CN118622434A - Muffler, exhaust cooling system and vehicle - Google Patents

Abstract

The present invention relates to the field of vehicle exhaust technology, and in particular to a muffler, an exhaust cooling system and a vehicle. A muffler has at least one chamber inside, and is provided with an exhaust gas inlet, an exhaust gas outlet and a cold air inlet. The exhaust gas inlet is suitable for connecting to the exhaust pipe of the engine; the cold air inlet is suitable for connecting to a cold air supplier, and the exhaust gas outlet is used to discharge the mixed exhaust gas and cold air in the muffler. The cold air and the exhaust gas are mixed in the chamber of the fixed muffler, which is conducive to ensuring the cooling effect on the exhaust gas, reducing the temperature at the exhaust outlet, and diluting the white mist phenomenon at the exhaust outlet when the temperature is low.

Description

Muffler, exhaust cooling system and vehicle

Technical Field

The invention belongs to the technical field of vehicle exhaust gas cooling, and in particular relates to a muffler, an exhaust gas cooling system and a vehicle.

Background Art

As the engine works, the exhaust gas is a high-temperature, pressurized gas. Although the temperature of the gas decreases after passing through the entire exhaust system, the air flow temperature at the exhaust outlet is still very high, resulting in the formation of white mist at the exhaust outlet when the ambient temperature is low.

In the related art, the exhaust system is provided with an exhaust gas cooling device, but the exhaust gas cooling effect of the exhaust gas cooling device is relatively poor.

Summary of the invention

The technical problem to be solved by the present invention is: to provide a muffler, an exhaust gas cooling system and a vehicle in view of the problem that the existing exhaust gas cooling device has a poor cooling effect on the exhaust gas.

In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a muffler, which has at least one chamber, and is provided with an exhaust gas inlet, an exhaust gas outlet and a cold air inlet. The exhaust gas inlet is suitable for connecting to the exhaust pipe of the engine; the cold air inlet is suitable for connecting to a cold air supplier, and the exhaust gas outlet is for discharging the mixed exhaust gas and cold air in the muffler.

Optionally, the muffler further comprises a communication structure, wherein a partition is provided in the inner cavity of the muffler, and the partition divides the inner cavity of the muffler into two chambers, wherein the two chambers comprise a first chamber and a second chamber;

The exhaust gas inlet is connected to the first cavity, the cold air inlet and the exhaust gas outlet are connected to the second cavity, and the connecting structure is connected to the first cavity and the second cavity.

Optionally, the connecting structure includes a connecting pipe, the connecting pipe is installed on the partition, one end of the connecting pipe extends into the first cavity, and the other end of the connecting pipe extends into the second cavity.

Optionally, in the opening direction of the exhaust gas inlet, the partition is arranged transversely on one side of the exhaust gas inlet, and the first cavity and the second cavity are distributed linearly along the opening direction of the exhaust gas inlet.

Optionally, a water leakage hole is provided on the bottom side of the muffler for discharging liquid water formed by liquefaction of the cold air and the exhaust gas after mixing.

On the other hand, an embodiment of the present invention provides an exhaust gas cooling system, comprising a cold air supplier and the above-mentioned muffler, wherein the cold air supplier is used to supply cold air to the muffler.

Optionally, the cold air supplier includes an air filter, which is provided with a filtered air inlet and a filtered air outlet. The air filter is used to filter the outside air sucked from the filtered air inlet and discharge it from the filtered air outlet, and the filtered air outlet is connected to the cold air inlet.

Optionally, the cold air supplier also includes an air pump, which is provided with a pump inlet and a pump outlet. The pump inlet is connected to the filtered air outlet through a pipeline, and the pump outlet is connected to the cold air inlet through a pipeline. The air pump is used to pump the air filtered by the air filter to the muffler.

Optionally, the air pump is suitable for sharing the air filter with the vehicle's engine, and an engine air inlet is provided on a pipeline connecting the air filter to the pump inlet or on the air filter. The engine air inlet is suitable for being connected to the vehicle's engine through a pipeline so as to pass air filtered by the air filter into the vehicle's engine.

