Exhaust cooling method

Abstract

The invention provides an exhaust cooling method which is applied to a vehicle and comprises the steps that whether exhaust back pressure meets the vehicle requirement or not is judged; and if yes, exhaust of the vehicle is controlled according to the exhaust control strategy. Therefore, by judging that the exhaust back pressure meets the requirements of the vehicle, the exhaust of the vehicle is controlled according to the exhaust control strategy, so that the exhaust temperature of the vehicle can be stably and effectively reduced, the energy consumption of vehicle exhaust cooling is reduced, and the efficiency of vehicle exhaust cooling is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle applications, specifically to an exhaust cooling method. Background Technology

[0002] During vehicle operation, exhaust gases are produced that need to be filtered through the exhaust system before being released into the atmosphere. These exhaust gases are high-temperature and pressurized, and the filtration process poses a risk of thermal damage to other components. Therefore, it is very important to manage the temperature of these exhaust gases.

[0003] Currently, the common method for cooling exhaust gas is to directly mix cold air into the exhaust gas to reduce its temperature. However, when the exhaust gas temperature is not high or the exhaust gas pressure is insufficient, the exhaust cooling system consumes a lot of energy, is inefficient, and cannot effectively and reasonably reduce the exhaust gas temperature. Summary of the Invention

[0004] This application provides an exhaust cooling method that meets vehicle requirements by using exhaust back pressure and controls vehicle exhaust according to an exhaust control strategy, enabling the vehicle to stably and effectively reduce exhaust temperature, thereby reducing the energy consumption of vehicle exhaust cooling and improving the efficiency of vehicle exhaust cooling.

[0005] In a first aspect, embodiments of this application provide an exhaust cooling method applied to a vehicle, the method comprising:

[0006] Determine whether the exhaust back pressure meets the vehicle's requirements; if it does, control the vehicle's exhaust according to the exhaust control strategy.

[0007] In one possible embodiment, controlling the vehicle's exhaust according to the exhaust control strategy includes: collecting the airflow temperature at the exhaust tailpipe opening; if the airflow temperature at the exhaust tailpipe opening is greater than or equal to a first temperature, then starting the air compressor to reduce the exhaust temperature.

[0008] In one possible embodiment, starting the air compressor to reduce the exhaust temperature includes: starting the air compressor to discharge a cold air stream, and mixing the cold air stream with the exhaust air stream to reduce the exhaust temperature.

[0009] In one possible embodiment, starting the air compressor to reduce the exhaust temperature includes: controlling the air compressor to operate at a power corresponding to a temperature range, wherein the minimum value of the temperature range is greater than or equal to the first temperature, and the power is positively correlated with the temperature level corresponding to the temperature range.

[0010] In one possible embodiment, controlling the air compressor to operate at a power corresponding to a temperature range includes: if the temperature range is greater than or equal to a first preset temperature and less than a second preset temperature, then controlling the air compressor to operate at a power of a first air volume; if the temperature range is greater than or equal to the second preset temperature and less than a third preset temperature, then controlling the air compressor to operate at a power of a second air volume, where the second air volume is greater than the first air volume; if the temperature range is greater than or equal to the third preset temperature, then starting the air compressor to operate at a power of a third air volume, where the third air volume is greater than the second air volume.

[0011] In one possible embodiment, after starting the air compressor to reduce the exhaust temperature, the method further includes: if the reduced exhaust temperature is greater than the first temperature, detecting the operating state of the air compressor, the operating state including normal operating state and abnormal operating state; if it is determined that the air compressor is in normal operating state, controlling the air compressor to operate at a higher power; if it is determined that the air compressor is in abnormal operating state, indicating a risk of high exhaust gas temperature.

[0012] In one possible embodiment, detecting the operating state of the air compressor includes: acquiring the reduced exhaust temperature at the exhaust tailpipe port; determining whether the difference between the airflow temperature and the reduced exhaust temperature at the exhaust tailpipe port is less than a preset difference; if the difference is less than the preset difference, determining that the air compressor is in an abnormal operating state; if the difference is not less than the preset difference, determining that the air compressor is in a normal operating state.

[0013] In one possible embodiment, detecting the operating status of the air compressor includes: acquiring status information of the air compressor and determining the operating status of the air compressor based on the status information.

[0014] In one possible embodiment, controlling the vehicle's exhaust according to the exhaust control strategy further includes: shutting down the air compressor if the airflow temperature at the exhaust tailpipe port is lower than the first temperature.

[0015] In one possible embodiment, before determining whether the exhaust back pressure meets the vehicle requirements, the method further includes: acquiring the exhaust back pressure via a pressure sensor.

[0016] In one possible embodiment, determining whether the exhaust back pressure meets the vehicle's requirements includes: if the exhaust back pressure is within a first preset air pressure range, determining that the exhaust back pressure meets the vehicle's requirements; if the exhaust back pressure is outside the first preset air pressure range, then turning off or not turning on the air compressor.

[0017] In one possible embodiment, the acquisition of the airflow temperature at the exhaust tailpipe inlet includes: acquiring at least two valid airflow measurement temperatures using at least two temperature sensors; and determining the airflow temperature at the exhaust tailpipe inlet based on the average of the at least two valid airflow measurement temperatures.

