A method and device for monitoring the rotational speed of a supercharger, an electronic device, and a storage medium

Abstract

The present application discloses a method and device for monitoring the rotational speed of a supercharger, an electronic device, and a storage medium. The method includes: obtaining the actual parameters of the current supercharger and the current operating parameters of the engine; determining the theoretical parameters of the supercharger according to the current operating parameters of the engine; comparing the actual parameters with the theoretical parameters to determine whether there is air leakage after the supercharger; if there is no air leakage, the current intake air volume of the engine can be directly determined as the current intake air volume of the supercharger, and the current pressure ratio of the supercharger is calculated; if there is air leakage, the current intake air volume of the engine is corrected using a first correction amount to obtain the current intake air volume of the supercharger. If the current operating condition of the combined operation of the engine and the supercharger is a transient operating condition, a second correction amount is further used to correct the current intake air volume of the supercharger; using the finally obtained current intake air volume and pressure ratio of the supercharger, the current rotational speed of the supercharger is found from the rotational speed pulse diagram.

Description

Technical Field

[0001] The present application relates to a method for detecting the rotational speed of a supercharger, and particularly to a method and device for monitoring the rotational speed of a supercharger, an electronic device, and a storage medium. Background Art

[0002] In order to ensure the safety of vehicle driving, during the vehicle driving process, it is necessary to monitor the rotational speed of the supercharger in real time, so that when the rotational speed of the supercharger exceeds the limit value, torque limitation and alarm can be carried out in a timely manner. Therefore, accurate monitoring of the rotational speed of the supercharger is crucial.

[0003] Currently, mainly by obtaining the measured value of the intake pressure after the supercharger and taking the ratio of it to the ambient pressure as the pressure ratio before and after the supercharger. Then, based on the ideal gas state variance, the measured values of the pressure and gas temperature after the supercharger are used to calculate the engine intake air volume. Taking the engine intake air volume as the intake air volume of the supercharger, and then finding the rotational speed corresponding to the intake air volume and pressure ratio of the supercharger from the rotational speed map, thereby measuring the rotational speed of the supercharger.

[0004] However, there are several problems in the existing technology. First, there is a certain difference between the atmospheric pressure and the pressure before supercharging. Second, the data in the existing rotational speed map are only measured by a supercharger test bench, and there are differences between the operation of the supercharger on the test bench and the combined operation conditions of the supercharger and the engine. For example, the pulse pressure during the intake and exhaust cycles affects the rotational speed map of the supercharger compressor. Third, the existing method does not consider the influence of transient operating conditions. The engine intake air flow under transient operating conditions is also calculated by a model, which has a certain lag, and the existing method does not consider the situation of air leakage after supercharging. Due to these problems, the accuracy of the rotational speed of the supercharger monitored by the existing method is relatively low. Summary of the Invention

[0005] Based on the above deficiencies of the existing technology, the present application provides a method and device for monitoring the rotational speed of a supercharger, an electronic device, and a storage medium to solve the problem that the accuracy of the rotational speed of the supercharger monitored by the existing method is relatively low.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] The first aspect of the present application provides a method for monitoring the rotational speed of a supercharger, including:

[0008] Obtaining various actual parameters of the current supercharger and the current rotational speed, current torque, and current intake air volume of the engine; wherein, the actual parameters at least include the current actual gas pressure before supercharging, the current actual gas pressure after supercharging, the current actual gas temperature after the supercharger turbine, and the current actual opening of the supercharger;

[0009] Determine the cyclic fuel supply of the engine according to the current rotational speed and current torque of the engine;

[0010] Determine each theoretical parameter of the current supercharger according to the cyclic fuel supply of the engine and the current rotational speed; wherein, the theoretical parameters include the maximum theoretical opening of the current supercharger, the theoretical gas pressure before supercharging currently, the theoretical gas temperature after the turbine of the current supercharger, and the theoretical opening of the current supercharger;

[0011] Determine whether there is air leakage after the supercharger by comparing the actual parameters with the theoretical parameters;

[0012] If it is determined that there is no air leakage after the supercharger, determine the current intake air volume of the engine as the current intake air volume of the supercharger, and calculate the current pressure ratio of the supercharger; wherein, the current pressure ratio of the supercharger is calculated based on the actual gas pressure after supercharging currently and the actual gas pressure before supercharging currently;

[0013] If it is determined that there is air leakage after the supercharger, determine the sum of the current intake air volume of the engine and the first correction amount as the current intake air volume of the supercharger, and calculate the current pressure ratio of the supercharger; wherein, the first correction amount is the result of multiplying the difference between the actual gas pressure before supercharging currently and the theoretical gas pressure before supercharging currently by the calibrated proportionality coefficient; the calibrated proportionality coefficient is the proportionality coefficient between the gas pressure before supercharging of the supercharger and the intake air volume of the engine;

[0014] Judge whether the current working condition of the combined operation of the engine and the supercharger is a transient working condition;

[0015] If the current working condition of the combined operation of the engine and the supercharger is a transient working condition, correct the current intake air volume of the supercharger by using the current throttle change rate and the second correction amount corresponding to the current rotational speed of the engine; wherein, the second correction amount is calculated in advance based on the difference between the theoretical flow rate and the measured actual flow rate of the supercharger under transient working conditions;

[0016] Search for the rotational speed that matches the current intake air volume and current pressure ratio of the supercharger from the rotational speed pulse diagram corresponding to the supercharger to obtain the current rotational speed of the supercharger; wherein, the rotational speed pulse diagram is obtained through experiments under the combined operation of the engine and the supercharger.

[0017] Optionally, in the above-provided method for monitoring the rotational speed of the supercharger, the determining whether there is air leakage after the supercharger by comparing the actual parameters with the theoretical parameters includes:

[0018] By comparing the actual parameters with the theoretical parameters, it is determined whether the actual parameters meet each preset condition; wherein, the preset conditions include that the actual opening degree of the current supercharger is greater than the product of the theoretical opening degree of the current supercharger and the opening degree abnormal coefficient, and not greater than the maximum theoretical opening degree of the current supercharger, the actual gas pressure before the current supercharging is less than the product of the theoretical gas pressure before the current supercharging and the pressure abnormal coefficient, and the actual gas temperature after the turbine of the current supercharger is greater than the theoretical gas temperature after the turbine of the current supercharger;

[0019] If it is determined that the actual parameters meet each preset condition, it is determined that there is air leakage after the supercharger pressure;

[0020] If it is determined that the actual parameters do not meet any one of the preset conditions, it is determined that there is no air leakage after the supercharger pressure.

