Timing cover, engine and vehicle

Abstract

The invention provides a timing cover cap, an engine and a vehicle, a cover cap body of the timing cover cap comprises an inner side and an outer side, and the inner side is connected with a crankcase and defines a cavity for containing blow-by gas; the cover cap body is provided with a first through hole used for supplying air to the cavity, the first through hole is provided with a first end and a second end, the first end is communicated to the outer side to receive external air, and the second end is communicated to the inner side to supply air to the cavity. According to the timing cover cap, the air supply channel is internally arranged through the first through hole, an independent external air supply pipeline is not needed, the peripheral arrangement of the whole engine is simplified, and the cost of the whole engine is reduced. Meanwhile, due to the fact that the air supply channel is internally arranged, when passing through the first through hole, the external atmosphere makes contact with the timing cover and the internal air for preheating, the temperature difference between the external atmosphere and the internal air of the crankcase can be reduced in the preheating process, and condensate water is prevented from being generated.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and more specifically to a crankcase air replenishment system, an engine and a vehicle. Background Art

[0002] At present, the crankcase will produce combustion residues, oil vapor and other blowby gases during operation. These blowby gases need to be removed in time. At the same time, the air in the crankcase will be diluted, resulting in a decrease in oxygen content. In order to keep the air inside the crankcase fresh and meet the oxygen required for the combustion process of the internal combustion engine, fresh air needs to be introduced for air replenishment. The existing crankcase air replenishment scheme generally directly sets the air replenishment hole on the crankcase and introduces fresh air directly into the crankcase. Due to the temperature difference between the fresh air and the blowby gas, condensed water is easily generated, affecting the oil quality in the oil pan at the bottom of the crankcase.

[0003] Therefore, it is necessary to provide a crankcase air supplementation system, an engine and a vehicle to at least partially solve the above problems. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the first aspect of the present application provides a timing cover, comprising:

[0006] A cover body, the cover body comprising an inner side and an outer side, the inner side being connected to the crankcase and defining a cavity for accommodating blow-by gas; wherein,

[0007] The cover body has a first through hole for replenishing air into the cavity, the first through hole has a first end and a second end, the first end is connected to the outside to receive external air, and the second end is connected to the inside to replenish air into the cavity.

[0008] According to the crankcase air replenishment system of the first aspect of the present application, the inner side of the timing cover body defines a cavity for accommodating blowby gas, and the timing cover body is provided with a first through hole, so that air replenishment to the crankcase can be achieved. With the help of the first through hole, the air replenishment channel is built-in, and there is no need for a separate external air replenishment pipeline, which simplifies the peripheral layout of the entire engine and reduces the cost of the entire machine. At the same time, since the air replenishment channel is built-in, the outside atmosphere contacts the timing cover and the internal air when passing through the first through hole, and is preheated. This preheating process can reduce the temperature difference between the outside atmosphere and the gas inside the crankcase, and avoid the generation of condensed water. The timing cover of the present application only has a first through hole, which preheats the intake air while achieving air replenishment, avoids redundant design, and improves the reliability and durability of the engine.

[0009] Optionally, a one-way valve is further included, and the one-way valve is arranged in the first through hole.

[0010] Optionally, the cover body has a second through hole for installing an oil dipstick, and the second through hole passes through the inner side and the outer side of the cover body; wherein,

[0011] The second through hole is communicated with the second end portion, and the second end portion is communicated with the cavity through the second through hole.

[0012] Optionally, the timing cover includes a first portion and a second portion spaced apart in the up-down direction, the first portion is used to connect with the cylinder head, the second portion is used to connect with the crankcase, and the inner side of the second portion and the crankcase define a cavity for accommodating blowby gas;

[0013] The first through hole and the second through hole are both provided in the first portion;

[0014] The timing cover further comprises a conduit located inside the cover body, one end of the conduit is inserted into the second through hole, and the other end of the conduit extends to the inner side of the second part.

[0015] Optionally, the second through hole is provided at the top of the first portion and penetrates the first portion in an up-down direction.

[0016] Optionally, along the length direction of the second through hole, the conduit is lower than the second opening.

[0017] Optionally, the outer wall of the conduit is sealedly connected to the second through hole.

[0018] A second aspect of the present application provides an engine, comprising a crankcase and the above-mentioned timing cover, wherein the timing cover is connected to the crankcase.

