Engines and vehicles

Abstract

The application discloses an engine and a vehicle, the engine comprising: a cylinder body, a cylinder bore being formed in the cylinder body; a piston, the piston being arranged in the cylinder bore, a top of the piston being provided with a piston intake air extrusion surface and a piston exhaust air extrusion surface; a cylinder cover, the cylinder cover being arranged at a top of the cylinder body, the cylinder cover, the cylinder body and the piston jointly defining a combustion chamber, the cylinder cover being provided with an intake valve and an exhaust valve, a bottom of the cylinder cover being provided with a cylinder cover bottom extrusion surface, a cylinder cover side extrusion surface, a cylinder cover intake air extrusion surface and a cylinder cover exhaust air extrusion surface. Thus, by arranging the cylinder cover bottom extrusion surface around an outer periphery of the combustion chamber, the cylinder cover side extrusion surface is located between the intake valve and the exhaust valve, the cylinder cover intake air extrusion surface is located between the intake valve, and the cylinder cover exhaust air extrusion surface is located between the exhaust valve, the cylinder cover intake air extrusion surface corresponds to the piston intake air extrusion surface, and the cylinder cover exhaust air extrusion surface corresponds to the piston exhaust air extrusion surface, the flow of mixed gas in the combustion chamber can be guided, the turbulent kinetic energy of the mixed gas can be improved, and the thermal efficiency of the engine can be improved.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to an engine and a vehicle. Background Technology

[0002] With the development of engine technology, improving engine thermal efficiency has become a goal pursued by all OEMs. The most direct way to improve thermal efficiency is to increase combustion speed, and the mainstream way to increase combustion speed is to increase the turbulent kinetic energy in the cylinder at the moment of ignition. Therefore, improving turbulent kinetic energy has become a difficult problem for all OEMs to overcome.

[0003] In related technologies, conventional methods to improve turbulent kinetic energy include increasing the tumble ratio of the intake manifold and optimizing the combustion chamber. However, under the limited valve train and cylinder head layout, it is difficult to increase the tumble ratio of the intake manifold. Even if it can be increased to the limit, the flow of fresh air to the limit will still be accompanied by intake noise and intake misfire problems, resulting in low reliability. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an engine with a superior combustion chamber structure and higher thermal efficiency.

[0005] The present invention further proposes a vehicle.

[0006] An engine according to an embodiment of the present invention includes: a cylinder block with a cylinder bore formed therein; a piston disposed within the cylinder bore, the piston having an intake extrusion surface and an exhaust extrusion surface at its top; and a cylinder head disposed at the top of the cylinder block. The cylinder head, the cylinder block, and the piston together define a combustion chamber. An intake valve and an exhaust valve are disposed on the cylinder head. A bottom extrusion surface, a side extrusion surface, an intake extrusion surface, and an exhaust extrusion surface are disposed at the bottom of the cylinder head. The bottom extrusion surface surrounds the outer periphery of the combustion chamber. The side extrusion surface is located between the intake valve and the exhaust valve. The intake extrusion surface is located between the intake valves. The exhaust extrusion surface is located between the exhaust valves. The intake extrusion surface corresponds to the piston intake extrusion surface, and the exhaust extrusion surface corresponds to the piston exhaust extrusion surface.

[0007] Therefore, by surrounding the combustion chamber with the cylinder head bottom extrusion surface, the cylinder head side extrusion surface located between the intake and exhaust valves, the cylinder head intake extrusion surface located between the intake valves, and the cylinder head exhaust extrusion surface located between the exhaust valves, with the cylinder head intake extrusion surface corresponding to the piston intake extrusion surface and the cylinder head exhaust extrusion surface corresponding to the piston exhaust extrusion surface, the flow of the gas mixture in the combustion chamber can be guided, the turbulent kinetic energy of the gas mixture can be increased, and the thermal efficiency of the engine can be improved.

