Exhaust system

Abstract

The utility model provides an exhaust system which comprises a middle pipe and a tail silencer. One end of the middle pipe is used for being connected with an upstream exhaust device, and the other end of the middle pipe is connected with a tail silencer. At least one lifting hook is arranged on the middle pipe; the tail silencer comprises a shell, a left end plate, a first partition plate, a second partition plate, a third partition plate, a fourth partition plate, a right end plate, an air inlet pipe, an air inlet support, an air inlet tuning pipe, a passive valve integrated pipe, a left air outlet pipe and a right air outlet pipe. The two ends of the shell are connected with a left end plate and a right end plate respectively, a first partition plate, a second partition plate, a third partition plate and a fourth partition plate are arranged in the shell at intervals, and the space in the shell is sequentially divided into a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity in the direction from the left end plate to the right end plate. The noise problem of an exhaust system can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of exhaust systems of vehicle, especially a kind of exhaust system suitable for hybrid car. BACKGROUND

[0002] With the continuous improvement of the noise and vibration performance requirements of whole vehicle, as an important part of vehicle, the vibration and noise control of exhaust system gets more and more attention. And hybrid car is affected by battery pack and other chassis components, the layout space of intermediate pipeline is limited, and the layout of muffler in hybrid car may affect the surrounding equipment, resulting in that the surrounding equipment cannot work normally or is damaged due to high temperature.

[0003] Therefore, canceling the muffler gradually becomes the preferred structure of hybrid car chassis layout; and the exhaust system arranged with tail muffler may bring high-frequency airflow noise and low-frequency noise problems if the structure is not properly designed, especially after canceling the muffler and using intermediate pipe, the problem of low-frequency standing wave noise in the intermediate pipe. SUMMARY

[0004] To solve at least one technical problem in the prior art, the utility model embodiment provides an exhaust system, which can effectively solve the noise problem of the exhaust system. To achieve the above technical purpose, the utility model embodiment adopts the technical scheme that

[0005] The utility model embodiment provides an exhaust system, which comprises an intermediate pipe and a tail muffler.

[0006] One end of the intermediate pipe is used for connecting an upstream exhaust device, and the other end of the intermediate pipe is connected with the tail muffler; at least one hook is arranged on the intermediate pipe.

[0007] The tail muffler comprises a shell, a left end plate, a first partition plate, a second partition plate, a third partition plate, a fourth partition plate, a right end plate, an inlet pipe, an inlet support, an inlet tuning pipe, a passive valve integrated pipe, a left outlet pipe and a right outlet pipe.

[0008] The two ends of the shell are connected with the left end plate and the right end plate respectively, and the first partition plate, the second partition plate, the third partition plate and the fourth partition plate are arranged in the shell in intervals, so as to divide the space in the shell into a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber from the left end plate to the right end plate direction in sequence.

[0009] The outer end of the inlet pipe is connected with the other end of the intermediate pipe through the shell; the inlet pipe is carried on the inlet support, and the inlet support is located in the third chamber and connected with the second partition plate and the third partition plate respectively.

[0010] The intake tuning pipe comprises a connected elbow section and a straight section, the port of the intake tuning pipe elbow section is arranged opposite to the inner end of the intake pipe with a distance, the straight section of the intake tuning pipe passes through the fourth partition plate, the fourth chamber and the fourth partition plate into the fifth chamber, and the intake tuning pipe is provided with a sound absorbing hole on the section in the fourth chamber;

[0011] The valve end and the pipe end of the passive valve integrated pipe are fixed on the second partition plate and the first partition plate respectively, and the passive valve integrated pipe passes through the second partition plate, the second chamber and the first partition plate into the first chamber from the third chamber;

[0012] The left air outlet pipe comprises a first straight section, an elbow section and a second straight section, the first straight section of the left air outlet pipe passes through the first partition plate, the second chamber and the second partition plate from the first chamber, is connected with one end of the left air outlet pipe elbow section arranged in the third chamber, the other end of the left air outlet pipe elbow section is connected with the second straight section of the left air outlet pipe, the second straight section of the left air outlet pipe passes through the second partition plate, the second chamber, the first partition plate, the first chamber and the left end plate and is connected with the left tail pipe, and the left air outlet pipe is provided with a sound absorbing hole on the section in the second chamber;

[0013] The right air outlet pipe comprises a straight section and a connecting section, the straight section of the right air outlet pipe passes through the first partition plate, the second chamber and the second partition plate from the first chamber, is connected with the connecting section of the right air outlet pipe, the connecting section of the right air outlet pipe passes through the third partition plate, the fourth chamber, the fourth partition plate, the fifth chamber and the right end plate from the third chamber and is connected with the right tail pipe, and the right air outlet pipe is provided with a sound absorbing hole on the section in the second chamber.

