Vehicle exhaust system and vehicle

Abstract

The utility model relates to the technical field of vehicle exhaust systems, in particular to a vehicle exhaust system and a vehicle, comprising a catalytic converter, a particulate filter, a silencer module communicated with the catalytic converter and used for reducing exhaust noise, and a cleaning module communicated with the particulate filter and the silencer module and used for cleaning the exhaust noise. The cleaning module is used for collecting condensate water of the silencer module to clean the particulate filter, the cleaning module comprises a water storage assembly, a high-pressure water pump and an ejector, and the water storage assembly is communicated with the silencer module; the high-pressure water pump communicates with the water storage assembly and the ejector. The end, away from the high-pressure water pump, of the ejector communicates with the particle trap. The cleaning mode is directly carried out on the vehicle, dismounting is not needed, the shutdown time of the vehicle due to cleaning of the particle trap is greatly shortened, and the use efficiency of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle exhaust systems, and in particular to a vehicle exhaust system and a vehicle. Background Art

[0002] As global warming and the greenhouse effect become increasingly severe, countries around the world are increasingly tightening limits on vehicle emissions. The gradual implementation of China VI emissions regulations has imposed extremely stringent standards on both the quality and quantity of emitted particulate matter. To meet these requirements, particulate filters are widely used in vehicle exhaust treatment systems to filter particulate matter from exhaust gases.

[0003] During the operation of the particulate filter, particulate matter in the exhaust gas gradually accumulates and remains as it passes through the porous media wall of the filter, causing exhaust backpressure to continuously increase. When exhaust backpressure exceeds a certain limit, engine performance will significantly decline. To maintain normal operation of the particulate filter and the engine, the deposited particulate matter in the filter must be removed. This process is called particulate filter regeneration.

[0004] Particulate filter regeneration is primarily categorized as active or passive. Active regeneration requires additional energy to raise the filter temperature, burning the deposited particulate matter and restoring the filter to a clean state. Passive regeneration utilizes chemical catalysis to reduce the reactivity of the particulate matter, allowing it to burn under normal operating conditions. However, regardless of the regeneration method, after burning the particulate matter, substances that are difficult or impossible to burn, as well as residual ash, remain. Over time, these substances can accumulate in the particulate filter, further increasing exhaust backpressure and affecting vehicle fuel consumption. Particulate blockage can also lead to the failure of the particulate filter, affecting exhaust emissions. Therefore, the particulate filter must be removed from the vehicle for cleaning. However, removing the particulate filter from the entire exhaust system is time-consuming and labor-intensive, and the removal and installation process also increases vehicle downtime. Utility Model Content

[0005] In view of this, the present application aims to provide a vehicle exhaust system and a vehicle to solve the problem that the particulate filter needs to be removed from the vehicle for cleaning.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0007] A first aspect of the present application provides a vehicle exhaust system, comprising:

[0008] catalytic converter;

[0009] a particulate trap in communication with the catalytic converter;

[0010] a silencer module, in communication with the particulate filter, for reducing exhaust noise;

[0011] a cleaning module, in communication with the particulate filter and the silencer module respectively, for collecting condensed water of the silencer module to clean the particulate filter;

[0012] the cleaning module comprises a water storage assembly, a high-pressure water pump and a sprayer;

[0013] the water storage assembly is in communication with the silencer module;

[0014] the high-pressure water pump is in communication with the water storage assembly and the sprayer respectively;

[0015] an end of the sprayer away from the high-pressure water pump is in communication with the particulate filter.

[0016] Optionally, the cleaning module further comprises a first electromagnetic valve and a second electromagnetic valve;

[0017] the first electromagnetic valve is arranged between the particulate filter and the silencer module and is in communication with the particulate filter and the silencer module respectively;

[0018] the second electromagnetic valve is in communication with the particulate filter, and an end of the second electromagnetic valve is in communication with the outside world.

