Cylinder head assembly, engine and vehicle

Abstract

The present application provides a cylinder head assembly, an engine, and a vehicle, wherein the cylinder head assembly includes a cylinder head, the cylinder head being provided with at least two intake ducts and at least two exhaust ducts; the cylinder head including a valve disc conical surface at its bottom, the intake ducts and the exhaust ducts extending to the valve disc conical surface, the valve disc conical surface being used to form an engine combustion chamber together with the inner wall of the cylinder block and the top surface of the piston located within the cylinder block; the portion of the valve disc conical surface located between adjacent intake ducts being provided with an intake squeeze portion, the intake squeeze portion being configured to guide the mixed gas flow entering the combustion chamber from the intake ducts toward the centerline of the cylinder head. The present application can solve the problem of the difficulty of increasing the turbulent kinetic energy by increasing the tumble ratio of the intake duct of the relevant engine, thereby improving the thermal efficiency of the engine, thereby further improving the thermal efficiency of the engine.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle engines, and in particular to a cylinder head assembly, an engine, and a vehicle. Background Art

[0002] Engine thermal efficiency refers to the ratio of the thermal equivalent of an engine's effective power to the heat content of the fuel consumed per unit time. It is used to assess the economic efficiency of an engine as a heat engine. Improving engine thermal efficiency is a key means of conserving energy. Currently, the most direct way to improve engine thermal efficiency is to increase combustion speed, primarily by increasing the turbulent kinetic energy within the engine cylinder at ignition time.

[0003] In related technologies, the tumble ratio of the engine intake duct is usually increased to achieve the improvement of turbulent kinetic energy.

[0004] However, given the valve timing and cylinder head layout structure of the relevant engine, it is difficult to further increase the turbulent kinetic energy by increasing the tumble ratio of the intake duct and thereby improve the engine thermal efficiency. Summary of the Invention

[0005] The present application provides a cylinder head assembly, an engine and a vehicle, which can solve the difficult problem of increasing turbulent kinetic energy by increasing the tumble ratio of the relevant engine intake duct, thereby improving the engine thermal efficiency.

[0006] In a first aspect, the present application provides a cylinder head assembly, comprising a cylinder head, the cylinder head being provided with at least two intake passages and at least two exhaust passages, the cylinder head including a valve disc conical surface at a bottom thereof, the intake passages and the exhaust passages extending to the valve disc conical surface, the valve disc conical surface being used to form a combustion chamber of an engine together with an inner wall of a cylinder block and a top surface of a piston located within the cylinder block;

[0007] An intake squeeze portion is provided on a portion of the conical surface of the valve disc portion located between adjacent intake passages. The intake squeeze portion is configured to guide the mixture flow entering the combustion chamber from the intake passage to flow toward the center line of the cylinder head.

[0008] In the above technical solution, an intake squeeze portion is formed in the portion of the conical surface of the valve disc portion of the cylinder head located between adjacent intake ducts. The intake squeeze portion can guide the direction of the mixture entering the combustion chamber through the intake duct, so that the mixture flow flows toward the center line of the cylinder head, causing the flow of the mixture in the engine cylinder. With the cooperation of the intake duct, it can effectively increase the turbulent kinetic energy in the engine cylinder, increase the combustion speed of the mixture, and thereby improve the thermal efficiency of the engine.

[0009] In combination with the first aspect, in some possible implementations, the air intake squeeze portion includes, from bottom to top, a first air intake squeeze plane, a second air intake squeeze plane, a third air intake squeeze plane, and a fourth air intake squeeze plane;

[0010] The included angles between the first intake squeeze plane, the second intake squeeze plane, the third intake squeeze plane and the fourth intake squeeze plane and the bottom surface of the cylinder head are a1, a2, a3 and a4 respectively, wherein 70°≤a1≤90°, 2a4≤a3≤a1, and 0.5a2≤a4≤2a2.

