CN215927587U - Cylinder head assembly and engine - Google Patents
Cylinder head assembly and engine Download PDFInfo
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- CN215927587U CN215927587U CN202122008357.2U CN202122008357U CN215927587U CN 215927587 U CN215927587 U CN 215927587U CN 202122008357 U CN202122008357 U CN 202122008357U CN 215927587 U CN215927587 U CN 215927587U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The embodiment of the application relates to a cylinder cover assembly and an engine, and belongs to the field of engines. The embodiment of the application aims at solving the problem that the gas and the mixed gas are not uniformly mixed when entering the precombustion chamber in the related art. The cylinder cover assembly comprises a cylinder cover body, a precombustion chamber body, an air inlet pipe and an ignition component for ignition; the ignition assembly and the precombustion chamber body are arranged in a first mounting hole of the cylinder cover body; a precombustion chamber is arranged in the precombustion chamber body, an opening is formed in the top wall of the precombustion chamber body facing the ignition assembly, and part of the ignition assembly extends into the opening; the precombustion chamber body is provided with a plurality of air inlets communicated with the precombustion chamber, and the plurality of air inlets are arranged at equal intervals around the central line of the opening; the intake pipe sets up on the cylinder cap body, and intake pipe and each air inlet intercommunication. The cylinder head assembly of this application embodiment can improve the homogeneity that gas and mist in the precombustion chamber mix, guarantees the engine performance.
Description
Technical Field
The embodiment of the application belongs to the field of engines, and particularly relates to a cylinder cover assembly and an engine.
Background
The spark-ignition engine comprises a cylinder body and a cylinder cover assembly connected to the cylinder body, wherein a main combustion chamber is arranged in the cylinder body, and a precombustion chamber communicated with the main combustion chamber is arranged on the cylinder cover assembly; when the gas burner works, gas and mixed gas are firstly ignited in the precombustion chamber, then enter the main combustion chamber from the precombustion chamber to be mixed with a large amount of mixed gas and then continue to burn.
In the related art, a cylinder head assembly includes a cylinder head body, a prechamber body, a spark plug bush, and a spark plug; the cylinder cover body is provided with a mounting hole communicated with the main combustion chamber, the spark plug bush and the precombustion chamber body are arranged in the mounting hole, and the precombustion chamber is arranged on the precombustion chamber body; an air inlet channel communicated with the precombustion chamber is arranged on the spark plug bush, the air inlet channel is communicated with the precombustion chamber, and the spark plug is arranged in the spark plug bush. When the gas burner works, gas enters the pre-combustion chamber through the air inlet channel, the spark plug ignites the gas in the pre-combustion chamber, and then the ignited gas enters the main combustion chamber from the pre-combustion chamber to be continuously combusted.
However, in the related art, when the fuel gas enters the precombustion chamber, the fuel gas is not uniformly mixed with the air-fuel mixture in the precombustion chamber, and the engine performance is affected.
SUMMERY OF THE UTILITY MODEL
In view of this, the present disclosure provides a cylinder head assembly and an engine to solve the technical problem of uneven mixing between fuel gas and a mixture gas when the fuel gas enters a pre-combustion chamber.
The embodiment of the application provides a cylinder cover assembly, which comprises a cylinder cover body, a pre-combustion chamber body, an air inlet pipe and an ignition assembly for ignition; the cylinder cover body is provided with a first mounting hole, the ignition assembly and the precombustion chamber body are arranged in the first mounting hole, and the precombustion chamber body is positioned at one end, facing the cylinder body, of the ignition assembly; a pre-combustion chamber is arranged in the pre-combustion chamber body, an opening is formed in the top wall of the pre-combustion chamber body facing the ignition assembly, part of the ignition assembly extends into the opening, and an ignition port used for being communicated with a main combustion chamber in a cylinder body is formed in one end, far away from the ignition assembly, of the pre-combustion chamber body; the precombustion chamber body is provided with a plurality of air inlets communicated with the precombustion chamber, and the plurality of air inlets are arranged at equal intervals around the central line of the opening; the intake pipe sets up on the cylinder cap body, just the intake pipe with each air inlet intercommunication.
