Valve control method and device, engine and vehicle

Abstract

The invention provides a valve control method and device, an engine and a vehicle, and belongs to the technical field of vehicles, when it is monitored that an air inlet bypass valve is stuck and lagged and cannot give an alarm immediately, the air inlet bypass valve is controlled to conduct self-cleaning, oil stains and foreign matter attached to the air inlet bypass valve are cleaned through self-cleaning, accidental foreign matter is avoided, and the service life of the air inlet bypass valve is prolonged. And fault misjudgment caused by oil gas coking and the like after pressure is avoided. If self-cleaning fails, a fault code is reported, an alarm prompt is not directly given according to the fault code, fault judgment contingency is avoided by determining the continuous period number of clamping stagnation of the air inlet bypass valve, the fault judgment accuracy is improved, and only when the continuous period number is larger than or equal to the preset safety frequency, the fault code is reported. According to the method, the fault of the air inlet bypass valve can be determined, alarm prompt is given, contingency of single judgment is avoided through continuous fault judgment, alarm prompt when the air inlet bypass valve is intact is avoided, the use cost is saved, and the use experience is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a valve control method, device, engine and vehicle. Background Art

[0002] The function of the intake bypass valve is to protect the supercharger. It is used in conjunction with the supercharger. When the throttle valve of the intake pressure pipeline is closed, the intake bypass valve is opened to discharge the high-pressure gas in the intake pressure pipeline into the environment, thereby protecting the intake pressure pipeline and the supercharger. Summary of the invention

[0003] In view of this, the purpose of the present application is to propose a valve control method, device, engine and vehicle, which are used to avoid false alarms of intake bypass valve failures, improve user experience and save usage costs.

[0004] Based on the above purpose, the present application provides a valve control method, comprising:

[0005] In response to monitoring that the intake bypass valve is stuck, controlling the intake bypass valve to perform self-cleaning to obtain a self-cleaning result;

[0006] In response to the self-cleaning result being a cleaning failure, reporting a fault code, and determining the number of consecutive cycles of the intake bypass valve being stuck;

[0007] In response to the number of consecutive cycles being greater than or equal to a preset safety number of times, it is determined that a fault exists in the intake bypass valve, and an alarm is issued.

[0008] Based on the same inventive concept, the present disclosure also provides a valve control device, comprising:

[0009] The self-cleaning control module is configured to: in response to monitoring that the intake bypass valve is stuck, control the intake bypass valve to perform self-cleaning to obtain a self-cleaning result;

[0010] a cycle number determination module, configured to: in response to the self-cleaning result being a cleaning failure, report a fault code, and determine the number of consecutive cycles of the intake bypass valve being stuck;

[0011] The alarm prompt module is configured to: in response to the number of consecutive cycles being greater than or equal to a preset safety number, determine that there is a fault in the intake bypass valve and issue an alarm prompt.

[0012] Based on the same inventive concept, the present disclosure also provides an engine, which is used to execute the method as described above.

[0013] Based on the same inventive concept, the present disclosure also provides a vehicle, comprising a control device or an engine of the valve as described above.

[0014] From the above, it can be seen that the control method, device, engine and vehicle of the valve provided by the present application, after detecting that the intake bypass valve is stuck, controls the intake bypass valve to perform self-cleaning and obtains a self-cleaning result; if the self-cleaning result is a cleaning failure, a fault code is reported, and the number of consecutive cycles of the intake bypass valve being stuck is determined; if the number of consecutive cycles is greater than or equal to the preset safety number of times, it is determined that the intake bypass valve is faulty, and an alarm is given. After detecting that the intake bypass valve is stuck, an alarm will not be given immediately, but the intake bypass valve will be controlled to perform self-cleaning, and the oil and foreign matter attached to the intake bypass valve will be cleaned by self-cleaning, so as to avoid misjudgment of faults caused by occasional foreign matter, oil and gas coking after compression, etc. If self-cleaning fails, it means that the intake bypass valve is stuck and not caused by foreign matter. A fault code will be reported, but an alarm will not be given directly based on the fault code. Instead, the number of consecutive cycles of the intake bypass valve being stuck is determined to avoid random fault judgment and improve the accuracy of fault judgment. Only when the number of consecutive cycles is greater than or equal to the preset safety number of times can it be determined that there is a fault in the intake bypass valve and an alarm will be given. Continuous fault judgments are used to avoid the randomness of single judgments, avoid the impact of misjudgments caused by loose connections in the wiring harness, avoid alarms when the intake bypass valve is intact, and avoid users from frequently replacing or repairing the intake bypass valve, thereby saving usage costs and improving usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a flow chart of a valve control method according to an embodiment of the present application;

[0017] Figure 2 A schematic diagram of a boosting system according to an embodiment of the present application;

[0018] Figure 3a A schematic diagram of an intake bypass valve in a closed state according to an embodiment of the present application;

[0019] Figure 3b A schematic diagram of an intake bypass valve in an open state according to an embodiment of the present application;