[0011] In the above technical solution, by setting the angles a1, a2, a3 and a4 between the first intake squeeze plane, the second intake squeeze plane, the third intake squeeze plane and the fourth intake squeeze plane and the bottom surface of the cylinder head within the above-mentioned limited range, the mixture in the engine cylinder is converged toward the center of the cylinder. At the same time, more mixture can be gathered around the electrode of the spark plug, reducing the transmission path of the spark of the spark plug, facilitating the rapid ignition of the mixture, and further improving the engine combustion efficiency.

[0012] In combination with the first aspect and the above implementations, in some possible implementations, the air intake and squeeze portion further includes a transition curved surface;

[0013] Two adjacent air intake and squeeze planes are smoothly connected by the transition curved surface.

[0014] In the above technical solution, by setting a transition surface between two adjacent intake squeeze planes, the mixed gas flow can be guided to flow smoothly through the straight section of the intake squeeze plane, effectively reducing turbulence and reducing the fluidity separation of the mixed gas flow.

[0015] In combination with the first aspect and the above implementation manner, in some possible implementation manners, the transition surface includes:

[0016] a first arc surface, wherein two ends of the first arc surface are respectively connected to the first intake squeeze plane and the second intake squeeze plane, and a concave surface of the first arc surface faces the bottom surface of the cylinder head;

[0017] a second arc surface, wherein two ends of the second arc surface are respectively connected to the second intake squeeze plane and the third intake squeeze plane, and a concave surface of the second arc surface faces away from the bottom surface of the cylinder head;

[0018] The third arc surface has two ends connected to the third intake squeeze plane and the fourth intake squeeze plane respectively, and the concave surface of the third arc surface faces the bottom surface of the cylinder head.

[0019] In combination with the first aspect and the above implementations, in some possible implementations, the radii of the first arc surface, the second arc surface, and the third arc surface are r1, r2, and r3, respectively, where r2=r3≥r1≥2°.

[0020] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the part of the conical surface of the valve disc portion located between adjacent exhaust ducts is provided with an exhaust squeezing surface, and the exhaust squeezing surface is constructed to guide the mixture airflow around the exhaust squeezing portion to flow toward the center line of the cylinder head.

[0021] In the above technical solution, on the basis of the above-mentioned intake squeeze portion, an exhaust squeeze surface is formed on the part of the conical surface of the valve disc portion of the cylinder head located between adjacent exhaust ducts, which can guide the mixture near the exhaust squeeze surface to flow toward the center of the cylinder, further increase the turbulent kinetic energy in the engine cylinder, increase the combustion speed of the mixture, and thus improve the thermal efficiency of the engine.

[0022] In combination with the first aspect and the above implementations, in some possible implementations, the method further includes an intake duct provided on the cylinder head;

[0023] The intake duct is arranged toward the intake passage, and an included angle between a first axis of the intake duct and a center line of the cylinder head is a5, where a5≤20°.

[0024] In the above technical solution, by setting the intake duct toward the intake duct, the conical structure of the valve disc on the bottom surface of the cylinder head can be effectively utilized to guide the flow of the mixture, increase the tumble intensity in the engine cylinder, make full use of the structural characteristics of the valve disc and the intake duct wall, form a stronger intake capacity, and further improve the turbulent kinetic energy in the engine cylinder.

[0025] In combination with the first aspect and the above implementations, in some possible implementations, the system further includes an exhaust conduit and a spark plug disposed on the cylinder head;

[0026] The exhaust conduit is arranged offset toward the exhaust passage, the spark plug extends into the combustion chamber of the cylinder head 1 and is arranged offset toward the intake passage, and the included angles between the second axis of the exhaust conduit and the third axis of the spark plug and the centerline of the cylinder head are a7 and a6, respectively, wherein a5≤a7, 0≤a6≤a5;

[0027] and / or,

[0028] For the included angle a2 between the second intake squeezing plane and the bottom surface of the cylinder head, 0.5a5≤a2≤2a5, and the extended surface of the second intake squeezing plane intersects with the center of the bottom surface of the electrode of the spark plug;

[0029] And / or, the angle between the exhaust extrusion surface and the bottom surface of the cylinder head is a8, a5≤a8≤2a5.

