A cylinder head cover and an engine

Abstract

This utility model provides a cylinder head cover and an engine, relating to the field of engines. The cylinder head cover includes a cylinder head cover body, a condenser, and an oil reservoir. The cylinder head cover body has a high-load oil-gas passage, and the condenser has an oil flow passage and a cooling flow passage. The high-load oil-gas passage is connected to the oil flow passage, and the oil reservoir is connected to the oil flow passage via an oil collection pipe, which is located at the lowest point of the oil flow passage. When the engine operates under high load, the generated oil and gas enter the oil flow passage of the condenser after passing through the high-load oil-gas passage. The cooling medium in the cooling flow passage exchanges heat with the oil and gas in the oil flow passage, causing the oil and gas to liquefy into oil droplets. The oil droplets converge at the lowest point of the oil flow passage and are then guided to the oil reservoir via the oil collection pipe, achieving complete separation of oil and gas. This prevents excessive oil and gas from seeping out of the engine block surface and solves the problem of excessive pressure in the crankcase. This utility model also provides an engine, including a cylinder head cover.

Description

Technical Field

[0001] This utility model relates to the field of engines, and more specifically, to a cylinder head cover and an engine. Background Technology

[0002] The cylinder head cover is a cover that covers the engine block. It seals and collects the oil and gas generated in the crankcase. After the oil and gas flow passes through the labyrinth structure, spoiler and filter holes, the oil and gas are separated. The separated liquid oil droplets flow back into the cylinder, and the gaseous oil is introduced into the intake manifold and burned with the air-fuel mixture, reducing engine emissions.

[0003] Existing cylinder head covers are all designed with a structure that includes both high-load and low-load passages, such as... Figure 3 and Figure 4 When the engine is operating under light load, the generated oil-gas flow is directed unidirectionally into the intake manifold through the PCV valve passage. When the engine is operating under heavy load, the generated oil-gas flow passes through the crankcase ventilation pipe, flows to the air supply unit, and then enters the intake manifold. During heavy engine operation, the oil-gas flow contains a higher oil content, and ordinary labyrinth structures, spoilers, and filters cannot completely separate the oil and gas, causing liquid oil to seep onto the cylinder block surface. In severe cases, this can lead to excessively high crankcase pressure, affecting engine operation and service life. Utility Model Content

[0004] This invention provides a cylinder head cover and an engine that can achieve complete oil-gas separation when the engine is operating under heavy load.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a cylinder head cover, which includes:

[0007] The cylinder head cover body has a high-load oil and gas passage;

[0008] The condenser has an oil flow channel and a cooling flow channel. The high-load oil-gas channel is connected to the oil flow channel, while the oil flow channel and the cooling flow channel are separated. The cooling medium in the cooling flow channel exchanges heat with the oil and gas in the oil flow channel, causing the oil and gas to liquefy into oil droplets.

[0009] The oil storage tank is connected to the oil and gas flow channel via an oil collection pipe, and the oil collection pipe is connected at the lowest point of the oil and gas flow channel.

[0010] Optionally, an oil and gas guiding device is provided between the oil and gas flow channel and the high-load oil and gas channel, which guides the oil and gas flow in the high-load oil and gas channel into the oil and gas flow channel.

[0011] Optionally, the oil and gas guiding device is a curved pipe, with both ends of the curved pipe connected to a high-load oil and gas channel and an oil and gas flow channel, respectively.

[0012] Optionally, an oil and gas adsorption element is provided on the curved pipe.

[0013] Optionally, a control device is also provided on the cylinder head cover, the control device including a protective housing and a controller, the controller being located inside the protective housing.

[0014] Optionally, a level detector is installed on the oil storage tank. The level detector is used to detect the height of the oil level inside the oil storage tank and is connected to the controller.

[0015] Optionally, the bottom of the oil tank is connected to an oil drain pipe, which is connected to the engine block. A switch valve is also installed on the oil drain pipe, and the switch valve is connected to the controller.

[0016] Optionally, a thermometer is installed on the condenser, and the thermometer is communicatively connected to the controller.

[0017] Optionally, a check valve is installed on the oil collection pipe.

[0018] An embodiment of this utility model also provides an engine, including a cylinder head cover.