[0018] In one possible embodiment, acquiring at least two airflow measurement temperatures through at least two temperature sensors includes: acquiring multiple airflow measurement temperatures through the temperature sensors; acquiring the at least two valid airflow measurement temperatures from the multiple airflow measurement temperatures, wherein the difference between any two valid target airflow measurement temperatures among the at least two valid airflow measurement temperatures is less than a preset value.

[0019] In one possible embodiment, before determining whether the exhaust back pressure meets the vehicle's requirements, the method further includes: determining that the vehicle is in hybrid mode.

[0020] Secondly, embodiments of this application provide an electronic device including a controller, a memory, and one or more programs, the one or more programs being stored in the memory and configured to be executed by the controller, the one or more programs including instructions for performing the steps in the method described above.

[0021] Thirdly, embodiments of this application provide a vehicle, the vehicle including electronic equipment as described in the second aspect and at least one exhaust system component, the at least one exhaust system component being a component through which exhaust gas flows.

[0022] Specifically, the at least one exhaust system component includes an intake device, an air compressor, a vehicle muffler, and an exhaust tailpipe. The intake device, the air compressor, the vehicle muffler, and the exhaust tailpipe are connected in sequence. The intake device is used to filter cold air. The air compressor is used to compress the cold air and input the cold air flow into the muffler device. The vehicle muffler is used to mix the cold air flow and the exhaust air flow to form exhaust. The exhaust tailpipe is used to discharge the exhaust.

[0023] Specifically, the air intake device is connected to the first end of the air compressor through a first pipe, the second end of the air compressor is connected to the first end of the vehicle muffler through a second pipe, and the second section of the vehicle muffler is connected to the exhaust tailpipe.

[0024] Specifically, the vehicle muffler includes a vehicle exhaust muffler, a cold air mixing chamber, and a drain hole. The second end of the air compressor is connected to the first end of the cold air mixing chamber through the second pipe. The second end of the cold air mixing chamber is connected to the vehicle exhaust muffler through the third pipe. The third end of the cold air mixing chamber is connected to the drain hole.

[0025] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the steps of the method described above.

[0026] As can be seen in this example, the vehicle determines whether the exhaust back pressure meets its requirements; if so, it controls the vehicle's exhaust according to the exhaust control strategy. In this way, by determining whether the exhaust back pressure meets the vehicle's requirements and controlling the exhaust according to the exhaust control strategy, the vehicle can stably and effectively reduce the exhaust temperature, thereby reducing the energy consumption of exhaust cooling and improving the efficiency of exhaust cooling. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the composition of a vehicle provided in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram illustrating the composition of an electronic device provided in an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the composition of an exhaust system component provided in an embodiment of this application;

[0031] Figure 4 This is a schematic flowchart of an exhaust cooling method provided in an embodiment of this application;

[0032] Figure 5 This is a schematic flowchart of an exhaust cooling method for hybrid vehicles provided in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the working process of an air compressor provided in an embodiment of this application. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0035] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] In the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone; A and B exist simultaneously; B exists alone. Among them, A and B can be singular or plural.

[0038] In this embodiment, the symbol " / " can indicate that the preceding and following objects are in an "or" relationship. Alternatively, the symbol " / " can also represent a division sign, i.e., performing a division operation. For example, A / B can mean A divided by B.

[0039] In this embodiment of the application, the symbol “≤” can indicate that the related objects are “less than or equal to”. For example, A≤B can mean that A is less than or equal to B.

[0040] In this embodiment of the application, the symbol "<" can indicate that the related objects are in a "less than" relationship. For example, A < B can mean that A is less than B.

[0041] In this embodiment of the application, the symbol “≥” can indicate that the relationship between the preceding and following parts is a relationship of “greater than or equal to”. For example, A≥B can mean that A is greater than or equal to B.

[0042] In the embodiments of this application, "equal to" can be used with "greater than" and is applicable to technical solutions used when "greater than" is used; it can also be used with "less than" and is applicable to technical solutions used when "less than" is used. When "equal to" is used with "greater than", it is not used with "less than"; when "equal to" is used with "less than", it is not used with "greater than".

[0043] Currently, the treatment of exhaust gas involves introducing cold air to mix with the exhaust gas. Although this can reduce the temperature of the exhaust gas, the exhaust cooling system has high energy consumption, low efficiency, and low performance.

[0044] To address the aforementioned problems, this application provides an exhaust cooling method, and the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0045] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the composition of a vehicle provided in an embodiment of this application. For example... Figure 1 As shown, vehicle 10 may include electronic equipment 20 and exhaust system components 30. The electronic equipment is communicatively connected to the exhaust system components and is used to control the operation of the exhaust system components and receive data from the exhaust system components. The exhaust system components may be parts through which exhaust airflow passes. Exhaust system components 30 may include an intake device 301, an air compressor 302, a vehicle muffler 303, and an exhaust tailpipe 304. The intake device 301, the air compressor 302, the vehicle muffler 303, and the exhaust tailpipe 304 are connected in sequence. The intake device is used to filter cold air, the air compressor is used to compress the cold air and input the cold air flow into the muffler device, the vehicle muffler is used to mix the cold air flow and the exhaust air flow to form exhaust, and the exhaust tailpipe is used to discharge the exhaust. Specifically, during vehicle operation, the engine is running, and combustion produces exhaust gases. These gases, after filtration, are released into the atmosphere. All components through which the exhaust gas flows from the engine's exhaust manifold to the exhaust tailpipe before finally being released into the atmosphere can be collectively referred to as the exhaust system components. An air compressor introduces cool air into the exhaust system components, which combines with the exhaust gas, thus lowering the temperature of the emitted gas. It's important to note that the exhaust gas emitted by the engine is high-temperature gas, and its specific temperature depends on the engine displacement and whether it has a turbocharger. For example, in engines with a displacement of 1.5 liters (L) or larger operating at full power, the exhaust temperature at the exhaust manifold outlet is generally greater than 700 degrees Celsius (°C). After being cooled by the exhaust cooling system, the gas temperature at the exhaust tailpipe outlet can still be very high. In summary, the exhaust gas undergoes a temperature reduction and pressure decrease as it passes through the entire exhaust system components before being released into the atmosphere.

