CN108894888B - Engine cylinder cover - Google Patents
Engine cylinder cover Download PDFInfo
- Publication number
- CN108894888B CN108894888B CN201810638267.1A CN201810638267A CN108894888B CN 108894888 B CN108894888 B CN 108894888B CN 201810638267 A CN201810638267 A CN 201810638267A CN 108894888 B CN108894888 B CN 108894888B
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- Prior art keywords
- water jacket
- exhaust
- main body
- exhaust side
- water outlet
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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
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
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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
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4264—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels
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- Engineering & Computer Science (AREA)
- 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 an engine cylinder cover. The engine cylinder cover comprises a water inlet, a water outlet, an exhaust port and a plurality of exhaust passages which are arranged corresponding to the plurality of combustion chambers and converged to the exhaust port, exhaust valves are arranged in the exhaust passages, a cooling water jacket is formed between the water inlet and the water outlet, the cooling water jacket comprises a water jacket main body, a lower water jacket led out from the side edge of each combustion chamber of the water jacket main body and an upper water jacket penetrating between the exhaust valves of each combustion chamber and connected with the water jacket main body, the lower water jacket and the upper water jacket cover the lower part and the upper part of each exhaust passage respectively, and hollow areas are arranged on the positions, corresponding to the exhaust passages, of the lower water jacket and the upper water jacket respectively. The engine cylinder cover provided by the invention not only can utilize heat in exhaust to heat the coolant to realize quick warm-up, but also can avoid the problem caused by heat dissipation of a radiator of an engine by the cooling water jacket.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine cylinder cover.
Background
With the increasing environmental protection pressure and the increasing pursuit of users for automobile performance, the mainstream coping technologies of automobile engines are focused on developing miniaturization technology, direct injection technology, supercharging technology, variable intake technology, cylinder head integrated exhaust manifold technology, and the like.
In the prior art, a great part of heat of the engine is taken away by exhaust gas, so that the heat utilization rate is low; when the engine is started, the temperature cannot be rapidly increased, and rapid warm-up is realized, so that the engine cannot achieve the optimal working environment, further the oil consumption of the engine in the starting stage is increased, the exhaust gas is incompletely combusted, and the energy conservation and emission reduction are not facilitated. In order to solve the above problem, in the related art, an exhaust manifold is generally integrated in a cylinder head, and a cooling water jacket is designed in the cylinder head to cool the exhaust manifold so as to heat coolant using heat in exhaust gas, thereby achieving rapid warm-up. However, the cooling water jacket is often designed to be a full wrap exhaust manifold structure, and the cooling water jacket causes problems in heat dissipation of the radiator of the engine and is difficult to manage thermally.
Disclosure of Invention
In order to solve the technical problem, the invention provides an engine cylinder cover which can not only utilize heat in exhaust gas to heat coolant so as to realize quick warm-up, but also can avoid the problem caused by heat dissipation of a radiator of an engine by a cooling water jacket.
The technical scheme of the invention is as follows:
an engine cylinder cover comprises a water inlet, a water outlet, an exhaust port and a plurality of exhaust passages which are arranged corresponding to a plurality of combustion chambers and converged to the exhaust port, exhaust valves are arranged in the exhaust passages, a cooling water jacket is formed between the water inlet and the water outlet and comprises a water jacket main body, a lower water jacket led out from the side edge of each combustion chamber of the water jacket main body and an upper water jacket which penetrates through the exhaust valves of each combustion chamber and is connected with the water jacket main body, the lower water jacket and the upper water jacket respectively cover the lower part and the upper part of each exhaust passage, wherein hollow areas are respectively arranged on the positions of the lower water jacket and the upper water jacket corresponding to the exhaust passages, the exhaust passages are converged to form a converging part, the converging part comprises a first converging part and a second converging part, and the first converging part converges the exhaust passages communicated with each combustion chamber into one, the second converging portion converges the plurality of first converging portions to the exhaust port.
Preferably, the hollowed-out area is at least partially located between the exhaust passages of two adjacent combustion chambers.
Preferably, a crankcase ventilation duct is arranged in the hollow-out area.
