Low-emission eruption-prevention silencer for gasoline engine and gasoline engine
By designing a low-emission fire-breathing anti-fire silencer including a silencer housing, a middle partition, a Mars capture net and a three-way catalyst, the problem of exhaust gas fire-breathing in small general-purpose gas engines is solved, effective noise reduction and flame reduction of exhaust gases is achieved, and safety is improved.
Patent Information
- Application Number
- CN202422200032.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-06
AI Technical Summary
When the existing small general-purpose gasoline engine mufflers use three-way catalysts to purify the exhaust gas, they are prone to high temperatures, redness and fire spitting, resulting in safety hazards.
A low-row anti-fire silencer is designed, including a silencer housing, a mid-dividing plate, a Mars capture net and a three-way catalyst. The muffler housing is divided into an air inlet and an exhaust port. The middle partition divides its internal space into an expansion chamber and a resonant cavity. The three-way catalyst is set in the ventilation port of the middle partition, and the Mars capture net is installed at the exhaust port.
Through this design, the high-speed and high-temperature exhaust gas discharged from the gasoline engine can effectively reduce noise and flame after being treated with three-way catalyst reaction and silenced in the resonant cavity, avoiding impact on the outside and improving safety.
Smart Images
Figure CN223018712U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of small general gasoline engines, and more specifically, to a low-emission and anti-flameout muffler for gasoline engines and a gasoline engine. Background Technique
[0002] When a small general gasoline engine works, it will discharge a large amount of exhaust gas generated after combustion. At present, the environmental protection efforts are continuously increasing, and environmental protection regulations have been formulated. The regulations require that the exhaust gas discharged by the small general gasoline engine be treated before it can be discharged. Therefore, a three-way catalyst needs to be used inside the muffler to perform secondary treatment on the exhaust gas discharged by the small general gasoline engine to meet the requirements of environmental protection regulations.
[0003] However, due to the imperfect layout inside the currently commonly used muffler, the three-way catalyst generates high temperature, glows red, and spits fire from the exhaust port of the muffler during the purification of exhaust gas, resulting in potential safety hazards to the surrounding environment when the small general gasoline engine is working. Content of the Utility Model
[0004] The purpose of the utility model is to provide a low-emission and anti-flameout muffler for gasoline engines and a gasoline engine to alleviate the technical problem of flameout in the tail exhaust of small general gasoline engines in the prior art.
[0005] In a first aspect, an embodiment of the utility model provides a low-emission and anti-flameout muffler for gasoline engines, which includes a muffler housing, a middle partition, a spark arrestor net, and a three-way catalyst;
[0006] One end of the muffler housing is provided with an air inlet, and the other end is provided with an exhaust port;
[0007] The middle partition is arranged in the muffler housing, and the middle partition divides the space inside the muffler housing into an expansion chamber and a resonance chamber. The expansion chamber is communicated with the air inlet, and the resonance chamber is connected with the exhaust port;
[0008] The three-way catalyst is arranged in the first ventilation port of the middle partition, and the spark arrestor net is installed at the exhaust port of the muffler housing.
[0009] Combined with the first aspect, an embodiment of the utility model provides a possible implementation manner of the first aspect, wherein the muffler housing includes a front cover and a rear cover;
[0010] The front cover and the rear cover are connected by a connecting rod. The air inlet is arranged on the front cover, and the exhaust port is arranged on the rear cover.
[0011] Combined with the first aspect, an embodiment of the utility model provides a possible implementation manner of the first aspect, wherein a catalyst air inlet cover is arranged on the middle partition, and the catalyst air inlet cover corresponds to the first ventilation port;
[0012] The catalyst intake hood is located within the expansion chamber.
[0013] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect, wherein a plurality of intake hood through-holes are formed in the catalyst intake hood.
[0014] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect, wherein a catalyst exhaust plate is arranged in the resonance chamber;
[0015] A second ventilation opening is formed at the top of the catalyst exhaust plate.
[0016] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect, wherein a catalyst arc plate is arranged on the catalyst exhaust plate, and the catalyst arc plate corresponds to the first ventilation opening.
[0017] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect, wherein an inner deflector is arranged in the resonance chamber, and the inner deflector is located between the rear cover and the catalyst exhaust plate;
[0018] A third ventilation opening is formed at the bottom of the inner deflector;
[0019] An I-shaped groove is formed in the inner deflector.
[0020] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect, wherein an outer deflector is arranged at the exhaust port of the rear cover, and the outer deflector can cover the spark arrestor net.
[0021] In combination with the first aspect, an embodiment of the present utility model provides a possible implementation manner of the first aspect, wherein a silencer heat insulation cover is arranged on the rear cover.
[0022] In a second aspect, an embodiment of the present utility model provides a gasoline engine, including the low-emission anti-flameout silencer for gasoline engines.
