Muffler, exhaust system, powertrain and vehicle

Abstract

The present invention relates to a muffler, an exhaust system, a power assembly and a vehicle, wherein the muffler comprises a muffler and a connecting pipe, wherein the interior of the muffler forms a muffler chamber; the connecting pipe comprises a muffler pipe section located inside the muffler and a heat dissipation pipe section located outside the muffler, a first muffler hole is arranged on the pipe wall of the muffler pipe section, and the first muffler hole is connected between the inner hole of the muffler pipe section and the muffler chamber; the heat dissipation pipe section can exchange heat with an external cooling medium. The exhaust device provided by the present invention can reduce the content of water vapor in the exhaust gas discharged from the exhaust outlet, and can avoid or reduce the white fog generated at the exhaust gas discharge position in a low temperature environment, thereby enhancing the driving safety of the vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of valves and relates to a muffler, an exhaust system, a power assembly and a vehicle. Background Art

[0002] With the rapid development of the new energy market, the proportion of pure electric and hybrid models in the passenger car market continues to increase. Traditional hybrid models still have engines similar to those of fuel vehicles, and the engine exhaust is guided from the front of the vehicle to the rear of the vehicle through the exhaust system. The exhaust pipe in this traditional exhaust system affects the layout of the power battery and limits the increase in pure electric range.

[0003] In the related art, the exhaust system is arranged in the front cabin of the vehicle.

[0004] However, in the related art, the exhaust tail pipe is arranged in front of the vehicle. In the low temperature environment in winter, the water vapor in the exhaust of the tail pipe will quickly condense and liquefy to form a thicker white mist. The white mist will spread from the bottom of the vehicle to the rear and upper sides of the vehicle with the airflow, blocking the windows on both sides and reducing the driving safety of the vehicle. Summary of the invention

[0005] The technical problem to be solved by the present invention is: with respect to the related technology, the exhaust tail pipe is arranged in front of the vehicle. In the low temperature environment in winter, the water vapor in the exhaust of the tail pipe will quickly condense and liquefy to form a thicker white mist, which reduces the driving safety of the vehicle. A silencer device, an exhaust system, a powertrain and a vehicle are provided.

[0006] In order to solve the above technical problems, on the one hand, the present invention provides a muffler device, comprising a muffler and a connecting pipe, wherein the interior of the muffler forms a muffler chamber;

[0007] The connecting pipe includes a muffler pipe section located inside the muffler and a heat dissipation pipe section located outside the muffler, a first muffler hole is provided on the pipe wall of the muffler pipe section, and the first muffler hole is connected between the inner hole of the muffler pipe section and the muffler chamber;

[0008] The heat dissipation pipe section can exchange heat with an external cooling medium.

[0009] The exhaust device provided by the embodiment of the present invention has a connecting pipe with a silencer pipe section located inside the silencer and a heat dissipation pipe section located outside the silencer. The silencer pipe section is used for silencing the exhaust gas. The heat dissipation pipe section can exchange heat with the external cooling medium, and can condense and precipitate the water vapor in the exhaust gas in the heat dissipation pipe section. The liquid water is brought into the silencer chamber through the airflow and collected at the bottom of the silencer chamber. In this way, the water vapor content in the exhaust gas discharged from the exhaust outlet can be reduced. In a low temperature environment, the white fog generated at the exhaust gas discharge position can be avoided or reduced, thereby enhancing the driving safety of the vehicle.

[0010] Optionally, the heat dissipation pipe section is isolated from the outside.

[0011] Optionally, a fan is further included, and the fan is used to introduce airflow to cool the heat dissipation pipe section.

[0012] Optionally, it further comprises a cover, the cover is arranged outside the heat dissipation pipe section, the cover is provided with an air inlet and an air outlet, and the fan is arranged inside the air inlet;

[0013] The fan is an exhaust fan, and the airflow sucked by the fan enters the housing through the air inlet, and is discharged from the housing through the air outlet after the airflow exchanges heat with the surface of the heat dissipation pipe section.

[0014] Optionally, a plurality of heat dissipation fins are arranged outside the heat dissipation pipe segment, and the plurality of heat dissipation fins are arranged at intervals along the extension direction of the heat dissipation pipe segment.

[0015] Optionally, a liquid storage pot is further included, and a drain port is provided at the bottom of the muffler, the liquid storage pot is installed on the drain port, and the accumulated water at the bottom of the muffler chamber is discharged to the liquid storage pot through the drain port.

[0016] Optionally, a water outlet is provided at the bottom of the liquid storage pot, and a valve is provided on the water outlet. When the valve is opened, the water in the liquid storage pot can be discharged to the ground.

[0017] Optionally, a liquid level sensor is provided in the liquid storage pot, and the valve is a solenoid valve;

[0018] When the liquid level sensor detects that the liquid level in the liquid storage pot exceeds a preset height, the solenoid valve opens.

[0019] Optionally, a plurality of the mufflers and the liquid storage pots are provided, the plurality of the mufflers are interconnected, and each of the liquid storage pots is installed on the drain outlet of the corresponding muffler.

[0020] Optionally, an exhaust gas inlet is provided at the air inlet end of the connecting pipe, and an exhaust gas outlet is provided at the air outlet end of the connecting pipe.

[0021] Optionally, the exhaust gas inlet and the exhaust gas outlet are opened in opposite directions.

[0022] Optionally, the muffler is provided in plurality, the plurality of mufflers include a first muffler and a second muffler arranged at intervals, the muffler pipe section includes a first muffler pipe section located in the first muffler and a second muffler pipe section located in the second muffler, the heat dissipation pipe section is located in the interval between the first muffler and the second muffler, and the heat dissipation pipe section connects the first muffler pipe section and the second muffler pipe section;

[0023] The silencing chamber inside the first muffler is a first silencing chamber, and the silencing chamber inside the second muffler is a second silencing chamber.