[0021] Optionally, in the above-provided method for monitoring the supercharger speed, the calculation of the current pressure ratio of the supercharger includes:

[0022] Dividing the sum of the actual gas pressure after the current supercharging and the current atmospheric pressure by the sum of the actual gas pressure before the current supercharging and the current atmospheric pressure to obtain the current pressure ratio of the supercharger.

[0023] Optionally, in the above-provided method for monitoring the supercharger speed, the determination of whether the current operating condition of the combined operation of the engine and the supercharger is a transient operating condition includes:

[0024] Determining whether the current throttle change rate is less than a preset change rate and whether the current throttle opening change amount is less than a preset change amount; wherein, if it is determined that the current throttle change rate is not less than the preset change rate and the current throttle opening change amount is not less than the preset change amount, it is determined that the current operating condition of the combined operation of the engine and the supercharger is a transient operating condition.

[0025] Optionally, in the above-provided method for monitoring the supercharger speed, the correction of the current intake air volume of the supercharger by using the current throttle change rate and the second correction amount corresponding to the current engine speed includes:

[0026] Finding out the second correction amount map corresponding to the temperature range in which the current actual gas temperature after the supercharger pressure is located;

[0027] Based on the current throttle change rate and the current engine speed, finding out the corresponding second correction amount from the correction amount map;

[0028] Adding the product of the current intake air volume of the supercharger and the found second correction amount to the current intake air volume of the supercharger to obtain the corrected current intake air volume of the supercharger.

[0029] Optionally, in the supercharger speed monitoring method provided above, after finding the speed that matches the current intake air volume and current pressure ratio of the supercharger from the corresponding speed spectrum diagram of the supercharger to obtain the current speed of the supercharger, the method further includes:

[0030] Determine whether the current speed of the supercharger is greater than a preset speed;

[0031] If it is determined that the supercharger is greater than the preset speed, send a first signal to the vehicle electronic control unit to trigger the vehicle electronic control unit to display an alarm through the instrument; wherein, the first signal indicates the current speed of the supercharger;

[0032] If the current speed of the supercharger is not greater than the preset speed, send a second signal to the vehicle electronic control unit to trigger the vehicle electronic control unit to determine whether to display the current speed of the supercharger in the second signal on the instrument based on a preset rule.

[0033] A second aspect of the present application provides a supercharger speed monitoring device, including:

[0034] An actual parameter acquisition unit for acquiring various actual parameters of the current supercharger and the current speed, current torque, and current intake air volume of the engine; wherein, the actual parameters at least include the current actual gas pressure before supercharging, the current actual gas pressure after supercharging, the current actual gas temperature after the supercharger turbine, and the current actual opening of the supercharger;

[0035] A fuel supply amount determination unit for determining the cyclic fuel supply amount of the engine according to the current speed and current torque of the engine;

[0036] A theoretical parameter determination unit for determining various theoretical parameters of the current supercharger according to the cyclic fuel supply amount and current speed of the engine; wherein, the theoretical parameters include the current maximum theoretical opening of the supercharger, the current theoretical gas pressure before supercharging, the current theoretical gas temperature after the supercharger turbine, and the current theoretical opening of the supercharger;

[0037] A leakage detection unit for determining whether there is a leak after the supercharger pressure by comparing the actual parameters with the theoretical parameters;

[0038] A first determination unit for, when it is determined that there is no leak after the supercharger pressure, determining the current intake air volume of the engine as the current intake air volume of the supercharger;

[0039] A pressure ratio calculation unit for calculating the current pressure ratio of the supercharger; wherein, the current pressure ratio of the supercharger is calculated based on the current actual gas pressure after supercharging and the current actual gas pressure before supercharging;

[0040] A first correction unit, configured to determine the current intake air volume of the supercharger as the sum of the current intake air volume of the engine and a first correction amount when it is determined that there is air leakage after the supercharger pressure; wherein, the first correction amount is the result of multiplying the difference between the actual gas pressure before the current supercharging and the theoretical gas pressure before the current supercharging by a calibrated proportionality coefficient; the calibrated proportionality coefficient is the proportionality coefficient between the gas pressure before the supercharger and the intake air volume of the engine.

[0041] A transient condition detection unit, configured to determine whether the current condition of the combined operation of the engine and the supercharger is a transient condition.

[0042] A second correction unit, configured to correct the current intake air volume of the supercharger by using a second correction amount corresponding to the current throttle change rate and the current engine speed when the current condition of the combined operation of the engine and the supercharger is a transient condition; wherein, the second correction amount is pre-calculated based on the difference between the theoretical flow rate and the measured actual flow rate of the supercharger under transient conditions.

[0043] A first lookup unit, configured to look up a speed that matches the current intake air volume and the current pressure ratio of the supercharger from the speed pulse diagram corresponding to the supercharger, to obtain the current speed of the supercharger; wherein, the speed pulse diagram is obtained through tests under the combined operation of the engine and the supercharger.

[0044] Optionally, in the above-mentioned supercharger speed monitoring device, the air leakage detection unit includes:

[0045] A comparison unit, configured to determine whether the actual parameter meets each preset condition by comparing the actual parameter with the theoretical parameter; wherein, the preset conditions include that the current actual opening degree of the supercharger is greater than the product of the current theoretical opening degree of the supercharger and an opening degree abnormal coefficient, and not greater than the current maximum theoretical opening degree of the supercharger, the current actual gas pressure before the supercharging is less than the product of the current theoretical gas pressure before the supercharging and a pressure abnormal coefficient, and the current actual gas temperature after the supercharger vortex is greater than the current theoretical gas temperature after the supercharger vortex.

