Signal processing method of engine, vehicle, storage medium and program product

Abstract

The invention discloses a signal processing method of an engine, a vehicle, a storage medium and a program product. The method is applied to a control system of an engine, the control system at least comprises a front oxygen sensor and an oil way system, and the method comprises the steps that a first target signal collected by the front oxygen sensor is obtained; the oscillation intensity of the first target signal is determined, and the oscillation intensity is used for representing the fluctuation degree of the first target signal; the oil way system is corrected at least based on the oscillation intensity, and the corrected oil way system is used for injecting fuel oil with the oil amount corresponding to the oscillation intensity to the engine; the corrected feedback signal of the oil way system is output to the front oxygen sensor, a first target signal collected by the front oxygen sensor is updated through the feedback signal, and the oscillation intensity of the updated first target signal is smaller than that of the first target signal before updating. The technical problem that the signal processing effect of the engine is poor is solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a signal processing method for an engine, a vehicle, a storage medium and a program product. Background Art

[0002] At present, with the increasing awareness of environmental protection and the continuous upgrading of emission regulations, the emission control requirements for vehicle engines under different working conditions are becoming more and more stringent. For equivalent combustion engines, the amount of its emissions directly depends on the accuracy of the vehicle's entire control system in controlling the air-fuel ratio. The control system obtains feedback signals of the oxygen content in the exhaust gas through the front oxygen sensor, thereby adjusting the mixing ratio of fuel and air to ensure that the engine achieves satisfactory combustion efficiency and emission control.

[0003] However, when the oxygen sensor fails or is subject to external interference, its feedback signal may deviate without diagnostic processing, causing the entire control system to fail, and may cause the control system to be unable to accurately adjust the fuel and air mixture ratio, thereby affecting the engine's combustion efficiency and emission control.

[0004] In the above situation, the control system may be in an unstable working state, resulting in unstable engine operation, reduced working performance, and even oscillation. The generation of this oscillation phenomenon will further aggravate the instability of engine operation, which may cause the engine to lose control or even malfunction. This uncertain negative impact will affect the performance and stability of the entire control system, which may cause the engine to increase emissions under different working conditions and affect its environmental performance. Therefore, there is still a technical problem of poor signal processing effect of the engine.

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] Embodiments of the present invention provide a signal processing method for an engine, a vehicle, a storage medium, and a program product to at least solve the technical problem of poor signal processing effect of the engine.

[0007] According to one aspect of an embodiment of the present invention, there is provided a method for processing engine signals, which is applied to a control system of the engine, wherein the control system comprises at least a front oxygen sensor and an oil circuit system, and the method comprises: obtaining a first target signal collected by the front oxygen sensor, wherein the first target signal is used to characterize the degree of combustion of fuel in the engine during the combustion process; determining an oscillation intensity of the first target signal, wherein the oscillation intensity is used to characterize the degree of fluctuation of the first target signal; correcting the oil circuit system at least based on the oscillation intensity, wherein the corrected oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine; and outputting a feedback signal of the corrected oil circuit system to the front oxygen sensor, so as to update the first target signal collected by the front oxygen sensor using the feedback signal, wherein the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

[0008] Optionally, the oscillation intensity includes an oscillation intensity level, and the oscillation intensity level is positively correlated with the degree of correction of the oil circuit system. Determining the oscillation intensity of the first target signal includes: in response to the first target signal being in an oscillating state, determining the oscillation intensity level of the first target signal.

[0009] Optionally, the method includes: determining the amplitude of the air-fuel ratio corresponding to the first target signal within the sampling period, wherein the air-fuel ratio is used to represent the weight ratio between the air in the engine and the fuel in the engine during the combustion of the fuel in the engine, and the weight ratio is related to the degree of combustion; based on the amplitude, determining that the first target signal is in an oscillating state.

[0010] Optionally, based on the amplitude, determining that the first target signal is in an oscillating state includes: determining a first number of times that the amplitude exceeds a first amplitude threshold within a sampling period, and a second number of times that the amplitude exceeds a second amplitude threshold, wherein the first amplitude threshold and the second amplitude threshold are used to characterize a predetermined range of leanness or richness of the fuel in the engine in a mixed substance in the engine, and the second amplitude threshold is greater than the first amplitude threshold; in response to the first number being greater than the number threshold, and the second number being greater than the number threshold, determining that the first target signal is in an oscillating state.

[0011] Optionally, in response to the first number being greater than the number threshold, and the second number being greater than the number threshold, determining that the first target signal is in an oscillating state includes: in response to the amplitude alternately exceeding the first amplitude threshold and the second amplitude threshold within the sampling period, the first number being greater than the number threshold, and the second number being greater than the number threshold, determining that the first target signal is in an oscillating state.

[0012] Optionally, determining the oscillation intensity level of the first target signal includes: determining an integral result of the air-fuel ratio within a sampling period; based on the integral result, determining an average amplitude of the first target signal within the sampling period; based on the average amplitude, a first number, and a second number, determining the oscillation intensity level, wherein the average amplitude, the first number, and the second number are positively correlated with the oscillation intensity level.

[0013] Optionally, determining the oscillation intensity level based on the average amplitude, the first number and the second number includes: in response to not receiving a correction instruction for the front oxygen sensor, determining the oscillation intensity level based on the average amplitude, the first number and the second number, wherein the correction instruction is used to correct the first target signal collected by the front oxygen sensor.

[0014] Optionally, the oil circuit system is corrected at least based on the oscillation intensity, including: correcting the oil circuit system based on the oscillation intensity, and the engine's intake flow and / or the oxygen storage performance index of the catalyst, wherein the catalyst is used to convert the gas generated during the combustion of the fuel in the engine, and the oxygen storage performance index is used to indicate the quality of the oxygen storage performance of the catalyst.

[0015] Optionally, the method further includes: in response to receiving a correction instruction, correcting the oil circuit system according to correction data corresponding to the correction instruction.

[0016] Optionally, the control system also includes a rear oxygen sensor, and the method also includes: acquiring a second target signal collected by the rear oxygen sensor, wherein the second target signal is used to characterize the oxygen content of the converted gas generated during the combustion of the fuel in the engine; performing feedback control on the rear oxygen sensor using the second target signal according to a feedback control strategy, wherein the feedback control strategy is used to represent a rule for performing feedback control on the rear oxygen sensor; and correcting the oil circuit system using the controlled rear oxygen sensor.

[0017] According to another aspect of an embodiment of the present invention, a signal processing device of an engine is also provided, including: an acquisition unit, used to acquire a first target signal collected by a front oxygen sensor, wherein the first target signal is used to characterize the degree of combustion of fuel in the engine during the combustion process; a determination unit, used to determine the oscillation intensity of the first target signal, wherein the oscillation intensity is used to characterize the degree of fluctuation of the first target signal; a correction unit, used to correct the oil circuit system at least based on the oscillation intensity, wherein the corrected oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine; an output unit, used to output a feedback signal of the corrected oil circuit system to the front oxygen sensor, so as to update the first target signal collected by the front oxygen sensor using the feedback signal, wherein the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

[0018] According to another aspect of an embodiment of the present invention, a control system of an engine is also provided, and the control system includes at least: a front oxygen sensor and an oil circuit system, wherein the front oxygen sensor is used to collect a first target signal, wherein the first target signal is used to characterize the degree of combustion of the fuel in the engine during the combustion process; the oil circuit system is used to make corrections based on the oscillation intensity of the first target signal and output a feedback signal to the front oxygen sensor, wherein the oscillation intensity is used to characterize the degree of fluctuation of the first target signal, and the corrected oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine, and the feedback signal is used to update the first target signal collected by the front oxygen sensor, and the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

[0019] According to another aspect of an embodiment of the present invention, a vehicle is provided, including: a memory and a processor, wherein the memory stores an executable program; and the processor is used to run the program, wherein any one of the above methods is executed when the program is run.

[0020] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored program, wherein when the program is executed, a processor of a device is controlled to execute any one of the above methods.

[0021] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising: one or more processors; a storage device for storing one or more programs; and a method in which, when the one or more programs are executed by the one or more processors, the one or more processors execute any one of the above methods.

[0022] In an embodiment of the present invention, in order to avoid the oscillation phenomenon of the engine caused by the front oxygen sensor, the first target signal collected by the front oxygen sensor can be obtained, and the signal is used to characterize the combustion degree of the fuel in the engine during the combustion process. The signal of the front oxygen sensor reflects the change of the oxygen content in the exhaust gas, which can help the control system adjust the mixing ratio of fuel and air. The oscillation intensity of the first target signal can be determined to characterize the fluctuation degree of the signal. The determination of the oscillation intensity can help evaluate the stability and accuracy of the first target signal. Based on the oscillation intensity, the oil circuit system in the control system can be corrected to inject the fuel corresponding to the oscillation intensity to the engine. Adjusting the fuel injection amount according to the signal fluctuation degree can improve the combustion efficiency and reduce the generation of emissions. The feedback signal of the corrected oil circuit system is output to the front oxygen sensor to update the first target signal using the feedback signal. Through feedback control, the fuel supply can be continuously optimized to improve the combustion efficiency and emission control performance of the engine. In this embodiment, by processing and correcting the first target signal of the front oxygen sensor, the oil circuit system can be adjusted according to the real-time combustion situation to improve the combustion efficiency and the accuracy of emission control. Through the feedback control mechanism, the fuel supply can be continuously updated to keep the engine in a stable combustion state under different working conditions and reduce the generation of emissions. By reducing the oscillation intensity of the first target signal, the stability of the control system can be improved, and the uncertainty caused by system oscillation can be reduced, thereby improving the performance and reliability of the control system, thereby achieving the technical effect of improving the signal processing effect of the engine and solving the technical problem of poor signal processing effect of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 is a flow chart of a signal processing method for an engine according to an embodiment of the present invention;

[0025] Figure 2 is a flow chart of a method for controlling a wide-band oxygen sensor signal of an engine when oscillation occurs according to an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of a closed loop circuit of a wide-range oxygen sensor signal of an engine when oscillation occurs according to an embodiment of the present invention;

[0027] Figure 4 is a system block diagram of a control system of an engine according to an embodiment of the present invention;

[0028] Figure 5is a structural block diagram of a signal processing device for an engine according to an embodiment of the present invention;

[0029] Figure 6 is a structural block diagram of an autonomous driving vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof 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 necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] According to an embodiment of the present invention, a method embodiment of engine signal processing is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0033] Figure 1 FIG. 1 is a flow chart of a signal processing method for an engine according to an embodiment of the present invention. Figure 1 As shown, the method is applied to the control system of the engine, the control system at least includes a front oxygen sensor and an oil circuit system, and includes the following steps:

[0034] Step S102, obtaining a first target signal collected by the front oxygen sensor.

