Vehicle exhaust system and automobile
By introducing a floating valve sleeve and a pressure sensor into the vehicle exhaust system, the sealing valve is automatically switched, the water backflow problem is solved, the muffler and three-way catalyst are protected, and the safety and applicability of the vehicle in the wading section are improved.
Patent Information
- Application Number
- CN202422253725.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing vehicle exhaust system cannot effectively prevent water from pouring back into the muffler and three-way catalyst when wading through the water section, resulting in damage.
A vehicle exhaust system is designed, including a muffler assembly and a sealing valve. The floating valve sleeve is used to switch the sealing and breathable positions under the action of water buoyancy to prevent water from pouring back, including the floating valve sleeve, valve spool and air pressure sensor, to achieve automatic sealing and breathable state switching.
Effectively prevent water from pouring back into the muffler and three-way catalyst, protect the engine, improve the safety and applicability of the vehicle in the wading sections, and prevent damage.
Smart Images
Figure CN223075612U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of vehicle exhaust systems, in particular to a vehicle exhaust system and an automobile in a wading section or a floating mode.
Background Art
[0002] The function of the exhaust system on a vehicle is to eliminate engine exhaust noise and purify exhaust gas. The exhaust systems in related technologies do not have a waterproof function. When the vehicle enters a section with relatively deep water accumulation, due to the low position of the exhaust pipe muffler, water easily enters the muffler through the exhaust tailpipe and eventually invades the three-way catalytic converter or the engine at the front end of the exhaust system, causing damage to the three-way catalytic converter or the engine.
Content of the Utility Model
[0003] This application provides a vehicle exhaust system and an automobile. When water enters the muffler of the vehicle, the sealing valve of the vehicle exhaust system can be closed and opened, so as to enhance the safety and applicability of the vehicle in a wading section or a floating mode, and prevent water from flowing back into the catalytic converter or even the engine, resulting in pollution and damage to the catalytic converter or even the engine.
[0004] An embodiment of this application provides a vehicle exhaust system. The vehicle exhaust system includes a muffler assembly, and the muffler assembly includes a muffler body, a muffler inlet pipe, and a muffler outlet pipe;
[0005] The vehicle exhaust system further includes a sealing valve, and the sealing valve includes a valve core and a floating valve sleeve; the valve core is connected to the muffler inlet pipe;
[0006] The floating valve sleeve moves axially up and down relative to the valve core, and the floating valve sleeve has a switchable sealing position and a breathable position; the floating valve sleeve includes a first housing and a second housing, and the first housing and the second housing are connected to form a sealed floating cavity; the second housing includes a sealing section, and ventilation holes are provided on the side wall of the sealing section; when the floating valve sleeve moves to the sealing position under the buoyancy of water, the sealing section is hermetically connected to the outer wall of the valve core, and when the floating valve sleeve moves to the breathable position, the second housing is connected to the outer wall of the valve core with a clearance fit.
[0007] In one embodiment, the sealing section of the second housing is located in the middle of the floating valve sleeve, and the inner diameter of the sealing section gradually decreases in a direction away from the muffler inlet pipe.
[0008] In one embodiment, the first housing and the second housing are connected to form a sealed floating cavity, and the floating cavity is located at the bottom end of the floating valve sleeve.
[0009] In one embodiment, both the first housing and the second housing are in the shape of an open cup. The bottom wall of the second housing is hermetically connected to the side wall of the first housing to form the floating chamber. The bottom wall of the second housing protrudes away from the bottom wall of the first housing, and a portion of the side wall of the second housing close to the first housing forms the sealing section.
[0010] In one embodiment, the valve core includes a connected guiding portion and a sealing portion. The guiding portion is connected to one end of the muffler inlet pipe, and the sealing portion has an inclined sealing surface. When the floating valve sleeve moves to the sealing position, the sealing surface is hermetically connected to the inner side wall of the sealing section.
[0011] In one embodiment, a limiting boss is provided at the connection between the guiding portion and the sealing portion. A guiding section is provided at one end of the second housing away from the sealing section, and the guiding section is spaced and cooperates with the guiding portion; an anti - detachment boss is provided on the guiding section. When the floating valve sleeve moves under the buoyancy of water, the limiting boss cooperates with the anti - detachment boss.
[0012] In one embodiment, the muffler inlet pipe is provided with a flange, and the valve core is connected to the muffler inlet pipe.
[0013] In one embodiment, the muffler body is provided with a water leakage hole, and the water leakage hole is located at a position of the muffler body close to the ground.