[0030] In the above technical solution, by setting the exhaust duct toward the exhaust duct, the high-temperature exhaust gas in the combustion chamber in the engine cylinder can be discharged smoothly; and by extending the spark plug into the combustion chamber of the cylinder head and setting it toward the intake duct, the electrode center of the spark plug can be within a limited range, effectively ensuring that the spark plug electrode is arranged at a position with higher energy of the mixture flow field in the engine cylinder, which is convenient for the electric spark generated by the spark plug to ignite the mixture with higher energy, facilitate the formation of flame, and promote the flame to spread rapidly to the spark plug, effectively improving the combustion efficiency of the mixture; at the same time, it effectively reduces the distance that the flame is transmitted to the periphery of the combustion chamber, reducing the possibility of detonation; in addition, the extended surface of the second intake extrusion plane is intersected with the bottom center of the spark plug electrode, so that more mixture can be gathered around the spark plug electrode, reducing the transmission path of the spark plug electric spark, facilitating the rapid ignition of the mixture, and further improving the combustion efficiency. On the basis of the angles a1, a2, a3 and a4 between the above-mentioned intake squeeze portion and the bottom surface of the cylinder head, by setting the angle a8 between the exhaust squeeze surface and the bottom surface of the cylinder head in the above-mentioned defined engine cylinder, the smoothness of the flow of the mixture airflow inside the cylinder head combustion chamber can be ensured without affecting the movement law of the mixture airflow in the engine cylinder.

[0031] In a second aspect, the present application also provides an engine comprising any cylinder head assembly described in the first aspect.

[0032] In a third aspect, the present application also provides a vehicle comprising the engine described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a bottom view of a cylinder head assembly provided in an embodiment of the present application;

[0034] Figure 2 yes Figure 1 Sectional view along line AA;

[0035] Figure 3 yes Figure 1 Cross-sectional view along line BB;

[0036] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part I in the middle.

[0037] The description of the reference numerals in the figures is as follows:

[0038] 1—cylinder head; 10—cylinder head centerline;

[0039] 11—intake duct; 111—intake squeeze portion; 1111—first intake squeeze plane; 1112—second intake squeeze plane; 1113—third intake squeeze plane; 1114—fourth intake squeeze plane; 1115—first arc surface; 1116—second arc surface; 1117—third arc surface; 1118—extended surface;

[0040] 12—exhaust duct; 121—exhaust squeeze surface;

[0041] 2—intake duct; 21—first axis;

[0042] 3—exhaust duct; 31—second axis;

[0043] 4—spark plug; 41—electrode; 42—third axis. DETAILED DESCRIPTION

[0044] The following will clearly and thoroughly describe the technical solutions in this application in conjunction with the accompanying drawings. In the description of the embodiments of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more than two.

[0045] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0046] In related technologies, the tumble ratio of the engine intake duct is usually increased to achieve the improvement of turbulent kinetic energy.

[0047] However, given the valve timing and cylinder head layout structure of the relevant engine, it is difficult to further increase the turbulent kinetic energy by increasing the tumble ratio of the intake duct and thereby improve the engine thermal efficiency.

[0048] To solve the above technical problems, the present invention provides a cylinder head assembly, an engine, and a vehicle. The following first introduces a cylinder head assembly provided by the present invention in detail with reference to the accompanying drawings.

[0049] Please refer to Figure 1 , Figure 1 This is a bottom view of a cylinder head assembly provided in an embodiment of the present application.

