CN117552882A - Cylinder head assembly and engine - Google Patents

Abstract

The application relates to a cylinder head assembly and an engine. The cylinder head assembly includes: a precombustor including a positioning part and a precombustor body connected to each other; the cylinder cover is provided with a first mounting hole, the diameter of the outer peripheral wall of the positioning part is larger than that of the first mounting hole, and the diameter of the outer peripheral wall of the precombustion chamber main body is smaller than that of the first mounting hole; and the installation assembly comprises a plurality of first guide pieces, the plurality of first guide pieces are arranged at intervals along the circumference of the first installation hole, one end of each first guide piece is connected with the cylinder head, the other end of each first guide piece is penetrated in the positioning part along the first direction, the precombustor body can move into the first installation hole along the first guide pieces, and the first direction is parallel to the central axis of the first installation hole. The precombustor is realized fixing a position through first direction spare, has reduced the location degree of difficulty to precombustor removes along first direction spare, makes between precombustor and the cylinder head can keep initial positioning state, improves precombustor's installation accuracy.

Description

Cylinder head assembly and engine

Technical Field

The application relates to the technical field of engines, in particular to a cylinder head assembly and an engine.

Background

Most of the traditional engines adopt a single combustion chamber structure, namely a closed space formed by the bottom surface of a cylinder cover, a cylinder sleeve, a cylinder gasket and the top surface of a piston, and a spark plug is used for igniting combustible mixed gas in the combustion chamber to realize combustion work. The combustion mode has limited ignition energy and slow flame propagation speed, thereby limiting further improvement of thermal efficiency. In order to improve the combustion speed of the fuel gas, a precombustor structure is added on the basis of the original main combustion chamber, the fuel gas is ignited and combusted in the precombustor, and flame is spread into the main combustion chamber through a spray hole at the bottom of the precombustor, so that the heat efficiency can be further improved.

In the related art, the prechamber structure is often mounted to the cylinder head by means of a threaded connection. However, because the prechamber needs to be aligned with the injector, ignition of the prechamber is achieved. However, the screw connection is difficult to determine the screw starting point position of the precombustor, so that the positioning difficulty of the precombustor is high, and the problem of inaccurate positioning exists during installation.

Disclosure of Invention

Based on this, it is necessary to provide a cylinder head assembly and an engine for the problem of inaccurate positioning of the prechamber installation.

A first aspect of the present application provides a cylinder head assembly, the cylinder head assembly comprising: a precombustor including a positioning part and a precombustor body connected to each other; the cylinder cover is provided with a first mounting hole, the diameter of the outer peripheral wall of the positioning part is larger than that of the first mounting hole, and the diameter of the outer peripheral wall of the precombustion chamber main body is smaller than that of the first mounting hole; and the installation assembly comprises a plurality of first guide pieces, the plurality of first guide pieces are arranged at intervals along the circumference of the first installation hole, one end of each first guide piece is connected with the cylinder head, the other end of each first guide piece is penetrated in the positioning part along the first direction, the precombustor body can move into the first installation hole along the first guide pieces, and the first direction is parallel to the central axis of the first installation hole.

In one embodiment, the installation assembly comprises a second guide piece and an operating piece, the second guide piece is connected to one end, far away from the cylinder cover, of the first guide piece, the operating piece penetrates through the guide piece and is connected to the precombustor, and the operating piece can move relative to the second guide piece and drive the precombustor to move along the first guide piece.

In one embodiment, the installation assembly further comprises a connecting piece, the connecting piece is arranged between the second guiding piece and the precombustion piece, the connecting piece is connected to the precombustion piece, and the operating piece penetrates through the guiding piece and is connected to the connecting piece.

In one embodiment, the engagement member is provided with a coupling cavity, the coupling cavity is opened along the first direction, and one end of the operation member can be accommodated in the coupling cavity.

In one embodiment, the mounting assembly further comprises a fixing member, the connecting member is further provided with a fixing hole, the fixing hole is communicated with the combining cavity and is arranged along the circumferential direction of the combining cavity, and the fixing member is configured to penetrate through the fixing hole and is connected with the operating member, so that the operating member is fixed in the combining cavity.

