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

Abstract

The application discloses an engine signal processing method, a vehicle, a storage medium and a program product. The method is applied to a control system of an engine, and the control system at least comprises a front oxygen sensor and an oil circuit system. The method comprises the following steps: acquiring a first target signal collected by the front oxygen sensor; determining the oscillation intensity of the first target signal, wherein the oscillation intensity is used to represent the fluctuation degree of the first target signal; correcting the oil circuit system based on at least the oscillation intensity, wherein the corrected oil circuit system is used to inject fuel with an oil 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 by using the feedback signal, wherein the oscillation intensity of the updated first target signal is smaller than the oscillation intensity of the first target signal before the update. The application solves the technical problem of poor signal processing effect of the engine.

Description

TECHNICAL FIELD

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

[0002] At present, with the enhancement of environmental protection consciousness and the continuous upgrading of emission regulations, the emission control requirements of the engine of the vehicle under different working conditions become more and more strict. For equivalent combustion engine, the amount of its emissions directly depends on the accuracy of the air-fuel ratio control of the whole control system of the vehicle. The control system obtains the feedback signal of the oxygen content in the exhaust gas through the front oxygen sensor, so as to adjust the mixing ratio of fuel and air, so as to ensure that the engine reaches the combustion efficiency and emission control that meet the conditions.

[0003] However, when the front oxygen sensor fails or is disturbed by external interference, if there is no diagnosis processing, the feedback signal of the front oxygen sensor may deviate, resulting in the control failure of the whole control system, which may cause the control system to be unable to accurately adjust the mixing ratio of fuel and air, thereby affecting the combustion efficiency and emission control of the engine.

[0004] In the above case, the control system may appear unstable working state, resulting in unstable operation of the engine, and the working performance is decreased, and even the oscillation phenomenon is caused. The generation of the oscillation phenomenon will further aggravate the instability of the operation of the engine, which may cause the engine to lose control, and even cause failure. This uncertain negative influence will affect the performance and stability of the whole control system, which may cause the emission of the engine under different working conditions to increase, and affect the environmental protection performance. Therefore, there is still the technical problem of poor signal processing effect of the engine.

[0005] At present, no effective solution has been proposed for the above problems. SUMMARY

[0006] The embodiments of the present application provide a signal processing method of 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 an aspect of some embodiments of the present application, there is provided a method for signal processing of an engine, applied to a control system of the engine, the control system comprising at least: a front oxygen sensor and an oil circuit system, the method comprising: obtaining a first target signal collected by the front oxygen sensor, wherein the first target signal is used to represent a combustion degree of fuel in a combustion process in the engine; determining an oscillation intensity of the first target signal, wherein the oscillation intensity is used to represent a fluctuation degree of the first target signal; modifying the oil circuit system based on at least the oscillation intensity, wherein the modified oil circuit system is used to inject fuel of an oil amount corresponding to the oscillation intensity into the engine; and outputting a feedback signal of the modified 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, wherein an oscillation intensity of the updated first target signal is less than an oscillation intensity of the first target signal before the update.

[0008] Optionally, the oscillation intensity comprises an oscillation intensity level, the oscillation intensity level is positively correlated with a modification degree of the oil circuit system, and the method further comprises: in response to the first target signal being in an oscillation state, determining the oscillation intensity level of the first target signal.

[0009] Optionally, the method further comprises: determining an amplitude of an air-fuel ratio corresponding to the first target signal in a sampling period, wherein the air-fuel ratio is used to represent a weight ratio between air in the engine and fuel in the engine in the combustion process, and the weight ratio is associated with the combustion degree; and determining that the first target signal is in the oscillation state based on the amplitude.

[0010] Optionally, the determining that the first target signal is in the oscillation state based on the amplitude comprises: determining a first number of times that the amplitude exceeds a first amplitude threshold in the sampling period, and a second number of times that the amplitude exceeds a second amplitude threshold in the sampling period, wherein the first amplitude threshold and the second amplitude threshold are used to represent a predetermined lean-rich degree range of the fuel in the mixture in the engine, and the second amplitude threshold is greater than the first amplitude threshold; and 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 oscillation state.

[0011] Optionally, the determining that the first target signal is in the oscillation state in response to the first number of times being greater than the number threshold and the second number of times being greater than the number threshold comprises: in response to the amplitude alternatingly exceeding the first amplitude threshold and the second amplitude threshold in the sampling period, the first number of times being greater than the number threshold, and the second number of times being greater than the number threshold, determining that the first target signal is in the oscillation state.

[0012] Optionally, the determining the oscillation intensity level of the first target signal comprises: determining an integral result of the air-fuel ratio in the sampling period; determining an average amplitude of the first target signal in the sampling period based on the integral result; and determining the oscillation intensity level based on the average amplitude, the first frequency and the second frequency, wherein the average amplitude, the first frequency and the second frequency are in positive correlation with the oscillation intensity level.

[0013] Optionally, the determining the oscillation intensity level based on the average amplitude, the first frequency and the second frequency comprises: 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 frequency and the second frequency, wherein the correction instruction is used to correct the first target signal collected by the front oxygen sensor.

[0014] Optionally, the correcting the fuel supply system based on at least the oscillation intensity comprises: correcting the fuel supply system based on the oscillation intensity, an intake flow of the engine and / or an oxygen storage performance index of the catalyst, wherein the catalyst is used to convert the gas generated in the combustion process of the fuel in the engine, and the oxygen storage performance index is used to indicate the degree of the oxygen storage performance of the catalyst.

[0015] Optionally, the method further comprises: in response to receiving the correction instruction, correcting the fuel supply system according to the correction data corresponding to the correction instruction.

[0016] Optionally, the control system further comprises a rear oxygen sensor, and the method further comprises: obtaining a second target signal collected by the rear oxygen sensor, wherein the second target signal is used to indicate the oxygen content of the converted gas generated in the combustion process of the fuel in the engine; performing feedback control on the rear oxygen sensor according to a feedback control strategy using the second target signal, wherein the feedback control strategy is used to indicate the rule of the feedback control on the rear oxygen sensor; and correcting the fuel supply system using the controlled rear oxygen sensor.

[0017] According to another aspect of the embodiments of the present application, an engine signal processing device is further provided, comprising: an obtaining unit configured to obtain a first target signal collected by a front oxygen sensor, wherein the first target signal is used to indicate the combustion degree of the fuel in the engine in the combustion process; a determining unit configured to determine an oscillation intensity of the first target signal, wherein the oscillation intensity is used to indicate the fluctuation degree of the first target signal; a correcting unit configured to correct a fuel supply system based on at least the oscillation intensity, wherein the corrected fuel supply system is used to inject the fuel with an amount of fuel corresponding to the oscillation intensity into the engine; and an output unit configured to output a feedback signal of the corrected fuel supply 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 the embodiments of the present application, there is also provided a control system of an engine, comprising at least: a front oxygen sensor, configured to collect a first target signal, wherein the first target signal is used to represent a combustion degree of fuel in a combustion process of the engine; and an oil circuit system, configured to correct the first target signal according to a fluctuation intensity of the first target signal, and output a feedback signal to the front oxygen sensor, wherein the fluctuation intensity is used to represent a fluctuation degree of the first target signal, the corrected oil circuit system is configured to inject fuel with an amount corresponding to the fluctuation intensity into the engine, and the feedback signal is used to update the first target signal collected by the front oxygen sensor, and the fluctuation intensity of the updated first target signal is less than the fluctuation intensity of the first target signal before being updated.

