Exhaust system and vehicle

Abstract

The utility model discloses an exhaust system and vehicle relates to vehicle exhaust technical field, include: turbocharger, exhaust duct and pressure storage subassembly, turbocharger includes the compressor and turbine that set up coaxially, and the internal cavity between turbine and compressor is kept apart, exhaust duct communicates the exhaust port of engine and turbocharger, one end of pressure storage subassembly is optional with one side of exhaust duct and communicates and another end passes through the air pipe and communicates turbocharger, and part exhaust gas enters turbocharger through exhaust duct, and part exhaust gas optional enters pressure storage subassembly through exhaust duct and enters turbocharger through pressure storage subassembly and air pipe, the exhaust system of utility model embodiment, waste gas is stored in pressure storage subassembly, and when the urgent acceleration condition, the waste gas of pressure storage subassembly is rapidly injected turbine, and the high -speed impact of waste gas significantly promotes turbine rotor inertia energy, makes turbine accelerated rotation, shortens the pressure -building pressure establishment time of turbocharger.

Description

Technical Field

[0001] This utility model relates to the field of vehicle exhaust technology, and in particular to an exhaust system and a vehicle. Background Technology

[0002] In the field of turbocharged engines, traditional turbocharging systems suffer from turbo lag, which severely restricts engine dynamic response and fuel efficiency. Specifically, when the engine is operating at low speeds, insufficient exhaust flow and energy cause a lag in turbocharger speed increase, resulting in slow build-up of boost pressure. This forces the ECU to increase fuel injection to compensate for the power gap, thereby increasing fuel consumption and worsening unburned hydrocarbon emissions. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an exhaust system in which engine exhaust can be stored in a pressure storage component. During rapid acceleration, the gas in the pressure storage component is rapidly injected into the turbine. The high-speed impact of the stored exhaust gas will significantly increase the rotor inertial energy of the turbine, causing the turbine of the turbocharger to rotate faster, thereby effectively shortening the boost pressure build-up time of the turbocharger.

[0004] An exhaust system according to an embodiment of the present invention includes: a turbocharger, an exhaust pipe, and a pressure storage assembly; the turbocharger includes a compressor and a turbine arranged coaxially, and the internal cavities of the turbine and the compressor are separated from each other; the exhaust pipe connects the exhaust port of the engine and the turbine; the pressure storage assembly is selectively connected to one side of the exhaust pipe, and the pressure storage assembly is also connected to the turbine through an outlet pipe; wherein, a portion of the engine exhaust is adapted to enter the turbine through the exhaust pipe, and a portion of the exhaust selectively enters the pressure storage assembly through the exhaust pipe, and is adapted to enter the turbine through the pressure storage assembly and the outlet pipe.

[0005] According to the exhaust system of this utility model embodiment, by establishing negative pressure in the exhaust pipe and connecting one side of the exhaust pipe to the pressure storage component, the gas in the pressure storage component is rapidly injected into the turbine during rapid acceleration. The high-speed impact of the stored exhaust gas will significantly increase the rotor inertial energy of the turbocharger turbine, causing the turbine to rotate faster, thereby effectively shortening the boost pressure build-up time of the turbocharger.

[0006] According to an embodiment of the present invention, the exhaust system includes a main pipe and multiple branch pipes. One end of each branch pipe is integrated and the other end is connected to a plurality of exhaust ports of the engine. One end of the integrated branch pipes is provided with a common connection end, which is connected to the main pipe so that all branch pipes are connected to the main pipe. One end of the main pipe is connected to the turbine, and the side of the main pipe is connected to the pressure storage assembly.

[0007] According to an embodiment of the present invention, the exhaust system includes a main pipe comprising a detachably connected first pipe section and a second pipe section, the second pipe section being integrated with the turbine, the first pipe section being connected to the common connection end, and the side of the first pipe section being connected to the pressure storage component.

[0008] According to an embodiment of the present invention, the exhaust system of the first pipe section includes a continuously connected constricted section, a throat section, and an expanded section. The common connection end is connected to the constricted section, the side of the throat section is connected to the pressure storage assembly, and the expanded section is connected to the turbine.

[0009] According to the exhaust system of this utility model embodiment, the throat section is connected to the pressure storage component through an exhaust branch, and the inner diameter of the exhaust branch is smaller than the inner diameter of the throat section.