[0014] In one embodiment, the vehicle exhaust system further includes a pressure sensor connected to the vehicle control center; the pressure sensor is installed on the muffler inlet pipe. When the pressure sensor detects that the air pressure in the muffler inlet pipe exceeds a preset value, the engine is shut down.
[0015] This application also provides an automobile, which includes the above - mentioned vehicle exhaust system applicable thereto.
[0016] After adopting the above - mentioned technical solutions, the beneficial effects are as follows:
[0017] When the vehicle enters a wading section or activates the floating mode, a large amount of water floods into the muffler body. The floating valve sleeve moves upward as the water level rises. The sealing surface of the floating valve sleeve blocks the side wall of the valve core, reaching a preliminary sealing state of the muffler inlet pipe. As the water level continues to rise and the upward force of the floating chamber increases, a more airtight sealing state is achieved between the floating valve sleeve and the valve core. When the vehicle leaves the wading section or deactivates the floating mode, the water in the muffler body can be discharged, and the floating valve sleeve automatically moves downward under gravity, and the sealing valve resets to the breathable position, thereby realizing the switching between the sealing state and the breathable state between the floating valve sleeve and the valve core, improving the wading ability of the vehicle, and preventing damage to the three - way catalytic converter or the engine caused by water backflow in the vehicle exhaust pipe muffler.
Description of the Drawings
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0019] Figure 1 It is a schematic structural diagram of a vehicle exhaust system provided by an embodiment of the present application.
[0020] Figure 2 It is a schematic diagram of the open state of a sealing valve of a vehicle exhaust system provided by an embodiment of the present application.
[0021] Figure 3 It is a schematic diagram of the valve core structure of a vehicle exhaust system provided by an embodiment of the present application.
[0022] Figure 4 It is a schematic diagram of the floating valve sleeve structure of a vehicle exhaust system provided by an embodiment of the present application.
[0023] Figure 5 It is a partial schematic diagram of the closed state of a sealing valve of a vehicle exhaust system provided by an embodiment of the present application.
[0024] Figure 6 It is a schematic diagram of the closed state of a sealing valve of a vehicle exhaust system provided by an embodiment of the present application.
[0025] Reference numerals:
[0026] 100 - Vehicle exhaust system;
[0027] 10 - Muffler assembly;
[0028] 11 - Muffler body; 12 - Flange; 13 - Muffler inlet pipe; 14 - Muffler outlet pipe; 15 - Pressure sensor; 16 - Leakage hole;
[0029] 40 - Sealing valve;
[0030] 41 - Valve core;
[0031] 411 - Guide part; 412 - Limit boss; 413 - Sealing part, 414 - Sealing surface;
[0032] 42 - Floating valve sleeve;
[0033] 421 - Guide section; 422 - Anti - detachment boss; 423 - Sealing section; 424 - Vent hole; 425 - Clearance section;
[0034] 44 - First housing;
[0035] 45 - Second housing;
[0036] 46 - Floating chamber;
[0037] 8 - Vehicle control center.
Detailed implementation manners
[0038] For a better understanding of the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0039] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.
[0040] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.
[0041] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.
[0042] The embodiments of this application provide a vehicle exhaust system 100, Figure 1 which is a schematic structural diagram of a vehicle exhaust system provided by the embodiments of this application, Figure 2 which is a schematic diagram of the open state of the sealing valve of a vehicle exhaust system provided by the embodiments of this application, Figure 3 which is a schematic diagram of the valve core structure of a vehicle exhaust system provided by the embodiments of this application, Figure 4 which is a schematic diagram of the floating valve sleeve structure of a vehicle exhaust system provided by the embodiments of this application, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown. The vehicle exhaust system 100 includes a muffler assembly 10 and a sealing valve 40;
[0043] The muffler assembly 10 includes a muffler body 11, a flange 12, a muffler inlet pipe 13 and a muffler outlet pipe 14. The sealing valve 40 includes a valve core 41 and a floating valve sleeve 42, and the valve core 41 is connected to the muffler inlet pipe 13.
[0044] Among them, the floating valve sleeve 42 moves axially up and down relative to the valve core 41, and the floating valve sleeve 42 has switchable sealing positions and ventilation positions; the floating valve sleeve 42 includes a first housing 44 and a second housing 45, and the first housing 44 and the second housing 45 are connected to form a sealed floating chamber 46; the second housing 45 includes a sealing section 423, and ventilation holes 424 are provided on the side wall of the sealing section 423; when the floating valve sleeve 42 moves to the sealing position under the buoyancy of water, the sealing section 423 is sealingly connected to the outer wall of the valve core 41, and when the floating valve sleeve 42 moves to the ventilation position, the second housing 45 is connected to the outer wall of the valve core 41 with a clearance fit.