[0019] Optionally, the vehicle exhaust system further comprises a control module;

[0020] the high-pressure water pump, the sprayer, the first electromagnetic valve and the second electromagnetic valve are electrically connected with the control module;

[0021] in the cleaning mode, the control module controls the first electromagnetic valve to be closed, the second electromagnetic valve to be opened, and controls the high-pressure water pump and the sprayer to work, so as to clean the particulate filter;

[0022] in the normal mode, the control module controls the first electromagnetic valve to be opened, and the second electromagnetic valve and the sprayer to be closed, so as to ensure the vehicle exhaust system to exhaust smoothly.

[0023] Optionally, the water storage assembly comprises a water storage tank and a filter unit;

[0024] the water storage tank is in communication with the silencer module and the high-pressure water pump respectively;

[0025] the filter unit is arranged between the water storage tank and the silencer module.

[0026] Optionally, the water storage assembly further comprises a liquid level sensor and a third electromagnetic valve;

[0027] The liquid level sensor is arranged inside the water storage tank, and the third electromagnetic valve is arranged between the water storage tank and the muffler module.

[0028] Optionally, the filter unit comprises a coarse filter screen and a fine filter screen.

[0029] The pore size of the coarse filter screen is larger than that of the fine filter screen, and the coarse filter screen and the fine filter screen are arranged in sequence along the direction from the muffler module to the water storage tank.

[0030] Optionally, the filter unit further comprises an activated carbon adsorption layer, which is arranged between the fine filter screen and the water storage tank.

[0031] Optionally, a plurality of injectors are arranged, and each of the injectors is communicated at a different position of the particle trap so that the coverage areas of the injectors for spraying into the particle trap are different.

[0032] Optionally, a plurality of injectors are arranged, and each of the injectors is communicated at the same position on the particle trap, and the angles of each of the injectors towards the inside of the particle trap are different, so that the angles of the injectors for spraying into the particle trap are different.

[0033] The second aspect of the embodiments of the present application provides a vehicle, which comprises the vehicle exhaust system provided in the first aspect.

[0034] Compared with the prior art, the vehicle exhaust system and the vehicle provided in the present application have the following advantages:

[0035] The problem of the particle trap being blocked by residual substances after burning particulate matters is effectively solved, the good filtering performance of the particle trap is maintained, and the particle trap can continuously and effectively capture particulate matters in exhaust gas, so that the vehicle exhaust emission meets the standard, and the normal working performance of the engine is also maintained, avoiding problems such as the increase of exhaust back pressure and the decrease of engine performance caused by the blockage of the particle trap.

[0036] Meanwhile, the conventional particle trap cleaning method may need to dismount the particle trap from the vehicle, which often needs to consume a large amount of time. The cleaning method in the present application is directly performed on the vehicle without dismounting, which greatly shortens the downtime of the vehicle for cleaning the particle trap, and improves the use efficiency of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The accompanying drawings should not be construed as an inappropriate limitation on the present application. In the drawings:

[0038] Figure 1 A structural connection diagram of a vehicle exhaust system and a vehicle according to an embodiment of the present application is shown in the following figure;

[0039] Figure 2 A control module connection diagram of a vehicle exhaust system and a vehicle according to an embodiment of the present application is shown in the following figure.

[0040] Explanation of reference signs:

[0041] Catalytic converter 1, particulate trap 2, muffler module 3, water storage assembly 41, high-pressure water pump 42, sprayer 43, first electromagnetic valve 44, second electromagnetic valve 45, air cleaner 5, turbocharger 6, intercooler heat dissipation module 7, engine 8, control module 100. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] As shown in the following figure, the first aspect of the present application provides a vehicle exhaust system, comprising: Figure 1

[0044] Catalytic converter 1;

[0045] Particulate trap 2, in communication with the catalytic converter 1;

[0046] Muffler module 3, in communication with the particulate trap 2, for reducing exhaust noise;

[0047] Cleaning module, in communication with the particulate trap 2 and the muffler module 3 respectively, for collecting condensate water of the muffler module 3 to clean the particulate trap 2;

[0048] The cleaning module comprises a water storage assembly 41, a high-pressure water pump 42, and a sprayer 43;

[0049] The water storage assembly 41 is in communication with the muffler module 3;

[0050] The high-pressure water pump 42 is in communication with the water storage assembly 41 and the sprayer 43 respectively;

[0051] The sprayer 43 is in communication with the particulate trap 2 at the end away from the high-pressure water pump 42.