[0035] In the technical solution provided in the above step S102 of the present invention, the control system of the engine can also be referred to as the closed-loop system or closed-loop control system of the engine. The closed-loop system refers to the real-time monitoring and control of the parameters and feedback information during the operation of the engine to adjust the fuel and air mixture ratio to ensure that the engine can operate stably under different working conditions and maintain satisfactory performance and emission control. The control system includes at least a front oxygen sensor and an oil circuit system.

[0036] Optionally, the front oxygen sensor can also be called an oxygen sensor or an oxygen sensor. The front oxygen sensor is a sensor used to measure the oxygen content in the exhaust gas. Its main function is to monitor the oxygen concentration in the engine exhaust gas. That is, the front oxygen sensor can reflect the mixing ratio of air and fuel in the exhaust system, that is, the air-fuel ratio (which can be called air-fuel ratio / exhaust air-fuel ratio) by monitoring the oxygen content in the exhaust gas.

[0037] Optionally, the first target signal can be used to characterize the degree of combustion of the fuel in the engine during the combustion process, and can also be called a front oxygen signal or an oxygen sensor signal, that is, the first target signal can be used to reflect the air-fuel ratio of the exhaust system of the engine. That is, through the front oxygen sensor signal, the engine control system can monitor and adjust the air-fuel ratio in real time to ensure that the engine achieves satisfactory combustion efficiency and emission control under different operating conditions.

[0038] In this embodiment, in order to avoid deviation or failure of the front oxygen sensor and ensure the signal processing effect of the engine, a first target signal collected by the front oxygen sensor can be obtained, which can reflect the combustion process of the fuel in the engine during the combustion process.

[0039] Optionally, in order to enable the engine control system to have a more comprehensive understanding of the conditions of the combustion process, thereby adjusting the mixture ratio of fuel and air, optimizing the fuel combustion process, improving combustion efficiency, reducing emissions, and ensuring the performance and environmental performance of the engine, the first target signal can be collected through the front oxygen sensor.

[0040] Optionally, the exhaust air-fuel ratio is collected by obtaining the mixture ratio of air and fuel in the exhaust system, that is, the ratio of air to fuel, through the front oxygen sensor signal. This ratio is very important for the combustion process of the engine and directly affects the efficiency of combustion and the quality of emissions produced. The front oxygen sensor is a sensor that can measure the oxygen concentration in the exhaust gas. It can sense the oxygen content in the exhaust gas and judge the mixture ratio of air and fuel based on the oxygen concentration. Under normal conditions, the front oxygen sensor will continuously monitor the oxygen concentration in the exhaust gas and feed this information back to the engine control unit. According to the front oxygen sensor signal, the engine control unit can adjust the fuel injection amount to maintain the appropriate air-fuel mixture ratio.

[0041] The exhaust air-fuel ratio of the exhaust system can be reflected by the front oxygen sensor signal, which can help the engine control system monitor the status of the engine combustion process in real time. If the air-fuel ratio deviates from the ideal value, it may lead to reduced combustion efficiency and more harmful emissions. Therefore, accurate collection of exhaust air-fuel ratio information is crucial to engine performance and emission control.

[0042] In an embodiment of the present invention, by collecting and analyzing the front oxygen sensor signal, accurate monitoring of the air-fuel ratio in the exhaust system can be achieved, helping to regulate the engine combustion process, improve combustion efficiency, reduce the generation of harmful emissions, and thus improve the engine's performance and environmental performance.

[0043] Step S104, determining the oscillation intensity of the first target signal.

[0044] In the technical solution provided in the above step S104 of the present invention, the oscillation intensity can be used to characterize the fluctuation degree of the first target signal, that is, it can be used to reflect the fluctuation degree of the air-fuel ratio, and can also be called signal oscillation intensity.

[0045] In this embodiment, after the first target signal is collected by the front oxygen sensor, the oscillation intensity of the first target signal may be determined according to the fluctuation magnitude of the first target signal.

[0046] Optionally, the front oxygen sensor is used to monitor the oxygen content in the exhaust gas and collect a first target signal that can represent the degree of combustion of the fuel during the combustion process of the engine. The first target signal can be analyzed to determine the fluctuation size of the first target signal. The fluctuation size reflects the degree of change of the first target signal, that is, the fluctuation degree of the fuel during the combustion process. By analyzing the fluctuation of the first target signal, the oscillation intensity of the first target signal can be identified. According to the results of the fluctuation size analysis, the oscillation intensity of the first target signal can be determined. The oscillation intensity is an indicator of the instability and fluctuation degree of the signal. A larger oscillation intensity indicates that the signal fluctuates violently and the instability of the fuel during the combustion process is higher; while a smaller oscillation intensity indicates that the signal fluctuates more smoothly and the fuel combustion process is relatively stable.

[0047] In the embodiment of the present invention, according to the oscillation intensity of the first target signal, the control system of the engine can adjust the fuel injection amount and other parameters to adapt to the fluctuation of the signal. By adjusting the fuel injection according to the oscillation intensity of the signal, the combustion process can be optimized, the combustion efficiency can be improved, and the generation of emissions can be reduced, thereby achieving more stable and efficient operation of the engine.

[0048] In summary, this embodiment can determine the oscillation intensity of the signal by performing fluctuation analysis on the first target signal collected by the front oxygen sensor, thereby helping the engine control system to optimize the combustion process and improve the performance and environmental performance of the engine. The above process is of great significance for ensuring the stability of engine combustion efficiency and emission control.

[0049] Optionally, by monitoring the fluctuation of the front oxygen sensor signal, different methods can be used to calculate the oscillation strength of the signal. For example, the oscillation strength of the front oxygen sensor signal can be evaluated by calculating the integrated area and amplitude of the front oxygen sensor signal.

[0050] It should be noted that the above process and method for determining the oscillation intensity of the front oxygen sensor are only for illustration and are not specifically limited here. As long as the process and method can reflect the fluctuation degree of the front oxygen sensor, they are within the protection scope of the embodiments of the present invention.

[0051] Step S106, correcting the oil system at least based on the oscillation intensity.

[0052] In the technical solution provided in the above step S106 of the present invention, the function of the oil circuit system is to transport the fuel from the fuel tank to the engine combustion chamber, and inject it through the fuel injector at a certain time and amount to mix with the air to form a combustible gas, which can also be called a fuel system. The modified oil circuit system can be used to inject fuel of a quantity corresponding to the shock intensity into the engine.

[0053] In this embodiment, after determining the oscillation intensity of the first target signal, the oil circuit system can be corrected at least based on the oscillation intensity, so that the corrected oil circuit system can inject an amount of fuel corresponding to the above oscillation intensity into the engine.

[0054] Optionally, after determining the oscillation intensity of the front oxygen sensor signal, it can be determined whether the oil circuit system needs diagnostic correction, that is, it can be determined whether the oil circuit system needs diagnostic correction. If an abnormality or fluctuation is detected in the front oxygen sensor signal, a diagnostic program may be triggered to detect and diagnose the problem. If it is found that correction is required after diagnosis, the post-diagnosis calculation will be performed, that is, the oil circuit system will be adjusted and corrected according to the diagnosis results.

[0055] Optionally, if it is determined that the oil circuit system does not need to be diagnosed and corrected, that is, the fluctuation of the front oxygen sensor signal is not caused by a system failure, but is caused by normal fluctuations or other reasons, then the correction model will be calculated. In this case, the oil circuit system can be corrected and adjusted at least according to the oscillation intensity to better adapt to the current working conditions and signal fluctuations.

[0056] In the embodiment of the present invention, by judging whether there is a diagnostic correction and performing corresponding processing according to the above situation, the abnormal fluctuation of the front oxygen sensor signal can be more intelligently dealt with to ensure the stability and accuracy of the engine control system. Diagnostic correction can help the control system to find and solve problems in a timely manner and reduce the uncertainty caused by faults. The correction model calculation for normal fluctuations can optimize the control strategy and improve the efficiency and performance of the control system. In summary, the above intelligent judgment and processing methods help to ensure the stable operation and accuracy of the front oxygen sensor control system.

[0057] Optionally, the corrected fuel injection amount is obtained through the front oxygen sensor signal, thereby achieving optimal control of the air-fuel ratio and improving the emission performance of the engine, thereby effectively coping with air-fuel ratio fluctuations caused by deviation or failure of the front oxygen sensor and ensuring stable and excellent engine emission performance.

[0058] Step S108: outputting the corrected feedback signal of the oil circuit system to the front oxygen sensor, so as to update the first target signal collected by the front oxygen sensor by using the feedback signal.

[0059] In the technical solution provided in the above step S108 of the present invention, the oscillation strength of the updated first target signal is smaller than the oscillation strength of the first target signal before the update.

[0060] In this embodiment, after the oil circuit system is corrected based on the oscillation intensity, a feedback signal of the corrected oil circuit system can be obtained, and the feedback signal can be output to the front oxygen sensor, so that the feedback signal is used to update the first target signal collected by the front oxygen sensor, so that the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

[0061] Optionally, the fuel injection is corrected according to the oscillation level of the front oxygen sensor signal, the oscillation intensity of the original system is reduced by limiting the fuel injection correction, and the oil circuit system is corrected based on the oscillation intensity. After the correction, a feedback signal is obtained and output to the front oxygen sensor for updating the first target signal collected by the front oxygen sensor.

