Ignition coil, engine and vehicle

Abstract

The utility model discloses an ignition coil, an engine and a vehicle. The ignition coil comprises a sleeve, a cover body and a sealing piece. The sleeve is installed in an ignition coil containing cavity of the cylinder cover. The cover body is arranged on the sleeve in a covering mode, and an airflow path is formed between the sleeve and the cover body and communicated with the external environment and the ignition coil containing cavity. A sealing element is arranged between the cover body and the sleeve, a plurality of communicating parts are arranged on at least one of the area where the cover body is in contact with the sealing element, the area where the sleeve is in contact with the sealing element and the sealing element, and the communicating parts belong to the part of an airflow path. The communicating parts are sequentially arranged at intervals in the extending direction of the airflow path, and any two adjacent communicating parts are arranged in a staggered mode. When water or impurities enter the ignition coil containing cavity from the communicating parts, the paths formed between the communicating parts prolong the circulation stroke of the water or the impurities, the water or the impurities can be attached to the paths formed between the communicating parts, and therefore the water or the impurities are prevented from entering the ignition coil containing cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an ignition coil, an engine and a vehicle. Background Art

[0002] An ignition coil mounting hole is arranged on the cylinder head of the engine, and the ignition coil is mounted in the ignition coil mounting hole.

[0003] In the related art, since the operating temperature of the engine varies between -40℃ and 130℃, the gas in the ignition coil chamber will continue to shrink and expand with the change of temperature, and an airflow channel needs to be set to discharge the expanded gas to the external environment, so as to ensure the balance of internal and external pressures of the ignition coil chamber. When the engine is immersed in water or soaked in water, water can easily enter the ignition coil chamber along the airflow channel or the matching position between the ignition coil and the cylinder head of the engine, and in serious cases, it can cause problems such as engine flameout. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an ignition coil, an engine and a vehicle, which help water or impurities to adhere to each connecting part on the airflow path, thereby inhibiting water or impurities from entering the ignition coil accommodating chamber.

[0005] An ignition coil according to an embodiment of the first aspect of the utility model includes: a sleeve, a cover body and a sealing member.

[0006] The sleeve is used for being installed in the ignition coil accommodating chamber of the cylinder head of the engine.

[0007] The cover body is disposed on the sleeve, and an airflow path is formed between the sleeve and the cover body, and the airflow path communicates with the external environment and the ignition coil accommodating chamber.

[0008] A seal is provided between the cover and the sleeve, and a plurality of connecting parts are provided on at least one of the area where the cover contacts the seal, the area where the sleeve contacts the seal, and the seal, and the connecting parts are part of the airflow path.

[0009] A plurality of the communication portions are sequentially arranged at intervals along the extension direction of the airflow path, and any two adjacent communication portions are staggered.

[0010] In this embodiment, a seal is sandwiched between the cover body and the sleeve, and a plurality of connecting parts are provided on at least one of the area where the cover body contacts the seal, the area where the sleeve contacts the seal, and the seal. The plurality of connecting parts are arranged in sequence and spaced along the extension direction of the airflow path, and any two adjacent connecting parts are staggered. In this way, the path of the gas passing through each connecting part is extended. When water or impurities enter the ignition coil accommodating chamber from the connecting part, the path formed between each connecting part extends the flow path of water or impurities, which helps water or impurities to adhere to the path formed between each connecting part, thereby inhibiting water or impurities from entering the ignition coil accommodating chamber.

[0011] According to some embodiments of the utility model, a plurality of first sealing portions are provided on the surface of the sleeve facing the cover body, and the plurality of first sealing portions are arranged in sequence and spaced apart along the extension direction of the airflow path. A notch is provided on each of the first sealing portions, and the notch is the connecting portion. The notches on any two adjacent first sealing portions are staggered.

[0012] According to some embodiments of the present invention, the angle between the notches on any two adjacent first sealing portions in the circumferential direction of the sleeve is 180°.

