Cylinder head assembly and engine

Abstract

The application provides a cylinder head assembly and an engine, which comprises: a cylinder head in which a cylinder head intake passage is formed; a cylinder head cover in which a cylinder head cover intake passage is formed, and an oil-gas separator in which a small load passage is formed, and the cylinder head cover intake passage is communicated with the small load passage; wherein the cylinder head is provided with a plurality of intake ports, the cylinder head intake passage comprises a cylinder head main passage and a plurality of cylinder head third passages, the cylinder head main passage is communicated between the cylinder head cover intake passage and the plurality of cylinder head third passages, the plurality of cylinder head third passages are respectively communicated with the plurality of intake ports one by one, and the inner diameter of the small load passage is greater than or equal to the inner diameter of the cylinder head third passage. The cylinder head assembly of the embodiment of the application can improve the integration degree, is convenient for the arrangement of the cylinder head assembly, can reduce the manufacturing cost of the cylinder head assembly, can improve the airflow flow, can ensure the uniformity of the distribution of airflow to each intake port, can ensure the consistency of the combustion efficiency between cylinders, and can improve the smoothness of the power output of the engine and the fuel economy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle manufacturing, in particular to a cylinder head assembly and an engine with the same. BACKGROUND

[0002] With the development of national economy and the continuous improvement of people's living standards, vehicles are becoming more and more important in life travel, and the stability of vehicle performance when running is a problem that needs to be considered when producing and manufacturing vehicles. The existing vehicles are all provided with engines to provide running power for the vehicles. The engine generates oil gas when running, in order to ensure the economy of engine operation and improve the emission, the oil droplets in the oil gas need to be separated by an oil-gas separator.

[0003] However, when the engine is in a small load condition, the engine speed is low, the separated airflow is weak, and the airflow flow channel of the existing crankcase is easy to cause uneven distribution of airflow when distributing to the intake ports of each cylinder, thereby causing poor airflow and uneven pressure in some areas of the cylinder, resulting in differences in combustion efficiency of the cylinder, affecting the power output smoothness and fuel economy of the entire engine, and there is room for improvement. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a cylinder head assembly, which is simple in structure, high in integration, facilitates the arrangement of the cylinder head assembly, can reduce the manufacturing cost, and can ensure the consistency of the combustion efficiency between the cylinders, improve the smoothness of the engine power output and the fuel economy.

[0005] The cylinder head assembly according to the embodiment of the present application comprises: a cylinder head, an intake passage of the cylinder head is formed in the cylinder head; a cylinder head cover and an oil-gas separator, the cylinder head cover is connected to the upper part of the cylinder head, the oil-gas separator is connected to the upper part of the cylinder head cover, an intake passage of the cylinder head cover is formed in the cylinder head cover, a small load passage is formed in the oil-gas separator, and the intake passage of the cylinder head cover is communicated with the small load passage; wherein the cylinder head is provided with a plurality of intake ports, the intake passage of the cylinder head comprises a main passage of the cylinder head and a plurality of third passages of the cylinder head, the main passage of the cylinder head is communicated between the intake passage of the cylinder head cover and the plurality of third passages of the cylinder head, the plurality of third passages of the cylinder head are respectively communicated with the plurality of intake ports one by one, and the inner diameter of the small load passage is greater than or equal to the inner diameter of the third passage of the cylinder head.

[0006] According to the cylinder head assembly provided by the embodiment of the present application, the small load channel, the cylinder head cover intake channel and the cylinder head intake channel are integrated in the cylinder head assembly, so that the structure of the cylinder head assembly is simplified, the integration degree is improved, the arrangement of the cylinder head assembly is facilitated, the manufacturing cost of the cylinder head assembly is reduced, the inner diameter of the small load channel is greater than or equal to the inner diameter of the cylinder head third channel, the airflow flow is improved, the uniformity of the airflow distribution to each intake port is ensured, the consistency of the combustion efficiency between the cylinders is ensured, the smoothness of the engine power output and the fuel economy are improved, the use effect is better, and the application range is wider.

[0007] According to the cylinder head assembly provided by some embodiments of the present application, the inner diameter of the cylinder head third channel is d1, and the following condition is met: 1mm≤d1≤5mm.

[0008] According to the cylinder head assembly provided by some embodiments of the present application, the cylinder head main channel comprises the cylinder head first channel and the cylinder head second channel which are communicated, the cylinder head first channel is communicated with the cylinder head cover intake channel, and the plurality of cylinder head third channels are communicated with the cylinder head second channel along the length direction of the cylinder head second channel.

[0009] According to the cylinder head assembly provided by some embodiments of the present application, the distance from the outlet end of the cylinder head first channel to one end of the cylinder head second channel is d2, the distance from the outlet end of the cylinder head first channel to the other end of the cylinder head second channel is d3, the width of the intake port along the length direction of the cylinder head second channel is d4, and the following condition is met: |d2-d3|≤d4.

[0010] According to the cylinder head assembly provided by some embodiments of the present application, the length direction of the cylinder head first channel is perpendicular to the length direction of the cylinder head second channel.

[0011] According to the cylinder head assembly provided by some embodiments of the present application, the length direction of the cylinder head third channel is perpendicular to the length direction of the cylinder head second channel.