[0020] Figure 4 This is a flow chart of controlling the intake bypass valve after successful self-cleaning in an embodiment of the present application;

[0021] Figure 5This is a flow chart of controlling the intake bypass valve when the number of consecutive cycles in the embodiment of the present application is less than a preset safety number;

[0022] Figure 6 A flowchart of controlling the intake bypass valve to perform self-cleaning and obtaining a self-cleaning result according to an embodiment of the present application;

[0023] Figure 7 A flow chart for determining the number of consecutive cycles of an intake bypass valve being stuck according to an embodiment of the present application;

[0024] Figure 8 This is a schematic diagram of the structure of the control device of the valve in the embodiment of the present application;

[0025] Fig. 9 It is a schematic diagram of the engine according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] It should be understood herein that any number of elements in the drawings is for illustration rather than limitation, and any naming is only for distinction rather than having any limiting meaning.

[0029] Based on the description of the above background technology, the related technology also has the following situations:

[0030] In the related technology, the role of the intake bypass valve is to protect the supercharger. It is used in conjunction with the supercharger. When the throttle of the intake pressure pipeline is closed, the supercharger will be closed synchronously. However, due to inertia, the turbine blades of the supercharger cannot stop rotating instantly. The supercharger will continue to pressurize the intake pressure pipeline after the throttle is closed, resulting in a continuous increase in the pipeline pressure of the intake pressure pipeline. The pipeline pressure is maintained for a long time, causing a sudden increase in the pressure in the intake pressure pipeline. This may cause the high-pressure air in the intake pressure pipeline to flow back into the supercharger, causing surge phenomenon, and even damage the supercharger. Therefore, an intake bypass valve is set between the supercharger and the throttle to discharge the high-pressure air in the intake pressure pipeline.

[0031] The working principle of the intake bypass valve in the related art is as follows:

[0032] When the vehicle accelerates: the intake bypass valve is closed, and the high-pressure gas pressurized by the supercharger flows into the intake duct of the gas-using equipment through the intake pressure pipe;

[0033] When the vehicle decelerates: the intake bypass valve opens, and part of the high-pressure gas flows into the intake pressure front pipe through the intake bypass valve, and the high-pressure gas in the intake pressure rear pipe is discharged, which plays a role in pressure relief.

[0034] In the related technology, the control strategy for the intake bypass valve is as follows: after the throttle valve is closed, the intake bypass valve is opened by controlling the wiring harness to discharge the high-pressure gas in the intake pressure pipeline to relieve the pressure. At the same time, the pressure fluctuation in the intake pressure pipeline is monitored by the boost pressure sensor to determine whether the intake pressure pipeline has successfully relieved the pressure. If the pressure fluctuations are too frequent, it is determined that surge has occurred, and it is determined that the intake bypass valve has failed to open successfully. The intake bypass valve is stuck and the fault light corresponding to the intake bypass valve is lit to prompt the user to repair or replace the intake bypass valve.

[0035] The control strategy in the related technology can only judge failure through the boost pressure result, but fails to take into account the problem that the valve body of the intake bypass valve does not open due to other reasons such as control problems, wiring harness disconnection problems, foreign matter, and coking of oil and gas after compression, which in turn causes pressure fluctuations in the intake pressure pipeline. The judgment that there is a fault in the intake bypass valve is too simple and arbitrary, and it is impossible to accurately judge whether there is a hardware fault in the intake bypass valve. In addition, the control of whether the fault light is lit based on a single judgment result is too harsh for misjudgment caused by multiple uncertain factors, resulting in a large number of misjudgments during the use of the intake bypass valve, which in turn leads to the phenomenon of frequent replacement of the intake bypass valve, which increases the cost of using the vehicle and brings a poor user experience to users.

[0036] The valve control method, device, engine and vehicle provided in the present application, after detecting that the intake bypass valve is stuck, control the intake bypass valve to perform self-cleaning to obtain a self-cleaning result; if the self-cleaning result is a cleaning failure, report a fault code and determine the number of consecutive cycles of the intake bypass valve being stuck; if the number of consecutive cycles is greater than or equal to the preset safety number of times, determine that the intake bypass valve is faulty and give an alarm. After detecting that the intake bypass valve is stuck, the alarm will not be given immediately, but the intake bypass valve will be controlled to perform self-cleaning, and the oil and foreign matter attached to the intake bypass valve will be cleaned by self-cleaning to avoid misjudgment of faults caused by occasional foreign matter, post-compression oil and gas coking, etc. If self-cleaning fails, it means that the intake bypass valve is stuck and not caused by foreign matter. A fault code will be reported, but an alarm will not be given directly based on the fault code. Instead, the number of consecutive cycles of the intake bypass valve being stuck is determined to avoid random fault judgment and improve the accuracy of fault judgment. Only when the number of consecutive cycles is greater than or equal to the preset safety number of times can it be determined that there is a fault in the intake bypass valve and an alarm will be given. Continuous fault judgments are used to avoid the randomness of single judgments, avoid the impact of misjudgments caused by loose connections in the wiring harness, avoid alarms when the intake bypass valve is intact, and avoid users from frequently replacing or repairing the intake bypass valve, thereby saving usage costs and improving usage experience.