[0013] According to some embodiments of the utility model, the cover body includes a first part, the first part contacts the tube wall of the sleeve, and the outer surface of the tube wall is provided with an annular first sealing part. The outer ring of the first sealing part is interference fit with the first part to form a closed gap space, wherein the notch is connected to the gap space, and the airflow path includes the notch and the gap space.

[0014] According to some embodiments of the present invention, the cover body further includes a second portion in contact with the end surface of the sleeve.

[0015] A communication channel is provided on at least one of the second portion and the sleeve, the communication channel communicates the gap space and the ignition coil accommodating chamber, and the airflow path includes the communication channel.

[0016] According to some embodiments of the utility model, the connecting channel is provided on the end surface, and at least a part of the connecting channel is a labyrinth channel, and the labyrinth channel includes at least one annular groove along the circumference of the sleeve, and / or at least one arc groove.

[0017] According to some embodiments of the present invention, a flow limiting portion is provided on the annular groove or the arc groove.

[0018] According to some embodiments of the present invention, an end surface of the sleeve is sealingly matched with the second part.

[0019] According to some embodiments of the present invention, the ignition coil accommodating cavity of the cylinder head is sealed and matched with the sleeve.

[0020] An engine according to an embodiment of the second aspect of the present invention comprises a cylinder head and the ignition coil of the first aspect.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a schematic front view of a cylinder head of a generator according to an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 AA direction cross-sectional view;

[0025] Figure 3 It is a structural schematic diagram of an ignition coil installed on a cylinder head of a generator according to an embodiment of the utility model;

[0026] Figure 4 yes Figure 3 A magnified schematic diagram of a local F;

[0027] Figure 5 is an axonometric view of an ignition coil according to an embodiment of the utility model;

[0028] Figure 6 yes Figure 5 BB direction cross-sectional view;

[0029] Figure 7 yes Figure 5 CC direction cross-sectional view;

[0030] Figure 8 is an exploded schematic diagram of an ignition coil according to an embodiment of the utility model;

[0031] Fig. 9 yes Figure 8 A magnified schematic diagram of a local G;

[0032] Fig.10 The sleeve according to the embodiment of the utility model is schematically shown in FIG. Figure 1 ;

[0033] Fig.11 yes Fig.10 A schematic diagram of a local area D of FIG.

[0034] Fig.12 The sleeve according to the embodiment of the utility model is schematically shown in FIG. Figure 2 ;

[0035] Fig.13 yes Fig.12 A schematic diagram of the local E of FIG.

[0036] Fig.14 is a top view of a sleeve according to an embodiment of the utility model;

[0037] Ignition coil 100, air flow path 101, ignition coil body 10;

[0038] Cover body 20, first part 21, second part 22;

[0039] The sleeve 30, the gap space 301, the first sealing portion 31, the first upper sealing portion 31a, the first middle sealing portion 31b, the first lower sealing portion 31c, the labyrinth passage 32, the flow limiting portion 321, the breathing passage 33, the third sealing ring 34, the notch 35, the first notch 35a, the second notch 35b, the third notch 35c, the tube wall 36, and the end surface 37;

[0040] Cylinder head 200 and ignition coil accommodating chamber 201 . DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0043] like Figure 1-Figure 14 As shown, an ignition coil 100 according to an embodiment of the first aspect of the utility model comprises:

[0044] The sleeve 30, the cover body 20 and the sealing member.

[0045] The sleeve 30 is used to be installed in the ignition coil accommodating chamber 201 of the cylinder head 200 of the engine. The cover body 20 is covered on the sleeve 30, and an airflow path 101 is formed between the sleeve 30 and the cover body 20, and the airflow path 101 connects the external environment and the ignition coil accommodating chamber 201.

[0046] A seal is provided between the cover 20 and the sleeve 30 , and a plurality of connecting parts are provided on at least one of the contact area between the cover 20 and the seal, the contact area between the sleeve 30 and the seal, and the seal, and the connecting parts belong to the airflow path 101 .