The cylinder head assembly of this application embodiment, this internal first mounting hole that is provided with of cylinder head, this internal precombustion chamber that is provided with of precombustion chamber and ignition element install in first mounting hole in proper order, this internal precombustion chamber that is provided with of precombustion chamber, be provided with the opening on the roof of precombustion chamber, part ignition element stretches into in the precombustion chamber by the opening, still be provided with a plurality of air inlets with the precombustion chamber intercommunication on the roof of precombustion chamber, a plurality of air inlets all communicate with the intake pipe, make the gas in the intake pipe can get into in the precombustion chamber through a plurality of air inlets on the roof, and a plurality of air inlets encircle the equidistant setting of open-ended central line, make the gas can get into in the precombustion chamber simultaneously from open-ended circumference via a plurality of air inlets, the homogeneity that the mixing of gas in with the precombustion chamber has been improved, guarantee the performance of engine.
In some embodiments, which may include the above-described embodiments, the ignition assembly includes a spark plug bushing having one end abutting the top wall and a spark plug threaded into the spark plug bushing, the firing end of the spark plug extending into the opening.
In some embodiments, which may include the above-described embodiments, each of the intake ports is provided on the first end top wall, and the spark plug bush has a plurality of first connecting passages extending inward toward an end of the prechamber body therein, each of the first connecting passages communicating with one of the intake ports; the air inlet pipe is communicated with the first connecting passages.
In some embodiments, which may include the embodiments described above, the thickness of the prechamber body top wall is less than the thickness of the side wall of the prechamber body adjacent to the top wall.
In some embodiments, which may include the above embodiments, each of the first connecting passages is disposed around a center line of the opening, and a center line of each of the connecting passages is disposed obliquely such that an end of each of the first connecting passages facing the prechamber body is closer to the center line of the opening than an end of the first connecting passage facing away from the prechamber body.
In some embodiments, which may include the above-mentioned embodiments, a center line of each of the first connecting channels and a center line of the opening are located in the same plane;
alternatively, a center line of each of the first connecting passages and a center line of the opening are located in different planes.
In some embodiments, which may include the above embodiments, an annular air distribution channel is further disposed in the spark plug bush, and a center line of the air distribution channel is collinear with a center line of the opening; and one end of each first connecting channel, which is deviated from the precombustion chamber body, is communicated with the gas distribution channel, and the gas inlet pipe is communicated with the gas distribution channel.
In some embodiments, which may include the above embodiments, a second connecting channel is further provided on the spark plug bush, one end of the second connecting channel is connected to the air distribution channel, and the other end of the second connecting channel is communicated with the air inlet pipe.
In some embodiments, which may include the above-mentioned embodiments, a check valve for allowing only gas to flow from the intake pipe to the second connection passage is provided between the second connection passage and the intake pipe.
The embodiment of the application also provides an engine, which comprises the cylinder cover assembly.
The engine of the embodiment of the application also has the advantages of the cylinder head assembly due to the fact that the engine comprises the cylinder head assembly, and the description is omitted.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is easy to see that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to the drawings without creative efforts for those skilled in the art.
FIG. 1 is a schematic structural diagram of a cylinder head assembly provided in an embodiment of the present disclosure;
FIG. 2 is an enlarged view of a portion of the cylinder head assembly of FIG. 1 at A.
Description of reference numerals:
100-cylinder cover body;
101-a first mounting hole;
102-plane;
103-a second mounting hole;
200-a prechamber body;
201-precombustion chamber;
202-a top wall;
203-opening;
204-an air inlet;
205-an ignition port;
206-side walls;
207-a sealing gasket;
208-a first sealing ring;
300-an air inlet pipe;
301-an air intake channel;
302-a one-way valve;
303-a second conical surface;
304-a locking sleeve;
305-a via;
306-a fourth taper;
307-third seal ring;
308-a third taper;
400-an ignition assembly;
401-spark plug bush;
402-a first connection channel;
403-gas distribution channel;
404-a second connection channel;
405-a second sealing ring;
406-connecting vias;
407-groove;
408-a spark plug;
409-a firing end;
410-first taper.
