Abnormal sound control method, device and equipment for active noise elimination valve and readable storage medium

Abstract

The invention discloses an abnormal sound control method, device and equipment for an active noise elimination valve and a readable storage medium, under the background that the arrangement space of a hybrid vehicle type exhaust system is limited and the NVH performance is affected, although the active noise elimination valve of the exhaust system improves the noise elimination effect, the abnormal sound problem exists, and according to the control method, an engine rotating speed signal and a whole vehicle power-on and power-off request signal are obtained in real time; the working condition that the noise elimination valve easily generates metal knocking sound is accurately locked, when it is monitored that the rotating speed of an engine is reduced to be below an idle speed threshold value and a whole vehicle power-off request signal is activated, the active noise elimination valve of the exhaust system is adjusted to the middle transition opening degree in time, rigid collision of a valve plate and a valve body under the opening degree of 0% or 100% is effectively avoided, the metal knocking abnormal sound is eliminated, and the service life of the exhaust system is prolonged. NVH (Noise Vibration and Harshness) performance of the whole vehicle is remarkably improved, interference of abnormal sound on driving experience is reduced, the strict requirement of a user on quietness of the vehicle is met, and the silence performance advantage is provided for a hybrid vehicle model in market competition.

Description

Technical Field

[0001] The present application relates to the field of active muffler valves for exhaust systems, and in particular to a method, device, equipment and readable storage medium for controlling abnormal noise of active muffler valves. Background Art

[0002] With the changes in the automobile market, the proportion of hybrid models in the market is increasing. Compared with traditional fuel vehicles, customers have higher and higher requirements for the range of hybrid models. The current technical solutions are large oil and small electricity or small oil and large electricity. Regardless of the solution, it affects the layout space of the exhaust system, resulting in the exhaust system's silencer volume gradually becoming smaller, resulting in the deterioration of the NVH of the entire vehicle, affecting the customer's driving experience.

[0003] To address the issue of insufficient noise reduction capacity in exhaust systems, active noise reduction valve technology has been applied to exhaust systems. This technology improves noise reduction to a certain extent through the regulation of the active noise reduction valve.

[0004] However, when the vehicle engine is in operation, the exhaust system's active muffler valve will open at different degrees. For example, when the opening is 0% or 100%, the valve plate will produce a strong metallic knocking sound with the starting and ending points of the valve body, generating abnormal noise, which seriously affects the comfort experience of the driver and passengers and cannot meet users' increasingly stringent requirements for vehicle quietness. Summary of the Invention

[0005] The present application provides a method, device, equipment and readable storage medium for controlling abnormal noise of an active muffler valve, which can solve the technical problem in the related art that when the vehicle engine is in working condition, the opening of the exhaust system active muffler valve is 0% or 100%, and the valve plate will form a strong metal knocking sound with the starting and ending points of the valve body, generating abnormal noise, seriously affecting the comfort experience of the driver and passengers, and failing to meet the users' increasingly stringent requirements for vehicle quietness.

[0006] In a first aspect, an embodiment of the present application provides a method for controlling abnormal noise of an active muffler valve in an exhaust system, the method comprising: Real-time acquisition of engine speed signals and vehicle power-on and power-off request signals; If the engine speed is detected to be below the idle threshold and the vehicle power-off request signal is activated, an opening adjustment instruction is sent to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust to the intermediate transition opening. In conjunction with the first aspect, in one embodiment, after the step of sending an opening adjustment instruction to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust to an intermediate transition opening if the engine speed is detected to drop below the idle threshold and the vehicle power-off request signal is activated, the following steps are further included: If it is detected that the engine speed exceeds the starting threshold and the vehicle power-on request signal is activated, an opening adjustment instruction is sent to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust from the intermediate transition opening to 0% opening.

[0007] In combination with the first aspect, in one embodiment, the method for controlling abnormal noise of an active muffler valve in an exhaust system further includes: Real-time acquisition of engine speed signal, vehicle speed signal, exhaust system active muffler valve required angle signal and initialization request signal; If it is detected that the engine speed exceeds the drag threshold, the vehicle speed is higher than the set speed threshold, and the exhaust system active muffler valve requires the angle to switch to the set opening threshold, a full-stroke initialization zeroing instruction is sent to the exhaust system active muffler valve in combination with the initialization request signal; After the initialization is completed, the opening will be automatically restored to the original setting opening threshold.

