Cylinder cover, engine and vehicle

Abstract

The cylinder cover comprises a cylinder cover body and a combustion chamber shielding part, an air inlet and a combustion chamber are formed in the cylinder cover body, the air inlet is communicated with the combustion chamber, and the combustion chamber shielding part is arranged in the combustion chamber and located on one side of the edge of the air inlet; an arc surface is further formed on the surface of the combustion chamber and connected to the side, away from the air inlet, of the combustion chamber shielding part. The air inlet and the combustion chamber are arranged on the cylinder cover body, the cambered surface is arranged on the surface of the combustion chamber, and the cambered surface is connected with the combustion chamber shielding part on one side of the air inlet, so that air in the air inlet can enter the combustion chamber more stably, the flow field intensity in a cylinder can be improved, and the tumble ratio can be increased; and mixed gas in the engine can be combusted more sufficiently, so that oil consumption and CO generation can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a cylinder head, an engine and a vehicle. Background Art

[0002] At present, the combustion chamber with a shield is suitable for improving the flow field intensity in the cylinder. Since the shield and surrounding structures need to be specially designed, this will increase the design difficulty and the cost of the subsequent machining process. In addition, the air intake stability is poor. When the intake valve is opened, the airflow around the shield is more dispersed, resulting in poor consistency, which in turn leads to incomplete combustion and increased fuel consumption. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a cylinder head, which can improve the smoothness strength in the cylinder and increase the tumble ratio, so that the mixed gas in the engine can be burned more fully, thereby reducing fuel consumption and reducing the generation of CO.

[0004] The utility model further provides an engine.

[0005] The utility model further provides a vehicle.

[0006] According to the cylinder head of the utility model, it includes: a cylinder head body and a combustion chamber shielding portion, the cylinder head body is formed with an air inlet and a combustion chamber, the air inlet is connected to the combustion chamber, and the combustion chamber shielding portion is arranged in the combustion chamber and is located on one side of the edge of the air inlet; wherein the surface of the combustion chamber is also formed with an arc surface, and the arc surface is connected to the side of the combustion chamber shielding portion away from the air inlet.

[0007] According to the cylinder head of the utility model, an air intake port and a combustion chamber are arranged on the cylinder head body, and an arc surface is arranged on the surface of the combustion chamber, and the arc surface is connected to the combustion chamber shielding portion on the air intake port side. Such an arrangement can make the air from the air intake port enter the combustion chamber more stably, thereby improving the flow field intensity in the cylinder and increasing the tumble ratio, and can also make the mixture in the engine burn more completely, thereby reducing fuel consumption and reducing the generation of CO.

[0008] In some examples of the present invention, the distance between the side edge of the combustion chamber shielding portion away from the air inlet and the center of the arc surface is L1, and the distance between the upper surface of the combustion chamber shielding portion and the center of the arc surface is L2, and L1 and L2 satisfy the relationship: 0<(L2-L1)≤3.5mm.

[0009] In some examples of the present invention, the diameter of the arc surface is d1, and d1 satisfies the relationship: 7.5mm≤d1≤8.5mm.

[0010] In some examples of the present invention, a plane perpendicular to the central axis of the air inlet is set as a reference plane, an angle formed by a line connecting two ends of the arc surface and the central axis of the air inlet on the reference plane is α1, an angle formed by a line connecting two ends of the combustion chamber shielding portion and the central axis of the air inlet on the reference plane is α2, and α1 and α2 satisfy the relationship: α1<α2.

[0011] In some examples of the present invention, α1 and α2 satisfy the relationship: 0.4≤α1 / α2≤0.6.

[0012] In some examples of the present invention, the roughness of the combustion chamber shielding portion is Ra, and Ra satisfies the relationship: 0.8≤Ra≤1.6.