[0062] Optionally, according to the oscillation level of the front oxygen sensor signal, the engine control system can adjust the fuel injection amount to reduce the oscillation intensity of the engine system. By limiting the amplitude and frequency of the injection correction, the fluctuation of the fuel injection can be effectively controlled, thereby reducing the oscillation degree of the system and improving stability and combustion efficiency. After the injection is corrected, the oil circuit system can be further adjusted according to the oscillation intensity of the system to adapt to the adjusted fuel injection amount (injection amount). By optimizing the above-mentioned operating parameters of the oil circuit system, the oscillation intensity of the system can be further reduced to ensure the stability and accuracy of the fuel supply. The corrected oil circuit system will generate new feedback signals reflecting the adjusted working state and fuel injection amount of the system. These feedback signals will be output to the front oxygen sensor for updating the first target signal collected by the front oxygen sensor.

[0063] In the embodiment of the present invention, the fuel injection correction is performed according to the oscillation level of the front oxygen sensor signal, and then the oil circuit system is adjusted based on the oscillation intensity, which can effectively reduce the oscillation intensity of the control system, improve the stability and combustion efficiency of the engine, and reduce the oscillation intensity. It can reduce the fluctuation of fuel injection, optimize the combustion process, reduce the generation of emissions, and improve the performance and environmental protection performance of the engine. By updating the feedback signal, the correction of the front oxygen sensor signal can be achieved, ensuring the accuracy and stability of the system feedback, and further improving the working efficiency and environmental protection performance of the engine.

[0064] In the above steps S102 to S108 of the present application, in order to avoid the oscillation phenomenon of the engine caused by the front oxygen sensor, the first target signal collected by the front oxygen sensor can be obtained, and the signal is used to characterize the degree of combustion of the fuel in the engine during the combustion process. The signal of the front oxygen sensor reflects the change of the oxygen content in the exhaust gas, which can help the control system adjust the mixing ratio of fuel and air. The oscillation intensity of the first target signal can be determined to characterize the degree of fluctuation of the signal. The determination of the oscillation intensity can help evaluate the stability and accuracy of the first target signal. Based on the oscillation intensity, the oil circuit system in the control system can be corrected to inject the fuel corresponding to the oscillation intensity into the engine. Adjusting the fuel injection amount according to the degree of signal fluctuation can improve the combustion efficiency and reduce the generation of emissions. The feedback signal of the corrected oil circuit system is output to the front oxygen sensor to update the first target signal using the feedback signal. Through feedback control, the fuel supply can be continuously optimized to improve the combustion efficiency and emission control performance of the engine. In this embodiment, by processing and correcting the first target signal of the front oxygen sensor, the oil circuit system can be adjusted according to the real-time combustion situation to improve the combustion efficiency and the accuracy of emission control. Through the feedback control mechanism, the fuel supply can be continuously updated to keep the engine in a stable combustion state under different working conditions and reduce the generation of emissions. By reducing the oscillation intensity of the first target signal, the stability of the control system can be improved, and the uncertainty caused by system oscillation can be reduced, thereby improving the performance and reliability of the control system, thereby achieving the technical effect of improving the signal processing effect of the engine and solving the technical problem of poor signal processing effect of the engine.

[0065] The following further describes the method for determining the oscillation intensity of the first target signal in this embodiment.

[0066] As an optional implementation method, the oscillation intensity includes an oscillation intensity level, and the oscillation intensity level is positively correlated with the degree of correction of the oil circuit system. Step S104, determining the oscillation intensity of the first target signal, includes: in response to the first target signal being in an oscillating state, determining the oscillation intensity level of the first target signal.

[0067] In this embodiment, in the process of determining the oscillation intensity of the first target signal, if the first target signal is in an oscillating state, the oscillation intensity level of the first target signal may be determined, wherein the oscillation intensity may include an oscillation intensity level. The oscillation intensity level is positively correlated with the degree of correction of the oil circuit system, that is, the greater the oscillation intensity, the greater the restriction correction required for the oil circuit system, and the smaller the oscillation intensity, the smaller the restriction correction required for the oil circuit system.

[0068] Optionally, in the process of determining the oscillation intensity of the first target signal, it can be determined whether the first target signal collected by the front oxygen sensor is in an oscillating state. If so, it means that the oil circuit system needs to be corrected, otherwise, it means that the oil circuit system does not need to be corrected. If it is in an oscillating state, it is necessary to further determine the oscillation intensity level to determine the degree of correction of the oil circuit system.

[0069] Optionally, by analyzing the first target signal collected by the front oxygen sensor, it can be determined whether the signal is in an oscillating state. The oscillating state indicates that the signal is fluctuating and unstable, and the oil system may need to be corrected to improve stability and combustion efficiency. If the first target signal is in an oscillating state, the oscillation intensity level is further determined. The oscillation intensity level can be classified according to the degree of fluctuation and frequency of the signal, for example, low, medium, and high levels. Different oscillation intensity levels represent the degree of signal fluctuation and the stability of the system, and are used to measure the instability and degree of fluctuation of the signal.

[0070] It should be noted that the number and size of the above-mentioned vibration intensity levels are only for illustration and are not specifically limited here.

[0071] Optionally, the degree of correction to the fuel system can be determined based on the determined shock intensity level. Generally, the greater the shock intensity, the greater the restriction correction to the fuel system to maintain the stability and accuracy of fuel injection. The degree of correction can be adjusted according to the different shock intensity levels to ensure the stability of the system and the combustion efficiency.

[0072] In the embodiment of the present invention, through the above method, the degree of correction of the oil circuit system can be determined according to the oscillation state and oscillation intensity level of the first target signal to optimize the fuel injection amount, improve the combustion efficiency and the stability of emission control. This process can help ensure the normal operation and performance optimization of the engine.

[0073] The following further describes a method for determining whether the first target signal is in an oscillating state in this embodiment.

[0074] As an optional embodiment, the method includes: determining the amplitude of the air-fuel ratio corresponding to the first target signal within a sampling period, wherein the air-fuel ratio is used to represent the weight ratio between the air in the engine and the fuel in the engine during the combustion of the fuel in the engine, and the weight ratio is related to the degree of combustion; based on the amplitude, determining that the first target signal is in an oscillating state.

[0075] In this embodiment, the amplitude of the air-fuel ratio corresponding to the first target signal within the sampling period can be determined. According to the amplitude, it can be determined whether the first target signal is in an oscillating state. The air-fuel ratio can be used to represent the weight ratio between the air in the engine and the fuel in the engine during the combustion of the fuel in the engine. The weight ratio is associated with the degree of combustion. The sampling period can also be called a calibration time.

[0076] Optionally, the oscillation intensity of the signal is calculated according to the fluctuation of the front oxygen sensor signal, and whether it is a unidirectional oscillation or a bidirectional oscillation, and the intensity of the oscillation are determined by the integrated area and the amplitude.

[0077] Optionally, the fluctuation size can be calculated by the integral area and amplitude of the signal. The integral area represents the total amount of fluctuation of the signal within a certain period of time, while the amplitude represents the maximum amplitude of the fluctuation. By analyzing and processing the signal waveform, the oscillation intensity of the signal can be calculated to reflect the fluctuation degree and stability of the signal.

[0078] Optionally, the waveform characteristics of the signal can be used to determine whether the signal is a unidirectional oscillation or a bidirectional oscillation. Unidirectional oscillation refers to the fluctuation of the signal in one direction, while bidirectional oscillation means that the signal fluctuates in both the positive and negative directions. Determining whether the signal is a unidirectional or bidirectional oscillation helps to understand the fluctuation pattern of the signal and further analyze the periodicity and stability of the signal.

[0079] Optionally, the signal's oscillation strength can be determined by integrating the results of the area and amplitude, combined with the signal's fluctuation pattern (e.g., unidirectional or bidirectional oscillation). Oscillation strength can be used to assess the instability and volatility of a signal. Through a model or algorithm, the oscillation strength is converted into an oscillation strength level, which can usually be divided into different levels, such as low, medium, and high, for further analysis and processing.

[0080] Optionally, the calculated oscillation intensity can be converted into an oscillation intensity level by establishing a corresponding model or algorithm. This hierarchical processing helps to quantitatively evaluate the fluctuation degree and stability of the signal and provide a basis for subsequent adjustment and control.

[0081] In the embodiment of the present invention, the above method can be used to calculate the oscillation intensity of the signal according to the fluctuation of the front oxygen sensor signal, determine whether it is a one-way or two-way oscillation, and determine the oscillation intensity level. This process helps to accurately evaluate the stability and fluctuation of the signal, provide guidance for subsequent control and adjustment, further optimize the combustion process, and improve the performance and environmental performance of the engine.

[0082] Optionally, calculating the integral of the oxygen sensor signal within the calibration time can be used as one of the conditions for judging the oscillation intensity. The calibration time refers to the integral calculation of the oxygen sensor signal within a certain time range. The integral is the cumulative sum of the signal over time, which can reflect the overall change of the signal. By integrating the oxygen sensor signal within the calibration time, the overall fluctuation or change of the signal can be obtained, which is used to evaluate the fluctuation degree and stability of the signal. The result of the integration can reflect the fluctuation degree of the signal, that is, the total amount of change of the signal within the calibration time. A larger integral value indicates that the signal fluctuates more during the time period and the instability of the signal is higher. By analyzing the integration results, the oscillation intensity of the oxygen sensor signal can be judged. A larger integral value may indicate that the signal has larger fluctuations and instability, which requires further adjustment and control.

[0083] Optionally, the integral result within the calibration time is used as one of the conditions for judging the oscillation intensity. Generally speaking, a larger integral value may indicate a larger fluctuation of the signal and a higher instability of the combustion process, which requires corresponding processing. Combined with other conditions, such as amplitude, fluctuation frequency, etc., the oscillation intensity of the oxygen sensor signal is comprehensively evaluated to determine the adjustment of the fuel injection amount and the degree of correction of the oil circuit system.

