Cylinder cover assembly and engine

Abstract

The utility model discloses a cylinder head assembly and an engine, the cylinder head assembly comprises a cylinder head cover, the upper side of the cylinder head cover is provided with a lower oil-gas separation groove, and the bottom wall of the lower oil-gas separation groove is provided with an oil-gas upper opening; the oil-gas separator is installed on the upper side of the cylinder head cover, an upper oil-gas separation cavity is further formed in the oil-gas separator, and a gas outlet is formed in the upper oil-gas separation cavity; wherein an upper oil-gas separation groove is formed in the lower side of the oil-gas separator, the upper oil-gas separation groove and the lower oil-gas separation groove jointly form a lower oil-gas separation cavity, the upper oil-gas separation cavity is communicated with the lower oil-gas separation cavity through a middle upper gas port, and an oil-gas shielding part is arranged in the upper oil-gas separation cavity and / or the lower oil-gas separation cavity. According to the cylinder head assembly, the space occupied by the oil-gas separator in the radial direction of the cylinder head cover is reduced, so that the arrangement space of the oil-gas separator is reduced, the compactness of the cylinder head assembly is improved, and compactness and miniaturization of an engine are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, especially a cylinder cover subassembly and the engine with the cylinder cover subassembly. BACKGROUND

[0002] The crankcase ventilation system of the engine is usually provided with an oil-gas separator to separate the blow-by gas flowing into the crankcase, so as to meet the increasingly stringent environmental protection, emission, safety and other regulatory requirements.

[0003] In the prior art, the oil-gas separator occupies a large space, which is not conducive to installation in a compact space or a small space, and cannot meet the use requirements. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving one of the technical problems in the prior art. To this end, the utility model provides a cylinder cover subassembly, which reduces the space occupied by the oil-gas separator in the radial direction of the cylinder cover, thereby reducing the arrangement space of the oil-gas separator, facilitating the arrangement of the oil-gas separator in a small space, and further improving the compactness of the cylinder cover subassembly, facilitating the compact and small size of the engine, and having a simple structure, low manufacturing cost and wide application range.

[0005] According to the cylinder cover subassembly of the utility model embodiment, the lower oil-gas separation groove formed on the upper side of the cylinder cover cover and the upper oil-gas separation groove formed on the lower side of the oil-gas separator jointly form a lower oil-gas separation cavity, which reduces the space occupied by the oil-gas separator in the radial direction of the cylinder cover cover, thereby reducing the arrangement space of the oil-gas separator, facilitating the arrangement of the oil-gas separator in a small space, and further improving the compactness of the cylinder cover subassembly, facilitating the compact and small size of the engine, and having a simple structure, low manufacturing cost and wide application range.

[0006] According to the cylinder cover subassembly of the utility model embodiment, the lower oil-gas separation groove formed on the upper side of the cylinder cover cover and the upper oil-gas separation groove formed on the lower side of the oil-gas separator jointly form a lower oil-gas separation cavity, which reduces the space occupied by the oil-gas separator in the radial direction of the cylinder cover cover, thereby reducing the arrangement space of the oil-gas separator, facilitating the arrangement of the oil-gas separator in a small space, and further improving the compactness of the cylinder cover subassembly, facilitating the compact and small size of the engine, and having a simple structure, low manufacturing cost and wide application range.

[0007] According to the cylinder cover assembly of some embodiments of the present application, the oil-gas blocking part comprises a first blocking part and a second blocking part in the lower oil-gas separation cavity, the first blocking part is configured to extend downwardly and protrude from the top wall of the upper oil-gas separation groove, the second blocking part is configured to extend upwardly and protrude from the bottom wall of the lower oil-gas separation cavity, and the first blocking part and the second blocking part are spaced apart and distributed between the oil-gas upper port and the intermediate upper gas port.

[0008] According to the cylinder cover assembly of some embodiments of the present application, at least part of the first blocking part extends into the lower oil-gas separation groove, and / or at least part of the first blocking part and the second blocking part overlap in the projection along the distribution direction of the oil-gas upper port and the intermediate upper gas port.

[0009] According to the cylinder cover assembly of some embodiments of the present application, the vertical height of the at least part of the first blocking part and the second blocking part overlapping is h3, the distance between the top wall of the upper oil-gas separation groove and the bottom wall of the lower oil-gas separation cavity is h8, and 0≤h3≤2 / 3h8 is satisfied.

[0010] According to the cylinder cover assembly of some embodiments of the present application, the oil-gas blocking part comprises a third blocking part in the upper oil-gas separation cavity, the third blocking part is configured to extend downwardly and protrude from the top wall of the upper oil-gas separation cavity, and the third blocking part is located between the intermediate upper gas port and the gas outlet.

[0011] According to the cylinder cover assembly of some embodiments of the present application, a blocking hole plate is further arranged in the upper oil-gas separation cavity, the blocking hole plate separates the upper oil-gas separation cavity into a first upper sub-cavity and a second upper sub-cavity, the intermediate upper gas port communicates with the first upper sub-cavity, the gas outlet communicates with the second upper sub-cavity, and the blocking hole plate is provided with a plurality of through holes communicating between the first upper sub-cavity and the second upper sub-cavity.

