Camshaft housing, engine and vehicle

Abstract

A vehicle is provided, and includes an engine having a camshaft housing. The camshaft housing includes: an ignition coil mounting hole, where the ignition coil mounting hole is configured to mount an ignition coil, the ignition coil mounting hole includes a sealing section located at an upper portion thereof, and an inner wall of the sealing section is adapted to be fitted with the ignition coil; and an exhaust hole, where the exhaust hole is provided in a side wall of the ignition coil mounting hole, the exhaust hole is located on a lower side of the sealing section, and the exhaust hole communicates with the outside.

Description

[0001] This application claims priority to Chinese Patent Application No. 202311433842.1, filed with the China National Intellectual Property Administration on October 31, 2023 and entitled "CAMSHAFT HOUSING, ENGINE, AND VEHICLE", which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] The present invention relates to the field of vehicle technologies, and more specifically, to a camshaft housing, an engine, and a vehicle.BACKGROUND

[0003] In an ignition system of a vehicle, an ignition coil is a conversion component that provides ignition energy for igniting an air-fuel mixture in a cylinder of an engine. The ignition coil is manufactured based on a principle of electromagnetic induction and can convert a low voltage into a high voltage. The high voltage is turned into a high-voltage spark by using a spark plug to ignite a combustible mixture.

[0004] As a peripheral part of the engine, the ignition coil needs to prevent external liquid from entering the engine and causing corrosion on internal parts of the engine, while ensuring balance of air pressure inside and outside the engine. An exhaust hole is provided on a cover plate of an upper rod portion of the ignition coil, which can achieve sealing and waterproofing effects to some extent. However, current exhaust holes usually have poor exhaust performance.SUMMARY

[0005] A series of concepts in a simplified form are introduced in the SUMMARY, which are further described in detail in the DESCRIPTION OF EMBODIMENTS. The SUMMARY of the present invention neither means an attempt to define a key feature and a necessary technical feature of the technical solutions claimed for protection, nor means an attempt to determine the protection scope of the technical solutions claimed for protection.

[0006] In view of the disadvantages of the prior art, a first aspect of an embodiment of the present invention provides a camshaft housing. The camshaft housing includes: an ignition coil mounting hole, wherein the ignition coil mounting hole is configured to mount an ignition coil, the ignition coil mounting hole including a sealing section located at an upper portion thereof, and an inner wall of the sealing section being adapted to be fitted with the ignition coil; and an exhaust hole, wherein the exhaust hole is provided on a side wall of the ignition coil mounting hole, the exhaust hole being located on a lower side of the sealing section, and the exhaust hole communicating with the outside.

[0007] In an embodiment, a top of the ignition coil mounting hole protrudes from an upper surface of the camshaft housing to form a boss, the exhaust hole is provided on the boss, and the exhaust hole communicates with the outside.

[0008] In an embodiment, a waterproof and breathable membrane is disposed in the exhaust hole.

[0009] In an embodiment, the camshaft housing includes a plurality of ignition coil mounting holes, and the plurality of ignition coil mounting holes are arranged along a straight line; and the exhaust holes of the plurality of ignition coil mounting holes communicate with each other, and at least one of the exhaust holes communicates with the outside.

[0010] In an embodiment, the camshaft housing includes the plurality of ignition coil mounting holes, and the plurality of ignition coil mounting holes are arranged along the straight line; and the camshaft housing is further provided with an exhaust channel, the exhaust channel being connected to the exhaust holes of the plurality of ignition coil mounting holes, and each of the exhaust holes communicating with the outside through the exhaust channel.

[0011] In an embodiment, the exhaust channel is provided in the camshaft housing.

[0012] In an embodiment, a surface of the camshaft housing is provided with a protrusion structure, the ignition coil mounting hole is provided on the surface of the camshaft housing, and the exhaust channel is provided in the protrusion structure.

[0013] In an embodiment, the top of the ignition coil mounting hole protrudes from the upper surface of the camshaft housing to form the boss, and the exhaust hole is provided on the boss.

[0014] In an embodiment, a width of the ignition coil mounting hole gradually decreases from top to bottom.

[0015] Another aspect of an embodiment of the present invention provides an engine. The engine includes the foregoing camshaft housing.

[0016] In an embodiment, the engine further includes an ignition coil, the ignition coil includes a wiring terminal, the wiring terminal is inserted into the ignition coil mounting hole, a sealing ring is disposed on the wiring terminal, and the sealing ring is fitted with an inner wall of the sealing section.