[0019] According to the engine of the second aspect of the present application, the use of a timing cover with an air supply mechanism can improve engine performance, help control the internal pressure of the engine, reduce the impact of pollutants and condensed water on the inside of the engine, and thus improve the reliability and life of the engine.

[0020] Optionally, the timing cover includes a cover body, the inner side of the cover body is connected to the crankcase and defines a cavity for accommodating blowby gas, the cover body includes a first through hole for replenishing air to the cavity and a second through hole for installing an oil dipstick, the second through hole runs through the inner side and the outer side of the cover body, the first through hole has a first end and a second end, the first end is connected to the outer side to receive external air, the second end is connected to the second through hole, and the first through hole is connected to the cavity through the second through hole;

[0021] The engine further comprises an oil dipstick, which is inserted into the second through hole. Along the length direction of the second through hole, the top end of the oil dipstick is sealed and connected to the second through hole.

[0022] Optionally, it further comprises a cylinder head, a cylinder head cover and an intake system, wherein the cylinder head cover, the cylinder head and the crankcase are sequentially arranged in the up-down direction, and a ventilation channel is provided on the cylinder head cover, wherein:

[0023] The inlet end of the ventilation channel is connected to the cavity, and the outlet end is connected to the air intake end of the air intake system.

[0024] A third aspect of the present application provides a vehicle comprising the above-mentioned engine.

[0025] The vehicle according to the third aspect of the present application has higher fuel economy, increased driving force and power performance, extended engine life and improved driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings of the embodiments of the present application are hereby used as part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, and are used to explain the principles of the present application. In the drawings,

[0027] Figure 1 This is a schematic diagram of a timing cover according to a preferred embodiment of the present application.

[0028] Description of Reference Numerals

[0029] 10: Timing cover

[0030] 11: First through hole

[0031] 111: First end

[0032] 112: Second end

[0033] 12: Second through hole

[0034] 20: Oil dipstick

[0035] 21: Catheter

[0036] 22: First seal

[0037] 23: Second seal

[0038] 30: One-way valve

[0039] 40: Crankcase

[0040] 50: Oil pan DETAILED DESCRIPTION

[0041] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application embodiments, some technical features well known in the art are not described.

[0042] Herein, ordinal numbers such as “first” and “second” cited in the present application are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term “first component” itself does not imply the existence of the “second component”, and the term “second component” itself does not imply the existence of the “first component”.

[0043] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0044] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0045] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0046] In the present application, the engine at least includes a timing cover and a cylinder block. Among them, the timing cover is located at the front of the engine cylinder block, and the timing cover is installed on the cover above the engine timing chain or timing belt to protect the timing system. The cylinder block is used to accommodate components such as cylinders and pistons. The cylinder block at least includes a cylinder head cover, a cylinder head, and a crankcase. The cylinder head is a component connected to the top of the engine cylinder block, the cylinder head cover is a cover installed above the cylinder head, and the crankcase is the bottom shell of the engine cylinder block, which is used to accommodate components such as the crankshaft, connecting rod, and piston. The crankcase also includes an oil pan for storing the engine's oil. For ease of understanding, Figure 1 Only the timing cover 10, the crankcase 40, and the oil pan 50 are shown, and other components of the engine are omitted.

[0047] like Figure 1 As shown, the present application provides a timing cover, in which the timing cover is used to connect with the crankcase. The cover body of the timing cover 10 includes an inner side and an outer side, wherein the inner side is connected to the crankcase and defines a cavity for accommodating blowby gas. A first through hole 11 for replenishing air to the cavity is provided on the timing cover 10. The first through hole 11 has a first end 111 and a second end 112. The first end 111 is connected to the outside to receive the outside air, and the second end 112 is connected to the inside to replenish air to the cavity. In the present application, the air replenishment channel is built-in with the help of the first through hole 11, and a separate external air replenishment pipeline is not required, which simplifies the peripheral layout of the engine and reduces the cost of the whole machine. At the same time, since the air replenishment channel is built-in, the outside atmosphere contacts with the timing cover 10 with a higher temperature and the internal air with a higher ambient temperature when passing through the timing cover 10, and this contact causes the temperature of the outside atmosphere to gradually increase, so that it approaches or reaches the temperature inside the crankcase. The preheating process can reduce the temperature difference between the outside atmosphere and the gas inside the crankcase 40. If the outside atmosphere is at a low temperature and the temperature difference between the outside atmosphere and the gas inside the crankcase 40 is large, condensed water may be formed. The preheating process increases the outside atmosphere temperature, reduces the temperature difference between the outside atmosphere and the gas inside the crankcase, and thus reduces the risk of condensed water formation, which helps keep the inside of the crankcase 40 dry and improves its reliability and performance.