In one embodiment, the pre-combustion body comprises a first mating part and a second mating part, the positioning part is connected to one end of the first mating part, which is close to the second guide, the second mating part is connected to one end of the first mating part, which is far away from the second guide, the diameter of the outer peripheral wall of the second mating part is smaller than that of the outer peripheral wall of the first mating part, a step surface is arranged in the first mounting hole, and the first mating part can be abutted to the step surface.

In one embodiment, the pre-combustion body further comprises a third mating portion connected to the end of the second mating portion remote from the first guide, the diameter of the outer peripheral wall of the third mating portion is smaller than that of the outer peripheral wall of the second mating portion, and the third mating portion is in transition fit with the end of the first mounting hole remote from the first guide.

In one embodiment, the cylinder head assembly further includes a seal assembly including at least a first seal disposed between the locating portion and the cylinder head and a second seal disposed between the first mating portion and the step surface.

In one embodiment, the cylinder head assembly further comprises a fuel injector, the cylinder head is further provided with a second mounting hole, the central axis of the second mounting hole is inclined relative to the central axis of the first mounting hole and is communicated with the first mounting hole, and the fuel injector is arranged in the second mounting hole and can be abutted against the precombustor.

Another aspect of the present application provides an engine comprising a cylinder head assembly as described above.

The cylinder cover assembly is connected to the cylinder cover through the first guide piece of the locating part of the precombustor is worn to locate by the other end, and locating between the precombustor and the cylinder cover is achieved.

Drawings

FIG. 1 is a cross-sectional view of a cylinder head assembly in an embodiment of the present application.

FIG. 2 is a schematic view of a cylinder head assembly in an embodiment of the present application.

FIG. 3 is a schematic view of a cylinder head assembly in an embodiment of the present application when installed.

FIG. 4 is a schematic view of a precombustor in an embodiment of the present application.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1-3, fig. 1-3 show schematic views of a cylinder head assembly in an embodiment of the present application. Cylinder head assembly 100 provided in an embodiment of the present application includes a prechamber 20, a cylinder head 10, and a mounting assembly 30.

Referring to fig. 4, prechamber 20 includes locating portion 21 and prechamber main body, and locating portion 21 can the butt in cylinder head 10, and the prechamber main body can stretch into in cylinder head 10, communicates in the combustion chamber of cylinder to realize the ignition to the cylinder, is equipped with prechamber 25 on prechamber 20, and prechamber 25 one end opening, thereby pack spark plug 40 into prechamber 25, and the other end is provided with orifice 241, orifice 241 intercommunication prechamber 25 and cylinder. Preferably, a plurality of injection holes 241 are arranged at intervals along the circumference of the prechamber 25.

The cylinder head 10 is used for the installation of the pre-combustion 20, and the cylinder head 10 is provided with a first installation hole 11, so that the injection hole 241 can communicate with the inside of the cylinder by accommodating the pre-combustion chamber body in the first installation hole 11, thereby realizing the combustion process for the cylinder.

The compression stroke of the engine can press part of the mixed gas in the cylinder into the precombustion chamber 25 through the spray holes 241, after the spark plug 40 ignites, the mixed gas in the precombustion chamber 25 is ignited, the part of the mixed gas is firstly combusted and expanded in the precombustion chamber 25, flame is quickly diffused to the periphery after forming a flame kernel, the flame is quickly expanded into the cylinder through the flame spray holes 241 designed at the bottom of the precombustion chamber 25, and a plurality of ignition points are formed in the cylinder, so that the quick combustion process is realized, the combustion speed is improved, the combustion time is shortened, the combustion state of the mixed gas can be well improved, the air-fuel ratio is further improved, and the fuel consumption and the emission are improved.

Mounting assembly 30 is used to mount and secure prechamber 20 on cylinder head 10. The mounting assembly 30 includes a guide unit 31. Guide unit 31 is used to provide positioning and guidance of prechamber 20. Specifically, the guide unit 31 includes a first guide 311, a first positioning hole 211 is provided on the positioning portion 21 of the prechamber 20, the first positioning hole 211 is provided around the circumference of the opening 251, a second positioning hole 13 is provided on the cylinder head 10, the second positioning hole 13 is provided along the circumference of the first mounting hole 11, one end of the first guide 311 is connected to the cylinder head 10 through the second positioning hole 13, the other end is provided in the first positioning hole 211 of the positioning portion 21 in a first direction, and the first direction is parallel to the central axis of the first mounting hole 11, so that the prechamber body can move into the first mounting hole 11 along the first guide 311. First guide 311 defines a path of travel for prechamber 20, making assembly efficient.