[0013] The engine according to the utility model is characterized in that it includes: the cylinder head and cylinder block mentioned above, the cylinder block is arranged below the cylinder head, the cylinder block is formed with a cylinder hole, and at least a part of the space of the cylinder hole constitutes a main combustion chamber connected to the combustion chamber.

[0014] In some examples of the present invention, the diameter of the combustion chamber shielding portion is d2, the diameter of the cylinder hole is d3, and d2 and d3 satisfy the relationship: 0.3≤d2 / d3≤0.4.

[0015] In some examples of the present invention, the angle between the center line of the combustion chamber shielding portion and the center line of the cylinder hole is α3, and α3 satisfies the relationship: 18°≤α3≤20°.

[0016] The vehicle according to the utility model comprises: the engine mentioned above.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a partial structural schematic diagram of a cylinder head according to an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the local structure of the combustion chamber shielding part and the curved surface;

[0021] Figure 3 It is a schematic diagram of the plane design of the combustion chamber shielding part and the curved surface;

[0022] Figure 4 It is a schematic diagram of the angle structure of the combustion chamber shielding part and the curved surface;

[0023] Figure 5 It is a schematic diagram of high tumble flow intensity;

[0024] Figure 6 It is a schematic diagram of low tumble intensity;

[0025] Figure 7 It is a schematic diagram showing the change of tumble intensity according to the change of α1 / α2.

[0026] Reference numerals:

[0027] 1. Cylinder head;

[0028] 2. Cylinder head body; 21. Air intake; 22. Combustion chamber; 3. Combustion chamber shielding part; 4. Arc surface; 5. Cylinder hole. DETAILED DESCRIPTION

[0029] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0030] Reference below Figure 1-Figure 7 A cylinder head 1 according to an embodiment of the present invention is described, and the cylinder head is applied to an engine.

[0031] like Figure 1-Figure 7 As shown, according to the cylinder head of the utility model, it includes: a cylinder head body 2 and a combustion chamber shielding portion 3, the cylinder head body 2 is formed with an air inlet 21 and a combustion chamber 22, the air inlet 21 is connected to the combustion chamber 22, the combustion chamber shielding portion 3 is arranged in the combustion chamber 22 and is located on one side of the edge of the air inlet 21; wherein, the surface of the combustion chamber 22 is also formed with an arc surface 4, and the arc surface 4 is connected to the side of the combustion chamber shielding portion 3 away from the air inlet 21.

[0032] It can be understood that the cylinder head body 2 and the combustion chamber shielding portion 3 constitute the main structure of the cylinder head 1. The cylinder head body 2 is provided with an air intake port 21 and a combustion chamber 22, and the air intake port 21 and the combustion chamber 22 are connected. In this way, when the intake valve arranged at the air intake port 21 opens the air intake port 21, air can enter the combustion chamber 22 through the air intake port 21, so that the fuel and air can be mixed and burned. The combustion chamber shielding portion 3 is located on the combustion chamber 22, and the combustion chamber shielding portion 3 is located at the edge of the air intake port 21. Such an arrangement can make the combustion chamber shielding portion 3 cover and seal the cylinder head body 2, so as to improve the flow field intensity of the combustion chamber 22. The surface of the combustion chamber 22 is set as an arc surface 4, and the arc surface 4 is connected to the side of the combustion chamber 22 shielding away from the air intake port 21. Such an arrangement can improve the stability of air entering the air intake port, thereby improving the flow field intensity and tumble ratio in the cylinder, and thus making the mixture in the engine burn more fully.

[0033] Therefore, by arranging the air intake port 21 and the combustion chamber 22 on the cylinder head body 2, and arranging the arc surface 4 on the surface of the combustion chamber 22, the arc surface 4 is connected to the combustion chamber shielding portion 3 on the side of the air intake port 21. Such an arrangement can make the air from the air intake port enter the combustion chamber more stably, thereby improving the flow field intensity in the cylinder and increasing the tumble ratio, and can also make the mixture in the engine burn more completely, thereby reducing fuel consumption and reducing the generation of CO.