[0046] A second determination unit, configured to determine that there is air leakage after the supercharger pressure when it is determined that the actual parameter meets each preset condition.

[0047] A third determination unit, configured to determine that there is no air leakage after the supercharger pressure when it is determined that the actual parameter does not meet any one of the preset conditions.

[0048] Optionally, in the above-mentioned supercharger speed monitoring device, the pressure ratio calculation unit includes:

[0049] A pressure ratio calculation subunit, configured to divide the sum of the current actually supercharged gas pressure and the current atmospheric pressure by the sum of the current actually gas pressure before supercharging and the current atmospheric pressure, to obtain the current pressure ratio of the supercharger.

[0050] Optionally, in the above-mentioned supercharger speed monitoring device, the transient condition detection unit includes:

[0051] A transient condition detection subunit, configured to determine whether the current throttle change rate is less than a preset change rate and whether the current throttle opening change amount is less than a preset change amount; wherein, if it is determined that the current throttle change rate is not less than the preset change rate and the current throttle opening change amount is not less than the preset change amount, it is determined that the current condition of the combined operation of the engine and the supercharger is a transient condition.

[0052] Optionally, in the above-mentioned supercharger speed monitoring device, the second correction unit includes:

[0053] A second lookup unit, configured to look up a second correction amount map corresponding to the temperature range in which the current actually post-compression gas temperature of the supercharger is located;

[0054] A third lookup unit, configured to look up a corresponding second correction amount from the correction amount map based on the current throttle change rate and the current speed of the engine;

[0055] A correction calculation unit, configured to add the current intake air volume of the supercharger to the product of the current intake air volume of the supercharger and the found second correction amount, to obtain the corrected current intake air volume of the supercharger.

[0056] Optionally, in the above-mentioned supercharger speed monitoring device, it further includes:

[0057] A speed judgment unit, configured to judge whether the current speed of the supercharger is greater than a preset speed;

[0058] An alarm unit, configured to send a first signal to the vehicle electronic control unit when it is judged that the supercharger speed is greater than the preset speed, so as to trigger the vehicle electronic control unit to display an alarm through the instrument; wherein, the first signal indication includes the current speed of the supercharger;

[0059] A feedback unit, configured to send a second signal to the vehicle electronic control unit when the current speed of the supercharger is not greater than the preset speed, so as to trigger the vehicle electronic control unit to determine whether to display the current speed of the supercharger in the second signal on the instrument based on a preset rule.

[0060] The third aspect of the present application provides an electronic device, including:

[0061] Memory and processor;

[0062] Wherein, the memory is used for storing a program;

[0063] The processor is used for executing the program, and when the program is executed, it is specifically used for implementing the supercharger speed monitoring method described in any one of the above.

[0064] The fourth aspect of the present application provides a computer storage medium for storing a computer program, and when the computer program is executed, it is used for implementing the supercharger speed monitoring method described in any one of the above.

[0065] A supercharger speed monitoring method provided by an embodiment of the present application includes obtaining various actual parameters of the current supercharger and the current speed, current torque, and current intake air volume of the engine. Then, according to the current speed and current torque of the engine, the cyclic fuel supply amount of the engine is determined, and based on the cyclic fuel supply amount and the current speed of the engine, various theoretical parameters of the current supercharger are determined. Since if there is air leakage, there is a relatively large difference between the actual parameters and the theoretical parameters, so by comparing the actual parameters with the theoretical parameters, it is determined whether there is air leakage after the supercharger compression. If there is no air leakage, the current intake air volume of the engine can be directly determined as the current intake air volume of the supercharger, and the current pressure ratio of the supercharger is calculated. Wherein, the current pressure ratio of the supercharger is calculated based on the actual gas pressure after current supercharging and the actual gas pressure before current supercharging, and the atmospheric pressure is no longer used instead. If there is air leakage, the sum of the current intake air volume of the engine and the first correction amount is determined as the current intake air volume of the supercharger to correct the error caused by air leakage. Then it is judged whether the current working condition of the combined operation of the engine and the supercharger is a transient working condition. If it is a transient working condition, the current intake air volume of the supercharger is corrected by using the current throttle change rate and the second correction amount corresponding to the current speed of the engine, so as to correct the influence brought by the transient working condition. Finally, from the speed pulse spectrum diagram corresponding to the supercharger, the speed matching the current intake air volume and the current pressure ratio of the supercharger is found, and the current speed of the supercharger is obtained. Moreover, in this solution, the speed pulse spectrum diagram is obtained through tests under the combined operation of the engine and the supercharger, considering the influence of the two in the combined operation, so an effective supercharger speed monitoring method with guaranteed accuracy is realized. Description of the Drawings

[0066] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0067] Figure 1 Schematic structural diagram of a diagnostic system provided by an embodiment of the present application;

[0068] Figure 2 Flowchart of a method for monitoring the rotational speed of a supercharger provided by another embodiment of the present application;

[0069] Figure 3 Flowchart of a method for determining whether there is air leakage after the supercharger pressure is increased provided by another embodiment of the present application;

[0070] Figure 4 Flowchart of a method for correcting the current intake air volume of a supercharger provided by another embodiment of the present application;

[0071] Figure 5 Schematic structural diagram of a device for monitoring the rotational speed of a supercharger provided by another embodiment of the present application;

[0072] Figure 6 Schematic structural diagram of an electronic device provided by another embodiment of the present application. Detailed implementation manners

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0074] In the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0075] An embodiment of the present application provides a method for monitoring the speed of a supercharger to solve the problem that the accuracy of the speed of the supercharger monitored by the existing method is relatively low.

[0076] Optionally, in order to implement the method for monitoring the speed of the supercharger provided by the embodiment of the present application, the embodiment of the present application provides a diagnostic system. As Figure 1 shown, the diagnostic system provided by the embodiment of the present application includes:

[0077] 1 - Engine; 2 - Exhaust pipe line in front of the supercharger turbine; 3 - Variable geometry turbine of the supercharger; 4 - Exhaust pipe line behind the supercharger turbine; 5 - Exhaust gas temperature sensor behind the supercharger turbine; 6 - Compressor of the supercharger; 7 - Intake pipe line in front of the supercharger compressor; 8 - Intake air pressure sensor in front of the supercharger compressor; 9 - Engine electronic control unit ECU; 10 - Intake pipe line behind the supercharger compressor; 11 - Intake air pressure and temperature sensor behind the supercharger compressor; 12 - Vehicle electronic control unit VCU; 13 - Vehicle instrument display.