[0023] Advantageous effects:
[0024] The present utility model provides a low-emission anti-flameout silencer for gasoline engines, including a silencer housing, a middle partition plate, a spark arrestor net, and a three-way catalyst; an air inlet is formed at one end of the silencer housing, and an exhaust port is formed at the other end; the middle partition plate is arranged in the silencer housing, and the middle partition plate divides the space in the silencer housing into an expansion chamber and a resonance chamber, the expansion chamber is communicated with the air inlet, and the resonance chamber is connected with the exhaust port; the three-way catalyst is arranged in the first ventilation opening of the middle partition plate, and the spark arrestor net is installed at the exhaust port of the silencer housing.
[0025] Specifically, the high-speed and high-temperature exhaust gas discharged from the gasoline engine enters the expansion cavity through the air inlet of the muffler housing. The exhaust gas will undergo a reaction treatment by the three-way catalyst, then enter the resonance cavity for silencing, and finally be discharged from the exhaust port of the muffler housing. Before being discharged, the exhaust gas will pass through the spark arrestor net and then be discharged. Through this setting, the high-speed and high-temperature exhaust gas discharged from the gasoline engine is noise-reduced and flame-extinguished, without causing any impact on the outside.
[0026] The present utility model provides a gasoline engine, including a low-emission and anti-flame-spouting muffler for gasoline engines. The gasoline engine has the above-mentioned advantages compared with the prior art, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0028] Figure 1 Schematic diagram of the low-emission and anti-flame-spouting muffler for gasoline engines provided by the embodiment of the present utility model;
[0029] Figure 2 Cross-sectional view of the low-emission and anti-flame-spouting muffler for gasoline engines provided by the embodiment of the present utility model;
[0030] Figure 3 First angle of the exploded view of the low-emission and anti-flame-spouting muffler for gasoline engines provided by the embodiment of the present utility model;
[0031] Figure 4 Second angle of the exploded view of the low-emission and anti-flame-spouting muffler for gasoline engines provided by the embodiment of the present utility model;
[0032] Figure 5 Schematic diagram of the air flow direction of the low-emission and anti-flame-spouting muffler for gasoline engines provided by the embodiment of the present utility model.
[0033] ICON:
[0034] 100 - Muffler housing; 101 - Air inlet; 102 - Exhaust port; 103 - Expansion cavity; 104 - Resonance cavity; 110 - Front cover; 120 - Rear cover; 130 - Connecting rod;
[0035] 200 - Middle partition; 210 - First ventilation opening; 220 - Catalyst air inlet cover; 221 - Air inlet cover through hole;
[0036] 300 - Spark arrestor net;
[0037] 400 - three-way catalyst;
[0038] 500 - catalyst exhaust plate; 510 - second vent; 520 - catalyst arc plate;
[0039] 600 - inner guide plate; 610 - third vent; 620 - I-shaped groove;
[0040] 700 - external deflector;
[0041] 800 - Muffler heat shield. DETAILED DESCRIPTION
[0042] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0043] 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.
[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0045] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0046] The present utility model will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0047] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in
[0048] , this embodiment provides a low-emission anti-flameout muffler for a gasoline engine, including a muffler housing 100, a middle partition 200, a spark arrestor net 300, and a three-way catalyst 400; an air inlet 101 is provided at one end of the muffler housing 100, and an exhaust port 102 is provided at the other end; the middle partition 200 is disposed in the muffler housing 100, and the middle partition 200 divides the space inside the muffler housing 100 into an expansion chamber 103 and a resonance chamber 104. The expansion chamber 103 is communicated with the air inlet 101, and the resonance chamber 104 is connected to the exhaust port 102; the three-way catalyst 400 is disposed in the first ventilation port 210 of the middle partition 200, and the spark arrestor net 300 is installed at the exhaust port 102 of the muffler housing 100.
[0049] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in
[0050] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In an alternative embodiment of this embodiment, a catalyst air inlet hood 220 is provided on the middle partition 200, and the catalyst air inlet hood 220 corresponds to the first ventilation port 210; the catalyst air inlet hood 220 is located in the expansion chamber 103.
[0051] See Figure 1 , Figure 2 , Figure 3 ,Figure 4 and Figure 5 As shown in ,
[0052] , in an alternative solution of this embodiment, a plurality of intake hood through-holes 221 are formed in the catalyst intake hood 220.
[0052] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in ,
[0053] , Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , in an alternative solution of this embodiment, a catalyst exhaust plate 500 is disposed in the resonance cavity 104; a second ventilation port 510 is formed at the top of the catalyst exhaust plate 500.
[0053] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in ,
[0054] , in an alternative solution of this embodiment, a catalyst arc plate 520 is disposed on the catalyst exhaust plate 500, and the catalyst arc plate 520 corresponds to the first ventilation port 210.
[0054] Specifically, the catalyst arc plate 520 can disperse the airflow, reduce the impact force of the airflow, improve the reaction effect of the three-way catalyst 400, and reduce the whistling sound by reducing the speed of the airflow passing through the three-way catalyst 400.
[0055] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in ,
[0056] , Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , in an alternative solution of this embodiment, an inner flow guide plate 600 is disposed in the resonance cavity 104, and the inner flow guide plate 600 is located between the rear cover 120 and the catalyst exhaust plate 500; a third ventilation port 610 is formed at the bottom of the inner flow guide plate 600; an I-shaped groove 620 is formed on the inner flow guide plate 600.