[0048] In some embodiments of the present application, the timing cover 10 is further provided with a one-way valve 30, which is installed in the first through hole 11. The one-way valve 30 can ensure that the outside atmosphere is introduced only when needed, avoiding unnecessary introduction of outside air into the air supply channel.

[0049] In some embodiments of the present application, the cover body 10 is provided with a second through hole 12 for installing the oil dipstick 20. The second through hole 12 runs through the inner and outer sides of the cover body. The second through hole 12 is connected to the second end 112, and the second end 112 is connected to the cavity through the second through hole 12. It can be understood that the oil dipstick 20 is installed in the second through hole 12, and there is a certain gap between the oil dipstick 20 and the inner wall of the second through hole 12, so that the second through hole 12 is connected to the first through hole 11, and then the outside atmosphere can be introduced from the one-way valve 30 and enter the first through hole 11 and the second through hole 12 in sequence. In the present application, the timing cover 10 is covered on the engine cylinder block, and the timing cover 10 is provided with an oil dipstick 20, which is used to measure the amount of oil in the oil pan 50. When the timing cover 10 is installed with the oil dipstick 20, a corresponding mounting structure (i.e., the second through hole 12) needs to be provided. The second through hole 12 provided in the present application is connected to the first through hole 11, and a passage for supplying outside air to the crankcase 40 is formed by the provision of the first through hole 11 and the second through hole 12. The present application uses the existing oil dipstick installation structure, adds the first through hole 11 and the one-way valve 30, realizes the air replenishment of the crankcase 40, and sets the air replenishment passage in the engine body, occupying less external space.

[0050] In some embodiments of the present application, the timing cover 10 includes a first part and a second part spaced apart in the vertical direction, the first part is used to connect with the cylinder head, the second part is used to connect with the crankcase 40, and the inner side of the second part and the crankcase 40 define a cavity for accommodating blowby gas. The first through hole 11 and the second through hole 12 are both provided in the first part. The timing cover 10 also includes a conduit 21 located inside the cover body, one end of the conduit 21 is inserted in the second through hole 12, and the other end of the conduit 21 extends to the inner side of the second part. In this embodiment, the conduit 21 guides the intake air of the second through hole 12 into the crankcase 40 to guide the flow direction of the supplementary air. The oil dipstick 20 is inserted in the conduit 21. In this embodiment, the conduit 21 is connected to the cavity. The provision of the conduit 21 prolongs the distance before the outside atmosphere enters the crankcase 40. When the engine is running normally, the high temperature gas and friction in the combustion chamber will cause the temperature of the engine parts to rise, so that the temperature of the engine oil used for cooling and lubrication will also rise, and then the temperature of the oil dipstick 20 used to measure the amount of oil will rise, and the temperature around the oil dipstick 20 will also rise. Therefore, when the outside atmosphere flows through the first through hole 11, it will come into close contact with the oil dipstick 20, so that the temperature of the outside atmosphere will also rise. By setting the conduit 21, the contact area and time between the outside atmosphere and the oil dipstick 20 are extended, so that the temperature of the outside atmosphere is further increased. On the other hand, the conduit 21 extends the length of the first through hole 11, thereby extending the support structure for the oil dipstick 20, so that it can work stably. In a preferred embodiment, along the length direction of the oil dipstick 20, the bottom end of the conduit 21 extends to the cavity containing the blowby gas, and the bottom end of the oil dipstick 20 extends to the outside of the conduit 21, more specifically, the bottom end of the oil dipstick 20 extends to the oil pan.

[0051] In some embodiments of the present application, the second through hole 12 is disposed at the top of the first portion and penetrates the first portion in the up-down direction. That is, the second through hole 12 penetrates the top of the timing cover 10, so that the conduit 21 disposed in the second through hole 12 can extend to the cavity, and the oil dipstick 20 disposed in the conduit 21 can extend to the oil pan.