[0078] It should be noted that the diagnostic system provided by the embodiment of the present application is only one optional method, and other structures can also be adopted. Or on the basis of this structure, other sensors or other components can be set according to requirements.

[0079] Based on the above - provided diagnostic system, an embodiment of the present application provides a method for monitoring the speed of a supercharger, as Figure 2 shown, including the following steps:

[0080] S201. Obtain each actual parameter of the current supercharger and the current speed, current torque, and current intake air volume of the engine.

[0081] Among them, the actual parameters at least include the actual gas pressure before supercharging currently, the actual gas pressure after supercharging currently, the actual gas temperature after the supercharger turbine currently, and the actual opening of the supercharger currently. Of course, other parameters can also be included in the actual parameters, such as the actual gas temperature after compression currently. And if necessary, in addition to obtaining the above - mentioned parameters, other required parameters can also be obtained, such as atmospheric pressure and atmospheric temperature, etc.

[0082] It should be noted that the actual parameters refer to the parameters obtained by actual measurement or the parameters further calculated from the parameters obtained by actual measurement.

[0083] See Figure 1, in the embodiments of the present application, "before compression" refers to the state before being pressurized by the supercharger compressor. Therefore, the pressure and temperature before compression are the pressure and temperature of the gas at the inlet of the supercharger compressor. Similarly, "after compression" refers to the state after being pressurized by the supercharger compressor. Therefore, the pressure and temperature after compression are the pressure and temperature of the gas at the outlet of the supercharger compressor. "After the turbine" refers to the state after the turbine of the supercharger. Therefore, the pressure and temperature after the turbine refer to the pressure and temperature at the outlet of the turbine of the supercharger.

[0084] Optionally, the current intake air volume of the engine can be directly measured by a sensor, or calculated based on the ideal gas state equation using the actual gas pressure after current supercharging and the actual gas temperature after current supercharging. At this time, the actual parameters obtained should also include the actual gas temperature after current supercharging.

[0085] S202. Determine the fuel injection quantity per cycle of the engine according to the current engine speed and current torque.

[0086] Since the various theoretical parameters are determined based on the fuel injection quantity per cycle of the engine and the engine speed, first determine the fuel injection quantity per cycle of the engine according to the current engine speed and current torque. Specifically, it can be calculated by using the current engine speed and current torque to obtain the fuel injection quantity per cycle of the engine. It can also be that the fuel injection quantity per cycle of the engine at various engine speeds and torques has been pre-calculated, so that the corresponding fuel injection quantity per cycle of the engine can be directly found according to the current engine speed and current torque.

[0087] S203. Determine the various theoretical parameters of the current supercharger according to the fuel injection quantity per cycle of the engine and the current engine speed.

[0088] Among them, the theoretical parameters refer to the parameters in the case of no abnormalities or faults, etc. Specifically, they can include the maximum theoretical opening of the current supercharger, the theoretical gas pressure before current supercharging, the theoretical gas temperature after the turbine of the current supercharger, and the theoretical opening of the current supercharger.

[0089] It should be noted that most of the theoretical parameters are fixed values pre-calibrated at various fuel injection quantities per cycle and engine speeds. Therefore, the corresponding theoretical parameters can be directly found according to the fuel injection quantity per cycle of the engine and the current engine speed.

[0090] Optionally, considering the influence of the ambient temperature on the theoretical parameters, the theoretical parameters at different ambient temperatures can be determined. Thus, when specifically determining the current theoretical parameters, based on the current atmospheric temperature, the corresponding set of theoretical parameters can be searched, and the various theoretical parameters corresponding to the fuel injection quantity per cycle and the current engine speed can be determined from it.

[0091] S204. Determine whether there is air leakage after the supercharger compression by comparing the actual parameters with the theoretical parameters.

[0092] Since the actual parameter is the currently measured parameter and the theoretical parameter is the parameter under the condition of no abnormal fault, etc., if there is air leakage after the supercharger boost, the error between the actual parameter and the theoretical parameter will be relatively large. Therefore, in the embodiment of the present application, by comparing the actual parameter with the theoretical parameter, it is determined whether there is air leakage after the supercharger boost.

[0093] Among them, if it is determined that there is air leakage after the supercharger boost, the gas flow needs to be corrected, so step S206 is executed at this time. If it is determined that there is no air leakage after the supercharger boost, step S205 can be directly executed.

[0094] Optionally, as Figure 3 shown, a specific implementation manner of step S204 includes:

[0095] S301. By comparing the actual parameter with the theoretical parameter, it is judged whether the actual parameter meets each preset condition.

[0096] Among them, in order to accurately determine whether there is air leakage after the supercharger boost, in the embodiment of the present application, there are three preset conditions. The first one is: the actual opening of the current supercharger is greater than the product of the theoretical opening of the current supercharger and the opening abnormal coefficient, and not greater than the maximum theoretical opening of the current supercharger. The second one is: the actual gas pressure before the current supercharger is less than the product of the theoretical gas pressure before the current supercharger and the pressure abnormal coefficient. The third one is: the actual gas temperature after the turbine of the current supercharger is greater than the theoretical gas temperature after the turbine of the current supercharger.

[0097] Due to the influence of various factors, it is normal that there are certain differences between the actual parameter and the theoretical parameter to a certain extent. Therefore, in the preset conditions, corresponding abnormal boundary coefficients are set to determine that the preset conditions are met only when the difference degree between the two is relatively large.

[0098] If it is judged that the actual parameter meets each preset condition, step S302 is executed. If it is judged that the actual parameter does not meet any one of the preset conditions, step S303 is executed.

[0099] S302. It is determined that there is air leakage after the supercharger boost.

[0100] S303. It is determined that there is no air leakage after the supercharger boost.

