CN114576030A

CN114576030A - Cylinder head cooling water jacket and engine

Info

Publication number: CN114576030A
Application number: CN202210248342.XA
Authority: CN
Inventors: 孟庆宇; 孟繁臣; 刘文剑; 吴世友; 张楠
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-06-03
Anticipated expiration: 2042-03-14
Also published as: CN114576030B

Abstract

The invention belongs to the technical field of engine cooling, and discloses a cylinder cover cooling water jacket and an engine. The cylinder head cooling water jacket comprises a plurality of upper water jackets and a plurality of lower water jackets, and the number of the upper water jackets corresponds to the number of cylinders; one end of the upper water jacket is communicated with a container containing cooling liquid, and the other end of the upper water jacket is provided with a water drainage channel; the cooling liquid can enter the lower water channel from the upper water jacket and cool the nose bridge area of the cylinder; the lower water jackets are arranged above the cylinder cover, one ends of the lower water jackets are communicated with the lower water channels in a one-to-one correspondence mode, and water outlet channels communicated with the cooling channels of the cylinder body are arranged at the other ends of the lower water jackets. The cylinder cover cooling water jacket can improve the cooling effect of the cylinder cover, prolong the service life of the cylinder cover, has a simple structure, is easy to manufacture, and reduces the production and manufacturing cost.

Description

Cylinder head cooling water jacket and engine

Technical Field

The invention relates to the technical field of engine cooling, in particular to a cylinder cover cooling water jacket and an engine.

Background

In the course of engine operation, innings and females need to cool the engine because of the large amount of heat generated by the combustion of fuel. The most common cooling method is to provide a cooling water jacket on the cylinder head to reduce the temperature of the cylinder head and to remove the heat generated during combustion. In order to ensure that the cylinder cover is well cooled in the working process and avoid overheating of the cylinder cover, thereby influencing the economy and the dynamic property of an engine, a water flow channel is required to be integrally cast inside the cylinder cover for circulating and cooling a cooling liquid. When using the coolant liquid to cool off the cylinder at present, adopt the coolant liquid to cool off the cylinder block earlier more, then follow the cylinder block water feeding, go up the cooling mode to the cylinder head through the cylinder head gasket water hole. Because water is sequentially fed to the cylinder cover from the front end to the rear end of the cylinder body, the water flow inevitably causes great difference of water feeding uniformity of each cylinder, and meanwhile, the coolant drops greatly along the way, so that each cylinder cannot be considered, the cylinders are cooled unevenly, the cooling efficiency is low, the thermal load of the cylinder cover is increased, and even cracking faults occur.

Disclosure of Invention

The invention aims to provide a cylinder cover cooling water jacket which can improve the cooling effect of a cylinder cover, prolong the service life of the cylinder cover, has a simple structure, is easy to manufacture and reduces the production and manufacturing cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the cylinder head cooling water jacket comprises a plurality of upper water jackets and a plurality of lower water jackets, and the number of the upper water jackets corresponds to the number of cylinders; one end of the upper water jacket is communicated with a container containing cooling liquid, and the other end of the upper water jacket is provided with a water drainage channel; the cooling liquid can enter the lower water channel from the upper water jacket and cool the nose bridge area of the cylinder; the lower water jackets are arranged above the cylinder cover, one ends of the lower water jackets are communicated with the lower water channels in a one-to-one correspondence mode, and water outlet channels communicated with the cooling channels of the cylinder body are arranged at the other ends of the lower water jackets.

Optionally, the cylinder head cooling jacket further comprises a liquid inlet main channel configured to communicate with a reservoir containing coolant; the main liquid inlet channel is provided with a plurality of liquid inlet branch channels which are communicated with the upper water jackets in a one-to-one correspondence manner.

Optionally, the upper water jacket is provided with a liquid inlet channel, and the liquid inlet channel is in matched insertion connection with the liquid inlet branch channel.

Alternatively, adjacent two upper water jackets communicate with each other.

Alternatively, the inlet passages of two adjacent upper water jackets are communicated with each other.

Optionally, the lower water jacket is provided with a lower water cooling portion communicated with the lower water passage, and the lower water cooling portion is disposed around the spark plug and the injector of the cylinder.

Optionally, the upper water jacket is integrally formed with and communicates with the lower water jacket.

Alternatively, the upper water jacket and the lower water jacket are integrally cast.

Optionally, the water outlet channel is provided with a plurality of water outlet channels, and the plurality of water outlet channels are distributed at intervals along the circumferential direction of the cylinder.