[0024] Optionally, a first partition is provided in the first muffler chamber to divide the first muffler chamber into a plurality of first sub-muffler chambers, and a second muffler hole is provided on the first partition chamber that penetrates along the thickness direction thereof, and the second muffler hole is connected to two first sub-muffler chambers on both sides of the first partition chamber in the thickness direction thereof;

[0025] A second partition is provided in the second soundproofing chamber to divide the second soundproofing chamber into a plurality of second sub-soundproofing chambers. A third soundproofing hole is provided on the second partition that passes through the second soundproofing chamber along its thickness direction. The third soundproofing hole is connected to two of the second sub-soundproofing chambers on both sides of the second partition in the thickness direction.

[0026] Optionally, the heat dissipation pipe section includes a first heat dissipation pipe, a second heat dissipation pipe, a third heat dissipation pipe, a fourth heat dissipation pipe and a fifth heat dissipation pipe sequentially arranged along a preset direction, the first sub-muffler chamber includes a first muffler cavity, a second muffler cavity and a third muffler cavity sequentially arranged along the preset direction, and the second sub-muffler chamber includes a fourth muffler cavity, a fifth muffler cavity and a sixth muffler cavity sequentially arranged along the preset direction;

[0027] The first muffler pipe section includes a first pipe section located in the first muffler chamber, a second pipe section and a third pipe section located in the second muffler chamber, and a fourth pipe section located in the third muffler chamber, and the second muffler pipe section includes a fifth pipe section located in the fourth muffler chamber, a sixth pipe section located in the fifth muffler chamber, and a seventh pipe section located in the sixth muffler chamber;

[0028] One end of the first pipe segment is connected to the exhaust gas inlet, the first heat dissipation pipe is connected between the other end of the first pipe segment and one end of the fifth pipe segment, the second heat dissipation pipe is connected between the other end of the fifth pipe segment and one end of the second pipe segment, the third heat dissipation pipe is connected between the other end of the second pipe segment and one end of the sixth pipe segment, the fourth heat dissipation pipe is connected between the other end of the sixth pipe segment and one end of the third pipe segment, the other end of the third pipe segment extends into the second muffler cavity, the fifth heat dissipation pipe is connected between one end of the seventh pipe segment and one end of the fourth pipe segment, the other end of the seventh pipe segment is connected to the exhaust gas outlet, and the other end of the fourth pipe segment extends into the third muffler cavity.

[0029] Optionally, the first pipe segment, the second pipe segment, the third pipe segment, the fourth pipe segment, the fifth pipe segment, the sixth pipe segment and the seventh pipe segment are all provided with the first muffler hole.

[0030] Optionally, a ventilation pipe is provided on the first partition between the first muffler chamber and the second muffler chamber, and the ventilation pipe connects the first muffler chamber and the second muffler chamber.

[0031] On the other hand, an embodiment of the present invention provides an exhaust system, comprising the above-mentioned silencer.

[0032] Optionally, it also includes an exhaust turbine, a compressor and a catalyst, wherein the exhaust turbine is mounted on the cylinder head of the engine, the compressor is connected to the exhaust turbine, the inlet of the exhaust turbine is suitable for connecting to the exhaust pipe of the engine, and the catalyst is connected between the outlet of the exhaust turbine and the exhaust gas inlet.

[0033] On the other hand, an embodiment of the present invention provides a powertrain, including an engine and the above-mentioned exhaust system, wherein the engine and the exhaust system are arranged in a front cabin or a rear cabin of a vehicle.

[0034] On the other hand, an embodiment of the present invention provides a vehicle including the above-mentioned power assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a three-dimensional diagram of a muffler provided in a first embodiment of the present invention;

[0036] Figure 2 is a side view of a muffler provided in a first embodiment of the present invention;

[0037] Figure 3 is a cross-sectional view of a muffler provided by a first embodiment of the present invention;

[0038] Figure 4 It is a cross-sectional view of a muffler provided in a second embodiment of the present invention.

[0039] The reference numerals in the specification are as follows:

[0040] 10. Muffler; 101. Anechoic chamber;

[0041] 1. first muffler; 11. first muffler chamber; 111. first sub-muffler chamber; 111a. sub-muffler chamber; 1111. first muffler cavity; 1112. second muffler cavity; 1113. third muffler cavity; 12. first baffle; 12a. baffle; 13. ventilation pipe;

[0042] 2. Second muffler; 21. Second muffler chamber; 211. Second sub-muffler chamber; 2111. Fourth muffler chamber; 2112. Fifth muffler chamber; 2113. Sixth muffler chamber; 22. Second baffle;

[0043] 3. Connecting pipe; 31. Waste gas inlet; 32. Waste gas outlet; 33. Silencing pipe section; 330. First silencing hole; 331. First silencing pipe section; 3311. First pipe section; 3312. Second pipe section; 3313. Third pipe section; 3314. Fourth pipe section; 332. Second silencing pipe section; 3321. Fifth pipe section; 3322. Sixth pipe section; 3323. Seventh pipe section; 34. Heat dissipation pipe section; 341. First heat dissipation pipe; 342. Second heat dissipation pipe; 343. Third heat dissipation pipe; 344. Fourth heat dissipation pipe; 345. Fifth heat dissipation pipe; 346. First elbow pipe; 347. Second elbow pipe;

[0044] 4. Liquid storage pot;

[0045] 5. Fan;

[0046] 6. housing; 61. air inlet; 611. air inlet grille; 62. air outlet; 621. air outlet grille;

[0047] 7. Heat sink fins. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] First embodiment

[0050] See also Figures 1 to 3 The muffler device provided by one embodiment of the present invention includes a muffler 10 and a connecting pipe 3, wherein the interior of the muffler 10 forms a muffler chamber 101. The connecting pipe 3 includes a muffler pipe section 33 located inside the muffler 10 and a heat dissipation pipe section 34 located outside the muffler 10, and a first muffler hole 330 is provided on the pipe wall of the muffler pipe section 33, and the first muffler hole 330 is connected to the inner hole of the muffler pipe section 33 and the front compartment between the muffler chamber 10. Since the heat dissipation pipe section 34 is located outside the muffler 10, the heat dissipation pipe section 34 can exchange heat with the external cooling medium.