[0010] According to the exhaust system of this utility model embodiment, a first control valve is provided at the exhaust branch.

[0011] According to an embodiment of the present invention, the exhaust system includes a pressure storage assembly comprising a receiving cavity formed by a housing. A sliding member and an elastic member are provided within the receiving cavity. The sliding member divides the receiving cavity into a first cavity and a second cavity, and is adapted to slide in the distribution direction of the first cavity and the second cavity. The first cavity is connected to the main pipe and also to the exhaust pipe. The elastic member is located in the second cavity, with one end connected to the sliding member and the other end connected to the housing. Gas from the main pipe is adapted to enter the first cavity and push the sliding member to move, thereby increasing the volume of the first cavity.

[0012] According to the exhaust system of this utility model embodiment, a second control valve is provided at one end of the exhaust pipe connected to the turbine.

[0013] The exhaust system according to an embodiment of the present invention further includes an after-processor connected to one side of the turbine, and the gas inside the turbine is adapted to be processed by the after-processor.

[0014] This utility model embodiment also discloses a vehicle including the exhaust system described above.

[0015] The advantages of the vehicle compared to existing technologies and the exhaust system compared to existing technologies are the same, and will not be repeated here.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the exhaust system according to an embodiment of the present invention;

[0019] Figure 2 This is a partial structural schematic diagram of the exhaust system according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the pressure storage component according to an embodiment of the present invention;

[0021] Figure 4 This is a structural schematic diagram of the exhaust system of this utility model from another angle.

[0022] Figure label:

[0023] Exhaust system 100, exhaust pipe 1, branch pipe 11, exhaust connection end 111, common connection end 112, main pipe 12, first pipe section 121, necking section 1211, throat section 1212, expanding section 1213, second pipe section 122, turbocharger 2, turbine 21, compressor 22, first connection port 221, second connection port 222, pressure storage assembly 3, receiving cavity 31, first cavity 311, second cavity 312, outer shell 32, sliding member 33, elastic member 34, pressure storage outlet 35, outlet pipe 4, second control valve 41, after-processor 5, third connection port 51, exhaust branch 6, first control valve 61, pressure storage inlet 62. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The following is for reference. Figures 1-4 The exhaust system 100 according to an embodiment of the present invention includes: a turbocharger 2, an exhaust pipe 1, and a pressure storage assembly 3.

[0028] The turbocharger 2 includes a compressor 22 and a turbine 21 arranged coaxially, with the internal cavities of the turbine 21 and the compressor 22 separated from each other; the exhaust pipe 1 connects the exhaust port of the engine and the turbine 21; the pressure accumulator 3 is selectively connected to one side of the exhaust pipe 1, and the pressure accumulator 3 is also connected to the turbine 21 through the exhaust pipe 4; wherein, part of the exhaust from the engine is adapted to enter the turbine 21 through the exhaust pipe 1, and part of the exhaust selectively enters the pressure accumulator 3 through the exhaust pipe 1, and is adapted to enter the turbine 21 through the pressure accumulator 3 and the exhaust pipe 4.

[0029] In practice, the turbocharger 2 includes a compressor 22 and a turbine 21 arranged coaxially. The compressor 22 has a first connection port 221 communicating with the interior of the compressor 22 on one side, and a second connection port 222 communicating with the interior of the compressor 22. The first connection port 221 is used to connect to the inlet of the intercooler, and the outlet of the intercooler is connected to the intake manifold of the engine. Since the gas generates heat when compressed, high-temperature air directly entering the combustion chamber of the engine will cause the engine to overheat, reduce the charging efficiency, and even cause the engine to stall or damage components. The intercooler can reduce the temperature of the air entering the engine and solve the negative impact of high-temperature air on engine performance. The second connection port 222 can be connected to the outlet of the air filter, that is, the air flows to the compressor 22 after being filtered by the air filter, reducing the entry of impurities into the compressor 22, thereby reducing the impact of impurities on the working performance of the compressor 22.

[0030] It should be noted that the internal cavities of the compressor 22 and the turbine 21 are separated from each other. This ensures the efficient conversion of exhaust gas energy into mechanical energy while preventing exhaust gas from mixing with fresh air. It also prevents exhaust gas from entering the engine's intake manifold, which could lead to reduced power, increased fuel consumption, or other safety hazards. Furthermore, the separation between the internal cavities of the compressor 22 and the turbine 21 prevents direct contact or friction between the impellers of the compressor 22 and the turbine 21, ensuring stable operation of the turbine 21 and compressor 22 coaxially and reducing vibration and heat transfer interference during operation.