Optionally, the exhaust system further includes an exhaust tail pipe connected to the exhaust gas outlet.

Optionally, the exhaust tail pipe is in a continuously curved shape.

Optionally, the exhaust tail pipe is coiled multiple times on a preset plane to form a disc shape.

Optionally, a heat dissipation structure is provided on a surface of the exhaust tail pipe on one side facing away from the vehicle chassis.

Optionally, the heat dissipation structure is a fin, and an angle between the fin and the flow direction of the exhaust gas in the exhaust tail pipe is an obtuse angle.

On the other hand, an embodiment of the present invention provides a vehicle, comprising the above-mentioned exhaust gas cooling system.

In the exhaust gas cooling system of the present invention, cold air is introduced into the chamber of the muffler through the cold air inlet to mix and cool with the exhaust gas in a fixed chamber in the muffler, so that the cold air flow can effectively and stably mix and contact with the exhaust gas flow before being discharged from the exhaust gas outlet, which is conducive to ensuring the cooling effect of the exhaust gas, effectively reducing the temperature of the exhaust gas flow before discharge, and diluting the white fog phenomenon of the exhaust outlet when the temperature is low. Moreover, the exhaust gas cooling system has a high degree of integration.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the arrangement of an exhaust gas cooling system provided by an embodiment of the present invention;

FIG2 is a schematic diagram of the internal structure of FIG1 ;

FIG3 is a schematic structural diagram of the air filter in FIG1 ;

FIG4 is a schematic diagram of the structure of the air pump in FIG1 ;

FIG5 is a schematic diagram of the structure of the exhaust tail pipe in FIG1 ;

FIG. 6 is a front view of FIG. 5 .

The reference numerals in the specification are as follows:

1. Muffler; 11. First chamber; 12. Second chamber; 13. Partition; 14. Exhaust gas inlet; 15. Exhaust gas outlet; 16. Cold air inlet; 17. Water leakage hole; 18. Connecting pipe; 2. Exhaust tail pipe; 21. Heat dissipation structure; 3. Air filter; 31. Filter air inlet; 32. Filter air outlet; 4. Air pump; 41. Pump inlet; 42. Pump outlet; 5. Exhaust pipe.

DETAILED DESCRIPTION

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 intended to limit the present invention.

Since the exhaust gas during the operation of the engine is high-temperature gas, the specific temperature is related to the engine displacement and whether it is turbocharged. When the engine displacement is 1.5L or above and it is running at full power, the exhaust temperature at the outlet of the exhaust pipe 5 of the engine is basically greater than 700°C. After the exhaust system dissipates heat, the air flow temperature at the exhaust outlet is still very high. Since the exhaust gas flow contains water vapor, the outdoor ambient temperature is low in winter in the north, and the exhaust gas containing high-temperature water vapor will produce white mist (water vapor pre-cooling liquefaction) when it is discharged from the exhaust port. The exhaust cooling system provided by the present invention can reduce the concentration of white mist at the exhaust outlet.

As shown in Figures 1 and 2, an embodiment of the present invention provides an exhaust cooling system, including a cold air supplier and a muffler 1, wherein the muffler 1 has at least one chamber, and the muffler 1 is provided with an exhaust gas inlet 14, an exhaust gas outlet 15 and a cold air inlet 16, wherein the exhaust gas inlet 14 is suitable for connecting to the exhaust pipe 5 of the engine.

The cold air supplier is connected to the cold air inlet 16 for supplying cold air into the muffler 1. The exhaust gas outlet 15 is for exhausting the mixed exhaust gas and cold air in the muffler 1.

It should be noted that the "cold air" mentioned above refers to gas whose temperature is lower than that of exhaust gas.

Specifically, the engine will emit exhaust gas after burning fuel during operation. The exhaust gas generated by the engine enters the corresponding chamber in the muffler 1 through the exhaust gas inlet 14. At the same time, the cold air supplier supplies cold air to the corresponding chamber in the muffler 1 through the cold air inlet 16. The cold air and the exhaust gas are fully mixed in the muffler, so that the cold air cools down the exhaust gas. The mixed exhaust gas and cold air are discharged from the exhaust gas outlet 15.