[0012] According to the cylinder cover assembly of some embodiments of the present application, an adsorption plate is further arranged in the second upper sub-cavity, the adsorption plate is distributed opposite to the blocking hole plate, the top of the adsorption plate is spaced apart from the top wall of the second upper sub-cavity, and the bottom of the adsorption plate is connected to the bottom of the blocking hole plate through a connecting blocking plate.

[0013] According to the cylinder cover assembly of some embodiments of the present application, the bottom wall of the oil gas separation cavity is provided with a first oil return port, the aperture of the first oil return port is d1, and d1 is greater than or equal to 1 mm; and / or, the bottom wall of the oil gas separation groove is provided with a second oil return port, the aperture of the second oil return port is d2, and d2 is less than or equal to 10 mm; and / or, the bottom wall of the oil gas separation cavity is provided with an oil return structure, at least part of the oil return structure extends into the oil gas upper port, the oil return structure is provided with an oil return channel which is in communication with the oil gas separation cavity, and the oil return channel is communicated into the oil gas upper port through an oil return hole.

[0014] According to the cylinder cover assembly of some embodiments of the present application, the lower side of the cylinder cover is provided with a plurality of camshaft seats, the camshaft seats are provided with camshaft holes, and the oil gas upper port is located between two of the camshaft seats; wherein, the oil gas upper port is provided with an oil gas baffle, and the distance between the lower end of the oil gas baffle and the inner wall of the camshaft hole is not greater than the running radius of the camshaft.

[0015] The utility model also proposes an engine.

[0016] According to the engine of the embodiment of the present application, the cylinder cover assembly of any one of the above embodiments is included.

[0017] The engine and the cylinder cover assembly have the same advantages as the prior art, and details are not repeated here.

[0018] The utility model also proposes a vehicle.

[0019] According to the vehicle of the embodiment of the present application, the engine of the above embodiment is included.

[0020] The vehicle and the engine have the same advantages as the prior art, and details are not repeated here.

[0021] Additional aspects and advantages of the present application will be described in part in the description that follows, and will become apparent from the description that follows, or will be learned by practice of the present application. 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 description that follows, including the appended drawings, in which:

[0023] Figure 1 is a structure diagram of the cylinder cover assembly according to the embodiment of the present application Figure 1 (installing the oil gas separator);

[0024] Figure 2 is Figure 1 cross-sectional view at A-A;

[0025] Figure 3 is Figure 2 a cross-sectional view at D-D;

[0026] Figure 4 is Figure 1 a cross-sectional view at C-C;

[0027] Figure 5 is Figure 1 a cross-sectional view at E-E;

[0028] Figure 6 is a structural schematic of a cylinder head assembly according to an embodiment of the present application Figure 2 (not installed oil-gas separator).

[0029] Reference signs:

[0030] cylinder head assembly 100,

[0031] cylinder head cover 1, lower oil-gas separation groove 11, oil-gas upper opening 111, flared portion 1111, oil-gas baffle 1112,

[0032] oil-gas separator 2, upper oil-gas separation cavity 21, shielding hole plate 211, through hole 2111, first upper sub-cavity 212, second upper sub-cavity 213, adsorption plate 214, first oil return portion 215, first oil return port 2151,

[0033] oil return structure 216, oil return channel 2161, oil return lifting portion 2162, oil return hole 2163, gas outlet 22, upper oil-gas separation groove 23, second oil return port 231, connecting shielding plate 217,

[0034] lower oil-gas separation cavity 24, intermediate upper gas port 25, first shielding portion 261, second shielding portion 262, third shielding portion 263,

[0035] camshaft seat 3, camshaft hole 4, valve chamber cavity 5, mounting surface 6. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0037] In the description of the utility model, it is necessary to understand that the orientation or positional relationship 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" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0038] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Unless otherwise specified, the front-rear direction in the application is the longitudinal direction of the vehicle, i.e. X direction; the left-right direction is the lateral direction of the vehicle, i.e. Y direction; the up-down direction is the vertical direction of the vehicle, i.e. Z direction.

[0040] Reference is made below Figures 1-6 The cylinder cover assembly 100 according to an embodiment of the utility model is described, which reduces the space occupied by the oil-gas separator 2 in the radial direction of the cylinder cover 1, thereby reducing the arrangement space of the oil-gas separator 2, facilitating the arrangement of the oil-gas separator 2 in a small space, thereby improving the compactness of the cylinder cover assembly 100, facilitating the compact miniaturization of the engine, simple structure, low manufacturing cost, wide application range.

[0041] As Figures 1-6 As shown in the figure, the cylinder cover assembly 100 according to an embodiment of the utility model comprises: a cylinder cover 1 and an oil-gas separator 2.