[0031] Furthermore, one end of the exhaust pipe 1 is connected to the engine's exhaust port, and the other end is connected to the turbine 21, allowing the engine's exhaust gas to flow through the exhaust pipe 1 to the turbine 21. This enables the engine's exhaust gas to drive the rotation of the turbine 21. Since the turbine 21 and compressor 22 are coaxially mounted, when the turbine 21 rotates, it drives the compressor 22 to rotate as well. This allows the compressor 22 to draw more air into the engine. More air participating in combustion increases engine power and torque, making acceleration and overtaking more responsive, and improving power response. The more complete combustion after boosting also improves fuel efficiency. The compressor 22 then delivers this boosted air into the engine cylinders, thus providing the air in the engine cylinders with higher pressure and density, allowing for the combustion of more fuel.

[0032] Furthermore, a pressure storage component 3 is connected to one side of the exhaust pipe 1. Under normal circumstances, a portion of the exhaust gas can directly enter the turbine 21 through the exhaust pipe 1, improving the compression efficiency. A portion of the exhaust gas is stored in the pressure storage component 3 as a backup. When the vehicle is accelerating rapidly, the pressure storage component 3 can be connected to the turbine 21 through the exhaust pipe 4, releasing the exhaust gas in the pressure storage component 3. This reduces the turbo lag problem caused by insufficient flow during rapid acceleration. Reduced lag means that the driver can control the throttle response more precisely. Especially in complex road conditions (such as curves and slopes), the power delivery is more seamless, improving handling safety and significantly improving the smoothness of power response, thus optimizing the driving experience.

[0033] The pressure storage assembly 3 and the exhaust pipe 1 can be selectively connected. During the exhaust stroke of the engine, the exhaust port is open, the intake port is closed, and the piston moves upward from the bottom dead center. The exhaust gas after combustion is discharged by the pressure in the engine cylinder. When the piston approaches the top dead center, the exhaust port closes, ending the exhaust process. That is, when the exhaust port is open, the pressure storage assembly 3 and the exhaust pipe 1 are connected. When the exhaust gas is filled into the pressure storage assembly 3, the pressure storage assembly 3 may include at least a pressure tank for storing exhaust gas. When the amount of gas charged into the pressure storage assembly 3 reaches the maximum amount of exhaust gas that the pressure storage assembly 3 can store, the connection between the exhaust pipe 1 and the pressure storage assembly 3 is blocked, so that the exhaust gas mainly enters the turbine 21 directly through the exhaust pipe 1.

[0034] When a vehicle accelerates rapidly, if the vehicle's controller detects that the throttle opening is ≥85%, it can be defined as a rapid acceleration condition. When the throttle opening is ≥85%, it usually means that the driver has pressed the accelerator pedal deeply, which may cause the engine to be under high load. This driving style may increase fuel consumption. At this time, the high-pressure exhaust gas in the pressure storage component 3 can be introduced into the turbine 21 to purge the turbine blades, thereby increasing the turbine speed of the turbine 21. This can effectively shorten the boost pressure build-up time of the turbocharger 2 and improve the turbine lag problem of the turbocharger 21. Furthermore, the energy of the exhaust gas can be directly converted into mechanical energy to drive the turbine 21 to rotate without consuming additional engine power.

[0035] In some embodiments, the exhaust pipe 1 includes a main pipe 12 and a plurality of branch pipes 11. One end of the plurality of branch pipes 11 is integrated and the other end is respectively connected to a plurality of exhaust ports of the engine. One end of the plurality of branch pipes 11 integrated is provided with a common connection end 112. The common connection end 112 is connected to the main pipe 12 so that the plurality of branch pipes 11 are all connected to the main pipe 12. One end of the main pipe 12 is connected to the turbine 21, and the side of the main pipe 12 is connected to the pressure storage assembly 3.

