jacket 2 enters the upper-layer water jacket 1 through a water feeding machine feeding channel 6 on the exhaust side, the other part of the cooling water directly flows to the cooling combustion chamber area on the air inlet side, the cooling water of the upper-layer water jacket 1 flows back to be converged with the cooling water in the lower-layer water jacket 2 through a water discharging machine feeding channel 5 on the air inlet side, and then flows back to the cylinder body through a cylinder cover water outlet 10 on the air inlet side and a water jacket water outlet 11.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.