[0008] In combination with the first aspect, in one embodiment, the method for controlling abnormal noise of an active muffler valve in an exhaust system further includes: Real-time acquisition of engine speed signal, vehicle speed signal, exhaust system active muffler valve required angle signal, initialization request signal and window status signal; If it is detected that the engine speed exceeds the drag threshold, the vehicle speed is higher than the set speed threshold, the exhaust system active muffler valve demand angle is switched to the set opening threshold, and the window is in the open state, a full-stroke initialization zeroing instruction is sent to the exhaust system active muffler valve in combination with the initialization request signal; After the initialization is completed, the opening will be automatically restored to the set opening threshold.

[0009] In combination with the first aspect, in one embodiment, the window being in an open state includes: The rear windows are fully or partially open.

[0010] In combination with the first aspect, in one embodiment, the window being in an open state includes: The sunroof is fully or partially open.

[0011] In a second aspect, an embodiment of the present application provides an exhaust system active muffler valve abnormal noise control device, the exhaust system active muffler valve abnormal noise control device comprising: The operating condition identification module is used to obtain the engine speed signal and the vehicle power on and off request signal in real time; The opening control module is used to send an opening adjustment instruction to the exhaust system active muffler valve if it detects that the engine speed drops below the idle threshold and the vehicle power-off request signal is activated, thereby controlling the exhaust system active muffler valve to adjust to an intermediate transition opening.

[0012] In combination with the second aspect, in one embodiment, the opening control module is also used to send an opening adjustment instruction to the exhaust system active muffler valve if it is monitored that the engine speed exceeds the starting threshold and the vehicle power-on request signal is activated, so as to control the exhaust system active muffler valve to adjust from the intermediate transition opening to 0% opening.

[0013] In a third aspect, an embodiment of the present application provides an exhaust system active muffler valve abnormal noise control device, the exhaust system active muffler valve abnormal noise control device comprising a processor, a memory, and an exhaust system active muffler valve abnormal noise control program stored on the memory and executable by the processor, wherein when the exhaust system active muffler valve abnormal noise control program is executed by the processor, the steps of the exhaust system active muffler valve abnormal noise control method as described in some of the above embodiments are implemented.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which is stored a program for controlling abnormal noise of an active muffler valve of an exhaust system. When the program for controlling abnormal noise of an active muffler valve of an exhaust system is executed by a processor, the steps of the method for controlling abnormal noise of an active muffler valve of an exhaust system as described in some of the above embodiments are implemented.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present application include: Hybrid vehicles face limited exhaust system layout space and compromised NVH performance. While active exhaust mufflers improve noise reduction, they can still cause unwanted noise. This control method, by acquiring real-time engine speed signals and vehicle power-on / off request signals, precisely identifies operating conditions where the muffler valve is prone to producing metallic knocking noise. When the engine speed drops below an idle threshold (e.g., 600 rpm) and the vehicle power-off request signal is activated, the active exhaust muffler valve is promptly adjusted to an intermediate transition opening (e.g., 45%, 50%, or 55%). This effectively avoids rigid collision between the valve plate and the valve body at 0% or 100% opening, eliminating the unwanted metallic knocking noise. Furthermore, the engine generates a continuous and relatively stable noise at idle, which acts as a natural background sound to mask the unwanted noise generated by the muffler valve opening adjustment. This significantly improves vehicle NVH performance and reduces the impact of unwanted noise on the driving experience, meeting users' stringent requirements for vehicle quietness and providing hybrid vehicles with a quieter performance advantage in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of an embodiment of a method for controlling abnormal noise of an active muffler valve in an exhaust system of the present application; Figure 2 This is a flow chart for controlling the opening of the muffler valve in the method for controlling abnormal noise of the active muffler valve in the exhaust system of this application; Figure 3This is a schematic diagram of the hardware structure of the exhaust system active muffler valve abnormal noise control device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] It is important to understand that with the changes in the automobile market, the proportion of hybrid models in the market is increasing. Compared with traditional fuel vehicles, customers have higher and higher requirements for the range of hybrid models. The current technical solutions are large oil and small electricity or small oil and large electricity. Regardless of the solution, it affects the layout space of the exhaust system, resulting in the exhaust system's silencer volume gradually becoming smaller, resulting in the deterioration of the NVH of the entire vehicle, affecting the customer's driving experience.