[0042] First of all, it needs to be explained that the internal combustion engine working process is usually: after inhaling the mixture, compression, then ignite or compression ignition of the mixture, so as to drive the piston to do work to generate power. From the compression of the mixture to the combustion, a very high pressure is generated, and the compressed mixture will flow out from the gap between the piston and the cylinder, the piston ring opening, the gap between the piston ring and the cylinder, etc. Into the crankcase, thereby forming crankcase blow-by. Because the blow-by contains harmful ingredients, therefore, the blow-by needs to be sucked into the combustion chamber from the intake system and then burned and discharged from the exhaust pipe. Because there is a large amount of high-temperature oil and oil vapor in the crankcase, therefore, the blow-by will carry oil vapor when passing through the crankcase (also from which the blow-by can be called "oil gas"), and this part of the oil will directly enter the combustion system with the blow-by, which will cause the combustion and emission to deteriorate. Therefore, in order to improve the economy and improve the emission, it is necessary to separate the oil droplets in the oil gas, and the oil gas separator 2 is used to realize the oil gas separation of the blow-by flowing into the crankcase.

[0043] As shown in Figure 2 and Figure 3 , the upper side of the cylinder cover 1 is formed with a lower oil gas separation groove 11, and the lower oil gas separation groove 11 is open upward, Figure 2 and Figure 3 The lower oil gas separation groove shown in

[0044] The oil gas separator 2 is used for oil gas separation of the blow-by (oil gas mixture) flowing into the crankcase, and the blow-by in the crankcase can enter the valve chamber 5 through the oil gas channel of the cylinder and the cylinder head, so that the oil gas mixture in the valve chamber 5 can be introduced into the oil gas separator 2 for oil gas separation.

[0045] As shown in Figure 2 and Figure 4 , the oil gas separator 2 is installed on the upper side of the cylinder cover 1, and the oil gas separator 2 can be arranged parallel to the upper side of the cylinder cover 1, that is, the bottom surface of the lower oil gas separation groove 11, or can be arranged at an angle with the bottom surface of the lower oil gas separation groove 11, that is, inclined arrangement. The oil gas separator 2 is also provided with an upper oil gas separation chamber 21, that is, the oil gas separator 2 is hollow to form an upper oil gas separation chamber 21, and the upper oil gas separation chamber 21 is used for effective separation of the oil gas mixer. The upper oil gas separation chamber 21 is provided with a gas outlet 22, that is, the gas in the upper oil gas separation chamber 21 after separation can be discharged through the gas outlet 22 to participate in the next gas circulation.

[0046] Further, as shown in Figure 2 andFigure 4 As shown, the lower side of the oil-gas separator 2 is formed with an upper oil-gas separation groove 23, the upper oil-gas separation groove 23 is open towards the lower oil-gas separation groove 11, and the upper oil-gas separation groove 23 matches the shape and size of the lower oil-gas separation groove 11, so that the upper oil-gas separation groove 23 can be arranged on the lower oil-gas separation groove 11, so that the upper oil-gas separation groove 23 and the lower oil-gas separation groove 11 together form a lower oil-gas separation cavity 24, which is also used for effective separation of the oil-gas mixture, wherein the lower oil-gas separation cavity 24 is the first rough separation, and the upper oil-gas separation cavity 21 is the fine separation, so that the oil-gas mixture can be separated for multiple times to improve the separation efficiency and achieve better separation effect.

[0047] Wherein, the upper oil-gas separation cavity 21 and the lower oil-gas separation cavity 24 are communicated through the intermediate upper gas port 25, and the oil-gas blocking part is arranged in the upper oil-gas separation cavity 21 and / or the lower oil-gas separation cavity 24. Figure 2 And Figure 4 As shown in the upper oil-gas separation cavity 21 and the lower oil-gas separation cavity 24, the oil-gas blocking part is arranged in the upper oil-gas separation cavity 21 and the lower oil-gas separation cavity 24, and the oil-gas blocking part is used to block the flowing oil-gas mixture to separate the oil-gas mixture, the rough separation of the oil-gas mixture can be realized in the lower oil-gas separation cavity 24 through the oil-gas blocking part, and then the oil-gas mixture after the rough separation can flow to the upper oil-gas separation cavity 21 through the upper gas port 25, and then the fine separation of the oil-gas mixture can be realized through the oil-gas blocking part in the upper oil-gas separation cavity 21, so that the whole separation process is completed, the effective separation of the oil-gas mixture is realized, and the oil-gas separation efficiency is improved.

[0048] It should be noted that the upper oil-gas separation cavity 21 is jointly formed by the lower oil-gas separation groove 11 located on the upper side of the cylinder cover 1 and the upper oil-gas separation groove 23 located on the lower side of the oil-gas separator 2, that is, the oil-gas separator 2 and the cylinder cover 1 jointly form the upper oil-gas separation cavity 21, thereby reducing the occupation space of the oil-gas separator 2 in the radial direction of the cylinder cover 1, thereby reducing the arrangement space of the oil-gas separator 2, facilitating the arrangement of the oil-gas separator 2 in a small space, and further improving the compactness of the cylinder cover assembly 100, facilitating the compact and small size of the engine, simple structure, low manufacturing cost, and wide application range.