[0019] The beneficial effects of this utility model embodiment:

[0020] The cylinder head cover includes a cylinder head cover body, a condenser, and an oil reservoir. The cylinder head cover body has a high-load oil-gas passage, and the condenser has an oil flow passage and a cooling flow passage. The high-load oil-gas passage is connected to the oil flow passage, while the oil flow passage and the cooling flow passage are separated. The oil reservoir is connected to the oil flow passage via an oil collection pipe, which is connected to the lowest point of the oil flow passage. When the engine is operating under high load, the generated oil and gas enter the oil flow passage of the condenser after passing through the high-load oil-gas passage. The cooling medium in the cooling flow passage exchanges heat with the oil and gas in the oil flow passage, causing the oil and gas to liquefy into oil droplets. The oil droplets converge at the lowest point of the oil flow passage and are then guided to the oil reservoir through the oil collection pipe, achieving complete separation of oil and gas. This prevents excessive oil and gas from seeping out of the engine block surface and also solves the problem of excessive pressure in the crankcase.

[0021] The engine includes a cylinder head cover, which has all the functions of a cylinder head cover. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the connection of the cylinder head cover provided in an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the condenser provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the cylinder head cover provided in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the connection of an existing cylinder head cover.

[0027] Icons: 1-Cylinder head cover body; 10-High load oil-gas passage; 11-Low load oil-gas passage; 2-Condenser; 20-Oil-gas passage; 21-Cooling passage; 3-Oil reservoir; 30-Oil collection pipe; 31-Oil drain pipe; 4-Oil-gas guiding device; 5-Control device; 6-Level gauge; 80-Air supply device; 81-Air filter; 82-Intake manifold; 83-Engine block; 84-PCV valve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0033] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0036] The cylinder head cover is a cover that covers the engine block 83. It seals and collects the oil and gas generated in the crankcase. After the oil and gas flow passes through the labyrinth structure, spoiler and filter holes, the oil and gas are separated. The separated liquid oil droplets flow back into the cylinder, and the gaseous oil is introduced into the intake manifold 82 and burned with the air-fuel mixture, reducing engine emissions pollution.

[0037] Existing cylinder head covers are all designed with a structure that includes both high-load and low-load passages, such as... Figure 3 and Figure 4When the engine is operating under light load, the generated oil-gas flow passes through the low-load channel and is unidirectionally introduced into the intake manifold 82 via the PCV valve 84. Gaseous engine oil enters the intake manifold 82 and then combusts with the air-fuel mixture. When the engine is operating under heavy load, the generated oil-gas flow passes through the crankcase ventilation pipe, flows to the air supply device 80, enters the air filter 81, and then enters the intake manifold 82. During heavy engine operation, the oil-gas flow contains a high oil content. Ordinary labyrinth structures, spoilers, and filter holes cannot completely separate the oil and gas, causing liquid engine oil to seep onto the cylinder block surface. In severe cases, this can lead to excessively high crankcase pressure, affecting engine operation and service life.

[0038] To address the aforementioned problems, embodiments of this utility model provide a cylinder head cover and an engine, which will be described in detail below.

[0039] Please refer to Figures 1 to 3 The cylinder head cover includes a cylinder head cover body 1, a condenser 2, and an oil reservoir 3. The cylinder head cover body 1 has a high-load oil and gas passage 10. The condenser 2 has an oil flow passage 20 and a cooling flow passage 21. The high-load oil and gas passage 10 is connected to the oil flow passage 20. The oil flow passage 20 and the cooling flow passage 21 are spaced apart. The oil reservoir 3 is connected to the oil flow passage 20 through an oil collection pipe 30, and the oil collection pipe 30 is connected to the lowest position of the oil flow passage 20.

[0040] When the engine is under heavy load, the oil-gas flow generated in the crankcase undergoes preliminary oil-gas separation through the existing labyrinth structure, spoiler, and filter holes before entering the oil-gas flow channel 20 of the condenser 2. Further condensation and liquefaction occur in the condenser 2 in this embodiment. The cooling medium in the cooling channel 21 exchanges heat with the oil-gas in the oil-gas flow channel 20, causing the oil-gas to liquefy into oil droplets. These droplets converge at the lowest point of the oil-gas flow channel 20 and are then guided through the oil collection pipe 30 to the oil reservoir 3, achieving complete oil-gas separation. This prevents excessive oil-gas leakage from the engine block surface and also solves the problem of excessive pressure in the crankcase.