[0047] A plurality of connecting portions are sequentially arranged at intervals along the extending direction of the airflow path 101 , and any two adjacent connecting portions are staggered.

[0048] It should be noted that in practical applications, Figure 1-Figure 3 As shown, the ignition coil 100 includes an ignition coil body 10, a sleeve 30 and a cover 20. Part of the ignition coil body 10 passes through the cover 20 and is disposed in the sleeve 30. The cylinder head 200 of the engine is provided with an ignition coil accommodating chamber 201, and the ignition coil 100 is installed in the ignition coil accommodating chamber 201, that is, the sleeve 30 is installed in the ignition coil accommodating chamber 201.

[0049] In the related art, since the operating temperature of the engine varies between -40°C and 130°C, the gas in the ignition coil accommodating chamber 201 will continue to shrink and expand with the change of temperature, and thus the ignition coil 100 is provided with an air flow path 101 connecting the ignition coil accommodating chamber 201 with the external environment. The air flow path 101 can discharge the gas in the ignition coil accommodating chamber 201 to the external environment, thereby ensuring the internal and external pressure balance of the ignition coil accommodating chamber 201.

[0050] When the engine is immersed in water or soaked in water, water can easily enter the interior of the ignition coil 100 along the breathing hole (i.e., the airflow path 101) or the matching position between the ignition coil 100 and the cylinder head 200 of the engine, and in serious cases, it may cause problems such as engine stalling.

[0051] Based on this, in this embodiment, a seal is provided between the cover 20 and the sleeve 30, and a plurality of connecting parts are provided on at least one of the area where the cover 20 contacts the seal, the area where the sleeve 30 contacts the seal, and the seal. The plurality of connecting parts are sequentially arranged at intervals along the extension direction of the airflow path 101, and any two adjacent connecting parts are staggered.

[0052] For example, a seal is provided between the cover 20 and the sleeve 30, and the seal may be provided with three connecting parts: a first connecting part, a second connecting part and a third connecting part. The first connecting part, the second connecting part and the third connecting part are arranged in sequence along the extension direction of the airflow path 101. Among them, the first connecting line between the first connecting part and the axis of the sleeve 30 and the second connecting line between the second connecting part and the axis of the sleeve 30 form a first angle, and the first connecting part and the second connecting part are connected to each other, so that the gas can flow from the first connecting part to the second connecting part, thereby extending the path of the gas from the first connecting part to the second connecting part. When water or impurities enter the first connecting part, the path from the first connecting part to the second connecting part extends the flow of water or impurities, which helps water or impurities to adhere to the path from the first connecting part to the second connecting part, thereby inhibiting water or impurities from entering the ignition coil accommodating chamber 201.

[0053] Similarly, a second line connecting the second connecting portion and the axis of the sleeve 30 and a third line connecting the third connecting portion and the axis of the sleeve 30 form a second angle. The second angle may be equal to or different from the first angle. The second connecting portion and the third connecting portion are interconnected, so that gas can flow from the second connecting portion to the third connecting portion, thereby extending the path of gas from the second connecting portion to the third connecting portion. When water or impurities enter the second connecting portion, the path from the second connecting portion to the third connecting portion extends the flow of water or impurities, which helps water or impurities to adhere to the path from the second connecting portion to the third connecting portion, thereby inhibiting water or impurities from entering the ignition coil accommodating chamber 201.

[0054] Of course, it is understandable that the sealing member may be provided with 2 connecting parts, 4 connecting parts, 5 connecting parts, ..., and this embodiment does not limit this.

[0055] In summary, in this embodiment, a seal is sandwiched between the cover body 20 and the sleeve 30, and a plurality of connecting parts are provided on the area where the cover body 20 contacts the seal, the area where the sleeve 30 contacts the seal, and at least one of the seal. The plurality of connecting parts are arranged in sequence and spaced along the extension direction of the airflow path 101, and any two adjacent connecting parts are staggered. In this way, the path of the gas passing through each connecting part is extended. When water or impurities enter the ignition coil accommodating chamber 201 from the connecting part, the path formed between the connecting parts extends the flow of water or impurities, which helps water or impurities to adhere to the path formed between the connecting parts, thereby inhibiting water or impurities from entering the ignition coil accommodating chamber 201.