[0049] According to the cylinder cover assembly 100 of the embodiment of the utility model, the lower oil-gas separation groove 11 formed on the upper side of the cylinder cover 1 and the upper oil-gas separation groove 23 formed on the lower side of the oil-gas separator 2 jointly form the lower oil-gas separation cavity 24, thereby reducing the occupation space of the oil-gas separator 2 in the radial direction of the cylinder cover 1, thereby reducing the arrangement space of the oil-gas separator 2, facilitating the arrangement of the oil-gas separator 2 in a small space, and further improving the compactness of the cylinder cover assembly 100, facilitating the compact and small size of the engine, simple structure, low manufacturing cost, and wide application range.

[0050] In some embodiments, as shown in Figure 2 and Figure 4 The oil-gas blocking part includes a first blocking part 261 and a second blocking part 262 in the lower oil-gas separation cavity 24, both of which are used to block the flow of the oil-gas mixture to achieve oil-gas separation.

[0051] The first blocking part 261 is configured to extend downward from the top wall of the upper oil-gas separation groove 23 and extend into the lower oil-gas separation cavity 24, and the second blocking part 262 is configured to extend upward from the bottom wall of the lower oil-gas separation cavity 24, that is, the first blocking part 261 is arranged on the oil-gas separator 2, and the second blocking part 262 is arranged on the cylinder head cover 1, and the first blocking part 261 and the second blocking part 262 are spaced apart and distributed between the oil-gas upper port 111 and the intermediate upper gas port 25, as shown in Figure 2 The oil-gas upper port 111 and the intermediate upper gas port 25 are distributed at both ends along the radial direction of the cylinder head cover 1, so that the flow direction of the oil-gas mixture can be adapted, and the separation efficiency can be improved.

[0052] In actual design, the number of first blocking parts 261 and second blocking parts 262 is not limited and can be flexibly arranged according to actual needs, and the first blocking parts 261 and the second blocking parts 262 can be arranged alternately. Figure 2 and Figure 4 For example, two first blocking parts 261 and one second blocking part 262 are arranged as shown in The second blocking part 262 is located between the two first blocking parts 261, and the gas flow moves from left to right. First, the oil-gas mixture flowing through the oil-gas upper port 111 moves into the lower oil-gas separation cavity 24, and then moves rightward along the axial direction of the cylinder head cover 1. When it moves to the first first blocking part 261, part of the gas flow will impact the first first blocking part 261. At this time, the oil droplets in the oil-gas mixture will adhere to the first first blocking part 261, thereby achieving the first oil-gas separation. The oil-gas mixture after the first oil-gas separation and the remaining gas flow can continue to move rightward through the lower space of the first first blocking part 261. When it moves to the second blocking part 262, the gas flow will impact the second blocking part 262. At this time, the oil droplets in the oil-gas mixture will adhere to the second blocking part 262, thereby achieving the second oil-gas separation. The oil-gas mixture after the second oil-gas separation can continue to move rightward through the upper space of the second blocking part 262. When it moves to the second first blocking part 261, the gas flow will impact the second first blocking part 261. At this time, the oil droplets in the oil-gas mixture will adhere to the second first blocking part 261 again, thereby achieving the third oil-gas separation. After that, the oil-gas mixture can flow upward through the intermediate upper gas port 25 into the upper oil-gas separation cavity 21 for further separation.

[0053] Thus, by three times separation of the oil-gas mixture in the lower oil-gas separation chamber 24, the oil droplets in the mixture are greatly reduced, and the separation efficiency is improved.

[0054] The first shielding part 261 and the second shielding part 262 can be arranged in at least one, or multiple first shielding parts 261 and multiple second shielding parts 262 can be arranged, so that the shielding effect of the first shielding part 261 and the second shielding part 262 on the airflow movement of the oil-gas mixture can be effectively achieved, so that more oil droplets in the mixture adhere to the first shielding part 261 and the second shielding part 262, improving the separation efficiency. At the same time, the airflow movement can pass through multiple shielding parts, so that more large-diameter oil droplets in the mixture can be adhered before the oil-gas mixture enters the upper oil-gas separation chamber 21, better achieving coarse separation, so that the fine separation pressure in the upper oil-gas separation chamber 21 can be reduced, further improving the separation efficiency and achieving better separation effect.

[0055] In some embodiments, as shown in Figure 2 At least part of the first shielding part 261 extends downward into the lower oil-gas separation groove 11.

[0056] Thus, the height of the first shielding part 261 in the lower oil-gas separation chamber 24 can be higher, so that the shielding area of the first shielding part 261 can be increased, so that the oil-gas mixture can be better shielded and more oil droplets can be adhered.

[0057] In other embodiments, at least part of the first shielding part 261 and the second shielding part 262 overlap in the projection along the distribution direction of the oil-gas upper port 111 and the intermediate upper gas port 25.

[0058] Specifically, as shown in Figure 2 and Figure 4 As shown in Figure 2 and Figure 4 The left-right direction is the distribution direction of the oil-gas upper port 111 and the intermediate upper gas port 25, the oil-gas upper port 111 is located on the left side, and the intermediate upper gas port 25 is located on the right side. Thus, at least part of the first shielding part 261 and the second shielding part 262 overlap in the projection along the left-right direction, so that more airflow can be shielded, and oil droplets in the oil-gas mixture can be fully adhered, improving the separation efficiency and achieving better separation effect.