[0014] Further, the second chamber is provided with sound absorbing cotton.

[0015] Further, the fourth chamber is provided with sound absorbing cotton.

[0016] Further, the tail muffler further comprises a first support and a second support, the first support connects the first partition plate and the second partition plate, and the second support connects the third partition plate and the fourth partition plate.

[0017] Further, the left tail pipe and the right tail pipe are respectively connected with hooks.

[0018] Further, the intermediate pipe is connected with a load block.

[0019] The beneficial effects brought by the technical scheme provided by the utility model embodiment are that the utility model can effectively absorb high-frequency airflow noise of exhaust and suppress low-frequency noise, the last section of the intake tuning pipe entering the fifth chamber can suppress low-frequency standing wave noise caused by the intermediate pipe, and the load block makes the inherent frequency of the exhaust system deviate from the fixed frequency of the vehicle body. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1The exhaust system structure schematic diagram in the embodiment of the utility model.

[0021] Figure 2 The tail muffler internal structure schematic diagram in the embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following will be further described in detail in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0023] In the description of the embodiment of the utility model, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The device or element indicated or implied must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiment of the utility model, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements, it can be wireless connection, or it can be wired connection. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0026] As Figure 1 and Figure 2 The utility model embodiment provides an exhaust system, which comprises an intermediate pipe 1 and a tail muffler 2.

[0027] One end of the intermediate pipe 1 is used for connecting the upstream exhaust device, and the other end of the intermediate pipe 1 is connected with the tail muffler 2; at least one hook 3 is arranged on the intermediate pipe 1, and the hook 3 is used for hanging the lug 4 arranged on the vehicle body;

[0028] The tail muffler 2 comprises a shell 201, a left end plate 202, a first partition plate 203, a second partition plate 204, a third partition plate 205, a fourth partition plate 206, a right end plate 207, an air inlet pipe 208, an air inlet support 209, an air inlet tuning pipe 210, a passive valve integrated pipe 211, a left air outlet pipe 212, and a right air outlet pipe 213.

[0029] The two ends of the shell 201 are connected with the left end plate 202 and the right end plate 207 respectively, and the first partition plate 203, the second partition plate 204, the third partition plate 205, and the fourth partition plate 206 are arranged in the shell 201 in intervals, thereby dividing the space in the shell 201 into the first chamber 214, the second chamber 215, the third chamber 216, the fourth chamber 217, and the fifth chamber 218 from the left end plate 202 to the right end plate 207.

[0030] The outer end of the air inlet pipe 208 is connected with the other end of the intermediate pipe 1 through the shell 201, and the air inlet pipe 208 is carried on the air inlet support 209 which is arranged in the third chamber 216 and connected with the second partition plate 204 and the third partition plate 205 respectively.

[0031] The air inlet tuning pipe 210 comprises a bend pipe section and a straight pipe section which are connected with each other, and the port of the bend pipe section of the air inlet tuning pipe 210 is arranged opposite to the inner end of the air inlet pipe 208 with a distance therebetween; the straight pipe section of the air inlet tuning pipe 210 passes through the fourth partition plate 206, the fourth chamber 217, and the fourth partition plate 206 from the third chamber 216 into the fifth chamber 218; and the air inlet tuning pipe 210 is provided with a sound absorbing hole on the pipe section in the fourth chamber 217.

[0032] The valve end and the pipe end of the passive valve integrated pipe 211 are fixed on the second partition plate 204 and the first partition plate 203 respectively, and the passive valve integrated pipe 211 passes through the second partition plate 204, the second chamber 215, and the first partition plate 203 from the third chamber 216 into the first chamber 214.