Preferably, the water outlet is communicated with one end of the water jacket main body, the water inlet is communicated with the lower water jacket, the water inlet is arranged corresponding to each combustion chamber, four independent flow paths are formed after the cooling liquid of each water inlet enters the lower water jacket, the four independent flow paths are respectively a first flow path flowing along a nose bridge area, two second flow paths flowing along the side walls of the exhaust passage on two sides of the nose bridge area and a third flow path flowing to an exhaust side, the cooling liquid can flow into the water jacket main body along the first flow path and the two second flow paths and then flows into the upper water jacket from the water jacket main body, and the cooling liquid of the upper water jacket and the cooling liquid of the lower water jacket can flow out of the water outlet along the extension direction of the water jacket main body after being converged on the exhaust side.
Preferably, the exhaust side of the upper water jacket and the exhaust side of the lower water jacket do not communicate with each other.
Preferably, the engine cylinder cover further comprises an auxiliary water outlet located on one side of the water outlet, and the auxiliary water outlet is communicated with the exhaust side of the lower water jacket and the exhaust side of the upper water jacket respectively.
Preferably, the cooling water jacket further includes a side water jacket that communicates an exhaust side of the upper water jacket and an exhaust side of the lower water jacket.
Preferably, the side water jacket includes a first communication passage and a second communication passage provided on opposite sides of the exhaust port, respectively, and the first communication passage and the second communication passage communicate an exhaust side of the upper water jacket and an exhaust side of the lower water jacket, respectively.
Preferably, the engine cylinder cover further comprises an auxiliary water outlet positioned on one side of the water outlet, and
the auxiliary water outlet is communicated with at least one of the exhaust side of the lower water jacket and the exhaust side of the upper water jacket.
The engine cylinder cover provided by the embodiment of the invention has the following technical effects: the exhaust manifold is replaced by the exhaust passage which is provided with the exhaust port on the cylinder cover and corresponds to the combustion chambers and is converged to the exhaust port, so that the cylinder cover and the exhaust manifold are integrated, the lower water jacket and the upper water jacket are respectively covered on the lower part and the upper part of each exhaust passage, and the hollow areas are respectively arranged on the positions, corresponding to the exhaust passage, of the lower water jacket and the upper water jacket, so that heat in exhaust can heat coolant to realize quick warming, the compactness and the fuel economy of an engine structure can be improved, and the problem of heat dissipation of a radiator of the engine caused by the cooling water jacket can be avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a perspective view of an engine head of the present invention;
FIG. 2 is a top view of the engine head shown in FIG. 1;
FIG. 3 is a bottom view of the cooling water jacket in the engine head of FIG. 1;
FIG. 4 is a top view of a cooling water jacket in the engine head of FIG. 1;
FIG. 5 is a side view of a cooling water jacket in the engine head of FIG. 1;
FIG. 6 is a schematic illustration of another angle of the cooling jacket in the engine head of FIG. 5;
FIG. 7 is a schematic illustration of a structure of an exhaust passage in the engine head of FIG. 1;
FIG. 8 is a schematic illustration of the combined cooling jacket and exhaust passage configuration of the engine head of FIG. 1;
FIG. 9 is a schematic view of another angle of the combination of the cooling water jacket and the exhaust duct shown in FIG. 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Note that the direction of the arrows in fig. 3 and 4 is the direction in which the coolant flows.