[0051] In the exhaust device provided in the embodiment of the present invention, the connecting pipe 3 has a silencer pipe section 33 located inside the silencer 10 and a heat dissipation pipe section 34 located outside the silencer 10. The silencer pipe section 33 is used for silencing the exhaust gas, and the heat dissipation pipe section 34 can exchange heat with the external cooling medium, and can condense and precipitate water vapor in the exhaust gas in the heat dissipation pipe section 34. Liquid water is brought into the silencer chamber 101 through the airflow and collected at the bottom of the silencer chamber 101. In this way, the water vapor content in the exhausted exhaust gas can be reduced, and in a low temperature environment, the white fog generated at the exhaust gas exhaust position can be avoided or reduced, thereby enhancing the driving safety of the vehicle.

[0052] The heat dissipation pipe section 34 is isolated from the outside, that is, the heat dissipation pipe section 34 cannot leak, thereby preventing the exhaust gas from being discharged in an omnidirectional manner and affecting other components in the front cabin of the vehicle.

[0053] It also includes a liquid storage pot 4. The bottom of the muffler 10 is provided with a drain port, and the liquid storage pot 4 is installed on the drain port. The accumulated water at the bottom of the muffler chamber 101 is discharged to the liquid storage pot 4 through the drain port.

[0054] The air inlet end of the connecting pipe 3 is provided with an exhaust gas inlet 31, and the air outlet end of the connecting pipe 3 is provided with an exhaust gas outlet 32. Exhaust gas enters from the exhaust gas inlet 31, enters the muffler chamber 101 through the first muffler hole 330 on the pipe wall of the muffler pipe section 33, and is discharged from the exhaust gas outlet 32 ​​after muffler noise reduction in the muffler chamber 101.

[0055] Since the temperature of the waste gas is high, usually at 300-400 degrees Celsius, the waste gas is preferably discharged from the waste gas outlet 32, and the drain port is not directly open. The liquid storage pot 4 is used to store the accumulated water to prevent the waste gas from being discharged arbitrarily from the drain port.

[0056] The bottom of the liquid storage pot 4 is provided with a water outlet, and the water outlet is provided with a valve, and when the valve is opened, the water in the liquid storage pot 4 can be discharged to the ground. That is, the drainage of the liquid storage pot 4 is controlled by the valve.

[0057] The liquid storage pot 4 is provided with a liquid level sensor, and the valve is a solenoid valve; when the liquid level sensor detects that the liquid level in the liquid storage pot 4 exceeds a preset height, the solenoid valve opens. The solenoid valve and the liquid level sensor are electrically connected to a controller, and the controller controls the opening or closing of the solenoid valve according to the liquid level information of the liquid level sensor. When the liquid level does not exceed the preset height, the solenoid valve is closed and no water is drained. When the liquid level exceeds the preset height, the solenoid valve opens to drain water to avoid excessive accumulation of water.

[0058] See also Figure 3 The exhaust gas inlet 31 is an independent pipe, which is fixedly connected to the muffler pipe section 33. However, in other embodiments, the exhaust gas inlet 31 and the muffler pipe section 33 may be formed in one piece, or the exhaust gas inlet 31 and the muffler 10 may be formed in one piece.

[0059] See also Figure 3 The exhaust outlet 32 ​​is an independent pipe, which is fixedly connected to the muffler pipe section 33. However, in other embodiments, the exhaust outlet 32 ​​and the muffler pipe section 33 may be formed integrally, or the exhaust outlet 32 ​​and the muffler 10 may be formed integrally.

[0060] See also Figure 2, further comprising a fan 5, the fan 5 being used to introduce airflow to cool the heat dissipation pipe section 34. That is, in this embodiment, the external cooling medium is air.

[0061] However, in other embodiments, the cooling medium may also be a medium such as a cooling liquid.

[0062] See also Figure 1 and Figure 2 , further comprising a cover 6, the cover 6 being arranged outside the heat dissipation pipe section 34, the cover 6 being provided with an air inlet 61 and an air outlet 62, and the fan 5 being arranged inside the air inlet 61. The cover 6 covers the heat dissipation pipe section 34 to prevent the heat dissipated by the heat dissipation pipe section 34 from being randomly diffused. In this way, most of the heat dissipated by the heat dissipation pipe section 34 is discharged from the air outlet 62.

[0063] The fan 5 is an exhaust fan. The airflow sucked by the fan 5 enters the housing 6 through the air inlet 61. After the airflow exchanges heat with the surface of the heat dissipation pipe section 34, the airflow is discharged from the housing 6 through the air outlet 62. An air inlet grille 611 is provided at the air inlet 61 to prevent dust. An air outlet grille 621 is provided at the air outlet 62 to prevent dust.

[0064] When the vehicle is running at high speed, the air flow at the bottom of the vehicle is strong, and the cooling effect is better when the air flow passes through the heat dissipation pipe section 34. However, when the vehicle is stopped at idle speed or low speed, the gas flow near the heat dissipation pipe section 34 is slow, and the cooling effect is poor. Therefore, a fan 5 is installed on the inner side of the air inlet 61 on the front side of the cover 6, and the external cold air is introduced by the active drainage of the fan 5 to perform convection heat exchange with the heat dissipation pipe section 34. When the vehicle is running at a low speed or in an idle condition, the fan 5 is turned on to draw the cold air outside the cover 6 into the inside of the cover 6. When passing through the heat dissipation pipe section 34, the heat dissipation pipe section 34 is fully cooled, and then discharged through the air outlet 62 on the rear side, so as to realize the active control of the flow intensity of the cold air near the heat dissipation pipe section 34 and improve the cooling effect. In this way, the gas flow intensity at the bottom of the vehicle can be enhanced, the air flow disturbance can be enhanced, the white mist can be quickly diffused, and the driving safety of the vehicle can be enhanced.