[0037] The control method of the gas bypass valve provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0038] In some embodiments, Figure 1 As shown, a valve control method includes:

[0039] Step 101: In response to monitoring that the intake bypass valve is stuck, controlling the intake bypass valve to perform self-cleaning to obtain a self-cleaning result.

[0040] In specific implementation, the reason for misjudgment of the intake bypass valve is that the intake bypass valve is stuck, so only when the intake bypass valve is detected to be stuck, directly determining that there is a fault will lead to a higher probability of misjudgment, and the process of whether the intake bypass valve is stuck is described as follows.

[0041] In some embodiments, determining whether the intake bypass valve is stuck includes:

[0042] Step 1011: In response to receiving an opening request for the intake bypass valve and an intercooler temperature of an intake intercooler in the intake pressure rear line being greater than a preset temperature threshold, determining a pressure fluctuation in the intake pressure rear line.

[0043] In specific implementation, the intake bypass valve is generally kept closed when the vehicle accelerates (or maintains a constant speed), and only needs to be opened when the vehicle decelerates. When there is a need to open the intake bypass valve, an opening request will be sent to the intake bypass valve to realize the opening control of the intake bypass valve.

[0044] In such Figure 2 The boost system shown includes an intake pipe and an outlet pipe. The outlet pipe includes an air-using device, an exhaust turbine blade, an exhaust bypass valve, and an outlet (connected to the exhaust pipe) connected in series, and adjacent devices are connected through an outlet pipe. The intake pipe includes an air filter, a supercharger, an intake intercooler, an intake bypass valve, a throttle, and an air-using device connected in series, and adjacent devices are connected through an intake pipe.

[0045] Among them, the intake pipeline is divided into the pre-intake pressure pipeline and the post-intake pressure pipeline. The pre-intake pressure pipeline is the part of the intake pipeline from the air filter to the supercharger; the post-intake pressure pipeline is the part of the intake pipeline from the supercharger to the gas-using equipment. The pre-intake pressure pipeline is used to filter the air (realized by the air filter in the pre-intake pressure pipeline) and provide the filtered air to the supercharger, and then the filtered air is pressurized by the supercharger and the supercharged air is input into the post-intake pressure pipeline. Therefore, the pre-intake pressure pipeline is all pressurized air, and there is no need to release the pressure. The post-intake pressure pipeline is used to cool the pressurized air (realized by the intake intercooler in the post-intake pressure pipeline) and input the cooled pressurized air into the gas-using equipment, and the throttle is used to control whether the cooled supercharged air is delivered to the gas-using equipment.

[0046] Take the engine as an example. When the throttle is open, it means that the engine has a demand for air and needs to input pressurized air into the engine. At this time, the throttle is opened and the intake bypass valve is closed to ensure that the pressurized air can smoothly enter the engine to ensure that the oil and gas in the engine can be fully burned. When the throttle is closed, it means that the engine has no demand for air and does not need to input pressurized air into the engine. At this time, the throttle is closed to prevent pressurized air from entering the engine. When the throttle valve of the intake pressure pipe is closed, the supercharger will be closed synchronously. However, due to inertia, the turbine blades of the supercharger cannot stop rotating instantly. The supercharger will continue to deliver pressurized air to the intake pressure pipe after the throttle valve is closed, causing the pipe pressure of the intake pressure pipe to continue to increase, resulting in a sudden increase in the pressure in the intake pressure pipe. The high-pressure air in the intake pressure pipe may flow back into the supercharger, causing surge and even damage to the supercharger. Therefore, an intake bypass valve is set between the supercharger and the throttle valve to discharge the high-pressure air in the intake pressure pipe.

[0047] If the intake bypass valve fails at this time and the opening process is stuck, the intake bypass valve cannot be fully opened or cannot be opened, which will cause the pressurized air to be unable to be discharged and may cause supercharger surge. Therefore, after receiving the opening request for the intake bypass valve, the intake bypass valve is opened to release the pressure, and the pressure relief is determined by monitoring the intercooler temperature of the intake intercooler in the intake pressure pipeline and the pipeline pressure of the intake pressure pipeline.

[0048] Among them, the intake intercooler is a supporting part of the supercharger. Its function is to reduce the temperature of the high-temperature air after supercharging, so as to reduce the heat load of the engine, increase the intake volume, and thus increase the power of the engine. For supercharged engines, the intake intercooler is an important component of the supercharging system. Whether it is a mechanical supercharged engine or a turbocharged engine, an intercooler needs to be installed between the supercharger and the intake manifold of the engine. If the pipeline pressure in the pipeline after the intake pressure is large, a large amount of heat will be generated during the air compression process, which will cause the intercooler temperature to rise. The greater the pressure, the greater the increase in the intercooler temperature. Therefore, by monitoring the intercooler temperature, it can be determined whether the pressure relief is completed.