[0034] Among them, Figure 3 As shown, the distance between the edge of one side of the combustion chamber shielding portion 3 away from the air inlet 21 and the center of the arc surface 4 is L1, and the distance between the upper surface of the combustion chamber shielding portion 3 and the center of the arc surface 4 is L2. L1 and L2 satisfy the relationship: 0<(L2-L1)≤3.5mm. That is to say, L1 and L2 must be within a reasonable range, and the difference between L2 and L1 cannot be less than 0. If the difference between L2 and L1 is less than 0, the combustion chamber shielding portion 3 will not be able to cover the cylinder head body 2, resulting in poor intake stability. The difference between L2 and L1 cannot be greater than 3.5 mm. If the difference between L2 and L1 is greater than 3.5 mm, the center of the arc surface 4 will be too far away from the upper surface of the combustion chamber shielding portion 3, resulting in scattered airflow and poor consistency around the combustion chamber shielding portion 3. If the difference between L2 and L1 is within a reasonable range, when the intake valve is opened, the air enters the combustion chamber 22, and the air away from the center of the cylinder head body 2 can enter the combustion chamber 22 to the greatest extent under the action of the combustion chamber shielding portion 3. In this way, the consistency of the shielding height of the combustion chamber shielding portion 3 in the circumferential direction can be ensured, thereby improving the intake stability of the air intake 21.

[0035] Alternatively, if Figure 3 As shown, the diameter of the arc surface 4 is d1, and d1 satisfies the relationship: 7.5mm≤d1≤8.5mm. It can be understood that the diameter of the arc surface 4 must be within a reasonable range, and the diameter of the arc surface 4 cannot be less than 7.5mm. If the diameter of the arc surface 4 is less than 7.5mm, this will cause the area of ​​the arc surface 4 to be too small, thereby affecting the stability of the intake of the air inlet 21. The diameter of the arc surface 4 cannot be greater than 8.5mm. If the diameter of the arc surface 4 is greater than 8.5mm, this will cause the area of ​​the arc surface 4 to be too large, thereby affecting the circumferential direction of the shielding height consistency of the combustion chamber shielding portion 3. If the diameter of the arc surface 4 is within a reasonable range, it can increase the flow field intensity in the cylinder and increase the tumble ratio, thereby making the mixture in the engine burn more fully.

[0036] In addition, if Figure 4As shown, the plane perpendicular to the central axis of the air inlet 21 is set as the reference plane, the angle formed by the lines connecting the two ends of the arc surface 4 and the central axis of the air inlet 21 on the reference plane is α1, and the angle formed by the lines connecting the two ends of the combustion chamber shielding part 3 and the central axis of the air inlet 21 on the reference plane is α2, and α1 and α2 satisfy the relationship: α1<α2. In other words, the plane perpendicular to the central axis of the air inlet 21 is the reference plane, so that α1 and α2 can be determined, and α1 cannot be greater than α2. This setting can improve the tumble intensity, thereby improving the combustion rate of fuel and air in the combustion chamber 22.

[0037] Among them, Figure 4 As shown, α1 and α2 satisfy the relationship: 0.4≤α1 / α2≤0.6. It can be understood that the ratio of α1 and α2 should be within a reasonable range. If the ratio of α1 and α2 is less than 0.4, this will affect the layout structure of the cylinder head body 2 and the combustion chamber 22, which is not conducive to the manufacture and installation of the cylinder head 1. If the ratio of α1 and α2 is greater than 0.6, this will reduce the tumble intensity, thereby reducing the combustion rate of the fuel and air in the combustion chamber 22. If the ratio of α1 and α2 is within a reasonable range, this can increase the tumble intensity, and the tumble intensity increases with the increase of the ratio of α1 and α2, thereby further improving the combustion rate of the fuel and air in the combustion chamber 22. For example, Figure 5 As shown in FIG. 1 , when the ratio of α1 to α2 is within a reasonable range, air enters the cylinder from the air inlet 21, and the air flow passing over the air inlet 21 is relatively strong, thereby increasing the tumble intensity. Figure 6 As shown, when the ratio of α1 and α2 is greater than 0.6, the air flow passing over the air intake port 21 is reduced, resulting in a weakening of the air flow intensity, which in turn reduces the tumble intensity. The increase in tumble intensity can increase the flow field intensity, thereby making the fuel and air in the cylinder burn more fully, thereby reducing fuel consumption and reducing the generation of CO.