Referring to fig. 1 to 9, the engine cylinder head 100 includes a water inlet 1, a water outlet 2, an exhaust port 3, and a plurality of exhaust passages 4 disposed corresponding to a plurality of combustion chambers and converging to the exhaust port 3, exhaust valves are disposed in the exhaust passages 4, a cooling water jacket 5 is formed between the water inlet 1 and the water outlet 2, the cooling water jacket 5 includes a water jacket main body 51, a lower water jacket 53 led out from the side of each combustion chamber of the water jacket main body 51, and an upper water jacket 55 passing through between the exhaust valves of each combustion chamber and connected to the water jacket main body 51, the lower water jacket 53 and the upper water jacket 55 cover the lower portion and the upper portion of each exhaust passage 4, wherein hollow areas 5a are disposed at positions of the lower water jacket 53 and the upper water jacket 55 corresponding to the exhaust passages 4. In the present embodiment, the hollow-out area 5a is at least partially located between the exhaust passages 4 of two adjacent combustion chambers. The exhaust port 3 and the exhaust passage 4 which corresponds to the combustion chambers and is converged to the exhaust port 3 are arranged on the cylinder cover to replace an exhaust manifold, so that the cylinder cover and the exhaust manifold are integrated, the lower water jacket 53 and the upper water jacket 55 are respectively covered on the lower part and the upper part of the exhaust passage 4, and the hollow areas 5a are respectively arranged at the positions, corresponding to the exhaust passage 4, of the lower water jacket 53 and the upper water jacket 55, so that heat in exhaust can heat coolant to realize quick warm-up, the compactness and the fuel economy of an engine structure can be improved, and the problem of the cooling water jacket on the heat dissipation of a radiator of the engine can be avoided.
In this embodiment, four combustion chambers, namely a first combustion chamber, a second combustion chamber, a third combustion chamber and a fourth combustion chamber, are sequentially arranged along the extending direction of the water jacket main body 1, and each combustion chamber corresponds to two exhaust passages 4, wherein the fourth combustion chamber is close to the water outlet 2.
In the present embodiment, the exhaust passages 4 are converged to form a converging portion 4a, and the converging portion 4a includes a first converging portion 41a and a second converging portion 42a, the first converging portion 41a converging the exhaust passages 4 communicating with the respective combustion chambers into one, and the second converging portion 42a converging the first converging portions 41a to the exhaust port 3.
In this embodiment, the exhaust passages 4 are symmetrically distributed about the exhaust port 3, the intersection of 2 exhaust passages 4 of each combustion chamber is located at the same position, and the cross-sectional areas of the 2 exhaust passages 4 of each combustion chamber after intersection are substantially the same. By symmetrically designing the exhaust passage 4 in combination with the control of the intersection position of the first converging portion 41a and the second converging portion 42a, the uniformity of the exhaust gas flow performance can be controlled.
In the present embodiment, the flow passage cross-sectional area of the exhaust passage 4 gradually increases from the combustion chamber to the exhaust port 3 by 15% to 20%, and the gradual expansion in the height direction is larger than the gradual expansion in the width direction.
In this embodiment, the shape of the exhaust port 3 is a rectangle with rounded corners, so that a high exhaust flow coefficient can be achieved, and good uniformity of flow capacity can be achieved.
In the present exemplary embodiment, a crankcase ventilation duct 6 is provided in the hollow-out region 5 a.
In this embodiment, the water outlet 2 communicates with one end of the water jacket main body 51, the water inlet 1 communicates with the lower water jacket 53, the water inlets 1 are arranged corresponding to each combustion chamber, four independent flow paths are formed after the cooling liquid of each water inlet 1 enters the lower water jacket 53, namely a first flow path flowing along a nose bridge region 57, two second flow paths flowing along the side walls of the exhaust passage 4 at two sides of the nose bridge region 57 and a third flow path flowing to the exhaust side, the cooling liquid can flow into the water jacket main body 51 along the first flow path and the two second flow paths, then flows into the upper water jacket 55 from the water jacket main body 51 and flows to the exhaust side of the upper water jacket 55, and the coolant of the upper water jacket 55 and the lower water jacket 53 can flow out from the water outlet 2 in the extending direction of the water jacket main body 51 after being collected at the exhaust side.
In the present embodiment, the cooling water jacket 5 further includes a side water jacket 57 that communicates the exhaust side of the upper water jacket 55 with the exhaust side of the lower water jacket 53, the side water jacket 57 includes a first communication passage 571 and a second communication passage 573 provided on the opposite sides of the exhaust port 3, respectively, and the first communication passage 571 and the second communication passage 573 communicate the exhaust side of the upper water jacket 55 with the exhaust side of the lower water jacket 53, respectively, so that the coolant can flow from the third flow passage of the lower water jacket 53 into the exhaust side of the upper water jacket 55. In the present embodiment, the side water jacket 57 may further include a third communication passage 575 provided at a distance from the first communication passage 571 and communicating the exhaust side of the upper water jacket 55 and the exhaust side of the lower water jacket 53, and a fourth communication passage 577 provided at a distance from the second communication passage 573 and communicating the exhaust side of the upper water jacket 55 and the exhaust side of the lower water jacket 53.