[0056] In detail, Figure 3As shown, an ignition coil accommodating chamber 201 is provided on the cylinder head 200 of the engine, and the ignition coil 100 is installed in the ignition coil accommodating chamber 201. The ignition coil 100 includes an ignition coil body 10, a sleeve 30 and a cover body 20. The ignition coil 100 is installed in the ignition coil accommodating chamber 201, that is, the sleeve 30 of the ignition coil 100 is installed in the ignition coil accommodating chamber 201. Part of the ignition coil body 10 passes through the cover body 20 and is arranged in the sleeve 30.

[0057] like Figure 4 As shown, a plurality of first sealing portions 31 may be provided on the surface of the sleeve 30 facing the cover body 20, and the first sealing portion 31 is the above-mentioned sealing member. The first sealing portion 31 may be made of rubber material, plastic material or other material with good elasticity. The first sealing portion 31 abuts against the cover body 20, and the first sealing portion 31 is deformed so that the cover body 20 and the sleeve 30 are sealed together, that is, a closed gap space 301 is formed between the cover body 20 and the sleeve 30. A notch 35 is provided on each first sealing portion 31, and the notch 35 is the above-mentioned connecting portion. The notch 35 can connect the external environment with the above-mentioned gap space 301. As shown in FIG. Figure 7-Figure 9 As shown, a breathing channel 33 is provided on the sleeve 30 , and the breathing channel 33 can connect the ignition coil accommodating chamber 201 and the above-mentioned gap space 301 .

[0058] When the gas in the ignition coil accommodating chamber 201 continuously shrinks and expands with the change of temperature, the gas in the ignition coil accommodating chamber 201 is discharged to the external environment through the breathing channel 33, the gap space 301, and the gap 35, thereby achieving the balance of the internal and external pressures of the ignition coil accommodating chamber 201. Among them, the breathing channel 33 and the gap space 301 are interconnected, the gap space 301 and the gap 35 are interconnected, and the gap space 301 and the gap 35 constitute the above-mentioned airflow path 101.

[0059] In addition, the first sealing portion 31 abuts against the cover body 20, and the first sealing portion 31 is deformed so that the cover body 20 and the sleeve 30 are sealed together, which can prevent water, impurities, etc. from entering the ignition coil accommodating chamber 201 through the gap between the cover body 20 and the sleeve 30, thereby inhibiting the ignition coil 100 or the ignition coil accommodating chamber 201 from rusting or damage.

[0060] At the same time, the first sealing part 31 and the sleeve 30 are integrally formed, which can reduce the processing difficulty of the first sealing part 31 and help reduce the production cost of the sleeve 30. For example, the sleeve 30 is processed by injection molding, and the first sealing part 31 and the sleeve 30 can be made of rubber materials. The cover body 20 can be made of plastic material.

[0061] Of course, it is understandable that, in some embodiments, a second sealing portion may be provided on the surface of the cover body 20 facing the sleeve 30, the second sealing portion is integrally formed with the cover body 20, and a communication hole or a communication notch 35 is provided on the second sealing portion. In some embodiments, a sealing member is sandwiched between the cover body 20 and the sleeve 30, and a communication hole is provided on the area where the cover body 20 and the sealing member contact, or a communication hole is provided on the area where the sleeve 30 and the sealing member contact.

[0062] Furthermore, the plurality of first sealing portions 31 are sequentially arranged at intervals along the extension direction of the airflow path 101 , and the notches 35 on two adjacent first sealing portions 31 are staggered.

[0063] In a specific embodiment, Figure 6-Figure 12 As shown, the cover body 20 includes a first portion 21 and a second portion 22, wherein the first portion 21 contacts the tube wall 36 of the sleeve 30, and the second portion 22 contacts the end surface 37 (eg, Fig. 9 The first part 21 surrounds the second part 22, and the two are connected to each other.