[0019] To compensate for the insufficient noise reduction capacity of the exhaust system, active noise reduction valve technology has been applied to the exhaust system. This technology improves the noise reduction effect to a certain extent through the regulation of the active noise reduction valve.

[0020] However, when the vehicle engine is in operation, the exhaust system's active muffler valve will open at different degrees. For example, when the opening is 0% or 100%, the valve plate will produce a strong metallic knocking sound with the starting and ending points of the valve body, generating abnormal noise, which seriously affects the comfort experience of the driver and passengers and cannot meet users' increasingly stringent requirements for vehicle quietness.

[0021] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0022] In a first aspect, an embodiment of the present application provides a method for controlling abnormal noise of an active muffler valve in an exhaust system.

[0023] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the method for controlling abnormal noise of the active muffler valve in the exhaust system of this application. Figure 1 As shown, the method for controlling abnormal noise of the active muffler valve of the exhaust system includes: S100: Real-time acquisition of engine speed signal and vehicle power-on / off request signal; S200: If it is detected that the engine speed drops below the idle threshold and the vehicle power-off request signal is activated, an opening adjustment instruction is sent to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust to an intermediate transition opening.

[0024] In this embodiment, given the limited space available for the exhaust system of hybrid vehicles and the impact on NVH performance, the active muffler valve in the exhaust system improves the noise reduction effect, but still presents the problem of abnormal noise. This control method obtains the engine speed signal and the vehicle power-on and power-off request signal in real time to accurately identify the operating conditions where the muffler valve is prone to producing metallic knocking noise. When the engine speed is detected to drop below the idle threshold (e.g., 600 rpm) and the vehicle power-off request signal is activated, the active muffler valve in the exhaust system is promptly adjusted to an intermediate transition opening (e.g., 45%, 50%, or 55%). This effectively avoids the rigid collision between the valve plate and the valve body at 0% or 100% opening, eliminates the abnormal metallic knocking noise, significantly improves the NVH performance of the vehicle, reduces the interference of abnormal noise on the driving experience, meets users' stringent requirements for vehicle quietness, and provides hybrid vehicles with a quiet performance advantage in the market competition.

[0025] Among them, the engine will produce continuous and relatively stable noise when idling. This noise can serve as a natural background sound to cover up the abnormal noise caused by the adjustment of the muffler valve opening. When the engine speed is detected to drop below the idle threshold, it means that the engine is still in operation. At this time, the engine noise can effectively cover up the abnormal noise that may be generated during the adjustment of the muffler valve to the intermediate transition opening (such as the active muffler valve plate or other parts are loose or damaged; if the interface of the muffler valve is not tightly sealed, resulting in air leakage, etc.). If the muffler valve opening is adjusted after the engine is completely shut down, even a slight knocking noise will become very obvious due to the loss of engine noise, seriously affecting driving comfort. Adjustments are made in advance when the engine speed drops to the idle threshold, and the engine idle noise is cleverly used to effectively mask abnormal noises. If the muffler valve is controlled to adjust the opening after the engine is shut down, the engine noise will quickly disappear at the moment of shutdown. At this time, the metal knocking sound that may be generated during the adjustment of the muffler valve opening to the middle transition will be transmitted to the ears of the driver and passengers without any obstruction. Advance monitoring and opening adjustment when the engine speed is at the idle threshold ensure that there is always engine noise as background sound during the operation of the muffler valve. As the engine speed further decreases until it is shut down, the noise gradually weakens, but the muffler valve has completed the opening adjustment at this time, which effectively avoids the problem of abnormal noise exposure and maintains a quiet environment in the car.

[0026] Furthermore, in one embodiment, after S200, the following steps are further included: S300: If it is detected that the engine speed exceeds the starting threshold and the vehicle power-on request signal is activated, an opening adjustment instruction is sent to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust from the intermediate transition opening to 0% opening.