[0045] In the above solution, when the vehicle enters a wading section or activates the floating mode, a large amount of water is poured into the muffler body 11, and the floating valve sleeve 42 moves upward as the water level rises. The sealing section 423 of the floating valve sleeve 42 blocks the side wall of the valve core 41, reaching the preliminary sealing state of the muffler intake pipe 13. As the water level continues to rise and the upward force of the floating chamber increases, a more airtight sealing state is achieved between the floating valve sleeve 42 and the valve core 41. When the vehicle leaves the wading section or deactivates the floating mode, the water in the muffler body 11 can be discharged, and the floating valve sleeve 42 automatically moves downward under gravity and resets to the ventilation position. At this time, the second housing 45 is in clearance fit with the outer wall of the valve core 41, thereby realizing the switching between the sealing state and the ventilation state between the floating valve sleeve 42 and the valve core 41. The vehicle exhaust system provided by the present application can improve the wading ability of the vehicle and prevent damage to the three-way catalytic converter or engine of the vehicle due to water backflow into the muffler of the vehicle exhaust pipe.
[0046] Please continue to refer to Figure 1 , the muffler assembly 10 includes a muffler body 11, a flange 12, a muffler intake pipe 13, and a muffler outlet pipe 14.
[0047] The muffler body 11 is a cavity structure. In some embodiments, the muffler body 11 can be cylindrical, or can be a conical cylinder, other regular shapes or irregular shape structures, as long as it can achieve the functions of exhaust and noise reduction. One end of the muffler body 11 is provided with a muffler intake pipe 13, and the other end is provided with a muffler outlet pipe 14. In order to facilitate the connection between the muffler body 11 and the three-way catalytic converter (not shown) of the vehicle, the muffler intake pipe 13 is provided with a flange 12.
[0048] In some embodiments, the muffler body 11 is further provided with a water leakage hole 16, and the water leakage hole 16 is a through hole located at a position of the muffler body 11 close to the ground. When a small amount of water enters the muffler body 11, the water can be discharged from the water leakage hole 16.
[0049] Please continue to refer to Figure 2, the sealing valve 40 includes a valve core 41 and a floating valve sleeve 42. The valve core 41 is connected to one end of the muffler intake pipe 13 away from the three-way catalytic converter. In some specific embodiments, the valve core 41 can be connected to the three-way catalytic converter by welding. The welding method can be, for example, laser welding, ultrasonic welding, etc., as long as the connection is stable and there is no air or water leakage, which is not limited herein.
[0050] Please continue to refer to Figures 3 to 6 , the valve core 41 includes a guiding portion 411, a limiting boss 412, and a sealing portion 413. The valve core 41 is a hollow cylindrical structure with openings at both ends. Among them, the guiding portion 411 is located at the upper part of the valve core 41, the limiting boss 412 is located in the middle of the valve core 41, and the sealing portion 413 is located at the lower part of the valve core 41.
[0051] In some embodiments, the guiding portion 411 is a straight cylindrical structure, and the outer diameter of the guiding portion 411 remains unchanged. In other embodiments, the guiding portion 411 can also be a cylindrical structure with a narrower upper part and a wider lower part, a wider upper part and a narrower lower part, or other shapes, which is not limited herein. The upper end of the guiding portion 411 is connected to the end of the muffler intake pipe 13 close to the ground, and the lower end of the guiding portion 411 is connected to the limiting boss 412.
[0052] The limiting boss 412 is located in the middle of the valve core 41. The upper end of the limiting boss 412 is connected to the lower end of the guiding portion 411, and the lower end of the limiting boss 412 is connected to the upper end of the sealing portion 413. In some embodiments, the limiting boss 412 is an annular inclined surface step connecting the guiding portion 411 and the sealing portion 413. The presence of the annular inclined surface step can prevent the floating valve sleeve 42 from detaching from the valve core 41 during the up and down movement of the floating valve sleeve 42 along the valve core 41, playing a limiting role.
[0053] In some embodiments, the surface of the limiting boss 412 has an inclined angle with the central axis of the valve core 41, and the diameter of the upper end of the limiting boss 412 is smaller than the diameter of the lower end of the limiting boss 412.
[0054] As Figure 3 shown, the sealing portion 413 of the valve core 41 is located at the lower part of the valve core 41. The sealing portion 413 is a conical cylindrical structure and is integrally formed with the guiding portion 411 and the limiting boss 412. The outer diameter of the sealing portion 413 on the side close to the guiding portion 411 is larger than the outer diameter of the sealing portion 413 on the side away from the guiding portion 411. In this way, during the vehicle wading process, the floating valve sleeve 42 moves upward under the buoyancy of water. Due to the upper wide and lower narrow shape of the sealing portion 413, the sealing connection between the floating valve sleeve 42 and the sealing portion 413 gradually becomes tight during the movement, thus achieving the best sealing state.