[0064] Three first sealing portions 31 are provided on the outer surface of the tube wall 36 of the sleeve 30. Each first sealing portion 31 may be annular, and the thickness of the first sealing portion 31 gradually decreases from the inner circle to the outer circle. Fig.10 or Fig.12 As shown, three first sealing parts 31: a first upper sealing part 31a, a first middle sealing part 31b, and a first lower sealing part 31c are arranged in sequence and spaced apart in the vertical direction. It can also be said that the first upper sealing part 31a, the first middle sealing part 31b, and the first lower sealing part 31c are arranged in sequence and spaced apart along the extension direction of the airflow path 101.

[0065] A first notch 35a is provided on the first upper sealing portion 31a, a second notch 35b is provided on the first middle sealing portion 31b, and a third notch 35c is provided on the first lower sealing portion 31c. The first notch 35a and the second notch 35b may be 180° in the circumferential direction of the sleeve 30. Figure 10-13 As shown, the notches 35 on the two adjacent first sealing portions 31 are staggered; the second notch 35b and the third notch 35 may be 180° in the circumferential direction of the sleeve 30, as shown in FIG. Figure 10-13 As shown; that is, the first notch 35a, the second notch 35b, and the third notch 35c are staggered, so that the notches 35 on two adjacent first sealing parts 31 are staggered. The first notch 35a, the second notch 35b, and the third notch 35c form a zigzag airflow passage, which connects the gap space 301 and the external environment. The airflow passage is a part or a section of the above-mentioned airflow path 101.

[0066] The outer ring of the first upper sealing portion 31a is interference fit with the first portion 21 of the cover body 20, the outer ring of the first middle sealing portion 31b is interference fit with the first portion 21 of the cover body 20, and the outer ring of the first lower sealing portion 31c is interference fit with the first portion 21 of the cover body 20, so as to form Figure 4 The gap space 301 is shown. The interference fit between the cover 20 and the sleeve 30 can ensure that the cover 20 is stably connected to the end of the sleeve 30.

[0067] It should be noted that if Figure 4 As shown in FIG9 , the first upper sealing portion 31a, the first middle sealing portion 31b, and the first lower sealing portion 31c divide the gap space 301 into a plurality of sub-gap spaces, and two adjacent sub-gap spaces are connected through a gap. For example, the sub-gap space between the first upper sealing portion 31a and the first middle sealing portion 31b is the first sub-gap space, and the sub-gap space between the first middle sealing portion 31b and the first lower sealing portion 31c is the second sub-gap space, and the second sub-gap space is connected to the first sub-gap space through the second gap 35b on the first middle sealing portion 31b.

[0068] Of course, it is understandable that the first notch 35a and the second notch 35b are 90°, 120°, 150°, ... in the circumferential direction of the sleeve 30, and the second notch 35b and the third notch 35c are 90°, 120°, 150°, ... in the circumferential direction of the sleeve 30, which are not listed one by one in this embodiment.

[0069] With such arrangement, on the one hand, the plurality of first sealing portions 31 can improve the sealing performance between the cover body 20 and the sleeve 30, and further prevent water, impurities, etc. from entering the ignition coil accommodating chamber 201 through the gap between the cover body 20 and the sleeve 30; on the other hand, when water or impurities enter the ignition coil accommodating chamber 201 through the air flow passage, the zigzag-shaped air flow passage prolongs the flow distance of water or impurities, and water or impurities can adhere to the air flow passage, thereby inhibiting water or impurities from entering the ignition coil accommodating chamber 201.

[0070] Of course, it is understandable that a first sealing portion 31 may be provided on the end surface 37 of the sleeve 30 , and those skilled in the art may design the structure of the first sealing portion 31 according to actual conditions, so it will not be described in detail.