[0056] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in ,
[0057] , in an alternative solution of this embodiment, an outer flow guide plate 700 is disposed at the exhaust port 102 of the rear cover 120, and the outer flow guide plate 700 can cover the spark arrestor net 300.
[0057] Specifically, the high-speed and high-temperature exhaust gas discharged by the gasoline engine enters the expansion chamber 103 through the first vent 210 of the front cover 110, and then the high-speed and high-temperature exhaust gas hits the curved surface of the catalyst intake cover 220, causing the high-speed and high-temperature exhaust gas to be diverted, and then the dispersed high-speed and high-temperature exhaust gas converges again to pass through the three-way catalyst 400, and the high-speed and high-temperature exhaust gas will react in the process of passing through the three-way catalyst 400, and the purified gas after the reaction hits the catalyst curved plate 520 on the catalyst exhaust plate 500, at this time, the purified gas generates a secondary diversion on the catalyst curved plate 520, and then flows to the inner guide plate 600 through the second vent 510 on the catalyst exhaust plate 500, the purified gas flows along the I-shaped groove 620 of the inner guide plate 600, and then reaches the rear cover 120 through the third vent 610 of the inner guide plate 600, and then enters the outer guide plate 700 from the exhaust port 102 of the rear cover 120 through the spark capture net 300, and then is discharged from the outer guide plate 700.
[0058] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in an optional solution of this embodiment, a muffler heat shield 800 is provided on the rear cover 120 .
[0059] Specifically, the muffler heat insulation cover 800 is disposed on the outer wall of the rear cover 120 , and the muffler heat insulation cover 800 can completely cover the peripheral surface of the rear cover 120 , insulate the rear cover 120 , and avoid scalding the user.
[0060] This embodiment provides a gasoline engine, including a low-emission flame-proof muffler for the gasoline engine.
[0061] Specifically, the gasoline engine provided by this embodiment has the advantages of the above-mentioned low-emission flame-proof muffler for gasoline engine compared with the prior art, which will not be described in detail here.
[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A low-emission flame-proof muffler for a gasoline engine, characterized in that: include: A muffler housing (100), a middle partition (200), a spark capture net (300) and a three-way catalyst (400); The muffler housing (100) has an air inlet (101) at one end and an air outlet (102) at the other end; The middle partition (200) is arranged in the muffler housing (100), and the middle partition (200) divides the space in the muffler housing (100) into an expansion chamber (103) and a resonance chamber (104), wherein the expansion chamber (103) is communicated with the air inlet (101), and the resonance chamber (104) is connected with the air outlet (102); The three-way catalyst (400) is arranged in the first ventilation port (210) of the middle partition (200), and the spark catching net (300) is installed at the exhaust port (102) of the muffler housing (100).
2. The low-emission flame-proof muffler for gasoline engine according to claim 1, characterized in that: The muffler housing (100) comprises a front cover (110) and a rear cover (120); The front cover (110) and the rear cover (120) are connected via a connecting rod (130); the air inlet (101) is provided on the front cover (110); and the air outlet (102) is provided on the rear cover (120).
3. The low-emission flame-proof muffler for a gasoline engine according to claim 2, characterized in that: The middle partition plate (200) is provided with a catalyst air inlet cover (220), and the catalyst air inlet cover (220) corresponds to the first vent (210); The catalyst air intake cover (220) is located in the expansion chamber (103).
4. The low-emission flame-proof muffler for a gasoline engine according to claim 3, characterized in that: The catalyst air intake cover (220) is provided with a plurality of air intake cover through holes (221).
5. The low-emission flame-proof muffler for a gasoline engine according to claim 4, characterized in that: A catalyst exhaust plate (500) is arranged in the resonance cavity (104); A second vent (510) is provided on the top of the catalyst exhaust plate (500).
6. The low-emission flame-proof muffler for a gasoline engine according to claim 5, characterized in that: A catalyst arc plate (520) is provided on the catalyst exhaust plate (500), and the catalyst arc plate (520) corresponds to the first vent (210).
7. The low-emission flame-proof muffler for a gasoline engine according to claim 6, characterized in that: An inner guide plate (600) is provided in the resonant cavity (104), and the inner guide plate (600) is located between the rear cover (120) and the catalyst exhaust plate (500); A third vent (610) is provided at the bottom of the inner guide plate (600); The inner guide plate (600) is provided with an I-shaped groove (620).
8. The low-emission flame-proof muffler for a gasoline engine according to claim 7, characterized in that: An outer guide plate (700) is provided at the exhaust port (102) of the rear cover (120), and the outer guide plate (700) can be covered on the spark capture net (300).
9. The low-emission flame-proof muffler for a gasoline engine according to claim 8, characterized in that: The rear cover (120) is provided with a muffler heat insulation cover (800).
10. A gasoline engine, characterized in that: The invention comprises the low-emission flame-proof muffler for a gasoline engine as claimed in any one of claims 1 to 9.