[0036] Combination Figure 1 and Figure 2As shown, there are three branch pipes 11, all of which are constructed with a curved structure. By constructing the branch pipes 11 with a curved structure, the integration of the branch pipes 11 can be improved while ensuring the length of each branch pipe 11, and the space occupied by the branch pipes 11 can be reduced. The three branch pipes 11 are connected to multiple exhaust ports of the engine respectively. For example, each branch pipe 11 has an exhaust connection end 111 at the end away from the main pipe 12. The exhaust connection end 111 of each branch pipe 11 is connected to one exhaust port of the engine, so that the exhaust gas discharged from multiple exhaust ports of the engine can be discharged to the main pipe 12 simultaneously through the three branch pipes 11, thereby improving exhaust efficiency.

[0037] In addition, the other ends of the three branch pipes 11 are integrated into one unit, forming a common connection end 112. The common connection end 112 is connected to the main pipe 12, which improves the integration of the pipeline, saves space, and facilitates the connection to the turbine 21 through a single main pipe 12. The common connection end 112 and the main pipe 12 can be connected by flanges and bolts. A sealing ring can be installed at the connection between the common connection end 112 and the main pipe 12 to achieve a sealed connection, thereby reducing exhaust gas leakage. In other words, the engine exhaust gas can enter the main pipe 12 through the different branch pipes 11, and then enter the turbine 21 through the main pipe 12 to realize the utilization of exhaust gas and increase the speed of the turbine 21. At the same time, one side of the main pipe 12 is also connected to the pressure storage component 3, which can be used as an exhaust gas storage device. The pressure storage component 3 is connected to the turbine 21 through the exhaust pipe 4. When the turbine 21 needs a higher speed, the exhaust gas in the pressure storage component 3 can flow to the turbine 21 through the exhaust pipe 4.

[0038] Furthermore, the multiple branch pipes 11 and the main pipe 12 are designed to be detachably connected, which facilitates the replacement of the branch pipes 11 when they are damaged or need to be replaced.

[0039] In some embodiments, the main pipeline 12 includes a detachably connected first pipeline segment 121 and a second pipeline segment 122, the second pipeline segment 122 and the turbine 21 are integrated, the first pipeline segment 121 is connected to a common connection end 112, and the side of the first pipeline segment 121 is connected to the pressure storage assembly 3.

[0040] Reference Figure 2As shown, the second pipe section 122 can be integrally formed with the turbine housing 21 and communicate with the interior of the turbine 21. The second pipe section 122 and the first pipe section 121 are detachably connected. For example, the first pipe section 121 and the second pipe section 122 can be detachably connected by flanges and connecting bolts. This makes it easy to replace the first pipe section 121 when it needs to be replaced, and facilitates the assembly of the exhaust pipe 1. When a section of the exhaust pipe 1 is damaged, it is not necessary to replace the entire exhaust pipe 1, saving the cost of the exhaust pipe 1. Furthermore, by making the first pipe section 121 and the second pipe section 122 detachable, different inner diameters can be selected for the first pipe section 121 and the second pipe section 122 according to different situations. It is only necessary to set the same inner diameter at the connection of the first pipe section 121 and the second pipe section 122 to facilitate connection. This allows the pressure difference of the exhaust gas entering the first pipe section 121 from the branch pipe 11 to increase the flow rate of the exhaust gas.

[0041] The side of the first pipe section 121 is connected to the pressure storage component 3. After the exhaust gas flows through multiple branch pipes 11 to the first pipe section 121, it can flow from the first pipe section 121 into the pressure storage component 3 to store the exhaust gas. When more exhaust gas is needed to drive the turbine 21, the exhaust gas in the pressure storage component 3 can be discharged into the turbine 21 again.

[0042] In some embodiments, the first pipe section 121 includes a continuously connected constricted section 1211, a throat section 1212, and a dilated section 1213. A common connection end 112 connects to the constricted section 1211, the side of the throat section 1212 connects to the pressure storage assembly 3, and the dilated section 1213 connects to the turbine 21.

[0043] In this section, the diameter of the constricted section 1211 at the common connection end 112 is larger than the diameter of the end of the constricted section 121 away from the common connection end 112. That is, the diameter of the constricted section 1211 gradually decreases from the end near the common connection end 112 to the end near the first pipe section 121. As a result, when the exhaust gas flows through the common connection end 112 to the constricted section 1211, the exhaust gas can be compressed, thereby increasing the flow velocity of the exhaust gas at the throat section 1212. When the side of the throat section 1212 is connected to the pressure storage component 3, the exhaust gas flow velocity in the throat section 1212 is relatively large, improving the efficiency of the exhaust gas flow to the pressure storage component 3. At the same time, some of the exhaust gas can flow along the expanding section 1213 to the second pipe section 122, and then to the turbine 21, so that the exhaust gas can be rationally applied to the turbine 21, which can meet the different speed requirements of the turbine 21.