[0012] According to the cylinder head assembly provided by some embodiments of the present application, the distance between the axis of the cylinder head third channel and the center surface of the corresponding intake port is d5, the distance between the center surface of the intake valve of the intake port and the center surface of the corresponding cylinder is d6, and the following condition is met: |d5-d6|≤d6.

[0013] According to the cylinder head assembly provided by some embodiments of the present application, the angle between the axis of the intake port and the axis of the cylinder head third channel is a1, and the following condition is met: a1<90°.

[0014] According to the cylinder head assembly provided by some embodiments of the present application, the cylinder head assembly further comprises an intake manifold, the intake manifold is provided with a manifold intake port and a manifold inner cavity, the plurality of intake ports are communicated with the manifold inner cavity, and the manifold intake port is communicated with the manifold inner cavity.

[0015] The manifold air inlet is located at one end of the manifold inner cavity, and the communication position of each cylinder head third passage with the corresponding intake port is located on the side of the cylinder center plane of the intake port away from the manifold air inlet.

[0016] According to the cylinder head assembly of some embodiments of the present application, the cylinder head cover intake passage comprises a cylinder head cover first passage, a cylinder head cover second passage, a cylinder head cover third passage and a cylinder head cover fourth passage which are sequentially communicated, the length direction of any two adjacent ones of the cylinder head cover first passage, the cylinder head cover second passage, the cylinder head cover third passage and the cylinder head cover fourth passage forms an included angle, the cylinder head cover first passage is communicated with the small load passage, and the cylinder head cover fourth passage is communicated with the cylinder head main passage.

[0017] According to the cylinder head assembly of some embodiments of the present application, the inner diameter of the cylinder head cover first passage, the inner diameter of the cylinder head cover second passage, the inner diameter of the cylinder head cover third passage and the inner diameter of the cylinder head cover fourth passage are all configured to be greater than or equal to the inner diameter of the small load passage.

[0018] The present application also proposes an engine.

[0019] According to the engine of the embodiments of the present application, the engine comprises the cylinder head assembly of any one of the above.

[0020] The engine and the cylinder head assembly of the above have the same advantages as the prior art, which will not be repeated here.

[0021] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0023] Figure 1 is a cross-sectional view of a cylinder head assembly according to an embodiment of the present application Figure 1 ;

[0024] Figure 2 is a cross-sectional view of a cylinder head assembly according to an embodiment of the present application Figure 2 ;

[0025] Figure 3 is a cross-sectional view of a cylinder head assembly according to an embodiment of the present application Figure 3 ;

[0026] Figure 4 is a cross-sectional view of a cylinder head assembly according to an embodiment of the present application Figure 4 ;

[0027] Figure 5 is a cross-sectional view of a cylinder head assembly according to an embodiment of the present application Figure 5 .

[0028] Reference Signs:

[0029] cylinder head assembly 100,

[0030] cylinder head 1, intake port 11, cylinder head intake passage 12, cylinder head first passage 121, cylinder head second passage 122, cylinder head third passage 123,

[0031] cylinder head cover 2, cylinder head cover intake passage 21, cylinder head cover first passage 211, cylinder head cover second passage 212, cylinder head cover third passage 213, cylinder head cover fourth passage 214, valve chamber cavity 22, intake camshaft hole 221, exhaust camshaft hole 222,

[0032] oil-gas separator 3, small load passage 31, intake manifold 4, manifold intake port 41, manifold inner cavity 42. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein like or similar elements are denoted by like or similar reference signs throughout the drawings. The embodiments described below are exemplary only, and are not intended to limit the present application.

[0034] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0035] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Unless otherwise specified, the front-rear direction in the present application is the longitudinal direction of the vehicle, i.e. the X direction; the left-right direction is the lateral direction of the vehicle, i.e. the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e. the Z direction.

[0037] Reference will be made to the drawings below Figures 1-5 The cylinder head assembly 100 according to an embodiment of the present application is described below, which has simple structure, high integration, facilitates the arrangement of the cylinder head assembly 100, can reduce manufacturing cost, and can ensure the consistency of combustion efficiency between cylinders, improve the smoothness of engine power output and fuel economy.

[0038] As shown in the drawings, the cylinder head assembly 100 according to an embodiment of the present application comprises a cylinder head 1, a cylinder head cover 2 and an oil-gas separator 3. Figures 1-5

[0039] The cylinder head 1 is formed with a cylinder head intake passage 12, the cylinder head cover 2 is connected to the upper part of the cylinder head 1, the oil-gas separator 3 is connected to the upper part of the cylinder head cover 2, the cylinder head cover 2 is formed with a cylinder head cover intake passage 21, the oil-gas separator 3 is formed with a small load passage 31, and the cylinder head cover intake passage 21 is communicated with the small load passage 31, wherein the cylinder head 1 is provided with a plurality of intake ports 11, the cylinder head intake passage 12 comprises a cylinder head main passage and a plurality of cylinder head third passages 123, the cylinder head main passage is communicated between the cylinder head cover intake passage 21 and the plurality of cylinder head third passages 123, the plurality of cylinder head third passages 123 are respectively communicated with the plurality of intake ports 11 one by one, and the inner diameter of the small load passage 31 is greater than or equal to the inner diameter of the cylinder head third passage 123.