[0008] In some embodiments of the present invention, the intake valve and the exhaust valve are inclinedly arranged on the cylinder head, the angle between the centerline of the intake valve and the centerline of the cylinder bore is a1, and the angle between the centerline of the exhaust valve and the centerline of the cylinder bore is a2. a1 and a2 satisfy the relationship: 10°≤a2≤a1<25°.

[0009] In some embodiments of the present invention, a1 satisfies the relationship: 16°≤a1≤20°; and / or a2 satisfies the relationship: 15°≤a2≤18°.

[0010] In some embodiments of the present invention, the included angle between the cylinder head intake extrusion surface and the bottom surface of the cylinder head is b1, and a1 and b1 satisfy the relationship: 0.5a1≤b1≤a1; and / or the included angle between the cylinder head exhaust extrusion surface and the bottom surface of the cylinder head is b2, and a2 and b2 satisfy the relationship: 0.5a2≤b2≤a2.

[0011] In some embodiments of the present invention, b1 satisfies the relationship: 10°≤b1≤15°; and / or b2 satisfies the relationship: 13°≤b2≤17°.

[0012] In some embodiments of the present invention, a spark plug is provided in the middle of the cylinder head, an electrode is provided at the bottom of the spark plug, the electrode is located in the combustion chamber, the distance from the bottom center of the electrode to the bottom surface of the cylinder head is h1, the height of the bottom extrusion surface of the cylinder head is h2, and the angle between the side extrusion surface of the cylinder head and the bottom surface of the cylinder head is a3. h1, h2 and a3 satisfy the following relationship: h2≤h1, b1≤a3≤b2.

[0013] In some embodiments of the present invention, a spark plug is provided in the middle of the cylinder head, an electrode is provided at the bottom of the spark plug, the electrode is located in the combustion chamber, the diameter of the spark plug is d1, the distance between the center line of the spark plug and the center line of the cylinder bore is d2, and the distance from the bottom center of the electrode to the bottom surface of the cylinder head is h1. d1, d2 and h1 satisfy the relationship: d2≤h1<d1.

[0014] In some embodiments of the present invention, the piston has a piston top surface, the angle between the piston inlet extrusion surface and the piston top surface is a4, the angle between the piston exhaust extrusion surface and the piston top surface is a5, and b1, b2, a4 and a5 satisfy the following relationship: a4 = b1, a5 = b2.

[0015] In some embodiments of the present invention, a spark plug is provided in the middle of the cylinder head, an electrode is provided at the bottom of the spark plug, the electrode is located in the combustion chamber, the distance from the bottom center of the electrode to the bottom surface of the cylinder head is h1, the piston has a piston bottom surface at the top, and the distance between the piston bottom surface and the piston top surface is h3, where h1 and h3 satisfy the relationship: h1≤h3.

[0016] A vehicle according to an embodiment of the present invention includes: the engine described above.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of an engine according to an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of the engine along the AA direction according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of the engine along the BB direction according to an embodiment of the present invention;

[0022] Figure 4 yes Figure 3 A schematic diagram of region A in the middle;

[0023] Figure 5 This is a cross-sectional view of an engine along the CC direction according to an embodiment of the present invention;

[0024] Figure 6 yes Figure 5 A schematic diagram of region B in the middle;

[0025] Figure 7 This is a partial schematic diagram of a cylinder head according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of a piston according to an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Engine;

[0029] 10. Cylinder block; 11. Cylinder bore;

[0030] 20. Piston; 21. Piston inlet extrusion surface; 22. Piston exhaust extrusion surface; 23. Piston top surface; 24. Piston bottom surface;

[0031] 30. Cylinder head; 31. Intake valve; 32. Exhaust valve; 33. Bottom extrusion surface of cylinder head; 34. Side extrusion surface of cylinder head; 35. Intake extrusion surface of cylinder head; 36. Exhaust extrusion surface of cylinder head;

[0032] 40. Combustion chamber; 50. Spark plug; 51. Electrode. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0034] The following is for reference. Figures 1-8 An engine 100 according to an embodiment of the present invention is described, which can be applied to a vehicle.