Detailed Description
In the related art, an engine generally includes a cylinder block and a cylinder head assembly, wherein a main combustion chamber is disposed in the cylinder block; the cylinder head assembly is connected to the cylinder body and is used for sealing the main combustion chamber. The cylinder head assembly generally includes a head body, a prechamber body, a spark plug liner, and a spark plug. Be provided with the mounting hole on the cylinder cap body, mounting hole and main combustion chamber intercommunication, precombustion chamber body and spark plug bush are installed in the mounting hole, this internal precombustion chamber that is provided with and main combustion chamber intercommunication in the precombustion chamber, and the spark plug is installed in the spark plug bush and is stretched into to the precombustion chamber in, still is provided with inlet channel in the spark plug bush, and inlet channel communicates to in the precombustion chamber, and the gas is in the precombustion chamber of admitting air via inlet channel. However, in the cylinder head assembly in the related art, the air inlet channel is disposed on one side of the spark plug bush, the air inlet is disposed on one side of the prechamber body, the air inlet is communicated with the air inlet channel, and the fuel gas enters the prechamber through the air inlet channel and the air inlet, so that the fuel gas enters the prechamber from one side of the prechamber body, which causes uneven mixing of the fuel gas and the mixed gas in the prechamber, and easily causes risks such as poor ignition, and affects the performance of the engine.
The cylinder head assembly of this application embodiment is provided with a plurality of air inlets on the precombustion chamber body, and a plurality of air inlets all communicate with the intake pipe, and a plurality of air inlets encircle the open-ended central line setting of precombustion chamber roof, and in the gas can get into the precombustion chamber simultaneously from open-ended circumference via a plurality of air inlets, improved the homogeneity that the gas mixes with the interior gas mixture of precombustion chamber, guaranteed the performance of engine.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application. And can be adjusted as needed by those skilled in the art to suit particular applications.
Furthermore, it should be noted that in the description of the embodiments of the present application, the terms of direction or positional relationship indicated by the terms "inside" and "outside" and the like are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or member must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the embodiments of the present application.
Furthermore, it should be noted that, in the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the examples of the present application can be understood by those skilled in the art as appropriate.
One aspect of the present embodiments provides an engine. The engine typically includes a cylinder head body and also includes a block. A main combustion chamber is arranged in the cylinder body and used for combusting mixed gas, and a piston is arranged in the main combustion chamber and pushes the piston to work when the mixed gas is combusted. The cylinder head assembly is connected to the cylinder body and used for sealing the main combustion chamber. The cylinder head assembly is provided with a precombustion chamber which is communicated with the main combustion chamber. When the piston moves in the main combustion chamber to compress the mixed gas in the main combustion chamber, the mixed gas in the main combustion chamber is pressed into the precombustion chamber, then the gas is introduced into the precombustion chamber, the mixed gas in the gas and the precombustion chamber is ignited, and then the mixed gas enters the main combustion chamber through the precombustion chamber to be mixed with the mixed gas and then continuously combusted, so that the piston is pushed to move reversely in the main combustion chamber.
Referring to fig. 1 and 2, another aspect of the present embodiment provides a cylinder head assembly including a cylinder head body 100, a pre-chamber body 200, an intake pipe 300, and an ignition assembly 400 for ignition. A first mounting hole 101 is formed in the cylinder head body 100, the ignition assembly 400 and the pre-combustion chamber body 200 are both arranged in the first mounting hole 101, and the pre-combustion chamber body 200 is located at one end, facing the cylinder body, of the ignition assembly 400; a prechamber 201 is arranged in the prechamber body 200, an opening 203 is arranged on the top wall of the prechamber body 200 facing the ignition assembly 400, part of the ignition assembly 400 extends into the opening 203, and an ignition port 205 used for communicating with a main combustion chamber in a cylinder is arranged at one end of the prechamber body 200 far away from the ignition assembly 400; the prechamber body 200 is provided with a plurality of air inlets 204 communicated with the prechamber 201, and the plurality of air inlets 204 are arranged around the central line of the opening 203 at equal intervals; the intake pipe 300 is provided on the cylinder head body 100, and the intake pipe 300 communicates with each intake port 204.
