CN219870312U - Automobile exhaust emission device - Google Patents

Automobile exhaust emission device Download PDF

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Publication number
CN219870312U
CN219870312U CN202321153034.5U CN202321153034U CN219870312U CN 219870312 U CN219870312 U CN 219870312U CN 202321153034 U CN202321153034 U CN 202321153034U CN 219870312 U CN219870312 U CN 219870312U
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gas
exhaust
pipe
hydrogen
automobile
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张俊林
田务海
林雨
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Suzhou Zuozhu Hot And Cold Control Technology Co ltd
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Suzhou Zuozhu Hot And Cold Control Technology Co ltd
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Abstract

The utility model discloses an automobile exhaust emission device, which belongs to the field of energy automobile test environment simulation, and comprises an environment cabin, wherein a hydrogen discharging system for collecting automobile exhaust of a hydrogen fuel cell is arranged on the environment cabin; the hydrogen discharging system is connected with a gas-water separation system for separating water and gas in the hydrogen fuel automobile exhaust and discharging the water and gas, and the gas-water separation system is fixedly connected with an exhaust emission system for collecting air or fuel automobile exhaust in the cabin; the environmental chamber is also connected with a forced ventilation system for discharging hydrogen possibly leaked in the environmental chamber in real time. Through the mode, the tail gas of the hydrogen fuel cell automobile is collected through the hydrogen discharging system and is led into the air-water inlet separation system; the gas-water separation system separates and discharges water in the waste gas and the waste gas; when the hydrogen fuel cell is used for the automobile, the tail gas emission system is used as air in the replacement cabin, so that the cabin pressure can be ensured to be normal; in the case of a fuel automobile, the tail gas is discharged to the outside of the environmental cabin through a tail gas discharge system.