[0019] According to another aspect of the embodiments of the present application, there is also provided a vehicle, comprising: a memory and a processor, wherein the memory stores an executable program; and the processor is configured to execute the program, wherein the program is configured to execute any of the above methods when executed.

[0020] According to another aspect of the embodiments of the present application, there is also provided a computer readable storage medium, comprising a stored program, wherein the program is configured to control a processor of a device to execute any of the above methods when executed.

[0021] According to another aspect of the embodiments of the present application, there is also provided an electronic device, comprising: one or more processors; and a memory configured to store one or more programs; wherein the one or more programs are configured to, when executed by the one or more processors, cause the one or more processors to perform any of the above methods.

[0022] In the embodiment of the present application, in order to avoid the oscillation phenomenon of the engine caused by the front oxygen sensor, a first target signal collected by the front oxygen sensor can be obtained, which is used to represent the combustion degree of the fuel in the combustion process in the engine. The signal of the front oxygen sensor reflects the change of the oxygen content in the exhaust gas, which can help the control system to adjust the mixing ratio of the fuel and air. The oscillation intensity of the first target signal can be determined, which is used to represent the fluctuation degree of the signal. The determination of the oscillation intensity can help to 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 oil amount of the oscillation intensity into the engine. According to the signal fluctuation degree, the fuel injection amount is adjusted, which 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 by using the feedback signal. Through feedback control, the fuel supply can be continuously optimized, and the combustion efficiency and emission control performance of the engine can be improved. 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 condition, and the combustion efficiency and the accuracy of emission control can be improved. Through the feedback control mechanism, the fuel supply can be continuously updated, so that the engine can maintain a stable combustion state under different working conditions, and the generation of emissions can be reduced. 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, and achieving the technical effect of improving the signal processing effect of the engine, solving the technical problem of poor signal processing effect of the engine. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0024] Figure 1 FIG. 1 is a flowchart of a signal processing method of an engine according to an embodiment of the present application;

[0025] Figure 2 FIG. 2 is a flowchart of a control method of an engine wide-range oxygen sensor signal when oscillation occurs according to an embodiment of the present application;

[0026] Figure 3 FIG. 3 is a schematic diagram of a closed loop when the engine wide-range oxygen sensor signal oscillates according to an embodiment of the present application;

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

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

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

[0030] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can 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 application, a method embodiment of signal processing of an engine is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0033] Figure 1 is a flowchart of a signal processing method of an engine according to an embodiment of the present application, as shown in Figure 1 The method is applied to a control system of an engine, and the control system at least includes a front oxygen sensor and an oil circuit system, and includes the following steps:

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

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

[0036] Alternatively, the front oxygen sensor can also be referred to as an oxygen sensor or an oxygen sensor. The front oxygen sensor is a sensor for measuring the oxygen content in the exhaust gas, and 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 referred to as the air-fuel ratio / exhaust air-fuel ratio).

[0037] Alternatively, the first target signal can be used to characterize the combustion degree of the fuel in the combustion process in the engine, which can also be referred to as 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 the combustion efficiency and emission control that meet the conditions under different working 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, the first target signal collected by the front oxygen sensor can be obtained, which can reflect the combustion process of the fuel in the combustion process in the engine.

[0039] Alternatively, in order to enable the control system of the engine to more comprehensively understand the condition of the combustion process, thereby adjusting the mixing ratio of fuel and air, optimizing the combustion process of fuel, improving the combustion efficiency, reducing the generation of emissions, and at the same time ensuring the performance and environmental performance of the engine, the first target signal can be collected by the front oxygen sensor.

[0040] Alternatively, the collection of the exhaust air-fuel ratio is to obtain the mixing ratio of air and fuel in the exhaust system through the front oxygen sensor signal, that is, the ratio of air to fuel. This ratio is very important for the combustion process of the engine and directly affects the efficiency of combustion and the quality of generated emissions. The front oxygen sensor is a sensor that can measure the oxygen concentration in the exhaust gas, which can sense the oxygen content in the exhaust gas and judge the mixing ratio of air and fuel according to the oxygen concentration. Under normal conditions, the front oxygen sensor will continuously monitor the oxygen concentration in the exhaust gas and feed back this information 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 mixing ratio.

[0041] The exhaust air-fuel ratio of the exhaust system can be reflected by the pre-oxygen sensor signal, which can help the engine control system to monitor the status of the engine combustion process in real time. If the air-fuel ratio deviates from the ideal value, it may cause the combustion efficiency to decrease and generate more harmful emissions. Therefore, accurately collecting information about the exhaust air-fuel ratio is crucial for the performance and emission control of the engine.

[0042] In the embodiments of the present application, through the collection and analysis of the pre-oxygen sensor signal, the air-fuel ratio in the exhaust system can be accurately monitored, which helps to adjust the engine combustion process, improve the combustion efficiency, reduce the generation of harmful emissions, and thus improve the performance and environmental performance of the engine.

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

[0044] In the technical solution provided by step S104 of the present application, the oscillation intensity can be used to represent the fluctuation degree of the first target signal, that is, it can be used to reflect the fluctuation degree of the air-fuel ratio, which can also be called signal oscillation intensity.

[0045] In this embodiment, after the first target signal is collected by the pre-oxygen sensor, the oscillation intensity of the first target signal can be determined according to the fluctuation size of the first target signal.

[0046] Alternatively, the pre-oxygen sensor is used to monitor the oxygen content in the exhaust gas and collect the first target signal which can represent the combustion degree of the fuel in the combustion process of the engine combustion process. The first target signal can be analyzed to determine the fluctuation size of the first target signal. The fluctuation size reflects the change degree of the first target signal, that is, the fluctuation degree of the fuel in 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 analysis result of the fluctuation size, the oscillation intensity of the first target signal can be determined. The oscillation intensity is an index to measure the instability and fluctuation degree of the signal. Larger oscillation intensity indicates that the signal fluctuates violently and the instability of the fuel combustion process is higher; while smaller oscillation intensity indicates that the signal fluctuates relatively smoothly and the fuel combustion process is relatively stable.

[0047] In the embodiments of the present application, according to the determination of 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. According to the adjustment of 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, so that the engine can run more stably and efficiently.

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

[0049] Optionally, the oscillation intensity of the signal can be calculated using different methods by monitoring the fluctuation size of the front oxygen sensor signal. For example, the oscillation intensity of the front oxygen sensor signal can be evaluated by calculating the integral area and amplitude size 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 limited in this regard. Any process and method that can reflect the fluctuation degree of the front oxygen sensor are within the scope of the embodiments of the present application.

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

[0052] In the technical solution provided in the above step S106 of the present application, the oil circuit system is used to deliver fuel from the fuel tank to the engine combustion chamber and inject the fuel through the fuel injector according to a certain time and amount to mix with air to form combustible gas, which can also be referred to as a fuel system. The corrected oil circuit system can be used to inject fuel with an oil amount corresponding to the oscillation 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 based at least on the oscillation intensity, so that the corrected oil circuit system can inject fuel with an oil amount 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 to be diagnosed and corrected, i.e., whether the oil circuit system needs to be diagnosed and corrected. If an abnormality or fluctuation is detected in the front oxygen sensor signal, a diagnosis program can be triggered to detect and diagnose the problem. If it is found after diagnosis that correction is needed, the calculation after diagnosis will be performed, i.e., the oil circuit system will be adjusted and corrected according to the diagnosis result.

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

[0056] In the embodiment of the present application, 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, and the stability and accuracy of the engine control system are ensured. The diagnostic correction can help the control system to discover and solve problems in time, and reduce the uncertainty caused by faults. And the correction model calculation for normal fluctuation can optimize the control strategy and improve the efficiency and performance of the control system. In summary, the above intelligent judgment and processing method helps to ensure the stable operation and accuracy of the front oxygen sensor control system.