[0046] Please see Figure 2 , Figure 2 This is a schematic diagram illustrating the composition of an electronic device provided in an embodiment of this application. For example... Figure 2As shown, the electronic device 20 may include one or more components such as a controller 201, a memory 202, a communication interface 203, and one or more programs 204. The one or more programs 204 are stored in the memory 202 and configured to be executed by the controller 201. The one or more programs 204 include steps for performing any of the steps described in the following schemes. In a specific implementation, the controller 201 is used to perform any step executed by the electronic device as described in the following method embodiments, and when performing data transmission such as sending, it may selectively call the communication interface 203 to complete the corresponding operation. The controller 201 may specifically be a server, a server cluster consisting of several servers, or a cloud computing service center. The controller 201 may include one or more processing cores. The controller 201 connects various parts within the controller 201 using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 202, and by calling data stored in the memory 202. Optionally, the controller 201 can be implemented using at least one hardware form selected from Digital Signal Processing (DSP), Field Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The controller 201 can integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the controller 201 and can be implemented using a separate communication chip. The memory 202 may include Random Access Memory (RAM) or Read-Only Memory (ROM). The memory 202 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 202 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch control, sound playback, image playback, etc.), and instructions for implementing the various method embodiments described above. The data storage area may also store data created by the controller 201 during use. It is understood that the controller 201 may include more or fewer structural elements than those shown in the above block diagram, and this is not limited thereto.

[0047] Please refer to Figure 3 , Figure 3 This is a schematic diagram illustrating the composition of an exhaust system component provided in an embodiment of this application. For example... Figure 3 As shown, the exhaust system component 30 may include an intake device 301, an air compressor 302, a vehicle muffler 303, and an exhaust tailpipe 304. The intake device 301 is connected to a first end of the air compressor 302 via a first pipe. The second end of the air compressor 302 is connected to the first end of the vehicle muffler 303 via a second pipe. The second end of the vehicle muffler 303 is connected to the exhaust tailpipe 304. The vehicle muffler 303 includes a vehicle exhaust muffler 3031, a cold air mixing chamber 3032, and a drain hole 3033. The second end of the air compressor 302 is connected to the first end of the cold air mixing chamber 3032 via the second pipe. The second end of the cold air mixing chamber 3032 is connected to the vehicle exhaust muffler 3031. The third end of the cold air mixing chamber 3032 is connected to the drain hole 3033.

[0048] An air compressor can represent an air source, used to supply air; a blower has a similar function. Air compressor 302 can be used to pressurize low-temperature gas in the air and inject it into the vehicle's muffler 303. The air compressor has multiple operating modes to meet the vehicle's exhaust gas mixing requirements. The airflow of the air compressor is controllable and can be divided into multiple intake schemes. Specifically, each mode of air compressor consumes different amounts of electricity; the maximum power operation consumes the most electricity, and the minimum power operation consumes the least.

[0049] Since the vehicle uses an air compressor to compress air and pump it into the cold air mixing chamber 3032, and the air contains a lot of impurities, on the one hand, in order to improve the performance of the air compressor and avoid drawing impurities from the air into the air compressor, causing damage to the air compressor, and on the other hand, to avoid drawing impurities into the cold air mixing chamber 3032, causing the chamber volume to decrease or blocking the water leakage hole 3033, and causing flammable materials to be drawn into the vehicle exhaust muffler and the cold air mixing chamber 3032, which is a kind of danger, the air intake device 301 can be a cold air filter device.

[0050] The vehicle muffler 303 can be divided into multiple chambers. In this example, two chambers are mainly described, through which the engine exhaust airflow flows from... Figure 3 The air enters the vehicle's exhaust muffler 3031 at position B, and after circulation, it enters the cold air mixing chamber 3032. It then enters the air compressor 302 through position A and is fully mixed with the low-temperature gas converted by the air compressor 302. The mixed gas is then discharged from the exhaust tailpipe 304.

[0051] A white mist phenomenon may occur at the outlet of exhaust tailpipe 304. This is because the engine exhaust gas contains water vapor. In winter, when the outdoor temperature is low, the vehicle exhaust gas containing high-temperature water vapor will produce a white mist phenomenon when it is discharged from the exhaust tailpipe. This white mist phenomenon is caused by the pre-cooling and liquefaction of water vapor.

[0052] It should be noted that the structure of the air intake device described in this embodiment is exemplary and not constrained, and the structure of the air compressor described in this embodiment is also exemplary and not constrained. Similarly, the structure of the exhaust muffler described in this embodiment is exemplary and not constrained.