It is understood that, in other embodiments, the cooling water jacket 5 may not include the side water jacket 57, and the exhaust side of the upper water jacket 55 and the exhaust side of the lower water jacket 53 do not communicate with each other.
In this embodiment, the engine head 100 further includes an auxiliary water outlet 7 located on one side of the water outlet 2.
When the exhaust side of the upper water jacket 55 and the exhaust side of the lower water jacket 53 are provided so as not to communicate with each other, the auxiliary water outlets 7 communicate with the exhaust side of the lower water jacket 53 and the exhaust side of the upper water jacket 55, respectively; when the exhaust side of the upper water jacket 55 and the exhaust side of the lower water jacket 53 are provided so as to communicate with each other through the side water jacket 57, the auxiliary water outlet 7 communicates with at least one of the exhaust side of the lower water jacket 53 and the exhaust side of the upper water jacket 55. The auxiliary water outlet 7 can prevent the gas in the cooling water jacket 5 from being discharged during the running process of the engine, thereby causing cavitation.
In this embodiment, a blocking member 59 for adjusting the flow direction and the flow speed of the cooling liquid is further provided in the third flow path. Wherein the blocking member 59 is provided in the third flow path corresponding to the fourth combustion chamber, and the blocking member 59 is provided in the third flow path corresponding to at least one of the second combustion chamber and the third combustion chamber. In the embodiment shown in fig. 3, the blocking member 59 is provided in the third flow path corresponding to the second combustion chamber and the fourth combustion chamber.
In this embodiment, the engine head 100 further includes a plurality of ribs 8 disposed around the exhaust port 3, and the ribs 8 ensure the strength of the cooling water jacket 5 and the exhaust passage 4. In the embodiment shown in fig. 1, the reinforcing ribs 8 are cylindrical, four reinforcing ribs are provided, the exhaust port 3 is taken as a symmetry center, and the four reinforcing ribs 8 are arranged in a central symmetry manner.
The engine cylinder cover provided by the embodiment at least has the following technical effects: the exhaust port 3 and the exhaust passage 4 which corresponds to the combustion chambers and is converged to the exhaust port 3 are arranged on the cylinder cover to replace an exhaust manifold, so that the cylinder cover and the exhaust manifold are integrated, the lower water jacket 53 and the upper water jacket 55 are respectively covered on the lower part and the upper part of the exhaust passage 4, and the hollow areas 5a are respectively arranged at the positions, corresponding to the exhaust passage 4, of the lower water jacket 53 and the upper water jacket 55, so that heat in exhaust can heat coolant to realize quick warm-up, the compactness and the fuel economy of an engine structure can be improved, and the problem of the cooling water jacket on the heat dissipation of a radiator of the engine can be avoided.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. An engine cylinder cover is characterized by comprising a water inlet, a water outlet, an exhaust port and a plurality of exhaust passages which are arranged corresponding to a plurality of combustion chambers and converged to the exhaust port, exhaust valves are arranged in the exhaust passages, a cooling water jacket is formed between the water inlet and the water outlet and comprises a water jacket main body, a lower water jacket which is led out from the side edge of each combustion chamber of the water jacket main body and an upper water jacket which passes through the exhaust valves of each combustion chamber and is connected with the water jacket main body, the lower water jacket and the upper water jacket respectively cover the lower part and the upper part of each exhaust passage, wherein hollow areas are respectively arranged on the positions of the lower water jacket and the upper water jacket corresponding to the exhaust passages, the exhaust passages are converged to form a converging part, the converging part comprises a first converging part and a second converging part, and the first converging part converges the exhaust passages communicated with each combustion chamber into one, the second converging portion converges the plurality of first converging portions to the exhaust port.
2. The engine head of claim 1, wherein the hollowed-out area is located at least partially between the exhaust passages of two adjacent combustion chambers.