[0040] The cylinder head assembly 100 is installed above the cylinder block, and then the cylinder can be sealed from the upper part of the cylinder block to form a combustion chamber. When combustion occurs in the combustion chamber, high-temperature and high-pressure gas is generated, so that the cylinder head assembly 100 needs to withstand a large thermal load and mechanical load, and the blow-by gas generated during engine operation can be mixed with fresh air after oil-gas separation and then flow back into the cylinder through the passages in the cylinder head assembly 100 to react, thereby ensuring the reliability of engine operation.

[0041] ​Specifically, the cylinder head assembly 100 is provided with a cylinder head 1, which can be connected with a cylinder body to define a combustion chamber, fuel and gas can be introduced into the combustion chamber to burn in the combustion chamber, thereby generating high-temperature and high-pressure gas to provide power for the engine, and the cylinder head assembly 100 is also provided with a cylinder head cover 2 and an oil-gas separator 3, the cylinder head cover 2 is installed above the cylinder head 1, and the oil-gas separator 3 is installed above the cylinder head cover 2 to improve the integration of the cylinder head assembly 100, and the oil-gas separator 3 is formed with a small load passage 31, the blow-by gas generated during the operation of the engine will mix with the oil in the crankcase to form oil-gas after flowing through the crankcase, and the oil-gas can enter the oil-gas separator 3 through one end of the small load passage 31 to separate the oil-gas through the oil-gas separator 3 to ensure the purity of the gas flowing back into the combustion chamber, thereby ensuring the reliability of the engine operation and improving the performance of the engine.

[0042] Further, the cylinder head 1 is formed with a cylinder head intake passage 12, the cylinder head cover 2 is formed with a cylinder head cover intake passage 21, and the cylinder head cover intake passage 21 is communicated with the small load passage 31, that is, one end of the small load passage 31 is communicated with the inside of the oil-gas separator 3, and the other end is communicated with one end of the cylinder head cover intake passage 21, so that the gas separated by the oil-gas separator 3 can flow through the small load passage 31 to the cylinder head cover intake passage 21, and the cylinder head 1 is also formed with an intake port 11, and the cylinder head intake passage 12 can be respectively communicated between the cylinder head cover intake passage 21 and the intake port 11, so that the gas flowing to the cylinder head cover intake passage 21 can flow to the cylinder head intake passage 12, so that the gas can flow to the intake port 11 through the cylinder head intake passage 12, mix with fresh air, and then flow back to the cylinder through the intake port 11 to react in the cylinder, thereby the small load passage 31, the cylinder head cover intake passage 21 and the cylinder head intake passage 12 are all arranged in the cylinder head assembly 100, the external pipeline is cancelled, the integration of the cylinder head assembly 100 is improved, the structure of the cylinder head assembly 100 is simplified, the arrangement of the cylinder head assembly 100 is facilitated, and the manufacturing cost of the cylinder head assembly 100 can be reduced.

[0043] And the cylinder head intake passage 12 is provided with a cylinder head main passage and a plurality of cylinder head third passages 123, the plurality of cylinder head third passages 123 are all communicated with the cylinder head main passage, and the cylinder head main passage is communicated with the cylinder head cover intake passage 21, so that the gas flow can flow to the cylinder head main passage through the cylinder head cover intake passage 21, and then flow to the plurality of cylinder head third passages 123 through the cylinder head main passage, and the intake port 11 is also provided with a plurality of intake ports, the plurality of cylinder head third passages 123 are respectively communicated with the plurality of intake ports one by one, so that the gas flow at each cylinder head third passage 123 can flow to the corresponding intake port 11, to ensure the uniformity of the gas flow distributed to each intake port 11, thereby ensuring the consistency of the combustion efficiency between the cylinders.

[0044] In addition, the inner diameter of the small load passage 31 is greater than or equal to the inner diameter of the third passage 123 of the cylinder head, that is, the inner diameter of the small load passage 31 is greater than the inner diameter of the third passage 123 of the cylinder head, or the inner diameter of the small load passage 31 is equal to the inner diameter of the third passage 123 of the cylinder head. When the engine is in a small load working condition, the engine speed is low, and the amount of gas separated from the oil-gas separator 3 is small, which can effectively reduce the influence of the separated gas on the fresh gas flow at the intake port 11, reduce the influence on the gas flow at the intake port 11, and reduce the influence on the movement of the mixed gas flow or vortex in the cylinder, improve the smoothness of the engine power output, and improve the fuel economy.

[0045] According to the cylinder head assembly 100 provided by the embodiment of the present application, the small load passage 31, the cylinder head cover intake passage 21, and the cylinder head intake passage 12 are integrated in the cylinder head assembly 100, which can simplify the structure of the cylinder head assembly 100, improve the integration, facilitate the arrangement of the cylinder head assembly 100, reduce the manufacturing cost of the cylinder head assembly 100, and correspondingly communicate the plurality of third passages 123 of the cylinder head with the plurality of intake ports 11 one by one. The inner diameter of the small load passage 31 is greater than or equal to the inner diameter of the third passage 123 of the cylinder head, which can improve the flow rate of the gas flow and ensure the uniformity of the gas flow distribution to each intake port 11, thereby ensuring the consistency of the combustion efficiency between the cylinders, improving the smoothness of the engine power output, and improving the fuel economy. The use effect is better, and the application range is wider.