[0084] In the embodiment of the present invention, by calculating the integral of the oxygen sensor signal within the calibration time, the total fluctuation amount of the signal can be obtained as one of the conditions for judging the oscillation intensity. The above method helps to quantitatively evaluate the fluctuation degree and stability of the signal, and provides a reference for subsequent control and adjustment to optimize the combustion process and improve the performance and environmental performance of the engine.

[0085] The following further describes the method for determining whether the first target signal is in an oscillating state based on the amplitude of this embodiment.

[0086] As an optional embodiment, based on the amplitude, determining that the first target signal is in an oscillating state includes: determining a first number of times that the amplitude exceeds a first amplitude threshold within a sampling period, and a second number of times that the amplitude exceeds a second amplitude threshold, wherein the first amplitude threshold and the second amplitude threshold are used to characterize a predetermined range of leanness or richness of the fuel in the engine in the mixed material in the engine, and the second amplitude threshold is greater than the first amplitude threshold; in response to the first number being greater than the number threshold, and the second number being greater than the number threshold, determining that the first target signal is in an oscillating state.

[0087] In this embodiment, in the process of determining that the first target signal is in an oscillating state based on the amplitude, the first number of times that the amplitude exceeds the first amplitude threshold value within the sampling period and the second number of times that the amplitude exceeds the second amplitude threshold value can be determined. If both the first number and the second number are greater than the number threshold value, it can be said that the first target signal is in an oscillating state. Among them, the first amplitude threshold value and the second amplitude threshold value can be used to represent the predetermined leanness and richness range of the fuel in the engine in the mixed material in the engine, that is, the threshold of the rich end and the lean end. The second amplitude threshold value is greater than the first amplitude threshold value, that is, the first amplitude threshold value is the threshold value of the lean end, and the second amplitude threshold value is the threshold value of the rich end. The first number can be the number of lean end crossings, which can be represented by nl. The second number can be the number of rich end crossings, which can be represented by nr. The mixed material can be a mixed gas in the engine.

[0088] Optionally, during the calibration time, the alternating oscillation of the signal is determined by the thresholds of the rich end and the lean end. By calculating the number of lean end crossings nl and the number of rich end crossings nr, the number of times the signal alternately oscillates can be evaluated. When the number of crossings of the lean end and the rich end is greater than a certain value, it can be determined that the system is oscillating. The above calculation method can help further confirm the oscillation intensity of the signal and serve as an important basis for judging system oscillation.

[0089] Optionally, the oscillation intensity of the system can be determined by calculating the number of amplitude magnitudes. Within the calibration time, by setting the thresholds (thresholds) of the rich end and the lean end, that is, the first amplitude threshold and the second amplitude threshold, it can be determined whether the signal oscillates alternately between the two thresholds. The thresholds of the rich end and the lean end can be used to determine the fluctuation range of the signal. By calculating the number of crossings of the rich end and the lean end within the calibration time, that is, the number of lean end crossings nl and the number of rich end crossings nr, the fluctuation of the signal can be evaluated.

[0090] The following further describes a method for determining that the first target signal is in an oscillating state if both the first number and the second number are greater than the number threshold in this embodiment.

[0091] As an optional implementation method, in response to the first number being greater than the number threshold, and the second number being greater than the number threshold, determining that the first target signal is in an oscillating state includes: in response to the amplitude alternately exceeding the first amplitude threshold and the second amplitude threshold within the sampling period, the first number being greater than the number threshold, and the second number being greater than the number threshold, determining that the first target signal is in an oscillating state.

[0092] In this embodiment, if the first number and the second number are both greater than the number threshold, in the process of determining that the first target signal is in an oscillating state, when the amplitude alternately exceeds the first amplitude threshold and the second amplitude threshold within the sampling period, it can be determined that the first target signal is in an oscillating state.

[0093] Optionally, when the two crossing times nl and nr increase alternately and are both greater than a certain value, it can be determined that the system is in an oscillating state. The alternating increase indicates that the oscillation frequency of the signal between the rich end and the lean end is high, and the fluctuation intensity of the system is large. By setting a certain threshold, when both nl and nr exceed the above threshold, it can be determined that the first target signal is in an oscillating state and requires further adjustment and processing.

[0094] Optionally, the number of crossings of nl and nr is used as one of the conditions for judging the oscillation intensity. When both crossings exceed the set threshold, it can be judged that the system has strong oscillations. By comprehensively considering the results of the amplitude size calculation and other conditions, such as the integral area, the fluctuation frequency, etc., the oscillation intensity of the system can be more comprehensively evaluated, providing a basis for subsequent adjustments and optimizations.

[0095] In the embodiment of the present invention, by calculating the number of amplitudes and determining the number of alternating crossings between the rich and lean ends, the oscillation intensity of the system can be evaluated. The above method helps to understand the fluctuation frequency and amplitude range of the system, further quantify the degree of fluctuation of the system, and provide guidance for adjusting and controlling the system to improve the stability and performance of the system.

[0096] The following further describes the method for determining the oscillation intensity level of the first target signal in this embodiment.

[0097] As an optional implementation method, step S104, determining the oscillation intensity level of the first target signal, includes: determining the integration result of the air-fuel ratio within the sampling period; based on the integration result, determining the average amplitude of the first target signal within the sampling period; based on the average amplitude, the first number and the second number, determining the oscillation intensity level, wherein the average amplitude, the first number and the second number are positively correlated with the oscillation intensity level.

[0098] In this embodiment, in the process of determining the oscillation intensity level of the first target signal, the integration result of the air-fuel ratio within the sampling period can be determined. Based on the integration result, the average amplitude of the first target signal within the sampling period can be determined. The level of oscillation intensity can be determined based on the average amplitude, the first number and the second number, wherein the average amplitude, the first number and the second number are positively correlated with the oscillation intensity level, that is, the larger the average amplitude and the more oscillation times, the greater the corresponding oscillation intensity. The integration result can also be called the integral area.

[0099] Optionally, the integral result can be determined by the following formula:

[0100] (1)

[0101] in, It can be used to express the result of integration, that is, the integrated area; Can be used to indicate sampling period; Can be used to indicate the air-fuel ratio.

[0102] Optionally, integral Indicates that during the sampling period, The cumulative absolute difference from the expected value of 1. This absolute difference can be used to evaluate The degree of fluctuation and stability of the signal, that is, the deviation of the signal from the expected value. In other words, the integral Indicates that between 0 and within the time frame, The cumulative absolute difference between and the expected value 1. The difference from the expected value 1 is processed as an absolute value and then accumulated over the entire sampling period. This integral can be used to measure the fluctuation of the signal, that is, the total amount by which the signal deviates from the expected value during the sampling period.

[0103] Optionally, when When the absolute difference between the expected value and 1 is large, the cumulative This means that the signal fluctuates more during the sampling period and is further away from the expected value. By analyzing the accumulation of absolute differences, the fluctuation amplitude and stability of the signal can be evaluated, thereby understanding the change and deviation of the signal. It can be used as an indicator to judge the fluctuation of the signal. A larger integral value indicates that the signal fluctuation is larger and further adjustment and control may be required. By analyzing the integral results, the oscillation strength of the signal can be determined, providing a basis for subsequent control and optimization.

[0104] In the embodiment of the present invention, the fluctuation and stability of the signal can be evaluated by integrating the accumulated absolute difference between the signal λ and the expected value 1 through the above method. This method helps to quantify the degree of fluctuation of the signal and provide guidance for subsequent adjustment and control to optimize the combustion process and improve the performance and environmental performance of the engine.

[0105] Alternatively, the average amplitude may be determined by the following formula:

[0106] (2)

[0107] in, Can be used to represent the average magnitude, that is, the average amplitude.

[0108] The process of determining the vibration intensity level based on the average amplitude, the first input and the second input times of this embodiment is further described below.

[0109] As an optional embodiment, the oscillation intensity level is determined based on the average amplitude, the first number and the second number, including: in response to not receiving a correction instruction for the front oxygen sensor, the oscillation intensity level is determined based on the average amplitude, the first number and the second number, wherein the correction instruction is used to correct the first target signal collected by the front oxygen sensor.

[0110] In this embodiment, in the process of determining the oscillation intensity level based on the average amplitude, the first number and the second number, if the correction instruction for the front oxygen sensor is not received, the oscillation intensity level can be determined based on the average amplitude, the first number and the second number, wherein the correction instruction can be used to correct the first target signal collected by the front oxygen sensor. The oscillation intensity level can also be called the intensity level of the oscillation.

[0111] Alternatively, when no diagnostic correction is applied, the correction model may be calculated based on the oscillation intensity level of the signal determined by averaging the amplitude and the number of oscillations.

[0112] Optionally, the oscillation intensity of the signal is evaluated by calculating the average amplitude and the number of oscillations. The larger the amplitude and the more oscillations, the more obvious the fluctuation of the signal and the greater the oscillation intensity. Through the comprehensive consideration of these two parameters, the system can determine the oscillation intensity level of the first target signal, and then further process or adjust the first target signal. According to the determined oscillation intensity level, the system will calculate the correction model. Depending on the magnitude of the oscillation intensity, the parameters or structure of the model may be adjusted accordingly to adapt to different working conditions and signal fluctuations. In particular, the restriction correction of the oil circuit may be adjusted to varying degrees according to the magnitude of the oscillation intensity to ensure the stability of combustion efficiency and emission performance.

[0113] In the existing closed-loop control system, if the current oxygen sensor deviates or fails, it will cause the front oxygen closed-loop control system to oscillate, which will in turn affect the engine's emission performance, including deterioration of the engine's original emissions, decreased catalyst conversion efficiency, and serious excess emissions.

[0114] In an embodiment of the present invention, in order to address the above-mentioned problems, a closed-loop control method for a front oxygen sensor of an engine is provided, which aims to weaken or eliminate the fluctuation of the air-fuel ratio when the front oxygen sensor has deviations or failures, thereby improving the stability of the closed-loop control of the front oxygen sensor, enhancing the robustness of engine emissions, and improving the emission performance of the engine.