[0038] In addition, if Figure 1-Figure 4 As shown, the roughness of the combustion chamber shielding portion 3 is Ra, and Ra satisfies the relationship: 0.8≤Ra≤1.6. In other words, the roughness of the combustion chamber shielding portion 3 must be within a reasonable range. If the roughness of the combustion chamber shielding portion 3 is less than 0.8, this will cause the combustion chamber shielding portion 3 to be at risk of fracturing during installation, thereby reducing the structural strength of the combustion chamber 22 shielding. If the roughness of the combustion chamber shielding portion 3 is greater than 1.6, this will cause the combustion chamber shielding portion 3 to block air from entering the combustion chamber 22, thereby reducing the tumble intensity. If the roughness of the combustion chamber shielding portion 3 is within a reasonable range, such a setting can avoid the risk of fracturing of the combustion chamber shielding portion 3 during installation, and can also make the air enter the combustion chamber 22 through the air inlet 21 more smoothly, so that the fuel and air in the combustion chamber 22 can be burned more fully.

[0039] The engine according to the embodiment of the utility model comprises: the cylinder head 1 and the cylinder block of the above embodiment, the cylinder block is arranged below the cylinder head 1, the cylinder block is formed with a cylinder hole 5, and at least a part of the space of the cylinder hole 5 constitutes a main combustion chamber 22 connected to the combustion chamber 22. It can be understood that the cylinder head 1 is located above the cylinder block, and such an arrangement can make the cylinder head 1 seal the cylinder block, and a part of the cylinder hole 5 and the combustion chamber 22 form the main combustion chamber 22, so that the cylinder head 1 can seal the main combustion chamber 22, thereby improving the combustion rate of fuel and air.

[0040] Among them, Figure 1 As shown, the diameter of the combustion chamber shielding portion 3 is d2, and the diameter of the cylinder hole 5 is d3, and d2 and d3 satisfy the relationship: 0.3≤d2 / d3≤0.4. In other words, the ratio of the diameter of the combustion chamber shielding portion 3 to the diameter of the cylinder hole 5 should be within a reasonable range. If the ratio of the diameter of the combustion chamber shielding portion 3 to the diameter of the cylinder hole 5 is less than 0.3, this will block the efficiency of air entering the combustion chamber 22 through the air intake port 21. If the ratio of the diameter of the combustion chamber shielding portion 3 to the diameter of the cylinder hole 5 is greater than 0.4, this will cause the speed of air passing through the air intake port 21 to be mismatched with the combustion speed, thereby affecting the combustion efficiency of the combustion chamber 22. If the ratio of the diameter of the combustion chamber shielding portion 3 to the diameter of the cylinder hole 5 is within a reasonable range, the efficiency of air entering the combustion chamber 22 can be improved, and the mixture in the engine can be burned more fully.