[0053] It should be noted that the exhaust cooling method described below is applicable to exhaust systems integrated into the front or rear compartment of a vehicle, as well as to equipment with non-integrated exhaust systems.

[0054] Please refer to Figure 4 , Figure 4 This is a schematic flowchart of an exhaust cooling method provided in an embodiment of this application. Figure 4 As shown, the method includes the following steps:

[0055] S401 determines whether the exhaust back pressure meets the vehicle's requirements.

[0056] Among them, exhaust back pressure refers to the resistance pressure of engine exhaust. The magnitude of exhaust back pressure directly affects the engine's power and noise level. If the exhaust back pressure is too high, the engine exhaust will not be smooth, resulting in increased intake air loss, decreased engine combustion efficiency, reduced power output, and decreased fuel economy. If the exhaust back pressure is too low, it will lead to increased development costs of the exhaust cooling system and deterioration of product quality.

[0057] Among these, vehicle demand can specifically refer to vehicle exhaust demand, which is related to vehicle model, driving habits, and vehicle exhaust system.

[0058] Specifically, determining whether the exhaust back pressure meets the vehicle's requirements includes: if the exhaust back pressure is within a first preset air pressure range, determining that the exhaust back pressure meets the vehicle's requirements; if the exhaust back pressure is outside the first preset air pressure range, then turning off or not turning on the air compressor.

[0059] The first air pressure preset range is related to the vehicle's exhaust demand. This first air pressure preset range can improve the vehicle's exhaust economy, reduce exhaust cooling losses, and improve exhaust cooling efficiency. In particular, the first air pressure preset range can be a specific numerical range, for example, the first air pressure preset range can be from 10 kPa to 13.8 kPa.

[0060] S402, if satisfied, then control the vehicle's exhaust according to the exhaust control strategy.

[0061] The exhaust control strategy can be a strategy designed by the user based on experience, or a model strategy obtained based on deep learning or other methods.

[0062] As can be seen, in this example, by meeting the vehicle's needs through exhaust back pressure and controlling the vehicle's exhaust according to the exhaust control strategy, the vehicle can stably and effectively reduce the exhaust temperature, thereby reducing the energy consumption of vehicle exhaust cooling and improving the efficiency of vehicle exhaust cooling.

[0063] In one possible embodiment, controlling the vehicle's exhaust according to the exhaust control strategy includes: collecting the airflow temperature at the exhaust tailpipe opening; if the airflow temperature at the exhaust tailpipe opening is greater than or equal to a first temperature, then starting the air compressor to reduce the exhaust temperature.

[0064] The first temperature is related to the vehicle's heat dissipation requirements, which can include reducing white fog and effectively cooling the exhaust airflow. In particular, the vehicle's heat dissipation requirements can be a specific numerical value. For example, if the airflow temperature at the exhaust tailpipe is not higher than 150°C, then the first temperature can be 150°C.

[0065] Specifically, the process of starting the air compressor to reduce the exhaust temperature includes: starting the air compressor to discharge cold air flow, and mixing the cold air flow with the exhaust air flow to reduce the exhaust temperature.

[0066] Among them, such as Figure 3 As shown, when the air compressor is started, it can convert the filtered air into a cold air stream, which is then discharged into the cold air mixing chamber. In the cold air mixing chamber, the air stream mixes with the exhaust air stream, thereby reducing the temperature of the exhaust air stream.

[0067] In addition, controlling the vehicle's exhaust according to the exhaust control strategy further includes: if the airflow temperature at the exhaust tailpipe port is lower than the first temperature, then shutting down the air compressor.

[0068] When the airflow temperature at the exhaust tailpipe opening is lower than the first temperature, it means that the temperature at the exhaust tailpipe opening will not affect the vehicle, and no cooling treatment is required; the exhaust can be discharged directly.

[0069] As can be seen, in this example, starting or stopping the air compressor based on the relationship between the airflow temperature at the exhaust tailpipe and a first temperature enables the vehicle to stably and effectively reduce the exhaust temperature, thereby reducing the energy consumption of vehicle exhaust cooling and improving the efficiency of vehicle exhaust cooling. In one possible embodiment, acquiring the airflow temperature at the exhaust tailpipe includes: obtaining at least two effective airflow measurement temperatures through at least two temperature sensors; and determining the airflow temperature at the exhaust tailpipe based on the average of the at least two effective airflow measurement temperatures.

[0070] To avoid erroneous data transmission from the temperature sensor at the exhaust tailpipe inlet, at least two temperature sensors can be installed at the exhaust tailpipe inlet. The signals of these temperature sensors need to be calibrated and confirmed, and the error range needs to be calibrated.

[0071] Specifically, acquiring at least two airflow measurement temperatures through at least two temperature sensors includes: acquiring multiple airflow measurement temperatures through the temperature sensors; and acquiring the at least two valid airflow measurement temperatures from the multiple airflow measurement temperatures.

[0072] Wherein, the difference between any two effective target airflow measurement temperatures among the at least two effective airflow measurement temperatures is less than a preset value.

[0073] The temperature sensor can be installed at or near the exhaust tailpipe. This temperature sensor can be used to read and provide feedback on the temperature of the exhaust gas flow at the exhaust tailpipe opening in real time.