[0101] S205. Determine the current intake air volume of the engine as the current intake air volume of the supercharger, and calculate the current pressure ratio of the supercharger.

[0102] Since there is no air leakage, the current intake air volume of the engine is the current intake air volume of the supercharger. Therefore, the current intake air volume of the engine can be directly determined as the current intake air volume of the supercharger. And at the same time, calculate the current pressure ratio of the supercharger.

[0103] Wherein, the current pressure ratio of the supercharger is calculated based on the actual gas pressure after current supercharging and the actual gas pressure before current supercharging.

[0104] Optionally, in another embodiment of the present application, a specific way to calculate the current pressure ratio of the supercharger is:

[0105] Divide the sum of the actual gas pressure after current supercharging and the current atmospheric pressure by the sum of the actual gas pressure before current supercharging and the current atmospheric pressure to obtain the current pressure ratio of the supercharger.

[0106] Since it is considered that the measured actual gas pressure after current supercharging and the actual gas pressure before current supercharging are usually gauge pressures, in the embodiments of the present application, the measured value is added with the current atmospheric pressure to obtain the absolute pressure. Then calculate the ratio of the absolute pressure after supercharging to the absolute pressure before supercharging to obtain the current pressure ratio of the supercharger.

[0107] S206. Determine the sum of the current intake air volume of the engine and the first correction amount as the current intake air volume of the supercharger, and calculate the current pressure ratio of the supercharger.

[0108] Since there is air leakage at this time, the measured value is not accurate, so correction is needed. Therefore, in the embodiments of the present application, first calculate the first correction amount, and then calculate the sum of the current intake air volume of the engine and the first correction amount to obtain the corrected intake air volume.

[0109] Wherein, the first correction amount is the result of multiplying the difference between the actual gas pressure before current supercharging and the theoretical gas pressure before current supercharging by the calibrated proportionality coefficient. The calibrated proportionality coefficient is the proportionality coefficient between the gas pressure before supercharging of the supercharger and the intake air volume of the engine under normal conditions, that is, when there is no air leakage. So it can be obtained through experiments specifically.

[0110] S207. Determine whether the current working condition of the combined operation of the engine and the supercharger is a transient working condition.

[0111] Considering the problem of delay in transient conditions, in the embodiments of the present application, after performing step S205 or step S206, it is further determined whether the current condition of the combined operation of the engine and the supercharger is a transient condition. Among them, if it is determined that the current condition of the combined operation of the engine and the supercharger is a transient condition, it is further necessary to correct the error caused by the transient condition. Therefore, step S208 needs to be executed first at this time. If it is determined that the current condition of the combined operation of the engine and the supercharger is not a transient condition, step S209 can be executed.

[0112] Since the throttle opening can well reflect whether the vehicle is in a transient condition, optionally, in another embodiment of the present application, a specific implementation manner of step S207 includes:

[0113] Determine whether the current throttle change rate is less than the preset change rate, and whether the current throttle opening change amount is less than the preset change amount.

[0114] Among them, if it is determined that the current throttle change rate is not less than the preset change rate, and the current throttle opening change amount is not less than the preset change amount, it is determined that the current condition of the combined operation of the engine and the supercharger is a transient condition.

[0115] S208. Use the current throttle change rate and the second correction amount corresponding to the current engine speed to correct the current intake air volume of the supercharger.

[0116] Among them, the second correction amount is pre-calculated based on the difference between the theoretical flow rate and the measured actual flow rate of the supercharger under transient conditions. Therefore, the intake air volume can be corrected based on the second correction amount to eliminate the influence brought by the transient condition.

[0117] Specifically, according to the difference between the theoretical flow rate and the measured actual flow rate under transient conditions of different throttle change rates and engine speeds, the second correction amounts corresponding to each throttle change rate and engine speed are calculated.

[0118] Optionally, in another embodiment of the present application, a specific implementation manner of step S208 is as Figure 4 shown and includes:

[0119] S401. Find the second correction amount map corresponding to the temperature range where the current actual post-compression gas temperature of the supercharger is located.

[0120] It should be noted that since the amount to be modified is different under different post-compression gas temperatures, in the embodiments of the present application, the difference between the actual flow rate and the theoretical flow rate under different throttle change rates and engine speed conditions is pre-calculated in different temperature ranges, and the corresponding second correction amounts are calculated, and then the second correction amount maps corresponding to different temperature ranges are generated.

[0121] S402. Based on the current throttle change rate and the current engine speed, find the corresponding second correction amount from the correction amount map.

[0122] S403. Add the product of the current intake air volume of the supercharger and the found second correction amount to the current intake air volume of the supercharger to obtain the corrected current intake air volume of the supercharger.

[0123] S209. From the speed map corresponding to the supercharger, find the speed that matches the current intake air volume and the current pressure ratio of the supercharger to obtain the current speed of the supercharger.

[0124] Among them, the speed map (MAP) is obtained through tests under the combined operation of the engine and the supercharger, so the influence existing under their combined operation is fully considered.

[0125] Optionally, in another embodiment of the present application, after performing step S209, it may further include:

[0126] Judge whether the current speed of the supercharger is greater than the preset speed.

[0127] If it is judged that the supercharger is greater than the preset speed, send a first signal to the vehicle electronic control unit to trigger the vehicle electronic control unit to display an alarm through the instrument. Among them, the first signal indication includes the current speed of the supercharger.

[0128] If the current speed of the supercharger is not greater than the preset speed, send a second signal to the vehicle electronic control unit to trigger the vehicle electronic control unit to determine whether to display the current speed of the supercharger in the second signal on the instrument based on a preset rule. Since the limit has not been exceeded at this time, whether to display it can set corresponding rules according to requirements.