[0046] In some embodiments, the inner diameter of the third passage 123 of the cylinder head is d1, and satisfies: 1mm≤d1≤5mm.

[0047] Specifically, the third passage 123 of the cylinder head is provided in plurality, the cylinder head main passage can respectively convey the gas flow to the plurality of third passages 123 of the cylinder head, and the inner diameter of the third passage 123 of the cylinder head is d1, and satisfies: 1mm≤d1≤5mm, that is, the inner diameter d1 of the third passage 123 of the cylinder head can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0048] In this way, the inner diameter d1 of the third passage 123 of the cylinder head satisfies: 1mm≤d1≤5mm, which can avoid that the inner diameter of the third passage 123 of the cylinder head is too small to cause local high pressure in the cylinder head cover intake passage 21 and the small load passage 31, thereby causing poor exhaust of the gas flow in the small load passage 31, ensuring the stability of the operation of the crankcase, and avoiding leakage of the engine related parts or sealing surface, thereby ensuring the stability of the engine operation.

[0049] The inner diameter d1 of the third passage 123 of the cylinder head is set to satisfy 1mm≤d1≤5mm, so that the inner diameter of the third passage 123 of the cylinder head is not too large, the influence of the separated gas on the fresh air flow at the intake port 11 is effectively reduced, the influence on the air flow at the intake port 11 and the movement of the mixed gas flow or vortex in the cylinder is reduced, and the smoothness of the engine power output and the fuel economy are improved.

[0050] In some embodiments, the main passage of the cylinder head includes the first passage 121 and the second passage 122 of the cylinder head, the first passage 121 of the cylinder head is communicated with the intake passage 21 of the cylinder head cover, and the third passages 123 of the cylinder head are spaced apart along the length direction of the second passage 122 of the cylinder head and communicated with the second passage 122 of the cylinder head.

[0051] Specifically, the cylinder head intake passage 12 is provided with the main passage of the cylinder head and the third passages 123 of the cylinder head, the main passage of the cylinder head is communicated with the third passages 123 of the cylinder head, and as shown in the figure, Figure 1 the main passage of the cylinder head is further provided with the first passage 121 and the second passage 122 of the cylinder head, the first passage 121 and the second passage 122 of the cylinder head are communicated, and the first passage 121 of the cylinder head is communicated with the intake passage 21 of the cylinder head cover, so that the gas flow in the intake passage 21 of the cylinder head cover can flow into the first passage 121 of the cylinder head, and then flow into the second passage 122 of the cylinder head.

[0052] Further, the third passages 123 of the cylinder head are all communicated with the second passage 122 of the cylinder head, so that the gas flow flowing into the second passage 122 of the cylinder head can flow into the third passages 123 of the cylinder head respectively, and the third passages 123 of the cylinder head are spaced apart along the length direction of the second passage 122 of the cylinder head and communicated with the second passage 122 of the cylinder head, so that the gas flow flowing into the second passage 122 of the cylinder head can uniformly flow into each third passage 123 of the cylinder head, to ensure the uniformity of the gas flow delivered by the third passage 123 of the cylinder head to the corresponding intake port 11, and then to ensure the consistency of the combustion efficiency between the cylinders, to improve the engine operation reliability.

[0053] In some embodiments, the distance from the outlet end of the first passage 121 of the cylinder head to one end of the second passage 122 of the cylinder head is d2, the distance to the other end of the second passage 122 of the cylinder head is d3, the width of the intake port 11 along the length direction of the second passage 122 of the cylinder head is d4, and it satisfies |d2-d3|≤d4.

[0054] Specifically, the first cylinder head passage 121 is communicated with the second cylinder head passage 122 to deliver the airflow in the second cylinder head passage 122, and the extending direction of the first cylinder head passage 121 and the extending direction of the second cylinder head passage 122 have an included angle, so that there is a distance between the outlet end of the first cylinder head passage 121 and one end of the second cylinder head passage 122 and a distance between the outlet end of the first cylinder head passage 121 and the other end of the second cylinder head passage 122, and the distance between the outlet end of the first cylinder head passage 121 and one end of the second cylinder head passage 122 can be set as d2, the distance between the outlet end of the first cylinder head passage 121 and the other end of the second cylinder head passage 122 can be set as d3, the width of the intake port 11 in the length direction of the second cylinder head passage 122 is set as d4, and the following is satisfied: |d2-d3|≤d4.

[0055] In this way, the absolute value of the difference between the distance between the outlet end of the first cylinder head passage 121 and one end of the second cylinder head passage 122 and the distance between the outlet end of the first cylinder head passage 121 and the other end of the second cylinder head passage 122 is set to be less than or equal to the width of the intake port 11 in the length direction of the second cylinder head passage 122, so that the airflow can be uniformly distributed to the plurality of third cylinder head passages 123 after entering the second cylinder head passage 122 through the first cylinder head passage 121, thereby ensuring the stability and uniformity of the airflow entering each third cylinder head passage 123.