[0050] First, the first aspect of the present application proposes a cylinder head assembly, comprising a cylinder head 1, wherein the cylinder head 1 comprises a conical surface of a valve disc portion formed into a concave structure at its bottom, and the conical surface of the valve disc portion is used to form the combustion chamber of the engine together with the inner wall of the cylinder block of the engine and the top surface of the piston located in the cylinder block. The cylinder head 1 is provided with an intake duct 11 and an exhaust duct 12, and the bottoms of the intake duct 11 and the exhaust duct 12 both extend to the conical surface of the valve disc portion. In the present application, two intake ducts 11 and two exhaust ducts 12 can be provided, wherein the two intake ducts 11 are located on one side of the conical surface of the valve disc portion, and the two exhaust ducts 12 are located on the other side of the conical surface of the valve disc portion. The mixed gas enters the combustion chamber through the intake duct 11, and the exhaust gas generated after combustion is discharged through the exhaust duct 12.

[0051] The wall surface of the conical surface of the valve disc portion located between adjacent intake passages 11 is formed with an intake squeeze portion 111. The intake squeeze portion 111 is configured to guide the mixture flow entering the combustion chamber from the intake passage 11 toward the cylinder head centerline 10. It should be noted that the cylinder head assembly also includes a spark plug 4 disposed on the cylinder head 1. The cylinder head 1 is also provided with a mounting hole that passes through the conical surface of the valve disc portion, and the spark plug 4 is mounted in the mounting hole. The mounting hole is located between the two intake passages 11 and the two exhaust passages 12. In this application, the cylinder head centerline 10 intersects the axis of the mounting hole at an acute angle.

[0052] In the above technical solution, an intake squeeze portion 111 is formed by forming the portion of the conical surface of the valve disc portion of the cylinder head 1 between the adjacent intake ducts 11. The squeeze portion 111 can guide the direction of the mixture entering the combustion chamber through the intake duct 11, so that the mixture flow flows toward the center line 10 of the cylinder head, causing the flow of the mixture in the engine cylinder. With the cooperation of the intake duct 11, the turbulent kinetic energy in the engine cylinder can be effectively increased, the combustion speed of the mixture can be increased, and the thermal efficiency of the engine can be improved.

[0053] like Figure 3 and Figure 4 As shown, Figure 3 yes Figure 1 Cross-sectional view along line BB; Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part I in the middle.

[0054] In some embodiments of the present application, the air intake squeeze portion 111 includes, from bottom to top, a first air intake squeeze plane 1111, a second air intake squeeze plane 1112, a third air intake squeeze plane 1113, and a fourth air intake squeeze plane 1114;

[0055] The included angles between the first intake squeeze plane 1111, the second intake squeeze plane 1112, the third intake squeeze plane 1113 and the fourth intake squeeze plane 1114 and the bottom surface of the cylinder head 1 are a1, a2, a3 and a4 respectively, wherein 70°≤a1≤90°, 2a4≤a3≤a1, and 0.5a2≤a4≤2a2.

[0056] Among them, the first intake squeeze plane 1111 can guide the mixture around the cylinder to flow toward the center of the cylinder, the second intake squeeze plane 1112 can guide the mixture around the second intake squeeze plane 1112 to flow toward the piston combustion chamber, the third intake squeeze plane 1113 can guide the mixture around the third intake squeeze plane 1113 to flow toward the position of the spark plug 4 in the center of the cylinder, and the fourth intake squeeze plane 1114 can guide the mixture near the fourth intake squeeze plane 1114 to flow toward the center of the cylinder head combustion chamber.

[0057] In the above technical solution, by setting the angles a1, a2, a3 and a4 between the first intake squeeze plane 1111, the second intake squeeze plane 1112, the third intake squeeze plane 1113 and the fourth intake squeeze plane 1114 and the bottom surface of the cylinder head 1 within the above-mentioned limited range, the mixture in the engine cylinder is converged toward the center of the cylinder. At the same time, more mixture can be gathered around the electrode 41 of the spark plug 4, reducing the transmission path of the electric spark of the spark plug 4, facilitating the rapid ignition of the mixture, and further improving the engine combustion efficiency.

[0058] In some embodiments of the present application, the air inlet squeeze portion 111 further includes a transitional curved surface;

[0059] Two adjacent intake and squeeze planes are smoothly connected by a transition curved surface.