[0035] Combination Figures 1-8 As shown, the engine 100 according to an embodiment of the present invention may mainly include: a cylinder block 10, a piston 20, and a cylinder head 30. A cylinder bore 11 is formed within the cylinder block 10. The piston 20 is disposed within the cylinder bore 11. A piston intake extrusion surface 21 and a piston exhaust extrusion surface 22 are provided on the top of the piston 20. The cylinder head 30 is disposed on the top of the cylinder block 10. The cylinder head 30, the cylinder block 10, and the piston 20 together define a combustion chamber 40. An intake valve 31 and an exhaust valve 32 are provided on the cylinder head 30. A combustion chamber 40 is provided at the bottom of the cylinder head 30. The cylinder head has a bottom extrusion surface 33, a side extrusion surface 34, an intake extrusion surface 35, and an exhaust extrusion surface 36. The bottom extrusion surface 33 is arranged around the outer periphery of the combustion chamber 40. The side extrusion surface 34 is located between the intake valve 31 and the exhaust valve 32. The intake extrusion surface 35 is located between the intake valves 31. The exhaust extrusion surface 36 is located between the exhaust valves 32. The intake extrusion surface 35 corresponds to the piston intake extrusion surface 21, and the exhaust extrusion surface 36 corresponds to the piston exhaust extrusion surface 22.

[0036] Specifically, a cylinder bore 11 is formed inside the cylinder block 10, a piston 20 is disposed inside the cylinder bore 11, and a cylinder head 30 is disposed on the top of the cylinder block 10. An intake valve 31 and an exhaust valve 32 are disposed on the cylinder head 30. The cylinder head 30, the cylinder block 10, and the piston 20 together define the combustion chamber 40. Air can enter the combustion chamber 40 through the intake valve 31. The piston 20 reciprocates, and the fuel injector injects fuel into the combustion chamber 40 to form a mixture with the air. The spark plug 50 disposed inside the combustion chamber 40 can ignite the mixture. The exhaust gas produced by combustion can be discharged through the exhaust valve 32, thereby ensuring the normal operation of the engine 100.

[0037] Furthermore, by providing a cylinder head bottom extrusion surface 33, a cylinder head side extrusion surface 34, a cylinder head intake extrusion surface 35, and a cylinder head exhaust extrusion surface 36 at the bottom of the cylinder head 30, with the cylinder head bottom extrusion surface 33 surrounding the outer periphery of the combustion chamber 40, the cylinder head side extrusion surface 34 located between the intake valve 31 and the exhaust valve 32, the cylinder head intake extrusion surface 35 located between the intake valves 31, and the cylinder head exhaust extrusion surface 36 located between the exhaust valves 32, and by providing a piston intake extrusion surface 21 and a piston exhaust extrusion surface 22 at the top of the piston 20, aligning the cylinder head intake extrusion surface 35 with the piston intake extrusion surface 21, the cylinder head exhaust... The extrusion surface 36 corresponds to the piston exhaust extrusion surface 22. When the piston 20 reciprocates in the cylinder bore 11, the piston intake extrusion surface 21, piston exhaust extrusion surface 22, cylinder head bottom extrusion surface 33, cylinder head side extrusion surface 34, cylinder head intake extrusion surface 35, and cylinder head exhaust extrusion surface 36 can work together on the gas mixture in the combustion chamber 40. This can significantly improve the gas mixture collection effect in the combustion chamber 40, enhance the gas flow between the bottom of the cylinder head 30 and the piston top surface 23, thereby increasing the turbulent kinetic energy in the combustion chamber 40, increasing the combustion speed in the combustion chamber 40, and thus improving the thermal efficiency of the engine 100.