[0056] In some embodiments, the length direction of the first cylinder head passage 121 is perpendicular to the length direction of the second cylinder head passage 122.

[0057] Specifically, the first cylinder head passage 121 is communicated with the second cylinder head passage 122 to deliver the airflow in the second cylinder head passage 122, and as shown in Figure 2 the length direction of the first cylinder head passage 121 is perpendicular to the length direction of the second cylinder head passage 122, that is, the flow direction of the airflow in the first cylinder head passage 121 changes after flowing into the second cylinder head passage 122, thereby reducing the flow speed of the airflow, so that the airflow can flow to all parts of the second cylinder head passage 122 and then flow to the plurality of third cylinder head passages 123, thereby ensuring the consistency of the airflow flowing into each third cylinder head passage 123, ensuring the consistency of the combustion efficiency between the cylinders, and improving the reliability of the engine.

[0058] In other embodiments, the length direction of the third cylinder head passage 123 is perpendicular to the length direction of the second cylinder head passage 122.

[0059] Specifically, the plurality of third cylinder head passages 123 are communicated with the second cylinder head passage 122 in the length direction of the second cylinder head passage 122, so that the second cylinder head passage 122 can deliver the airflow to the plurality of third cylinder head passages 123, and as shown inFigure 2 As shown, the length direction of the cylinder head third passage 123 is perpendicular to the length direction of the cylinder head second passage 122, so that the gas flow can flow into the plurality of cylinder head third passages 123 after flowing along the cylinder head second passage 122, and the flow direction of the gas flow can change when the gas flow flows from the cylinder head second passage 122 into the cylinder head third passage 123, thereby reducing the flow rate of the gas flow, so that the fresh air at the intake port 11 can be fully mixed with the gas flow when the gas flow flows into the intake port 11, and local aggregation of the gas flow can be avoided, thereby avoiding abnormal combustion and the like, to ensure the reliability of the engine operation.

[0060] In some embodiments, the distance between the axis of the cylinder head third passage 123 and the cylinder center surface of the corresponding intake port 11 is d5, the distance between the center surface of the intake valve in the intake port 11 and the corresponding cylinder center surface is d6, and |d5-d6|≤d6 is satisfied.

[0061] Specifically, the cylinder head third passage 123 is connected to the intake port 11, so that the gas flow in the cylinder head third passage 123 can flow into the corresponding cylinder through the corresponding intake port 11 for re-combustion, and the distance between the axis of the cylinder head third passage 123 and the cylinder center surface of the corresponding intake port 11 is set as d5. The intake port 11 is also provided with an intake valve, and the gas flow in the intake port 11 can enter the cylinder through the intake valve to ensure the reliability of the gas entering the cylinder. The intake valve can be one or two, and in this embodiment, the intake valve is two, and one of the intake valves is arranged close to the cylinder head third passage 123. The distance between the center surface of the intake valve and the corresponding cylinder center surface is set as d6.

[0062] Further, the distance d5 between the axis of the cylinder head third passage 123 and the cylinder center surface of the corresponding intake port 11 and the distance d6 between the center surface of the intake valve in the intake port 11 and the corresponding cylinder center surface are set to satisfy |d5-d6|≤d6, that is, the absolute value of the difference between the distance d5 between the axis of the cylinder head third passage 123 and the cylinder center surface of the corresponding intake port 11 and the distance d6 between the center surface of the intake valve in the intake port 11 and the corresponding cylinder center surface is set to be less than or equal to the distance d6 between the center surface of the intake valve in the intake port 11 and the corresponding cylinder center surface. Preferably, the distance d5 between the axis of the cylinder head third passage 123 and the cylinder center surface of the corresponding intake port 11 and the distance d6 between the center surface of the intake valve in the intake port 11 and the corresponding cylinder center surface are set to be equal.

[0063] In this way, the third passage 123 of each cylinder head can avoid the high-speed airflow at the intake end of the intake port 11, prevent the airflow in the second passage 122 from being guided into the intake port 11 by the high-speed airflow at the intake end of the intake port 11, avoid the interference of excessive airflow on the mixture concentration, and further avoid abnormal combustion and combustion fluctuation caused by excessive airflow, thereby ensuring the smoothness and uniformity of combustion of each cylinder.

[0064] In some embodiments, the angle between the axis of the intake port 11 and the axis of the third passage 123 of the cylinder head is a1, and satisfies: a1 < 90°.

[0065] Specifically, the third passage 123 of the cylinder head can deliver airflow to the intake port 11, so that the airflow can mix with fresh air and then enter the cylinder through the intake port 11. Figure 5 As shown in the figure, there is an angle between the extension direction of the third passage 123 of the cylinder head and the extension direction of the intake port 11, and the angle between the axis of the intake port 11 and the axis of the third passage 123 of the cylinder head is a1, and satisfies: a1 < 90°, that is, the angle a1 between the axis of the intake port 11 and the axis of the third passage 123 of the cylinder head can be set to 89°, 80°, 75°, 70°, 65°, 60°, 55°, 50°, 45°, 40° or 35°, etc.