[0060] Among them, between two adjacent intake squeeze planes refers to between the first intake squeeze plane 1111 and the second intake squeeze plane 1112, between the second intake squeeze plane 1112 and the third intake squeeze plane 1113, and between the third intake squeeze plane 1113 and the fourth intake squeeze plane 1114.

[0061] It is understood that the transition surface can be a circular arc surface or a composite surface including multiple circular arc surfaces with different curvatures. Figure 4The transition curved surface may include a first arc surface 1115, a second arc surface 1116, and a third arc surface 1117. The first arc surface 1115 has two ends connected to the first intake squeeze plane 1111 and the second intake squeeze plane 1112, respectively, with the concave surface of the first arc surface 1115 facing the bottom surface of the cylinder head 1. The second arc surface 1116 has two ends connected to the second intake squeeze plane 1112 and the third intake squeeze plane 1113, respectively, with the concave surface of the second arc surface 1116 facing away from the bottom surface of the cylinder head 1. The third arc surface 1117 has two ends connected to the third intake squeeze plane 1113 and the fourth intake squeeze plane 1114, respectively, with the concave surface of the third arc surface 1117 facing the bottom surface of the cylinder head 1. In this way, a smooth transition connection between two adjacent intake squeeze planes can be achieved. In addition, to facilitate the production and processing of arc surfaces, when the radii of the first arc surface 1115, the second arc surface 1116 and the third arc surface 1117 are r1, r2 and r3 respectively, the radius of the arc surface can be set to r2=r3≥r1≥2°.

[0062] In the above technical solution, by setting a transition surface between two adjacent intake squeeze planes, the mixed gas flow can be guided to flow smoothly through the straight section of the intake squeeze plane, effectively reducing turbulence and reducing the fluidity separation of the mixed gas flow.

[0063] like Figure 1 As shown, in some embodiments of the present application, the portion of the conical surface of the valve disc portion located between adjacent exhaust passages 12 is provided with an exhaust squeezing surface 121, and the exhaust squeezing surface 121 is constructed to guide the mixture flow around the exhaust squeezing portion toward the center line 10 of the cylinder head.

[0064] In the above technical solution, on the basis of the above-mentioned intake squeeze portion 111, an exhaust squeeze surface 121 is formed on the part of the conical surface of the valve disc portion of the cylinder head 1 located between adjacent exhaust ducts 12, which can guide the mixture near the exhaust squeeze surface 121 to flow toward the center of the cylinder, further increase the turbulent kinetic energy in the engine cylinder, increase the combustion speed of the mixture, and thus improve the thermal efficiency of the engine.

[0065] like Figure 2 As shown, Figure 2 yes Figure 1 Sectional view along line AA.

[0066] In some embodiments of the present application, an intake duct 2 is further included that is arranged on the cylinder head 1 .

[0067] The intake duct 2 is arranged to be biased toward the intake passage 11 , and an angle a5 is formed between a first axis 21 of the intake duct 2 and a center line 10 of the cylinder head, where a5≤20°.

[0068] The intake duct 2 is a basic component of the valve mechanism, and the valve for opening and closing the intake passage 11 is mounted on the intake duct 2 in a manner that allows for telescopic movement along the axis of the intake duct 2 .

[0069] In the above technical solution, by setting the intake duct 2 toward the intake duct 11, the conical surface structure of the valve disc on the bottom surface of the cylinder head 1 can be effectively utilized to guide the flow of the mixture, increase the tumble intensity in the engine cylinder, and make full use of the structural characteristics of the valve disc and the wall of the intake duct 11 to form a stronger intake capacity, thereby further improving the turbulent kinetic energy in the engine cylinder.

[0070] like Figure 2 As shown, in some embodiments of the present application, an exhaust duct 3 and a spark plug 4 are also provided on the cylinder head 1 .