[0038] Therefore, by surrounding the combustion chamber 40 with the cylinder head bottom extrusion surface 33, the cylinder head side extrusion surface 34 located between the intake valve 31 and the exhaust valve 32, the cylinder head intake extrusion surface 35 located between the intake valves 31, and the cylinder head exhaust extrusion surface 36 located between the exhaust valves 32, the cylinder head intake extrusion surface 35 corresponding to the piston intake extrusion surface 21, and the cylinder head exhaust extrusion surface 36 corresponding to the piston exhaust extrusion surface 22, the flow of the gas mixture in the combustion chamber 40 can be guided, the turbulent kinetic energy of the gas mixture can be increased, and the thermal efficiency of the engine 100 can be improved.

[0039] Combination Figure 2 As shown, the intake valve 31 and the exhaust valve 32 are inclined on the cylinder head 30. The angle between the center line of the intake valve 31 and the center line of the cylinder bore 11 is a1, and the angle between the center line of the exhaust valve 32 and the center line of the cylinder bore 11 is a2. a1 and a2 satisfy the relationship: 10°≤a2≤a1<25°. Specifically, the intake valve 31 and exhaust valve 32 are inclined on the cylinder head 30, such that the angle between the centerline of the exhaust valve 32 and the centerline of the cylinder bore 11 is no greater than the angle between the centerline of the intake valve 31 and the centerline of the cylinder bore 11, and both are set within a reasonable range. This makes the angle of the intake valve 31 and exhaust valve 32 inclined on the cylinder head 30 more reasonable. The disc portion of the intake valve 31 and the disc portion of the exhaust valve 32 can form a conical structure, thereby making full use of the conical structure of the disc portion of the intake valve 31 and the exhaust valve 32 to guide the air flow, increase the turbulence intensity in the combustion chamber 40, and thus improve the combustion speed of the engine 100 and improve the thermal efficiency of the engine 100.

[0040] Furthermore, a1 satisfies the relationship: 16°≤a1≤20°, and a2 satisfies the relationship: 15°≤a2≤18°. Specifically, the angle between the centerline of the intake valve 31 and the centerline of the cylinder bore 11, and the angle between the centerline of the exhaust valve 32 and the centerline of the cylinder bore 11 can be further optimized. By setting the angle between the centerline of the intake valve 31 and the centerline of the cylinder bore 11 within a more optimal range, the structural features of the intake valve 31 disc and the intake manifold wall can be fully utilized to form a stronger intake capacity. By setting the angle between the centerline of the exhaust valve 32 and the centerline of the cylinder bore 11 within a more optimal range, the high-temperature exhaust gas in the combustion chamber 40 can be smoothly discharged, thereby improving the intake and exhaust capacity of the engine 100 and further enhancing the working performance of the engine 100.

[0041] Combination Figure 3 and Figure 4 As shown, the angle between the cylinder head intake extrusion surface 35 and the bottom surface of the cylinder head 30 is b1, and a1 and b1 satisfy the relationship: 0.5a1≤b1≤a1. The angle between the cylinder head exhaust extrusion surface 36 and the bottom surface of the cylinder head 30 is b2, and a2 and b2 satisfy the relationship: 0.5a2≤b2≤a2. Specifically, the angle between the centerline of the intake valve 31 and the centerline of the cylinder bore 11, and the angle between the intake extrusion surface 35 of the cylinder head and the bottom surface of the cylinder head 30 can be set within a reasonable range. Similarly, the angle between the centerline of the exhaust valve 32 and the centerline of the cylinder bore 11, and the angle between the exhaust extrusion surface 36 of the cylinder head and the bottom surface of the cylinder head 30 can be set within a reasonable range. This not only ensures the smoothness and stability of the gas-mixed flow in the combustion chamber 40, but also limits the relative position between the bottom surface of the cylinder head 30 and the piston 20, allowing the gas to mix more thoroughly and evenly in the combustion chamber 40. This prevents knocking and improves the reliability of the engine 100.