[0055] Specifically, the outer wall of the sealing portion 413 has a sealing surface 414. In some embodiments, the sealing surface 414 is a conical sealing surface, which is conducive to the up-and-down movement of the floating valve sleeve 42.
[0056] As Figure 2 and Figure 5 shown, the floating valve sleeve 42 is sleeved on the valve core 41. The floating valve sleeve 42 can move up and down axially relative to the valve core 41. The floating valve sleeve 42 has switchable sealing positions and venting positions.
[0057] The floating valve sleeve 42 includes a first housing 44 and a second housing 45. Both the first housing 44 and the second housing 45 are in the shape of an open cup. The second housing 45 is clamped at the cup mouth of the first housing 44. The bottom wall of the second housing 45 is hermetically connected to the side wall of the first housing 44 to form a floating cavity 46. As Figure 4 shown, the floating cavity 46 is located at the bottom end of the first housing 44, and the floating cavity 46 is in a sealed state.
[0058] In some embodiments, the floating cavity 46 is a drum-shaped cavity. In order to increase the cavity space of the floating cavity 46 and thus increase the buoyancy of the floating valve sleeve 42, the bottom wall of the second housing 45 bulges away from the bottom wall of the first housing 44 to form a boss-like structure, which can increase the cavity space of the floating cavity 46. The second housing 45 includes a guiding section 421, an anti-detachment boss 422, a middle clearance section 425, and a lower sealing section 423.
[0059] In some embodiments, the guiding section 421 is in a straight cylindrical shape, and the inner diameter of the guiding section 421 is smaller than the inner diameter of the clearance section 425, presenting an inwardly tapered structure.
[0060] One end of the clearance section 425 is connected to the guiding section 421, and the other end is connected to the sealing section 423.
[0061] A part of the side wall of the second housing 45 close to the first housing 44 forms a sealing section 423. The sealing section 423 is in a conical cylindrical structure. The inner diameter of the sealing section 423 at one end close to the clearance section 425 is larger than the inner diameter of the sealing section 423 at the end far from the middle clearance section 425, that is, it is in a state of being wider at the top and narrower at the bottom. In the present application, as Figure 4 shown, the side wall of the sealing section 423 is provided with vent holes 424. The vent holes 424 are two or more through holes penetrating the side wall. The vent holes 424 are radially distributed on the side wall of the sealing section 423. In some embodiments, the vent holes 424 can be circular holes, oval holes, square holes or any other shape. The vent holes 424 can be symmetrically distributed along the side wall of the sealing section 423, so that the overall structure of the floating valve sleeve 42 is more stable under the action of gas during the air outlet process.
[0062] A anti - detachment boss 422 is provided at the connection of the guiding section 421 and the clearance section 425. One end of the anti - detachment boss 422 is connected to the lower end of the guiding section 421, and the other end is connected to the upper end of the clearance section 425. In some embodiments, the anti - detachment boss 422 is an annular inclined - plane step connecting the guiding section 421 and the clearance section 425. The surface of the anti - detachment boss 422 has an inclined angle with the central axis of the floating valve sleeve 42, and the diameter of the upper end of the anti - detachment boss 422 is smaller than the diameter of the lower end of the anti - detachment boss 422.
[0063] In some embodiments, the length of the guiding section 421 is less than the length of the guiding part 411 of the valve core 41. The inner diameter of the guiding section 421 is larger than the outer diameter of the guiding part 411, and the guiding section 421 and the guiding part 411 form a clearance fit and a sliding - connection structure.
[0064] The materials of the floating valve sleeve 42 and the valve core 41 can be metal materials such as iron, stainless steel, and aluminum or non - metal materials respectively. The welding method between the first shell 44 and the second shell 45 of the floating valve sleeve 42 can adopt laser welding or other welding methods.
[0065] In the above - mentioned technical solution, the cup - shaped floating valve sleeve 42 is provided with a drum - shaped fully - enclosed floating cavity 46, which can rise under the buoyancy of water and move under the action of gravity. Its structure is simple, easy to operate, and has low cost.
[0066] In some embodiments, the air - pressure sensor 15 is installed on the air - intake pipe 13 of the muffler body 11 outside the muffler body 11. The detection end of the air - pressure sensor 15 penetrates the pipe wall of the air - intake pipe 13 of the muffler, so as to sense the change of the air pressure in the air - intake pipe 13 of the muffler. The output end of the air - pressure sensor 15 is connected to the vehicle control center 8.