[0071] The exhaust duct 3 is arranged toward the exhaust passage 12, and the spark plug 4 extends into the combustion chamber of the cylinder head 1 and is arranged toward the intake passage 11. The angles between the second axis 31 of the exhaust duct 3 and the third axis 42 of the spark plug 4 and the center line 10 of the cylinder head are a7 and a6 respectively, wherein a5≤a7, 0≤a6≤a5.

[0072] and / or,

[0073] For the included angle a2 between the second intake squeezing plane 1112 and the bottom surface of the cylinder head 1 , 0.5a5≤a2≤2a5, and the extended surface 1118 of the second intake squeezing plane 1112 intersects with the bottom center of the electrode 41 of the spark plug 4 .

[0074] The exhaust duct 3 is also a basic component of the valve train. The valve that opens and closes the exhaust passage 12 is mounted on the exhaust duct 3 so as to be telescopically movable along the axis of the exhaust duct 3. The angle a6 between the third axis 42 of the spark plug 4 and the centerline 10 of the cylinder head can be 10°.

[0075] In the above technical solution, by setting the exhaust duct 3 toward the exhaust passage 12, the high-temperature exhaust gas in the combustion chamber in the engine cylinder can be discharged smoothly; and by extending the spark plug 4 into the combustion chamber of the cylinder head 1 and setting it toward the intake passage 11, the center of the electrode 41 of the spark plug 4 can be within a limited range, effectively ensuring that the electrode 41 of the spark plug 4 is arranged at a position with higher energy of the mixture flow field in the engine cylinder, so that the electric spark generated by the spark plug 4 ignites the mixture with higher energy, facilitates the formation of the flame, and promotes the flame to spread rapidly to the surrounding of the spark plug 4, effectively improving the combustion efficiency of the mixture; at the same time, effectively reduces the distance that the flame is transmitted to the periphery of the combustion chamber, and reduces the possibility of detonation; in addition, the extended surface 1118 of the second intake squeezing plane 1112 is intersected with the bottom center of the electrode 41 of the spark plug 4, so that more mixture can be gathered around the electrode 41 of the spark plug 4, reducing the transmission path of the electric spark of the spark plug 4, facilitating the rapid ignition of the mixture, and further improving the combustion efficiency.

[0076] like Figure 4 As shown, in some embodiments of the present application, the angle between the exhaust squeezing surface 121 and the bottom surface of the cylinder head 1 is a8, and a5≤a8≤2a5.

[0077] In the above technical solution, on the basis of the angles a1, a2, a3 and a4 between the above-mentioned intake squeeze portion 111 and the bottom surface of the cylinder head 1, by setting the angle a8 between the exhaust squeeze surface 121 and the bottom surface of the cylinder head 1 within the above-mentioned limited range, the smoothness of the flow of the mixture airflow inside the cylinder head combustion chamber can be ensured without affecting the movement law of the mixture airflow in the engine cylinder.

[0078] Secondly, the second aspect of the present application also proposes an engine, which is a cylinder head assembly as described in any one of the first aspects.

[0079] The engine provided by the present application has all the beneficial effects of the above-mentioned cylinder head assembly due to the cylinder head assembly of the above-mentioned embodiment. The cylinder head assembly has been described in detail above and will not be repeated here.

[0080] Finally, the third aspect of the present application also proposes a vehicle, which includes the engine of the embodiment of the second aspect mentioned above.

[0081] The vehicle provided in this application has the engine of the above embodiment, and the engine includes the cylinder head assembly of the above embodiment, so it has all the beneficial effects of the above cylinder head assembly. The cylinder head assembly has been described in detail above and will not be repeated here.