Further, the plurality of first guides 311 are arranged in plural, and the plurality of first guides 311 are arranged at intervals along the circumferential direction of the first mounting hole 211, such as two first guides 311 which are arranged at two sides of the first mounting hole 211 in a facing manner, three first guides 311 which are arranged in a triangular manner in the circumferential direction of the first mounting hole 211, four first guides 311 which are arranged in a square manner in the circumferential direction of the first mounting hole, and the like, so that the fixation of each position of the precombustor 20 can be realized, and the precombustor 20 can be uniformly and stably mounted on the cylinder head 10.

Through a plurality of one ends connect in cylinder head 10, the other end wears to locate the first guide 311 of the location portion 21 of precrushing member 20, realize the location between precrushing member 20 and the cylinder head 10, and further, precrushing member 20 can get into first mounting hole 11 along first guide 311, first guide 311 provides the direction for the removal of precrushing member 20 for precrushing member 20 can keep moving under the state of aligning with sprayer 60, avoid causing precrushing member 20's position inaccuracy because of precrushing member 20 rotates, improved precrushing member 20's counterpoint precision and installation accuracy.

In some embodiments, the mounting assembly further comprises an operating member 32, and the guide unit 31 further comprises a second guide 312. Operating member 32 is configured to be operated by a user to enable movement of prechamber 20 along first guide 311. Specifically, second guide 312 is provided with guide hole 3121, the central axes of guide hole 3121 and first mounting hole 11 coincide with each other, and operating member 32 is configured to be connected to prechamber 20 through guide hole 3121, operating member 32 being movable relative to second guide 312, thereby driving prechamber 20 to move along first guide 311 into first mounting hole 11. The arrangement of pilot hole 3121 restricts the movement path of operating member 32, thereby realizing that operating member 32 can accurately and stably drive prechamber 20 to move into first mounting hole 11, avoiding prechamber 20 from being askew due to uneven force and the like when moving, and improving the mounting efficiency and the mounting accuracy of prechamber 20. In the present embodiment, the first guide 311 is screw-coupled to the second positioning hole 13 and the second guide 312.

In some embodiments, referring to fig. 1, the cylinder head assembly 100 further includes a water jacket 50. The coolant can circulate in the water jacket 50, transferring thermal energy to the coolant by conduction of heat from the temperature of the engine combustion chamber and the cylinder inner wall. The water jacket 50 can effectively reduce the temperature of the engine, maintain the equilibrium temperature of all parts of the engine, and improve the thermal efficiency and reliability of the engine.

In some embodiments, referring to fig. 1 and 3, cylinder head assembly 100 further includes a fuel injector 60, cylinder head 10 is provided with a second mounting hole 12, an axis of second mounting hole 12 is disposed obliquely with respect to an axis of first mounting hole 11 and is communicated with first mounting hole 11, and fuel injector 60 is disposed in second mounting hole 12 and abuts against prechamber 20.

The arrangement of the second mounting hole 12 enables the fuel injector 60 to avoid contact with the coolant in the cylinder head 10, thereby avoiding mixing of the coolant and the fuel, and affecting the combustion effect. Further, referring to fig. 1 and 4, the end of the fuel injector 60 is provided with a fuel injection hole, not shown, and the prechamber 20 is provided with a connecting hole 231, and the fuel injection hole is disposed toward the connecting hole 231, so that fuel enters the prechamber 25 through the fuel injection hole.

The provision of the fuel injector 60 may improve the combustion process, increase combustion efficiency and control combustion characteristics. The fuel is atomized into fine combustion particles by injecting the fuel in the prechamber 25 by means of the injector 60, so that it can be mixed with air better. Thus being beneficial to promoting the full combustion of fuel, improving the combustion efficiency and reducing the exhaust emission and the fuel consumption. The fuel injector 60 may also adjust the fuel-air mixture ratio within the prechamber 25, changing the stability and rate of combustion.

The orientation of connecting hole 231 is fixed when prechamber 20 is installed by the arrangement of a plurality of first guide members 311, and the connecting hole 231 of prechamber 20 is always arranged towards the oil spray hole, so that the connecting hole 231 of prechamber 20 is aligned with the oil spray hole after installation, and accurate positioning of prechamber 20 is realized.