[0074] Since the temperature sensors are installed in different locations, the temperatures collected by each temperature sensor may be different. In this case, it is necessary to filter the temperatures collected by the temperature sensors. The filtering method can be that the difference between the temperatures collected by two temperature sensors is less than a preset value. This preset value can be set by the user or set based on historical data. When the temperatures collected by two temperature sensors are less than the preset value, it means that the temperatures collected by the two temperature sensors can more accurately represent the airflow temperature at the exhaust tailpipe, and the temperatures collected by the two sensors are taken as the effective airflow measurement temperatures.

[0075] For example, the airflow temperature at the exhaust tailpipe can be the average of the effective airflow measurement temperature, which can eliminate a certain temperature deviation and improve the accuracy of temperature acquisition.

[0076] It should be noted that the measurement accuracy of this temperature sensor needs to be clearly defined, and a deviation of ±5℃ is permissible. In this example, the specific accuracy range of the temperature sensor is not constrained. Furthermore, the accuracy and range of the temperature sensor described in this embodiment are merely exemplary and not intended to be limiting.

[0077] It is evident that by collecting the temperature at the exhaust tailpipe inlet using at least two temperature sensors, the inaccurate airflow temperature at the exhaust tailpipe inlet can be prevented from occurring when only one temperature sensor fails. Furthermore, determining the airflow temperature at the exhaust tailpipe inlet by using the average of the effective airflow temperature measurements can reduce the impact of random errors and more accurately represent the airflow temperature at the exhaust tailpipe inlet.

[0078] In one possible embodiment, before determining whether the exhaust back pressure meets the vehicle requirements, the method further includes: acquiring the exhaust back pressure via a pressure sensor.

[0079] The pressure sensor can be installed at the exhaust manifold and can collect data in real time as the exhaust airflow passes through it.

[0080] Specifically, determining whether the exhaust back pressure meets the vehicle's requirements includes: if the exhaust back pressure is within a first preset air pressure range, determining that the exhaust back pressure meets the vehicle's requirements; if the exhaust back pressure is outside the first preset air pressure range, then turning off or not turning on the air compressor.

[0081] Specifically, when the exhaust back pressure collected by the pressure sensor is within the first preset air pressure range, it indicates that the exhaust airflow will affect the vehicle. In this case, the air compressor needs to be turned on to draw in air to cool the exhaust airflow. When the exhaust back pressure collected by the pressure sensor is outside the first preset air pressure range, it indicates that the exhaust airflow will not affect the vehicle and can be discharged directly. In this case, the air compressor may be on and needs to be turned off, or the air compressor may be off and should not be turned on.

[0082] It is evident that pressure sensors can accurately obtain exhaust back pressure, which helps determine whether the exhaust back pressure meets the vehicle's requirements, enabling the vehicle to effectively handle exhaust airflow, reducing the energy consumption of vehicle exhaust cooling, and improving the efficiency of vehicle exhaust cooling.

[0083] In one possible embodiment, before determining whether the exhaust back pressure meets the vehicle's requirements, the method further includes: determining that the vehicle is in hybrid mode.

[0084] Among them, the vehicle can be a vehicle that can burn fuel, for example, the vehicle can be a multi-fuel vehicle such as gasoline or diesel, and the vehicle can also be a hybrid vehicle.

[0085] When the vehicle is a hybrid vehicle, the driving modes include pure electric mode and hybrid mode. When the vehicle is in pure electric mode, the vehicle does not produce exhaust gas, and the air compressor is in the off state. When the vehicle is in hybrid mode, the exhaust back pressure needs to be judged, and the air compressor is controlled according to whether the exhaust back pressure meets the vehicle's needs.

[0086] Please refer to Figure 5 , Figure 5 This is a schematic flowchart of an exhaust cooling method for hybrid vehicles provided in an embodiment of this application. Figure 5 As shown, firstly, the vehicle starts, indicating that it needs to be in a working state. Then, it is determined whether the vehicle's driving mode is hybrid mode. If the vehicle's driving mode is not hybrid mode, it means that the vehicle's driving mode is pure electric drive mode, so the air compressor is turned off, and there is no need to inject low-temperature gas into the muffler mixing chamber. If the vehicle's driving mode is hybrid mode, the exhaust pressure sensor determines whether the exhaust back pressure meets the vehicle's requirements. If the exhaust back pressure does not meet the vehicle's requirements, the air compressor is turned off, and then the exhaust gas flows out of the vehicle. If the exhaust back pressure meets the vehicle's requirements, the temperature sensor signal is collected. This temperature sensor signal can be used to indicate whether the airflow temperature at the exhaust tailpipe is greater than temperature A. If the airflow temperature at the exhaust tailpipe is less than temperature A, it means that the temperature at the exhaust tailpipe is not high, and no cooling treatment is needed, so the air compressor is turned off, and then the exhaust gas flows out of the vehicle. If the airflow temperature at the exhaust tailpipe is greater than or equal to temperature A, it means that the temperature at the exhaust tailpipe is too high, and cooling treatment is needed. The air compressor needs to operate within its operating range, so the air compressor is turned on, and then the cold airflow mixes with the exhaust airflow. Finally, the mixed gas flows out of the vehicle. It is important to note that insufficient exhaust back pressure can occur when the exhaust back pressure is too high. In low-temperature environments, water can be generated in the exhaust cooling system. If too much water is generated and cannot be discharged from the exhaust muffler in time, and the mixing chamber of the exhaust muffler has limited space, the exhaust back pressure during engine startup will be too high, failing to meet the engine's economical operating requirements. In this case, the air compressor should be shut off, and the air compressor should be prohibited from introducing low-temperature gas into the mixing chamber. This is because the low-temperature gas will liquefy the water vapor in the high-temperature exhaust gas during the mixing process, further confining the already limited space and thus affecting the engine's exhaust back pressure.