[0115] The above control method can effectively deal with the fluctuation problem caused by the abnormal signal of the front oxygen sensor, and avoid the resulting reduction in emission performance and excessive emissions. By weakening or eliminating fluctuations, the air-fuel ratio control can be stabilized, the combustion efficiency can be improved, the emission of harmful gases can be reduced, and the catalyst can be protected to ensure its efficient conversion of emissions. The implementation of this control method helps to improve the overall performance and environmental performance of the engine, meets the requirements of modern environmental regulations, and is of great significance for automobiles and other engine applications.

[0116] The process of correcting the oil circuit system based on the oscillation intensity of this embodiment is further described below.

[0117] As an optional implementation method, step S106 corrects the oil circuit system at least based on the oscillation intensity, including: correcting the oil circuit system based on the oscillation intensity, and the engine's intake flow and / or the oxygen storage performance index of the catalyst, wherein the catalyst is used to convert the gas generated during the combustion of the fuel in the engine, and the oxygen storage performance index is used to indicate the quality of the oxygen storage performance of the catalyst.

[0118] In this embodiment, in the process of correcting the oil circuit system at least based on the oscillation intensity, the oil circuit system can be corrected based on the oscillation intensity and the intake flow rate of the engine and / or the oxygen storage performance index of the catalyst. The catalyst can be used to convert the gas generated during the combustion of the fuel in the engine. The oxygen storage performance index can be used to indicate the quality of the oxygen storage performance of the catalyst, which can be the maximum oxygen storage capacity of the catalyst.

[0119] Optionally, factors such as engine air flow and maximum oxygen storage capacity of the catalyst are taken into account when modifying the model. These factors affect the combustion process and the effectiveness of emission control. Therefore, the model is modified based on these factors to improve the accuracy and performance of the system. The oscillation intensity level is determined based on the average amplitude and the number of oscillations, and the modified model is calculated based on this level. The system can better evaluate the fluctuation of the signal and make corresponding adjustments. The above intelligent control strategy can ensure the stable operation of the system, improve the combustion efficiency and emission performance of the engine, and thus achieve a more efficient and environmentally friendly engine working state.

[0120] Optionally, the entire control system performs judgment and correction under the current front oxygen closed loop. When exiting the closed loop, it will not be restricted by the control system, and re-judgment is required after re-entering the closed loop. The control system also does not restrict when there is a diagnosis request.

[0121] Optionally, during the discrimination and correction process under the current oxygen closed loop, the control system performs discrimination and correction under the current front oxygen sensor closed loop control, that is, the fuel injection is corrected according to the fluctuation level of the front oxygen sensor signal to maintain the stability of the air-fuel ratio. In the closed loop state, the system controls according to the feedback signal of the front oxygen sensor and adjusts the combustion efficiency by limiting the amount of fuel injection. However, once the closed loop state is exited, the system will no longer be subject to this restriction, and the amount of fuel injection may be affected by other factors. Therefore, when entering the closed loop state again, the system needs to re-perform discrimination and correction, re-evaluate the level of oscillation intensity according to the current working state, and adjust the amount of fuel injection accordingly.

[0122] Optionally, when the system receives a diagnostic request, the control system does not limit. This means that when the system receives a diagnostic request, it may be necessary to diagnose and repair the system fault, and the fluctuation of the front oxygen sensor signal will not be limited. This ensures that the system is not affected by other factors when performing diagnosis and maintenance, so as to better identify and solve problems.

[0123] In the embodiment of the present invention, the operation and control mode of the control system are clearly defined through the above two settings, ensuring that the control system can be controlled and adjusted accordingly according to actual conditions in closed-loop and open-loop states. These settings help the control system maintain stable and efficient operation in different working states, while ensuring the smooth progress of diagnosis and maintenance work.

[0124] The following further describes the process of how to correct the oil circuit system according to the correction instruction in this embodiment.

[0125] As an optional embodiment, the method further includes: in response to receiving a correction instruction, correcting the oil circuit system according to correction data corresponding to the correction instruction.

[0126] In this embodiment, when a correction instruction is received, the oil circuit system can be corrected according to the correction data corresponding to the correction instruction. The correction data can be the size of the calculated value obtained by diagnosing the correction of the oil circuit system to be corrected.

[0127] Optionally, when a correction instruction is received, the oil circuit system can be corrected according to the correction data corresponding to the correction instruction. When the control system of the engine receives the correction instruction, the operating parameters of the oil circuit system can be adjusted according to the correction data contained in the correction instruction. For example, the correction instruction may include parameters such as the amount of fuel injection, injection timing, and injection duration that need to be adjusted in order to optimize the engine combustion process. This is only an example and is not specifically limited.

[0128] Optionally, according to the correction data in the correction instruction, the engine control system will make corresponding adjustments to the oil circuit system. This may involve adjusting the working timing, injection amount, injection angle and other parameters of the fuel injector. By adjusting the oil circuit system according to the correction data, the fuel injection process can be optimized, and the combustion efficiency and stability of emission control can be improved. According to the correction data in the correction instruction, the adjustment parameters of the oil circuit system are applied to the actual operation. This may involve adjusting the parameters such as the opening timing, closing timing and injection amount of the fuel injector. By implementing the correction, the oil circuit system can work according to the requirements specified by the correction data, thereby optimizing and controlling the combustion process. By adjusting the oil circuit system according to the correction data in the correction instruction, the combustion process can be optimized, the combustion efficiency can be improved, and the generation of emissions can be reduced, while ensuring the performance and environmental performance of the engine. The accuracy and effectiveness of the correction data are crucial to ensure that the adjustment of the oil circuit system meets the requirements and improves the working efficiency and environmental performance of the engine.

[0129] In summary, when a correction instruction is received, the oil circuit system is adjusted according to the correction data in the correction instruction, which can optimize the combustion process of the engine and improve performance and environmental protection performance. The above method helps to ensure the normal operation and stability of the engine and realize precise control of the combustion process.

[0130] The following further describes the process of how to use the second target signal collected by the rear oxygen sensor to correct the oil circuit system in this embodiment.

[0131] As an optional embodiment, the control system also includes a rear oxygen sensor, and the method also includes: acquiring a second target signal collected by the rear oxygen sensor, wherein the second target signal is used to characterize the oxygen content of the converted gas generated during the combustion of the fuel in the engine; performing feedback control on the rear oxygen sensor using the second target signal according to a feedback control strategy, wherein the feedback control strategy is used to represent a rule for performing feedback control on the rear oxygen sensor; and correcting the oil circuit system using the controlled rear oxygen sensor.

[0132] In this embodiment, the control system may also include a rear oxygen sensor. A second target signal collected by the rear oxygen sensor may be obtained. The second target signal may be used to perform feedback control on the rear oxygen sensor according to the feedback control strategy. The oil circuit system may be corrected using the controlled rear sensor. The second target signal may be used to represent the oxygen content of the converted gas generated during the combustion of the fuel in the engine, and may also be referred to as a rear oxygen sensor signal. The feedback control strategy may be used to represent the rules for feedback control of the rear oxygen sensor, for example, it may be proportional-integral-derivative (PID) control or proportional-integral (PI) control.

[0133] Optionally, in an embodiment of the present invention, in addition to correcting the fuel injection according to the oscillation level of the front oxygen sensor, the system will also use the PID adjustment function of the rear oxygen sensor to assist in correcting the fuel injection. The rear oxygen sensor can monitor the oxygen content in the exhaust gas, perform feedback adjustment according to the actual combustion situation, and further optimize the air-fuel ratio control. By correcting the amount of fuel injection, it can be ensured that the catalyst is in the high-efficiency conversion range, improve the conversion efficiency of harmful gases, and reduce the generation of emissions. This helps to protect the working state of the catalyst, extend its service life, and reduce the impact on the environment. By feeding back the corrected fuel injection signal to the front oxygen sensor, the system forms a closed-loop control system. The front oxygen sensor monitors the change of the air-fuel ratio, and the system adjusts the amount of fuel injection according to the feedback signal to achieve stable control of the air-fuel ratio. This closed-loop control system can ensure that the combustion efficiency and emission performance of the engine are running in a good state.

[0134] In summary, the fuel injection can be corrected according to the vibration level of the front oxygen sensor, and the PID adjustment function of the rear oxygen sensor can be combined to effectively optimize the combustion control and improve the efficiency and emission performance of the engine. This intelligent correction strategy helps to ensure the normal operation of the engine, reduce the emission of emissions, and improve the conversion efficiency of the catalyst, thereby achieving environmentally friendly and efficient engine operation.

[0135] Optionally, in the PID adjustment of the rear oxygen sensor, in addition to adjusting the working state of the rear oxygen sensor itself, the fuel injection correction will also be assisted to ensure the efficient conversion range of the catalyst. This adjustment and correction process forms a closed-loop control system, which achieves system stability and performance optimization through continuous feedback signals and adjustments.

[0136] Optionally, the PID adjustment of the rear oxygen sensor is mainly adjusted for the working state of the sensor itself to ensure that the sensor can accurately monitor the oxygen content in the exhaust gas and provide feedback information to the control system. The PID controller can adjust the output of the sensor according to the deviation of the sensor feedback signal so that the measured value of the sensor is as close to the expected value as possible, thereby maintaining the accuracy and stability of the sensor. During the PID adjustment process of the rear oxygen sensor, the injection correction will be assisted according to the feedback signal of the sensor. The purpose of the injection correction is to adjust the mixing ratio of fuel and air to ensure that the oxygen content during the engine combustion process is within the efficient conversion range of the catalyst. Through the correction of the injection, the combustion efficiency can be optimized, the stability of the emission control can be improved, and the efficient operation of the catalyst can be ensured. A closed-loop control system is formed by the PID adjustment of the rear oxygen sensor and the correction of the injection. This system realizes the coordinated work between the sensor, the injection system and the catalyst through continuous feedback signals and adjustments to ensure the stability and efficient performance of the entire system. The feedback signal after the injection correction will be returned to the front oxygen sensor, forming a closed-loop control cycle to ensure that the control system can maintain a stable combustion state and emission control under different working conditions.