[0065] See also Figure 3 A plurality of heat dissipation fins 7 are disposed outside the heat dissipation pipe section 34, and the plurality of heat dissipation fins 7 are arranged at intervals along the extension direction of the heat dissipation pipe section 34. The heat dissipation fins 7 can increase the heat exchange area of ​​the heat dissipation pipe section 34 and improve the heat dissipation efficiency.

[0066] See also Figure 3 The exhaust gas inlet 31 and the exhaust gas outlet 32 ​​are opened in opposite directions. In this way, the exhaust gas can be fully silenced in the silencing chamber 101 as much as possible, and the silencing effect is good.

[0067] In this embodiment, two mufflers 10 and liquid storage pots 4 are provided, the two mufflers 10 are connected to each other, the exhaust gas inlet 31 is provided on one of the mufflers 10, and the exhaust gas outlet 32 ​​is provided on the other muffler 10. Each liquid storage pot 4 is installed on the drain outlet of the corresponding muffler 10.

[0068] Specifically, see Figures 1 to 3 The two mufflers 10 are a first muffler 1 and a second muffler 2 arranged at an interval, the muffler pipe section 33 includes a first muffler pipe section 331 located in the first muffler 1 and a second muffler pipe section 332 located in the second muffler 2, the heat dissipation pipe section 34 is located in the interval between the first muffler 1 and the second muffler 2, and the heat dissipation pipe section 34 connects the first muffler pipe section 331 and the second muffler pipe section 332.

[0069] The muffler chamber 101 inside the first muffler 1 is the first muffler chamber 11 , and the muffler chamber inside the second muffler 2 is the second muffler chamber 21 . The first muffler chamber 11 is provided with the drain port at the bottom, and the second muffler chamber 21 is provided with the drain port at the bottom.

[0070] See also Figure 1 and Figure 2 The cover 6 is fixed between the first muffler 1 and the second muffler 2 .

[0071] See also Figure 3 A first partition plate 12 is provided in the first muffler chamber 11 to divide the first muffler chamber 11 into a plurality of first sub-muffler chambers 111, and a second muffler hole is provided on the first partition plate 12 which passes through along its thickness direction, and the second muffler hole is connected to the two first sub-muffler chambers 111 on both sides of the thickness direction of the first partition plate 12 where the second muffler hole is located; a second partition plate 22 is provided in the second muffler chamber 21 to divide the second muffler chamber 21 into a plurality of second sub-muffler chambers 211, and a third muffler hole is provided on the second partition plate 22 which passes through along its thickness direction, and the third muffler hole is connected to the two second sub-muffler chambers 211 on both sides of the thickness direction of the second partition plate 22 where the third muffler hole is located.

[0072] See also Figure 3 The heat dissipation pipe section 34 includes a first heat dissipation pipe 341, a second heat dissipation pipe 342, a third heat dissipation pipe 343, a fourth heat dissipation pipe 344 and a fifth heat dissipation pipe 345 which are sequentially arranged along a preset direction; the first sub-muffler chamber 111 includes a first muffler cavity 1111, a second muffler cavity 1112 and a third muffler cavity 1113 which are sequentially arranged along the preset direction; the second sub-muffler chamber 211 includes a fourth muffler cavity 2111, a fifth muffler cavity 2112 and a sixth muffler cavity 2113 which are sequentially arranged along the preset direction.

[0073] The first silencer pipe section 331 includes a first pipe section 3311 located in the first silencer chamber 1111, a second pipe section 3312 and a third pipe section 3313 located in the second silencer chamber 1112, and a fourth pipe section 3314 located in the third silencer chamber 1113; the second silencer pipe section 332 includes a fifth pipe section 3321 located in the fourth silencer chamber 2111, a sixth pipe section 3322 located in the fifth silencer chamber 2112, and a seventh pipe section 3323 located in the sixth silencer chamber 2113.

[0074] One end of the first pipe segment 3311 is connected to the exhaust gas inlet 31, the first heat dissipation pipe 341 is connected between the other end of the first pipe segment 3311 and one end of the fifth pipe segment 3321, the second heat dissipation pipe 342 is connected between the other end of the fifth pipe segment 3321 and one end of the second pipe segment 3312, the third heat dissipation pipe 343 is connected between the other end of the second pipe segment 3312 and one end of the sixth pipe segment 3322, the fourth heat dissipation pipe 344 is connected between the other end of the sixth pipe segment 3322 and one end of the third pipe segment 3313, the other end of the third pipe segment 3313 extends into the second muffler chamber 1112, the fifth heat dissipation pipe 345 is connected between one end of the seventh pipe segment 3323 and one end of the fourth pipe segment 3314, the other end of the seventh pipe segment 3323 is connected to the exhaust gas outlet 32, and the other end of the fourth pipe segment 3314 extends into the third muffler chamber 1113.

[0075] The first pipe section 3311, the second pipe section 3312, the third pipe section 3313, the fourth pipe section 3314, the fifth pipe section 3321, the sixth pipe section 3322 and the seventh pipe section 3323 are all provided with the first muffler holes 330 to enhance the muffler capability.

[0076] A ventilation pipe 13 is provided on the first partition plate 12 between the first muffler chamber 1111 and the second muffler chamber 1112, and the ventilation pipe 13 connects the first muffler chamber 1111 and the second muffler chamber 1113, so that a part of the exhaust gas can quickly enter the second muffler chamber 1113 from the first muffler chamber 1111.

[0077] Figure 3 In the embodiment, the third pipe section 3313 is located in the second muffler cavity 1112, and the fourth pipe section 3314 is located in the third muffler cavity 1113. The third pipe section 3313 and the fourth pipe section 3314 are arranged at intervals and are not directly connected. However, in other embodiments, the third pipe section 3313 and the fourth pipe section 3314 can also be connected through a connecting pipe, and the first muffler hole 330 can be provided on the connecting pipe to further enhance the muffler effect.