Description

Automobile exhaust emission device
Technical Field
The utility model relates to the field of energy automobile test environment simulation, in particular to an automobile exhaust emission device.
Background
Hydrogen has become an important component of future energy sources.
With the continuous and deep research of hydrogen energy, the application of hydrogen energy has achieved numerous achievements. The hydrogen fuel cell, the hydrogen fuel cell engine and the hydrogen fuel cell automobile are sequentially arranged, which has important significance for improving the environment, optimizing the energy structure of China and the like. Hydrogen is inflammable and explosive gas, the explosion limit is 4-75.6 percent (volume concentration), and the coverage range is extremely wide; in addition, how to treat the moisture generated by the combustion of hydrogen is also a great difficulty in the application of hydrogen energy. These characteristics of hydrogen increase the risk of hydrogen energy use and place higher demands on hydrogen energy use equipment and related test equipment.
In the running process of an automobile environment simulation laboratory, in order to ensure the control precision and stability of environmental parameters, automobile exhaust needs to be discharged outside the laboratory in time. However, the hydrogen fuel cell automobile may have insufficient hydrogen combustion in the running process, so that the exhausted tail gas contains hydrogen, and the risk of combustion explosion exists; under the working condition of ultralow temperature (-below 30 ℃), the tail gas of the fuel cell automobile contains moisture, so that the tail gas is easy to condense into ice, and a waste discharge pipeline is blocked, so that the internal pressure of a laboratory is abnormal.
Chinese utility model publication No. CN215057683U discloses an exhaust emission system for fuel cell car environmental tanks, but the following drawbacks are also present: 1. at low temperature, the pipeline is easy to freeze, and the whole waste discharge pipeline is easy to be blocked along with long-time test; 2. the whole waste discharge system is placed in the cabin and needs to be subjected to heat preservation and heating treatment; 3. if the hydrogen leaks, the hydrogen cannot be discharged out of the environmental chamber in real time.
Based on the above, the present utility model has devised an automobile exhaust emission device to solve the above-mentioned problems.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model provides an automobile exhaust emission device.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
an automobile exhaust emission device comprises an environmental cabin, wherein a hydrogen discharging system for collecting automobile exhaust of a hydrogen fuel cell is arranged on the environmental cabin A; the environmental cabin A is connected with an exhaust emission system for collecting the tail gas of the traditional fuel automobile and replacing the air in the environmental cabin; the environmental cabin A is also connected with a forced ventilation system for discharging leaked hydrogen in the environmental cabin A; the hydrogen exhaust system is provided with a gas-water separation system for separating water in the tail gas of the hydrogen fuel automobile and discharging the water, one group of gas inlets of the gas-water separation system are connected with the gas outlets of the hydrogen exhaust system, the other group of gas inlets of the gas-water separation system are connected with the gas outlets of the tail gas discharge system, the gas-water separation system is connected with an exhaust assembly, the exhaust assembly is connected with a forced ventilation system, and the exhaust system discharges the exhaust gas in the environmental cabin to the atmosphere after the exhaust gas of the gas-water separation system and the forced ventilation system are summarized.
Further, the hydrogen discharging system comprises a hydrogen tail gas collecting device and a plug-in connecting pipe; when the experimental automobile B is a hydrogen fuel cell automobile, one end of the hydrogen tail gas collecting device is inserted into an exhaust pipe of the experimental automobile, and the other end of the hydrogen tail gas collecting device is inserted into one end of the inserted connecting pipe; when the experimental automobile is a traditional fuel automobile, the hydrogen tail gas collecting device is not connected with the experimental automobile; the other end of the plugging connecting pipe is fixedly connected with the gas-water separation system;
further, the hydrogen tail gas collecting device comprises a horn-shaped collecting port, a sealing ring and a straight pipe; one end of the horn-shaped collecting port is fixedly connected with the sealing ring, the sealing ring is connected with an exhaust pipe of an experimental automobile in a plugging manner, and the other end of the horn-shaped collecting port is fixedly connected with the straight pipe.