The cold air supplier discharges the cold air into the muffler 1 to mix with the exhaust gas, so that the exhaust cooling system has a high degree of integration, and also enables the exhaust gas flow and the cold air flow to flow into the chamber of the fixed muffler 1, and the cold air flow can effectively and stably mix and contact with the exhaust gas flow, which is beneficial to ensure the cooling effect of the exhaust gas, effectively reduce the temperature of the exhaust gas flow before discharge, and dilute the white mist phenomenon at the exhaust outlet when the temperature is low.

Moreover, the setting of the cold air supplier can ensure the stability of the cold air flow rate entering the muffler 1, so that a sufficient amount of cold air is mixed with the exhaust gas in the fixed chamber of the muffler 1, which is beneficial to ensure the cooling effect of the exhaust gas, reduce the temperature at the exhaust outlet, and reduce the white mist phenomenon at the exhaust outlet when the temperature is low.

The exhaust cooling system of the present invention can be applied to various fuel vehicles such as gasoline and diesel, and has a wide range of vehicle models. Considering the integration of the exhaust system, the exhaust cooling system can be applied to the layout scheme where the exhaust is integrated in the front cabin or the rear cabin of the vehicle, and can also be applied to the exhaust non-integrated layout scheme.

In the exhaust gas cooling system of the present invention, the cold air supplier discharges the cold air into the muffler 1 to mix with the exhaust gas. The exhaust gas cooling system has a high degree of integration, and the exhaust gas flow and the cold air flow flow into the fixed muffler 1. The cold air flow can effectively and stably mix and contact with the exhaust gas flow, which is conducive to ensuring the cooling effect on the exhaust gas, effectively reducing the temperature of the exhaust gas flow before discharge, and diluting the white mist phenomenon at the exhaust outlet when the temperature is low. At the same time, regardless of the flow rate and flow rate of the exhaust gas, the cold air supplier can ensure that the flow rate of the cold air flow entering the muffler 1 is stable, so that a sufficient amount of cold air is mixed with the exhaust gas in the fixed muffler 1, which is conducive to ensuring the cooling effect on the exhaust gas, reducing the temperature at the exhaust outlet, and diluting the white mist phenomenon at the exhaust outlet when the temperature is low.

In one embodiment, as shown in Figure 2, the muffler 1 also includes a connecting structure. A partition 13 is provided in the inner cavity of the muffler 1. The partition 13 divides the inner cavity of the muffler 1 into two chambers. The two chambers include a first chamber 11 and a second chamber 12. The exhaust gas inlet 14 is connected to the first chamber 11, and the cold air inlet 16 and the exhaust gas outlet 15 are connected to the second chamber 12. The connecting structure is provided on the partition 13.

The exhaust gas enters the first chamber 11 through the exhaust gas inlet 14, and then enters the second chamber 12 through the connecting structure. At the same time, the cold air supplier supplies cold air to the second chamber 12 through the cold air inlet 16. The cold air and the exhaust gas generated by the engine are fully mixed in the second chamber 12, so that the exhaust gas is silenced in the first chamber 11 and then discharged into the second chamber 12 for cooling.

The inner cavity of the muffler 1 is divided into a first cavity 11 and a second cavity 12 by a partition plate 13, and the structure is simple.

In one embodiment, as shown in FIG. 2 , the communication structure includes a communication pipe 18 , which is sealed and installed on the partition 13 , with one end of the communication pipe 18 extending into the first cavity 11 and the other end extending into the second cavity 12 .

It should be noted that the diameter of the connecting pipe 18 is related to the exhaust gas displacement of the engine.