[0052] On the basis of the above embodiment, along the length direction of the second through hole 12, the top of the conduit 21 is lower than the second opening 112. In this embodiment, the conduit 21 has high independence, is easy to install, and has relatively low manufacturing cost. It can be understood that in other embodiments, the top of the conduit 21 can be higher than the first through hole 11. At this time, it is necessary to open an inlet on the side wall of the conduit 21 as an air inlet end, and the air inlet end needs to be flush with the first through hole 11, and the air inlet end is not less than the first through hole 11 to ensure the maximum intake efficiency. In this embodiment, the conduit 21 has a large effective area for the oil dipstick 20 and can provide stable support for the oil dipstick 20. In the air replenishment channel formed by the above embodiment, when the air replenishment cavity is in a negative pressure state, the one-way valve 30 plays a key role. The one-way valve 30 introduces fresh air from the outside into the first through hole 11 in a one-way manner, and then enters the crankcase 40 through the second through hole 12 and the oil dipstick conduit 21. There is no need to set up a power supply device, so that the crankcase 40 can be replenished with fresh air in time. At the same time, the fresh air can be preheated during the air replenishment process. Therefore, through the setting of the air replenishment channel of the present application, the normal working state of the crankcase 40 can be maintained, and the working conditions inside the crankcase 40 can be improved; at the same time, the exhaust gas in the crankcase 40 can be discharged more smoothly, avoiding the accumulation of exhaust gas in the crankcase 40, affecting the sealing and lubrication effects, and reducing the corrosion and damage of pollutants to the crankcase 40 and internal components.

[0053] On the basis of the above-mentioned embodiment, the outer wall of the conduit 21 is sealed and connected to the second through hole 12. The inner wall of the conduit 21 is spaced apart from the oil dipstick 20. The seal between the outer wall of the conduit 21 and the second through hole 12 can be one or more of a rubber seal, a metal seal, a threaded seal, and a welding seal. Specifically, the rubber seal is a sealing ring or an O-ring made of rubber or rubber-like materials, which is installed on the outer wall of the conduit 21 or the inner wall of the second through hole 12, and the sealing effect is achieved through compression and elastic deformation. The metal seal is a gasket or filler made of metal, which is placed between the outer wall of the conduit 21 and the second through hole 12, and the sealing effect is achieved through the deformation of the metal gasket or the filling of the filler. The threaded seal is achieved by tightly fitting the threaded structure on the outer wall of the conduit 21 and the inner wall of the second through hole 12 so that they are engaged with each other to form a sealing effect. The welding seal is to weld or sinter the outer wall of the conduit 21 and the inner wall of the second through hole 12 at high temperature to form a permanent sealed connection. As Figure 1As shown, the outer wall of the conduit 21 is provided with an annular groove, and a second sealing member 23 is provided in the annular groove. The conduit 21 is sealed and connected with the second through hole 12 through the second sealing member 23. Preferably, the second sealing member 23 is a sealing ring made of rubber or rubber-like material. Through the sealed connection between the outer wall of the conduit 21 and the second through hole 12, gas leakage can be effectively prevented, the effectiveness of the gas replenishment channel can be ensured, and the good sealing of the crankcase 40 can be maintained. At the same time, when maintenance or replacement is required, it is only necessary to release the connection between the conduit 21 and the second through hole 12, and the operation can be carried out conveniently, reducing the time and labor costs during the maintenance process.

[0054] On the basis of the above embodiment, the conduit 21 extends to the bottom of the timing cover 10 and is connected to the cavity. In the present application, the timing cover 10 is located above the oil pan 50, that is, the bottom end of the conduit 21 is located above the oil to be tested. The conduit 21 provides a safe and convenient connection structure for the oil dipstick 20, so that the oil dipstick 20 can be accurately inserted into the oil pan 50 to measure the amount of oil. The end of the conduit 21 is located above the oil to be tested, does not occupy the volume of the oil, and ensures the accuracy of the measurement. At the same time, the air supply channel can be extended so that the introduced air can be preheated as efficiently as possible, reducing the temperature difference between the fresh air and the gas inside the crankcase 40, avoiding the sharp temperature change between the cold and the hot, and reducing the formation of condensed water. By preheating the fresh air, its temperature is close to the internal temperature of the crankcase 40, reducing the generation of condensed water. In addition, the outlet end of the extended conduit 21 is closer to the crankcase 40, realizing the efficient introduction of fresh air.

[0055] The present application also provides an engine, a crankcase and the above-mentioned timing cover 10 , wherein the timing cover 10 is connected to the crankcase 40 .