[0044] In other words, by reducing the inner diameter of the throat section 1212, the exhaust gas flow rate to the pressure storage component 3 is increased, so that the exhaust gas can quickly enter the pressure storage component 3 through the pressure difference, thereby quickly storing the exhaust gas. When the turbine 21 requires a higher pressure, the pressure storage component 3 can be opened to allow the exhaust gas in the pressure storage component 3 to flow to the turbine 21.

[0045] In other words, the first pipe section 121 is set as a Venturi tube. A Venturi tube is a flow measurement device based on Bernoulli's principle of fluid mechanics. The fluid flow rate is calculated by the pressure difference between the constriction section 1211 and the expansion section 1213. When the fluid flows through the constriction section 1211, the flow velocity increases, resulting in a decrease in pressure (Venturi effect). The flow rate is calculated by measuring the pressure difference between the inlet of the constriction section 1211 and the throat section 1212, so that the flow rate of the exhaust gas is controllable or within the required range.

[0046] In some embodiments, the throat segment 1212 is connected to the pressure storage assembly 3 via the exhaust branch 6, and the inner diameter of the exhaust branch 6 is smaller than the inner diameter of the throat segment 1212.

[0047] In practice, the exhaust branch 6 can be connected to the throat section 1212, and the inner diameter of the exhaust branch 6 is set smaller than the inner diameter of the throat section 1212. The smaller inner diameter means that the flow velocity of the exhaust gas increases from the throat section 1212 to the exhaust branch 6, the pressure decreases, and negative pressure is generated, so that the exhaust gas quickly enters the pressure storage component 3. In addition, the exhaust branch 6 is connected to the middle of the throat section 1212 along the axial direction, so that the exhaust gas in the branch pipe 11 enters the throat section 1212 to increase the flow velocity, and then enters the exhaust branch 6 after the flow velocity is increased. That is, there is a path for the exhaust gas to increase the flow velocity between the connection between the exhaust branch 6 and the throat section 1212 and the common connection end 112. After the exhaust gas flow velocity increases, it continues to increase the flow velocity through the exhaust branch 6, and then enters the pressure storage component 3. This prevents the exhaust gas flow velocity from suddenly increasing significantly. Instead, the flow velocity is gradually increased through the different inner diameters of the throat section 1212 and the exhaust branch 6, thereby improving the flow stability and flow efficiency of the exhaust gas.

[0048] In some embodiments, a first control valve 61 is provided at the exhaust branch 6. The first control valve 61 can be a solenoid valve. For example, the first control valve 61 can be located at the exhaust branch 6 or at the connection between the exhaust branch 6 and the throat section 1212. When exhaust gas enters the pressure storage assembly 3, and the volume of the pressure storage assembly 3 can accommodate more exhaust gas, the first control valve 61 continues to open. When the volume of the pressure storage assembly 3 is at its maximum, the first control valve 61 can be closed, and the exhaust gas is stored in the pressure storage assembly 3. The first control valve 61 is a solenoid valve. The main advantages of a solenoid valve are its small size, reliable operation, convenient maintenance, low price, and ability to automatically control the connection between the throat section 1212 and the pressure storage assembly 3, making control convenient and efficient.

[0049] In some embodiments, the pressure storage assembly 3 includes a receiving cavity 31 formed by the outer shell 32. The receiving cavity 31 is provided with a sliding member 33 and an elastic member 34. The sliding member 33 divides the receiving cavity 31 into a first cavity 311 and a second cavity 312, and the sliding member 33 is adapted to slide in the distribution direction of the first cavity 311 and the second cavity 312. The first cavity 311 is connected to the main pipe 12 and the first cavity 311 is connected to the gas outlet pipe 4. The elastic member 34 is located in the second cavity 312 and one end is connected to the sliding member 33 and the other end is connected to the outer shell 32. The gas in the main pipe 12 is adapted to enter the first cavity 311 and push the sliding member 33 to move to increase the volume in the first cavity 311.