Has the advantages that:

the cylinder head cooling water jacket cools the cylinder block by introducing cooling liquid from an upper water jacket separately arranged on each cylinder, directly cooling a nose bridge area on the cylinder through a lower water channel arranged on the upper water jacket, and then introducing the cooling liquid into the lower water jacket and flowing into a cylinder block cooling channel. The cylinder cover cooling jacket cools the cylinder cover firstly and cools the cylinder body secondly, can improve the cooling uniformity of the cylinder cover, reduce the flowing pressure drop of cooling liquid, improve the heat exchange efficiency, increase the thermal fatigue reliability of the cylinder cover, reduce the cracking risk of the high-heat part of the cylinder cover, and simultaneously has the characteristics of high cooling efficiency, simple structural style and low manufacturing cost.

The invention also provides an engine, wherein a cylinder cover of the engine comprises the cylinder cover cooling water jacket in any scheme; the cylinder cover of the engine can be efficiently cooled, the service life of the engine is prolonged, and the maintenance and use cost of the engine is reduced.

Drawings

FIG. 1 is a schematic illustration of a cylinder head cooling jacket provided in accordance with an embodiment of the present invention;

fig. 2 is a schematic view of an upper water jacket and a lower water jacket provided by an embodiment of the present invention.

In the figure:

100. a main liquid inlet channel; 110. a liquid inlet branch channel;

200. a water jacket is arranged; 210. a water drainage channel; 220. a liquid inlet channel;

300. a lower water jacket; 310. a water outlet channel; 320. a sewage cooling part.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Referring to fig. 1 to 2, the cylinder head cooling water jacket includes a plurality of upper water jackets 200 and a plurality of lower water jackets 300, the number of the upper water jackets 200 corresponding to the number of cylinders (not shown in the drawings); one end of the upper water jacket 200 is communicated with a container (not shown) for containing cooling liquid, and the other end is provided with a lower water channel 210; the coolant can enter the lower water passage 210 from the upper water jacket 200 and cool the nose bridge region (not shown in the figure) of the cylinder; the plurality of lower water jackets 300 are provided above a cylinder head (not shown in the figure), and one ends of the plurality of lower water jackets 300 are in one-to-one correspondence with the plurality of lower water passages 210, and the other ends thereof are provided with water outlet passages 310 communicating with a cylinder block cooling passage (not shown in the figure).

The cylinder head cooling jacket cools the cylinder block by introducing coolant from an upper water jacket 200 provided separately for each cylinder, and directly cooling the bridge area on the cylinder through a lower water passage 210 provided in the upper water jacket 200, and then introducing the coolant into a lower water jacket 300 and flowing into the block cooling passage. The cylinder head cooling water jacket realizes the flowing of cooling liquid from top to bottom, can cool the cylinder head firstly and then cool the cylinder body, improves the cooling uniformity of the cylinder head, reduces the flowing pressure drop of the cooling liquid, improves the heat exchange efficiency, increases the thermal fatigue reliability of the cylinder head, reduces the cracking risk of high-heat parts of the cylinder head, and has the characteristics of high cooling efficiency, simple structural style and low manufacturing cost.

Specifically, the cylinder head cooling jacket further includes a liquid inlet main passage 100, the liquid inlet main passage 100 being configured to communicate with a tank containing a coolant; the main liquid inlet channel 100 is provided with a plurality of liquid inlet branch channels 110, and the plurality of liquid inlet branch channels 110 are communicated with the plurality of upper water jackets 200 in a one-to-one correspondence manner. The cooling liquid is pumped into the liquid inlet main channel 100 after being pressurized by the water pump, enters the corresponding upper water jacket 200 through the liquid inlet branch channel 110, and independently cools the cylinder head corresponding to the upper water jacket 200, so that the cooling efficiency and the cooling uniformity can be improved, the cylinder head is prevented from being damaged due to thermal stress and thermal fatigue, the service life of the cylinder head is prolonged, and the maintenance cost is reduced.

Further, the upper water jacket 200 is provided with a liquid inlet channel 220, and the liquid inlet channel 220 is inserted in the liquid inlet branch channel 110. The upper water jacket 200 and the liquid inlet main channel 100 are communicated with the liquid inlet branch channel 110 through the liquid inlet channel 220 which is matched and spliced with each other, the upper water jacket 200 and the liquid inlet main channel 100 can be respectively cast, the difficulty of production and manufacturing is reduced, the splicing mode is simple to operate, the tightness of connection of the liquid inlet channel 220 and the liquid inlet branch channel 110 is easily realized, and the leakage of cooling liquid is prevented.

As a preferred embodiment, adjacent two upper water jackets 200 communicate with each other. Further, the inlet passages 220 of the adjacent two upper water jackets 200 communicate with each other. The liquid inlet channels 220 of two adjacent upper water jackets 200 are communicated with each other and are communicated with the same liquid inlet branch channel 110, so that the upper water jackets 200 which are communicated with each other can be integrally formed in a casting mode, the cooling efficiency and the cooling uniformity are further improved, the cylinder cover is prevented from being damaged due to thermal stress and thermal fatigue, the service life of the cylinder cover is prolonged, and the maintenance cost is reduced

With continued reference to fig. 2, optionally, the lower jacket 300 is provided with a lower water cooling portion 320 in communication with the lower water passage 210, the lower water cooling portion 320 being disposed around the spark plug and injector of the cylinder. The lower water cooling part 320 can cool the spark plug and the oil injector of the cylinder, the cooling liquid directly impacts the nose bridge area downwards from the lower water channel 210 to cool the nose bridge area, and the lower water cooling part 320 cools the spark plug arranged on the gasoline engine or the oil injector arranged on the diesel engine to cool the whole cylinder cover, so that the cylinder cover is further cooled, and the cooling effect is improved.