[0066] In this way, the flow direction of the airflow in the third passage 123 of the cylinder head is partially opposite to the flow direction of the fresh air flowing into the intake port 11, so that the fresh air can disperse the airflow in the third passage 123 of the cylinder head, so that the airflow and the fresh air can be fully mixed, avoiding the airflow and the fresh air flowing into the cylinder separately, causing the airflow to locally gather in the cylinder, and further causing abnormal combustion in the cylinder, etc., thereby improving the stability of the cylinder operation.

[0067] In some embodiments, the cylinder head assembly 100 further comprises an intake manifold 4 provided with a manifold intake port 41 and a manifold inner cavity 42, a plurality of intake ports 11 are respectively communicated with the manifold inner cavity 42, and the manifold intake port 41 is communicated with the manifold inner cavity 42; the manifold intake port 41 is located at one end of the manifold inner cavity 42, and the communication position of each third passage 123 of the cylinder head and the corresponding intake port 11 is located on the side of the cylinder center plane of the intake port 11 away from the manifold intake port 41.

[0068] Specifically, as shown in the figure, Figures 2-3As shown, the cylinder head assembly 100 is further provided with an intake manifold 4, which can be connected with the cylinder head 1, and fresh air from outside can be delivered to the intake ports 11 through the intake manifold 4. The intake manifold 4 is provided with a manifold air inlet 41 and a manifold inner cavity 42, which are in communication, so that fresh air can enter the manifold inner cavity 42 through the manifold air inlet 41, and the manifold inner cavity 42 is in communication with the plurality of intake ports 11, respectively, so that after the fresh air enters the manifold inner cavity 42 through the manifold air inlet 41, it can flow towards the plurality of intake ports 11, respectively, and then enter the corresponding intake port 11 after mixing with the airflow of each cylinder head third passage 123, to ensure the reliability of delivering the mixed gas to each cylinder, and to ensure the operation reliability of each cylinder.

[0069] Further, as shown, Figure 3 The manifold air inlet 41 is in communication with the manifold inner cavity 42, so that fresh air can flow into the manifold inner cavity 42 through the manifold air inlet 41, and the manifold air inlet 41 is located at one end of the manifold inner cavity 42, so that the flow rate of fresh air near the manifold air inlet 41 in the manifold inner cavity 42 is greater than that of fresh air away from the manifold air inlet 41 in the manifold inner cavity 42, and thus the energy of fresh air near the manifold air inlet 41 is higher, that is, during the cylinder intake process, the flow rate of fresh air near the intake end of the intake port 11 on the side of the manifold air inlet 41 is higher.

[0070] And the communication position of each cylinder head third passage 123 with the corresponding intake port 11 is located on the side of the cylinder center plane of the intake port 11 away from the manifold air inlet 41, so that each cylinder head third passage 123 can avoid the high-speed airflow of the manifold air inlet 41, prevent the airflow in the cylinder head second passage 122 from being excessively guided into the intake port 11 by the high-speed airflow at the intake end of the intake port 11, avoid excessive airflow from interfering with the concentration of the mixed gas, and thus avoid abnormal combustion and combustion fluctuation caused by excessive airflow, to ensure the smoothness and uniformity of combustion of each cylinder.

[0071] In actual arrangement, the distance d5 between the axis of the cylinder head third passage 123 and the cylinder center plane of the corresponding intake port 11 can be set to satisfy: d5≥0.

[0072] In some embodiments, the cylinder head cover intake passage 21 includes a cylinder head cover first passage 211, a cylinder head cover second passage 212, a cylinder head cover third passage 213 and a cylinder head cover fourth passage 214 in sequence, and any two adjacent ones of the cylinder head cover first passage 211, the cylinder head cover second passage 212, the cylinder head cover third passage 213 and the cylinder head cover fourth passage 214 form an included angle in the length direction, the cylinder head cover first passage 211 is in communication with the small load passage 31, and the cylinder head cover fourth passage 214 is in communication with the cylinder main passage.

[0073] Specifically, as shown,Figure 1 As shown, the cylinder head cover intake passage 21 is provided with four cylinder head cover first passages 211, cylinder head cover second passages 212, cylinder head cover third passages 213 and cylinder head cover fourth passages 214, which are sequentially connected to form a complete cylinder head cover intake passage 21, thereby ensuring the reliability of gas delivery.

[0074] Further, the cylinder head cover first passage 211 is connected with the small load passage 31, and the cylinder head cover fourth passage 214 is connected with the cylinder head intake passage 12, so that the gas in the small load passage 31 can flow into the cylinder head cover first passage 211, sequentially pass through the cylinder head cover second passage 212, the cylinder head cover third passage 213 and the cylinder head cover fourth passage 214, and flow into the cylinder head intake passage 12, and the length direction of any two adjacent ones of the cylinder head cover first passage 211, the cylinder head cover second passage 212, the cylinder head cover third passage 213 and the cylinder head cover fourth passage 214 forms an included angle, so that the cylinder head cover first passage 211, the cylinder head cover second passage 212, the cylinder head cover third passage 213 and the cylinder head cover fourth passage 214 are connected to form a bent cylinder head cover intake passage 21, thereby adapting to different cylinder head covers 2, and further improving the adaptability of the cylinder head cover intake passage 21, and meeting different use requirements.