In one embodiment, in the opening direction of the exhaust gas inlet 14, the partition 13 is arranged transversely on one side of the exhaust gas inlet 14, and the first chamber 11 and the second chamber 12 are distributed linearly along the opening direction of the exhaust gas inlet 14. The exhaust gas flows into the first chamber 11 along the opening direction of the exhaust gas inlet 14, and the partition 13 is located on one side of the opening direction of the exhaust gas inlet 14. Therefore, the connecting structure is opposite to the flow direction of the exhaust gas, which is conducive to the exhaust gas flowing into the second chamber 12 through the connecting structure, and is conducive to increasing the exhaust gas discharge speed.

In one embodiment, the second chamber 12 is located below the first chamber 11, the exhaust gas inlet 14 is provided on the top wall of the muffler 1, and the partition 13 is arranged in the horizontal direction.

In one embodiment, as shown in FIG2 , a water leakage hole 17 is provided on the bottom side of the muffler 1 for discharging liquid water formed by mixing the cold air and the exhaust gas. Since white mist (pre-cooling and liquefaction of high-temperature water vapor) is generated during the mixing process of the high-temperature exhaust gas flow and the cold air flow, a water leakage hole 17 is provided on the bottom side of the muffler 1 to discharge the generated liquid water from the second chamber 12 in a timely manner.

In one embodiment, the water leakage hole 17 is disposed at the lowest point of the second chamber 12 .

In one embodiment, as shown in Figures 1 to 3, the cold air supplier includes an air filter 3, on which a filter air inlet 31 and a filter air outlet 32 are provided. The air filter 3 is used to filter the air sucked from the filter air inlet 31 and discharge it from the filter air outlet 32, and the filter air outlet 32 is connected to the cold air inlet 16.

The air filter 3 can filter the outside air. Since the air contains a high amount of impurities, the air filter 3 can prevent the impurities from being sucked into the muffler 1, causing the volume of the corresponding chamber of the muffler 1 to decrease or clogging the water leakage hole 17. Moreover, the air filter 3 uses the outside air as the air source, which is sufficient and stable, and has a low cost.

In one embodiment, as shown in Figures 1 and 4, the cold air supplier also includes an air pump 4, which is provided with a pump inlet 41 and a pump outlet 42. The pump inlet 41 is connected to the filtered air outlet 32 through a pipeline, and the pump outlet 42 is connected to the cold air inlet 16 through a pipeline. The air pump 4 is used to supply the air filtered by the air filter 3 into the muffler 1.

External air is sucked into the air filter 3 through the filter air inlet 31, filtered by the air filter 3, introduced into the air pump 4 through the pipeline from the filter air outlet 32, and then pumped into the muffler 1 by the air pump 4 to mix with the exhaust gas.

The provision of the air pump 4 can increase the flow velocity of the cold air flow and increase the cold air flow rate from the cold air supplier to the muffler 1. Moreover, the outside air is first filtered through the air filter 3 and then pumped into the muffler 1 by the air pump 4, which can prevent impurities in the air from being sucked into the air pump 4 and causing damage to the air pump 4.

It should be noted that the performance of the air pump 4 needs to be designed and matched according to the actual demand for cooling air, and the air pump 4 can be arranged at any position of the vehicle, and the arrangement position is relatively flexible.

In one embodiment, the air pump 4 is an air compressor.

In other embodiments, the air pump 4 may be an air conditioner.

In one embodiment, the air pump 4 is suitable for sharing the air filter 3 with the engine of the vehicle. An engine air inlet is provided on the pipeline connecting the air filter 3 with the pump inlet 41 or on the air filter 3. The engine air inlet is suitable for connecting to the engine of the vehicle through a pipeline to pass air filtered by the air filter 3 into the engine of the vehicle.

Since the engine needs to be fed with outside air to ensure the combustion of fuel when it is working, in order to prevent impurities in the outside air from damaging the engine, an air filter needs to be installed on the vehicle, and the outside air is filtered by the air filter before being fed into the engine. Therefore, in the present invention, the exhaust cooling system and the engine share an air filter 3, which can not only filter air for the vehicle engine, but also filter air for the air pump 4. Therefore, the performance of the air filter 3 needs to meet the common flow requirements of the cold air required by the engine and the muffler 1 at the same time.