[0049] If the intercooling temperature of the intake intercooler in the intake pressure pipe is less than or equal to the preset temperature threshold, it means that the pressure in the intake pressure pipe is small, which will not cause the pressurized air to flow back into the supercharger and will not cause surge, indicating that the intake bypass valve has qualified pressure relief capacity and is not stuck. If the intercooling temperature of the intake intercooler in the intake pressure pipe is greater than the preset temperature threshold, it means that the pressure in the intake pressure pipe is large, which may cause the pressurized air to flow back into the supercharger, and then cause surge, indicating that the intake bypass valve does not have qualified pressure relief capacity and may be stuck. It is necessary to further judge whether the intake bypass valve is really stuck based on the pressure fluctuation of the intake pressure pipe.

[0050] The intercooler temperature and pressure fluctuations are used to perform mutual verification to ensure the accuracy of the sticking judgment.

[0051] Step 1012: In response to the pressure fluctuation being greater than or equal to a preset fluctuation threshold, determining that there is a fluctuation exceeding the limit, and determining the consecutive number of fluctuation exceeding the limit within a cycle.

[0052] In a specific implementation, the pressure fluctuation represents the difference between the monitored pressure value and the standard pressure value (the pressure value when the supercharger is not performing supercharging). If the standard pressure value is 0, the monitored pressure value is the pressure fluctuation.

[0053] If the pressure fluctuation is greater than or equal to the preset fluctuation threshold, it means that the pipeline pressure value collected by the pressure sensor installed in the pipeline after the intake pressure is large, and it is determined that there is a fluctuation exceeding the limit, which may cause surge. However, in order to avoid randomness in the pressure collection process, it is necessary to determine the consecutive number of fluctuations exceeding the limit within a cycle.

[0054] For example, if a cycle period is 1 second and the frequency of collecting pipeline pressure is 50ms, the pipeline pressure will be collected 20 times in a cycle period, and 20 pressure fluctuations will be obtained. For any pressure fluctuation, a count is performed when the pressure fluctuation is greater than the fluctuation threshold. If the next collected pressure fluctuation is still greater than the fluctuation threshold, a cumulative count is performed, that is, the number of consecutive times = the number of consecutive times + 1. If the next collected pressure fluctuation is less than or equal to the fluctuation threshold, the number of consecutive times is reset to zero.

[0055] Step 1013: In response to the continuous number being greater than or equal to a preset number threshold, determining that the intake bypass valve is stuck.

[0056] During specific implementation, if the consecutive number of times is greater than or equal to the preset number threshold, it means that the consecutive pipeline pressure detections are all fluctuations exceeding the limit, which eliminates the randomness caused by single detection and intermittent detection, and eliminates the detection error of the pressure sensor. The pressure detection value is valid and reliable, and it can be determined that the intake bypass valve is stuck and needs subsequent self-cleaning treatment.

[0057] Step 1014: In response to the continuous number being less than a preset number threshold, determining that the intake bypass valve is not stuck.

[0058] In specific implementation, if the consecutive times are less than the preset times threshold, it means that there are no consecutive fluctuations exceeding the limit, and the fluctuation exceeding the limit may be accidental. The pressure detection value is unreliable. It can be determined that the intake bypass valve is not stuck, and the intake bypass valve can continue to be controlled according to demand. The intercooler temperature and pressure fluctuations are used to perform mutual verification to ensure the accuracy of the sticking judgment.

[0059] If the intake bypass valve is detected to be stuck, the fault code will not be reported directly and the corresponding fault light will be turned on. Instead, a self-cleaning function will be added. Self-cleaning is to control the intake bypass valve to open and close rapidly for multiple times within a certain period of time. For example, in one cycle, the intake bypass valve is controlled to open and close rapidly three times, so that the intake bypass valve performs three state switching processes in one cycle. One state switching process includes the change process of closed state-open state-closed state. Among them, the closed state of the intake bypass valve is as follows: Figure 3a As shown in Figure 2, the opening state of the intake bypass valve is as follows: Figure 3b As shown, it can be seen that the intake bypass valve includes a coil, a spring, a guide shaft, a valve core and a valve port. After receiving an opening request, the coil is energized, and the valve port is driven upward by the guide shaft to connect the air inlet and the air outlet to discharge the pressurized air. When receiving a closing request, the coil can be disconnected from the power supply, or a reverse current can be passed to the coil to make the valve port fall to separate the air inlet and the air outlet.

[0060] The self-cleaning process is to control the intake bypass valve to open and close multiple times to clean the oil and foreign matter attached to the intake bypass valve, and avoid misjudgment of faults caused by occasional foreign matter, oil and gas coking after pressure bending, etc. Then, it is necessary to determine the self-cleaning result through the pressure fluctuation of the intake bypass valve in the next cycle of self-cleaning. If there are still continuous fluctuations exceeding the limit, it means that the normal use of the intake bypass valve has been affected, and it is determined that the self-cleaning has failed. If there is no continuous fluctuation exceeding the limit, it means that the intake bypass valve can be used normally, and it is determined that the self-cleaning is successful.