[0042] Furthermore, b1 satisfies the relation: 10°≤b1≤15°, and b2 satisfies the relation: 13°≤b2≤17°. Specifically, the angles between the cylinder head intake extrusion surface 35 and the bottom surface of the cylinder head 30, and between the cylinder head exhaust extrusion surface 36 and the bottom surface of the cylinder head 30, can be further optimized. By setting the angles between the cylinder head intake extrusion surface 35 and the bottom surface of the cylinder head 30, and between the cylinder head exhaust extrusion surface 36 and the bottom surface of the cylinder head 30, the cylinder head intake extrusion surface 35 and the cylinder head exhaust extrusion surface 36 can be further brought closer to the bottom surface of the cylinder head 30. This allows the gas mixture to converge towards the center of the combustion chamber 40 without affecting the flow of the gas mixture in the cylinder. Furthermore, it allows more gas mixture to gather around the electrode 51 of the spark plug 50 at the center of the combustion chamber 40, shortening the transmission path of the electric spark and enabling the spark to quickly ignite the gas mixture, thereby improving the combustion efficiency of the engine 100.

[0043] Combination Figures 2-6 As shown, a spark plug 50 is disposed in the middle of the cylinder head 30, and an electrode 51 is disposed at the bottom of the spark plug 50. The electrode 51 is located inside the combustion chamber 40. The distance from the center of the bottom of the electrode 51 to the bottom surface of the cylinder head 30 is h1. The height of the bottom extrusion surface 33 of the cylinder head is h2. The angle between the side extrusion surface 34 of the cylinder head and the bottom surface of the cylinder head 30 is a3. h1, h2, and a3 satisfy the following relationships: h2≤h1, b1≤a3≤b2. Specifically, the spark plug 50 is disposed in the middle of the cylinder head 30, perpendicular to the bottom surface of the cylinder head 30. The electrode 51 is disposed at the bottom of the spark plug 50 and is located inside the combustion chamber 40. In this way, the electrode 51 can generate an electric spark, which can ignite the air-fuel mixture in the combustion chamber 40, ensuring the normal operation of the engine 100.

[0044] Furthermore, the height of the cylinder head bottom extrusion surface 33 is set to be no greater than the distance from the bottom center of the electrode 51 to the bottom surface of the cylinder head 30, and the angle between the cylinder head intake extrusion surface 35 and the bottom surface of the cylinder head 30 is set to be no greater than the angle between the cylinder head side extrusion surface 34 and the bottom surface of the cylinder head 30, and the angle between the cylinder head side extrusion surface 34 and the bottom surface of the cylinder head 30 is set to be no greater than the angle between the cylinder head exhaust extrusion surface 36 and the bottom surface of the cylinder head 30. This not only reduces the mixed gas on the cylinder wall 10, prompting more mixed gas to participate in the turbulent flow in the cylinder and improving the thermal efficiency of the engine 100, but also shortens the propagation path of the electric spark generated by the spark plug 50, reducing the possibility of knocking.

[0045] Combination Figure 3 and Figure 4As shown, a spark plug 50 is provided in the middle of the cylinder head 30, and an electrode 51 is provided at the bottom of the spark plug 50. The electrode 51 is located in the combustion chamber 40. The diameter of the spark plug 50 is d1, the distance between the center line of the spark plug 50 and the center line of the cylinder bore 11 is d2, and the distance from the bottom center of the electrode 51 to the bottom surface of the cylinder head 30 is h1. d1, d2 and h1 satisfy the relationship: d2≤h1<d1. Specifically, the spark plug 50 is positioned perpendicular to the bottom surface of the cylinder head 30. By setting the distance between the centerline of the spark plug 50 and the centerline of the cylinder bore 11 to be no greater than the distance from the bottom center of the electrode 51 to the bottom surface of the cylinder head 30, and setting the distance from the bottom center of the electrode 51 to the bottom surface of the cylinder head 30 to be less than the diameter of the spark plug 50, the electrode 51 of the spark plug 50 can be positioned in a reasonable location within the combustion chamber 40. This not only effectively ensures that the electrode 51 is positioned at a location with high energy in the in-cylinder mixture flow field, facilitating the ignition of the high-energy mixture by the electric spark generated by the spark plug 50, thus facilitating spark formation and further promoting the rapid propagation of the spark around the spark plug 50, improving the combustion efficiency of the engine 100, but also makes the distance between the electrode 51 of the spark plug 50 and the inner wall of the cylinder block 10 closer, so that the distance from which the spark is transmitted to the periphery of the combustion chamber 40 is closer, thereby increasing the combustion speed and reducing the possibility of knocking.