[0075] In actual arrangement, the cylinder head cover intake passage 21 can also be provided with one, two or three, etc., according to the length requirement and the shape of the cylinder head cover 2, and the total length of the cylinder head cover intake passage 21 should be greater than or equal to the width of the valve chamber cavity 22 in the arrangement direction of the intake camshaft hole 221 and the exhaust camshaft hole 222, thereby ensuring the reliability of heating the gas in the cylinder head cover intake passage 21.

[0076] The sum of the lengths of the cylinder head cover first passage 211, the cylinder head cover second passage 212, the cylinder head cover third passage 213 and the cylinder head cover fourth passage 214 is greater than or equal to the width of the valve chamber cavity 22 in the arrangement direction of the intake camshaft hole 221 and the exhaust camshaft hole 222, that is, the sum of the lengths of the cylinder head cover first passage 211, the cylinder head cover second passage 212, the cylinder head cover third passage 213 and the cylinder head cover fourth passage 214 can be greater than the width of the valve chamber cavity 22 in the arrangement direction of the intake camshaft hole 221 and the exhaust camshaft hole 222, or can be equal to the width of the valve chamber cavity 22 in the arrangement direction of the intake camshaft hole 221 and the exhaust camshaft hole 222.

[0077] The width of the valve chamber cavity 22 in the arrangement direction of the intake camshaft hole 221 and the exhaust camshaft hole 222 is as shown in the following figure: Figure 4As shown in d9, the sum of the lengths of the cylinder head cover first channel 211, cylinder head cover second channel 212, cylinder head cover third channel 213, and cylinder head cover fourth channel 214 is... Figure 2 The sum of d10, d11, d12 and d13 in the equation.

[0078] This ensures that the total length of the cylinder head cover intake passage 21 is long enough, allowing the cylinder head cover intake passage 21 to be enveloped by as much of the high-temperature oil and gas in the valve chamber 22 as possible. It also increases the contact area between the valve chamber 22 and the outer peripheral wall of the cylinder head cover intake passage 21, so that the gas passage of the cylinder head cover 2 is kept at a higher temperature. This prevents the liquid carried by the gas in the cylinder head cover intake passage 21 from freezing and blocking the passage in low-temperature environments, thus ensuring the operational reliability of the cylinder head assembly 100, improving engine performance, and ensuring vehicle operational stability.

[0079] In some embodiments, the inner diameters of the first channel 211, the second channel 212, the third channel 213, and the fourth channel 214 of the cylinder head cover are all configured to be greater than or equal to the inner diameter of the low-load channel 31.

[0080] Specifically, such as Figure 4 As shown, the inner diameter of the first channel 211 of the cylinder head cover is set to b2, the inner diameter of the second channel 212 of the cylinder head cover is set to b3, the inner diameter of the third channel 213 of the cylinder head cover is set to b4, the inner diameter of the fourth channel 214 of the cylinder head cover is set to b5, and the inner diameter of the small load channel 31 is set to b1. The inner diameters of the first channel 211, the second channel 212, the third channel 213, and the fourth channel 214 of the cylinder head cover are all constructed to be greater than or equal to the inner diameter of the small load channel 31, that is, b2≥b1, b3≥b1, b4≥b1, and b5≥b1.

[0081] In this way, the inner diameters of the first channel 211, the second channel 212, the third channel 213, and the fourth channel 214 of the cylinder head cover are all set to be no less than the inner diameter of the low-load channel 31. This allows for a further increase in the surface area of ​​the cylinder head cover intake channel 21 without affecting the flow of gas after separation. This increases the surface area of ​​the cylinder head cover intake channel 21 in contact with the high-temperature oil and gas in the valve chamber 22, ensuring the reliability of heating the gas in the cylinder head cover intake channel 21 and thus guaranteeing the reliability of the cylinder head cover intake channel 21 in use.

[0082] In some embodiments, the cylinder head cover 2 is made of a metal material, including aluminum alloy or magnesium alloy.

[0083] Specifically, a valve chamber 22 is formed inside the cylinder head cover 2, such as Figure 1 and Figures 4-5As shown, the valve chamber 22 is used to accommodate the valve and its related components, the cylinder head cover 2 is provided with an intake camshaft hole 221 and an exhaust camshaft hole 222, the intake camshaft hole 221 is used to install the intake camshaft, ensure its accurate rotation, control the opening and closing of the intake valve, and then the air or mixture can enter the cylinder, the exhaust camshaft hole 222 is used to install the exhaust camshaft, ensure its accurate rotation, control the opening and closing of the exhaust valve, and then the exhaust gas after combustion can be discharged, ensure the reliability of engine operation, and the friction between the valve and the valve guide, the valve seat during engine operation will generate heat, the exhaust gas discharged through the exhaust valve is also a high-temperature gas, so that the valve chamber 22 has high-temperature oil gas, and the cylinder head cover intake passage 21 is provided in the envelope of the valve chamber 22, so that the high-temperature oil gas in the valve chamber 22 can heat the cylinder head cover intake passage 21, thereby avoiding the phenomenon of ice formation in the gas in the cylinder head cover intake passage 21, blocking the cylinder head cover intake passage 21, and ensuring the use reliability of the cylinder head cover intake passage 21.