[0041] Since the inlet cross-sectional area of ​​the oil and gas flow channel 20 of the condenser 2 is small, an oil and gas guiding device 4 can be installed between the oil and gas flow channel 20 and the high-load oil and gas channel 10. The oil and gas flow in the high-load oil and gas channel 10 can be quickly introduced into the oil and gas flow channel 20 through the oil and gas guiding device 4.

[0042] For example, the oil and gas guiding device 4 is a curved pipe, with its two ends connected to the high-load oil and gas channel 10 and the oil and gas flow channel 20, respectively. The curved pipe has a large-diameter end and a small-diameter end. The large-diameter end is set towards the high-load oil and gas channel 10, and the small-diameter end is connected to the oil and gas flow channel 20. In this way, the oil and gas flow in the high-load oil and gas channel 10 can be more concentrated and introduced into the oil and gas flow channel 20 more quickly.

[0043] Optionally, an oil and gas adsorption element can be installed at the inlet end or inside the curved pipe. The oil and gas adsorption element initially adsorbs the oil and gas, accelerating the liquefaction process of the oil and gas in the oil and gas flow, and then the oil and gas flow flows into the oil and gas flow channel 20. For example, the oil and gas adsorption element is a filter cotton. The oil and gas in the oil and gas flow adheres to the filter cotton and is then condensed into oil droplets and collected.

[0044] The cooling channel 21 of the condenser 2 is connected to an external pipe for the flow of cooling water, enabling heat exchange with the oil and gas flow. The condenser 2 has excellent thermal conductivity, allowing heat from the oil and gas flow to be transferred to the vicinity of the cooling channel 21 for heat exchange with the cooling water. The cooling channel 21 can be located near the outside of the oil and gas flow channel 20 to achieve rapid heat exchange; for example, as... Figure 2 The cooling channel 21 is arranged in a spiral pipe around the outside of the oil and gas channel 20, which can increase the heat exchange time between the cooling water and the oil and gas flow in the oil and gas channel 20.

[0045] The oil and gas flow channel 20 can also be configured in a curved shape to increase the length of the flow channel and increase the heat exchange time with the cooling water. For example, the oil and gas flow channel 20 can be configured in a zigzag shape.

[0046] Optionally, a thermometer is also installed on the condenser 2. The thermometer can be placed near the outlet of the oil-gas flow channel 20 to measure the temperature of the oil-gas flow exiting from the oil-gas flow channel 20, thereby adjusting the temperature of the incoming cooling water to ensure that the condenser 2 can always liquefy the gaseous engine oil in the oil-gas flow. A commercially available infrared thermometer can be used as the thermometer.

[0047] refer to Figure 1 The oil storage tank 3 is equipped with a level detector 6, which is used to detect the height of the oil level inside the oil storage tank 3 so that the liquid oil can be discharged in time when it reaches a predetermined height. The level detector 6 can be a suitable existing product on the market; or a simple device can be set, such as installing a contact sensor on the inner wall of the oil storage tank 3 at a preset height, with a circular floating ring placed on the oil surface. When the floating ring contacts the contact sensor, it means that the oil level has reached the height for discharge.

[0048] When the liquid engine oil in the oil reservoir 3 reaches the discharge limit, it needs to be discharged from the oil reservoir 3 in a timely manner. Therefore, an oil drain pipe 31 is connected to the bottom of the oil reservoir 3. The oil drain pipe 31 can be connected to the engine block 83 or to the outside environment to drain the liquid engine oil in the oil reservoir 3. A switch valve is also installed on the oil drain pipe 31, and the oil is discharged / collected by controlling the opening / closing of the switch valve.