[0061] By adding a self-cleaning function, the influence of oil stains and foreign matter on the normal use of the bypass valve in the near future can be avoided, ensuring the accuracy of fault code reporting.

[0062] Step 102: In response to the self-cleaning result being a cleaning failure, a fault code is reported, and the number of consecutive cycles of the intake bypass valve being stuck is determined.

[0063] During specific implementation, if the self-cleaning result is a cleaning failure, it means that the normal use of the intake bypass valve has been affected and there may be a structural failure. At this time, a fault code is reported, but the corresponding fault light will not be directly lit. In order to avoid contingency in the pressure collection process, it is necessary to determine the number of consecutive cycles of the intake bypass valve being stuck, that is, to determine the number of consecutive cycles in which the fluctuation exceeds the limit and is greater than or equal to the number threshold.

[0064] For example, if the first cycle determines that the intake bypass valve is stuck, and the self-cleaning result is a cleaning failure, a fault code is reported, and the number of consecutive cycles (initial value is 0) is updated to the number of consecutive cycles = 1. If the judgment result of the next cycle for the intake bypass valve is still that the intake bypass valve is stuck, the number of consecutive cycles = the number of consecutive cycles + 1 = 2. Similarly, if the judgment result of the next cycle is still that the intake bypass valve is stuck, the number of consecutive cycles = the number of consecutive cycles + 1 = 3. If the judgment result of a certain cycle is that the intake bypass valve is not stuck, the number of consecutive cycles is cleared, that is, the number of consecutive cycles = 0. By determining the number of consecutive cycles of the intake bypass valve stuck, the randomness of fault judgment is avoided, the accuracy of fault judgment is improved, and the user is prevented from frequently replacing or repairing the intake bypass valve, saving the cost of use.

[0065] Step 103: In response to the number of consecutive cycles being greater than or equal to a preset safety number, it is determined that there is a fault in the intake bypass valve, and an alarm is issued.

[0066] In specific implementation, if the number of consecutive cycles is greater than or equal to the preset safety number of times, the randomness of abnormalities in the monitoring data of a single cycle can be ruled out. Only when the number of consecutive cycles is greater than or equal to the preset safety number of times can it be determined that there is a fault in the intake bypass valve and an alarm is given. Continuous fault judgment is used to avoid the randomness of a single judgment, avoid the influence of misjudgment caused by loose connection of the wiring harness, avoid alarm prompts when the intake bypass valve is intact, and avoid users from frequently replacing or repairing the intake bypass valve, thereby saving usage costs and improving the user experience.

[0067] In summary, the control method of the valve provided by the present application will not immediately give an alarm after detecting that the intake bypass valve is stuck, but will control the intake bypass valve to perform self-cleaning, and clean the oil and foreign matter attached to the intake bypass valve through self-cleaning to avoid misjudgment of faults caused by occasional foreign matter, post-compression oil and gas coking, etc. If the self-cleaning fails, it means that the intake bypass valve is not stuck due to foreign matter, and the fault code is reported, but the alarm prompt will not be directly based on the fault code. Instead, the number of consecutive cycles of the intake bypass valve stuck is determined to avoid the contingency of fault judgment and improve the accuracy of fault judgment. Only when the number of consecutive cycles is greater than or equal to the preset safety number of times can it be determined that the intake bypass valve has a fault and an alarm prompt is given. The contingency of a single judgment is avoided through continuous fault judgment, and the influence of misjudgment caused by virtual connection of the wiring harness is avoided. The alarm prompt is avoided when the intake bypass valve is intact, and the user is prevented from frequently replacing or repairing the intake bypass valve, saving the cost of use and improving the user experience.

[0068] In some embodiments, Figure 4 As shown, the valve control method also includes:

[0069] Step 401: In response to the self-cleaning result being successful, determine the real-time pressure value of the intake air pressure rear pipeline.

[0070] During specific implementation, if the self-cleaning result is a successful self-cleaning, it means that the reason for the stuck intake bypass valve is oil and foreign matter. The corresponding oil or foreign matter can be cleaned through self-cleaning control to ensure that the intake bypass valve can be smoothly opened and closed in the next cycle of self-cleaning, and then the intake bypass valve can be smoothly opened when the throttle in the intake pressure pipe is closed, so as to ensure that the pressurized air in the intake pressure pipe can be discharged into the intake pipe connected to the air filter and the supercharger through the outlet pipe connected to the pressure relief valve, so as to discharge the pressurized air in the intake pressure pipe in a way of bypassing the supercharger, thereby completing the pressure relief of the intake pressure pipe, avoiding the pressurized air from flowing back into the supercharger, avoiding the occurrence of surge phenomenon, and improving the user experience.

[0071] After confirming that self-cleaning is successful, the intake bypass valve can relieve the pressure in the pipeline behind the intake pressure. At this time, it is necessary to close the intake bypass valve after the pressure relief is completed. Whether the pressure relief is completed needs to be judged based on the real-time pressure value of the pipeline behind the intake pressure. Therefore, after the self-cleaning is successful, the pressure value in the pipeline behind the intake pressure can be monitored in real time through the pressure sensor, and the timing of closing the intake bypass valve can be determined by comparing the real-time pressure value with the preset pressure threshold, to ensure that the pressure relief can be completed and the intake bypass valve can be closed in time.