[0059] In actual design, the first shielding part 261 and the second shielding part 262 can be vertically arranged or inclinedly arranged.

[0060] In some embodiments, as shown in Figure 4As shown, the vertical height of the at least partially overlapping first and second blocking portions 261 and 262 is h3, which satisfies: 0≤h3≤2 / 3h8. Figure 2 As shown, the distance between the top wall of the upper oil-gas separation chamber 21 and the bottom wall of the lower oil-gas separation chamber 24 is h8, and satisfies: 0≤h3≤2 / 3h8.

[0061] It can be understood that the greater h3 is set, the higher the overlapping height of the first and second blocking portions 261 and 262 is, but it cannot be too high, that is, h3 cannot be set too large. If h3 is set too large, it will reduce the size of the passage through which the gas flows, thereby affecting the flowability of the gas flow. Figure 2 and Figure 4 As shown, the lower space of the first blocking portion 261 and the upper space of the second blocking portion 262 are passages through which the gas flows.

[0062] Therefore, by limiting the vertical height h3 of the at least partially overlapping first and second blocking portions 261 and 262 to a reasonable range of 0 to 2 / 3h8, more gas flow can be blocked, and the oil droplets in the oil-gas mixture can be fully adhered, while ensuring the smoothness of the gas flow.

[0063] In some embodiments, as shown in Figure 2 and Figure 4 As shown, the oil-gas blocking portion includes a third blocking portion 263 located in the upper oil-gas separation chamber 21, the third blocking portion 263 is configured to extend downwardly and protrude from the top wall of the upper oil-gas separation chamber 21, and the third blocking portion 263 is located between the intermediate upper gas port 25 and the gas outlet 22.

[0064] Therefore, after the oil-gas mixture in the lower oil-gas separation chamber 24 is separated, the oil-gas mixture continues to flow upward through the intermediate upper gas port 25 into the upper oil-gas separation chamber 21, and then the oil-gas mixture is impacted to the top wall of the upper oil-gas separation chamber 21 at the intermediate upper gas port 25 under the action of the inertia of the gas flow. At this time, the oil droplets in the oil-gas mixture can adhere to the top wall of the upper oil-gas separation chamber 21, thereby realizing the fourth oil-gas separation. Then the oil-gas mixture can continue to move to the left, and when it moves to the third blocking portion 263, the gas flow is impacted to the third blocking portion 263. At this time, the oil droplets in the oil-gas mixture adhere to the third blocking portion 263, thereby realizing oil-gas separation again. Finally, the mixed gas separated by the third blocking portion 263 can be discharged through the gas outlet 22.

[0065] In some embodiments, as shown in Figures 2-4As shown, the upper oil-gas separation cavity 21 is also provided with a shielding hole plate 211 vertically arranged to divide the upper oil-gas separation cavity 21 into a first upper sub-cavity 212 and a second upper sub-cavity 213, the first upper sub-cavity 212 and the second upper sub-cavity 213 are distributed transversely, the middle upper gas inlet 25 is communicated with the first upper sub-cavity 212, and the gas outlet 22 is communicated with the second upper sub-cavity 213, the shielding hole plate 211 is provided with a plurality of through holes 2111 communicated between the first upper sub-cavity 212 and the second upper sub-cavity 213, that is, the gas in the first upper sub-cavity 212 and the second upper sub-cavity 213 can flow through each other through the plurality of through holes 2111, and the specific shape of the through hole 2111 is not limited.

[0066] Therefore, the oil-gas mixture through the middle upper gas inlet 25 can enter the first upper sub-cavity 212 to perform the fourth oil-gas separation, that is, impact the top wall of the upper oil-gas separation cavity 21 to separate again, and the separated mixture can continue to enter the second upper sub-cavity 213 through the through hole 2111 under the action of the pressure difference, and separate again in the second upper sub-cavity 213, and finally the gas separated in the second upper sub-cavity 213 is discharged through the gas outlet 22 to participate in the next gas circulation.

[0067] In actual design, the through hole 2111 can be a special hole, which can be regularly shaped or irregularly shaped, for example, can be a circular hole, an oval hole, a square hole, an L-shaped hole, an 8-shaped hole, a tapered hole, a polygonal hole, etc., which can be flexibly set according to actual conditions and needs.

[0068] In some embodiments, as shown in Figures 2-4 As shown, the second upper sub-cavity 213 is also provided with an adsorption plate 214, which can adsorb more oil droplets to separate even smaller oil droplets from the mixture, thereby improving the separation efficiency and effect, the adsorption plate 214 is distributed opposite to the shielding hole plate 211, Figures 2-4 As shown in the middle, the adsorption plate 214 and the shielding hole plate 211 are both vertically arranged, and the adsorption plate 214 and the shielding hole plate 211 are spaced apart by a certain distance in the transverse direction, so as to facilitate the mixture through the special hole 2111 to impact on the adsorption plate 214 to adsorb the oil droplets.