[0033] The left air outlet pipe 212 comprises a first straight pipe section, a bend pipe section, and a second straight pipe section; the first straight pipe section of the left air outlet pipe 212 passes through the first partition plate 203, the second chamber 215, and the second partition plate 204 from the first chamber 214, and is connected with one end of the bend pipe section of the left air outlet pipe 212 arranged in the third chamber 216; the other end of the bend pipe section of the left air outlet pipe 212 is connected with the second straight pipe section of the left air outlet pipe 212 which passes through the second partition plate 204, the second chamber 215, the first partition plate 203, the first chamber 214, and the left end plate 202 to be connected with the left tail pipe 5; and the left air outlet pipe 212 is provided with a sound absorbing hole on the pipe section in the second chamber 215.

[0034] The right air outlet pipe 213 comprises a straight pipe section and a connecting section; the straight pipe section of the right air outlet pipe 213 passes through the first partition plate 203, the second chamber 215 and the second partition plate 204 from the first chamber 214, and is connected with the connecting section of the right air outlet pipe 213, the connecting section of the right air outlet pipe 213 passes through the third partition plate 205, the fourth chamber 217, the fourth partition plate 206, the fifth chamber 218 and the right end plate 207 from the third chamber 216, and is connected with the right tail pipe 6; the right air outlet pipe 213 is provided with a sound absorbing hole on the pipe section in the second chamber 215.

[0035] The working principle of the exhaust system provided in the embodiment is as follows: the upstream exhaust device connected with the intermediate pipe 1 is a catalytic converter; after the airflow passes through the intermediate pipe 1, the airflow enters the housing 201 through the air inlet pipe 208, and first enters the third chamber 216; in the third chamber 216, part of the airflow enters the first chamber 214 through the passive valve integrated pipe 211, and then enters the left air outlet pipe 212 and the right air outlet pipe 213 respectively, and finally is discharged to the atmosphere; the other part of the airflow enters the air inlet tuning pipe 210, and reaches the fifth chamber 218; the passive valve integrated pipe 211 is mainly used for suppressing low-frequency noise; the air inlet tuning pipe 210 is provided with a sound absorbing hole on the pipe section in the fourth chamber 217, and can absorb high-frequency airflow noise; the pipe section of the air inlet tuning pipe 210 in the fifth chamber 218 can suppress low-frequency standing wave noise caused by the intermediate pipe 1; the left air outlet pipe 212 is provided with a sound absorbing hole on the pipe section in the second chamber 215, and the right air outlet pipe 213 is provided with a sound absorbing hole on the pipe section in the second chamber 215, both of which can absorb high-frequency airflow noise.

[0036] More preferably, the second chamber 215 is provided with sound-absorbing cotton 219;

[0037] More preferably, the fourth chamber 217 is provided with sound-absorbing cotton 219;

[0038] The sound-absorbing cotton 219 in the second chamber 215 and the fourth chamber 217 can both absorb high-frequency airflow noise.

[0039] More preferably, the tail muffler 2 further comprises a first support 220 and a second support 221; the first support 220 connects the first partition plate 203 and the second partition plate 204, and the second support 221 connects the third partition plate 205 and the fourth partition plate 206; the first support 220 and the second support 221 can reduce the vibration of the tail muffler 2.

[0040] More preferably, the left tail pipe 5 and the right tail pipe 6 are respectively connected with hooks 3, and the hooks 3 are used for hanging the lifting lugs 4 arranged on the vehicle body.

[0041] More preferably, the intermediate pipe 1 is connected with a load block 7; the load block 7 can play a frequency deviation role, so that the natural frequency of the exhaust system deviates from the natural frequency of the vehicle body, and resonance caused by the two is prevented.

[0042] More preferably, the intermediate pipe 1 is provided with two hooks 3; the intermediate pipe 1 is connected more stably by connecting the two hooks with the lifting lugs 4 on the vehicle body, so as to reduce the vibration of the intermediate pipe 1.