[0072] Step 402: In response to the real-time pressure value being less than or equal to a preset pressure threshold, closing the intake bypass valve.

[0073] In specific implementation, if the real-time pressure value is less than or equal to the preset pressure threshold, it means that the pressurized air in the intake pressure pipeline has been discharged and the pressure relief has been completed. After closing the intake bypass valve, the air will not flow back into the supercharger due to the excessive pressure in the intake pressure pipeline, and there will be no surge phenomenon. The intake bypass valve can be closed to ensure the efficiency of the next supercharged intake. The timing of closing the intake bypass valve is determined by comparing the real-time pressure value with the preset pressure threshold, ensuring that the pressure relief can be completed and the intake bypass valve can be closed in time.

[0074] In some embodiments, Figure 5 As shown, the valve control method also includes:

[0075] Step 501: In response to the number of consecutive cycles being less than a preset safety number, it is determined that there is no fault in the intake bypass valve, the reported fault code is stored, and the real-time pressure value of the intake pressure rear pipeline is determined.

[0076] In specific implementation, if the number of consecutive cycles is less than the preset safety number, it means that the judgment result of a single cycle is caused by chance. After the first cycle in which the stuck is determined, there is a judgment result that the intake bypass valve is not stuck, which means that the intake bypass valve can be opened normally in the corresponding cycle and the pressure relief of the intake pressure pipeline is completed. It is determined that there is no structural fault in the intake bypass valve, and the reported fault code is stored for reference data when the subsequent intake bypass valve fails, which is convenient for maintenance personnel to understand the cause of the fault and provides convenience for the maintenance of the intake bypass valve. Since the intake bypass valve has been opened and the pressure relief of the intake pressure pipeline has begun, it is necessary to close the intake bypass valve after the pressure relief is completed. Whether the pressure relief is completed needs to be judged according to the real-time pressure value of the intake pressure pipeline. Therefore, after determining that the number of consecutive cycles is less than the preset safety number, the pressure value in the intake pressure pipeline can be monitored in real time by the pressure sensor, and the timing of closing the intake bypass valve can be determined by comparing the real-time pressure value with the preset pressure threshold, so as to ensure that the pressure relief can be completed and the intake bypass valve can be closed in time.

[0077] Step 502: In response to the real-time pressure value being less than or equal to a preset pressure threshold, closing the intake bypass valve.

[0078] In specific implementation, if the real-time pressure value is less than or equal to the preset pressure threshold, it means that the pressurized air in the intake pressure pipeline has been discharged and the pressure relief has been completed. After closing the intake bypass valve, the air will not flow back into the supercharger due to the excessive pressure in the intake pressure pipeline, and there will be no surge phenomenon. The intake bypass valve can be closed to ensure the efficiency of the next supercharged intake. The timing of closing the intake bypass valve is determined by comparing the real-time pressure value with the preset pressure threshold, ensuring that the pressure relief can be completed and the intake bypass valve can be closed in time.

[0079] In some embodiments, Figure 6 As shown, the intake bypass valve is controlled to perform self-cleaning, and the self-cleaning results are obtained, including:

[0080] Step 601: In one cycle, the intake bypass valve is controlled to be opened and closed continuously according to a preset cleaning number.

[0081] In specific implementation, the self-cleaning process is to control the intake bypass valve to open and close multiple times to clean the oil and foreign matter attached to the intake bypass valve, and avoid misjudgment of faults caused by occasional foreign matter, post-compression oil and gas coking, etc. In order to avoid the self-cleaning process taking up too much time, the corresponding self-cleaning process can be completed within a cycle, and the preset cleaning times can be 3 times or 4 times. By controlling the intake bypass valve to open and close continuously according to the preset cleaning times, the oil and foreign matter in the intake bypass valve can be cleaned to avoid misjudgment caused by foreign matter or oil.

[0082] Step 602: In the next cycle, determine the new pressure fluctuation of the pipeline after the intake pressure, and determine the self-cleaning result according to the new pressure fluctuation.

[0083] In specific implementation, the result of self-cleaning needs to be judged within the next cycle of self-cleaning. Therefore, the self-cleaning result needs to be determined by the new pressure fluctuation of the intake bypass valve within the next cycle of self-cleaning. The determination process is shown in the following embodiment.

[0084] In some embodiments, determining a self-cleaning result based on the new pressure fluctuation includes:

[0085] Step 6021: In response to the new pressure fluctuation being less than a preset fluctuation threshold, determining that the self-cleaning result is successful.

[0086] During specific implementation, if the new pressure fluctuation is smaller than the preset fluctuation threshold, it means that the pressurized air in the intake pressure pipeline has been discharged, and the intake bypass valve can relieve the pressure in the intake pressure pipeline. It is determined that the self-cleaning result is successful, and the intake bypass valve can work normally.