[0050] In practice, the pressure storage assembly 3 includes a housing 32, within which a receiving cavity 31 is formed. The receiving cavity 31 is divided into a first cavity 311 and a second cavity 312 by a sliding member 33. A pressure storage air inlet 62 is provided on one side of the housing 32. The sliding member 33 of the receiving cavity 31 and the pressure storage air inlet 62 are directly opposite each other. Therefore, the exhaust gas entering through the pressure storage air inlet 62 can press against the sliding member 33, causing it to slide along the inner wall of the housing 32 away from the pressure storage air inlet 62. The sliding member 33 can be a sliding plate. An elastic element 34 is provided between the side away from the pressure storage inlet 62 and the outer casing 32. The elastic element 34 is a spring, and one or more springs can be provided. When multiple springs are provided, multiple springs can be spaced apart along the length of the sliding member 33 and connected to the outer casing 32. When the sliding member 33 moves under the pressure of the exhaust gas, it compresses the elastic element 34. The elastic element 34 can improve the smoothness of the sliding plate movement. The spaced arrangement of multiple elastic elements 34 along the length of the sliding member 33 further improves the uniformity of the force on the sliding member 33.

[0051] Meanwhile, by setting the sliding member 33 to slide within the receiving cavity 31, the volume of the first cavity 311 and the second cavity 312 can be changed. That is, when the volume of the first cavity 311 is larger, it can accommodate more exhaust gas. The pressure of the exhaust gas can also be changed by the sliding member 33. For example, when exhaust gas enters the first cavity 311, as exhaust gas continuously enters the first cavity 311, the volume of the first cavity 311 increases. After the elastic member 34 is compressed into place, as exhaust gas continues to enter, the pressure of the exhaust gas increases. In other words, the volume of the first cavity 311 can be changed by controlling the amount of exhaust gas entering the first cavity 311, thereby adjusting the exhaust gas pressure of the first cavity 311 so that the exhaust gas pressure of the first cavity 311 meets the required exhaust gas pressure.

[0052] In some embodiments, a second control valve 41 is provided at one end of the exhaust pipe 4 connected to the turbine 21. In practice, the exhaust pipe 4 can... Figure 1 The rear side of the pressure storage assembly 3 is connected to the turbine 21. The arrangement of the exhaust pipe 4 and the exhaust pipe 1 is staggered, and the throat section 1212 of the exhaust pipe 1 is connected to the pressure storage assembly 3 through the exhaust branch 6. The pressure storage assembly 3 is provided with a pressure storage outlet 35. If the outer shell 32 of the pressure storage assembly 3 in this embodiment of the present invention is designed as a cuboid structure, then the pressure storage inlet 62 and the pressure storage outlet 35 can be respectively arranged on different sides of the cuboid outer shell 32, making it convenient to connect the exhaust pipe 4 and the exhaust pipe 1 to different positions of the turbine 21, and the layout is reasonable. One end of the exhaust pipe 4 is connected to the pressure storage outlet 35, and the other end is connected to the turbine 21. The end of the exhaust pipe 4 connected to the turbine 21 is provided with a second control valve 41, which is also a solenoid valve. The second control valve 41 is used to introduce high-pressure exhaust gas into the turbine 21, thereby increasing the speed of the turbine 21.

[0053] When the ECU monitors the throttle opening as ≥85%, it can be defined as a rapid acceleration condition. Under this condition, the controller controls the opening of the second control valve 41, which introduces the high-pressure exhaust gas in the pressure storage assembly 3 into the turbine 21 to purge the turbine blades, thereby increasing the turbine speed and effectively shortening the pressure build-up time of the turbocharger 2, thus improving the turbo lag problem of the turbocharger 2.

[0054] In some embodiments, the exhaust system 100 further includes an after-treatment unit 5, which is connected to one side of the turbine 21, and the gas inside the turbine 21 is suitable for treatment by the after-treatment unit 5. That is, the exhaust gas located between the compressor 22 and the turbine 21 can be treated by the after-treatment unit 5. The after-treatment unit 5 can further reduce harmful emissions such as nitrogen oxides and particulate matter through mechanisms such as catalytic conversion and adsorption / regeneration. Furthermore, the end of the after-treatment unit 5 away from the turbine 21 is provided with a third connection port 51, which can be used to connect a muffler so that the exhaust gas is treated by the after-treatment unit 5 and then silenced by the muffler to reduce noise.