[0057] Optionally, the injection quantity is corrected through the front oxygen sensor signal, so as to realize the optimal control of air-fuel ratio and improve the emission performance of the engine, so as to effectively deal with the air-fuel ratio fluctuation caused by the deviation or fault of the front oxygen sensor, and ensure the stability and excellent performance of the engine emission performance.

[0058] In step S108, the feedback signal of the corrected oil circuit system is output 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 by the above step S108 of the present application, the oscillation intensity of the updated first target signal is less than that of the first target signal before updating.

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

[0061] Optionally, the 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 correction of the injection, and the oil circuit system is corrected based on the oscillation intensity. The feedback signal is obtained after correction and output to the front oxygen sensor, which is used to update the first target signal collected by the front oxygen sensor.

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

[0063] In the embodiments of the present application, the fuel injection is corrected according to the oscillation level of the pre-oxygen sensor signal, and the fuel supply 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 to reduce the fluctuation of the fuel injection, optimize the combustion process, reduce the generation of emissions, and improve the performance and environmental performance of the engine. Through the update of the feedback signal, the correction of the pre-oxygen sensor signal can be realized to ensure the accuracy and stability of the system feedback and further improve the working efficiency and environmental performance of the engine.

[0064] In the steps S102-S108, in order to avoid the oscillation phenomenon caused by the front oxygen sensor, the first target signal collected by the front oxygen sensor is obtained, which is used to represent the combustion degree of the fuel in the engine. The signal of the front oxygen sensor reflects the change of the oxygen content in the exhaust gas, which can help the control system to adjust the mixing ratio of fuel and air. The oscillation intensity of the first target signal can be determined to represent the fluctuation degree of the signal. The determination of the oscillation intensity can help to evaluate the stability and accuracy of the first target signal. Based on the oscillation intensity, the oil system in the control system can be corrected to inject fuel corresponding to the oil amount of the oscillation intensity into the engine. According to the signal fluctuation degree, the fuel injection amount is adjusted, which can improve the combustion efficiency and reduce the generation of emissions. The feedback signal of the corrected oil system is output to the front oxygen sensor to update the first target signal by 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 system can be adjusted according to the real-time combustion condition to improve the combustion efficiency and the accuracy of emission control. Through the feedback control mechanism, the fuel supply can be continuously updated to maintain a stable combustion state of the engine 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, and 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 method for determining the oscillation intensity of the first target signal in this embodiment will be further described below.

[0066] As an optional embodiment, the oscillation intensity includes an oscillation intensity level, and the oscillation intensity level is positively correlated with the correction degree of the oil system. In step S104, the oscillation intensity of the first target signal is determined, including: in response to the first target signal being in an oscillation 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 oscillation state, the oscillation intensity level of the first target signal can be determined, wherein the oscillation intensity can include the oscillation intensity level. The oscillation intensity level is positively correlated with the correction degree of the oil system, that is, the greater the oscillation intensity, the greater the limitation correction of the oil system required, and the smaller the oscillation intensity, the smaller the limitation correction of the oil system required.

[0068] Optionally, in 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 oscillation state. If yes, it indicates that the oil circuit system needs to be corrected. Otherwise, it indicates that the oil circuit system does not need to be corrected. If it is in an oscillation state, the oscillation intensity level needs to be further determined to determine the correction degree 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 oscillation state. The oscillation state indicates that the signal has fluctuations and instability, and the oil circuit system may need to be corrected to improve stability and combustion efficiency. If the first target signal is in an oscillation state, the oscillation intensity level is further determined. The oscillation intensity level can be classified according to the degree and frequency of signal fluctuations, such as low, medium, and high levels. Different oscillation intensity levels represent the degree of signal fluctuation and the stability of the system, which are used to measure the instability and fluctuation degree of the signal.

[0070] It should be noted that the number and level of the above-mentioned oscillation intensity level are only for illustration and are not limited specifically herein.

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

[0072] In the embodiment of the present application, by the above method, the correction degree 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 to ensure the normal operation and performance optimization of the engine.

[0073] The method of how to determine whether the first target signal is in an oscillation state in this embodiment is further described below.

[0074] As an optional embodiment, the method comprises: determining the amplitude of the air-fuel ratio corresponding to the first target signal in the sampling period, wherein the air-fuel ratio is used to represent the weight ratio between air and 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 an oscillation state.

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

[0076] Optionally, the oscillation intensity of the signal is calculated according to the fluctuation size of the front oxygen sensor signal, and the one-way oscillation or two-way oscillation and the oscillation intensity are determined by the integral area and the amplitude size.

[0077] Optionally, the fluctuation size can be calculated by the integral area and the amplitude size of the signal. The integral area represents the total amount of fluctuation of the signal in a certain time, and the amplitude size represents the maximum amplitude of the fluctuation. Through analysis and processing of 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 one-way oscillation or two-way oscillation of the signal can be determined by the waveform characteristics of the signal. One-way oscillation refers to the fluctuation of the signal in one direction, while two-way oscillation refers to the fluctuation of the signal in both positive and negative directions. Determining the one-way or two-way oscillation of the signal helps to understand the fluctuation pattern of the signal and further analyze the periodicity and stability of the signal.

[0079] Optionally, the oscillation intensity of the signal can be determined by the results of the integral area and the amplitude size, combined with the fluctuation pattern of the signal (such as one-way or two-way oscillation). The oscillation intensity can be used to evaluate the instability and fluctuation degree of the signal. Through a model or algorithm, the oscillation intensity is converted into an oscillation intensity level, which can usually be divided into different levels such as low, medium and high, so as to further analyze and process.

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

[0081] In the embodiments of the present application, by the above method, the oscillation intensity of the signal can be calculated according to the fluctuation size of the front oxygen sensor signal, the one-way or two-way oscillation can be determined, and the oscillation intensity level can be determined. This process helps to accurately evaluate the stability and fluctuation degree of the signal, provides guidance for subsequent control and adjustment, further optimizes the combustion process, and improves the performance and environmental performance of the engine.

[0082] Optionally, the integral of the oxygen sensor signal over a calibration time can be calculated as one of the conditions for determining the oscillation intensity. The calibration time refers to the time range within which the integral of the oxygen sensor signal is calculated. The integral is the accumulation of the signal over time, which can reflect the overall change of the signal. By integrating the oxygen sensor signal over the calibration time, the total 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 integral can reflect the fluctuation degree of the signal, i.e. the total change of the signal within the calibration time. A larger integral value indicates that the signal fluctuates more in this time period, and the signal has higher instability. By analyzing the integral result, the oscillation intensity of the oxygen sensor signal can be determined. A larger integral value may represent a larger fluctuation and instability of the signal, which needs to be further adjusted and controlled.

[0083] Optionally, the integral result within the calibration time is one of the conditions for determining the oscillation intensity. Generally, a larger integral value may represent a larger fluctuation of the signal, and the combustion process has higher instability, which needs to be handled accordingly. In combination with other conditions, such as amplitude size, 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 correction degree of the fuel path system.

[0084] In the embodiment of the present application, by calculating the integral of the oxygen sensor signal within the calibration time, the total fluctuation of the signal can be obtained as one of the conditions for determining 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, so as to optimize the combustion process and improve the performance and environmental performance of the engine.

[0085] The method for determining whether the first target signal is in an oscillation state based on the amplitude in the above embodiment will be further described below.