[0069] Further, as shown in Figure 2 and Figure 4 As shown, the top of the adsorption plate 214 is spaced apart from the top wall of the second upper sub-cavity 213 to form a gas flow passage at the top of the adsorption plate 214, that is, the gas flow passage is the space between the top of the adsorption plate 214 and the top wall of the second upper sub-cavity 213, and the bottom of the adsorption plate 214 is connected with the bottom of the shielding hole plate 211 through the connecting shielding plate 217 to prevent the gas flow from flowing through the bottom of the adsorption plate 214.

[0070] Thus, the mixed gas adhered by the adsorption plate 214 can change the airflow direction under the shielding of the adsorption plate 214 to continue flowing upward to impact the top wall of the upper oil-gas separation chamber 21 again, so that the top wall of the upper oil-gas separation chamber 21 adsorbs oil droplets again, and oil-gas separation is realized.

[0071] As shown in Figure 2 and Figure 4 , the top airflow can continue to flow to the left and impact the third shielding part 263 located in the second upper sub-chamber 213 to perform the last shielding adsorption and oil-gas separation. The gas after the final separation is discharged through the gas outlet 22 to participate in the next gas circulation.

[0072] In some embodiments, as shown in Figure 4 , the bottom wall of the upper oil-gas separation chamber 21 is provided with a first oil return port 2151, the aperture of the first oil return port 2151 is d1, and d1≥1mm is satisfied.

[0073] Specifically, the aperture d1 of the first oil return port 2151 can be set to 1mm, 1.2mm, 1.5mm, 2.0mm, or other values greater than 1mm. As shown in Figure 4 , the first oil return port 2151 is arranged at the first upper sub-chamber 212. The oil droplets adhered to the top wall of the upper oil-gas separation chamber 21 can fall into the first oil return part 215 under the action of gravity after gathering into large oil droplets, and then flow into the lower oil-gas separation chamber 24 through the first oil return port 2151 and drop on the bottom wall of the lower oil-gas separation groove 11.

[0074] The aperture d1 of the first oil return port 2151 should not be too large or too small. If the aperture d1 of the first oil return port 2151 is too small, the oil return capacity will be weak, which can easily cause the aggregation of machine oil, pollute the mixed gas, and affect the oil-gas separation effect. If the aperture d1 of the first oil return port 2151 is too large, the mixed gas can flow into the upper oil-gas separation chamber 21 through the first oil return port 2151, which can affect the separation efficiency and separation effect of the fine separation.

[0075] Thus, by limiting the aperture d1 of the first oil return port 2151 to be greater than or equal to 1mm, the oil return capacity can be effectively ensured, and the aggregation of machine oil to pollute the mixed gas can be prevented. At the same time, d1 should not be set too large to avoid affecting the separation efficiency and separation effect of the fine separation.

[0076] In other embodiments, as shown in Figure 2 , the bottom wall of the upper oil-gas separation groove 23 is provided with a second oil return port 231, the aperture of the second oil return port 231 is d2, and d2≤10mm is satisfied.

[0077] Specifically, the hole diameter d2 of the second oil return port 231 can be set to 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, or other values less than 10 mm. Figure 2 As shown in FIG. 11, the bottom wall of the upper oil-gas separation chamber 21 is provided with an oil return structure 216, at least part of the oil return structure 216 extends into the oil-gas upper port 111, the oil return structure 216 is provided with an oil return passage 2161 in communication with the upper oil-gas separation chamber 21, and the oil return passage 2161 is communicated into the oil-gas upper port 111 through an oil return hole 2163.

[0078] The value of the hole diameter d2 of the second oil return port 231 should not be too large or too small. If the hole diameter d2 of the second oil return port 231 is too small, the oil return capacity will be weak, which can easily cause the aggregation of oil, secondary pollution of the mixed gas, and affect the oil-gas separation effect. If the hole diameter d2 of the second oil return port 231 is too large, although the oil return capacity is improved, the high-concentration oil-gas mixture in the valve chamber 5 can easily enter the lower oil-gas separation chamber 24 through the second oil return port 231 and participate in the movement of the oil-gas mixture, which can increase the proportion of oil droplets in the mixed gas, and further affect the separation efficiency and separation effect of the fine separation.

[0079] Therefore, by limiting the hole diameter d2 of the second oil return port 231 to be less than or equal to 10 mm, the oil return capacity can be effectively guaranteed, and the aggregation of oil to pollute the mixed gas can be prevented. At the same time, the hole diameter d2 should not be set too large to avoid affecting the separation efficiency and separation effect of the fine separation.

[0080] In other embodiments, as shown in FIG. 11, the bottom wall of the upper oil-gas separation chamber 21 is provided with an oil return structure 216, at least part of the oil return structure 216 extends into the oil-gas upper port 111, the oil return structure 216 is provided with an oil return passage 2161 in communication with the upper oil-gas separation chamber 21, and the oil return passage 2161 is communicated into the oil-gas upper port 111 through an oil return hole 2163. Figure 4 and Figure 5 The oil droplets adhering to the top wall of the upper oil-gas separation chamber 21 can fall into the oil return structure 216 under the action of gravity after being aggregated into large oil droplets, and then enter the oil return passage 2161, flow through the oil return passage 2161 to the oil return hole 2163, and then be discharged from the oil-gas separator 2 and returned to the oil pool in the valve chamber 5.