[0067] In the case where the sealing valve 40 cannot automatically reset under the influence of the water - involved environment, parameters can be preset through the vehicle control center 8. When the engine is started next time, by running the engine to increase the pressure in the air - intake pipe 13 of the muffler, the floating valve sleeve 42 is pushed downward to reach the reset state, and the vehicle can drive normally.
[0068] In the above - mentioned technical solution, when the vehicle wades through water or is in the floating - water mode, after the floating valve sleeve 42 moves to the sealing position under the action of buoyancy, the sealing valve 40 closes, cutting off the passage between the air - intake pipe 13 of the muffler and the three - way catalytic converter, avoiding damage to the vehicle's three - way catalytic converter and even the engine caused by water entry. When the vehicle leaves the water - wading area, the sealing valve 40 moves to the breathable position under the action of gravity or exhaust air pressure, opening the passage between the air - intake pipe 13 of the muffler and the three - way catalytic converter, and the vehicle can drive normally. The vehicle exhaust system and its sealing valve 40 have a simple structure, clear principle, stable working state, can meet the working modes of the vehicle when wading through water and in normal times, and have low cost and convenient maintenance.
[0069] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the present utility model.
Claims
1. A vehicle exhaust system, characterized in that, The vehicle exhaust system includes a muffler assembly, and the muffler assembly includes a muffler body, a muffler inlet pipe, and a muffler outlet pipe; The vehicle exhaust system further includes a sealing valve, and the sealing valve includes a valve core and a floating valve sleeve; the valve core is connected to the muffler inlet pipe; The floating valve sleeve moves axially up and down relative to the valve core, and the floating valve sleeve has a switchable sealing position and a breathable position; the floating valve sleeve includes a first housing and a second housing, and the first housing is connected to the second housing to form a sealed floating cavity; the second housing includes a sealing section, and air holes are provided on the side wall of the sealing section; when the floating valve sleeve moves to the sealing position under the buoyancy of water, the sealing section is hermetically connected to the outer wall of the valve core, and when the floating valve sleeve moves to the breathable position, the second housing is connected to the outer wall of the valve core with a clearance fit.
2. The vehicle exhaust system according to claim 1, characterized in that, The sealing section of the second housing is located in the middle of the floating valve sleeve, and the inner diameter of the sealing section gradually decreases in the direction away from the muffler inlet pipe.
3. The vehicle exhaust system according to claim 1, characterized in that, The first housing and the second housing are connected to form a sealed floating cavity, and the floating cavity is located at the bottom end of the floating valve sleeve.
4. The vehicle exhaust system according to claim 3, wherein, Both the first housing and the second housing are in the shape of an open cup, and the bottom wall of the second housing is hermetically connected to the side wall of the first housing to form the floating cavity. The bottom wall of the second housing protrudes away from the bottom wall of the first housing, and a part of the side wall of the second housing close to the first housing forms the sealing section.
5. The vehicle exhaust system according to claim 2, wherein, The valve core includes a guiding part and a sealing part connected to each other. The guiding part is connected to one end of the muffler inlet pipe, and the sealing part has an inclined sealing surface. When the floating valve sleeve moves to the sealing position, the sealing surface is hermetically connected to the inner side wall of the sealing section.
6. The vehicle exhaust system according to claim 5, characterized in that, A limiting boss is provided at the connection between the guiding part and the sealing part. A guiding section is provided at one end of the second housing away from the sealing section, and the guiding section is spaced and fitted with the guiding part; an anti - detachment boss is provided on the guiding section, and when the floating valve sleeve moves under the buoyancy of water, the limiting boss cooperates with the anti - detachment boss.
7. The vehicle exhaust system according to claim 1, characterized in that, The muffler inlet pipe is provided with a flange, and the valve core is connected through the muffler inlet pipe.
8. The vehicle exhaust system according to claim 7, wherein, The muffler body is provided with a water leakage hole, and the water leakage hole is located at a position of the muffler body close to the ground.
9. The vehicle exhaust system according to claim 7, wherein The vehicle exhaust system further includes a pressure sensor, and the pressure sensor is connected to the vehicle control center; the pressure sensor is installed on the muffler inlet pipe, and when the pressure sensor detects that the air pressure in the muffler inlet pipe exceeds a preset value, the engine is turned off.
10. A vehicle, characterized in that, The vehicle includes the vehicle exhaust system according to any one of claims 1 - 9.