[0043] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An exhaust system characterized by, The utility model relates to a tail muffler (2) and intermediate pipe (1) are connected, and the intermediate pipe (1) is connected with the upstream exhaust device, and the intermediate pipe (1) is connected with the tail muffler (2) on one end, and at least one hook (3) is arranged on the intermediate pipe (1). The tail muffler (2) comprises a shell (201), a left end plate (202), a first partition plate (203), a second partition plate (204), a third partition plate (205), a fourth partition plate (206), a right end plate (207), an air inlet pipe (208), an air inlet support (209), an air inlet tuning pipe (210), a passive valve integrated pipe (211), a left air outlet pipe (212), and a right air outlet pipe (213). The shell (201) is connected with the left end plate (202) and the right end plate (207) at both ends, respectively, and the first partition plate (203), the second partition plate (204), the third partition plate (205), and the fourth partition plate (206) are arranged in the shell (201) at intervals, thereby dividing the space in the shell (201) into the first chamber (214), the second chamber (215), the third chamber (216), the fourth chamber (217), and the fifth chamber (218) from the left end plate (202) to the right end plate (207) in sequence. The outer end of the air inlet pipe (208) is connected with the other end of the intermediate pipe (1) through the shell (201), and the air inlet pipe (208) is carried on the air inlet support (209), which is located in the third chamber (216) and connected with the second partition plate (204) and the third partition plate (205), respectively. The air inlet tuning pipe (210) comprises a bend pipe section and a straight pipe section connected in sequence, the port of the bend pipe section of the air inlet tuning pipe (210) is arranged opposite to the inner end of the air inlet pipe (208) with a distance in between, the straight pipe section of the air inlet tuning pipe (210) passes through the fourth partition plate (206), the fourth chamber (217), and the fourth partition plate (206) from the third chamber (216) into the fifth chamber (218), and the air inlet tuning pipe (210) is provided with a sound absorbing hole on the pipe section in the fourth chamber (217). The valve end and the pipe end of the passive valve integrated pipe (211) are fixed on the second partition plate (204) and the first partition plate (203), respectively, and the passive valve integrated pipe (211) passes through the second partition plate (204), the second chamber (215), and the first partition plate (203) from the third chamber (216) into the first chamber (214). ​ The left gas outlet pipe (212) comprises a first straight pipe section, a bent pipe section and a second straight pipe section; the first straight pipe section of the left gas outlet pipe (212) passes through the first partition plate (203), the second chamber (215) and the second partition plate (204) from the first chamber (214), is connected with one end of the bent pipe section of the left gas outlet pipe (212) arranged in the third chamber (216), the other end of the bent pipe section of the left gas outlet pipe (212) is connected with the second straight pipe section of the left gas outlet pipe (212), the second straight pipe section of the left gas outlet pipe (212) passes through the second partition plate (204), the second chamber (215), the first partition plate (203), the first chamber (214) and the left end plate (202) and is connected with the left tail pipe (5); the left gas outlet pipe (212) is provided with a sound absorbing hole on the pipe section in the second chamber (215); The right gas outlet pipe (213) comprises a straight pipe section and a connecting section; the straight pipe section of the right gas outlet pipe (213) passes through the first partition plate (203), the second chamber (215) and the second partition plate (204) from the first chamber (214) and is connected with the connecting section of the right gas outlet pipe (213), the connecting section of the right gas outlet pipe (213) passes through the third partition plate (205), the fourth chamber (217), the fourth partition plate (206), the fifth chamber (218) and the right end plate (207) from the third chamber (216) and is connected with the right tail pipe (6); the right gas outlet pipe (213) is provided with a sound absorbing hole on the pipe section in the second chamber (215).

2. The exhaust system according to claim 1, wherein, Sound absorbing cotton (219) is arranged in the second chamber (215).

3. The exhaust system according to claim 1, wherein, Sound absorbing cotton (219) is arranged in the fourth chamber (217).

4. The exhaust system according to claim 1, wherein, The tail muffler (2) further comprises a first support (220) and a second support (221); the first support (220) connects the first partition plate (203) and the second partition plate (204), and the second support (221) connects the third partition plate (205) and the fourth partition plate (206).

5. The exhaust system according to claim 1, wherein, Hooks (3) are respectively arranged on the left tail pipe (5) and the right tail pipe (6).

6. The exhaust system according to claim 1, wherein, A load block (7) is arranged on the intermediate pipe (1).

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