[0087] It is evident that the exhaust cooling method of this application is applicable to various fuel types, including automobiles and diesel vehicles, and has a wide range of applicability.

[0088] In one possible embodiment, starting the air compressor to reduce the exhaust temperature includes controlling the air compressor to operate at a power level corresponding to the temperature range.

[0089] Wherein, the minimum value of the temperature range is greater than or equal to the first temperature, and the power is positively correlated with the temperature level corresponding to the temperature range.

[0090] Specifically, controlling the air compressor to operate at a power level corresponding to a temperature range includes: if the temperature range is greater than or equal to a first preset temperature and less than a second preset temperature, then controlling the air compressor to operate at a power level of a first air volume; if the temperature range is greater than or equal to the second preset temperature and less than a third preset temperature, then controlling the air compressor to operate at a power level of a second air volume, where the second air volume is greater than the first air volume; if the temperature range is greater than or equal to the third preset temperature, then starting the air compressor to operate at a power level of a third air volume, where the third air volume is greater than the second air volume.

[0091] The first, second, and third preset temperatures can be user-defined or set based on historical data. For example, the first preset temperature can be 150℃, the second preset temperature can be 250℃, and the third preset temperature can be 350℃; or the first preset temperature can be 180℃, the second preset temperature can be 280℃, and the third preset temperature can be 400℃.

[0092] Please refer to the following: Figure 6 , Figure 6 This is a schematic diagram of the working process of an air compressor provided in an embodiment of this application. Figure 6 As shown, firstly, the vehicle starts, indicating that it needs to be in working condition; the vehicle is in hybrid drive mode; then, the pressure sensor shows that the vehicle's requirements are met; then, the temperature sensor signal is collected, which reflects the temperature T at the exhaust tailpipe inlet. If 150≤T<250, it means that the temperature at the exhaust tailpipe inlet needs to be lowered, so the air compressor operates at low airflow, and the corresponding operating power of the air compressor is low power; if 250≤T<350, it means that the air compressor operating at low airflow cannot effectively reduce the temperature at the exhaust tailpipe inlet, so the air compressor operates at medium airflow, and the corresponding operating power of the air compressor is medium power; if 350≤T, it means that the air compressor operating at medium airflow cannot effectively reduce the temperature at the exhaust tailpipe inlet, so the air compressor operates at high airflow, and the corresponding operating power of the air compressor is high power.

[0093] As can be seen in this example, by controlling the air compressor to operate according to the corresponding power by the specific value of the exhaust temperature at the exhaust tailpipe, the working mode of the air compressor can be divided into zones, which can effectively reduce the energy consumption of the air compressor, extend the service life of the air compressor, and reduce the user's operating costs.

[0094] In one possible embodiment, after starting the air compressor to reduce the exhaust temperature, the method further includes: if the reduced exhaust temperature is greater than the first temperature, detecting the operating state of the air compressor, the operating state including normal operating state and abnormal operating state; if it is determined that the air compressor is in normal operating state, controlling the air compressor to operate at a higher power; if it is determined that the air compressor is in abnormal operating state, indicating a risk of high exhaust gas temperature.

[0095] The reduced exhaust temperature can be the temperature at the exhaust tailpipe port collected by the temperature sensor after the air compressor has been running for a period of time. If the reduced exhaust temperature is greater than the first temperature, it means that the exhaust temperature has not dropped to a value that meets the vehicle's requirements. The vehicle's exhaust cooling effect may be weak or the vehicle's exhaust cooling treatment may have failed, and the working status of the air compressor needs to be checked.

[0096] When the air compressor is in normal working condition, it indicates that the cooling effect of the air compressor is weak and the air compressor needs to be controlled to work at a higher power. When the air compressor is in abnormal working condition, it indicates that the air compressor may have been damaged or that the air compressor is not connected to the power supply. At this time, a high exhaust gas temperature signal can be sent to the driver to remind the driver of the risk of high exhaust gas temperature, so that the driver can adjust the driving mode in time.

[0097] Specifically, detecting the working status of the air compressor includes: acquiring the status information of the air compressor and determining the working status of the air compressor based on the status information.

[0098] The status information can be represented by Boolean values. For example, a status value of 0 indicates that the air compressor is in an abnormal operating state, while a status value of 1 indicates that the air compressor is in a normal operating state. Status information can also be represented by the air compressor's voltage. For example, if the air compressor voltage is too low, it indicates that the air compressor may be damaged and unable to operate; if the air compressor voltage is too high, it indicates that the air compressor may be malfunctioning. Specifically, detecting the operating status of the air compressor includes: acquiring the reduced exhaust temperature at the exhaust tailpipe port; determining whether the difference between the airflow temperature and the reduced exhaust temperature at the exhaust tailpipe port is less than a preset difference; if the difference is less than the preset difference, the air compressor is determined to be in an abnormal operating state; if the difference is not less than the preset difference, the air compressor is determined to be in a normal operating state.