In some embodiments, referring to fig. 1-3, mounting assembly 30 further includes an engagement member 33, engagement member 33 is disposed between second guide 312 and prechamber 20, engagement member 33 is connected to prechamber 20 and is capable of closing opening 251, and operation member 32 abuts against engagement member 33 through guide hole 3121.

The arrangement of engagement member 33 facilitates the connection between prechamber 20 and operating member 32, and by means of the arrangement of engagement member 33, operating member 32 can be adapted to prechamber 20 of different sizes, improving the versatility of mounting assembly 30, and the arrangement of engagement member 33 helps to avoid injuries of operating member 32 to prechamber 20, helping to ensure a long-term use of prechamber 20.

Further, the engagement member 33 includes an engagement portion 331 and a receiving portion 332 connected to the engagement portion 331, the receiving portion 332 is received in the precombustion chamber 25, the engagement portion 331 can close the opening 251 of the precombustion member 20, the engagement portion 331 is provided with a combining cavity 333, the combining cavity 333 is opened along the first direction, and one end of the operating member 32 can be received in the combining cavity 333. Preferably, the central axes of bonding chamber 333 and pilot hole 3121 coincide with each other, thereby achieving accurate installation of prechamber 20 into first mounting hole 11.

Specifically, engaging portion 331 is disposed between prechamber 20 and second guide 312, accommodating portion 332 is screwed to prechamber 25, and operating member 32 abuts against the bottom of combining cavity 333, so that operating member 32 can drive engaging portion 331 and prechamber 20 to move into first mounting hole 11 relative to first guide 311, and fixed connection between prechamber 20 and cylinder head 10 is achieved.

In some embodiments, the mounting assembly 30 further includes a fixing member 34, the engagement portion 331 is further provided with a fixing hole 334, the fixing hole 334 is communicated with the coupling cavity 333 and disposed along the circumferential direction of the operating member 32, and the fixing member 34 is configured to penetrate through the fixing hole 334 and abut against the operating member 32, so that the operating member 32 is fixed in the coupling cavity 333. Optionally, the fixing member 34 is a fastener, and the fixing member 34 is screwed to the fixing hole 334.

In the present application, referring to fig. 1 to 3, the operating piece 32 is provided with an operating portion 321, a first abutting portion 322, a coupling portion 323, a fixing portion 324, and a second abutting portion 325 in this order along the axial direction thereof. Operating portion 321 is for an operator to operate so that operating member 32 drives movement of prechamber 20. The diameter of the outer peripheral wall of first abutting portion 322 is larger than the diameters of the outer peripheral walls of coupling portion 323 and second abutting portion 325, so that when second abutting portion 325 abuts against the bottom of coupling chamber 333, first abutting portion 322 can abut against the end face of engaging portion 331 away from prechamber 20, thereby facilitating connection of operating piece 32 and engaging portion 331. The coupling portion 323, the fixing portion 324, and the second abutting portion 325 can be accommodated in the coupling cavity 333, and the diameter of the outer peripheral wall of the fixing portion 324 is smaller than the diameters of the outer peripheral walls of the coupling portion 323 and the second abutting portion 325, and the axial dimension of the fixing portion 324 is matched with the radial dimension of the fixing member 34, so that the operating member 32 can be fixed in the coupling cavity 333 by abutting the fixing member 34 to the fixing portion 324, and stability of the operating member 32 when moving is improved.

Operationally, operating member 32 is threadably coupled to second guide member 312, and by rotating operating member 32, operating member 32 moves relative to second guide member 312 via the coupled threads, thereby pushing prechamber 20 and engaging member 33 along first guide member 311 until prechamber 20 contacts the cylinder wall.

Preferably, mounting assembly 30 is detachably coupled to cylinder head 10 and prechamber 20, thereby facilitating the installation and removal of prechamber 20, and preventing damage to prechamber 20 based on operating element 32 and engaging elements 33, thereby improving the quality and efficiency of the assembly of prechamber 20 and cylinder head 10.