[0086] As an optional embodiment, determining that the first target signal is in an oscillation state based on the amplitude includes: determining a first number of times that the amplitude exceeds a first amplitude threshold value within a sampling period, and a second number of times that the amplitude exceeds a second amplitude threshold value, wherein the first amplitude threshold value and the second amplitude threshold value are used to represent a predetermined lean and rich degree range of the fuel 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 of times being greater than a number threshold value and the second number of times being greater than the number threshold value, determining that the first target signal is in an oscillation state.

[0087] In this embodiment, in the process of determining that the first target signal is in the oscillation state based on the amplitude, the first number of times that the amplitude exceeds the first amplitude threshold in the sampling period and the second number of times that the amplitude exceeds the second amplitude threshold can be determined. If both the first number of times and the second number of times are greater than the number threshold, it can be indicated that the first target signal is in the oscillation state. The first amplitude threshold and the second amplitude threshold can be used to represent a predetermined lean-rich degree range of the fuel in the engine, that is, the valve values of the rich end and the lean end. The second amplitude threshold is greater than the first amplitude threshold, that is, the first amplitude threshold is the valve value of the lean end, and the second amplitude threshold is the valve value of the rich end. The first number of times can be the lean end crossing number, which can be represented by nl. The second number of times can be the rich end crossing number, which can be represented by nr. The mixture can be the mixed gas in the engine.

[0088] Optionally, in the calibration time, the alternating oscillation of the signal is judged by the valve values of the rich end and the lean end. By calculating the lean end crossing number nl and the rich end crossing number nr, the number of times of alternating oscillation of the signal can be evaluated. When the crossing numbers of the lean end and the rich end are both greater than a certain value, it can be judged that the system has oscillation. The above calculation method can help to further confirm the oscillation intensity of the signal and serve as an important basis for judging the oscillation of the system.

[0089] Optionally, by calculating the number of times of the amplitude, the oscillation intensity of the system can be judged. In the calibration time, by setting the threshold values (valve values) of the rich end and the lean end, that is, the first amplitude threshold and the second amplitude threshold, it can be judged whether the signal alternately oscillates between the two threshold values. The threshold values of the rich end and the lean end can be used to judge the fluctuation range of the signal. By calculating the crossing numbers of the rich end and the lean end in the calibration time, that is, the lean end crossing number nl and the rich end crossing number nr, the fluctuation of the signal can be evaluated.

[0090] The method for determining that the first target signal is in the oscillation state when both the first number of times and the second number of times are greater than the number threshold will be further described below.

[0091] As an optional embodiment, in response to the first number of times being greater than the number threshold and the second number of times being greater than the number threshold, determining that the first target signal is in the oscillation state comprises: in response to the amplitude alternately exceeding the first amplitude threshold and the second amplitude threshold in the sampling period, the first number of times being greater than the number threshold, and the second number of times being greater than the number threshold, determining that the first target signal is in the oscillation state.

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

[0093] Optionally, when the two crossing times nl and nr are alternately increasing and are greater than a certain value, it can be judged that the system is in a shock state. Alternately increasing indicates that the shock frequency 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 nl and nr are both greater than the threshold, it can be determined that the first target signal is in a shock state, and further adjustment and processing are needed.

[0094] Optionally, the crossing times of nl and nr are used as one of the conditions for judging the shock intensity. When the two crossing times are greater than a certain threshold, it can be judged that the system has strong shock. By comprehensively considering the results of amplitude size and frequency calculation and other conditions such as integral area and fluctuation frequency, the shock intensity of the system can be more comprehensively evaluated, and the basis for subsequent adjustment and optimization is provided.

[0095] In the embodiment of the application, the shock intensity of the system can be evaluated by calculating the amplitude size and the number of times of crossing the rich and lean ends alternately. The above method helps to understand the fluctuation frequency and amplitude range of the system, further quantifies the fluctuation degree of the system, and provides guidance for adjusting and controlling the system to improve the stability and performance of the system.

[0096] The method for determining the shock intensity level of the first target signal in this embodiment will be further described below.

[0097] As an optional embodiment, step S104 of determining the shock intensity level of the first target signal comprises: determining the integral result of the air-fuel ratio in the sampling period; determining the average amplitude of the first target signal in the sampling period based on the integral result; and determining the shock intensity level 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 and the second number of times are positively correlated with the shock intensity level.

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

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

[0100] (1)

[0101] wherein, It can be used to represent the result of integration, that is, the area of ​​integration; It can be used to represent the sampling period; It can be used to represent the air-fuel ratio.

[0102] Optionally, points This indicates that within the sampling period, The cumulative amount of the absolute difference between the expected value of 1 and the expected value of 1. This absolute difference can be used to evaluate... The degree of fluctuation and stability, that is, the deviation of the signal from the expected value. In other words, the integral... Indicates from 0 to Within the time frame, The cumulative amount of the absolute difference between the expected value and 1. That is, the sum of the values ​​between the expected value and the actual value. The absolute value of the difference from the expected value of 1 is processed 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 within the sampling period.

[0103] Optionally, when When the absolute difference between the value and the expected value of 1 is large, the cumulative amount This will increase. It indicates that the signal fluctuates more significantly within the sampling period, deviating further from the expected value. By analyzing the cumulative absolute difference, the amplitude and stability of the signal fluctuation can be assessed, thus understanding the signal's changes and degree of deviation. Integration results This can serve as an indicator of signal fluctuation. A larger integral value indicates greater signal fluctuation, potentially requiring further adjustment and control. By analyzing the integral results, the intensity of signal oscillations can be determined, providing a basis for subsequent control and optimization.

[0104] In this embodiment of the invention, by using the method described above to calculate the cumulative absolute difference between the signal λ and the expected value 1, the fluctuation and stability of the signal can be evaluated. This method helps to quantify the degree of signal fluctuation, providing guidance for subsequent adjustments and control to optimize the combustion process and improve engine performance and environmental performance.

[0105] Alternatively, the average amplitude can be determined using the following formula:

[0106] (2)

[0107] in, It can be used to represent the average amplitude, that is, the average vibration.

[0108] The process of determining the oscillation intensity level based on the average amplitude, the first input, and the second input in this embodiment will be further explained below.

[0109] As an optional embodiment, the determination of the oscillation intensity level based on the average amplitude, the first number and the second number comprises: in response to no correction instruction for the front oxygen sensor being received, determining the oscillation intensity level based on the average amplitude, the first number and the second number, wherein the correction instruction is used for correcting 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 no correction instruction for the front oxygen sensor is 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 referred to as the intensity level of the oscillation.

[0111] Optionally, when there is no diagnostic correction, the oscillation intensity level of the signal can be determined by the average amplitude and the oscillation number, so as to calculate the correction model.

[0112] Optionally, the oscillation intensity of the signal is evaluated by calculating the average amplitude and the oscillation number. The greater the amplitude and the more the oscillation number, the more obvious the fluctuation of the signal, and the greater the oscillation intensity. By comprehensively considering these two parameters, the system can determine the oscillation intensity level of the first target signal, and further process or adjust the first target signal. According to the determined oscillation intensity level, the system can calculate the correction model. According to the size of the oscillation intensity, the parameters or structure of the model can be adjusted accordingly to adapt to different working conditions and signal fluctuation conditions. In particular, the restriction correction of the oil circuit can be adjusted to different degrees according to the size of the oscillation intensity, so as to ensure the stability of the combustion efficiency and the emission performance.

[0113] In the existing closed-loop control system, if the current oxygen sensor deviates or fails, the front oxygen closed-loop control system will produce oscillation, which will affect the emission performance of the engine, including the deterioration of the original engine emission, the decrease of the catalytic converter conversion efficiency, and the serious over-standard problem of the emission.