[0017] Still another aspect of an embodiment of the present invention provides a vehicle, and the vehicle includes the foregoing engine.BRIEF DESCRIPTION OF DRAWINGS

[0018] The foregoing and other objectives, features, and advantages of the present invention will become more apparent from a more detailed description of embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are intended to provide a further understanding of the embodiments of the present invention and constitute a part of the specification, and are used, together with the embodiments of the present invention, to explain the present invention, but do not constitute a limitation on the present invention. In the drawings, same reference numerals indicate same components or steps. FIG. 1 is a sectional view of a camshaft housing according to an embodiment of the present invention. FIG. 2 is a three-dimensional diagram of a camshaft housing according to an embodiment of the present invention. FIG. 3 is a main view and sectional view of an ignition coil according to an embodiment of the present invention. FIG. 4 is a sectional view of a camshaft housing according to another embodiment of the present invention. FIG. 5 is a three-dimensional diagram of a camshaft housing according to another embodiment of the present invention. DESCRIPTION OF EMBODIMENTS

[0019] To make objectives, technical solutions, and advantages of this application clearer, the following describes example embodiments of this application in detail with reference to the accompanying drawings. It will be apparent that the described embodiments are merely a part rather than all of embodiments of this application. It will be understood that this application is not limited to the example embodiments described herein. All other embodiments obtained by a person skilled in the art based on embodiments of this application without creative efforts shall fall within the protection scope of this application.

[0020] In the following descriptions, a lot of specific details are given to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application may be implemented without one or more of these details. In other examples, to avoid confusion with this application, some technical features known in the art are not described.

[0021] It will be understood that this application can be implemented in different forms and will not be construed as being limited to embodiments described herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and the scope of this application is fully conveyed to a person skilled in the art.

[0022] Terms used herein are intended to describe specific embodiments only and are not intended to limit this application. As used herein, singular forms as described by "a", "an", and "the / this" are intended to also include plural forms, unless otherwise clearly stated in the context. It will be further understood that the terms "consist" and / or "include", when used in the specification, specify presence of the features, integers, steps, operations, elements, and / or components, but does not exclude presence or addition of one or more other features, integers, steps, operations, elements, components, and / or their groups. As used herein, the term "and / or" includes any and all combinations of related enumerated items.

[0023] For a thorough understanding of this application, detailed structures are provided in the following descriptions, to explain the technical solution proposed in this application. Optional embodiments of this application are described in detail below. However, in addition to these detailed descriptions, this application may have other implementations.

[0024] In order to exhaust blow-by gas at an ignition coil mounting hole while ensuring sealing performance, an implementation solution is that a vent hole is provided on a sealing ring of an ignition coil, and a vent groove is provided on a cover plate of the ignition coil, which can achieve sealing and waterproofing effects to some extent. However, exhaust gas needs to pass through the sealing ring, which is likely to affect the performance of gas exhausting. In addition, after accumulated water on a camshaft housing cover submerges the cover plate of the ignition coil, the accumulated water flows into the ignition coil mounting hole through the vent hole. Therefore, once the accumulated water is present, the ignition coil is highly susceptible to being damaged by corrosion.

[0025] In view of the above problem that accumulated water is present on the camshaft housing cover, a solution is to provide a drain groove on the camshaft housing cover, so that the accumulated water bypasses a plurality of bosses from a front end to the drain groove. This enables convenient and rapid drainage of accumulated water at the top of an engine, and prevents the accumulated water from entering the ignition coil mounting hole and further extending into a combustion chamber. However, in this solution, when the ignition coil is not mounted, the accumulated water at the top can be smoothly discharged through the drain groove. Nevertheless, after the ignition coil is mounted, the cover plate of the ignition coil will occupy remaining drainage space, which is likely to cause poor drainage or even no drainage from a rear end to a front end. When an amount of increased accumulated water is greater than a discharge capacity of the drain groove, the accumulated water level inevitably rises. As a result, the accumulated water can be easily sucked back into the combustion chamber through the exhaust hole of the ignition coil.