[0027] In this embodiment, during the engine startup process, the airflow state in the exhaust system will change dramatically. If the muffler valve is in an intermediate transition opening (such as 45%, 50% or 55% opening), the valve plate and the valve body may vibrate or collide due to the impact of the airflow, thereby causing abnormal noise. Adjusting the muffler valve to 0% opening can make the valve plate fit tightly against the valve body, reduce the rigid collision caused by relative movement, avoid abnormal noises such as metal knocking sounds, and provide a quiet starting environment for the driver and passengers. During the engine startup phase, the exhaust system needs to operate in a specific airflow channel and pressure state to ensure the normal operation and performance of the engine. A muffler valve with a 0% opening can limit the exhaust path, so that the exhaust gas is concentrated and discharged through a specific channel, which helps to maintain stable pressure and air in the exhaust system. The flow rate allows the engine to obtain more ideal exhaust conditions when starting, optimizes the combustion efficiency and power output when the engine starts, and is also beneficial to improving the NVH performance of the entire vehicle. When the engine speed is detected to exceed the starting threshold (such as 1000rpm) and the vehicle power-on request signal is activated, the exhaust system active muffler valve is adjusted from the intermediate transition opening to 0% opening, effectively avoiding the metal knocking sound caused by improper valve position at the moment of engine starting, ensuring a smooth and quiet vehicle starting process. Combined with the control strategy when the power is off, a noise prevention and control system covering the entire process of vehicle start-stop is formed, further improving the NVH performance of the entire vehicle, continuously optimizing the comfort experience of drivers and passengers, creating a quieter and more comfortable driving environment for users, and strengthening the product's competitive advantage in quietness.

[0028] Among them, during the engine startup process, due to the high-speed operation of various components, ignition and fuel injection, etc., a large and complex startup noise will be generated. When the engine speed is detected to exceed the startup threshold and the vehicle power-on request signal is activated, the engine startup noise is already more obvious. At this stage, an opening adjustment instruction is sent to the exhaust system active muffler valve to adjust it from the intermediate transition opening to 0% opening. The abnormal noise that may be caused by the valve plate movement will be masked by the strong engine startup noise. If this opportunity is missed, the muffler valve opening will be adjusted after the engine startup is completed. Without the cover of the startup noise, the abnormal noise such as metal knocking sound caused by the opening change between the valve plate and the valve body will be easily noticed by the driver and passengers, affecting the driving experience. After the engine is started and enters the normal operating state, the noise will tend to be stable. At this time, if the muffler valve opening is adjusted significantly, such as from the middle opening to 0%, the abnormal noise generated will appear particularly abrupt in the relatively stable background noise due to the lack of cover from the noisy noise in the startup phase. When the engine speed exceeds the startup threshold, the adjustment is made, and the unevenness and high intensity of the noise in the startup phase are utilized to make the sound generated by the muffler valve opening adjustment blend into it, which will not bring obvious noise change perception to the driver and passengers, ensuring a smooth transition of the sound environment in the car and maintaining good quietness.

[0029] Furthermore, in one embodiment, the method for controlling abnormal noise of an active muffler valve in an exhaust system further includes: S400-1: Real-time acquisition of engine speed signal, vehicle speed signal, exhaust system active muffler valve required angle signal, and initialization request signal; S400-2: If it is detected that the engine speed exceeds the drag threshold, the vehicle speed is higher than the set speed threshold, and the exhaust system active muffler valve requires the angle to switch to the set opening threshold, a full-stroke initialization zeroing command is sent to the exhaust system active muffler valve in conjunction with the initialization request signal; S400-3: After completing the initialization, the opening is automatically restored to the original setting opening threshold.

[0030] In this embodiment, by acquiring the engine speed signal, vehicle speed signal, exhaust system active muffler valve demand angle signal and initialization request signal in real time, the appropriate working conditions for the initialization of the muffler valve are accurately judged. When the engine speed exceeds the drag threshold (such as 1000rpm), the vehicle speed is higher than the set speed threshold (such as 30km / h) and the muffler valve demand angle is switched to the set opening threshold (such as 30% opening), full-stroke initialization zeroing is performed in combination with the initialization request signal, which not only ensures that the muffler valve is accurately calibrated under stable working conditions, but also automatically returns to the original set opening threshold after completing the initialization zeroing, thereby ensuring the continuity of the muffler function. This control method is coordinated with the control strategy of the previous start-stop stage, further improving the abnormal noise control system of the muffler valve under all working conditions, comprehensively improving the NVH performance of the entire vehicle, and enhancing users' confidence in the quietness and reliability of the vehicle.

[0031] Furthermore, in one embodiment, the method for controlling abnormal noise of an active muffler valve in an exhaust system further includes: S500-1: Real-time acquisition of engine speed signal, vehicle speed signal, exhaust system active muffler valve required angle signal, initialization request signal, and window status signal; S500-2: If it is detected that the engine speed exceeds the drag threshold, the vehicle speed is higher than the set speed threshold, the exhaust system active muffler valve demand angle is switched to the set opening threshold, and the window is in the open state, a full-stroke initialization zeroing command is sent to the exhaust system active muffler valve in conjunction with the initialization request signal; S500-3: After completing the initialization, the opening is automatically restored to the set opening threshold.