[0129] The embodiment of the present application provides a method for monitoring the speed of a supercharger, and obtains various actual parameters of the current supercharger and the current speed, current torque, and current intake volume of the engine. Among them, the actual parameters at least include the actual gas pressure before the current supercharging, the actual gas pressure after the current supercharging, the actual gas temperature after the current supercharger vortex, and the actual opening of the current supercharger. Then, according to the current speed and current torque of the engine, the circulating fuel supply of the engine is determined, so as to determine various theoretical parameters of the current supercharger according to the circulating fuel supply and current speed of the engine. Among them, the theoretical parameters include the current maximum theoretical opening of the supercharger, the theoretical gas pressure before the current supercharging, the theoretical gas temperature after the current supercharger vortex, and the current theoretical opening of the supercharger. Since there is a relatively large difference between the actual parameters and the theoretical parameters, it is determined by comparing the actual parameters with the theoretical parameters whether there is a leak after the supercharger is compressed. If it is determined that there is no leak after the supercharger is compressed, the current intake volume of the engine can be directly determined as the current intake volume of the supercharger, and the current pressure ratio of the supercharger is calculated. Wherein, the current pressure ratio of the supercharger is calculated based on the actual gas pressure after the current supercharging and the actual gas pressure before the current supercharging, and the atmospheric pressure is no longer used instead. If it is determined that there is leakage after the supercharger is compressed, the sum of the current intake volume of the engine and the first correction amount is determined as the current intake volume of the supercharger, so as to correct the error caused by the leakage. Wherein, the first correction amount is the difference between the actual gas pressure before the current supercharging and the theoretical gas pressure before the current supercharging, multiplied by the calibration proportional coefficient, and the calibration proportional coefficient is the proportional coefficient between the gas pressure before the supercharger and the intake volume of the engine. Then, it is determined whether the current working condition of the engine and the supercharger is a transient working condition. If the current working condition of the engine and the supercharger is a transient working condition, the current intake volume of the supercharger is corrected by using the second correction amount corresponding to the current throttle change rate and the current speed of the engine, so as to correct the influence caused by the transient working condition. Wherein, the second correction amount is calculated in advance based on the difference between the theoretical flow rate of the supercharger and the measured actual flow rate under the transient working condition. Finally, from the speed spectrum corresponding to the supercharger, the speed matching the current air intake volume and the current pressure ratio of the supercharger is found to obtain the current speed of the supercharger. In addition, the speed spectrum in this scheme is obtained by testing under the joint operation of the engine and the supercharger, taking into account the influence of the two on the joint operation, thereby realizing a supercharger speed monitoring method that effectively ensures accuracy.

[0130] Another embodiment of the present application provides a monitoring device for supercharger speed, such as Figure 5 As shown, including:

[0131] The actual parameter acquisition unit 501 is used to acquire various actual parameters of the current supercharger and the current speed, current torque, and current intake volume of the engine.

[0132] Among them, the actual parameters at least include the actual gas pressure before current supercharging, the actual gas pressure after current supercharging, the actual gas temperature after the turbine of the current supercharger, and the actual opening degree of the current supercharger.

[0133] The fuel supply amount determination unit 502 is used to determine the cyclic fuel supply amount of the engine according to the current speed and current torque of the engine.

[0134] The theoretical parameter determination unit 503 is used to determine each theoretical parameter of the current supercharger according to the cyclic fuel supply amount of the engine and the current speed.

[0135] Among them, the theoretical parameters include the maximum theoretical opening degree of the current supercharger, the theoretical gas pressure before current supercharging, the theoretical gas temperature after the turbine of the current supercharger, and the theoretical opening degree of the current supercharger.

[0136] The air leakage detection unit 504 is used to determine whether there is air leakage after the compressor of the supercharger by comparing the actual parameters with the theoretical parameters.

[0137] The first determination unit 505 is used to determine the current intake air volume of the engine as the current intake air volume of the supercharger when it is determined that there is no air leakage after the compressor of the supercharger.

[0138] The pressure ratio calculation unit 506 is used to calculate the current pressure ratio of the supercharger.

[0139] Among them, the current pressure ratio of the supercharger is calculated based on the actual gas pressure after current supercharging and the actual gas pressure before current supercharging.

[0140] The first correction unit 507 is used to determine the sum of the current intake air volume of the engine and the first correction amount as the current intake air volume of the supercharger when it is determined that there is air leakage after the compressor of the supercharger.

[0141] Among them, the first correction amount is the result of multiplying the difference between the actual gas pressure before current supercharging and the theoretical gas pressure before current supercharging by the calibrated proportionality coefficient. The calibrated proportionality coefficient is the proportionality coefficient between the gas pressure before supercharging of the supercharger and the intake air volume of the engine.

[0142] The transient condition detection unit 508 is used to judge whether the current condition of the combined operation of the engine and the supercharger is a transient condition.

[0143] The second correction unit 509 is used to correct the current intake air volume of the supercharger by using the second correction amount corresponding to the current throttle change rate and the current speed of the engine when the current condition of the combined operation of the engine and the supercharger is a transient condition.

[0144] Among them, the second correction amount is pre-calculated based on the difference between the theoretical flow rate and the measured actual flow rate of the supercharger under transient conditions.

[0145] The first search unit 510 is configured to search, from the rotational speed spectrum diagram corresponding to the supercharger, for the rotational speed that matches the current intake air volume and the current pressure ratio of the supercharger, so as to obtain the current rotational speed of the supercharger.

[0146] Wherein, the rotational speed spectrum diagram is obtained through tests under the combined operation of the engine and the supercharger.

[0147] Optionally, in the supercharger rotational speed monitoring device provided in another embodiment of the present application, the air leakage detection unit includes:

[0148] A comparison unit, configured to determine whether the actual parameters meet each preset condition by comparing the actual parameters with the theoretical parameters.

[0149] Wherein, the preset conditions include that the actual opening degree of the current supercharger is greater than the product of the theoretical opening degree of the current supercharger and the opening degree abnormal coefficient, and not greater than the maximum theoretical opening degree of the current supercharger, the actual gas pressure before supercharging is less than the product of the theoretical gas pressure before supercharging and the pressure abnormal coefficient, and the actual gas temperature after the turbine of the current supercharger is greater than the theoretical gas temperature after the turbine of the current supercharger.

[0150] A second determination unit, configured to determine that there is air leakage after the supercharger pressure when it is determined that the actual parameters meet each preset condition.

[0151] A third determination unit, configured to determine that there is no air leakage after the supercharger pressure when it is determined that the actual parameters do not meet any one of the preset conditions.