[0041] In addition, if Figure 1 As shown, the angle between the center line of the combustion chamber shielding portion 3 and the center line of the cylinder bore 5 is α3, and α3 satisfies the relationship: 18°≤α3≤20°. It can be understood that the angle between the center line of the combustion chamber shielding portion 3 and the center line of the cylinder bore 5 should be within a reasonable range. If the angle between the center line of the combustion chamber shielding portion 3 and the center line of the cylinder bore 5 is less than 18°, this will affect the arrangement of the combustion chamber shielding portion 3 and the cylinder bore 5, which is not conducive to the installation of the combustion chamber shielding portion 3 and the cylinder bore 5. If the angle between the center line of the combustion chamber shielding portion 3 and the center line of the cylinder bore 5 is greater than 20°, this will reduce the efficiency of air entering the combustion chamber 22. If the angle between the center line of the combustion chamber shielding portion 3 and the center line of the cylinder bore 5 is within a reasonable range, it will facilitate the arrangement of the combustion chamber shielding portion 3 and the cylinder bore 5, thereby improving the efficiency of air entering the combustion chamber 22.

[0042] The vehicle according to the embodiment of the utility model includes: the engine of the above embodiment, by arranging the air intake port 21 and the combustion chamber 22 on the cylinder head body 2, and the surface of the combustion chamber 22 is provided with a curved surface 4, and the curved surface 4 is connected to the combustion chamber shielding portion 3 on the side of the air intake port 21. Such an arrangement can improve the flow field intensity in the cylinder and increase the tumble ratio, so that the mixture in the engine can burn more completely, thereby reducing fuel consumption and reducing the generation of CO.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0046] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cylinder head, characterized in that: include: A cylinder head body (2), wherein the cylinder head body (2) is formed with an air intake port (21) and a combustion chamber (22), and the air intake port (21) is communicated with the combustion chamber (22); A combustion chamber shielding portion (3), the combustion chamber shielding portion (3) being arranged in the combustion chamber (22) and located on one side of the edge of the air inlet (21); The surface of the combustion chamber is also formed with a curved surface (4), and the curved surface (4) is connected to a side of the combustion chamber shielding portion (3) away from the air inlet (21).

2. The cylinder head according to claim 1, characterized in that: The distance between the edge of one side of the combustion chamber shielding portion (3) away from the air inlet (21) and the center of the arc surface (4) is L1, and the distance between the upper surface of the combustion chamber shielding portion (3) and the center of the arc surface (4) is L2, and L1 and L2 satisfy the relationship: 0<(L2-L1)≤3.5mm.

3. The cylinder head according to claim 1, characterized in that: The diameter of the arc surface (4) is d1, and d1 satisfies the relationship: 7.5mm≤d1≤8.5mm.

4. The cylinder head according to claim 1, characterized in that: A plane perpendicular to the central axis of the air inlet (21) is set as a reference plane, an angle formed by lines connecting the two ends of the arc surface (4) and the central axis of the air inlet (21) on the reference plane is α1, an angle formed by lines connecting the two ends of the combustion chamber shielding portion (3) and the central axis of the air inlet (21) on the reference plane is α2, and α1 and α2 satisfy the relationship: α1<α2.

5. The cylinder head according to claim 4, characterized in that: α1 and α2 satisfy the relationship: 0.4≤α1 / α2≤0.

6.

6. The cylinder head according to claim 1, characterized in that: The roughness of the combustion chamber shielding portion (3) is Ra, and Ra satisfies the relationship: 0.8≤Ra≤1.

6.

7. An engine, characterized in that: include: The cylinder head (1) according to any one of claims 1 to 6; A cylinder body is arranged below the cylinder head, and a cylinder hole (5) is formed in the cylinder body. At least a part of the space of the cylinder hole (5) constitutes a main combustion chamber connected to the combustion chamber (22).

8. The engine according to claim 7, characterized in that The diameter of the combustion chamber shielding portion (3) is d2, the diameter of the cylinder hole (5) is d3, and d2 and d3 satisfy the relationship: 0.3≤d2 / d3≤0.

4.

9. The engine according to claim 7, characterized in that The included angle between the center line of the combustion chamber shielding portion (3) and the center line of the cylinder hole (5) is α3, and α3 satisfies the relationship: 18°≤α3≤20°.

10. A vehicle, characterized in that: include: An engine as claimed in any one of claims 7 to 9.

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