[0052] ​The catalytic converter 1 is mainly used to purify the exhaust gas emitted by the engine. The particulate filter 2 can effectively intercept the particulate matter in the exhaust gas during engine operation, preventing it from being directly discharged into the atmosphere and causing environmental pollution. As the use time increases, a large amount of particulate matter will accumulate in the particulate filter 2, causing the exhaust back pressure to rise and affecting the performance of the engine. Therefore, regular regeneration treatment is needed to restore its filtering performance to continuously and effectively capture particulate matter, ensuring that the mass and number of particulate matter emitted by the vehicle meet the emission standards.

[0053] The muffler module 3 can effectively reduce the noise of the exhaust gas emitted by the engine during high-speed flow. The muffler module 3 has a special structure and acoustic design, such as the use of sound-absorbing materials, expansion chambers, and resonance cavities, to reflect, interfere, and absorb sound waves when the exhaust gas passes through the muffler module 3, thereby reducing exhaust noise and reducing noise pollution during vehicle operation, improving the comfort of the vehicle.

[0054] As shown in Figure 1 In the vehicle, the catalytic converter 1 is connected with an air filter 5, a turbocharger 6, a mid-cooling heat dissipation module 7, an engine 8, and other components to form a complete vehicle exhaust system from the entry of air into the vehicle to the exhaust of the vehicle. The details are not described here.

[0055] In the cleaning module, the water storage assembly 41 is in communication with the muffler module 3 for collecting the condensed water generated by the muffler module. It contains a filtering unit inside, which can filter the condensed water and remove impurities, providing clean water source for cleaning the particulate filter 2. The high-pressure water pump 42 is in communication with the water storage assembly 41 and the injector 43 respectively. Its function is to pressurize the water in the water storage assembly to obtain sufficient pressure so that it can effectively clean the particulate filter 2 through the injector 43. The injector 43 is in communication with the high-pressure water pump 42 at one end and the particulate filter 2 at the other end. Its function is to spray the pressurized water from the high-pressure water pump into the particulate filter 2, and remove the residual difficult-to-burn substances and ash in the particulate filter 2 through the impact force of the water flow.

[0056] By pressurizing the water through the high-pressure water pump 42 and spraying the high-pressure water into the particulate filter 2 through the injector 43, a strong impact force can be generated to effectively remove the difficult-to-burn substances and ash remaining in the particulate filter 2. This high-pressure cleaning method is more efficient than traditional cleaning methods, and can be directly cleaned on the vehicle without the need to disassemble the particulate filter 2, simplifying the difficulty of cleaning and maintenance operation, and reducing the downtime of the vehicle for cleaning.

[0057] The condensed water generated by the muffler module 3 is used as a cleaning water source, realizing reasonable utilization of resources, without the need for additional cleaning water, reducing costs, and also meeting the concepts of environmental protection and energy saving.

[0058] Further, the cleaning module further comprises a first electromagnetic valve 44 and a second electromagnetic valve 45.

[0059] The first electromagnetic valve 44 is arranged between the particulate filter 2 and the muffler module 3 and is in communication with the particulate filter 2 and the muffler module 3, respectively.

[0060] The second electromagnetic valve 45 is in communication with the particulate filter 2 and is in communication with the outside at one end.

[0061] The first electromagnetic valve 44 is arranged between the particulate filter 2 and the muffler module 3 and is in communication with the particulate filter 2 and the muffler module 3, respectively. In the normal mode, i.e. in the normal exhaust state, it is always in an open state, ensuring the normal exhaust process of the exhaust system, so that the exhaust gas can flow smoothly from the particulate filter 2 to the muffler module 3. When the particulate filter 2 is in the cleaning mode, it is in a closed state, preventing the cleaning water from flowing back to the muffler module 3, ensuring that the cleaning water can effectively clean the particulate filter 2, and avoiding waste of water resources and unnecessary impact on the muffler module 3.