[0087] Step 6022: In response to the new pressure fluctuation being greater than or equal to a preset fluctuation threshold, and the number of consecutive times the fluctuation exceeds the limit being greater than or equal to a preset number threshold, determining that the self-cleaning result is a self-cleaning failure.

[0088] During specific implementation, if the new pressure fluctuation is greater than or equal to the preset fluctuation threshold, it means that the pressure relief of the intake pressure pipeline has failed. However, it may be that the data collection frequency is too high, resulting in the pressurized gas not being discharged from the intake pressure pipeline. Therefore, it is also necessary to determine the consecutive number of fluctuations exceeding the limit to leave time for the gas to be discharged and eliminate the randomness of pressure detection. If the consecutive number is greater than or equal to the preset number threshold, it means that the fluctuation exceeding the limit is not accidental, nor is it caused by slow pressure relief. It is because the intake bypass valve has a fault that cannot relieve pressure. The self-cleaning result is determined to be self-cleaning failure, and the intake bypass valve cannot complete the pressure relief of the intake pressure pipeline.

[0089] Step 6023: In response to the new pressure fluctuation being greater than or equal to the preset fluctuation threshold, and the consecutive number of fluctuation exceeding the limit being less than the preset number threshold, determining that the self-cleaning result is successful.

[0090] During specific implementation, if the new pressure fluctuation is greater than or equal to the preset fluctuation threshold, it means that the pressure relief of the intake pressure pipeline has failed. However, it may be that the data acquisition frequency is too high, resulting in the pressurized gas not being discharged from the intake pressure pipeline. Therefore, it is also necessary to determine the consecutive number of fluctuations exceeding the limit to leave time for the gas discharge and eliminate the randomness of pressure detection. If the consecutive number of fluctuations exceeding the limit is less than the preset number threshold, it means that there is randomness in the judgment process, or the pressure relief process requires a certain amount of time to complete, and the intake bypass valve can complete the pressure relief of the intake pressure pipeline, and the self-cleaning result is determined to be successful, and the intake bypass valve can be used normally after self-cleaning.

[0091] When the air intake bypass valve is detected to be stuck, the system will not give an alarm immediately. Instead, the air intake bypass valve will be controlled to perform self-cleaning. The oil stains and foreign objects attached to the air intake bypass valve will be cleaned through self-cleaning to avoid misjudgment of faults caused by occasional foreign objects, post-compression oil and gas coking, etc.

[0092] In some embodiments, Figure 7 As shown, determine the number of consecutive cycles of the intake bypass valve sticking, including:

[0093] Step 701: Determine whether the intake bypass valve is stuck in the next cycle.

[0094] In specific implementation, for the process of determining the number of consecutive cycles, in order to ensure continuity, if the judgment result of any cycle period is stuck, it is updated by the number of consecutive cycles = the number of consecutive cycles + 1, and then it is determined whether the intake bypass valve is stuck in the next cycle period, and the value of the number of consecutive cycles is determined according to the judgment result.

[0095] Step 702: In response to the intake bypass valve being stuck, a cumulative calculation is performed on the number of consecutive cycles.

[0096] In specific implementation, if the judgment result in the next cycle is that the intake bypass valve is stuck, it means that the intake bypass valve is continuously judged to be stuck, and the number of consecutive cycles needs to be accumulated once to update the value of the number of consecutive cycles. The cumulative calculation process is: number of consecutive cycles = number of consecutive cycles + 1.

[0097] Step 703: In response to the intake bypass valve not being stuck, clearing the number of consecutive cycles.

[0098] In specific implementation, if the intake bypass valve is not stuck, it means that the intake bypass valve can be opened smoothly in the new cycle and the pressure relief of the intake pressure pipeline is completed. There is no need to continue the fault judgment. The number of consecutive cycles is cleared to provide an initial value for the next continuous judgment.

[0099] After self-cleaning fails, a fault code is reported, but an alarm is not given directly based on the fault code. Instead, the number of consecutive cycles of the intake bypass valve being stuck is determined to avoid random fault judgment and improve the accuracy of fault judgment. Only when the number of consecutive cycles is greater than or equal to the preset safety number of times can it be determined that there is a fault in the intake bypass valve and an alarm is given. Continuous fault judgment is used to avoid the randomness of a single judgment, avoid the influence of misjudgment caused by loose connection of the wiring harness, avoid alarm prompts when the intake bypass valve is intact, and avoid users from frequently replacing or repairing the intake bypass valve, thereby saving usage costs and improving usage experience.

[0100] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0101] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0102] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a valve control device.

[0103] refer to Figure 8 , the control device of the valve comprises:

[0104] The self-cleaning control module 10 is configured to: in response to monitoring that the intake bypass valve is stuck, control the intake bypass valve to perform self-cleaning to obtain a self-cleaning result;

[0105] The cycle number determination module 20 is configured to: in response to the self-cleaning result being a cleaning failure, report a fault code and determine the number of consecutive cycles of the intake bypass valve being stuck;

[0106] The alarm prompt module 30 is configured to: in response to the number of consecutive cycles being greater than or equal to a preset safety number, determine that there is a fault in the intake bypass valve and issue an alarm prompt.