[0026] Embodiments of the present invention propose a camshaft housing, an engine, and a vehicle, to at least partially solve the foregoing problems. The camshaft housing, the engine, and the vehicle proposed by the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0027] As shown in FIG. 1 to FIG. 5, a camshaft housing 10 according to an embodiment of the present invention includes: an ignition coil mounting hole 11, wherein the ignition coil mounting hole 11 is configured to mount an ignition coil 20, the ignition coil mounting hole 11 includes a sealing section 16 located at an upper portion thereof, and the ignition coil 20 is adapted to be fitted with an inner wall of the sealing section 16; and an exhaust hole 13, wherein the exhaust hole 13 is provided on a side wall of the ignition coil mounting hole 11, the exhaust hole 13 is located on a lower side of the sealing section 16, and the exhaust hole 13 communicates the ignition coil mounting hole 11 with the outside, so as to maintain the balance of internal and external air pressure.

[0028] In the embodiment of the present invention, the exhaust hole 13 is provided at the lower side of the sealing section 16 of the ignition coil mounting hole 11, and exhaust gas does not need to pass through the sealing section 16, so that gas exhausting is smoother. The sealing section 16 can be configured to be fitted with the ignition coil 20 to seal the ignition coil mounting hole 11, thereby ensuring sealing effects and waterproofing effects.

[0029] For example, a top of the ignition coil mounting hole 11 protrudes from an upper surface of the camshaft housing 10 to form a boss 12. The ignition coil 20 includes a wiring terminal 21 and a cover plate 22 disposed at the top of the wiring terminal 21. The wiring terminal 21 is inserted into the ignition coil mounting hole 11, and the cover plate 22 covers the boss 12. A sealing ring 23 is disposed at a position of the wiring terminal 21 close to the top. The sealing section 16 is disposed at the upper portion of the ignition coil mounting hole 11, and the sealing ring 23 is fitted with the sealing section 16, to seal the ignition coil mounting hole 11.

[0030] For example, as shown in FIG. 3, the cover plate 22 of the ignition coil 20 has a flanged lip, and the flanged lip is in an interference fit with the boss 12 of the ignition coil mounting hole 11. The sealing ring 23 is disposed at a position of the wiring terminal 21 of the ignition coil 20 close to the top. The sealing ring 23 is in an interference fit with the inner wall of the sealing section 16 of the ignition coil mounting hole 11, and two waterproof structures jointly prevent the accumulated water from entering the ignition coil mounting hole 11. The cover plate 22 and the sealing ring 23 according to the embodiment of the present invention are both of an integral sealing structure, and there is no need to provide a vent hole or a vent groove, thereby ensuring full sealing performance of the ignition coil 20.

[0031] For example, there are at least two sealing rings 23. For example, three sealing rings are provided in the example of FIG. 1. The at least two sealing rings 23 can further improve the sealing effects.

[0032] For example, a width of the ignition coil mounting hole 11 gradually decreases from top to bottom, that is, a side wall of the ignition coil mounting hole is disposed obliquely, and a shape of a longitudinal section thereof is similar to a V-shape. The ignition coil mounting hole 11 of this shape has a large opening to facilitate mounting of the ignition coil 20.

[0033] In an embodiment, as shown in FIG. 1 and FIG. 2, the exhaust hole 13 is provided on the boss 12, and an air outlet of the exhaust hole 13 communicates with the outside. In this embodiment, the height of the boss 12 is increased, so that the position of the sealing ring 23 is raised, and layout space is reserved for the exhaust hole 13 below the sealing ring 23. The exhaust hole 13 extends through a side wall of the boss 12, one end of the exhaust hole 13 is connected to the inside of a cylinder, and the other end of the exhaust hole 13 communicates with the outside, so as to exhaust the blow-by gas inside the cylinder to the atmosphere and maintain balance of air pressure inside and outside the engine.

[0034] In this embodiment, the blow-by gas is exhausted without passing through the sealing ring 23, and gas exhausting is smoother, thereby effectively preventing the ignition coil 20 from being detached due to excessive gas pressure. In addition, the vent groove on the cover plate 22 of the ignition coil 20 and the vent hole on the sealing ring 23 are eliminated, preventing the accumulated water from entering the engine through the vent groove and vent hole of the ignition coil, which otherwise would cause misfire, vibration or corrosion of the ignition coil. Moreover, the presence of the boss 12 allows the raised positions of the ignition coil 20 and the exhaust hole 13, further preventing the accumulated water on the upper portion of the camshaft housing 10 from entering the engine through the exhaust hole 13, and preventing the accumulated water from being sucked back into the ignition coil mounting hole 11 and endangering a spark plug body.