[0152] Optionally, in the supercharger rotational speed monitoring device provided in another embodiment of the present application, the pressure ratio calculation unit includes:

[0153] A pressure ratio calculation sub-unit, configured to divide the sum of the actual gas pressure after current supercharging and the current atmospheric pressure by the sum of the actual gas pressure before current supercharging and the current atmospheric pressure, so as to obtain the current pressure ratio of the supercharger.

[0154] Optionally, in the supercharger rotational speed monitoring device provided in another embodiment of the present application, the transient condition detection unit includes:

[0155] A transient condition detection sub-unit, configured to determine whether the current throttle change rate is less than a preset change rate and whether the current throttle opening change amount is less than a preset change amount. Wherein, if it is determined that the current throttle change rate is not less than the preset change rate and the current throttle opening change amount is not less than the preset change amount, it is determined that the current condition of the combined operation of the engine and the supercharger is a transient condition.

[0156] Optionally, in the supercharger rotational speed monitoring device provided in another embodiment of the present application, the second correction unit includes:

[0157] A second search unit, configured to search for a second correction quantity map corresponding to the temperature range in which the current actual gas temperature after the supercharger is located.

[0158] A third search unit, configured to search for a corresponding second correction quantity from the correction quantity map based on the current throttle change rate and the current engine speed.

[0159] A correction calculation unit, configured to add the current intake air volume of the supercharger to the product of the current intake air volume of the supercharger and the found second correction quantity, so as to obtain the corrected current intake air volume of the supercharger.

[0160] Optionally, in the supercharger speed monitoring device provided in another embodiment of the present application, it further includes:

[0161] A speed judgment unit, configured to judge whether the current speed of the supercharger is greater than a preset speed.

[0162] An alarm unit, configured to send a first signal to the vehicle electronic control unit when it is judged that the supercharger is greater than the preset speed, so as to trigger the vehicle electronic control unit to display an alarm through the instrument.

[0163] Wherein, the first signal indicates including the current speed of the supercharger.

[0164] A feedback unit, configured to send a second signal to the vehicle electronic control unit when the current speed of the supercharger is not greater than the preset speed, so as to trigger the vehicle electronic control unit to determine whether to display the current speed of the supercharger in the second signal on the instrument based on a preset rule.

[0165] It should be noted that for the specific working processes of the various units provided in the above embodiments of the present application, reference can be made to the corresponding steps in the above method embodiments, which will not be elaborated here.

[0166] Another embodiment of the present application provides an electronic device, as Figure 6 shown, including:

[0167] A memory 601 and a processor 602.

[0168] Wherein, the memory 601 is used to store programs.

[0169] The processor 602 is configured to execute the programs stored in the memory 601. When the programs are executed, it is specifically configured to implement the supercharger speed monitoring method provided in any one of the above embodiments.

[0170] Another embodiment of the present application provides a computer storage medium, which is used to store computer programs. When the computer programs are executed, they are used to implement the supercharger speed monitoring method provided in any one of the above embodiments.

[0171] Computer storage media includes both permanent and non-permanent, removable and non-removable media and can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disks storage or other magnetic storage devices, or any other non-transitory medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves.

[0172] Those skilled in the art can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0173] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for monitoring the rotational speed of a supercharger, characterized in that, Including: Obtain various actual parameters of the current supercharger, as well as the current engine speed, current torque, and current intake air volume; wherein, the actual parameters at least include the actual gas pressure before current supercharging, the actual gas pressure after current supercharging, the actual gas temperature after the turbine of the current supercharger, and the actual opening degree of the current supercharger; Determine the cyclic fuel supply of the engine according to the current engine speed and current torque; Determine various theoretical parameters of the current supercharger according to the cyclic fuel supply of the engine and the current speed; wherein, the theoretical parameters include the maximum theoretical opening degree of the current supercharger, the theoretical gas pressure before current supercharging, the theoretical gas temperature after the turbine of the current supercharger, and the theoretical opening degree of the current supercharger; Determine whether there is air leakage after the supercharger compression by comparing the actual parameters with the theoretical parameters; If it is determined that there is no air leakage after the supercharger compression, determine the current intake air volume of the engine as the current intake air volume of the supercharger, and calculate the current pressure ratio of the supercharger; wherein, the current pressure ratio of the supercharger is calculated based on the actual gas pressure after current supercharging and the actual gas pressure before current supercharging; If it is determined that there is air leakage after the supercharger compression, determine the sum of the current intake air volume of the engine and the first correction amount as the current intake air volume of the supercharger, and calculate the current pressure ratio of the supercharger; wherein, the first correction amount is the result of multiplying the difference between the actual gas pressure before current supercharging and the theoretical gas pressure before current supercharging by the calibrated proportionality coefficient; the calibrated proportionality coefficient is the proportionality coefficient between the gas pressure before supercharging of the supercharger and the intake air volume of the engine; Judge whether the current working condition of the combined operation of the engine and the supercharger is a transient working condition; If the current working condition of the combined operation of the engine and the supercharger is a transient working condition, correct the current intake air volume of the supercharger by using the current throttle change rate and the second correction amount corresponding to the current engine speed; wherein, the second correction amount is pre-calculated based on the difference between the theoretical flow rate and the measured actual flow rate of the supercharger under transient working conditions; Search for the speed matching the current intake air volume and current pressure ratio of the supercharger from the speed map corresponding to the supercharger to obtain the current speed of the supercharger; wherein, the speed map is obtained through tests under the combined operation of the engine and the supercharger.

2. The method according to claim 1, wherein The determining whether there is air leakage after the supercharger compression by comparing the actual parameters with the theoretical parameters includes: Judge whether the actual parameters meet various preset conditions by comparing the actual parameters with the theoretical parameters; wherein, the preset conditions include that the actual opening degree of the current supercharger is greater than the product of the theoretical opening degree of the current supercharger and the opening degree abnormal coefficient and not greater than the maximum theoretical opening degree of the current supercharger, the actual gas pressure before current supercharging is less than the product of the theoretical gas pressure before current supercharging and the pressure abnormal coefficient, and the actual gas temperature after the turbine of the current supercharger is greater than the theoretical gas temperature after the turbine of the current supercharger; If it is determined that the actual parameters meet each preset condition, it is determined that there is air leakage after the supercharger boost; If it is determined that the actual parameters do not meet any one of the preset conditions, it is determined that there is no air leakage after the supercharger boost.