[0137] Optionally, the oil circuit can be fine-tuned through post-oxygen PI control to make combustion more stable and reduce the emission of harmful gases. At the same time, through the post-oxygen self-learning function, the control system can be adaptively adjusted according to the actual operating conditions to improve the conversion efficiency of the three-way catalytic converter and further reduce the emission of emissions.

[0138] In an embodiment of the present invention, in order to avoid the oscillation phenomenon of the engine caused by the front oxygen sensor, the first target signal collected by the front oxygen sensor can be obtained, and the signal is used to characterize the combustion degree of the fuel in the engine during the combustion process. The signal of the front oxygen sensor reflects the change of the oxygen content in the exhaust gas, which can help the control system adjust the mixing ratio of fuel and air. The oscillation intensity of the first target signal can be determined to characterize the fluctuation degree of the signal. The determination of the oscillation intensity can help evaluate the stability and accuracy of the first target signal. Based on the oscillation intensity, the oil circuit system in the control system can be corrected to inject the fuel corresponding to the oscillation intensity to the engine. Adjusting the fuel injection amount according to the signal fluctuation degree can improve the combustion efficiency and reduce the generation of emissions. The feedback signal of the corrected oil circuit system is output to the front oxygen sensor to update the first target signal using the feedback signal. Through feedback control, the fuel supply can be continuously optimized to improve the combustion efficiency and emission control performance of the engine. In this embodiment, by processing and correcting the first target signal of the front oxygen sensor, the oil circuit system can be adjusted according to the real-time combustion situation to improve the combustion efficiency and the accuracy of emission control. Through the feedback control mechanism, the fuel supply can be continuously updated to keep the engine in a stable combustion state under different working conditions and reduce the generation of emissions. By reducing the oscillation intensity of the first target signal, the stability of the control system can be improved, and the uncertainty caused by system oscillation can be reduced, thereby improving the performance and reliability of the control system, thereby achieving the technical effect of improving the signal processing effect of the engine and solving the technical problem of poor signal processing effect of the engine.

[0139] The technical solution of the embodiment of the present invention is illustrated below in conjunction with preferred implementation modes.

[0140] At present, with the upgrading of emission regulations, the emission restrictions on engines under different operating conditions are becoming increasingly stringent. For equivalent combustion engines, the amount of emissions depends on the accuracy of the air-fuel ratio control of the entire closed-loop system. Since the feedback signal of the engine closed-loop control system comes from the front oxygen sensor, when the oxygen sensor signal deviates or fails due to its own reasons or external interference, it will bring uncertain negative effects to the control of the entire closed-loop system, resulting in poor air-fuel ratio stability, poor emissions, and increased emissions.

[0141] Therefore, the above method still has the technical problem of poor signal processing effect of the engine.

[0142] However, an embodiment of the present invention proposes a control method for the engine wide-range oxygen sensor signal when it is oscillating, so as to weaken or eliminate the fluctuation and oscillation of the air-fuel ratio when the front oxygen sensor has deviations or failures, thereby improving the stability of the closed-loop control of the front oxygen sensor, and further improving the engine emission performance. The key to this method is to design an intelligent closed-loop control system that can detect the deviation or failure of the front oxygen sensor signal in a timely manner, and adopt corresponding control strategies to adjust the fuel injection amount to maintain a suitable air-fuel ratio. Specifically, when the system detects that the front oxygen sensor signal is abnormal, it can be compensated by introducing a spare sensor or using the information of other sensors, so that the closed-loop control system can continue to effectively control the air-fuel ratio. In addition, advanced control algorithms such as fuzzy logic control and PID control can also be adopted to optimize the control strategy and improve the response speed and stability of the system.

[0143] In summary, by adopting the closed-loop control method provided by the embodiment of the present invention, the fluctuation of the air-fuel ratio when the front oxygen sensor deviates or fails can be effectively weakened or eliminated, and the stability of the closed-loop control of the front oxygen sensor is improved. This will help reduce the emission of engine emissions and improve emission performance, while also improving the robustness and reliability of the engine. In turn, the technical effect of improving the signal processing effect of the engine is achieved, and the technical problem of poor signal processing effect of the engine is solved.

[0144] The method of the embodiment of the present invention is further illustrated below.

[0145] In this embodiment, Figure 2 FIG. 1 is a flow chart of a control method for a wide-band oxygen sensor signal of an engine when oscillation occurs according to an embodiment of the present invention. Figure 2 As shown, the method may include the following steps:

[0146] Step S202: construct a front oxygen sensor oscillation strength model, and calculate the signal oscillation strength by collecting oxygen sensor signals.

[0147] In this embodiment, the front oxygen sensor oscillation strength model is constructed by collecting oxygen sensor signals and performing signal processing. By calculating the oscillation strength of the signal, it is possible to evaluate whether the working state of the front oxygen sensor is normal, so as to adjust the subsequent control strategy.

[0148] Step S204, restricting the oil system to different degrees according to the shock intensity.

[0149] In this embodiment, the oil circuit system is restricted to different degrees according to the vibration intensity of the front oxygen sensor. When the front oxygen sensor signal is deviated or fails, by applying appropriate restrictions to the oil circuit system, the fluctuation range of the air-fuel ratio can be effectively reduced, the combustion efficiency can be kept stable, and the emission performance can be improved.

[0150] Step S206: further restricting the control system according to the load of the engine and the aging degree of the catalyst.

[0151] In this embodiment, in addition to considering the vibration intensity of the front oxygen sensor, the control system can be further restricted according to factors such as the load of the engine operation and the aging degree of the catalyst, etc. This can more accurately adjust the fuel injection amount, optimize the air-fuel ratio control, and improve the emission performance of the engine.

[0152] Step S208, the post-oxygen PI control fine-tunes the oil circuit and performs post-oxygen self-learning to improve the conversion efficiency of the three-way catalytic converter.

[0153] In this embodiment, the oil circuit is fine-tuned through post-oxygen PI control to make combustion more stable and reduce the emission of harmful gases. At the same time, through the post-oxygen self-learning function, the control system can be adaptively adjusted according to the actual operating conditions to improve the conversion efficiency of the three-way catalytic converter and further reduce the emission of emissions.

[0154] Step S210, after the fuel injection correction, the optimized air-fuel ratio and emission performance are obtained through the front oxygen sensor signal.

[0155] In this embodiment, the corrected fuel injection amount is obtained through the front oxygen sensor signal, thereby achieving optimal control of the air-fuel ratio and improving the emission performance of the engine. This can effectively deal with the air-fuel ratio fluctuation caused by the deviation or failure of the front oxygen sensor and ensure the stability and excellence of the engine emission performance.

[0156] In the embodiment of the present invention, in the above method, comprehensive optimization and improvement of engine emission performance is achieved by comprehensively considering factors such as the working state of the front oxygen sensor, the limitation of the oil system, the engine load and the aging degree of the catalyst.

[0157] Figure 3 FIG. 1 is a schematic diagram of a closed loop circuit of a wide-range oxygen sensor signal of an engine when oscillation occurs according to an embodiment of the present invention. Figure 3 As shown, the following steps may be included:

[0158] Step S301, collecting the front oxygen sensor signal.

[0159] In this embodiment, the exhaust air-fuel ratio is collected by the front oxygen sensor signal to reflect the air-fuel ratio of the exhaust system and the degree of combustion of the mixture in the engine cylinder.

[0160] Optionally, the air-fuel ratio of the exhaust system can be reflected by the front oxygen sensor signal, which can help the engine control system monitor the status of the engine combustion process in real time. If the air-fuel ratio deviates from the ideal value, it may lead to reduced combustion efficiency and more harmful emissions. Therefore, accurate collection of exhaust air-fuel ratio information is crucial to engine performance and emission control.

[0161] Step S302, determining whether the front oxygen sensor signal is oscillating and determining the oscillation intensity.

[0162] In this embodiment, calculating the oscillation intensity of the signal according to the fluctuation of the front oxygen sensor signal is an important signal analysis method, which can help identify and evaluate the stability and accuracy of the front oxygen sensor signal.

[0163] Optionally, by monitoring the fluctuation of the front oxygen sensor signal, different methods can be used to calculate the oscillation strength of the signal. A common method is to evaluate the oscillation strength of the signal by calculating the integral area and amplitude of the signal. According to the fluctuation of the front oxygen signal, it can be determined whether the signal is a unidirectional oscillation or a bidirectional oscillation. Unidirectional oscillation refers to the fluctuation of the signal in one direction, while bidirectional oscillation refers to the fluctuation in two directions. The oscillation intensity level of the signal is determined by the model, and the oscillation intensity of the signal can be divided into different levels according to the calculation results of the integral area and amplitude. This helps the system to more accurately judge the stability and accuracy of the signal.

[0164] In the embodiment of the present invention, by calculating and analyzing the oscillation intensity of the front oxygen sensor signal, the engine control system can be helped to timely detect abnormal fluctuations in the signal and then take corresponding control measures. This helps to maintain the combustion efficiency of the engine, reduce the emission of harmful gases, and improve the performance and environmental performance of the engine. Therefore, calculating the oscillation intensity of the signal based on the fluctuation size of the front oxygen signal is an effective signal processing method, which is of great significance for the stable operation and emission control of the engine.

[0165] Optionally, the integral within the calibration time is calculated based on the oxygen sensor signal as one of the conditions for judging the oscillation intensity.

[0166] Optionally, the integral result can be determined by the following formula:

[0167]

[0168] in, It can be used to express the result of integration, that is, the integrated area; Can be used to indicate sampling period; Can be used to indicate the air-fuel ratio.

[0169] Alternatively, the average amplitude may be determined by the following formula:

[0170]

[0171] in, Can be used to represent the average magnitude, that is, the average amplitude.