The cylinder head assembly of the embodiment of the application, the first mounting hole 101 is arranged in the cylinder head body 100, the prechamber body 200 and the ignition assembly 400 are sequentially mounted in the first mounting hole 101, the prechamber 201 is arranged in the prechamber body 200, the opening 203 is arranged on the top wall 202 of the prechamber 201, part of the ignition assembly 400 extends into the prechamber 201 from the opening 203, the top wall 202 of the prechamber 201 is further provided with a plurality of air inlets 204 communicated with the prechamber 201, the plurality of air inlets 204 are communicated with the air inlet pipe 300, so that the gas in the air inlet pipe 300 can enter the prechamber through the plurality of air inlets 204 on the top wall 202, and the plurality of air inlets 204 are arranged at equal intervals around the center line of the opening 203, so that the gas can enter the prechamber 201 from a plurality of directions around the center line of the opening 203 at the same time, the mixing uniformity of the gas and the mixed gas in the prechamber 201 is improved, and the problem of poor ignition is prevented, thereby ensuring the performance of the engine.
Referring to fig. 1, a head body 100 is provided with a first mounting hole 101, and the first mounting hole 101 is used to mount a prechamber body 200 and an ignition assembly 400. For example, the first mounting hole 101 may be a step-shaped through hole, a plane 102 is disposed in a portion of the first mounting hole 101 facing the main combustion chamber, the prechamber body 200 is located in the first mounting hole 101, the prechamber body 200 contacts the plane 102, and the plane 102 can limit the prechamber body 200.
In some implementations of the embodiment of the present application, a sealing gasket 207 is further disposed between the prechamber body 200 and the plane 102 to seal between the prechamber body 200 and the first mounting hole 101, so as to prevent gas in the main combustion chamber and the prechamber 201 from leaking, and ensure the performance of the engine.
Referring to fig. 1 and 2, a prechamber 201 is provided inside the prechamber body 200, the prechamber 201 being provided with an opening 203 towards a top wall 202 of the ignition assembly 400, from which opening part of the ignition assembly 400 protrudes into the prechamber 201 for igniting the gas in the prechamber 201. The top wall of the prechamber 201 refers to the upper side wall of the prechamber 201 as in fig. 2.
The prechamber body 200 is also provided with a plurality of air inlets 204 communicating with the prechamber 201. illustratively, each air inlet 204 may be provided in the top wall 202. A plurality of intake ports 204 are provided around the center line of the opening 203, and each intake port 204 communicates with the intake pipe 300. The gas in the intake pipe 300 can enter the prechamber 201 from a plurality of directions around the opening 203 through the intake ports 204, so that the uniformity of the gas in the prechamber 201 during mixing can be improved, the technical problem of poor ignition can be prevented, and the performance of the engine can be ensured.
One end of the prechamber 201 away from the ignition assembly 400, that is, the bottom end of the prechamber 201 is provided with an ignition port 205, the ignition port 205 is used for communicating with the main combustion chamber in the cylinder body, the mixed gas in the main combustion chamber can enter the prechamber through the ignition port 205, and the ignited gas in the prechamber 201 can enter the main combustion chamber through the ignition port 205.
The number of the ignition ports 205 is not particularly limited in the embodiment of the present application. For example, the number of the ignition ports 205 may be multiple, and the multiple ignition ports 205 may be uniformly arranged around the central line of the prechamber 201, so that the ignited gas in the prechamber 201 can uniformly enter the main combustion chamber through the multiple ignition ports 205 in a direction around the central line of the prechamber 201, so as to improve the uniformity of gas combustion in the main combustion chamber, so that the combustion is more sufficient, thereby improving the combustion efficiency of the gas in the main combustion chamber.
Referring to FIG. 1, the ignition assembly 400 is mounted in the first mounting hole 101 and a portion of the ignition assembly 400 extends into the prechamber 201 to ignite the gases within the prechamber 201. Illustratively, ignition assembly 400 includes a spark plug bushing 401 and a spark plug 408 disposed within spark plug bushing 401, with one end of spark plug bushing 401 abutting top wall 202 and a firing end 409 of spark plug 408 extending into opening 203.