[0062] The second electromagnetic valve 45 is in communication with the particulate filter 2 and is in communication with the outside at one end. In the normal mode, it is always in a closed state, preventing foreign matter from entering the particulate filter 2. When the particulate filter 2 is in the cleaning mode, it is in an open state, providing an outlet for the cleaned sewage and impurities, so that the cleaned sewage and the removed particulate matter can flow out of the particulate filter 2 smoothly, keeping the interior of the particulate filter 2 clean.

[0063] By controlling the opening and closing states of the first electromagnetic valve 44 and the second electromagnetic valve 45, the reasonable switching between the exhaust and cleaning modes is realized. In normal exhaust, the exhaust is smooth, maintaining the normal operation of the vehicle exhaust system; in cleaning, the muffler module 3 is effectively isolated, improving the cleaning efficiency and effect, and protecting the muffler module from interference during the cleaning process.

[0064] This arrangement ensures the normal operation of the particulate filter 2 under different working conditions. In normal use, it avoids contamination of the particulate filter 2 by foreign matter; in cleaning, it timely discharges the sewage and impurities generated during cleaning, which is conducive to the cleaning and maintenance of the particulate filter 2, prolongs its service life, and ensures the stability of its filtering performance.

[0065] As shown in Figures 1-2 Further, the vehicle exhaust system further comprises a control module 100.

[0066] The high-pressure water pump 42, the injector 43, the first electromagnetic valve 44, and the second electromagnetic valve 45 are electrically connected with the control module 100.

[0067] In the cleaning mode, the control module 100 controls the first electromagnetic valve 44 to be closed, the second electromagnetic valve 45 to be opened, and controls the high-pressure water pump 42 and the injector 43 to work, so as to clean the particulate filter 2.

[0068] In the normal mode, the control module 100 controls the first electromagnetic valve 44 to be opened, and controls the second electromagnetic valve 45 and the injector 43 to be closed, so as to ensure that the vehicle exhaust system can smoothly exhaust.

[0069] The control module 100 is a control unit of the vehicle exhaust system, which can be connected with the vehicle on-board system and become a part of the vehicle on-board system. It is responsible for coordinating and controlling the work of each related component to ensure the normal operation of the system under different working conditions. It receives information from various sensors of the vehicle, such as the driving mileage sensor, the exhaust emission sensor, etc., and sends control instructions to the components such as the high-pressure water pump 42, the injector 43, the first electromagnetic valve 44, and the second electromagnetic valve 45 according to the preset logic and algorithm.

[0070] When the trigger conditions of the cleaning mode are met, such as the vehicle driving mileage ≥ 10,000 km, the vehicle on-board system can remind the user that cleaning is needed, which can be voice reminder or on-board screen information reminder, which will not be described in detail here. Then the user starts the cleaning mode through the vehicle on-board system control module 100. First, it controls the first electromagnetic valve 44 to be closed, cutting off the passage between the particulate filter 2 and the muffler module 3, preventing the backflow of cleaning water. Then, it controls the second electromagnetic valve 45 to be opened, providing a discharge channel for the sewage and impurities after cleaning. Then, it controls the high-pressure water pump 42 to work, pressurizing the water in the water storage assembly 41. Finally, it controls the injector 43 to work, spraying the pressurized water into the particulate filter 2 for cleaning.

[0071] Through the above steps, efficient cleaning of the particulate filter 2 is achieved. The sewage and impurities after cleaning can be smoothly discharged, and the residual difficult-to-burn substances and ash and other blockages in the particulate filter 2 are removed, restoring the filtering performance of the particulate filter 2, ensuring that it can continuously and effectively capture particulate matter in the exhaust gas, so that the vehicle exhaust emission meets the standard, and problems such as increased exhaust back pressure and decreased engine performance caused by blockage of the particulate filter 2 are avoided.

[0072] In the normal mode, the control module 100 controls the first electromagnetic valve 44 to be opened according to the running state of the vehicle, ensuring that the exhaust system can normally exhaust, and the exhaust gas can smoothly flow from the particulate filter 2 to the muffler module 3. At the same time, the second electromagnetic valve 45 and the injector 43 are controlled to be closed, preventing foreign matter from entering the particulate filter 2, and avoiding unnecessary water injection during normal exhaust.