[0114] In the embodiment of the present application, in order to solve the above problems, an engine front oxygen sensor closed-loop control method is provided, which aims to weaken or eliminate the fluctuation oscillation of the air-fuel ratio when the front oxygen sensor deviates or fails, so as to improve the stability of the front oxygen sensor closed-loop control, enhance the robustness of the engine emission, and improve the emission performance of the engine.

[0115] By the above control method, the fluctuation oscillation problem caused by abnormal front oxygen sensor signal can be effectively addressed, and the resulting emission performance degradation and excessive emission can be avoided. By weakening or eliminating the fluctuation oscillation, the air-fuel ratio control can be stabilized, the combustion efficiency can be improved, the harmful gas emission can be reduced, and the catalytic converter 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 protection regulations, and is of great significance for automobile and other engine applications.

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

[0117] As an optional embodiment, step S106 of modifying the oil circuit system based on at least the oscillation intensity includes: modifying the oil circuit system based on the oscillation intensity, and the intake air flow of the engine and / or the oxygen storage performance index of the catalytic converter, wherein the catalytic converter 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 degree of the oxygen storage performance of the catalytic converter.

[0118] In this embodiment, during the process of modifying the oil circuit system based on at least the oscillation intensity, the oil circuit system can be modified based on the oscillation intensity, and the intake air flow of the engine and / or the oxygen storage performance index of the catalytic converter. The catalytic converter 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 degree of the oxygen storage performance of the catalytic converter, which can be the maximum oxygen storage capacity of the catalytic converter.

[0119] Optionally, when modifying the model, factors such as engine intake air flow and catalytic converter maximum oxygen storage capacity are considered. These factors will affect the combustion process and the effect of emission control. Therefore, the model is modified according to these factors to improve the accuracy and performance of the system. The oscillation intensity level is determined according to the average amplitude and the number of oscillations, and the modified model is calculated according to 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 realize a more efficient and environmentally friendly engine working state.

[0120] Optionally, the entire control system is modified under the current front oxygen closed loop, and when the closed loop is exited, it will not be limited by the control system, and when it enters the closed loop again, it needs to be re-determined. When there is a diagnosis request, the control system will not be limited.

[0121] Optionally, in the current oxygen closed loop discrimination correction process, the control system performs discrimination correction under the current front oxygen sensor closed loop control, that is, according to the fluctuation level of the front oxygen sensor signal, the fuel injection is corrected 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 fuel injection amount. However, once the closed loop state is exited, the system will no longer be subject to such limitation, and the fuel injection amount may be affected by other factors. Therefore, when the closed loop state is entered again, the system needs to re-perform discrimination correction, re-evaluate the shock intensity level according to the current working state, and make corresponding adjustment to the fuel injection amount.

[0122] Optionally, when the system receives a diagnosis request, the control system does not perform the limitation. This means that when the system receives a diagnosis request, fault diagnosis and repair of the system may be required, and at this time, the fluctuation of the front oxygen sensor signal will not be limited and corrected. In this way, it can be ensured 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 application, the operation and control mode of the control system are clearly specified by the above two settings, ensuring that the control system can perform corresponding control and adjustment according to the actual situation in the closed loop and open loop states. These settings help the control system to maintain stable and efficient operation in different working states, while ensuring the smooth progress of diagnosis and maintenance work.

[0124] The process of how the oil system is corrected according to the correction instruction in this embodiment is further described below.

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

[0126] In this embodiment, when the correction instruction is received, the oil 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 diagnosed to be corrected for the oil system.

[0127] Optionally, when the correction instruction is received, the oil 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 working parameters of the oil system can be adjusted according to the correction data contained in the correction instruction. For example, the correction instruction can include parameters such as fuel injection amount, injection timing, injection duration, etc. that need to be adjusted, in order to optimize the adjustment of the engine combustion process, which is only used as an example and is not limited specifically.

[0128] Optionally, the engine control system adjusts the oil circuit system according to the correction data in the correction instruction. This may involve adjusting the working timing, injection amount, injection angle, and other parameters of the fuel injectors. Adjusting the oil circuit system according to the correction data can optimize the fuel injection process, improve combustion efficiency, and stabilize emission control. According to the correction data in the correction instruction, the adjustment parameters of the oil circuit system are applied to actual operation. This may involve adjusting the opening timing, closing timing, and injection amount of the fuel injectors. 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, the generation of emissions can be reduced, and the performance and environmental performance of the engine can be ensured. The accuracy and effectiveness of the correction data are crucial to ensuring 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 receiving the correction instruction, adjusting the oil circuit system according to the correction data in the correction instruction can optimize the combustion process of the engine, improve performance and environmental performance. The above method helps to ensure the normal operation and stability of the engine, and realizes precise control of the combustion process.

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

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

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

[0133] Optionally, in addition to correcting the fuel injection according to the oscillation level of the front oxygen sensor, the system can 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 and perform feedback adjustment according to the actual combustion conditions to further optimize the air-fuel ratio control. By correcting the fuel injection amount, the catalyst can be kept in the high-efficiency conversion range, improving the conversion efficiency of harmful gases and reducing emissions. This helps to protect the working state of the catalyst and prolong its service life, while reducing the impact on the environment. The feedback signal after the correction of the fuel injection is fed back to the front oxygen sensor, forming a closed-loop control system. The front oxygen sensor monitors the change in air-fuel ratio, and the system adjusts the fuel injection amount based on the feedback signal to achieve stable control of the air-fuel ratio. This closed-loop control system can ensure that the engine combustion efficiency and emission performance operate in good condition.

[0134] In summary, according to the oscillation level of the front oxygen sensor, the fuel injection can be corrected, 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 emissions, and improve the conversion efficiency of the catalyst, thereby achieving environmentally friendly and efficient engine operating conditions.

[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 correction of the fuel injection can also be assisted to ensure the high-efficiency conversion range of the catalyst. This adjustment and correction process forms a closed-loop control system, which realizes the stability and performance optimization of the system through continuous feedback signals and adjustments.

[0136] Optionally, the PID adjustment of the rear oxygen sensor mainly adjusts 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 to make the measured value of the sensor as close as possible to the expected value, so as to maintain the accuracy and stability of the sensor. During the PID adjustment 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 in the engine combustion process is within the high conversion interval of the catalyst. Through the correction of injection, the combustion efficiency can be optimized, the stability of emission control can be improved, and the efficient work of the catalyst can be ensured. Through the PID adjustment of the rear oxygen sensor and the correction of injection, a closed-loop control system is formed. This system realizes the coordinated work between the sensor, the injection system and the catalyst through continuous feedback signal and adjustment, to ensure the stability and high efficiency of the whole system. The feedback signal after the injection correction returns to the front oxygen sensor, forming a closed-loop control cycle, ensuring that the control system can maintain stable combustion state and emission control under different working conditions.

[0137] Optionally, the oil circuit is fine-tuned through the rear oxygen PI control, making the combustion more stable and reducing the emission of harmful gases. At the same time, through the rear oxygen self-learning function, the control system can be adaptively adjusted according to the actual running situation, improving the conversion efficiency of the three-way catalyst and further reducing the emission of pollutants.