Furthermore, one end of the plugging connecting pipe is plugged with the straight pipe of the hydrogen tail gas collecting device, and the other end of the plugging connecting pipe is fixedly connected with the gas-water separation system.
Further, the gas-water separation system comprises a gas-water separator, a drain pipe and an exhaust pipe; the bottom end of the gas-water separator and the water outlet of the exhaust pipe are fixedly connected with the water inlet of the drain pipe, the water outlet of the drain pipe is communicated with the outside, the top end of the gas-water separator and the air outlet of the exhaust pipe are fixedly connected with the exhaust assembly, the air inlet of the exhaust pipe is fixedly connected with the exhaust gas emission system, and the gas-water separator is fixedly connected with one end of the plug-in connecting pipe.
Further, the gas-water separator comprises an air inlet, an air outlet, a water outlet and a plurality of partition boards; one end of the plug-in connecting pipe is fixedly connected with an air inlet of the gas-water separator, an air outlet of the gas-water separator is fixedly connected with an air inlet of the exhaust pipe, a plurality of baffles are arranged inside the gas-water separator, and a water outlet of the gas-water separator is fixedly connected with a water inlet of the drain pipe respectively.
Further, the exhaust assembly comprises an explosion-proof fan and an exhaust pipe; an air inlet of the exhaust pipe is fixedly connected with the gas-water separator and the exhaust pipe, an air outlet of the exhaust pipe is fixedly connected with one end of the explosion-proof fan, and the other end of the explosion-proof fan is communicated with air.
Further, the exhaust emission system includes a folded gas collection tube and a first valve; the air inlet end of the folding gas collecting pipe is inserted into the environment cabin A, the air outlet end of the folding gas collecting pipe is fixedly connected with the air inlet of the exhaust pipe, and the first valve is arranged on a pipeline of the folding gas collecting pipe.
Still further, the forced ventilation system includes a forced ventilation device and a second valve; an air inlet of the forced air interchanger is fixedly connected with the environmental cabin, an air outlet of the forced air interchanger is fixedly connected with the side face of the exhaust pipe, and a second valve is arranged on the pipeline of the forced air interchanger.
Advantageous effects
The utility model collects the tail gas of the hydrogen fuel cell car through the hydrogen discharging system and guides the tail gas into the air-water separation system; the gas-water separation system separates water vapor in the waste gas from the waste gas and discharges the water vapor and the waste gas respectively; when the experimental automobile is a hydrogen fuel cell automobile and the environment cabin is closed, the exhaust emission system can exhaust the redundant air in the cabin to the outside of the cabin through the gas-water separation system, and the exhaust emission system can be used as the air in the replacement cabin to ensure the normal cabin pressure; when the experimental automobile is a traditional fuel automobile, automobile tail gas enters a gas-water separation system through a tail gas emission system and is discharged outside an environmental cabin; the forced ventilation system can discharge the leaked hydrogen and redundant air out of the environmental cabin in the tail gas collecting process, so that the air pressure in the environmental cabin and the danger caused by the leakage of the hydrogen are prevented.
The experiment is completed by the hydrogen tail gas collecting device, the collected hydrogen tail gas is discharged into the gas-water separation system when the experimental automobile is a hydrogen fuel cell automobile through the plug-in connecting pipe; the gas-water separation system can separate water vapor in the waste gas, then the water vapor is discharged, and the dried waste gas enters the exhaust assembly; the gas-water separator can separate water vapor in the waste gas from other waste gases, the water vapor is converted into water drops to flow away, condensation or icing in the waste gas pipe is avoided, the exhaust efficiency is reduced, a pipeline is blocked, and dry waste gas is discharged into the air; the exhaust component is an exhaust path of the exhaust gas, and the exhaust gas in the experimental automobile and the environmental cabin enters the gas-water separation system and is finally discharged into the air.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of an automobile exhaust emission device in the experiment of a hydrogen fuel automobile;
fig. 2 is a schematic diagram of an automobile exhaust emission device in the fuel vehicle experiment.
Reference numerals in the drawings represent respectively: 1. a hydrogen tail gas collection device; 2. an explosion-proof fan; 3. a drain pipe; 4. an exhaust pipe; 5. folding the gas collection tube; 6. a forced ventilation device; 7. a gas-water separator; 8. a second valve; 9. a first valve; 10. inserting a connecting pipe; 11. and an exhaust pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model is further described below with reference to examples.