[0099] The difference between the airflow temperature and the reduced exhaust temperature at the exhaust tailpipe reflects the temperature drop of the vehicle's exhaust gas. The preset difference can be a value customized by the user based on cooling requirements. This value can be related to the air compressor's own cooling capacity. For example, when the air compressor has a strong cooling capacity, the preset difference can be 20℃; when the air compressor has a strong cooling capacity, the preset difference can be 250℃. If the difference between the airflow temperature and the reduced exhaust temperature at the exhaust tailpipe is less than the preset difference, it indicates that the air compressor is not performing properly and has a problem; its operating state is abnormal. If the difference between the airflow temperature and the reduced exhaust temperature at the exhaust tailpipe is not less than the preset difference, it indicates that the air compressor is performing properly and its operating state is normal.

[0100] In addition, the difference between the first temperature and the reduced exhaust temperature from the exhaust tailpipe can be compared with a preset value. If the difference between the first temperature and the reduced exhaust temperature from the exhaust tailpipe is less than the preset value, it indicates that the engine exhaust temperature has not dropped to the required level. In this case, the air compressor's operating status needs to be checked. An abnormal operating status of the air compressor may be due to damage to the air compressor or the air compressor not being connected to the power supply. At this time, a high exhaust gas temperature signal can be sent to the driver to alert the driver of the risk of high exhaust gas temperature, so that the driver can adjust the driving mode in time.

[0101] As can be seen in this example, the temperature of the exhaust tailpipe can be collected again to detect the airflow temperature, which can control the temperature range of the air-fuel mixture and effectively and stably reduce the temperature of the exhaust airflow before it exits the tailpipe, thereby reducing the energy consumption of vehicle exhaust cooling and improving the efficiency of vehicle exhaust cooling.

[0102] like Figure 6 As shown, after the air compressor starts running, the temperature at the exhaust tailpipe is checked to see if it meets the standard. If the temperature at the exhaust tailpipe meets the standard, the mixed gas flows out of the vehicle. If the temperature at the exhaust tailpipe does not meet the standard, it is determined whether the air compressor is working normally. If the air compressor is working normally, it means that the temperature reduction during the period after the air compressor starts running has not reached the standard. In this case, the temperature sensor signal can be collected again, the air compressor can be restarted, and the operating power of the air compressor can be adjusted. For example, if the first exhaust temperature is high and the air compressor is running at a low air volume, the second exhaust temperature can be close to the first exhaust temperature. Under the condition that the air compressor is working normally, the working efficiency of the air compressor can be improved, further increasing the air volume of low-temperature gas entering the mixing chamber. If the air compressor is not working normally, it can alert the driver of the risk of high exhaust temperature, allowing the driver to adjust the driving mode in time. The exhaust gas flowing out of the vehicle indicates that the engine exhaust gas has not mixed with the cold air.

[0103] As can be seen in this example, the working status of the air compressor can be self-checked. When the air compressor is in normal condition, the operating power of the air compressor can be adjusted to effectively reduce the temperature of the exhaust airflow. The temperature of the exhaust airflow can also be reduced in advance, which can effectively reduce the white fog phenomenon formed when the exhaust airflow flows out of the exhaust tailpipe in winter.

[0104] It should be noted that the working mode and temperature relationship of the air compressor in this application are only examples. The specific working mode can be calibrated according to the needs of the vehicle and is not limited in this application. The working mode of the air compressor in this application can be divided into multiple types, which are intended to save the energy required for the air compressor to work and increase the working time of the air compressor.

[0105] The above primarily describes the solutions of the embodiments of this application from the perspective of the method execution process. It is understood that, in order to achieve the above functions, the vehicle includes the corresponding hardware structures and software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments provided herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0106] This application embodiment can divide the electronic device into functional units according to the above method example. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional unit. It should be noted that the unit division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0107] This application also provides a computer-readable storage medium storing a computer program that causes a computer to perform some or all of the steps of any of the methods described in the above method embodiments.

[0108] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0109] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0110] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0111] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0112] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0113] If the integrated units described above are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0114] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

[0115] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can easily conceive of variations or substitutions without departing from the spirit and scope of this application, and can make various alterations and modifications, including combinations of the different functions and implementation steps described above, as well as software and hardware implementation methods, all of which are within the protection scope of this application.

Claims

1. An exhaust cooling method, applied to a vehicle, characterized in that, The method includes: Determine whether the exhaust back pressure meets the vehicle's requirements; if it does, control the vehicle's exhaust according to the exhaust control strategy.

2. The exhaust cooling method according to claim 1, characterized in that, The method of controlling the vehicle's exhaust according to the exhaust control strategy includes: collecting the airflow temperature at the exhaust tailpipe opening; if the airflow temperature at the exhaust tailpipe opening is greater than or equal to a first temperature, then starting the air compressor to reduce the exhaust temperature.

3. The exhaust cooling method according to claim 2, characterized in that, The process of starting the air compressor to reduce the exhaust temperature includes: starting the air compressor to discharge cold air flow, and mixing the cold air flow with the exhaust air flow to reduce the exhaust temperature.

4. The exhaust cooling method according to claim 3, characterized in that, The starting of the air compressor reduces the exhaust temperature, including: The air compressor is controlled to operate at a power level corresponding to a temperature range, wherein the minimum value of the temperature range is greater than or equal to the first temperature, and the power level is positively correlated with the temperature level corresponding to the temperature range.