[0073] Ensure the normal exhaust function of the exhaust system, maintain the stable operation of the vehicle exhaust system. Protect the particulate filter 2 from external impurities, maintain its good filtering performance, help the vehicle exhaust emission meet the standard, and also ensure the normal working performance of the engine.

[0074] Further, in an optional embodiment, the trigger condition of the cleaning mode can also be engine running time trigger, which triggers the cleaning mode when the engine running time reaches a certain length. For example, when the cumulative running time of the engine reaches 500 hours, regardless of the vehicle mileage, the user is reminded to start the particulate filter 2 cleaning mode. Because the long-running engine may cause the accumulation of particulate matter in the particulate filter 2 to speed up, regular cleaning is needed to ensure its normal operation.

[0075] Further, the water storage assembly 41 includes a water storage tank and a filter unit;

[0076] The water storage tank is in communication with the muffler module 3 and the high-pressure water pump 42, respectively;

[0077] The filter unit is arranged between the water storage tank and the muffler module 3.

[0078] The filter unit is arranged between the water storage tank and the muffler module 3, which mainly functions to filter the condensed water generated by the muffler module 3. It can remove impurities such as dust, rust particles, and unburned carbon particles from the condensed water. Prevent impurities from entering the water storage tank and subsequent high-pressure water pump and injector components. Impurities may clog the pipeline, damage the water pump impeller, or affect the injection effect of the injector. Through filtration, a clean water source is provided, which is conducive to improving the cleaning effect, prolonging the service life of related components, and ensuring the stable operation of the cleaning system.

[0079] The water storage tank is used to store the condensed water filtered by the filter unit. It plays a buffering and storage role, ensuring that there is enough water supply when the particulate filter 2 needs to be cleaned. The capacity of the water storage tank can be designed according to actual needs to meet the cleaning needs in different vehicle use scenarios. For example, in some vehicles with long mileage and particulate filter 2 prone to clogging, a larger capacity water storage tank can ensure enough water for multiple cleanings. At the same time, the presence of the water storage tank makes the water supply of the cleaning system more stable and reliable.

[0080] Further, the water storage assembly 41 further includes a liquid level sensor and a third electromagnetic valve;

[0081] The liquid level sensor is arranged inside the water storage tank, and the third electromagnetic valve is arranged between the water storage tank and the muffler module 3, and the liquid level sensor and the third electromagnetic valve are electrically connected with the control module 100.

[0082] The liquid level sensor is installed inside the water storage tank, and its main function is to monitor the water level in the water storage tank in real time. By monitoring the water level, it can provide information about the amount of water in the water storage tank to the control module 100 of the vehicle.

[0083] The third electromagnetic valve is installed between the water storage tank and the muffler module 3. Its main function is to control the water path between the water storage tank and the muffler module 3. In some cases, such as when the water level in the water storage tank is too high, more condensed water can be prevented from entering the water storage tank by closing the third electromagnetic valve, or when the vehicle is jolted and the water level of the condensed water is too high; or when the water storage tank needs to be maintained or inspected, the third electromagnetic valve can be closed to isolate the water storage tank from the muffler module.

[0084] Specifically, the working principle of controlling the opening and closing of the third electromagnetic valve is to continuously monitor the water level in the water storage tank in real time through the liquid level sensor. It senses the change of water level through specific sensing technology such as float type, capacitive type or ultrasonic type, and converts the water level information into an electrical signal.

[0085] The liquid level sensor transmits the acquired water level electrical signal to the control module 100. The control module 100 has pre-set related water level thresholds inside to determine whether the water level in the water storage tank is within the normal range. These thresholds may include upper and lower thresholds, corresponding to different operation logics.

[0086] When the water level reaches or exceeds the upper threshold, the control module 100 determines that it is necessary to prevent condensed water from further entering the water storage tank, and at the same time closes the water path between the water storage tank and the muffler module 3 to prevent backflow. At this time, the control module 100 sends a closing instruction to the third electromagnetic valve.