[0078] In addition, the connecting pipe 3 can be formed by connecting multiple independent pipes, or can be a continuous whole pipe.

[0079] See also Figure 3 , the exhaust gas enters the first pipe section 3311 from the exhaust gas inlet 31, and then a part of the exhaust gas enters the first muffler chamber 1111 through the first muffler hole 330 on the first pipe section 3311, and the exhaust gas in the first muffler chamber 1111 enters the second muffler chamber 1112 through the ventilation pipe 13 and the second muffler hole on the first partition plate 12, and another part of the exhaust gas in the first pipe section 3311 flows into the fifth pipe section 3321 through the first heat dissipation pipe 341, and a part of the exhaust gas in the fifth pipe section 3321 flows into the fourth muffler chamber 21 through the first muffler hole 330 thereon 11, and the other part flows into the second pipe section 3312 through the second heat dissipation pipe 342; a part of the exhaust gas in the second pipe section 3312 flows into the second muffler chamber 1112 through the first muffler hole 330 thereon, and the other part flows into the sixth pipe section 3322 through the third heat dissipation pipe 343; a part of the exhaust gas in the sixth pipe section 3322 flows into the fifth muffler chamber 2112 through the first muffler hole 330 thereon, and the other part flows into the third pipe section 3313 through the fourth heat dissipation pipe 344; the exhaust gas in the third pipe section 3313 flows into the second muffler chamber 1112. The exhaust gas in the second muffler chamber 1112 flows into the second muffler chamber 1112 through the second muffler hole on the first partition plate 12, and the exhaust gas in the second muffler chamber 1112 flows into the seventh pipe section 3323 through the fifth heat dissipation pipe 345. A small amount of the exhaust gas in the seventh pipe section 3323 flows into the sixth muffler chamber 2113 through the first muffler hole 330 thereon, and most of it is discharged through the exhaust gas outlet 32.

[0080] The heat dissipation pipe section 34 comprises a plurality of heat dissipation pipes spaced apart from each other, so that the cooling effect is good. In addition, the connecting pipe 3 is repeatedly circuitous between the two mufflers, so that the sound elimination and noise reduction effect is good.

[0081] Second embodiment

[0082] See also Figure 4 The exhaust device provided in the second embodiment of the present invention includes a muffler 10, a connecting pipe 3 and a liquid storage pot ( Figure 4 ), the interior of the muffler 10 forms a muffler chamber 101. The connecting pipe 3 includes a muffler pipe section 33 located inside the muffler 10 and a heat dissipation pipe section 34 located outside the muffler 10, and a first muffler hole 330 is provided on the pipe wall of the muffler pipe section 33, and the first muffler hole 330 is connected between the inner hole of the muffler pipe section 33 and the muffler chamber 10. Since the heat dissipation pipe section 34 is located outside the muffler 10, the heat dissipation pipe section 34 can exchange heat with the external cooling medium.

[0083] The heat dissipation pipe section 34 is isolated from the outside, that is, the heat dissipation pipe section 34 cannot leak, thereby preventing the exhaust gas from being discharged in an omnidirectional manner and affecting other components in the front cabin of the vehicle.

[0084] It also includes a liquid storage pot. The bottom of the muffler 10 is provided with a drain port, and the liquid storage pot is installed on the drain port. The accumulated water at the bottom of the muffler chamber 101 is discharged to the liquid storage pot through the drain port.

[0085] The air inlet end of the connecting pipe 3 is provided with an exhaust gas inlet 31, and the air outlet end of the connecting pipe 3 is provided with an exhaust gas outlet 32. Exhaust gas enters from the exhaust gas inlet 31, enters the muffler chamber 101 through the first muffler hole 330 on the pipe wall of the muffler pipe section 33, and is discharged from the exhaust gas outlet 32 ​​after muffler noise reduction in the muffler chamber 101.

[0086] Since the temperature of the waste gas is high, usually at 300-400 degrees Celsius, the waste gas is preferably discharged from the waste gas outlet 32, and the drain port is not directly open. The accumulated water is stored in a liquid storage pot to prevent the waste gas from being discharged from the drain port at will.

[0087] The bottom of the liquid storage pot is provided with a water outlet, and the water outlet is provided with a valve, and when the valve is opened, the water in the liquid storage pot can be discharged to the ground. That is, the drainage of the liquid storage pot is controlled by the valve.

[0088] The liquid storage pot is provided with a liquid level sensor, and the valve is a solenoid valve; when the liquid level sensor detects that the liquid level in the liquid storage pot exceeds a preset height, the solenoid valve opens. The solenoid valve and the liquid level sensor are electrically connected to a controller, and the controller controls the opening or closing of the solenoid valve according to the liquid level information of the liquid level sensor. When the liquid level does not exceed the preset height, the solenoid valve is closed and no water is drained. When the liquid level exceeds the preset height, the solenoid valve opens to drain water to avoid excessive accumulation of water.

[0089] See also Figure 4 The exhaust gas inlet 31 is an independent pipe, which is fixedly connected to the muffler pipe section 33. However, in other embodiments, the exhaust gas inlet 31 and the muffler pipe section 33 may be formed in one piece, or the exhaust gas inlet 31 and the muffler 10 may be formed in one piece.

[0090] See also Figure 4 The exhaust outlet 32 ​​is an independent pipe, which is spaced apart from the muffler pipe section 33. However, in other embodiments, the exhaust outlet 32 ​​and the muffler pipe section 33 may be fixed or integrally formed, or the exhaust outlet 32 ​​and the muffler 10 may be integrally formed.

[0091] In this embodiment, a fan may also be included, and the fan is used to introduce airflow to cool the heat dissipation pipe section 34. That is, in this embodiment, the external cooling medium is air.