3. The method according to claim 1, characterized in that The calculating the current pressure ratio of the supercharger includes: Dividing the sum of the current actual gas pressure after supercharging and the current atmospheric pressure by the sum of the current actual gas pressure before supercharging and the current atmospheric pressure to obtain the current pressure ratio of the supercharger.

4. The method according to claim 1, characterized in that, The determining whether the current working condition of the combined operation of the engine and the supercharger is a transient working condition includes: Judging whether the current throttle change rate is less than a preset change rate and whether the current throttle opening change amount is less than a preset change amount; wherein, if it is determined that the current throttle change rate is not less than the preset change rate and the current throttle opening change amount is not less than the preset change amount, it is determined that the current working condition of the combined operation of the engine and the supercharger is a transient working condition.

5. The method according to claim 1, characterized in that, The correcting the current intake air volume of the supercharger by using the current throttle change rate and the second correction amount corresponding to the current engine speed includes: Searching for a second correction amount map corresponding to the temperature range in which the current actual gas temperature after supercharging of the supercharger is located; Based on the current throttle change rate and the current engine speed, searching for the corresponding second correction amount from the correction amount map; Adding the product of the current intake air volume of the supercharger and the found second correction amount to the current intake air volume of the supercharger to obtain the corrected current intake air volume of the supercharger.

6. The method according to claim 1, wherein After finding the speed matching the current intake air volume and the current pressure ratio of the supercharger from the speed map corresponding to the supercharger to obtain the current speed of the supercharger, it further includes: Judging whether the current speed of the supercharger is greater than a preset speed; If it is determined that the supercharger is greater than the preset speed, sending a first signal to the vehicle electronic control unit to trigger the vehicle electronic control unit to display an alarm through the instrument; wherein, the first signal indication includes the current speed of the supercharger; If the current speed of the supercharger is not greater than the preset speed, sending a second signal to the vehicle electronic control unit to trigger the vehicle electronic control unit to determine whether to display the current speed of the supercharger in the second signal on the instrument based on a preset rule.

7. A monitoring device for the rotational speed of a supercharger, characterized in that, including: An actual parameter acquisition unit for acquiring various actual parameters of the current supercharger and the current engine speed, current torque, and current intake air volume of the engine; wherein, the actual parameters at least include the current actual gas pressure before supercharging, the current actual gas pressure after supercharging, the current actual gas temperature after the supercharger turbine, and the current actual opening of the supercharger; An oil supply amount determination unit for determining the cyclic oil supply amount of the engine according to the current engine speed and current torque; A theoretical parameter determination unit for determining various theoretical parameters of the current supercharger according to the cyclic oil supply amount and the current engine speed of the engine; wherein, the theoretical parameters include the current maximum theoretical opening of the supercharger, the current theoretical gas pressure before supercharging, the current theoretical gas temperature after the supercharger turbine, and the current theoretical opening of the supercharger; An air leakage detection unit, configured to determine whether there is air leakage after the supercharger by comparing the actual parameters with the theoretical parameters; A first determination unit, configured to determine the current intake air volume of the engine as the current intake air volume of the supercharger when it is determined that there is no air leakage after the supercharger; A pressure ratio calculation unit, configured to calculate the current pressure ratio of the supercharger; wherein, the current pressure ratio of the supercharger is calculated based on the current actual gas pressure after supercharging and the current actual gas pressure before supercharging; A first correction unit, configured to determine the sum of the current intake air volume of the engine and a first correction amount as the current intake air volume of the supercharger when it is determined that there is air leakage after the supercharger; wherein, the first correction amount is the result of multiplying the difference between the current actual gas pressure before supercharging and the current theoretical gas pressure before supercharging by a calibrated proportionality coefficient; the calibrated proportionality coefficient is the proportionality coefficient between the gas pressure before supercharging of the supercharger and the intake air volume of the engine; A transient condition detection unit, configured to determine whether the current condition of the combined operation of the engine and the supercharger is a transient condition; A second correction unit, configured to correct the current intake air volume of the supercharger by using a second correction amount corresponding to the current throttle change rate and the current engine speed when the current condition of the combined operation of the engine and the supercharger is a transient condition; wherein, the second correction amount is pre-calculated based on the difference between the theoretical flow rate and the measured actual flow rate of the supercharger under transient conditions; A first search unit, configured to search for a speed matching the current intake air volume and the current pressure ratio of the supercharger from the speed pulse diagram corresponding to the supercharger to obtain the current speed of the supercharger; wherein, the speed pulse diagram is obtained through tests under the combined operation of the engine and the supercharger.

8. The device according to claim 7, characterized in that, The air leakage detection unit includes: A comparison unit, configured to determine whether the actual parameters meet each preset condition by comparing the actual parameters with the theoretical parameters; wherein, the preset conditions include that the current actual opening of the supercharger is greater than the product of the current theoretical opening of the supercharger and an opening abnormal coefficient and not greater than the current maximum theoretical opening of the supercharger, the current actual gas pressure before supercharging is less than the product of the current theoretical gas pressure before supercharging and a pressure abnormal coefficient, and the current actual gas temperature after the supercharger vortex is greater than the current theoretical gas temperature after the supercharger vortex; A second determination unit, configured to determine that there is air leakage after the supercharger when it is determined that the actual parameters meet each preset condition; A third determination unit, configured to determine that there is no air leakage after the supercharger when it is determined that the actual parameters do not meet any one of the preset conditions.

9. An electronic device, characterized in that, It includes: A memory and a processor; Wherein, the memory is used to store a program; The processor is used to execute the program, and when the program is executed, it is specifically used to implement the method for monitoring the speed of the supercharger as described in any one of claims 1 to 6.

10. A computer storage medium, characterized in that, For storing a computer program which, when executed, is used to implement the method for monitoring the supercharger speed according to any one of claims 1 to 6.

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