[0056] In some embodiments of the present application, the timing cover 10 includes a cover body, the inner side of which is connected to the crankcase 40 and defines a cavity for accommodating blowby gas, the cover body includes a first through hole 11 for replenishing air to the cavity and a second through hole 12 for installing the oil dipstick 20, the second through hole 12 runs through the inner and outer sides of the cover body, the first through hole 11 has a first end 111 and a second end 112, the first end 111 is connected to the outside to receive external air, the second end 112 is connected to the second through hole 12, and the first through hole 11 is connected to the cavity through the second through hole 12. In the engine, the oil pan 50 is located below the timing cover 10 and the crankcase 40. Under normal working conditions, the bottom end of the oil dipstick 20 is located inside the oil pan 50. The scale mark or liquid level line on the oil dipstick 20 will show the actual height of the oil in the oil pan 50, thereby determining the amount of oil in the oil pan 50. In this embodiment, the engine oil plays a lubricating role in the engine. The friction of the internal parts of the engine will generate heat, which will be transferred to the engine oil. The engine oil cools the engine by absorbing and transferring heat.

[0057] The engine also includes an oil dipstick 20, which is inserted into the second through hole 12. Along the length direction of the second through hole 12, the top of the oil dipstick 20 is sealed and connected to the second through hole 12. Along the length direction of the oil dipstick 20, the bottom end of the second through hole 12 is spaced apart from the oil dipstick 20 (that is, the middle part of the oil dipstick 20 is spaced apart from the second through hole 12), and the bottom end of the oil dipstick 20 extends into the oil pan. It can be seen from the above embodiment that a conduit 21 is provided in the second through hole 12, and the outer wall of the oil dipstick 20 is spaced apart from the inner wall of the conduit 21. In the present embodiment, the oil dipstick 20 includes an oil dipstick body and an oil dipstick handle. The oil dipstick handle is sealed and connected to the second through hole 12, and the end of the oil dipstick body away from the oil dipstick handle extends into the engine oil to be tested. The seal between the oil dipstick handle and the second through hole 12 may be one or more of a rubber seal, a metal seal, a threaded seal, and a welding seal. Figure 1As shown, the outer wall of the dipstick handle is provided with an annular groove, and a first seal 22 is provided in the annular groove. The dipstick handle is sealed and connected with the second through hole 12 through the first seal 22. Preferably, the first seal 22 is a sealing ring made of rubber or rubber-like material. The diameter of the dipstick handle is larger than the diameter of the dipstick body. The large diameter of the dipstick handle is convenient for the installation of the dipstick and provides conditions for the sealed connection of the dipstick. The relative sealing of the cavity is ensured by the sealed connection between the dipstick handle and the second through hole 12. The upright posture of the dipstick 20 can be maintained by the sealed connection between the dipstick handle and the second through hole 12 to avoid excessive tilting during measurement and affect the accuracy of the measurement result. It can be understood that the port connecting the first through hole 11 and the second through hole 12 is located below the dipstick handle, that is, the part where the first through hole 11 is not sealed and connected with the dipstick 20 in the second through hole 12, so that air can smoothly enter the second through hole 12 from the first through hole 11. The bottom end of the dipstick 20 extends into the oil pan 50 and is inserted into the oil. The scale mark or liquid level line on the dipstick 20 will show the actual height of the oil in the oil pan 50, and then determine the amount of oil in the oil pan 50. The dipstick 20 is usually made of metal and has good thermal conductivity. As the temperature of the oil increases, the temperature of the dipstick 20 will also increase. When the outside air introduced by the one-way valve 30 flows through the first through hole 11, it exchanges heat with the oil dipstick 20 with a higher temperature, thereby reducing the internal temperature of the engine and preheating the fresh air.

[0058] In some embodiments of the present application, a cylinder head, a cylinder head cover and an intake system are also included. The cylinder head cover, the cylinder head and the crankcase 40 are arranged in sequence in the up-down direction. A ventilation channel is provided on the cylinder head cover, wherein the inlet end of the ventilation channel is connected to the cavity, and the outlet end is connected to the intake end of the intake system. In the present application, the intake system is used to introduce air and transport it to the engine cylinder for combustion. In the application, the intake system is located at the top or side of the engine, close to the cylinder block and the cylinder head cover. A ventilation channel is provided on the cylinder head cover, wherein the inlet end of the ventilation channel is connected to the cavity, and the outlet end is connected to the intake end of the intake system.