[0046] Combination Figure 4 As shown, the piston 20 has a piston top surface 23. The angle between the piston intake extrusion surface 21 and the piston top surface 23 is a4, and the angle between the piston exhaust extrusion surface 22 and the piston top surface 23 is a5. b1, b2, a4, and a5 satisfy the following relationships: a4 = b1, a5 = b2. Specifically, the angle between the piston intake extrusion surface 21 and the piston top surface 23 can be set to be equal to the angle between the cylinder head intake extrusion surface 35 and the bottom surface of the cylinder head 30. Similarly, the angle between the piston exhaust extrusion surface 22 and the piston top surface 23 can be set to be equal to the angle between the cylinder head exhaust extrusion surface 36 and the bottom surface of the cylinder head 30. This way, when the piston 20 reaches top dead center, the piston intake extrusion surface 21 and the cylinder head intake extrusion surface 35 can cooperate with each other, and the piston exhaust extrusion surface 22 and the cylinder head exhaust extrusion surface 36 can cooperate with each other. The gas mixture inside the cylinder block 10 can be squeezed out, causing the gas mixture around the cylinder block 10 to gather at the center of the combustion chamber 40. This not only reduces the residual gas mixture around the cylinder block 10 and encourages more gas mixture to participate in turbulent motion, increasing the turbulent kinetic energy inside the cylinder, but also increases the concentration of gas mixture around the spark plug electrode 51, making it easier for the electric spark generated by the spark plug electrode 51 to quickly ignite the surrounding gas mixture. This, in turn, increases the combustion rate of the engine 100 and improves the thermal efficiency of the engine 100.

[0047] Furthermore, combined Figure 3 and Figure 4As shown, a spark plug 50 is provided in the middle of the cylinder head 30, and an electrode 51 is provided at the bottom of the spark plug 50. The electrode 51 is located in the combustion chamber 40. The distance from the center of the bottom of the electrode 51 to the bottom surface of the cylinder head 30 is h1. The piston 20 has a piston bottom surface 24 at the top. The distance between the piston bottom surface 24 and the piston top surface 23 is h3. h1 and h3 satisfy the relationship: h1≤h3. Specifically, the spark plug 50 is set perpendicular to the bottom surface of the cylinder head 30. The distance from the bottom center of the electrode 51 to the bottom surface of the cylinder head 30 can be set to be no greater than the distance between the bottom surface 24 and the top surface 23 of the piston. In this way, when the piston 20 reaches the top dead center, the distance between the bottom center of the electrode 51 and the lowest point of the piston top surface 23 can be limited within a suitable range. This ensures that the electric spark generated by the electrode 51 of the spark plug 50 is quickly and directly transmitted to the vicinity of the lowest point of the combustion chamber 40, which facilitates the rapid ignition of the high turbulent kinetic energy mixture on the wall of the combustion chamber 40. This further improves the combustion speed and the thermal efficiency of the engine 100.