[0081] Therefore, by limiting the hole diameter d2 of the second oil return port 231 to be less than or equal to 10 mm, the oil return capacity can be effectively guaranteed, and the aggregation of oil to pollute the mixed gas can be prevented. At the same time, the hole diameter d2 should not be set too large to avoid affecting the separation efficiency and separation effect of the fine separation.

[0082] In actual design, as shown in FIG. 11, the bottom wall of the upper oil-gas separation chamber 21 is provided with an oil return structure 216, at least part of the oil return structure 216 extends into the oil-gas upper port 111, the oil return structure 216 is provided with an oil return passage 2161 in communication with the upper oil-gas separation chamber 21, and the oil return passage 2161 is communicated into the oil-gas upper port 111 through an oil return hole 2163. Figure 5As shown, the oil return structure 216 can also be provided with an oil return lifting portion 2162, and the height difference between the bottom wall of the oil return structure 216 and the oil return lifting portion 2162 is h9, that is, h9 is the distance between the oil return lifting portion 2162 and the bottom oil return structure 216, and the size of h9 can be flexibly set according to actual needs. By providing the oil return lifting portion 2162, the oil droplet discharge efficiency of the oil return structure 216 can be effectively increased.

[0083] In some embodiments, as shown in Figure 2 and Figure 4 As shown, the lower side of the cylinder cover 1 is provided with a plurality of camshaft seats 3 for supporting the camshaft to ensure smooth rotation of the camshaft, thereby controlling the opening and closing of the valve. The camshaft seat 3 is provided with a camshaft hole 4 for installing the camshaft, and the camshaft cooperates with the corresponding parts on the cylinder cover through the camshaft hole 4 to ensure the correct movement of the valve. The oil and gas inlet 111 is located between two camshaft seats 3, that is, an opening is provided between the two camshaft seats 3, and the opening is the oil and gas inlet 111. In this way, during engine operation, the blow-by gas in the crankcase can enter the valve chamber 5 and then enter the oil and gas separator 2 inside through the oil and gas inlet 111 for oil and gas separation.

[0084] In actual design, in order to achieve the best effect, the oil and gas inlet 111 can be arranged at the middle position of the camshaft seat 3.

[0085] Further, the oil and gas inlet 111 is provided with an oil and gas baffle 1112, as shown in Figure 4 The oil and gas baffle 1112 extends downward and is located on both sides of the oil and gas inlet 111, and the distance between the lower end of the oil and gas baffle 1112 and the inner wall of the camshaft hole 4 is not greater than the running radius of the camshaft, as shown in Figure 2 h7 in the figure is the distance between the lower end of the oil and gas baffle 1112 and the inner wall of the camshaft hole 4. By setting the distance between the lower end of the oil and gas baffle 1112 and the inner wall of the camshaft hole 4 to be greater than the running radius of the camshaft, the turbulent airflow in the valve chamber 5 stirred by the camshaft can be effectively prevented from entering the oil and gas inlet 111, thereby affecting the oil and gas separation efficiency.

[0086] In addition, the distance between the lower end of the oil and gas baffle 1112 and the inner wall of the camshaft hole 4 can also be set to be not less than 1 mm, for example, it can be 1 mm, 2 mm, 3 mm, etc. In this way, the distance between the lower end of the oil and gas baffle 1112 and the inner wall of the camshaft hole 4 can be effectively prevented from being too small, which affects the circumferential running of the camshaft and reduces the risk of the camshaft contacting the oil and gas baffle 1112, that is, the normal running of the camshaft is ensured.

[0087] Therefore, by setting h7 to be not less than 1mm and not more than the running radius of the camshaft, the turbulent airflow in the valve chamber cavity 5 stirred by the running of the camshaft is effectively prevented from entering the oil-gas upper port 111, affecting the oil-gas separation efficiency, and the normal running of the camshaft is ensured.

[0088] In some other embodiments, in order to increase the gas volume of the oil-gas upper port 111, a flared portion 1111 can also be arranged, as shown in the figure. Figure 5 As shown in the figure, the flared portion 1111 is arranged along the extension direction of the oil-gas upper port 111 and extends upward in the extension direction of the oil-gas upper port 111, and the distance between the flared portion 1111 and the mounting surface 6 of the oil-gas separator 2 is h6, which can be set to be not more than the distance between the oil-gas baffle 1112 and the mounting surface 6 of the oil-gas separator 2, so that the gas in the valve chamber cavity 5 can be guided into the oil-gas upper port 111 as much as possible in the limited arrangement space, and the gas volume of the oil-gas upper port 111 is increased.

[0089] The utility model discloses still propose a kind of engine.