[0138] In the embodiment of the present application, in order to avoid the oscillation phenomenon of the engine caused by the front oxygen sensor, a first target signal collected by the front oxygen sensor can be obtained, which is used to represent 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 to adjust the mixing ratio of the fuel and air. The oscillation intensity of the first target signal can be determined, which is used to represent the fluctuation degree of the signal. The determination of the oscillation intensity can help to 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 oil amount of the oscillation intensity into the engine. According to the signal fluctuation degree, the fuel injection amount is adjusted, which 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 by using the feedback signal. Through feedback control, the fuel supply can be continuously optimized, and the combustion efficiency and emission control performance of the engine can be improved. 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 condition, and the combustion efficiency and the accuracy of emission control can be improved. Through the feedback control mechanism, the fuel supply can be continuously updated, so that the engine can maintain a stable combustion state under different working conditions, and the generation of emissions can be reduced. 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, and achieving the technical effect of improving the signal processing effect of the engine, solving the technical problem of poor signal processing effect of the engine.

[0139] The technical solutions of the embodiments of the present application will be described below in conjunction with preferred embodiments.

[0140] At present, with the upgrading of emission regulations, the emission limit of the engine under different working conditions is becoming more and more 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 have an uncertain negative impact on the control of the entire closed-loop system, resulting in poor air-fuel ratio stability and 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, the embodiment of the present application proposes a control method for engine wide-range oxygen sensor signals when oscillation occurs, to weaken or eliminate the fluctuation oscillation of air-fuel ratio when the front oxygen sensor generates deviation or failure, thereby improving the stability of the front oxygen sensor closed-loop control, and further improving the engine emission performance. The key of the method is to design an intelligent closed-loop control system, which can timely detect the deviation or failure of the front oxygen sensor signal, and take corresponding control strategy to adjust the fuel injection amount to maintain the appropriate air-fuel ratio. Specifically, when the system detects abnormality of the front oxygen sensor signal, compensation can be performed by introducing a backup sensor or using 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 be used 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 application, the fluctuation oscillation of air-fuel ratio when the front oxygen sensor deviates or fails can be effectively weakened or eliminated, and the stability of the front oxygen sensor closed-loop control is improved. This will be conducive to reducing the emission amount of engine emissions, improving the emission performance, and also improving the robustness and reliability of the engine. Further, 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 application is further illustrated below.

[0145] In this embodiment, Figure 2 is a flow chart of a control method for engine wide-range oxygen sensor signals when oscillation occurs, as shown in Figure 2 The method can include the following steps:

[0146] Step S202, constructing a front oxygen sensor oscillation intensity model, collecting oxygen sensor signals, and calculating the signal oscillation intensity.

[0147] In this embodiment, the front oxygen sensor oscillation intensity model is constructed by collecting oxygen sensor signals and performing signal processing. By calculating the oscillation intensity of the signal, it can be evaluated whether the working state of the front oxygen sensor is normal or not, so as to adjust the subsequent control strategy.

[0148] Step S204, limiting the oil circuit system to different degrees according to the oscillation intensity.

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

[0150] Step S206, further limit the control system according to the load of engine operation and the aging degree of catalyst.

[0151] In this embodiment, in addition to considering the oscillation intensity of the front oxygen sensor, the control system can be further limited according to factors such as the load of engine operation and the aging degree of catalyst. In this way, the fuel injection amount can be adjusted more accurately, the air-fuel ratio control can be optimized, and the emission performance of the engine can be improved.

[0152] Step S208, the rear oxygen PI control fine-tunes the oil circuit, the rear oxygen self-learning, improves the conversion efficiency of the three-way catalyst.

[0153] In this embodiment, the oil circuit is fine-tuned by the rear oxygen PI control, so that the combustion is more stable and the emission of harmful gases is reduced. At the same time, through the rear oxygen self-learning function, the control system can be adaptively adjusted according to the actual operation, the conversion efficiency of the three-way catalyst is improved, and the emission of the emission is further reduced.

[0154] Step S210, the injection correction is passed through the front oxygen sensor signal to obtain the optimized air-fuel ratio and emission performance.

[0155] In this embodiment, the injection amount is corrected through the front oxygen sensor signal, so as to realize the optimized control of the air-fuel ratio and improve the emission performance of the engine. In this way, the air-fuel ratio fluctuation caused by the deviation or failure of the front oxygen sensor can be effectively dealt with, and the stability and excellent of the engine emission performance can be ensured.

[0156] In the embodiment of the present application, in the above method, by comprehensively considering the working state of the front oxygen sensor, the limitation of the oil circuit system, the engine load and the aging degree of the catalyst and other factors, the overall optimization and improvement of the engine emission performance are realized.

[0157] Figure 3 is a schematic diagram of a closed loop circuit of an engine wide-range oxygen sensor signal when oscillation occurs, according to an embodiment of the present application, as shown in Figure 3 may include the following steps:

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

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

[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 to monitor the status of the engine combustion process in real time. If the air-fuel ratio deviates from the ideal value, it may cause the combustion efficiency to decrease and produce more harmful emissions. Therefore, accurately collecting information about the air-fuel ratio of the exhaust is crucial for the performance and emission control of the engine.

[0161] Step S302, determination of oscillation of the front oxygen sensor signal and determination of oscillation intensity.

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

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

[0164] In the embodiments of the present application, by calculating and analyzing the oscillation intensity of the front oxygen sensor signal, the engine control system can timely find the abnormal fluctuation of 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 according to 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 in the calibration time calculated according to the oxygen sensor signal can be used as one of the conditions for judging the oscillation intensity.

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

[0167]

[0168] Wherein, can be used to represent the integral result, that is, the integral area; can be used to represent the sampling period; can be used to represent the air-fuel ratio.

[0169] Optionally, the average amplitude can be determined by the following formula:

[0170]

[0171] wherein, may be used to represent the average amplitude, i.e., the average amplitude.

[0172] Optionally, within the calibration time, the signal oscillation situation is judged by the threshold values 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 signal oscillations 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 judged that the system has oscillations. The above calculation method can help further confirm the oscillation strength of the signal and serve as an important basis for judging system oscillations.

[0173] In summary, the above calculation method combines the calculation of integral, average amplitude and oscillation number, and provides an effective means to judge the stability and accuracy of the signal by comprehensively evaluating the fluctuation of the pre-oxygen sensor signal. This helps to timely discover abnormal fluctuations of the signal and take corresponding control measures to ensure the normal operation and emission performance of the engine.

[0174] Step S303, whether the sensor diagnosis is to correct the signal.

[0175] In this embodiment, it is judged whether diagnosis correction is needed. If the system detects that the pre-oxygen sensor signal has abnormalities or fluctuations, the diagnosis program may be triggered to detect and diagnose the problem. If the system finds that correction is needed after diagnosis, the calculation after diagnosis will be performed, i.e., the system is adjusted and corrected according to the diagnosis result. If it is judged that correction is needed, step S306 can be performed, otherwise, step S305 can be performed.

[0176] Optionally, if the system judges that no diagnosis correction is needed, i.e., the pre-oxygen sensor signal fluctuation is not caused by system failure, but is caused by normal fluctuation or other reasons, the system will perform the correction model calculation. In this case, the system will correct and adjust the model according to the oscillation strength level and other parameters calculated before, to better adapt to the current working conditions and signal fluctuation situation.

[0177] Optionally, by judging whether there is diagnosis correction and handling accordingly, the abnormal fluctuations of the pre-oxygen sensor signal can be dealt with more intelligently, ensuring the stability and accuracy of the system. Diagnosis correction can help the system to discover and solve problems in time, reducing the uncertainty caused by failure; 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 handling method helps to ensure the stable operation and accuracy of the pre-oxygen sensor control system.

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

[0179] In this embodiment, when the system is diagnosed and corrected, 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 value obtained by diagnosis, so as to more accurately reflect the actual situation of the front oxygen sensor signal. The size of the diagnostic calculation value may reflect the degree of abnormality of the signal or the severity of the system failure, and the system can make corresponding adjustments according to these information.