Illustratively, the spark plug bushing 401 is provided with a connecting through hole 406, and a spark plug 408 is inserted into the connecting through hole 406. The connecting through hole 406 is further provided with a concave groove 407 at an end facing the prechamber body 200, the concave groove 407 is fitted to the prechamber body 200, a bottom wall of the concave groove 407 abuts against the top wall 202, and the concave groove 407 is configured to cover the prechamber 201 and allow a firing end 409 of the spark plug 408 to protrude into the prechamber 201 through the opening 203.
A first seal ring 208 is further provided between the groove wall of the concave groove 407 and the prechamber body 200 to seal between the plug liner 401 and the prechamber body 200, and prevent gas in the prechamber 201 from leaking from a gap between the plug liner 401 and the prechamber body 200, thereby ensuring engine performance.
For example, referring to fig. 1, a second sealing ring 405 may be further disposed between the spark plug bushing 401 and the first mounting hole 101, and the second sealing ring 405 may be used to seal between the cylinder head body 100 and the spark plug bushing 401 to prevent gas in the main combustion chamber and the prechamber 201 from leaking from a gap between the cylinder head body 100 and the spark plug bushing 401, so as to ensure the performance of the engine.
In some implementations of embodiments of the present application, referring to fig. 2, the spark plug liner 401 has a plurality of first connecting passages 402 extending inward toward one end of the prechamber body 200, each of the intake ports 204 of the prechamber body 200 is disposed on the top wall 202, and each of the first connecting passages 402 communicates with one of the intake ports 204; the intake pipe 300 communicates with each first connecting passage 402. The combustion gases in the intake pipe 300 may enter the prechamber 201 via each first connection channel 402 through the corresponding intake port 204.
The center line of each first connecting channel 402 may be parallel to the center line of the opening 203, or may be inclined with respect to the center line of the opening 203, which is not specifically limited in the embodiment of the present application.
Illustratively, each first connecting passage 402 is disposed around a centerline of the opening 203, and the centerline of each connecting passage 402 is disposed obliquely such that an end of each first connecting passage 402 facing the prechamber body 200 is closer to the centerline of the opening 402 than an end of the first connecting passage 402 facing away from the prechamber body 200. The first connecting channel 402 that the slope set up advances to be able to make in the central line of gas and precombustion chamber 201 is certain contained angle sprays and gets into precombustion chamber 201 for it is more even that gas and gas mixture mix in precombustion chamber 201, further prevents to take place the problem of ignition failure, guarantees that the engine can normal operating.
It is understood that the center line of each first connecting passage 402 and the center line of the opening 203 may be located in the same plane. The central line of each first connecting channel 402 and the central line of the opening 203 can be located in different planes, so that the gas ejected from the first connecting channel 402 can form turbulence in the prechamber 201, thereby further improving the uniformity of mixing with the mixture, preventing the occurrence of poor ignition, and ensuring the normal operation of the engine.
It should be noted that the thickness of the top wall 202 of the prechamber body 200 may be smaller than the thickness of the side wall 206 of the prechamber body 200 adjacent to the top wall 202, and thus the shape of the air inlet 204 can reduce the influence on the flow direction of the fuel gas in the first connecting passage 402, so that the fuel gas and the mixture gas are mixed more uniformly. It is understood that the extending direction of the air inlet 204 may also be the same as the inclined direction of the first connecting channel 402, which is not particularly limited in the embodiment of the present application.
In some implementations of embodiments of the present application, referring to fig. 1 and 2, an annular gas distribution channel 403 may also be disposed within the spark plug bushing 401, a centerline of the gas distribution channel 403 being disposed collinear with a centerline of the opening 203; one end of each first connecting passage 402, which faces away from the prechamber body 200, is communicated with the air distribution passage 403, and the air inlet pipe 300 is communicated with the air distribution passage 403. The gas in the air inlet pipe 300 firstly enters the gas distribution channel 403, and the gas enters each first connecting channel 402 after filling the gas distribution channel 403, so that the gas distribution channel 403 can improve the uniformity of the gas flowing into each first connecting channel 402, and further improve the uniformity of the gas entering the precombustion chamber 201.