[0087] After receiving the closing instruction from the control module 100, the electromagnetic mechanism inside the third electromagnetic valve drives the valve core to move, so that the valve is closed, thereby cutting off the water connection between the water storage tank and the muffler module 3. This prevents the possibility of condensed water flowing back from the water storage tank to the muffler module 3.

[0088] When the water level drops to the normal range, for example, below the upper threshold and above the lower threshold, the control module 100 may decide whether to reopen the third electromagnetic valve according to the actual situation such as the running state of the vehicle, the cleaning demand, etc. If it needs to be reopened, the control module 100 will send an opening instruction to the third electromagnetic valve to restore the valve to an open state, allowing condensed water to flow from the muffler module 3 into the water storage tank, but at the same time will continue to monitor the water level through the liquid level sensor to ensure that there is no risk of backflow again.

[0089] Further, in an alternative embodiment, the filtering unit comprises a coarse filter screen and a fine filter screen, the coarse filter screen has a larger pore size than the fine filter screen, and the coarse filter screen and the fine filter screen are arranged in sequence along the direction from the muffler module 3 to the water storage tank.

[0090] The coarse filter screen can be a metal filter screen made of stainless steel, with a relatively large mesh size, for example, a pore size of 0.5mm-1mm. Its main function is to intercept larger particulate impurities in the condensate water of the muffler, such as iron rust fragments, larger dust particles, etc.

[0091] The fine filter screen can be made of polyester fiber or polypropylene, etc. The mesh size is relatively small, and the pore size can be between 10μm-50μm. It can further filter out smaller impurities, such as tiny dust particles, some incompletely burned carbon particles, etc.

[0092] When the condensate water passes through the filter screen, the impurity particles, due to their particle size being larger than the mesh size, cannot pass through the filter screen and are intercepted on the surface of the filter screen, thereby ensuring that the condensate water collected into the water storage tank is free of impurities and that no pollution sources are brought in during cleaning.

[0093] Further, in an alternative embodiment, the filtering unit further comprises an activated carbon adsorption layer, which is arranged between the fine filter screen and the water storage tank.

[0094] The activated carbon adsorption layer is arranged between the fine filter screen and the water storage tank, and its main function is to further purify the condensate water filtered by the fine filter screen. It can adsorb organic pollutants, odor substances, and some dissolved impurities in the condensate water.

[0095] When the particulate filter 2 is cleaned, if the condensate water contains odor substances and organic pollutants, it may cause some pollution to the environment. The treatment of the activated carbon adsorption layer can reduce this pollution, and also avoid the generation of odor during the cleaning process, improving the comfort of the vehicle operating environment.

[0096] Further, in an alternative embodiment, the injector 43 is provided in multiple numbers, and each injector 43 is connected to different positions of the particulate filter 2, so that each injector 43 has a different coverage area for spraying inside the particulate filter 2.

[0097] The multiple injectors 43 are connected to different positions of the particulate filter 2, which allows the injectors 43 to spray inside the particulate filter 2 from multiple angles and positions. Each injector 43 has its specific coverage area, thereby achieving more comprehensive cleaning of the interior of the particulate filter 2.

[0098] Since the internal structure of the particle trap 2 is complex, a single injector can not cover all areas, resulting in incomplete cleaning in some parts. Multiple injectors can ensure that each corner of the particle trap 2 is cleaned, effectively removing blockages such as difficult-to-burn substances and ash after combustion, and improving the thoroughness and effectiveness of cleaning.

[0099] Further, in an optional embodiment, multiple injectors 43 are provided, each injector 43 being connected to the same position on the particle trap 2, and each injector 43 having a different angle towards the interior of the particle trap 2, so that the injection angles of the injectors 43 towards the interior of the particle trap 2 are different.

[0100] Multiple injectors 43 are provided at the same position on the particle trap 2, but have different injection angles, which function to inject and clean the interior of the particle trap 2 from different angles at the same position, to increase the cleaning coverage and cleaning intensity of specific areas in the interior of the particle trap 2.