[0035] Further, a waterproof and breathable membrane 14 is further disposed in the exhaust hole 13. The waterproof and breathable membrane 14 may be of any breathable and waterproof semi-permeable membrane structure, so that the blow-by gas of the cylinder can pass through the waterproof and breathable membrane 14 to the atmosphere, and can prevent the accumulated water on the upper portion of the camshaft housing 10 from entering the engine through the exhaust hole 13, and prevent the accumulated water from being sucked back into the ignition coil mounting hole 11 and endangering a spark plug body.

[0036] For example, referring to FIG. 1, the exhaust hole 13 may have a two-section design. A first-section exhaust hole close to an inner side and a second-section exhaust hole close to an outer side have different diameters, and a diameter of the first-section exhaust hole is less than a diameter of the second-section exhaust hole. The waterproof and breathable membrane 14 is disposed at the bottom of the second-section exhaust hole, so as to facilitate fixing the position of the waterproof and breathable membrane 14.

[0037] In some embodiments, the camshaft housing 10 includes a plurality of ignition coil mounting holes 11, and the plurality of ignition coil mounting holes 11 are arranged along a straight line. For example, each ignition coil mounting hole 11 is provided with at least one exhaust hole 13, and the exhaust holes 13 of the plurality of ignition coil mounting holes 11 are provided at a same position.

[0038] In an example, as shown in FIG. 4, the exhaust holes of the plurality of ignition coil mounting holes communicate with each other, and at least one of the exhaust holes communicates with the outside. In the example of FIG. 4, each ignition coil mounting hole 11 is provided with two exhaust holes 13, the two exhaust holes 13 are provided opposite to each other and both communicate with the exhaust holes 13 of the adjacent ignition coil mounting hole 11, so that a plurality of exhaust holes are connected in series to each other. Finally, the exhaust gas from the plurality of ignition coil mounting holes 11 is uniformly exhausted through the exhaust hole communicating with the outside. Since most of the exhaust holes 13 do not directly communicate with the outside, better waterproofing effects are achieved.

[0039] In the example of FIG. 4, the height of the boss 12 may be lowered so that the sealing ring 23 and the exhaust hole 13 are located below the boss, so that the plurality of exhaust holes 13 may communicate with each other inside the camshaft housing 10. In some embodiments, the camshaft housing 10 is further provided with an exhaust channel 15. The exhaust holes 13 of the plurality of ignition coil mounting holes 11 are connected to the exhaust channel 15 to exhaust gas through the exhaust channel 15 instead of directly communicating with the outside, thereby further preventing the accumulated water from entering the camshaft housing 10 through the exhaust holes 13. The blow-by gas from each cylinder directly enters the exhaust channel 15 and is exhausted through the exhaust channel 15, and there is no need to reserve the exhaust hole on the ignition coil 20, thereby achieving the full sealing performance of the ignition coil.

[0040] In an example, as shown in FIG. 5, the exhaust channel 15 is provided on a surface of the camshaft housing 10. Specifically, the surface of the camshaft housing 10 is provided with the protrusion structure, the ignition coil mounting hole is provided on the surface of the camshaft housing 10, and the exhaust channel 15 is provided in the protrusion structure. The protrusion structure may be a pipe mounted or formed on the surface of the camshaft housing 10, for example, a circular pipe shown in FIG. 5. The provision of the exhaust channel 15 on the surface of the camshaft housing 10 reduces the machining difficulty compared with the provision of the exhaust channel 15 in the camshaft housing 10. For example, an exhaust end of the exhaust channel 15 is disposed at a rear end of the camshaft housing 10, thereby discharging the blow-by gas from the rear end of the camshaft housing 10 to the atmosphere.

[0041] When the exhaust channel 15 is provided on the surface of the camshaft housing 10, the exhaust hole 13 may be provided on the boss 12, and the exhaust channel 15 may be provided on one side of one or more bosses 12, so that the exhaust holes 13 of one or more ignition coil mounting holes 11 are connected to a same side of the exhaust channel 15. In this embodiment, the exhaust channel 15 is connected in parallel to the exhaust holes 13 of the plurality of ignition coil mounting holes 11. The blow-by gas from each ignition coil mounting hole 11 does not pass through other ignition coil mounting holes 11, but enters the exhaust channel 15 independently. Even if the exhaust of the blow-by gas from one cylinder is blocked, the exhaust of the blow-by gas from other cylinders will not be affected.

[0042] For example, the exhaust channel 15 may also be provided at other positions of the camshaft housing. For example, the exhaust channel may also be provided in the camshaft housing, and the plurality of ignition coil mounting holes 11 are connected in parallel inside the camshaft housing.