Referring to FIG. 4, FIG. 4 shows a schematic view of prechamber 20 according to one embodiment of the present application. In some embodiments, prechamber 20 has, in its axial direction, a positioning portion 21 and a prechamber body, prechamber body comprising a first mating portion 22, positioning portion 21 being connected to one end of first mating portion 22 near second guide 312, first mating portion 22 being housed in first mounting hole 11, the diameter of the outer peripheral wall of positioning portion 21 being larger than the diameter of first mounting hole 11, the diameter of the outer peripheral wall of first mating portion 22 being smaller than the diameter of first mounting hole 11, second positioning hole 13 being arranged on positioning portion 21.

Positioning portion 21 is provided to facilitate determining whether prechamber 20 is fully seated in first mounting hole 11. When positioning portion 21 moves to abut against cylinder head 10, prechamber 20 completes the installation with cylinder head 10, preventing further movement of prechamber 20. And setting up of location portion 21 is convenient for the setting of second locating hole 13 for first guide 311 can wear to locate prechamber 20, thereby makes prechamber 20 can follow first guide 311 and remove, realizes the location and the installation of prechamber 20, simplifies prechamber 20's location process.

Possibly, the first fitting portion 22 is in interference connection with the first mounting hole 11, so that connection between the precombustor 20 and the cylinder head 10 can be realized, and sealing between the precombustor 20 and the cylinder head 10 can be realized, thereby avoiding air leakage.

Further, the prechamber main body further has a second fitting portion 23 in the axial direction thereof, the second fitting portion 23 is connected to one end of the first fitting portion 22 away from the second guide 312, the diameter of the outer peripheral wall of the second fitting portion 23 is smaller than that of the outer peripheral wall of the first fitting portion 22, a stepped surface is provided in the first mounting hole 11, and the first fitting portion 22 abuts on the stepped surface.

The arrangement of the first matching part 22 and the second matching part 23 enables the precombustion chamber 25 to be also provided with a step surface, at least part of the spark plug 40 is abutted against the step surface, so that the positioning of the spark plug 40 is realized, and the spark plug 40 can always ignite fuel gas in the precombustion chamber 25.

Specifically, in this embodiment, the prechamber main body further has a third fitting portion 24 in the axial direction thereof, the third fitting portion 24 is connected to an end of the second fitting portion 23 remote from the second guide 312, the diameter of the outer peripheral wall of the third fitting portion 24 is smaller than that of the outer peripheral wall of the second fitting portion 23, and the third fitting portion 24 is in transition fit with an end of the first mounting hole 11 remote from the first guide 311. The nozzle 241 is disposed on the third fitting portion 24. Preferably, positioning portion 21, first mating portion 22, second mating portion 23, and third mating portion 24 are integrally formed, improving the strength and reliability of prechamber 20 itself.

The transition fit can be applicable to the expend with heat and contract with cold of third mating portion 24, increases the reliability that prechamber 25 and cylinder head 10 connect, has improved the leakproofness between prechamber 25 and the first mounting hole 11 simultaneously for in the unable entering first mounting hole 11 of gas, the coolant liquid of cooling cylinder head 10 also can not reveal to the cylinder simultaneously.

Optionally, the transition fit tolerance band of the third fitting portion 24 and the first mounting hole 11 is H7/K6. It is possible that, before the installation, the third fitting 24 is contracted after being immersed in liquid nitrogen for at least 30 minutes so as to install the third fitting 24 into the first installation hole 11.

In some embodiments, referring to fig. 1, 3 and 4, the cylinder head assembly 100 further includes a seal assembly 70, the seal assembly 70 including at least a first seal 71 and a second seal 72, the first seal 71 being disposed between the positioning portion 21 and the cylinder head 10, the second seal 72 being disposed between the first mating portion 22 and the step surface. Alternatively, at the time of installation, when the first seal 71 is in contact with the cylinder head 10, the operation member 32 is continued to be rotated so that the first seal 71 abuts against the cylinder head 10. Prechamber 20 and cylinder head 10 may be considered to be substantially sealed when the rotational force is between 60 nm and 80 nm.

The provision of first seal 71 can reduce damage to prechamber 20 at the time of installation, compensate for errors in manufacturing and assembly, and seal the oil in first mounting hole 11 for lubricating prechamber 20. Optionally, the first seal 71 is a rubber gasket. The provision of the second seal 72 serves to isolate the gas from the coolant, optionally the second seal 72 is a metal gasket.