[0101] For some local areas in the particle trap 2 with complex structure and easy to leave blockages, a single angle of injection can not be able to clean thoroughly. By multiple injectors with different angles, multi-angle flushing can be performed on these local areas, enhancing the cleaning effect of these parts and more effectively removing the remaining blockages.

[0102] The second aspect of the embodiment of the present application provides a vehicle, which comprises the vehicle exhaust system provided in the first aspect.

[0103] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle exhaust system, characterized by, The vehicle exhaust system comprises: a catalytic converter (1); a particle trap (2) in communication with the catalytic converter (1); a muffler module (3) in communication with the particle trap (2) for reducing exhaust noise; a cleaning module in communication with the particle trap (2) and the muffler module (3) respectively for collecting condensed water of the muffler module (3) to clean the particle trap (2); the cleaning module comprises a water storage assembly (41), a high-pressure water pump (42) and a sprayer (43); the water storage assembly (41) is in communication with the muffler module (3); the high-pressure water pump (42) is in communication with the water storage assembly (41) and the sprayer (43) respectively; an end of the sprayer (43) away from the high-pressure water pump (42) is in communication with the particle trap (2).

2. The vehicle exhaust system of claim 1, wherein, the cleaning module further comprises a first electromagnetic valve (44) and a second electromagnetic valve (45); the first electromagnetic valve (44) is arranged between the particle trap (2) and the muffler module (3) and in communication with the particle trap (2) and the muffler module (3) respectively; the second electromagnetic valve (45) is in communication with the particle trap (2) and an end of the second electromagnetic valve (45) is in communication with the outside.

3. The vehicle exhaust system of claim 2, wherein, The vehicle exhaust system further comprises a control module (100); the high-pressure water pump (42), the sprayer (43), the first electromagnetic valve (44) and the second electromagnetic valve (45) are electrically connected with the control module (100); in the cleaning mode, the control module (100) controls the first electromagnetic valve (44) to be closed, the second electromagnetic valve (45) to be opened and the high-pressure water pump (42) and the sprayer (43) to work so as to clean the particle trap (2); in the normal mode, the control module (100) controls the first electromagnetic valve (44) to be opened, the second electromagnetic valve (45) and the sprayer (43) to be closed so as to ensure the vehicle exhaust system to exhaust smoothly.

4. The vehicle exhaust system of claim 1, wherein, the water storage assembly (41) comprises a water storage tank and a filtering unit; the water storage tank is in communication with the muffler module (3) and the high-pressure water pump (42) respectively; the filtering unit is arranged between the water storage tank and the muffler module (3).

5. The vehicle exhaust system of claim 4, wherein, the water storage assembly (41) further comprises a liquid level sensor and a third electromagnetic valve; the liquid level sensor is arranged inside the water storage tank and the third electromagnetic valve is arranged between the water storage tank and the muffler module (3).

6. The vehicle exhaust system of claim 4, wherein, the filtering unit comprises a coarse filter screen and a fine filter screen; the aperture of the coarse filter screen is larger than that of the fine filter screen and the coarse filter screen and the fine filter screen are arranged in sequence along the direction from the muffler module (3) to the water storage tank.

7. The vehicle exhaust system of claim 6, wherein, the filtering unit further comprises an activated carbon adsorption layer arranged between the fine filter screen and the water storage tank.

8. The vehicle exhaust system of claim 1, wherein, The ejectors (43) are provided in plurality, each of the ejectors (43) being communicated at different positions of the particulate trap (2) so that the coverage area of each of the ejectors (43) for the injection inside the particulate trap (2) is different.

9. The vehicle exhaust system of claim 1, wherein, The ejectors (43) are provided in plurality, each of the ejectors (43) being communicated at the same position on the particulate trap (2), each of the ejectors (43) having a different angle towards the inside of the particulate trap (2) so that the angle of injection of the ejectors (43) inside the particulate trap (2) is different for each of the ejectors (43).

10. A vehicle characterized by comprising: The vehicle comprises a vehicle exhaust system according to any one of claims 1 to 9.

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