[0043] In summary, for the camshaft housing according to the embodiment of the present invention, the exhaust hole is provided at the lower side of the sealing section 16 of the ignition coil mounting hole, and no exhaust hole is provided on the ignition coil, which can ensure the sealing performance of the ignition coil mounting hole. The exhaust gas does not need to pass through the sealing section 16, so that gas exhausting is smoother.

[0044] Another aspect of an embodiment of the present invention provides an engine, and the engine includes the foregoing camshaft housing and the foregoing ignition coil. The camshaft housing is mounted on a cylinder of the engine, seals the cylinder from above and encloses the upper cavity of the engine, which can prevent external impurities and the like from entering the engine, and prevents internal engine oil from leaking. The ignition coil is a conversion component that provides ignition energy for igniting an air-fuel mixture in the cylinder of the engine, which can convert a low voltage into a high voltage. The high voltage is turned into a high-voltage spark by using a spark plug to ignite a combustible mixture.

[0045] Specifically, the camshaft housing is provided with the ignition coil mounting hole. The ignition coil mounting hole is configured to mount the ignition coil, the ignition coil mounting hole includes the sealing section 16, and the ignition coil is fitted with the sealing section 16. The exhaust hole is provided on the side wall of the ignition coil mounting hole, the exhaust hole is located on the lower side of the sealing section 16, and the ignition coil mounting hole communicates with the outside.

[0046] For example, the top of the ignition coil mounting hole protrudes from the upper surface of the camshaft housing to form the boss. The ignition coil includes a wiring terminal, and the wiring terminal is inserted into the ignition coil mounting hole. The sealing ring is disposed at the position of the wiring terminal close to the top, and the sealing ring is in an interference fit with the inner wall of the sealing section 16 of the ignition coil mounting hole. Further, the ignition coil further includes the cover plate disposed at the top of the wiring terminal, and the cover plate covers the boss.

[0047] In an embodiment, the exhaust hole is provided on the boss, and the air outlet of the exhaust hole communicates with the outside.

[0048] In an embodiment, the waterproof and breathable membrane is disposed in the exhaust hole, and the waterproof and breathable membrane is configured to prevent the accumulated water from entering the ignition coil mounting hole via the exhaust hole while exhausting gas.

[0049] In another embodiment, the camshaft housing is further provided with the exhaust channel, the exhaust hole is connected to the exhaust channel, and the gas is exhausted through the exhaust channel, thereby further preventing the accumulated water from entering the exhaust hole. The exhaust channel may be provided in the camshaft housing, or the surface of the camshaft housing is provided with the protrusion structure. The exhaust channel is provided in the protrusion structure, and the plurality of ignition coil mounting holes are connected from a side surface.

[0050] In another embodiment, the camshaft housing includes the plurality of ignition coil mounting holes, and the plurality of ignition coil mounting holes are arranged along the straight line; and the exhaust holes of the plurality of ignition coil mounting holes communicate with each other, and at least one of the exhaust holes communicates with the outside.

[0051] As the engine according to the embodiment of the present invention has the foregoing camshaft housing, performance of gas exhausting through the exhaust hole can be improved.

[0052] Still another aspect of an embodiment of the present invention provides a vehicle, and the vehicle includes the foregoing engine. The vehicle according to the embodiment of the present invention also has similar advantages due to the use of the foregoing engine.

[0053] Although example embodiments have been described herein with reference to the accompanying drawings, it will be understood that the foregoing example embodiments are merely examples and are not intended to limit the scope of this application thereto. A person of ordinary skill in the art can make various modifications and variations to this application without departing from the spirit and the scope of this application. All these modifications and variations are intended to be included within the scope of this application defined by the appended claims.

[0054] A person of ordinary skill in the art may be aware that, in conjunction with the examples described in embodiments disclosed herein, units and algorithm steps may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on specific applications and design constraints of the technical solutions. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation shall not be construed as exceeding the scope of this application.

[0055] In the several embodiments provided in this application, it will be understood that the disclosed devices and methods may be implemented in other manners. For example, the described device embodiment is merely an example. For example, the unit division is merely logical function division and may be other division in actual implementation. For example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted or not performed.

[0056] Many specific details are set forth in the specification. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail, in order not to obscure understanding of the specification.