[0048] The vehicle according to an embodiment of the present invention may mainly include the engine 100 described above. Specifically, by optimizing the structure of the engine 100, the turbulent kinetic energy of the mixed gas in the combustion chamber 40 can be increased, the thermal efficiency of the engine 100 can be improved, and applying the engine 100 to a vehicle can improve the vehicle's efficiency and performance, thereby enhancing the vehicle's economy and product competitiveness.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0051] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An engine, characterized in that, include: Cylinder block, wherein cylinder bores are formed within the cylinder block; A piston is disposed within the cylinder bore, and the top of the piston is provided with a piston inlet extrusion surface and a piston exhaust extrusion surface. A cylinder head is disposed on top of the cylinder block. The cylinder head, the cylinder block, and the piston together define a combustion chamber. An intake valve and an exhaust valve are disposed on the cylinder head. The bottom of the cylinder head is provided with a cylinder head bottom extrusion surface, a cylinder head side extrusion surface, a cylinder head intake extrusion surface, and a cylinder head exhaust extrusion surface. The cylinder head bottom extrusion surface is disposed around the outer periphery of the combustion chamber. The cylinder head side extrusion surface is located between the intake valve and the exhaust valve. The cylinder head intake extrusion surface is located between the intake valves. The cylinder head exhaust extrusion surface is located between the exhaust valves. The cylinder head intake extrusion surface corresponds to the piston intake extrusion surface. The cylinder head exhaust extrusion surface corresponds to the piston exhaust extrusion surface. The intake valve and the exhaust valve are inclinedly arranged on the cylinder head. The angle between the center line of the intake valve and the center line of the cylinder bore is a1, and the angle between the center line of the exhaust valve and the center line of the cylinder bore is a2. a1 and a2 satisfy the relationship: 10°≤a2≤a1<25°. The angle between the cylinder head intake extrusion surface and the bottom surface of the cylinder head is b1, and a1 and b1 satisfy the relationship: 0.5a1≤b1≤a1; and / or the angle between the cylinder head exhaust extrusion surface and the bottom surface of the cylinder head is b2, and a2 and b2 satisfy the relationship: 0.5a2≤b2≤a2.

2. The engine according to claim 1, characterized in that, a1 satisfies the relationship: 16°≤a1≤20°; and / or a2 satisfies the relation: 15°≤a2≤18°.

3. The engine according to claim 1, characterized in that, b1 satisfies the relationship: 10°≤b1≤15°; and / or b2 satisfies the relation: 13°≤b2≤17°.

4. The engine according to claim 1, characterized in that, A spark plug is provided in the middle of the cylinder head, and an electrode is provided at the bottom of the spark plug. The electrode is located in the combustion chamber. The distance from the center of the bottom of the electrode to the bottom surface of the cylinder head is h1. The height of the bottom extrusion surface of the cylinder head is h2. The angle between the side extrusion surface of the cylinder head and the bottom surface of the cylinder head is a3. h1, h2 and a3 satisfy the following relationship: h2≤h1, b1≤a3≤b2.

5. The engine according to claim 1, characterized in that, A spark plug is provided in the middle of the cylinder head, and an electrode is provided at the bottom of the spark plug. The electrode is located in the combustion chamber. The diameter of the spark plug is d1, the distance between the center line of the spark plug and the center line of the cylinder bore is d2, and the distance from the bottom center of the electrode to the bottom surface of the cylinder head is h1. d1, d2 and h1 satisfy the relationship: d2≤h1<d1.

6. The engine according to claim 1, characterized in that, The piston has a piston top surface at its top. The angle between the piston inlet extrusion surface and the piston top surface is a4, and the angle between the piston exhaust extrusion surface and the piston top surface is a5. b1, b2, a4, and a5 satisfy the following relationship: a4=b1, a5=b2.

7. The engine according to claim 6, characterized in that, A spark plug is provided in the middle of the cylinder head, and an electrode is provided at the bottom of the spark plug. The electrode is located in the combustion chamber. The distance from the bottom center of the electrode to the bottom surface of the cylinder head is h1. The piston has a piston bottom surface at the top, and the distance between the piston bottom surface and the piston top surface is h3. h1 and h3 satisfy the relationship: h1≤h3.

8. A vehicle, characterized in that, include: The engine according to any one of claims 1-7.

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