[0049] A control device 5 is also installed on the cylinder head cover. The control device 5 includes a protective housing and a controller. The controller is located inside the protective housing and is protected by the housing. The controller is communicatively connected to the switching valve, the level detector 6, and the thermometer. The controller, the level detector 6, and the thermometer are all electrically connected to an external power source. The switching valve can be a solenoid valve. The temperature data measured by the thermometer is transmitted to the controller, which then transmits the data to the outside for real-time monitoring. When the level detector 6 detects that the liquid oil level in the oil tank 3 has reached a predetermined level, it transmits the signal to the controller, which instructs the switching valve to open, thus draining the oil. In this embodiment, the oil draining time from the oil tank 3 is selected when the engine is not running. Of course, the thermometer, the level detector 6, and the switching valve in this embodiment all have communication functions. The controller in this embodiment can be a commercially available logic processor, and the corresponding execution instructions can be written using existing programming techniques. The writing of execution instructions is easy using existing technology and is considered prior art, so it will not be described in detail here.

[0050] To prevent the liquid engine oil in the oil tank 3 from evaporating and re-entering the oil flow channel 20 of the condenser 2, a one-way valve can also be installed on the oil collection pipe 30 to ensure that the airflow can only flow from the condenser 2 side to the oil tank 3 side.

[0051] In this embodiment, the condenser 2, the oil tank 3, and the oil-gas guiding device 4 are installed inside the high-load oil-gas passage 10 of the cylinder head cover body 1.

[0052] The cylinder head cover body 1 of this utility model embodiment is also provided with a low-load oil-gas passage 11. When the engine is working under low load, the generated oil-gas flow is introduced into the intake manifold 82 in one direction through the PCV valve 84 passage from the low-load passage. After the gaseous oil is introduced into the intake manifold 82, it is burned with the air-fuel mixture.

[0053] The cylinder head cover of this utility model embodiment can achieve complete separation of oil and gas, avoid excessive oil and gas seepage on the surface of the engine cylinder block, and also solve the problem of excessive pressure in the crankcase.

[0054] An embodiment of this utility model also provides an engine, which includes a cylinder head cover and has all the functions of a cylinder head cover.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A cylinder head cover characterized by, include: Cylinder head cover body (1), the cylinder head cover body (1) has a high-load oil and gas passage (10); The condenser (2) has an oil flow channel (20) and a cooling flow channel (21). The high-load oil-gas passage (10) is connected to the oil flow channel (20). The oil flow channel (20) and the cooling flow channel (21) are separated. The cooling medium in the cooling flow channel (21) exchanges heat with the oil and gas in the oil flow channel (20), so that the oil and gas liquefy into oil droplets. An oil storage tank (3) is connected to the oil and gas flow channel (20) via an oil collection pipe (30), and the oil collection pipe (30) is connected to the lowest position of the oil and gas flow channel (20).

2. The cylinder head cover of claim 1, wherein An oil and gas guiding device (4) is provided between the oil and gas flow channel (20) and the high-load oil and gas channel (10). The oil and gas guiding device (4) guides the oil and gas flow in the high-load oil and gas channel (10) into the oil and gas flow channel (20).

3. The cylinder head cover of claim 2, wherein, The oil and gas guiding device (4) is a curved pipe, and the two ends of the curved pipe are respectively connected to the high-load oil and gas channel (10) and the oil and gas flow channel (20).

4. The cylinder head cover of claim 3, wherein The curved pipe is equipped with an oil and gas adsorption element.

5. The cylinder head cover of claim 1, wherein, The cylinder head cover is also provided with a control device (5), which includes a protective housing and a controller, the controller being located inside the protective housing.

6. The cylinder head cover of claim 5, wherein, The oil storage tank (3) is equipped with a liquid level detector (6), which is used to detect the height of the oil level inside the oil storage tank (3). The liquid level detector (6) is connected to the controller.

7. The cylinder head cover of claim 5, wherein The bottom of the oil storage tank (3) is connected to an oil drain pipe (31), which is connected to the engine cylinder block (83). A switch valve is also provided on the oil drain pipe (31), which is connected to the controller.

8. The cylinder head cover of claim 5, wherein, A thermometer is installed on the condenser (2), and the thermometer is communicatively connected to the controller.

9. The cylinder head cover according to any one of claims 1 to 8, characterized in that A one-way valve is installed on the oil collection pipe (30).

10. An engine characterized by, Includes the cylinder head cover as described in any one of claims 1-9.

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