[0090] According to the engine of the utility model embodiment, the lower oil-gas separation groove 11 formed on the upper side of the cylinder cover 1 and the upper oil-gas separation groove 23 formed on the lower side of the oil-gas separator 2 jointly form the lower oil-gas separation cavity 24, which reduces the space occupied by the oil-gas separator 2 in the radial direction of the cylinder cover 1, thereby reducing the arrangement space of the oil-gas separator 2, facilitating the arrangement of the oil-gas separator 2 in a small space, and further improving the compactness of the cylinder head assembly 100, facilitating the compact and small size of the engine, simple structure, low manufacturing cost and wide application range.

[0091] The utility model discloses still propose a kind of vehicle.

[0092] According to the vehicle of the utility model embodiment, the engine described above is arranged, which can improve the power performance and fuel economy of the vehicle, save space and improve the overall space utilization of the vehicle.

[0093] According to the vehicle of the utility model embodiment, the engine described above is arranged, which can improve the power performance and fuel economy of the vehicle, save space and improve the overall space utilization of the vehicle.

[0094] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cylinder head assembly, characterized in that, include: Cylinder head cover, wherein a lower oil-gas separation groove is formed on the upper side of the cylinder head cover, and an oil-gas inlet is provided on the bottom wall of the lower oil-gas separation groove; An oil-gas separator is installed on the upper side of the cylinder head cover. The oil-gas separator is also provided with an upper oil-gas separation chamber, and the upper oil-gas separation chamber is provided with an outlet. The oil-gas separator has an upper oil-gas separation groove on its lower side. The upper oil-gas separation groove and the lower oil-gas separation groove together form a lower oil-gas separation chamber. The upper oil-gas separation chamber and the lower oil-gas separation chamber are connected through an intermediate upper air port. The upper oil-gas separation chamber and / or the lower oil-gas separation chamber are provided with oil-gas shielding parts.

2. The cylinder head assembly according to claim 1, characterized in that, The oil and gas shielding part includes a first shielding part and a second shielding part located in the lower oil and gas separation chamber. The first shielding part is configured to extend downward from the top wall of the upper oil and gas separation groove, and the second shielding part is configured to extend upward from the bottom wall of the lower oil and gas separation chamber. The first shielding part and the second shielding part are spaced apart and distributed between the upper oil and gas inlet and the middle upper gas inlet.

3. The cylinder head assembly according to claim 2, characterized in that, At least a portion of the first shielding part extends into the lower oil-gas separator tank; And / or, in the projection along the distribution direction of the oil and gas inlet and the intermediate gas inlet, the first shielding portion and the second shielding portion at least partially overlap.

4. The cylinder head assembly according to claim 3, characterized in that, The vertical height at which the first shielding part and the second shielding part at least partially overlap is h3, and the distance between the top wall of the upper oil-gas separation tank and the bottom wall of the lower oil-gas separation chamber is h8, satisfying: 0≤h3≤2 / 3h8.

5. The cylinder head assembly according to claim 1, characterized in that, The oil and gas shielding part includes a third shielding part located in the upper oil and gas separation chamber. The third shielding part is configured to extend downward from the top wall of the upper oil and gas separation chamber and is located between the middle upper gas port and the gas outlet.

6. The cylinder head assembly according to claim 1, characterized in that, The upper oil-gas separation chamber is also provided with a shielding plate, which divides the upper oil-gas separation chamber into a first upper sub-chamber and a second upper sub-chamber. The middle upper gas port is connected to the first upper sub-chamber, and the gas outlet is connected to the second upper sub-chamber. The shielding plate is provided with a plurality of through holes connecting the first upper sub-chamber and the second upper sub-chamber.

7. The cylinder head assembly according to claim 6, characterized in that, The second upper cavity is also provided with an adsorption plate, which is distributed opposite to the shielding plate. The top of the adsorption plate is spaced apart from the top wall of the second upper cavity, and the bottom of the adsorption plate is connected to the bottom of the shielding plate through a connecting shielding plate.

8. The cylinder head assembly according to claim 1, characterized in that, The bottom wall of the upper oil-gas separation chamber is provided with a first oil return port, the diameter of the first oil return port is d1, and satisfies: d1≥1mm; And / or, the bottom wall of the upper oil-gas separator is provided with a second oil return port, the diameter of the second oil return port is d2, and satisfies: d2≤10mm; And / or, the bottom wall of the upper oil-gas separation chamber is provided with an oil return structure, at least a portion of the oil return structure extends into the upper oil-gas inlet, the oil return structure is provided with an oil return channel communicating with the upper oil-gas separation chamber, and the oil return channel is connected to the upper oil-gas inlet through an oil return hole.

9. The cylinder head assembly according to claim 1, characterized in that, The cylinder head cover has multiple camshaft seats on its lower side, and each camshaft seat has a camshaft hole. The oil and gas inlet is located between two of the camshaft seats. The oil and gas inlet is provided with an oil and gas baffle, and the distance between the lower end of the oil and gas baffle and the inner wall of the camshaft hole is not greater than the operating radius of the camshaft.

10. An engine, characterized in that, Includes the cylinder head assembly according to any one of claims 1-9.

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