In other embodiments, the muffler 1 may be connected to an air filter 3 alone, and the air filter 3 only needs to ensure the cold air flow required for cooling the exhaust gas in the muffler 1 .

In one embodiment, as shown in FIG5 , the exhaust gas cooling system further includes an exhaust tail pipe 2, which is connected to the exhaust gas outlet 15. The exhaust gas is cooled in the muffler 1 and then discharged to the exhaust tail pipe 2, which can reduce the exhaust gas flow temperature in advance and effectively reduce the white mist phenomenon formed at the exhaust outlet of the exhaust tail pipe 2.

In one embodiment, the exhaust tail pipe 2 is continuously curved and has a longer length, so that the exhaust gas discharged from the exhaust outlet 15 of the muffler 1 can release heat in the exhaust tail pipe 2, further reducing the exhaust temperature at the exhaust outlet.

In one embodiment, the exhaust tail pipe 2 is coiled multiple times on a preset plane to form a disc shape. Specifically, the exhaust tail is coiled below the muffler 1 in a surrounding manner, and the length of the exhaust tail pipe 2 can be designed according to the actual space of the vehicle.

In one embodiment, a heat dissipation structure 21 is provided on the surface of the exhaust tail pipe 2 on one side facing away from the vehicle chassis. The heat dissipation structure 21 can increase the heat exchange area between the exhaust tail pipe 2 and the air flow. During the driving process of the vehicle, the air flow takes away the heat of the heat dissipation structure 21, and then takes away the heat of the exhaust gas flow in the exhaust tail pipe 2, so as to further reduce the exhaust temperature at the exhaust outlet and further dilute the white mist phenomenon formed at the exhaust outlet.

In one embodiment, as shown in FIG6 , the heat dissipation structure 21 is a fin, and the angle between the fin and the flow direction of the exhaust gas in the exhaust tail pipe 2 is an obtuse angle. The vehicle usually discharges the exhaust gas toward the rear of the vehicle, that is, the exhaust gas in the exhaust tail pipe 2 flows from the front to the rear. When the angle between the heat dissipation structure 21 and the flow direction of the exhaust gas in the exhaust tail pipe 2 is an obtuse angle, the air flow can better take away the heat of the heat dissipation structure 21 during the driving process of the vehicle.

In other embodiments, the muffler 1 may have only one chamber, and the exhaust gas inlet 14, the exhaust gas outlet 15 and the cold air inlet 16 are all connected to the chamber, and the exhaust gas generated by the engine and the cold air supplied by the cold air supplier pass into the chamber and are mixed and cooled in the chamber.

In other embodiments, a plurality of partitions 13 may be provided, and the plurality of partitions 13 divide the inner cavity of the muffler 1 into a plurality of chambers, one of which may be the first chamber 11 , and the remaining chambers may be the second chamber 12 .

In other embodiments, the heat dissipation structure 21 may be a heat dissipation plate.

In other embodiments, the exhaust tail pipe 2 may be a continuously curved pipe.

In other embodiments, the connecting pipe 18 may be disposed outside the muffler 1 .

In other embodiments, the connecting structure may include a connecting hole. To prevent the cold gas in the second chamber 12 from flowing into the first chamber 11 , a one-way valve may be installed in the connecting hole. The one-way valve only allows the exhaust gas in the first chamber 11 to flow into the second chamber 12 .

In other embodiments, the exhaust gas outlet 15 may be disposed at the bottom side of the second chamber 12 , and the liquid water may be discharged through the exhaust gas outlet 15 .

In addition, an embodiment of the present invention provides a muffler, the structure of which is the same as the structure of the muffler in any of the above embodiments, and will not be repeated here.

In addition, an embodiment of the present invention provides a vehicle, comprising the exhaust gas cooling system of the above embodiment.