[0032] In this embodiment, by synchronously acquiring the engine speed, vehicle speed, muffler valve demand angle, initialization request and window status signal, the complex working conditions suitable for muffler valve initialization are accurately captured. When the engine speed exceeds the drag threshold (such as 1000rpm), the vehicle speed is higher than the set speed threshold (such as 30km / h), and the muffler valve demand angle is switched to the set opening threshold (such as 30% opening), and the window is in the open state, the full-stroke initialization homing is performed in combination with the initialization request signal. The natural wind noise generated by the window opening is cleverly used as background sound to effectively mask the opening and closing sound of the muffler valve initialization process, avoiding the exposure of abnormal noise affecting the driving experience. After the initialization homing is completed, the set opening is automatically restored to ensure the continuous stability of the muffler function. This control strategy cooperates with the control methods under other working conditions to further improve the full-scene abnormal noise prevention and control system, while improving the vehicle's NVH performance, providing users with a quieter and more comfortable window-opening driving environment.

[0033] Furthermore, in one embodiment, in S500 - 2 , the rear windows are in a fully open or partially open state.

[0034] This embodiment precisely captures complex operating conditions suitable for muffler valve initialization, such as when the rear windows are fully or partially open, by simultaneously acquiring engine speed, vehicle speed, muffler valve demand angle, initialization request, and window status signals. When the engine speed exceeds the drag threshold, the vehicle speed exceeds the set speed threshold, and the muffler valve demand angle switches to the set opening threshold, full-stroke initialization and homing are performed in conjunction with the initialization request signal. At this point, the natural wind noise generated by the open rear windows serves as background sound, effectively masking the opening and closing sounds of the muffler valve initialization process regardless of the window opening degree, preventing the driver and passengers from noticing the unusual noise. After initialization and homing, the set opening is automatically restored, ensuring the continued stable operation of the muffler function. This control strategy, in conjunction with other control methods for different operating conditions, further improves the full-scenario noise prevention and control system, enhancing vehicle NVH performance while providing a quieter and more comfortable window-opening driving environment and meeting users' high expectations for vehicle quietness.

[0035] Furthermore, in one embodiment, in S500 - 2 , the sunroof is in a fully open or partially open state.

[0036] In this embodiment, by synchronously acquiring engine speed, vehicle speed, muffler valve desired angle, initialization request, and window status signals, the initialization of the muffler valve is precisely targeted when the sunroof is fully or partially open. When the engine speed exceeds the drag threshold, the vehicle speed exceeds the set speed threshold, and the muffler valve desired angle switches to the set opening threshold, full-stroke initialization and zeroing are performed in conjunction with the initialization request signal. At this point, the natural wind noise generated by the sunroof opening serves as background sound, effectively masking the opening and closing sounds of the muffler valve during initialization, preventing abnormal noise from disturbing the driver and passengers. After initialization and zeroing are completed, the set opening is automatically restored to maintain stable operation of the muffler function. This control strategy, in conjunction with other operating condition control methods, improves the full-scenario abnormal noise prevention and control system, further enhancing the vehicle's NVH performance, creating a quieter and more comfortable driving environment for users and meeting their stringent requirements for vehicle quietness.

[0037] Furthermore, in one embodiment, S400 (S400-1, S400-2 and S400-3), S500 (S500-1, S500-2 and S500-3) and S100 and S200 are not performed in any particular order.

[0038] In summary, if Figure 2As shown, the time t0-t1 is from vehicle power-on to engine dragging operation, at which time the exhaust system muffler valve opening is adjusted to 0% opening; the time period t1-t2 is from engine start to engine shutdown without power off, at which time the exhaust system muffler valve is displayed as a dotted line, which means that the exhaust system muffler valve in this stage is executed according to the preset engine operating condition-exhaust system muffler valve opening strategy table, and the detailed execution strategy of the strategy table will not be elaborated here; the time period t2-t3 is from the first engine shutdown to the second engine start; the exhaust system muffler valve opening is adjusted to 50% opening; t3-t4: from engine start to shutdown, at which time the exhaust system muffler valve is displayed as a dotted line, which means that the exhaust system muffler valve in this stage is executed according to the preset engine operating condition-exhaust system muffler valve opening strategy table; the time period t4-t5 is from engine shutdown and power off operation, at which time the exhaust system muffler valve opening is adjusted to 50% opening.