[0057] Similarly, it will be understood that in order to simplify this application and aid in understanding one or more of the various disclosed aspects, in the description of example embodiments of this application, various features of this application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of this application shall not be interpreted as reflecting the following intention that the claimed application requires more features than are specifically described in each claim. More precisely, as reflected in the corresponding claims, the present invention lies in that the corresponding technical problems may be solved with fewer than all features of a single disclosed embodiment. Thus, the claims following the specific implementations are hereby expressly incorporated into these specific implementations, and each claim stands as an independent embodiment of this application.

[0058] A person skilled in the art will understand that, except where features are mutually exclusive, all features disclosed in the specification (including the attendant claims, abstract and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Each feature disclosed in the specification (including the attendant claims, abstract and drawings) may be replaced by an alternative feature serving the same, equivalent or similar purpose, unless specifically noted otherwise.

[0059] Furthermore, a person skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but exclude other features, combination of features from different embodiments is intended to fall within the scope of this application and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0060] The various component embodiments of this application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. A person skilled in the art will understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some modules according to the embodiments of this application. This application may also be implemented as apparatus programs (for example, a computer program and a computer program product) for executing a part or all of the methods described herein. Such programs for implementing this application may be stored on a computer-readable medium, or may have the form of one or more signals. Such a signal may be downloaded from an Internet website, or provided on a carrier signal, or in any other form.

[0061] It will be noted that the foregoing embodiments illustrate rather than limit this application and that a person skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference sign placed between parentheses shall not be construed as limitation on the claims. This application may be implemented by hardware including several different elements, and by a suitably programmed computer. In the unit claim enumerating several apparatuses, some of these apparatuses may be embodied by a same hardware item. The terms "first", "second", "third", and the like used are not intended to indicate any order. These words may be interpreted as names.

[0062] The foregoing descriptions are merely specific implementations of this application or descriptions for the specific implementations, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. The protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. A camshaft housing (10), wherein the camshaft housing comprises: an ignition coil mounting hole (11), the ignition coil mounting hole being configured to mount an ignition coil (20), the ignition coil mounting hole comprising a sealing section (16) located at an upper portion thereof, and an inner wall of the sealing section being adapted to be fitted with the ignition coil; and an exhaust hole (13), the exhaust hole being provided on a side wall of the ignition coil mounting hole, the exhaust hole being located on a lower side of the sealing section, and the exhaust hole communicating with the outside.

2. The camshaft housing according to claim 1, wherein a top of the ignition coil mounting hole protrudes from an upper surface of the camshaft housing to form a boss (12), the exhaust hole is provided on the boss, and the exhaust hole communicates with the outside.

3. The camshaft housing according to claim 1 or 2, wherein a waterproof and breathable membrane (14) is disposed in the exhaust hole.

4. The camshaft housing according to any one of claims 1 to 3, wherein the camshaft housing comprises a plurality of ignition coil mounting holes, and the plurality of ignition coil mounting holes are arranged along a straight line; and the exhaust holes of the plurality of ignition coil mounting holes communicate with each other, and at least one of the exhaust holes communicates with the outside.

5. The camshaft housing according to any one of claims 1 to 4, wherein the camshaft housing comprises the plurality of ignition coil mounting holes, and the plurality of ignition coil mounting holes are arranged along the straight line; and the camshaft housing is further provided with an exhaust channel (15), the exhaust channel is connected to the exhaust holes of the plurality of ignition coil mounting holes, and each of the exhaust holes communicates with the outside through the exhaust channel.

6. The camshaft housing according to any one of claims 1 to 5, wherein the exhaust channel is provided in the camshaft housing.

7. The camshaft housing according to any one of claims 1 to 6, wherein a surface of the camshaft housing is provided with a protrusion structure, the ignition coil mounting hole is provided on the surface of the camshaft housing, and the exhaust channel is provided in the protrusion structure.

8. The camshaft housing according to any one of claims 1 to 7, wherein the top of the ignition coil mounting hole protrudes from the upper surface of the camshaft housing to form the boss, and the exhaust hole is provided on the boss.

9. The camshaft housing according to any one of claims 1 to 8, wherein a width of the ignition coil mounting hole gradually decreases from top to bottom.

10. An engine, wherein the engine comprises the camshaft housing according to any one of claims 1 to 9.

11. The engine according to claim 10, wherein the engine further comprises an ignition coil, the ignition coil comprises a wiring terminal (21), the wiring terminal is inserted into the ignition coil mounting hole, a sealing ring (23) is disposed on the wiring terminal, and the sealing ring is fitted with an inner wall of the sealing section.

12. A vehicle, wherein the vehicle comprises the engine according to claim 10 or 11.

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