[0172] Optionally, during the calibration time, the alternating oscillation of the signal is determined by the thresholds of the rich end and the lean end. By calculating the number of lean end crossings nl and the number of rich end crossings nr, the number of times the signal alternately oscillates can be evaluated. When the number of crossings of the lean end and the rich end is greater than a certain value, it can be determined that the system is oscillating. The above calculation method can help further confirm the oscillation intensity of the signal and serve as an important basis for judging system oscillation.

[0173] In summary, the above calculation method combines the calculation of integration, average amplitude and number of oscillations, and provides an effective means to judge the stability and accuracy of the signal by comprehensively evaluating the fluctuation of the front oxygen sensor signal. This helps to detect abnormal signal fluctuations in time and take corresponding control measures to ensure the normal operation and emission performance of the engine.

[0174] Step S303: the sensor diagnoses whether to correct the signal.

[0175] In this embodiment, it is determined whether a diagnostic correction is required. If the system detects that the front oxygen sensor signal is abnormal or fluctuating, a diagnostic program may be triggered to detect and diagnose the problem. If the system finds that correction is required after diagnosis, the post-diagnosis calculation will be performed, that is, the system will be adjusted and corrected according to the diagnosis results. If it is determined that correction is required, step S306 can be executed, otherwise, step S305 can be executed.

[0176] Optionally, if the system determines that no diagnostic correction is needed, that is, the front oxygen sensor signal fluctuation is not caused by a system failure, but is caused by normal fluctuations or other reasons, then the system will calculate the correction model. In this case, the system will correct and adjust the model based on the previously calculated oscillation intensity level and other parameters to better adapt to the current working conditions and signal fluctuations.

[0177] Optionally, by determining whether there is a diagnostic correction and performing corresponding processing according to the situation, abnormal fluctuations in the front oxygen sensor signal can be handled more intelligently to ensure the stability and accuracy of the system. Diagnostic correction can help the system to detect and solve problems in a timely manner and reduce the uncertainty caused by faults; while the correction model calculation for normal fluctuations can optimize the control strategy and improve the efficiency and performance of the system. Overall, this intelligent judgment and processing method helps to ensure the stable operation and accuracy of the front oxygen sensor control system.

[0178] Step S304, modifying the model using the calculated value obtained after diagnosis.

[0179] In this embodiment, when the system performs diagnostic correction, the system will correct the model according to the size of the diagnostic calculation value. This means that the system will adjust the parameters or structure of the model according to the specific values ​​obtained by the diagnosis to more accurately reflect the actual situation of the front oxygen sensor signal. The size of the diagnostic calculation value may reflect the abnormality of the signal or the severity of the system failure, and the system can make corresponding adjustments based on this information.

[0180] Correcting the model based on the size of the diagnostic calculation value can more accurately adapt to the current working state and environmental conditions, thereby improving the stability and accuracy of the system. By timely adjusting the model based on the diagnostic results, the system can more effectively respond to abnormal fluctuations or failures in the front oxygen sensor signal, ensure the normal operation of the system and improve the performance of the control system.

[0181] Step S305, performing correction model calculation according to the vibration intensity, engine flow, maximum oxygen storage capacity of the catalyst, etc.

[0182] In this embodiment, when there is no diagnostic correction, the system will determine the oscillation intensity level of the signal by averaging the amplitude and the number of oscillations to calculate the correction model.

[0183] Optionally, the oscillation intensity of the signal is evaluated by calculating the average amplitude and the number of oscillations. The larger the amplitude and the more oscillations, the more obvious the fluctuation of the signal and the greater the oscillation intensity. Through the comprehensive consideration of these two parameters, the system can determine the oscillation intensity level of the signal, and then further process or adjust the signal. According to the determined oscillation intensity level, the correction model is calculated. According to the magnitude of the oscillation intensity, the system may make corresponding adjustments to the parameters or structure of the model to adapt to different working conditions and signal fluctuations. In particular, the restriction correction of the oil circuit may be adjusted to varying degrees according to the magnitude of the oscillation intensity to ensure the stability of combustion efficiency and emission performance.

[0184] Optionally, factors such as engine air flow and maximum oxygen storage capacity of the catalyst are taken into account when modifying the model. These factors affect the combustion process and the effectiveness of emission control. The model can be modified based on these factors to improve the accuracy and performance of the system. The correction model is calculated based on the oscillation intensity level determined based on the average amplitude and the number of oscillations, which can better evaluate the fluctuation of the signal and make corresponding adjustments.

[0185] Step S306, correcting the oil injection of the oil system.

[0186] In this embodiment, the fuel injection amount can be adjusted and corrected accordingly based on the evaluation result of the front oxygen sensor oscillation level. By limiting the amplitude and frequency of the fuel injection correction, the oscillation intensity of the system can be reduced, ensuring that the air-fuel ratio is within a stable range, and improving the combustion efficiency and emission performance.

[0187] Step S307, collecting the rear oxygen sensor signal.

[0188] In this embodiment, in addition to correcting the injection according to the oscillation level of the front oxygen sensor, the rear oxygen sensor can be used to perform corrections. The oxygen content in the exhaust gas can be monitored, and feedback adjustment can be performed according to the actual combustion situation to further optimize the air-fuel ratio control.

[0189] Step S308: rear oxygen sensor PID control.

[0190] In this embodiment, the PID adjustment function of the rear oxygen sensor can be used to assist in the correction of fuel injection.

[0191] Step S309, modifying the model using the calculated value obtained after diagnosis.

[0192] In this embodiment, by correcting the injection amount, it is possible to ensure that the catalyst is in a high-efficiency conversion range, improve the conversion efficiency of harmful gases, and reduce the generation of emissions. This helps to protect the working state of the catalyst, extend its service life, and reduce the impact on the environment.

[0193] In an embodiment of the present invention, a closed-loop control system is formed by feeding back the corrected fuel injection signal to the front oxygen sensor. The front oxygen sensor monitors the change of the air-fuel ratio, and the system adjusts the fuel injection amount according to the feedback signal to achieve stable control of the air-fuel ratio. This closed-loop control system can ensure that the combustion efficiency and emission performance of the engine are running in a good state. By correcting the fuel injection according to the oscillation level of the front oxygen sensor and combining the PID adjustment function of the rear oxygen sensor, the combustion control can be effectively optimized to improve the efficiency and emission performance of the engine. This intelligent correction strategy helps to ensure the normal operation of the engine, reduce the emission of emissions, and at the same time improve the conversion efficiency of the catalyst, thereby achieving an environmentally friendly and efficient engine operation state.

[0194] Optionally, the judgment correction is performed under the closed-loop control system. After exiting the closed loop, it will not be restricted by the control system, and re-judgment is required after re-entering the closed loop. The control system also does not restrict when there is a diagnosis request.

[0195] In the existing closed-loop control system, when the oxygen sensor has deviation or failure, the front oxygen closed-loop control will produce oscillations without diagnostic processing. Such oscillations will deteriorate the original exhaust of the engine and reduce the conversion efficiency of the catalyst, resulting in serious excess of emissions. However, in an embodiment of the present invention, a closed-loop control method for the front oxygen sensor of the engine is provided, which can reduce or eliminate the fluctuation of the air-fuel ratio when the front oxygen sensor has deviation or failure, improve the stability of the closed-loop control of the front oxygen sensor, and help improve the robustness of engine emissions and improve engine emission performance.

[0196] In an embodiment of the present invention, a control system is established for the front oxygen closed-loop control oscillation caused by deviation, failure or other conditions of the front oxygen sensor. The system uses a model to calculate the oscillation intensity of the system, and corrects and limits the fuel system according to the oscillation intensity, thereby reducing the compensation of the oil circuit. The above control strategy can significantly reduce exhaust emissions, especially in the vehicle range-extending system, and the improvement effect on emission performance is obvious. By establishing an oscillation intensity model of the system, the fluctuation of the front oxygen sensor signal can be more accurately evaluated, and the oscillation phenomenon can be discovered and responded to in a timely manner. By correcting and limiting the fuel system, the system can effectively reduce the compensation amount of the oil circuit, stabilize the air-fuel ratio control, improve combustion efficiency, and reduce the emission of harmful gases. Especially in the vehicle range-extending system, the application of this control strategy has a more significant effect on improving emission performance, which helps to reduce the emission level of the vehicle and improve environmental performance.

[0197] In summary, this embodiment provides an effective method and control system that can address the problem of closed-loop control oscillation of the front oxygen sensor and reduce the emission of exhaust emissions, especially in the vehicle range-extending system, which has a significant effect on improving emission performance. This is of great significance for improving the environmental performance of the engine and meeting the requirements of emission regulations. Thereby achieving the technical effect of improving the signal processing effect of the engine and solving the technical problem of poor signal processing effect of the engine.

[0198] According to another aspect of the embodiment of the present invention, corresponding to the embodiment of the signal processing method of the engine, the present specification also provides a control system of the engine, Figure 4 is a system block diagram of a control system of an engine according to an embodiment of the present invention. Figure 4 As shown, the control system 400 of the engine may include: a front oxygen sensor 402 and an oil circuit system 404 .

[0199] The front oxygen sensor 402 is used to collect a first target signal, wherein the first target signal is used to characterize the degree of combustion of the fuel in the engine during the combustion process.