[0039] On the second aspect, the embodiment of the present application also provides an exhaust system active muffler valve abnormal noise control device, the exhaust system active muffler valve abnormal noise control device includes: a working condition identification module, which is used to obtain the engine speed signal and the vehicle power-on and power-off request signal in real time; an opening control module, which is used to send an opening adjustment instruction to the exhaust system active muffler valve if it is monitored that the engine speed drops below the idle threshold and the vehicle power-off request signal is activated, so as to control the exhaust system active muffler valve to adjust to an intermediate transition opening.

[0040] In this embodiment, the exhaust system active muffler valve abnormal noise control device uses the working condition recognition module to capture the engine speed and the vehicle's power-on and power-off signals in real time, and accurately locates the working conditions where the muffler valve is prone to produce metal knocking sounds; when it monitors that the engine speed drops below the idle threshold and the vehicle's power-off request signal is activated, the opening control module responds quickly and adjusts the muffler valve to the intermediate transition opening in time, effectively avoiding the rigid collision between the valve plate and the valve body at the extreme opening, eliminating the metal knocking noise, and the two work together to significantly improve the NVH performance of the vehicle, reduce the interference of abnormal noise on drivers and passengers, create a quiet and comfortable driving environment, meet users' pursuit of high-quality driving experience, and enhance the product's market competitiveness in terms of quiet performance.

[0041] Furthermore, in one embodiment, the opening control module is also used to send an opening adjustment instruction to the exhaust system active muffler valve if it is detected that the engine speed exceeds the starting threshold and the vehicle power-on request signal is activated, thereby controlling the exhaust system active muffler valve to adjust from the intermediate transition opening to 0% opening.

[0042] In this embodiment, the newly added control logic of the opening control module promptly adjusts the exhaust system active silencer valve from the intermediate transition opening to 0% opening when it detects that the engine speed exceeds the starting threshold and the vehicle power-on request signal is activated. The 0% opening can completely close the valve plate, forming a stable sealing structure at the moment of engine start-up, avoiding airflow noise and metal friction noise caused by irregular vibration of the valve plate in the half-open state; secondly, the high-temperature and high-pressure exhaust flow in the starting phase has the greatest impact on the valve plate. The closed state can effectively protect the valve plate from mechanical damage caused by airflow impact, thereby extending the life of components. The control strategy of the working condition identification module and the opening control module when the vehicle is powered off is combined with the two to form an abnormal noise prevention and control mechanism covering the entire vehicle start-stop process, continuously improving the NVH performance of the vehicle, and ensuring that the vehicle can provide a quiet and smooth experience for drivers and passengers during the starting and shutting down phases, fully meeting users' high requirements for vehicle quietness, and strengthening the product's advantages in quiet performance.

[0043] Among them, the functional implementation of each module in the above-mentioned exhaust system active silencer valve abnormal noise control device corresponds to the various steps in the above-mentioned exhaust system active silencer valve abnormal noise control method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0044] In a third aspect, an embodiment of the present application provides an exhaust system active muffler valve abnormal noise control device, which can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0045] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the exhaust system active muffler valve abnormal noise control device involved in the embodiment of the present application. In the embodiment of the present application, the exhaust system active muffler valve abnormal noise control device may include a processor, a memory, a communication interface and a communication bus.

[0046] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0047] Communication interfaces include input / output (I / O), physical, and logical interfaces, which interconnect components within the exhaust system active muffler valve noise control device and other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0048] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0049] The processor may be a general-purpose processor that can invoke a program stored in a memory to control abnormal noises in an exhaust system active muffler valve and execute the method for controlling abnormal noises in an exhaust system active muffler valve provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The methods executed when the program is invoked can be found in the various embodiments of the method for controlling abnormal noises in an exhaust system active muffler valve provided in the present application and will not be further described here.

[0050] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0051] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0052] The readable storage medium of the present application stores an exhaust system active muffler valve abnormal noise control program, wherein when the exhaust system active muffler valve abnormal noise control program is executed by the processor, the steps of the exhaust system active muffler valve abnormal noise control method as described above are implemented.