Preferably, the upper water jacket 200 is integrally formed with and communicates with the lower water jacket 300. Further, the upper water jacket 200 and the lower water jacket 300 are integrally cast. The cylinder head cooling water jacket manufactured by casting has the advantages of simple process, low cost and easiness in manufacturing, and can realize the cooling mode of firstly cooling the cylinder head from top to bottom and then cooling the cylinder block without any external pipeline. Specifically, the sand cores of the upper water jacket 200 and the lower water jacket 300 are integrally formed, so that the upper water jacket 200 and the lower water jacket 300 are integrally formed and communicated after casting is completed, a subsequent machining process is not needed, the machining process is simplified, and the production and manufacturing cost is reduced.

Specifically, the cross-sectional dimensions of the main liquid inlet channel 100, the branch liquid inlet channel 110, the lower water channel 210, the liquid inlet channel 220, the water outlet channel 310 and the lower water cooling part 320 should be determined by the flow rate and the flow velocity of the coolant required for cooling the nose bridge area of the cylinder head and the cylinder block, so as to meet the cooling requirement of the nose bridge area. The flow rate and the flow velocity of the cooling liquid are adjusted by a water pump communicated with the liquid inlet main channel 100, so that the cooling channel can be filled with the cooling liquid, and the cooling effect is further improved.

Optionally, the water outlet channel 310 is provided in plurality, and the plurality of water outlet channels 310 are distributed at intervals along the circumferential direction of the cylinder. The plurality of water outlet channels 310 can completely lead the cooling liquid after cooling the cylinder head into the cylinder block cooling channel on the periphery of the cylinder block, so that the cylinder block is uniformly cooled, and the cooling effect of the cylinder block is improved.

The embodiment also provides an engine, wherein a cylinder cover of the engine comprises the cylinder cover cooling water jacket in any scheme; the cylinder cover of the engine can be efficiently cooled, the service life of the engine is prolonged, and the maintenance and use cost of the engine is reduced.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cylinder head cooling water jacket, comprising:

a plurality of upper water jackets (200), the number of the upper water jackets (200) corresponding to the number of cylinders; one end of the upper water jacket (200) is communicated with a container for containing cooling liquid, and the other end of the upper water jacket is provided with a lower water channel (210); coolant can enter a lower water channel (210) from the upper water jacket (200) and cool the nose bridge area of the cylinder;

and the lower water jackets (300) are arranged on the cylinder cover, one ends of the lower water jackets (300) are communicated with the lower water channels (210) in a one-to-one correspondence mode, and the other ends of the lower water jackets are provided with water outlet channels (310) communicated with the cylinder block cooling channel.

2. The cylinder head cooling jacket according to claim 1, further comprising an inlet main channel (100), the inlet main channel (100) being configured to communicate with a reservoir containing a cooling liquid; the liquid inlet main channel (100) is provided with a plurality of liquid inlet branch channels (110), and the liquid inlet branch channels (110) are communicated with the upper water jackets (200) in a one-to-one correspondence mode.

3. The cylinder head cooling water jacket according to claim 2, wherein the upper water jacket (200) is provided with an inlet passage (220), and the inlet passage (220) is in fit plug connection with the inlet branch passage (110).

4. The cylinder head cooling water jacket according to claim 3, wherein adjacent two of the upper water jackets (200) communicate with each other.

5. The cylinder head cooling jacket according to claim 4, wherein the inlet passage (220) of two adjacent upper jackets (200) communicate with each other.

6. The cylinder head cooling water jacket according to claim 1, characterized in that a lower water cooling portion (320) communicating with the lower water passage (210) is provided on the lower water jacket (300), the lower water cooling portion (320) being provided around an ignition plug and an injector of the cylinder.

7. The cylinder head cooling jacket according to claim 1, wherein an upper jacket (200) is formed integrally with and communicates with the lower jacket (300).

8. The cylinder head cooling water jacket according to claim 7, wherein the upper water jacket (200) and the lower water jacket (300) are integrally cast.

9. The cylinder head cooling water jacket according to claim 1, wherein the water outlet passage (310) is provided in plurality, and a plurality of water outlet passages (310) are spaced apart in a circumferential direction of the cylinder.

10. An engine characterized in that a cylinder head cooling water jacket according to any one of claims 1 to 9 is incorporated on a cylinder head of the engine.