[0180] According to the size of the diagnostic calculation value, the model can be corrected to more accurately adapt to the current working state and environmental conditions, thereby improving the stability and accuracy of the system. By adjusting the model in a timely manner according to the diagnosis result, the system can more effectively cope with the abnormal fluctuations or failures of the front oxygen sensor signal, ensure the normal operation of the system and improve the performance of the control system.

[0181] Step S305, the correction model is calculated according to the oscillation 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 calculating the average amplitude and the number of oscillations, so as 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 greater the amplitude and the more the number of oscillations, the more obvious the fluctuations of the signal, and the greater the oscillation intensity. By comprehensively considering 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 size 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 different degrees according to the size of the oscillation intensity, so as to ensure the stability of the combustion efficiency and emission performance.

[0184] Optionally, when the model is corrected, the engine intake flow and the maximum oxygen storage capacity of the catalyst and other factors are considered. These factors will affect the combustion process and the effect of emission control. The model can be corrected according to these factors to improve the accuracy and performance of the system. According to the average amplitude and the number of oscillations to determine the oscillation intensity level, and according to this level to calculate the correction model, the fluctuations of the signal can be better evaluated and adjusted accordingly.

[0185] Step S306, the oil injection of the oil circuit system is corrected.

[0186] In this embodiment, according to the evaluation result of the oscillation level of the front oxygen sensor, the fuel injection amount can be adjusted and corrected accordingly. 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, improving combustion efficiency and emission performance.

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

[0188] In this embodiment, in addition to correcting the fuel injection according to the oscillation level of the front oxygen sensor, the rear oxygen sensor can be used for correction. The oxygen content in the exhaust gas can be monitored, and feedback adjustment can be made according to the actual combustion condition, further optimizing 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, use the calculated value obtained after diagnosis to correct the model.

[0192] In this embodiment, through the correction of the fuel injection amount, it can be ensured that the catalyst is in the high-efficiency conversion interval, improving the conversion efficiency of harmful gases and reducing the generation of emissions. This helps to protect the working state of the catalyst and prolong its service life, while reducing the impact on the environment.

[0193] In the embodiment of the present application, the feedback signal after the correction of the fuel injection is fed back to the front oxygen sensor, forming a closed-loop control system. 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 realize stable control of the air-fuel ratio. This closed-loop control system can ensure that the engine combustion efficiency and emission performance are in good condition. According to the oscillation level of the front oxygen sensor, the fuel injection is corrected, and combined with the PID adjustment function of the rear oxygen sensor, the combustion control can be effectively optimized, and the efficiency and emission performance of the engine can be improved. 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, so as to realize the environmentally friendly and efficient engine operating state.

[0194] Optionally, under the closed-loop control system, the correction is determined, when the closed loop is exited, the control system is not limited, and when the closed loop is re-entered, it needs to be re-determined. When there is a diagnosis request, the control system is not limited.

[0195] In the existing closed-loop control system, when the current oxygen sensor has deviation or failure, the front oxygen closed-loop control will produce oscillation without diagnosis processing, which will worsen the original engine emission and reduce the conversion efficiency of the catalyst, resulting in serious emission exceeding the standard. However, in the embodiment of the present application, a closed-loop control method for the engine front oxygen sensor is provided, which can weaken or eliminate the oscillation of air-fuel ratio when the front oxygen sensor has deviation or failure, improve the stability of the front oxygen sensor closed-loop control, and improve the robustness of the engine emission and the engine emission performance.

[0196] In the embodiment of the present application, a control system for the front oxygen closed-loop control oscillation caused by the deviation, failure or other conditions of the front oxygen sensor is established. The system calculates the oscillation intensity of the system by using the model, and corrects and limits the fuel system according to the oscillation intensity, so as to reduce the compensation of the oil circuit. The above control strategy can significantly reduce the tail gas emission, especially in the whole vehicle range increasing system, and the improvement effect on the emission performance is obvious. By establishing the 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 in time. 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 the combustion efficiency, and reduce the emission of harmful gases. Especially in the whole vehicle range increasing system, the application of this control strategy has more obvious improvement effect on the emission performance, which is helpful to reduce the emission level of the vehicle and improve the environmental protection performance.

[0197] In summary, the embodiment provides an effective method and control system, which can process the front oxygen sensor closed-loop control oscillation problem, reduce the emission amount of tail gas emission, and especially has obvious emission performance improvement effect in the whole vehicle range increasing system. This has important significance for improving the environmental protection performance of the engine and meeting the emission regulation requirements. Thus, the technical effect of improving the signal processing effect of the engine is realized, and the technical problem of poor signal processing effect of the engine is solved.

[0198] According to another aspect of the embodiment of the present application, corresponding to the above-mentioned embodiment of the engine signal processing method, the present specification also provides an engine control system, Figure 4 is a system block diagram of an engine control system according to an embodiment of the present application, as Figure 4 shown, the engine control system 400 can 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 represent the combustion degree of the fuel in the combustion process of the engine.

[0200] The oil path system 404 is used to correct 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 represent the fluctuation degree of the first target signal, the corrected oil path system is used to inject the fuel 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 that of the first target signal before the update.

[0201] In the control system of the engine in 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, which is used to represent the combustion degree of the fuel in the combustion process in the engine. The signal of the front oxygen sensor reflects the change of the oxygen content in the exhaust gas, which can help the control system to adjust the mixing ratio of the fuel and the air. The oscillation intensity of the first target signal can be determined, which is used to represent the fluctuation degree of the signal. The determination of the oscillation intensity can help to evaluate the stability and accuracy of the first target signal. Based on the oscillation intensity, the oil path system in the control system can be corrected to inject the fuel corresponding to the oscillation intensity into the engine. According to the adjustment of the fuel injection amount according to the fluctuation degree of the signal, the combustion efficiency can be improved, and the generation of the exhaust gas can be reduced. The feedback signal of the corrected oil path system is output to the front oxygen sensor to update the first target signal by using the feedback signal. Through the feedback control, the fuel supply can be continuously optimized, and the combustion efficiency and the emission control performance of the engine can be improved. In this embodiment, by processing and correcting the first target signal of the front oxygen sensor, the oil path system can be adjusted according to the real-time combustion condition, the combustion efficiency and the accuracy of the emission control are improved. Through the feedback control mechanism, the fuel supply can be continuously updated, so that the engine can maintain a stable combustion state under different working conditions, and the generation of the exhaust gas is reduced. By reducing the oscillation intensity of the first target signal, the stability of the control system can be improved, and the uncertainty caused by the system oscillation is reduced, so that the performance and the reliability of the control system are improved, and the technical effect of improving the signal processing effect of the engine is realized, and the technical problem of poor signal processing effect of the engine is solved.

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

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

[0204] The determination unit 504 is configured to determine an oscillation intensity of the first target signal, wherein the oscillation intensity is used to represent a fluctuation degree of the first target signal.

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

[0206] The output unit 508 is configured to output a feedback signal of the corrected fuel supply 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, 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, in the signal processing device 500 of the engine, the following units are provided: the acquisition unit 502 is configured to acquire a first target signal collected by the front oxygen sensor, wherein the first target signal is used to represent a combustion degree of the fuel in the combustion process in the engine; the determination unit 504 is configured to determine an oscillation intensity of the first target signal, wherein the oscillation intensity is used to represent a fluctuation degree of the first target signal; the correction unit 506 is configured to correct the fuel supply system based on at least the oscillation intensity, wherein the corrected fuel supply system is used to inject the fuel with an amount corresponding to the oscillation intensity into the engine; and the output unit 508 is configured to output a feedback signal of the corrected fuel supply 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, 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 the embodiments of the present application, a vehicle, which can be an autonomous vehicle, is provided, and the vehicle comprises a memory storing an executable program and a processor configured to execute the program, wherein the program performs any of the above methods when executed.