[0053] Among them, the method implemented when the exhaust system active muffler valve abnormal noise control program is executed can refer to the various embodiments of the exhaust system active muffler valve abnormal noise control method of this application, and will not be repeated here.

[0054] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0055] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0056] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0057] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0058] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0059] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of this application.

[0060] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for controlling abnormal noise of an active muffler valve in an exhaust system, characterized in that: The method for controlling abnormal noise of an active muffler valve in an exhaust system includes: Real-time acquisition of engine speed signals and vehicle power-on and power-off request signals; If it is detected that the engine speed drops below the idle threshold and the vehicle power-off request signal is activated, an opening adjustment instruction is sent to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust to the intermediate transition opening.

2. The method for controlling abnormal noise of an active muffler valve in an exhaust system according to claim 1, wherein: After the step of sending an opening adjustment instruction to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust to an intermediate transition opening if the engine speed is detected to drop below the idle threshold and the vehicle power-off request signal is activated, the following steps are also included: If it is detected that the engine speed exceeds the starting threshold and the vehicle power-on request signal is activated, an opening adjustment instruction is sent to the exhaust system active muffler valve to control the exhaust system active muffler valve to adjust from the intermediate transition opening to 0% opening.

3. The method for controlling abnormal noise of an active muffler valve in an exhaust system according to claim 1, wherein: The method for controlling abnormal noise of an active muffler valve in an exhaust system further includes: Real-time acquisition of engine speed signal, vehicle speed signal, exhaust system active muffler valve required angle signal and initialization request signal; If it is detected that the engine speed exceeds the drag threshold, the vehicle speed is higher than the set speed threshold, and the exhaust system active muffler valve requires the angle to switch to the set opening threshold, a full-stroke initialization zeroing instruction is sent to the exhaust system active muffler valve in combination with the initialization request signal; After the initialization is completed, the opening will be automatically restored to the original setting opening threshold.

4. The method for controlling abnormal noise of an active muffler valve in an exhaust system according to claim 1, wherein: The method for controlling abnormal noise of an active muffler valve in an exhaust system further includes: Real-time acquisition of engine speed signal, vehicle speed signal, exhaust system active muffler valve required angle signal, initialization request signal and window status signal; If it is detected that the engine speed exceeds the drag threshold, the vehicle speed is higher than the set speed threshold, the exhaust system active muffler valve demand angle is switched to the set opening threshold, and the window is in the open state, a full-stroke initialization zeroing instruction is sent to the exhaust system active muffler valve in combination with the initialization request signal; After the initialization is completed, the opening will be automatically restored to the set opening threshold.

5. The method for controlling abnormal noise of an active muffler valve in an exhaust system according to claim 4, characterized in that: The above-mentioned window is in the open state, including: The rear windows are fully or partially open.

6. The method for controlling abnormal noise of an active muffler valve in an exhaust system according to claim 4, characterized in that: The above-mentioned window is in the open state, including: The sunroof is fully or partially open.

7. An exhaust system active muffler valve abnormal noise control device, characterized in that: The exhaust system active muffler valve abnormal noise control device includes: The operating condition identification module is used to obtain the engine speed signal and the vehicle power on and off request signal in real time; The opening control module is used to send an opening adjustment instruction to the exhaust system active muffler valve if it detects that the engine speed drops below the idle threshold and the vehicle power-off request signal is activated, thereby controlling the exhaust system active muffler valve to adjust to an intermediate transition opening.

8. The device for controlling abnormal noise of an active muffler valve in an exhaust system according to claim 7, wherein: The opening control module is also used to send an opening adjustment instruction to the exhaust system active muffler valve if it is monitored that the engine speed exceeds the starting threshold and the vehicle power-on request signal is activated, so as to control the exhaust system active muffler valve to adjust from the intermediate transition opening to 0% opening.

9. An exhaust system active muffler valve abnormal noise control device, characterized in that: The exhaust system active muffler valve abnormal noise control device includes a processor, a memory, and an exhaust system active muffler valve abnormal noise control program stored in the memory and executable by the processor, wherein when the exhaust system active muffler valve abnormal noise control program is executed by the processor, the steps of the exhaust system active muffler valve abnormal noise control method as described in any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores an exhaust system active muffler valve abnormal noise control program, wherein when the exhaust system active muffler valve abnormal noise control program is executed by the processor, the steps of the exhaust system active muffler valve abnormal noise control method as described in any one of claims 1 to 6 are implemented.

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