[0092] In this embodiment, a cover may be further included, the cover is arranged outside the heat dissipation pipe section 34, the cover is provided with an air inlet and an air outlet, and the fan is arranged inside the air inlet. The cover covers the heat dissipation pipe section 34 to prevent the heat dissipated by the heat dissipation pipe section 34 from being randomly diffused. In this way, most of the heat dissipated by the heat dissipation pipe section 34 is discharged from the air outlet.

[0093] The fan is an exhaust fan. The airflow sucked by the fan enters the housing through the air inlet, and is discharged from the housing through the air outlet after the airflow exchanges heat with the surface of the heat dissipation pipe section 34. An air inlet grille is provided at the air inlet to prevent dust. An air outlet grille is provided at the air outlet to prevent dust.

[0094] When the vehicle is running at high speed, the air flow at the bottom of the vehicle is strong, and the cooling effect is better when the airflow passes through the heat dissipation pipe section 34. However, when the vehicle is stopped at idle speed or low speed, the gas flow near the heat dissipation pipe section 34 is slow, and the cooling effect is poor. Therefore, a fan is installed on the inner side of the air inlet on the front side of the cover, and the external cold air is introduced by the fan's active drainage method to perform convection heat exchange with the heat dissipation pipe section 34. When the vehicle is running at a low speed or in an idle condition, the fan is turned on to draw the cold air outside the cover into the inside of the cover. When passing through the heat dissipation pipe section 34, the heat dissipation pipe section 34 is fully cooled, and then discharged through the air outlet on the rear side, so as to realize the active control of the flow intensity of the cold air near the heat dissipation pipe section 34 and improve the cooling effect. In this way, the gas flow intensity at the bottom of the vehicle can be enhanced, the airflow disturbance can be enhanced, the white mist can be quickly diffused, and the driving safety of the vehicle can be enhanced.

[0095] See also Figure 4 A plurality of heat dissipation fins 7 are disposed outside the heat dissipation pipe section 34, and the plurality of heat dissipation fins 7 are arranged at intervals along the extension direction of the heat dissipation pipe section 34. The heat dissipation fins 7 can increase the heat exchange area of ​​the heat dissipation pipe section 34 and improve the heat dissipation efficiency.

[0096] See also Figure 4 The exhaust gas inlet 31 and the exhaust gas outlet 32 ​​are opened in opposite directions. In this way, the exhaust gas can be fully silenced in the silencing chamber 101 as much as possible, and the silencing effect is good.

[0097] In this embodiment, the muffler 10 and the liquid storage pot are provided with one, and the exhaust gas inlet 31 and the exhaust gas outlet 32 ​​are both provided on the muffler 10 .

[0098] See also Figure 4 The muffler pipe section 33 is located inside the muffler 1 , and the heat dissipation pipe section 34 is located outside the muffler 10 . The heat dissipation pipe section 34 is connected to the muffler pipe section 33 .

[0099] The bottom of the anechoic chamber 101 is provided with a drain port.

[0100] The cover is fixed to the outside of the muffler 10 .

[0101] See also Figure 4 A partition 12a is provided in the silencing chamber 101 to divide the silencing chamber 101 into a plurality of sub-silencing chambers 111a. The partition 12a is provided with a second silencing hole that penetrates along its thickness direction. The second silencing hole is connected to the two sub-silencing chambers 111a on both sides of the partition 12a in the thickness direction.

[0102] See also Figure 4 The heat dissipation pipe section 34 includes a first heat dissipation pipe 341, a second heat dissipation pipe 342, a third heat dissipation pipe 343 and a fourth heat dissipation pipe 344 which are sequentially arranged along a preset direction, and the sub-muffler chamber 111a includes a first muffler cavity 1111, a second muffler cavity 1112 and a third muffler cavity 1113 which are sequentially arranged along the preset direction. An end of the first heat dissipation pipe 341 away from the muffler 10 is connected to an end of the second heat dissipation pipe 342 away from the muffler 10 through a first elbow 346, and an end of the third heat dissipation pipe 343 away from the muffler 10 is connected to an end of the fourth heat dissipation pipe 344 away from the muffler 10 through a second elbow 347. The first elbow 346 and the second elbow 347 are U-shaped.

[0103] The muffler pipe section 33 includes a first pipe section 3311 located in the first muffler cavity 1111 , a second pipe section 3312 located in the second muffler cavity 1112 , and a third pipe section 3313 .

[0104] One end of the first pipe segment 3311 is connected to the exhaust gas inlet 31, the first heat dissipation pipe 341 is connected between the other end of the first pipe segment 3311 and one end of the second heat dissipation pipe 342, the other end of the second heat dissipation pipe 342 is connected to one end of the second pipe segment 3312, the third heat dissipation pipe 343 is connected between the other end of the second pipe segment 3312 and one end of the fourth heat dissipation pipe 344, the other end of the fourth heat dissipation pipe 344 is connected to one end of the third pipe segment 3313, and the other end of the third pipe segment 3313 extends into the second muffler chamber 1112.

[0105] The first pipe section 3311, the second pipe section 3312, and the third pipe section 3313 are all provided with the first muffler holes 330 to enhance the muffler capability.

[0106] A ventilation pipe 13 is provided on the partition plate 12a between the first muffler chamber 1111 and the second muffler chamber 1112, and the ventilation pipe 13 connects the first muffler chamber 1111 and the second muffler chamber 1112, so that a part of the exhaust gas can quickly enter the second muffler chamber 1112 from the first muffler chamber 1111.