Example 1
Referring to fig. 1 of the specification, an automobile exhaust emission device comprises an environmental chamber a;
the environment cabin A is provided with a hydrogen discharging system for collecting and conveying the tail gas of the hydrogen fuel cell automobile to the gas-water separation system;
the hydrogen discharging system comprises a hydrogen tail gas collecting device 1 and a plug-in connection pipe 10; when the experimental automobile B is a hydrogen fuel cell automobile, one end of the hydrogen tail gas collecting device 1 is inserted into an exhaust pipe of the experimental automobile B, and the other end of the hydrogen tail gas collecting device 1 is inserted into one end of the inserted connecting pipe 10; when the experimental automobile B is a traditional fuel automobile, the hydrogen tail gas collecting device 1 is not connected with the experimental automobile B; the other end of the plugging connecting pipe 10 is fixedly connected with the gas-water separation system;
when the experimental automobile B is a hydrogen fuel cell automobile, the hydrogen tail gas collecting device 1 collects the exhaust gas discharged by the exhaust pipe of the experimental automobile B and transmits the exhaust gas to the plug-in connecting pipe 10, and the plug-in connecting pipe 10 guides the exhaust gas into the gas-water separation system;
the hydrogen discharging system collects the tail gas of the hydrogen fuel cell automobile, inputs the tail gas into the air-water inlet separation system and finally discharges the tail gas into the atmosphere;
the hydrogen tail gas collecting device 1 comprises a horn-shaped collecting port, a sealing ring and a straight pipe; one end of the horn-shaped collecting port is fixedly connected with a sealing ring, the sealing ring is connected with an exhaust pipe of the experimental automobile B in an inserting mode, and the other end of the horn-shaped collecting port is fixedly connected with a straight pipe;
the sealing ring is connected with the exhaust pipe of the experimental automobile B in an inserting way, so that the tail gas can be prevented from leaking into the environmental cabin A, the moisture in the tail gas is prevented from condensing, and the pipeline is blocked;
the hydrogen tail gas collecting device 1 is used for collecting the tail gas of the hydrogen fuel cell automobile;
one end of the plugging connecting pipe 10 is plugged with a straight pipe of the hydrogen tail gas collecting device 1, and the other end of the plugging connecting pipe 10 is fixedly connected with the gas-water separation system;
the plugging connection pipe 10 guides the waste gas in the straight pipe of the hydrogen tail gas collecting device 1 into the gas-water separation system, and the explosion-proof electric heating belt heats and keeps the plugging connection pipe 10 to prevent the water in the tail gas from condensing and blocking the pipeline;
when the experimental automobile B is a hydrogen fuel cell automobile, the plugging connection pipe 10 discharges the collected hydrogen tail gas into a gas-water separation system;
the automobile exhaust emission device further comprises a gas-water separation system for separating water and gas, and the hydrogen discharge system and the exhaust emission system are connected with the gas-water separation system;
the gas-water separation system comprises a gas-water separator 7, a water drain pipe 3 and an exhaust pipe 11; the bottom end of the gas-water separator 7 and the water outlet of the exhaust pipe 11 are fixedly connected with the water inlet of the drain pipe 3, the water outlet of the drain pipe 3 is communicated with the outside, the top end of the gas-water separator 7 and the air outlet of the exhaust pipe 11 are fixedly connected with an exhaust assembly, wherein the air inlet of the exhaust pipe 11 is fixedly connected with an exhaust gas discharge system, and the gas-water separator 7 is fixedly connected with one end of the plug-in connection pipe 10;
the waste gas inserted into the connecting pipe 10 enters the gas-water separator 7, the gas-water separator 7 separates the waste gas from water vapor, the waste gas in the tail gas emission system enters the exhaust assembly through the exhaust pipe 11, the waste gas is discharged into air through the exhaust assembly, the water vapor is pre-condensed into water drops, and the water drops are discharged through the water outlet of the drain pipe 3;
the gas-water separation system can separate water vapor in the waste gas, then the water vapor is discharged, and the dried waste gas enters the exhaust assembly;
the gas-water separator 7 comprises an air inlet, an air outlet, a water outlet and a plurality of partition boards; one end of the plugging connecting pipe 10 is fixedly connected with an air inlet of the gas-water separator 7, an air outlet of the gas-water separator 7 is fixedly connected with an air inlet of the exhaust pipe 4, a plurality of baffles are arranged inside the gas-water separator 7, and a water outlet of the gas-water separator 7 is fixedly connected with a water inlet of the drain pipe 3 respectively;