Illustratively, the spark plug bushing 401 is further provided with a second connecting passage 404, one end of the second connecting passage 404 is connected to the air distribution passage 403, and the other end of the second connecting passage 404 is communicated with the air inlet pipe 300. The gas in the intake pipe 300 enters the gas distribution passage 403 through the second connection passage 404, and the gas in the gas distribution passage 403 enters the prechamber 201 through each first connection passage 402.
Referring to fig. 1, a second mounting hole 103 is further formed in the cylinder head body 100, the second mounting hole 103 is communicated with the first mounting hole 101, an air inlet pipe 300 is mounted in the second mounting hole 103, and the air inlet pipe 300 is used for inputting fuel gas into the second connecting passage 404.
For example, the intake pipe 300 may have a tubular structure, the intake pipe 300 may have an intake passage 301 provided therein, the intake passage 301 may extend through the intake pipe 300, one end of the intake pipe 300 may be connected to a spark plug bushing 401 to communicate the intake passage 301 with a second connection passage 404, and gas may be introduced into the second connection passage 404 through the intake passage 301.
Illustratively, the inner wall of the end of the second connecting channel 404 connected with the air inlet pipe 300 is set as a first conical surface 410, the outer side of the end of the air inlet pipe 300 connected with the second connecting channel 404 is set as a second conical surface 303, and the first conical surface 410 can be matched with the second conical surface 303 to form conical surface sealing between the air inlet pipe 300 and the spark plug bush 401, so as to improve the sealing performance between the air inlet pipe 300 and the spark plug bush 401, prevent the gas from leaking from the gap between the air inlet pipe 300 and the spark plug bush 401, and ensure the performance of the engine.
In some implementations of the embodiment of the present application, a check valve 302 is disposed between the second connecting passage 404 and the air inlet pipe 300, and the check valve 302 is configured to allow only gas to flow from the air inlet pipe 300 to the second connecting passage 404, so as to prevent gas in the prechamber 201, the first connecting passage 402, the gas distribution passage 403, and the second connecting passage 404 from flowing backward into the air inlet pipe 300, thereby preventing pollution to the gas. Exemplarily, referring to fig. 2, a check valve 302 is installed in an intake passage 301 of an intake pipe 300. It is understood that the check valve 302 may be installed in the second connecting passage 404, as long as the check valve 302 can allow the gas to flow from the intake pipe 300 to the second connecting passage 404, which is not particularly limited in the embodiment of the present invention.
A third sealing ring 307 can be further arranged between the air inlet pipe 300 and the second mounting hole 103, the third sealing ring 307 can seal between the air inlet pipe 300 and the cylinder head body 100, and gas is prevented from leaking from a gap between the air inlet pipe 300 and the cylinder head body 100, so that the performance of the engine is ensured.
In some implementations of embodiments of the present application, the air inlet tube 300 may be mounted within the second mounting hole 103 by a locking sleeve 304. Illustratively, referring to fig. 1, a through hole 305 is formed in the locking sleeve 304, and the locking sleeve 304 is sleeved on an end of the air inlet pipe 300 away from the spark plug bushing 401 through the through hole 305. The outer side of the intake pipe 300 is provided with a third tapered surface 308, and accordingly, the inner wall of the through hole 305 facing the end of the plug bush 401 is provided with a fourth tapered surface 306, and the fourth tapered surface 306 can be fitted with the third tapered surface 308.
The outer circumference of the locking sleeve 304 is provided with external threads, the inner wall of one end of the second mounting hole 103 far away from the first mounting hole 101 is provided with internal threads, the external threads can be in threaded connection with the internal threads, and the external threads and the internal threads can be connected by rotating the locking sleeve 304 so as to install the locking sleeve 304 in the second mounting hole 103. During the rotation of the locking sleeve 304, the fourth tapered surface 306 can push the third tapered surface 308 to move toward the plug bushing 401, so that the second tapered surface 303 of the air inlet tube 300 is tightly fitted with the first tapered surface 410 of the second connection channel 404, thereby locking the air inlet tube 300.