[0059] In the engine of the present application, by adding fresh air to the crankcase 40, the oxygen content in the crankcase 40 can be increased, thereby improving the combustion process, helping to improve the engine combustion efficiency, increasing power output, and thus improving the performance and driving force of the engine. The crankcase air supply system can help effectively control the gas pressure in the crankcase 40 to avoid the negative impact of excessive or low gas pressure on the engine. Providing an appropriate amount of fresh air through the air supply system helps to maintain the normal working state of the engine and improve its reliability and durability. The crankcase air supply system promotes smoother discharge of exhaust gas in the crankcase 40, reduces corrosion and damage to the crankcase 40 and internal components by pollutants, and extends the life of the engine. The crankcase air supply system avoids the generation of condensed water by preheating the introduced fresh air, keeps the inside of the crankcase 40 clean and operating normally, and extends the life of the engine.

[0060] The present application also provides a vehicle using the above-mentioned engine.

[0061] In the vehicle of the present application, the use of an engine with the above-mentioned timing cover can provide higher fuel economy, optimize combustion efficiency, increase power output, and the vehicle consumes less fuel under the same driving conditions, thereby reducing fuel costs and reducing carbon emissions. The setting of the timing cover ventilation structure improves the airflow of the engine, provides a more adequate oxygen supply, and can enhance the driving force and power of the vehicle. The setting of the timing cover ventilation structure helps to keep the inside of the engine clean and healthy, helps to reduce the risk of engine wear and failure, and extends the service life of the engine. By improving power output and response performance, the vehicle can more easily cope with various driving conditions, and is smoother and smoother during starting, acceleration and driving, which increases driving comfort and pleasure.

[0062] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "setting" appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0063] The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present application to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed in the present application.

Claims

1. A timing cover, used to connect with a crankcase, characterized in that: include: A cover body, the cover body comprising an inner side and an outer side, the inner side being connected to the crankcase and defining a cavity for accommodating blow-by gas; wherein, The cover body has a first through hole for replenishing air into the cavity, the first through hole has a first end and a second end, the first end is connected to the outside to receive external air, and the second end is connected to the inside to replenish air into the cavity.

2. The timing cover according to claim 1, characterized in that: It also includes a one-way valve, which is arranged in the first through hole.

3. The timing cover according to claim 1, characterized in that: The cover body has a second through hole for installing the oil dipstick, and the second through hole passes through the inner side and the outer side of the cover body; wherein, The second through hole is communicated with the second end portion, and the second end portion is communicated with the cavity through the second through hole.

4. The timing cover according to claim 3, characterized in that: The timing cover includes a first portion and a second portion spaced apart in the up-down direction, the first portion being used to connect with the cylinder head, the second portion being used to connect with the crankcase, and the inner side of the second portion and the crankcase defining a cavity for accommodating blowby gas; The first through hole and the second through hole are both provided in the first portion; The timing cover further comprises a conduit located inside the cover body, one end of the conduit is inserted into the second through hole, and the other end of the conduit extends to the inner side of the second part.

5. The timing cover according to claim 4, characterized in that: The second through hole is disposed at the top of the first portion and penetrates the first portion in an up-down direction.

6. The timing cover according to claim 5, characterized in that: Along the length direction of the second through hole, the conduit is lower than the second opening.

7. The timing cover according to claim 5, characterized in that: The outer wall of the conduit is sealed and connected to the second through hole.

8. An engine, characterized in that: The invention comprises a crankcase and the timing cover according to any one of claims 1 to 7, wherein the timing cover is connected to the crankcase.

9. The engine according to claim 8, characterized in that The timing cover comprises a cover body, the inner side of which is connected to the crankcase and defines a cavity for accommodating blow-by gas, the cover body comprises a first through hole for replenishing gas to the cavity and a second through hole for installing an oil dipstick, the second through hole passes through the inner side and the outer side of the cover body, the first through hole has a first end and a second end, the first end is connected to the outer side to receive external air, the second end is connected to the second through hole, and the first through hole is connected to the cavity through the second through hole; The engine further comprises an oil dipstick, which is inserted into the second through hole. Along the length direction of the second through hole, the top end of the oil dipstick is sealed and connected to the second through hole.

10. The engine according to claim 8, characterized in that It also includes a cylinder head, a cylinder head cover and an intake system, wherein the cylinder head cover, the cylinder head and the crankcase are arranged in sequence in the up and down direction, and a ventilation channel is opened on the cylinder head cover, wherein: The inlet end of the ventilation channel is connected to the cavity, and the outlet end is connected to the air intake end of the air intake system.

11. A vehicle, characterized in that: Comprising an engine according to any one of claims 8 to 10.

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