[0082] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0083] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A cylinder head assembly, characterized in that: The invention comprises a cylinder head (1), wherein the cylinder head (1) is provided with at least two intake passages (11) and at least two exhaust passages (12), the cylinder head (1) comprises a valve disc conical surface located at the bottom thereof, the intake passages (11) and the exhaust passages (12) extend to the valve disc conical surface, and the valve disc conical surface is used to form a combustion chamber of the engine together with the inner wall of the cylinder body and the top surface of the piston located in the cylinder body; An intake squeeze portion (111) is provided on the portion of the conical surface of the valve disc portion located between adjacent intake passages (11), and the intake squeeze portion (111) is configured to guide the mixed gas flow entering the combustion chamber from the intake passage (11) to flow toward the center line (10) of the cylinder head; The air intake and squeeze portion (111) comprises, from bottom to top, a first air intake and squeeze plane (1111), a second air intake and squeeze plane (1112), a third air intake and squeeze plane (1113), and a fourth air intake and squeeze plane (1114); The included angles between the first intake squeeze plane (1111), the second intake squeeze plane (1112), the third intake squeeze plane (1113) and the fourth intake squeeze plane (1114) and the bottom surface of the cylinder head (1) are a1, a2, a3 and a4, respectively, wherein 70°≤a1≤90°, 2a4≤a3≤a1, and 0.5a2≤a4≤2a2.

2. The cylinder head assembly according to claim 1, wherein: The air intake and squeeze portion (111) further includes a transition curved surface; Two adjacent air intake and squeeze planes are smoothly connected by the transition curved surface.

3. The cylinder head assembly according to claim 2, characterized in that: The transition surface comprises: a first arc surface (1115), wherein two ends of the first arc surface (1115) are respectively connected to the first intake squeezing plane (1111) and the second intake squeezing plane (1112), and the concave surface of the first arc surface (1115) faces the bottom surface of the cylinder head (1); a second arc surface (1116), wherein two ends of the second arc surface (1116) are respectively connected to the second intake squeezing plane (1112) and the third intake squeezing plane (1113), and the concave surface of the second arc surface (1116) faces away from the bottom surface of the cylinder head (1); A third arc surface (1117), wherein both ends of the third arc surface (1117) are respectively connected to the third intake squeezing plane (1113) and the fourth intake squeezing plane (1114), and the concave surface of the third arc surface (1117) faces the bottom surface of the cylinder head (1).

4. The cylinder head assembly according to claim 3, wherein: The radii of the first arc surface (1115), the second arc surface (1116) and the third arc surface (1117) are r1, r2 and r3 respectively, wherein r2=r3≥r1≥2°.

5. The cylinder head assembly according to any one of claims 1 to 4, characterized in that: An exhaust squeeze surface (121) is provided on a portion of the conical surface of the valve disc portion located between adjacent exhaust passages (12). The exhaust squeeze surface (121) is configured to guide the mixed gas flow around the exhaust squeeze portion toward the center line (10) of the cylinder head.

6. The cylinder head assembly according to claim 5, characterized in that: Also included is an intake duct (2) provided on the cylinder head (1); The intake duct (2) is arranged to be biased toward the intake passage (11), and the angle between the first axis (21) of the intake duct (2) and the center line (10) of the cylinder head is a5, and a5≤20°.

7. The cylinder head assembly according to claim 6, characterized in that: It also includes an exhaust conduit (3) and a spark plug (4) arranged on the cylinder head (1); The exhaust conduit (3) is arranged biased toward the exhaust passage (12), the spark plug (4) extends into the combustion chamber of the cylinder head 1 and is arranged biased toward the intake passage (11), and the angles between the second axis (31) of the exhaust conduit (3) and the third axis (42) of the spark plug (4) and the center line (10) of the cylinder head are a7 and a6, respectively, wherein a5≤a7, 0≤a6≤a5; and / or, For the included angle a2 between the second intake squeezing plane (1112) and the bottom surface of the cylinder head (1), 0.5a5≤a2≤2a5, and the extended surface (1118) of the second intake squeezing plane (1112) intersects with the center of the bottom surface of the electrode (41) of the spark plug (4); And / or, the included angle between the exhaust squeezing surface (121) and the bottom surface of the cylinder head (1) is a8, and a5≤a8≤2a5.

8. An engine, characterized in that: Comprising the cylinder head assembly according to any one of claims 1 to 7.

9. A vehicle, characterized in that: Including the engine described in claim 8.

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