5. The exhaust cooling method according to claim 4, characterized in that, The control of the air compressor to operate at a power level corresponding to the temperature range includes: If the temperature range is greater than or equal to the first preset temperature and less than the second preset temperature, then the air compressor is controlled to operate at the power of the first air volume; If the temperature range is greater than or equal to the second preset temperature and less than the third preset temperature, then the air compressor is controlled to operate at the power of the second air volume, where the second air volume is greater than the first air volume. If the temperature range is greater than or equal to the third preset temperature, then the air compressor is started to operate at the power of the third air volume, which is greater than the second air volume.

6. The exhaust cooling method according to any one of claims 2-5, characterized in that, After the air compressor is started to reduce the exhaust temperature, the method further includes: If the reduced exhaust temperature is greater than the first temperature, the working status of the air compressor is detected, including normal working status and abnormal working status. If it is determined that the air compressor is in normal working condition, then the air compressor is controlled to operate at a higher power. If the air compressor is determined to be in an abnormal operating state, a risk of high exhaust gas temperature will be indicated.

7. The exhaust cooling method according to claim 6, characterized in that, The detection of the working status of the air compressor includes: Obtain the reduced exhaust temperature at the exhaust tailpipe opening; Determine whether the difference between the airflow temperature and the reduced exhaust temperature at the exhaust tailpipe port is less than a preset difference. If the difference is less than the preset difference, then the working state of the air compressor is determined to be an abnormal working state; If the difference is not less than the preset difference, then the working state of the air compressor is determined to be the normal working state.

8. The exhaust cooling method according to claim 6, characterized in that, The detection of the working status of the air compressor includes: Obtain the status information of the air compressor, and determine the working status of the air compressor based on the status information.

9. The exhaust cooling method according to claim 2, characterized in that, The method of controlling the vehicle's exhaust according to the exhaust control strategy further includes: if the airflow temperature at the exhaust tailpipe port is lower than the first temperature, then shutting down the air compressor.

10. The exhaust cooling method according to claim 1, characterized in that, Before determining whether the exhaust back pressure meets the vehicle's requirements, the method further includes: The exhaust back pressure is obtained by a pressure sensor.

11. The exhaust cooling method according to claim 10, characterized in that, The determination of whether the exhaust back pressure meets the vehicle's requirements includes: If the exhaust back pressure is within the first preset air pressure range, it is determined that the exhaust back pressure meets the vehicle requirements; If the exhaust back pressure is outside the first preset air pressure range, then the air compressor will be turned off or not turned on.

12. The exhaust cooling method according to claim 2, characterized in that, The temperature of the airflow collected at the exhaust tailpipe port includes: Temperature is measured by acquiring at least two valid airflow measurements using at least two temperature sensors; The airflow temperature at the exhaust tailpipe inlet is determined based on the average of the temperatures measured by the at least two effective airflow measurements.

13. The exhaust cooling method according to claim 12, characterized in that, The method of obtaining at least two effective airflow measurement temperatures through at least two temperature sensors includes: The temperature sensor is used to obtain multiple airflow measurement temperatures; The at least two valid airflow measurement temperatures are obtained from the plurality of airflow measurement temperatures, and the difference between any two of the at least two valid airflow measurement temperatures is less than a preset value.

14. The exhaust cooling method according to claim 1, characterized in that, Before determining whether the exhaust back pressure meets the vehicle's requirements, the method further includes: determining that the vehicle is in hybrid mode.

15. An electronic device, characterized in that, It includes a controller, a memory, and one or more programs, said one or more programs being stored in the memory and configured to be executed by the controller, said one or more programs including instructions for performing the steps in the exhaust cooling method as described in any one of claims 1-14.

16. A vehicle, characterized in that, The vehicle includes the electronic equipment as described in claim 15 and at least one exhaust system component, the at least one exhaust system component being a part through which exhaust airflow passes.

17. The vehicle according to claim 16, characterized in that, The at least one exhaust system component includes an intake device, an air compressor, a vehicle muffler, and an exhaust tailpipe. The intake device, the air compressor, the vehicle muffler, and the exhaust tailpipe are connected in sequence. The intake device is used to filter cold air. The air compressor is used to compress the cold air and input the cold air flow into the vehicle muffler. The vehicle muffler is used to mix the cold air flow and the exhaust air flow to form exhaust. The exhaust tailpipe is used to discharge the exhaust.

18. The vehicle according to claim 17, characterized in that, The air intake device is connected to the first end of the air compressor through a first pipe, the second end of the air compressor is connected to the first end of the vehicle muffler through a second pipe, and the second section of the vehicle muffler is connected to the exhaust tailpipe.

19. The vehicle according to claim 18, characterized in that, The vehicle muffler includes a vehicle exhaust muffler, a cold air mixing chamber, and a drain hole. The second end of the air compressor is connected to the first end of the cold air mixing chamber through the second pipe. The second end of the cold air mixing chamber is connected to the vehicle exhaust muffler through the third pipe. The third end of the cold air mixing chamber is connected to the drain hole.

20. A computer-readable storage medium, characterized in that, The device contains a computer program that is executed by a processor to implement the steps of the method according to any one of claims 1-14.

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