[0107] See also Figure 4 The exhaust gas enters the first pipe section 3311 through the exhaust gas inlet 31, and then a part of the exhaust gas enters the first muffler chamber 1111 through the first muffler hole 330 on the first pipe section 3311. The exhaust gas in the first muffler chamber 1111 enters the second muffler chamber 1112 through the second muffler hole on the ventilation pipe 13 and the partition plate 12a. Another part of the exhaust gas in the first pipe section 3311 flows into the second pipe section 3312 through the first heat dissipation pipe 341 and the second heat dissipation pipe 342. A part of the exhaust gas in the second pipe section 3312 Part of the exhaust gas flows into the second silencer chamber 1112 through the first silencer hole 330 thereon, and the other part flows into the third pipe section 3313 through the third heat dissipation tube 343 and the fourth heat dissipation tube 344; the exhaust gas in the third pipe section 3313 flows into the second silencer chamber 1112 through the first silencer hole 330 thereon and the end opening, the exhaust gas in the second silencer chamber 1112 flows into the third silencer chamber 1113 through the second silencer hole on the partition 12a, and the exhaust gas in the third silencer chamber 1113 is discharged through the exhaust gas outlet 32.

[0108] The heat dissipation pipe section 34 includes a plurality of heat dissipation pipes spaced apart from each other, and has a good cooling effect.

[0109] Figure 4 In the embodiment, the exhaust outlet 32 ​​is spaced apart from the third pipe section 3313. However, in other embodiments, the exhaust outlet 32 ​​and the third pipe section 3313 may be connected via a connecting pipe, and the first muffler hole 330 may be provided on the connecting pipe to further enhance the muffler effect.

[0110] In addition, the connecting pipe 3 can be formed by connecting multiple independent pipes, or can be a continuous whole pipe.

[0111] Compared with the first embodiment, only one muffler 10 is provided, so the cost is lower and the arrangement is more flexible.

[0112] In this embodiment, the exhaust gas inlet 31 and the exhaust gas outlet 32 ​​are located at opposite sides of the muffler 10 .

[0113] Third embodiment

[0114] The exhaust device provided in the third embodiment of the present invention is different from the first embodiment in that the fan is eliminated, so that the cost is lower.

[0115] Fourth embodiment

[0116] The exhaust device provided in the fourth embodiment of the present invention is different from the second embodiment in that the fan is eliminated, thus reducing the cost.

[0117] Fifth embodiment

[0118] The exhaust device provided in the fifth embodiment of the present invention is different from the first embodiment in that three mufflers are provided. For example, a third muffler can be connected between the first muffler and the second muffler. In this case, the muffler pipe section includes a first muffler pipe section located in the first muffler, a second muffler pipe section located in the second muffler, and a third muffler pipe section located in the third muffler. The heat dissipation pipe section includes a first heat dissipation pipe section located in the interval between the first muffler and the third muffler and a second heat dissipation pipe section located in the interval between the second muffler and the third muffler. The first heat dissipation pipe section connects the first muffler pipe section and the third muffler pipe section, and the second heat dissipation pipe section connects the second muffler pipe section and the third muffler pipe section.

[0119] The third muffler is provided in this embodiment to further enhance the muffler effect.

[0120] Sixth embodiment

[0121] The exhaust device provided in the sixth embodiment of the present invention is different from the first embodiment in that the liquid storage pot is eliminated and the accumulated water at the bottom of the muffler chamber is discharged through the drain outlet.

[0122] Seventh embodiment

[0123] The exhaust device provided in the seventh embodiment of the present invention is different from the sixth embodiment in that the liquid storage pot and the drainage port at the bottom of the muffler chamber are eliminated, and the accumulated water at the bottom of the muffler chamber is pumped out of the muffler by other means.

[0124] On the other hand, an embodiment of the present invention provides an exhaust system, comprising the muffler device of the above embodiment.

[0125] Corresponding to a turbocharged vehicle, the exhaust system also includes an exhaust turbine, a compressor and a catalyst. The exhaust turbine is installed on the cylinder head of the engine, the compressor is connected to the exhaust turbine, the inlet of the exhaust turbine is suitable for connecting to the exhaust pipe of the engine, and the catalyst is connected between the outlet of the exhaust turbine and the exhaust gas inlet.

[0126] However, in other embodiments, for naturally aspirated vehicles, the exhaust gas inlet 11 is directly connected to the exhaust pipe of the engine.

[0127] In addition, an embodiment of the present invention provides a powertrain, including an engine and the exhaust system of the above embodiment, wherein the engine and the exhaust system are arranged in a front cabin of a vehicle.

[0128] In addition, an embodiment of the present invention provides a powertrain, including an engine and the exhaust system of the above embodiment, wherein the engine and the exhaust system are arranged in a rear compartment of a vehicle.

[0129] In addition, an embodiment of the present invention provides a vehicle, comprising the powertrain of the above embodiment.

[0130] The powertrain of the embodiment of the present invention has all the advantages of the above-mentioned muffler. The vehicle may be a new energy vehicle, such as a plug-in hybrid vehicle or an extended-range vehicle.

[0131] However, in other embodiments, for naturally aspirated vehicles, the exhaust gas inlet 11 is directly connected to the exhaust pipe of the engine.

[0132] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A muffler, characterized in that: It includes a muffler and a connecting pipe, wherein the interior of the muffler forms a muffler chamber; The connecting pipe includes a muffler pipe section located inside the muffler and a heat dissipation pipe section located outside the muffler, a first muffler hole is provided on the pipe wall of the muffler pipe section, and the first muffler hole is connected between the inner hole of the muffler pipe section and the muffler chamber; The heat dissipation pipe section can exchange heat with an external cooling medium; The muffler is arranged in the front cabin of the vehicle; The muffler is provided in plurality, the plurality of mufflers include a first muffler and a second muffler arranged at intervals, the muffler pipe section includes a first muffler pipe section located in the first muffler and a second muffler pipe section located in the second muffler, the heat dissipation pipe section is located in the interval between the first muffler and the second muffler, and the heat dissipation pipe section connects the first muffler pipe section and the second muffler pipe section; the muffler chamber inside the first muffler is the first muffler chamber, and the muffler chamber inside the second muffler is the second muffler chamber; The heat dissipation pipe section includes a plurality of heat dissipation pipes spaced apart from each other, so that the connecting pipe repeatedly meanders between the two mufflers.