In addition, the third conical surface 308 and the fourth conical surface 306 are matched with each other, so that conical surface sealing can be formed between the locking sleeve 304 and the air inlet pipe 300, the sealing performance between the locking sleeve 304 and the air inlet pipe 300 is improved, the gas in the precombustion chamber 201 can be further prevented from leaking, and the performance of the engine can be further ensured.
It is understood that the air inlet tube 300 may be mounted in the second mounting hole 103 by other methods, such as welding, and the like, which is not particularly limited in the embodiments of the present application.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A cylinder cover assembly is characterized by comprising a cylinder cover body, a pre-combustion chamber body, an air inlet pipe and an ignition component for ignition; the cylinder cover body is provided with a first mounting hole, the ignition assembly and the precombustion chamber body are arranged in the first mounting hole, and the precombustion chamber body is positioned at one end, facing the cylinder body, of the ignition assembly; a pre-combustion chamber is arranged in the pre-combustion chamber body, an opening is formed in the top wall of the pre-combustion chamber body facing the ignition assembly, part of the ignition assembly extends into the opening, and an ignition port used for being communicated with a main combustion chamber in a cylinder body is formed in one end, far away from the ignition assembly, of the pre-combustion chamber body;
the precombustion chamber body is provided with a plurality of air inlets communicated with the precombustion chamber, and the plurality of air inlets are arranged at equal intervals around the central line of the opening; the intake pipe sets up on the cylinder cap body, just the intake pipe with each air inlet intercommunication.
2. The cylinder head assembly of claim 1, wherein said ignition assembly includes a spark plug bushing and a spark plug disposed through said spark plug bushing, one end of said spark plug bushing abutting said top wall, a firing end of said spark plug extending into said opening.
3. The cylinder head assembly of claim 2, wherein each of said intake ports is disposed in said top wall, and wherein an end of said spark plug liner facing said prechamber body has a plurality of first connecting passages extending inwardly therein, each of said first connecting passages communicating with one of said intake ports; the air inlet pipe is communicated with the first connecting passages.
4. The cylinder head assembly of claim 3, wherein a thickness of the prechamber body top wall is less than a thickness of a side wall of the prechamber body adjacent the top wall.
5. The cylinder head assembly of claim 4, wherein each of the first connecting passages is disposed around a centerline of the opening, and the centerline of each of the connecting passages is inclined such that an end of each of the first connecting passages facing toward the prechamber body is closer to the centerline of the opening than an end of the first connecting passage facing away from the prechamber body.
6. The cylinder head assembly of claim 5, wherein a centerline of each of said first connecting passages lies in a same plane as a centerline of said opening;
alternatively, a center line of each of the first connecting passages and a center line of the opening are located in different planes.
7. The cylinder head assembly according to any one of claims 3 to 6, wherein an annular air distribution passage is further provided in the spark plug bush, and a center line of the air distribution passage is arranged in line with a center line of the opening; and one end of each first connecting channel, which is deviated from the precombustion chamber body, is communicated with the gas distribution channel, and the gas inlet pipe is communicated with the gas distribution channel.
8. The cylinder head assembly according to claim 7, wherein a second connecting passage is further provided on the spark plug bush, one end of the second connecting passage is connected to the air distribution passage, and the other end of the second connecting passage is communicated with the intake pipe.
9. The cylinder head assembly of claim 8, wherein a one-way valve is disposed between the second connecting passage and the intake pipe, the one-way valve being configured to allow only gas to flow from the intake pipe to the second connecting passage.
10. An engine comprising a cylinder head assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115355081A (en) * | 2022-10-14 | 2022-11-18 | 潍柴动力股份有限公司 | Precombustion chamber and cylinder cover |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115355081A (en) * | 2022-10-14 | 2022-11-18 | 潍柴动力股份有限公司 | Precombustion chamber and cylinder cover |
| CN115355081B (en) * | 2022-10-14 | 2023-03-21 | 潍柴动力股份有限公司 | Precombustion chamber and cylinder cover |
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