[0071] In some embodiments of the present invention, a communication channel is provided on at least one of the second portion 22 and the sleeve 30 , and the communication channel is in communication with the gap space 301 .

[0072] In a specific embodiment, Figure 10-Figure 14As shown, a connecting passage is provided on the end surface 37 of the sleeve 30, and the connecting passage can connect the gap space 301 and the breathing passage 33. Among them, at least part of the connecting passage is a labyrinth passage 32, which prolongs the length of the connecting passage. When water or impurities flow through the airflow passage and enter the ignition coil accommodating chamber 201 through the connecting passage, the connecting passage prolongs the flow path of water or impurities, and water or impurities can adhere to the connecting passage, thereby preventing water or impurities from entering the ignition coil accommodating chamber 201.

[0073] The labyrinth passage 32 includes at least one annular groove and / or at least one arc groove along the circumference of the sleeve 30. Specifically, Fig.14 As shown, the labyrinth passage 32 includes an arc groove and an annular groove, the arc groove and the annular groove are connected to each other, the arc groove is connected to the gap space 301, and the annular groove is connected to the breathing passage 33, so that the labyrinth passage 32 connects the gap space 301 and the breathing passage 33.

[0074] Of course, it is understood that the maze passage 32 may be Fig.14 In addition to the structure shown, other suitable structures may be used, and this embodiment does not limit this.

[0075] Furthermore, a flow limiting portion 321 is provided on the annular groove or the arc groove.

[0076] like Fig.14 As shown, a plurality of flow limiting portions 321 are provided in the extending direction of the annular groove, and a plurality of flow limiting portions 321 are provided in the extending direction of the arc groove. The cross section of the flow limiting portion 321 is smaller than the cross section of the arc groove and the cross section of the annular groove. When water or impurities enter the ignition coil accommodating chamber 201 through the air flow passage and the connecting passage, the flow limiting portion 321 allows the water or impurities to adhere thereto, and the flow limiting portion 321 can inhibit the water or impurities from continuing to enter the ignition coil accommodating chamber 201, and further inhibit the water or impurities from entering the ignition coil accommodating chamber 201.

[0077] It should be noted that, in addition to the communication channel provided on the end surface 37 of the sleeve 30, in some embodiments, a communication channel may be provided inside the sleeve 30, and the communication channel may connect the gap space 301 and the breathing channel 33. In other embodiments, a communication channel may be provided on the surface of the second portion 22 that contacts the end surface 37 of the sleeve 30, and the communication channel may connect the gap space 301 and the breathing channel 33.

[0078] In some embodiments of the present invention, the cylinder head 200 is sealed with the sleeve 30 .

[0079] like Figure 3 and Figure 4As shown, a third sealing ring 34 is provided on the outer surface of the tube wall of the sleeve 30 located in the ignition coil accommodating chamber 201 of the cylinder head 200, and the third sealing ring 34 abuts against the chamber wall of the ignition coil accommodating chamber 201 to seal the gap between the sleeve 30 and the ignition coil accommodating chamber 201, thereby preventing water or impurities from entering the ignition coil accommodating chamber 201. The above sealing structure is defined as the fifth sealing structure e.

[0080] At the same time, the upper edge of the sleeve 30 is provided with a flange, and the upper end of the cavity wall of the ignition coil accommodating cavity 201 can be inserted and matched with the flange, wherein the upper end of the cavity wall of the ignition coil accommodating cavity 201 is sealed with the flange, and this sealing structure is defined as the third sealing structure c. The upper end surface of the cavity wall of the ignition coil accommodating cavity 201 is sealed with the flange, and this sealing structure is defined as the fourth sealing structure d. The fourth and third sealing structures can further inhibit water or impurities from entering the ignition coil accommodating cavity 201.

[0081] Therefore, the third, fourth and fifth sealing structures interact and cooperate with each other to inhibit water or impurities from entering the ignition coil accommodating chamber 201, thereby further improving the reliability of the engine.