the wet waste gas in the plug-in connecting pipe 10 enters the gas-water separator 7, water vapor in the waste gas contacts with the partition plate to be water-dropped, flows out from the water outlet, enters the drain pipe 3, flows out from the air outlet of the gas-water separator 7, enters the exhaust assembly through the separated dry waste gas, and is discharged into the air through the exhaust assembly;
the gas-water separator 7 can separate water vapor in the exhaust gas from other exhaust gas, the water vapor is converted into water drops to flow away, condensation or icing in an exhaust gas pipe is avoided, the exhaust efficiency is reduced, a pipeline is blocked, and dry exhaust gas is discharged into the air;
the exhaust assembly comprises an explosion-proof fan 2 and an exhaust pipe 4; the air inlet of the exhaust pipe 4 is fixedly connected with the air outlet of the gas-water separator 7, the air outlet of the exhaust pipe 4 is fixedly connected with one end of the explosion-proof fan 2, and the other end of the explosion-proof fan 2 is communicated with air;
the exhaust pipe 4 is connected with the top of the gas-water separator 7 and the top of the exhaust pipe 11;
the separated dry waste gas enters into a waste gas pipe 4, and the waste gas in the waste gas pipe 4 is discharged into the air through the unidirectional discharge of the explosion-proof fan 2;
the exhaust component is an exhaust path of the exhaust gas, and the exhaust gas in the experimental automobile B and the environmental cabin A enters a gas-water separation system and is finally exhausted into the air;
the gas-water separation system is fixedly connected with an exhaust emission system for collecting redundant air in the cabin or traditional fuel automobile exhaust;
when the experimental automobile B is a traditional fuel automobile, the tail gas in the environmental cabin A can be discharged by the tail gas discharge system, and when the experimental automobile B is a hydrogen fuel cell automobile, the air in the environmental cabin A can be discharged by the gas discharge system;
the environmental cabin A is also connected with a forced ventilation system for discharging leaked hydrogen in the environmental cabin A;
the forced ventilation system is connected with the exhaust assembly and the top end of the environmental chamber A;
when hydrogen leaks in the environmental chamber A, the forced ventilation system discharges the leaked hydrogen into the exhaust assembly and then into the air.
Example 2
In some embodiments, as shown in fig. 1, as a preferred embodiment of the utility model, the exhaust gas emission system comprises a folded gas collection tube 5 and a first valve 9; the air inlet end of the folding gas collecting pipe 5 is inserted into the environmental chamber A, the air outlet end of the folding gas collecting pipe 5 is fixedly connected with the air inlet of the exhaust pipe 11, and the first valve 9 is arranged on a pipeline of the folding gas collecting pipe 5;
when the experimental automobile B is a hydrogen fuel cell automobile and the environment cabin A is closed, the first valve 9 is opened, and the folded gas collecting pipe 5 can discharge redundant air in the cabin to the outside of the cabin through the waste discharge pipe 4, so that the cabin pressure is ensured to be normal; when the experimental automobile B is a traditional fuel automobile, automobile tail gas enters the exhaust pipe 4 through the folding gas collecting pipe 5 and is discharged outside the environmental cabin. The water vapor is separated in the gas-water separator 7 and is discharged out of the cabin through the water discharge pipe 3;
the exhaust emission system can ensure that the whole emission device can not only exhaust the exhaust of the hydrogen fuel electric automobile, but also exhaust of the traditional fuel automobile.
Example 3
In some embodiments, as shown in fig. 1, as a preferred embodiment of the present utility model, the forced ventilation system includes a forced ventilation device 6 and a second valve 8; the air inlet of the forced air interchanger 6 is fixedly connected with the environmental cabin A, the air outlet of the forced air interchanger 6 is fixedly connected with the side surface of the exhaust pipe 4, and the second valve 8 is arranged on the pipeline of the forced air interchanger 6;
when the experimental automobile B is a hydrogen fuel cell automobile, if hydrogen leaks into the environmental cabin A in the collecting process, the hydrogen is accumulated at the top of the environmental cabin A due to smaller density, the second valve 8 is opened, and the leaked hydrogen is discharged out of the environmental cabin A through the forced ventilation device 6;
the forced ventilation system can discharge the leaked hydrogen out of the environmental chamber A in the tail gas collecting process, and the danger caused by the leakage of the hydrogen is prevented.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (9)