[0200] The oil circuit system 404 is used to perform correction based on the oscillation intensity of the first target signal and output a feedback signal to the front oxygen sensor, wherein the oscillation intensity is used to characterize the degree of fluctuation of the first target signal. The corrected oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine, and the feedback signal is used to update the first target signal collected by the front oxygen sensor, and the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

[0201] In the control system of the engine of this embodiment, in order to avoid the oscillation phenomenon of the engine caused by the front oxygen sensor, the first target signal collected by the front oxygen sensor can be obtained, and the signal is used to characterize the combustion degree of the fuel in the engine during the combustion process. The signal of the front oxygen sensor reflects the change of the oxygen content in the exhaust gas, which can help the control system adjust the mixing ratio of fuel and air. The oscillation intensity of the first target signal can be determined to characterize the fluctuation degree of the signal. The determination of the oscillation intensity can help evaluate the stability and accuracy of the first target signal. Based on the oscillation intensity, the oil circuit system in the control system can be corrected to inject the fuel corresponding to the oscillation intensity to the engine. Adjusting the fuel injection amount according to the signal fluctuation degree can improve the combustion efficiency and reduce the generation of emissions. The feedback signal of the corrected oil circuit system is output to the front oxygen sensor to update the first target signal using the feedback signal. Through feedback control, the fuel supply can be continuously optimized to improve the combustion efficiency and emission control performance of the engine. In this embodiment, by processing and correcting the first target signal of the front oxygen sensor, the oil circuit system can be adjusted according to the real-time combustion situation to improve the combustion efficiency and the accuracy of emission control. Through the feedback control mechanism, the fuel supply can be continuously updated to keep the engine in a stable combustion state under different working conditions and reduce the generation of emissions. By reducing the oscillation intensity of the first target signal, the stability of the control system can be improved, and the uncertainty caused by system oscillation can be reduced, thereby improving the performance and reliability of the control system, thereby achieving the technical effect of improving the signal processing effect of the engine and solving the technical problem of poor signal processing effect of the engine.

[0202] According to another aspect of the embodiment of the present invention, corresponding to the embodiment of the above-mentioned engine signal processing method, this specification also provides an engine signal processing device, Figure 5 is a structural block diagram of a signal processing device for an engine according to an embodiment of the present invention. Figure 5 As shown, the signal processing device 500 of the engine may include: an acquisition unit 502 , a determination unit 504 , a correction unit 506 and an output unit 508 .

[0203] The acquisition unit 502 is used to acquire a first target signal collected by the front oxygen sensor, wherein the first target signal is used to represent the combustion degree of the fuel in the engine during the combustion process.

[0204] The determination unit 504 is configured to determine the oscillation strength of the first target signal, wherein the oscillation strength is used to characterize the fluctuation degree of the first target signal.

[0205] The correction unit 506 is used to correct the oil circuit system at least based on the oscillation intensity, wherein the corrected oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine.

[0206] The output unit 508 is used to output the corrected feedback signal of the oil circuit system to the front oxygen sensor, so as to update the first target signal collected by the front oxygen sensor using the feedback signal, wherein the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

[0207] In this embodiment, the following units are provided in the signal processing device 500 of the engine: an acquisition unit 502, used to acquire the first target signal collected by the front oxygen sensor, wherein the first target signal is used to characterize the combustion degree of the fuel in the engine during the combustion process; a determination unit 504, used to determine the oscillation intensity of the first target signal, wherein the oscillation intensity is used to characterize the fluctuation degree of the first target signal; a correction unit 506, used to correct the oil circuit system at least based on the oscillation intensity, wherein the corrected oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine; an output unit 508, used to output the feedback signal of the corrected oil circuit system to the front oxygen sensor, so as to update the first target signal collected by the front oxygen sensor using the feedback signal, wherein the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update. Thus, the technical effect of improving the signal processing effect of the engine is achieved, and the technical problem of low signal processing effect of the engine is solved.

[0208] According to another aspect of an embodiment of the present invention, a vehicle is provided, which may be an autonomous driving vehicle, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes any one of the above methods when running.

[0209] Figure 6 is a structural block diagram of an automatic driving vehicle according to an embodiment of the present invention. Figure 6 As shown, the components of the autonomous driving vehicle 600 include but are not limited to a memory 610 and a processor 620. The processor 620 is connected to the memory 610 via a bus 630, and the database 650 is used to store data.

[0210] The autonomous vehicle 600 may also include an access device 640 that enables the autonomous vehicle 600 to communicate via one or more networks 650. Examples of these networks include a Public Switched Telephone Network (PSTN), a Local Area Network (LAN), a Wide Area Network (WAN), a Personal Area Network (PAN), or a combination of communication networks such as the Internet. The access device 640 may include one or more of any type of network interface (e.g., a network interface controller (NIC)) of wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a Worldwide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a Universal Serial Bus (USB) interface, a cellular network interface, a Bluetooth interface, a Near Field Communication (NFC) interface, and the like.

[0211] In one embodiment of the present disclosure, the above components of the autonomous driving vehicle 600 and Figure 6 Other components not shown in the figure may also be connected to each other, for example, via a bus. It should be understood that Figure 6 The structure block diagram of the autonomous driving vehicle shown is for illustrative purposes only and is not intended to limit the scope of the present disclosure. Those skilled in the art may add or replace other components as needed.

[0212] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium including a stored executable program, wherein when the executable program runs, the device where the storage medium is located is controlled to execute any one of the above methods.

[0213] According to another aspect of an embodiment of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, any one of the above methods is implemented.

[0214] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0215] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of units can be a logical function division, and there can be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0216] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0217] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0218] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, 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. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk, etc., and other media that can store program codes.

[0219] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A signal processing method for an engine, characterized in that: A control system applied to an engine, the control system at least comprising: a front oxygen sensor and an oil circuit system, the method comprising: Acquire a first target signal collected by the front oxygen sensor, wherein the first target signal is used to represent the degree of combustion of fuel in the engine during the combustion process; determining an oscillation intensity of the first target signal, wherein the oscillation intensity is used to characterize a degree of fluctuation of the first target signal; At least based on the oscillation intensity, the oil circuit system is modified, wherein the modified oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine; The corrected feedback signal of the oil circuit system is output to the front oxygen sensor, so as to use the feedback signal to update the first target signal collected by the front oxygen sensor, wherein the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

2. The method according to claim 1, characterized in that The oscillation intensity includes an oscillation intensity level, and the oscillation intensity level is positively correlated with the degree of correction of the oil circuit system. Determining the oscillation intensity of the first target signal includes: In response to the first target signal being in an oscillating state, the oscillation intensity level of the first target signal is determined.

3. The method according to claim 2, characterized in that The method further comprises: determining a magnitude of an air-fuel ratio corresponding to the first target signal within a sampling period, wherein the air-fuel ratio is used to represent a weight ratio between the air in the engine and the fuel in the engine during the combustion process of the fuel in the engine, and the weight ratio is associated with the degree of combustion; Based on the amplitude, it is determined that the first target signal is in the oscillating state.

4. The method according to claim 3, characterized in that Determining, based on the amplitude, that the first target signal is in the oscillating state includes: Determining a first number of times that the amplitude exceeds a first amplitude threshold value and a second number of times that the amplitude exceeds a second amplitude threshold value within the sampling period, wherein the first amplitude threshold value and the second amplitude threshold value are used to characterize a predetermined leanness range of the fuel in the engine in the mixture in the engine, and the second amplitude threshold value is greater than the first amplitude threshold value; In response to the first number being greater than a number threshold and the second number being greater than the number threshold, it is determined that the first target signal is in the oscillating state.

5. The method according to claim 4, characterized in that In response to the first number of times being greater than a number threshold, and the second number of times being greater than the number threshold, determining that the first target signal is in the oscillating state includes: In response to the amplitude alternately exceeding the first amplitude threshold and the second amplitude threshold within the sampling period, the first number of times is greater than the number threshold, and the second number of times is greater than the number threshold, it is determined that the first target signal is in the oscillating state.

6. The method according to claim 4, characterized in that Determining the oscillation intensity level of the first target signal includes: Determining an integral result of the air-fuel ratio within the sampling period; Based on the integration result, determining an average amplitude of the first target signal within the sampling period; The oscillation intensity level is determined based on the average amplitude, the first number of times, and the second number of times, wherein the average amplitude, the first number of times, the second number of times, and the oscillation intensity level are positively correlated.

7. The method according to claim 6, characterized in that Determining the vibration intensity level based on the average amplitude, the first number of times, and the second number of times includes: In response to not receiving a correction instruction for the front oxygen sensor, determining the oscillation intensity level based on the average amplitude, the first number and the second number, wherein the correction instruction is used to correct the first target signal collected by the front oxygen sensor.

8. The method according to claim 7, characterized in that The oil system is modified based on at least the oscillation intensity, including: The oil circuit system is corrected based on the oscillation intensity, as well as the intake flow rate of the engine and / or the oxygen storage performance index of the catalyst, wherein the catalyst is used to convert the gas generated during the combustion of the fuel in the engine, and the oxygen storage performance index is used to indicate the quality of the oxygen storage performance of the catalyst.

9. The method according to claim 7, characterized in that: The method further comprises: In response to receiving the correction instruction, the oil circuit system is corrected according to correction data corresponding to the correction instruction.

10. The method according to any one of claims 1 to 9, characterized in that The control system further includes a rear oxygen sensor, and the method further includes: Acquire a second target signal collected by the rear oxygen sensor, wherein the second target signal is used to characterize the oxygen content of the converted gas generated during the combustion of the fuel in the engine; performing feedback control on the rear oxygen sensor using the second target signal according to a feedback control strategy, wherein the feedback control strategy is used to represent a rule for performing feedback control on the rear oxygen sensor; The oil circuit system is corrected by using the controlled rear oxygen sensor.

11. An engine control system, characterized in that: The control system at least includes: a front oxygen sensor and an oil circuit system, wherein: The front oxygen sensor is used to collect a first target signal, wherein the first target signal is used to represent the degree of combustion of the fuel in the engine during the combustion process; The oil circuit system is used to perform correction based on the oscillation intensity of the first target signal and output a feedback signal to the front oxygen sensor, wherein the oscillation intensity is used to characterize the degree of fluctuation of the first target signal. The corrected oil circuit system is used to inject fuel of an amount corresponding to the oscillation intensity into the engine, and the feedback signal is used to update the first target signal collected by the front oxygen sensor, and the oscillation intensity of the updated first target signal is less than the oscillation intensity of the first target signal before the update.

12. A vehicle, characterized in that: include: A memory storing an executable program; A processor, configured to run the program, wherein the program executes the method according to any one of claims 1 to 10 when running.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored executable program, wherein when the executable program is executed, the device where the storage medium is located is controlled to execute the method according to any one of claims 1 to 10.

14. A computer program product, characterized in that It comprises a computer program which, when executed by a processor, implements the method according to any one of claims 1 to 10.

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