[0082] In addition, the end face 37 of the sleeve 30 and the second part 22 are press-fitted to achieve a sealing fit between the two. This sealing structure is defined as the second sealing structure b. The first sealing portion 31 provided on the outer surface of the tube wall 36 of the sleeve 30 is defined as the first sealing structure a.

[0083] In this embodiment, the five sealing structures mentioned above interact and cooperate with each other to prevent water or impurities from entering the ignition coil accommodating chamber 201, thereby further improving the reliability of the engine.

[0084] According to an embodiment of the second aspect of the present invention, an engine comprises a cylinder head 200 and the ignition coil 100 of the first aspect. The engine has the advantages of the ignition coil 100, so they are not described in detail.

[0085] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0086] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0087] In the description of the present invention, "plurality" means two or more.

[0088] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0089] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An ignition coil (100), characterized in that: include: A sleeve (30), the sleeve (30) being used for being installed in an ignition coil accommodating chamber (201) of a cylinder head (200) of an engine; A cover body (20), the cover body (20) being arranged to cover the sleeve (30), an airflow path (101) being formed between the sleeve (30) and the cover body (20), the airflow path (101) being connected to the external environment and the ignition coil accommodating chamber (201); A sealing member is provided between the cover body (20) and the sleeve (30), a plurality of connecting parts are provided on at least one of the area where the cover body (20) contacts the sealing member, the area where the sleeve (30) contacts the sealing member, and the sealing member, and the connecting parts are part of the airflow path (101), A plurality of the connecting portions are arranged in sequence and at intervals along the extension direction of the airflow path (101), and any two adjacent connecting portions are staggered.

2. The ignition coil (100) according to claim 1, characterized in that: A plurality of first sealing portions (31) are provided on the surface of the sleeve (30) facing the cover body (20), and the plurality of first sealing portions (31) are arranged in sequence and spaced apart along the extension direction of the airflow path (101), and each of the first sealing portions (31) is provided with a notch (35), and the notch (35) is the connecting portion, and the notches (35) on any two adjacent first sealing portions (31) are staggered.

3. The ignition coil (100) according to claim 2, characterized in that: The included angle of the notches (35) on any two adjacent first sealing portions (31) in the circumferential direction of the sleeve is 180°.

4. The ignition coil (100) according to claim 2, characterized in that: The cover body (20) comprises a first portion (21), the first portion (21) being in contact with a tube wall (36) of the sleeve (30), and an annular first sealing portion (31) is provided on an outer surface of the tube wall (36). The outer ring of the first sealing portion (31) is interference fit with the first part (21), and the first sealing portion (31), the tube wall (36) and the first part (21) form a closed gap space (301), wherein the notch (35) is connected to the gap space (301), and the airflow path (101) includes the notch (35) and the gap space (301).

5. The ignition coil (100) according to claim 4, characterized in that: The cover body (20) further comprises a second portion (22) in contact with the end surface (37) of the sleeve (30). A communication channel is provided on at least one of the second portion (22) and the sleeve (30), wherein the communication channel connects the gap space (301) and the ignition coil accommodating chamber (201), and the airflow path (101) includes the communication channel.

6. The ignition coil (100) according to claim 5, characterized in that: The end surface (37) is provided with the connecting channel, and at least part of the connecting channel is a labyrinth channel (32). The labyrinth channel (32) includes at least one annular groove along the circumference of the sleeve (30), or / and at least one arc-shaped groove.

7. The ignition coil (100) according to claim 6, characterized in that: A flow limiting portion (321) is provided on the annular groove or the arc-shaped groove.

8. The ignition coil (100) according to claim 5, characterized in that: The end surface (37) is sealingly matched with the second portion (22).

9. An engine, characterized in that: The invention comprises a cylinder head (200) and an ignition coil (100) according to any one of claims 1 to 8.

10. The engine according to claim 9, characterized in that The ignition coil accommodating chamber (201) of the cylinder head (200) is sealed and matched with the sleeve (30).

11. A vehicle, characterized in that: Comprising the engine as claimed in claim 9 or 10.

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