1. The utility model provides an automobile exhaust emission device, includes environment cabin A, its characterized in that: the environment cabin A is provided with a hydrogen discharging system for collecting the tail gas of the hydrogen fuel cell automobile; the environmental cabin A is connected with an exhaust emission system for collecting the tail gas of the traditional fuel automobile and replacing the air in the environmental cabin; the environmental cabin A is also connected with a forced ventilation system for discharging leaked hydrogen in the environmental cabin A; the hydrogen exhaust system is provided with a gas-water separation system for separating water in the tail gas of the hydrogen fuel automobile and discharging the water, one group of gas inlets of the gas-water separation system are connected with the gas outlets of the hydrogen exhaust system, the other group of gas inlets of the gas-water separation system are connected with the gas outlets of the tail gas discharge system, the gas-water separation system is connected with an exhaust assembly, the exhaust assembly is connected with a forced ventilation system, and the exhaust system discharges the exhaust gas in the environmental cabin to the atmosphere after the exhaust gas of the gas-water separation system and the forced ventilation system are summarized.
2. The automobile exhaust emission device according to claim 1, characterized in that the hydrogen exhaust system comprises a hydrogen exhaust collection device (1) and a plug connection pipe (10); when the experimental automobile B is a hydrogen fuel cell automobile, one end of the hydrogen tail gas collecting device (1) is inserted into an exhaust pipe of the experimental automobile B, and the other end of the hydrogen tail gas collecting device (1) is inserted into one end of an inserted connecting pipe (10); when the experimental automobile B is a traditional fuel automobile, the hydrogen tail gas collecting device (1) is detached from the plug-in connecting pipe (10); the other end of the plugging connecting pipe (10) is fixedly connected with the gas-water separation system.
3. The automobile exhaust gas discharge device according to claim 2, wherein the hydrogen exhaust gas collection device (1) includes a horn-shaped collection port, a seal ring, and a straight pipe; one end of the horn-shaped collecting port is fixedly connected with the sealing ring, the sealing ring is connected with the exhaust pipe of the experimental automobile B in an inserting mode, the other end of the horn-shaped collecting port is fixedly connected with the straight pipe, and the other end of the straight pipe is connected with one end of the inserting connecting pipe (10) in an inserting mode.
4. An automobile exhaust emission device according to claim 3, wherein one end of the plug-in connection pipe (10) is plugged with a straight pipe of the hydrogen exhaust collection device (1), and the other end of the plug-in connection pipe (10) is fixedly connected with the gas-water separation system.
5. The vehicle exhaust emission apparatus of claim 4, wherein the gas-water separation system component includes a gas-water separator (7), a drain pipe (3), and an exhaust pipe (11); the bottom end of the gas-water separator (7) and the water outlet of the exhaust pipe (11) are fixedly connected with the water inlet of the drain pipe (3), the water outlet of the drain pipe (3) is communicated with the outside, the top end of the gas-water separator (7) and the air outlet of the exhaust pipe (11) are fixedly connected with the exhaust assembly, the air inlet of the exhaust pipe (11) is fixedly connected with the tail gas emission system, and the gas-water separator (7) is fixedly connected with one end of the plug-in connecting pipe (10).
6. The exhaust emission device of the automobile according to claim 5, characterized in that the gas-water separator (7) comprises an air inlet, an air outlet, a water outlet and a plurality of baffles; one end of the plugging connecting pipe (10) is fixedly connected with an air inlet of the gas-water separator (7), an air outlet of the gas-water separator (7) is fixedly connected with an air inlet of the exhaust pipe (4), a plurality of baffles are arranged inside the gas-water separator (7), and a water outlet of the gas-water separator (7) is fixedly connected with a water inlet of the drain pipe (3) respectively.
7. The vehicle exhaust system according to claim 6, characterized in that the exhaust assembly comprises an explosion-proof fan (2) and an exhaust pipe (4); an air inlet of the exhaust pipe (4) is fixedly connected with the gas-water separator (7) and the exhaust pipe (11), an air outlet of the exhaust pipe (4) is fixedly connected with one end of the explosion-proof fan (2), and the other end of the explosion-proof fan (2) is communicated with air.
8. The vehicle exhaust system according to claim 7, characterized in that the exhaust system comprises a folded gas collection tube (5) and a first valve (9); the air inlet end of the folding gas collecting pipe (5) is inserted into the environment cabin A, the air outlet end of the folding gas collecting pipe (5) is fixedly connected with the air inlet of the exhaust pipe (11), and the first valve (9) is arranged on a pipeline of the folding gas collecting pipe (5).
9. The vehicle exhaust system according to claim 8, characterized in that the forced ventilation system comprises a forced ventilation device (6) and a second valve (8); an air inlet of the forced air interchanger (6) is fixedly connected with the environmental cabin A, an air outlet of the forced air interchanger (6) is fixedly connected with the side face of the exhaust pipe (4), and a second valve (8) is arranged on a pipeline of the forced air interchanger (6).
CN202321153034.5U 2023-05-15 2023-05-15 Automobile exhaust emission device Active CN219870312U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321153034.5U CN219870312U (en) 2023-05-15 2023-05-15 Automobile exhaust emission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321153034.5U CN219870312U (en) 2023-05-15 2023-05-15 Automobile exhaust emission device

Publications (1)

Publication Number Publication Date
CN219870312U true CN219870312U (en) 2023-10-20

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Application Number Title Priority Date Filing Date
CN202321153034.5U Active CN219870312U (en) 2023-05-15 2023-05-15 Automobile exhaust emission device

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CN (1) CN219870312U (en)

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