2. The muffler device according to claim 1, characterized in that: The heat dissipation pipe section is isolated from the outside world.

3. The muffler device according to claim 1, characterized in that: A fan is also included, and the fan is used to introduce airflow to cool the heat dissipation pipe section.

4. The muffler device according to claim 3, characterized in that: It also includes a cover shell, which is arranged outside the heat dissipation pipe section, and the cover shell is provided with an air inlet and an air outlet, and the fan is arranged inside the air inlet; The fan is an exhaust fan, and the airflow sucked by the fan enters the housing through the air inlet, and is discharged from the housing through the air outlet after the airflow exchanges heat with the surface of the heat dissipation pipe section.

5. The muffler device according to claim 1, characterized in that: A plurality of heat dissipation fins are arranged outside the heat dissipation pipe section, and the plurality of heat dissipation fins are arranged at intervals along the extension direction of the heat dissipation pipe section.

6. The muffler device according to claim 1, characterized in that: It also includes a liquid storage pot. The bottom of the muffler is provided with a drain port. The liquid storage pot is installed on the drain port. The accumulated water at the bottom of the muffler chamber is discharged to the liquid storage pot through the drain port.

7. The muffler device according to claim 6, characterized in that: A water outlet is arranged at the bottom of the liquid storage pot, and a valve is arranged on the water outlet. When the valve is opened, the water in the liquid storage pot can be discharged to the ground.

8. The muffler device according to claim 7, characterized in that: A liquid level sensor is arranged in the liquid storage pot, and the valve is a solenoid valve; When the liquid level sensor detects that the liquid level in the liquid storage pot exceeds a preset height, the solenoid valve opens.

9. The muffler device according to claim 6, characterized in that: There are multiple silencers and liquid storage pots, and the multiple silencers are interconnected. Each liquid storage pot is installed on the drain outlet of the corresponding silencer.

10. The muffler device according to any one of claims 1 to 9, characterized in that: The air inlet end of the connecting pipe is provided with an exhaust gas inlet, and the air outlet end of the connecting pipe is provided with an exhaust gas outlet.

11. The muffler device according to claim 10, characterized in that: The exhaust gas inlet and the exhaust gas outlet are opened in opposite directions.

12. The muffler device according to claim 10, characterized in that: A first partition is provided in the first muffler chamber to divide the first muffler chamber into a plurality of first sub-muffler chambers, and a second muffler hole is provided on the first partition chamber that penetrates along the thickness direction thereof, and the second muffler hole is connected to two first sub-muffler chambers on both sides of the first partition chamber in the thickness direction thereof; A second partition is provided in the second soundproofing chamber to divide the second soundproofing chamber into a plurality of second sub-soundproofing chambers. A third soundproofing hole is provided on the second partition that passes through the second soundproofing chamber along its thickness direction. The third soundproofing hole is connected to two of the second sub-soundproofing chambers on both sides of the second partition in the thickness direction.

13. The muffler device according to claim 12, characterized in that: The heat dissipation pipe section includes a first heat dissipation pipe, a second heat dissipation pipe, a third heat dissipation pipe, a fourth heat dissipation pipe and a fifth heat dissipation pipe which are sequentially arranged along a preset direction; the first sub-muffler chamber includes a first muffler cavity, a second muffler cavity and a third muffler cavity which are sequentially arranged along the preset direction; the second sub-muffler chamber includes a fourth muffler cavity, a fifth muffler cavity and a sixth muffler cavity which are sequentially arranged along the preset direction; The first muffler pipe section includes a first pipe section located in the first muffler chamber, a second pipe section and a third pipe section located in the second muffler chamber, and a fourth pipe section located in the third muffler chamber, and the second muffler pipe section includes a fifth pipe section located in the fourth muffler chamber, a sixth pipe section located in the fifth muffler chamber, and a seventh pipe section located in the sixth muffler chamber; One end of the first pipe segment is connected to the exhaust gas inlet, the first heat dissipation pipe is connected between the other end of the first pipe segment and one end of the fifth pipe segment, the second heat dissipation pipe is connected between the other end of the fifth pipe segment and one end of the second pipe segment, the third heat dissipation pipe is connected between the other end of the second pipe segment and one end of the sixth pipe segment, the fourth heat dissipation pipe is connected between the other end of the sixth pipe segment and one end of the third pipe segment, the other end of the third pipe segment extends into the second muffler cavity, the fifth heat dissipation pipe is connected between one end of the seventh pipe segment and one end of the fourth pipe segment, the other end of the seventh pipe segment is connected to the exhaust gas outlet, and the other end of the fourth pipe segment extends into the third muffler cavity.

14. The muffler device according to claim 13, characterized in that: The first pipe section, the second pipe section, the third pipe section, the fourth pipe section, the fifth pipe section, the sixth pipe section and the seventh pipe section are all provided with the first muffler holes.

15. The muffler device according to claim 13, characterized in that: A ventilation pipe is provided on the first partition plate between the first muffler chamber and the second muffler chamber, and the ventilation pipe connects the first muffler chamber and the second muffler chamber.

16. An exhaust system, characterized in that: A silencer comprising the silencer described in any one of claims 10 to 15.

17. The exhaust system according to claim 16, characterized in that It also includes an exhaust turbine, a compressor and a catalyst. The exhaust turbine is installed on the cylinder head of the engine, the compressor is connected to the exhaust turbine, the inlet of the exhaust turbine is suitable for connecting to the exhaust pipe of the engine, and the catalyst is connected between the outlet of the exhaust turbine and the exhaust gas inlet.

18. A powertrain, characterized in that: The invention comprises an engine and the exhaust system according to claim 16 or 17, wherein the engine and the exhaust system are arranged in a front cabin of a vehicle.

19. A vehicle, characterized in that: Includes the powertrain as described in claim 18.

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