3. The engine head of claim 1, wherein a crankcase ventilation duct is provided within the hollowed-out area.
4. The engine head as claimed in any one of claims 1 to 3, the water outlet is communicated with one end of the water jacket main body, the water inlet is communicated with the lower water jacket, the water inlets are arranged corresponding to each combustion chamber, the cooling liquid of each water inlet forms four independent flow paths after entering the lower water jacket, the four independent flow paths are respectively a first flow path flowing along a nose bridge area, two second flow paths flowing along the side walls of the exhaust passage at two sides of the nose bridge area and a third flow path flowing to an exhaust side, the cooling liquid can flow into the water jacket main body along the first flow path and the two second flow paths and then flows into the upper water jacket from the water jacket main body, and the cooling liquid of the upper water jacket and the lower water jacket can flow out from the water outlet along the extension direction of the water jacket main body after being gathered at the exhaust side.
5. The engine head as set forth in claim 4 wherein the exhaust side of the upper water jacket and the exhaust side of the lower water jacket do not communicate with each other.
6. The engine head as claimed in claim 5, further comprising an auxiliary water outlet on one side of said water outlet, said auxiliary water outlet communicating with the exhaust side of said lower water jacket and the exhaust side of said upper water jacket, respectively.
7. The engine head as set forth in claim 4 wherein said cooling water jacket further includes a side water jacket communicating between an exhaust side of said upper water jacket and an exhaust side of said lower water jacket.
8. The engine head according to claim 7, characterized in that the side water jacket includes a first communication passage and a second communication passage provided on opposite sides of the exhaust port, respectively, the first communication passage and the second communication passage communicating an exhaust side of the upper water jacket and an exhaust side of the lower water jacket, respectively.
9. The engine head as claimed in claim 7, further comprising an auxiliary water outlet on a side of said water outlet, said auxiliary water outlet communicating with at least one of an exhaust side of said lower water jacket and an exhaust side of said upper water jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638267.1A CN108894888B (en) | 2018-06-20 | 2018-06-20 | Engine cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638267.1A CN108894888B (en) | 2018-06-20 | 2018-06-20 | Engine cylinder cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108894888A CN108894888A (en) | 2018-11-27 |
| CN108894888B true CN108894888B (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810638267.1A Active CN108894888B (en) | 2018-06-20 | 2018-06-20 | Engine cylinder cover |
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| CN (1) | CN108894888B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098873A (en) * | 2018-07-25 | 2018-12-28 | 浙江吉利控股集团有限公司 | Engine cylinder cover |
| CN109356743A (en) * | 2018-12-12 | 2019-02-19 | 中国北方发动机研究所(天津) | A kind of cylinder cap on integrated exhaust duct road |
| CN111852682B (en) * | 2020-06-04 | 2022-04-05 | 浙江义利汽车零部件有限公司 | Engine cooling water jacket system, engine cooling method and vehicle |
| CN114991983A (en) * | 2021-03-01 | 2022-09-02 | 比亚迪股份有限公司 | Engine and vehicle |
| CN114439640A (en) * | 2022-01-05 | 2022-05-06 | 东风柳州汽车有限公司 | Engine cylinder cover and cylinder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201635858U (en) * | 2010-03-25 | 2010-11-17 | 广西玉柴机器股份有限公司 | Four-cylinder diesel engine cylinder cover water jacket |
| CN106224079A (en) * | 2016-09-30 | 2016-12-14 | 奇瑞汽车股份有限公司 | A kind of cylinder cover of automobile engine |
| CN207634196U (en) * | 2017-11-01 | 2018-07-20 | 宁波吉利罗佑发动机零部件有限公司 | Cylinder head water jacket |
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- 2018-06-20 CN CN201810638267.1A patent/CN108894888B/en active Active
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| CN108894888A (en) | 2018-11-27 |
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Address after: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Applicant after: Zhejiang Geely Holding Group Co., Ltd. Applicant after: Zhejiang Geely Power Assembly Co., Ltd. Address before: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Applicant before: Zhejiang Geely Holding Group Co., Ltd. Applicant before: Zhejiang Geely Luoyou Engine Co., Ltd. |
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