[0209] Figure 6 is a structural block diagram of an autonomous vehicle according to an embodiment of the present application, as shown in Figure 6 The components of the autonomous vehicle 600 include but are not limited to a memory 610 and a processor 620. The processor 620 is connected to the memory 610 through a bus 630, and a database 650 is used to save data.

[0210] The autonomous vehicle 600 can 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 the Public Switched Telephone Network (PSTN), a Local Area Network (LAN), a Wide Area Network (WAN), a Personal Area Network (PAN), or a combination of networks such as the Internet. The access device 640 can include one or more of any type of network interface (e.g., network interface card (NIC)) 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, either wired or wireless.

[0211] In one embodiment of the present disclosure, the above-mentioned components of the autonomous vehicle 600 and other components not shown in the above-mentioned components can be connected to each other, for example, through a bus. It should be understood that the above-mentioned components of the autonomous vehicle 600 and other components not shown in the above-mentioned components can be connected to each other through other means. Figure 6 In one embodiment of the present disclosure, the above-mentioned components of the autonomous vehicle 600 and other components not shown in the above-mentioned components can be connected to each other, for example, through a bus. It should be understood that the above-mentioned components of the autonomous vehicle 600 and other components not shown in the above-mentioned components can be connected to each other through other means. Figure 6 The autonomous vehicle structure diagram shown is only for the purpose of example, and is not a limitation on the scope of the present disclosure. Those skilled in the art can add or replace other components as needed.

[0212] According to another aspect of the embodiment of the present application, a computer readable storage medium is also provided, which includes a stored executable program, wherein the executable program controls the device where the storage medium is located to perform the method of any one of the above when the executable program is executed.

[0213] According to another aspect of the embodiment of the present application, a computer program product is also provided, which includes a computer program, wherein the computer program is executed by a processor to implement the method of any one of the above.

[0214] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0215] In several embodiments provided by the present application, it should be understood that the disclosed technology can be implemented in other ways. Among them, the above-mentioned device embodiments are only illustrative, for example, the division of units can be a logical function division, and actual implementation can have another division mode, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection between the units or modules through some interfaces, and can be electrical or other forms.

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

[0217] In addition, the functional units in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0218] If the integrated unit is realized 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 solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0219] The above is only the preferred embodiment of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A signal processing method of an engine, characterized by, A control system applied to an engine, the control system comprising at least: a front oxygen sensor and an oil circuit system, the method comprising: obtaining a first target signal collected by the front oxygen sensor, wherein the first target signal is used to represent a combustion degree of fuel combustion in the engine; determining a fluctuation intensity of the first target signal, wherein the fluctuation intensity is used to represent a fluctuation degree of the first target signal; correcting the oil circuit system based on at least the fluctuation intensity, wherein the corrected oil circuit system is used to inject fuel with an oil amount corresponding to the fluctuation intensity into the engine; 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 by using the feedback signal, wherein a fluctuation intensity of the updated first target signal is less than a fluctuation intensity of the first target signal before being updated; wherein the method further comprises: determining an amplitude of an air-fuel ratio corresponding to the first target signal within a sampling period; determining a first number of times that the amplitude exceeds a first amplitude threshold within the sampling period, and a second number of times that the amplitude exceeds a second amplitude threshold within the sampling period, wherein the first amplitude threshold and the second amplitude threshold are used to represent a predetermined lean-rich degree range of fuel in a mixture in the engine, and the second amplitude threshold is greater than the first amplitude threshold; and determining that the first target signal is in a fluctuation state 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.

2. The method of claim 1, wherein, The fluctuation intensity comprises a fluctuation intensity level, the fluctuation intensity level is positively correlated with a correction degree of the oil circuit system, and determining the fluctuation intensity of the first target signal comprises: determining the fluctuation intensity level of the first target signal in response to the first target signal being in the fluctuation state.

3. The method of claim 2, wherein, The air-fuel ratio is used to represent a weight ratio between air and fuel in the engine during fuel combustion in the engine, and the weight ratio is associated with the combustion degree.

4. The method of claim 1, wherein, Determining that the first target signal is in the fluctuation state 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 comprises: determining that the first target signal is in the fluctuation state in response to the amplitude alternatingly exceeding the first amplitude threshold and the second amplitude threshold within the sampling period, the first number of times being greater than the number threshold, and the second number of times being greater than the number threshold.

5. The method of claim 2, wherein, Determining the fluctuation intensity level of the first target signal comprises: determining an integral result of the air-fuel ratio within the sampling period; determining an average amplitude of the first target signal within the sampling period based on the integral result; determining the fluctuation intensity level 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, and the second number of times are positively correlated with the fluctuation intensity level.

6. The method of claim 5, wherein, Determining the fluctuation intensity level based on the average amplitude, the first number of times, and the second number of times comprises: In response to not receiving the correction instruction for the front oxygen sensor, determine the intensity level of the oscillation 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.

7. The method of claim 6, wherein, Correct the oil line system based on at least the intensity of the oscillation, including: Correct the oil line system based on the intensity of the oscillation, and the intake flow of the engine and / or the oxygen storage performance index of the catalyst, wherein the catalyst is used to convert the gas generated in the combustion process of the fuel in the engine, and the oxygen storage performance index is used to indicate the degree of the oxygen storage performance of the catalyst.

8. The method of claim 6, wherein, The method further includes: In response to receiving the correction instruction, correct the oil line system according to the correction data corresponding to the correction instruction.

9. The method according to any one of claims 1 to 8, characterized in that, The control system further includes a rear oxygen sensor, and the method further includes: Obtain a second target signal collected by the rear oxygen sensor, wherein the second target signal is used to represent the oxygen content of the converted gas generated in the combustion process of the fuel in the engine; Use the second target signal to perform feedback control on the rear oxygen sensor according to a feedback control strategy, wherein the feedback control strategy is used to represent the rules of the feedback control on the rear oxygen sensor; Use the controlled rear oxygen sensor to correct the oil line system.

10. A control system of an engine characterized by comprising: The control system at least includes a front oxygen sensor and an oil line system, wherein, The front oxygen sensor is used to collect a first target signal, wherein the first target signal is used to represent the combustion degree of the fuel in the engine in the combustion process; The oil line system is corrected by the intensity of the oscillation of the first target signal, and outputs a feedback signal to the front oxygen sensor, wherein the intensity of the oscillation is used to represent the fluctuation degree of the first target signal, the corrected oil line system is used to inject the fuel corresponding to the intensity of the oscillation into the engine, and the feedback signal is used to update the first target signal collected by the front oxygen sensor, and the intensity of the oscillation of the updated first target signal is less than that of the first target signal before updating; wherein the control system is used to execute the method of any one of claims 1 to 9.

11. A vehicle characterized by comprising: Including: A memory storing an executable program; A processor for running the program, wherein the program executes the method of any one of claims 1 to 9 when running.

12. A computer-readable storage medium, characterized in that, The computer readable storage medium includes a stored executable program, wherein the device where the storage medium is located executes the method of any one of claims 1 to 9 when the executable program runs.

13. A computer program product, characterised in that, The computer program is executed by the processor to implement the method of any one of claims 1 to 9. The computer program is executed by the processor to implement the method of any one of claims 1 to 9.

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