[0084] Further, the cylinder head cover 2 can be made of metal material, and the metal material can be made of low-density metal alloy material such as aluminum alloy or magnesium alloy, so that the temperature of the oil gas in the valve chamber 22 can be transmitted to the metal material of the cylinder head cover 2, the temperature of the cylinder head cover intake passage 21 is increased, the separated gas in the cylinder head cover intake passage 21 is further heated, the risk of icing is reduced, the use reliability of the cylinder head cover intake passage 21 is ensured, and the engine operation stability is ensured.

[0085] The application further provides an engine.

[0086] The engine according to the embodiment of the application comprises the cylinder head assembly 100 according to any one of the above.

[0087] The engine according to the embodiment of the application is provided with the cylinder head assembly 100, and the cylinder head assembly 100 integrates the small load passage 31, the cylinder head cover intake passage 21 and the cylinder head intake passage 12 in the cylinder head assembly 100, so that the structure of the cylinder head assembly 100 is simplified, the integration degree is improved, the arrangement of the cylinder head assembly 100 is facilitated, the manufacturing cost of the cylinder head assembly 100 is reduced, the inner diameter of the small load passage 31 is greater than or equal to the inner diameter of the cylinder head third passage 123, the air flow is improved, the uniformity of the air flow distributed to each air inlet 11 is ensured, the consistency of the combustion efficiency of each cylinder is ensured, the smoothness of the engine power output and the fuel economy are improved, the use effect is better, and the application range is wider.

[0088] In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0089] Although embodiments of the application have been shown and described, it will be appreciated that those skilled in the art can make various changes, modifications, substitutions and alterations thereto without departing from the principles and scope of the application, which are defined by the claims and their equivalents.

Claims

1. A cylinder head assembly characterized by, The cylinder head is provided with a plurality of intake ports, the cylinder head intake passage comprises a cylinder head main passage and a plurality of cylinder head third passages, the cylinder head main passage is communicated between the cylinder head cover intake passage and the plurality of cylinder head third passages, and the plurality of cylinder head third passages are respectively communicated with the plurality of intake ports one by one. The inner diameter of the cylinder head third passage is d1, and 1mm≤d1≤5mm is satisfied. The cylinder head main passage comprises a cylinder head first passage and a cylinder head second passage which are communicated, the cylinder head first passage is communicated with the cylinder head cover intake passage, and the plurality of cylinder head third passages are communicated with the cylinder head second passage along the length direction of the cylinder head second passage. The distance from the outlet end of the cylinder head first passage to one end of the cylinder head second passage is d2, the distance to the other end of the cylinder head second passage is d3, the width of the intake port along the length direction of the cylinder head second passage is d4, and |d2-d3|≤d4 is satisfied.

2. The cylinder head assembly of claim 1, wherein The length direction of the cylinder head first passage is perpendicular to the length direction of the cylinder head second passage. The length direction of the cylinder head third passage is perpendicular to the length direction of the cylinder head second passage.

3. The cylinder head assembly of claim 2, wherein, The distance between the axis of the cylinder head third passage and the cylinder center surface of the corresponding intake port is d5, the distance between the center surface of the intake valve of the intake port and the corresponding cylinder center surface is d6, and |d5-d6|≤d6 is satisfied.

4. The cylinder head assembly of claim 2, wherein The included angle between the axis of the intake port and the axis of the cylinder head third passage is a1, and a1<90° is satisfied. The intake manifold is further provided with a manifold intake port and a manifold inner cavity, the plurality of intake ports are respectively communicated with the manifold inner cavity, and the manifold intake port is communicated with the manifold inner cavity.

5. The cylinder head assembly of claim 1, wherein The manifold intake port is located at one end of the manifold inner cavity, and the communication position of each cylinder head third passage and the corresponding intake port is located on the side of the cylinder center surface of the intake port away from the manifold intake port.

6. The cylinder head assembly of claim 1, wherein The cylinder head cover intake passage comprises a cylinder head cover first passage, a cylinder head cover second passage, a cylinder head cover third passage and a cylinder head cover fourth passage which are communicated in sequence, the length directions of any two adjacent ones of the cylinder head cover first passage, the cylinder head cover second passage, the cylinder head cover third passage and the cylinder head cover fourth passage form an included angle, the cylinder head cover first passage is communicated with the small load passage, and the cylinder head cover fourth passage is communicated with the cylinder head main passage.

7. The cylinder head assembly of claim 1, wherein The inner diameters of the cylinder head cover first passage, the cylinder head cover second passage, the cylinder head cover third passage and the cylinder head cover fourth passage are all configured to be greater than or equal to the inner diameter of the small load passage. ​ 8. The head assembly of any one of claims 1-7, wherein, ​ 9. The cylinder head assembly of claim 8, wherein, ​ 10. An engine characterized by, A cylinder head assembly comprising the cylinder head assembly of any one of claims 1-9.

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