[0055] This utility model embodiment also proposes a vehicle including the aforementioned exhaust system 100. A negative pressure zone is established in the exhaust passage via a venturi tube, pre-storing a portion of the exhaust gas in a high-pressure gas reservoir. During rapid acceleration, the reservoir valve is opened, rapidly injecting high-pressure exhaust gas into the turbine 21. The high-speed impact of the stored exhaust gas significantly increases the rotor inertial energy of the turbine 21, causing the impeller of the compressor 22 to rotate faster, thereby effectively shortening the pressure build-up time of the turbocharger 2. The main advantage of the short pressure build-up time of the turbocharger 2 is reduced power response lag, resulting in smoother acceleration. When rapid acceleration or overtaking is required, the rapid intervention of the turbocharger 2 provides stronger torque support, reducing the feeling of power interruption caused by turbo lag, making the driving experience closer to that of a naturally aspirated engine, and improving the user experience.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An exhaust system, characterized in that, include: A turbocharger (2) includes a compressor (22) and a turbine (21) arranged coaxially, and the internal cavities of the turbine (21) and the compressor (22) are separated from each other; An exhaust pipe (1) connects the engine exhaust port and the turbine (21); The pressure storage assembly (3) is selectively connected to one side of the exhaust pipe (1) and is also connected to the turbine (21) through the exhaust pipe (4). Part of the engine exhaust is adapted to enter the turbine (21) through the exhaust pipe (1), and part of the exhaust selectively enters the pressure storage assembly (3) through the exhaust pipe (1), and is adapted to enter the turbine (21) through the pressure storage assembly (3) and the exhaust pipe (4).

2. The exhaust system according to claim 1, characterized in that, The exhaust pipe (1) includes a main pipe (12) and multiple branch pipes (11). One end of each branch pipe (11) is integrated and the other end is connected to multiple exhaust ports of the engine. One end of the integrated branch pipe (11) is provided with a common connection end (112). The common connection end (112) is connected to the main pipe (12) so that all branch pipes (11) are connected to the main pipe (12). One end of the main pipe (12) is connected to the turbine (21), and the side of the main pipe (12) is connected to the pressure storage assembly (3).

3. The exhaust system according to claim 2, characterized in that, The main pipeline (12) includes a first pipeline section (121) and a second pipeline section (122) that are detachably connected. The second pipeline section (122) and the turbine (21) are integrated. The first pipeline section (121) is connected to the common connection end (112), and the side of the first pipeline section (121) is connected to the pressure storage assembly (3).

4. The exhaust system according to claim 3, characterized in that, The first pipeline section (121) includes a continuously connected constricted section (1211), a throat section (1212), and a dilated section (1213). The common connection end (112) is connected to the constricted section (1211), the side of the throat section (1212) is connected to the pressure storage assembly (3), and the dilated section (1213) is connected to the turbine (21).

5. The exhaust system according to claim 4, characterized in that, The throat segment (1212) is connected to the pressure storage assembly (3) through an exhaust branch (6), the inner diameter of which is smaller than the inner diameter of the throat segment (1212).

6. The exhaust system according to claim 5, characterized in that, A first control valve (61) is provided at the exhaust branch (6).

7. The exhaust system according to claim 2, characterized in that, The pressure storage assembly (3) includes a receiving cavity (31) formed by a housing (35), and a sliding member (33) and an elastic member (34) are provided in the receiving cavity (31). The sliding member (33) divides the receiving cavity (31) into a first cavity (311) and a second cavity (312), and the sliding member (33) is adapted to slide in the distribution direction of the first cavity (311) and the second cavity (312). The first cavity (311) is connected to the main pipe (12), and the first cavity (311) is connected to the air outlet pipe (4). The elastic element (34) is located in the second cavity (312) and one end is connected to the sliding element (33) and the other end is connected to the outer shell (35). The gas in the main pipe (12) is suitable to enter the first cavity (311) and push the sliding element (33) to move to increase the volume in the first cavity (311).

8. The exhaust system according to claim 1, characterized in that, The exhaust pipe (4) is connected to the turbine (21) at one end with a second control valve (41).

9. The exhaust system according to claim 1, characterized in that, It also includes a post-processor (5) connected to one side of the turbine (21), and the gas inside the turbine (21) is adapted to be processed by the post-processor (5).

10. A vehicle, characterized in that, Includes the exhaust system described in any one of claims 1-9.

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