The above description is only a preferred embodiment of the present invention and is 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 (15)

1. A muffler, characterized in that the muffler (1) has at least one chamber therein, and the muffler (1) is provided with an exhaust gas inlet (14), an exhaust gas outlet (15) and a cold air inlet (16), wherein the exhaust gas inlet (14) is suitable for connecting to an exhaust pipe (5) of an engine; the cold air inlet (16) is suitable for connecting to a cold air supplier, and the exhaust gas outlet (15) is used to discharge the mixed exhaust gas and cold air in the muffler (1). 2. The muffler according to claim 1, characterized in that the muffler further comprises a communication structure, a partition (13) is arranged in the inner cavity of the muffler (1), and the partition (13) divides the inner cavity of the muffler (1) into two chambers, and the two chambers include a first chamber (11) and a second chamber (12); The exhaust gas inlet (14) is connected to the first chamber (11), the cold air inlet (16) and the exhaust gas outlet (15) are connected to the second chamber (12), and the connecting structure is connected to the first chamber (11) and the second chamber (12). 3. The muffler according to claim 2, characterized in that the connecting structure comprises a connecting pipe (18), the connecting pipe (18) is installed on the partition (13), one end of the connecting pipe (18) extends into the first cavity (11), and the other end extends into the second cavity (12). 4. The muffler according to claim 2, characterized in that in the opening direction of the exhaust gas inlet (14), the partition (13) is arranged laterally on one side of the exhaust gas inlet (14), and the first chamber (11) and the second chamber (12) are distributed in a straight line along the opening direction of the exhaust gas inlet (14). 5. The muffler according to claim 1, characterized in that a water leakage hole (17) is provided on the bottom side of the muffler (1) for discharging liquid water formed by liquefaction of the cold air and the exhaust gas after mixing. 6. An exhaust gas cooling system, characterized in that it comprises a cold air supplier and the muffler according to any one of claims 1 to 5, wherein the cold air supplier is used to supply cold air to the muffler (1). 7. The exhaust gas cooling system according to claim 6, characterized in that the cold air supplier comprises an air filter (3), the air filter (3) is provided with a filter air inlet (31) and a filter air outlet (32), the air filter (3) is used to filter the air sucked from the filter air inlet (31) and discharge it from the filter air outlet (32), and the filter air outlet (32) is connected to the cold air inlet (16). 8. The exhaust gas cooling system according to claim 7, characterized in that the cold air supplier further comprises an air pump (4), the air pump (4) being provided with a pump inlet (41) and a pump outlet (42), the pump inlet (41) being connected to the filtered air outlet (32) via a pipeline, the pump outlet (42) being connected to the cold air inlet (16) via a pipeline, and the air pump (4) being used to pump the air filtered by the air filter (3) into the muffler (1). 9. The exhaust gas cooling system according to claim 8, characterized in that the air pump (4) is suitable for sharing the air filter (3) with the engine of the vehicle, and an engine air inlet is provided on the pipeline connecting the air filter (3) and the pump inlet (41) or on the air filter (3), and the engine air inlet is suitable for connecting to the engine of the vehicle through a pipeline so as to pass the air filtered by the air filter (3) into the engine of the vehicle. 10. The exhaust gas cooling system according to claim 6, characterized in that the exhaust gas cooling system further comprises an exhaust tail pipe (2), and the exhaust tail pipe (2) is connected to the exhaust gas outlet (15). 11. The exhaust gas cooling system according to claim 10, characterized in that the exhaust tail pipe (2) is in a continuously curved shape. 12. The exhaust gas cooling system according to claim 11, characterized in that the exhaust tail pipe (2) is coiled multiple times on a preset plane to form a disc shape. 13. The exhaust gas cooling system according to claim 10, characterized in that a heat dissipation structure (21) is provided on a surface of the exhaust tail pipe (2) facing away from the vehicle chassis. 14. The exhaust gas cooling system according to claim 13, characterized in that the heat dissipation structure (21) is a fin, and the angle between the fin and the flow direction of the exhaust gas in the exhaust tail pipe (2) is an obtuse angle. 15. A vehicle, characterized by comprising the exhaust gas cooling system according to any one of claims 6 to 14.