In particular, in this embodiment, seal assembly 70 further includes a third seal 73, seal groove 221 is provided on first mating portion 22 of prechamber 20, and third seal 73 is disposed in seal groove 221. Third seal 73 serves to isolate the cooling fluid from the engine oil, thereby ensuring the lubricating effect of the engine oil on prechamber 20 and the cooling effect of the cooling fluid on prechamber 20. Optionally, the third seal 73 is an O-ring rubber seal.

In the mounting process, first guide piece 311 is inserted through first positioning hole 211 and one end is connected to second positioning hole 13, connecting piece 33 is connected to prechamber 20 until the end face of prechamber 20 is attached to the end face of connecting piece 33, and second guide piece 312 is connected to the other end of first guide piece 311. Thereafter, guide member threading guide hole 3121 is abutted against engagement member 33, securing member 34 is threaded through securing hole 334 to secure the guide member, and finally operating member 32 is driven such that prechamber 20 moves along first guide 311 into first mounting hole 11.

As the same concept of the present application, the present application also provides an engine including the cylinder head assembly 100, the cylinder head assembly 100 being the cylinder head assembly 100 in the above-described embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A cylinder head assembly, the cylinder head assembly comprising:

a precombustor comprising a locating portion and a precombustor body connected to each other;

a cylinder cover provided with a first mounting hole, wherein the diameter of the outer peripheral wall of the positioning part is larger than that of the first mounting hole, and the diameter of the outer peripheral wall of the precombustion chamber main body is smaller than that of the first mounting hole; and

the installation component, the installation component includes a plurality of first guides, a plurality of first guides are followed the circumference interval setting of first mounting hole, every first guide homogeneous end connect in the cylinder head, the other end is worn to locate along first direction the location portion, make the prechamber main part can be followed first guide removes to get into in the first mounting hole, first direction is on a parallel with the central axis of first mounting hole.

2. The cylinder head assembly of claim 1, wherein the mounting assembly includes a second guide member coupled to an end of the first guide member remote from the cylinder head, and an operating member disposed through the guide member and coupled to the pre-combustion member, the operating member being movable relative to the second guide member and moving the pre-combustion member along the first guide member.

3. The cylinder head assembly of claim 1, wherein the mounting assembly further comprises an engagement member disposed between the second guide member and the pre-combustion member, the engagement member being connected to the pre-combustion member, the operating member passing through the guide member and being connected to the engagement member.

4. The cylinder head assembly of claim 3, wherein the engagement member has a coupling cavity therein, the coupling cavity being open in the first direction, one end of the operating member being receivable in the coupling cavity.

5. The cylinder head assembly of claim 4, wherein the mounting assembly further comprises a securing member, the engagement member further having a securing aperture therein, the securing aperture being in communication with the coupling cavity and disposed circumferentially thereof, the securing member being configured to pass through the securing aperture and be connected to the operating member such that the operating member is secured within the coupling cavity.

6. The cylinder head assembly as set forth in any one of claims 1-5 wherein the pre-combustion body includes a first mating portion and a second mating portion, the positioning portion being connected to an end of the first mating portion that is proximate to the second guide, the second mating portion being connected to an end of the first mating portion that is distal to the second guide, a diameter of an outer peripheral wall of the second mating portion being smaller than a diameter of an outer peripheral wall of the first mating portion, a step surface being provided in the first mounting hole, the first mating portion being capable of abutting on the step surface.

7. The cylinder head assembly of claim 6, wherein the pre-combustion body further comprises a third mating portion connected to an end of the second mating portion remote from the first guide, a diameter of an outer peripheral wall of the third mating portion being smaller than a diameter of an outer peripheral wall of the second mating portion, the third mating portion being in transition fit with an end of the first mounting hole remote from the first guide.

8. The cylinder head assembly of claim 6, further comprising a seal assembly including at least a first seal disposed between the locating portion and the cylinder head and a second seal disposed between the first mating portion and the step surface.

9. The cylinder head assembly of claim 1, further comprising a fuel injector, wherein the cylinder head is further provided with a second mounting hole, wherein a central axis of the second mounting hole is inclined relative to a central axis of the first mounting hole and is communicated with the first mounting hole, and wherein the fuel injector is configured in the second mounting hole and can abut against the pre-combustion member.

10. An engine comprising the cylinder head assembly of any one of claims 1-9.