[0107] For the convenience of description, the above device is described in terms of functions divided into various modules. Of course, when implementing the present application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0108] The device of the above embodiment is used to implement the corresponding valve control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0109] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an engine, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the valve control method described in any of the above embodiments is implemented.

[0110] Fig. 9A more specific schematic diagram of the engine hardware structure provided by this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040 and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030 and the communication interface 1040 are connected to each other through the bus 1050 in the device.

[0111] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0112] The memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0113] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0114] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0115] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0116] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0117] The engine of the above embodiment is used to implement the corresponding valve control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0118] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the valve control method described in any of the above embodiments.

[0119] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, 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 technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0120] The computer instructions stored in the storage medium of the above embodiments are used to enable the computer to execute the valve control method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0121] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides a vehicle, including an engine or valve control device of the above-mentioned embodiment, and the valve control method described in any of the above-mentioned embodiments is executed through the engine or valve control device of the above-mentioned embodiment, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0122] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0123] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0124] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0125] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0126] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0127] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0128] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0129] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A valve control method, characterized in that: include: In response to monitoring that the intake bypass valve is stuck, controlling the intake bypass valve to perform self-cleaning to obtain a self-cleaning result; In response to the self-cleaning result being a cleaning failure, reporting a fault code, and determining the number of consecutive cycles of the intake bypass valve being stuck; In response to the number of consecutive cycles being greater than or equal to a preset safety number of times, it is determined that a fault exists in the intake bypass valve, and an alarm is issued.

2. The valve control method according to claim 1, characterized in that: Determining whether the intake bypass valve is stuck includes: In response to receiving an opening request for the intake bypass valve and an intercooler temperature of an intake intercooler in the intake air pressure rear line being greater than a preset temperature threshold, determining a pressure fluctuation in the intake air pressure rear line; In response to the pressure fluctuation being greater than or equal to a preset fluctuation threshold, determining that there is a fluctuation exceeding the limit, and determining the consecutive number of the fluctuation exceeding the limit in a cycle; In response to the continuous number being greater than or equal to a preset number threshold, determining that the intake bypass valve is stuck; In response to the continuous number being less than a preset number threshold, it is determined that the intake bypass valve is not stuck.

3. The valve control method according to claim 1, characterized in that: The controlling the intake bypass valve to perform self-cleaning to obtain a self-cleaning result includes: In one cycle, the intake bypass valve is controlled to be opened and closed continuously according to a preset number of cleaning times; In the next cycle, a new pressure fluctuation of the intake pressure rear pipeline is determined, and the self-cleaning result is determined according to the new pressure fluctuation.

4. The valve control method according to claim 3, characterized in that: The determining the self-cleaning result according to the new pressure fluctuation comprises: In response to the new pressure fluctuation being less than a preset fluctuation threshold, determining that the self-cleaning result is a self-cleaning success; In response to the new pressure fluctuation being greater than or equal to a preset fluctuation threshold, and the number of consecutive times the fluctuation exceeds the limit being greater than or equal to a preset number threshold, determining that the self-cleaning result is a self-cleaning failure; In response to the new pressure fluctuation being greater than or equal to a preset fluctuation threshold, and the number of consecutive times that the fluctuation exceeds the limit being less than a preset number threshold, the self-cleaning result is determined to be a successful self-cleaning.

5. The valve control method according to claim 1, characterized in that: Determining the number of consecutive cycles of the intake bypass valve being stuck includes: determining whether the intake bypass valve is stuck during the next cycle; In response to the intake bypass valve being stuck, accumulating the number of consecutive cycles; In response to the intake bypass valve not being stuck, the number of consecutive cycles is cleared to zero.

6. The valve control method according to claim 1, characterized in that: Also includes: In response to the self-cleaning result being a successful cleaning, determining a real-time pressure value of the air intake pressure rear pipeline; In response to the real-time pressure value being less than or equal to a preset pressure threshold, the intake bypass valve is closed.

7. The valve control method according to claim 1, characterized in that: Also includes: In response to the number of consecutive cycles being less than a preset safety number, determining that the intake bypass valve is not faulty, storing the reported fault code, and determining a real-time pressure value of the intake pressure rear pipeline; In response to the real-time pressure value being less than or equal to a preset pressure threshold, the intake bypass valve is closed.

8. A valve control device, characterized in that: include: The self-cleaning control module is configured to: in response to monitoring that the intake bypass valve is stuck, control the intake bypass valve to perform self-cleaning to obtain a self-cleaning result; a cycle number determination module, configured to: in response to the self-cleaning result being a cleaning failure, report a fault code, and determine the number of consecutive cycles of the intake bypass valve being stuck; The alarm prompt module is configured to: in response to the number of consecutive cycles being greater than or equal to a preset safety number, determine that there is a fault in the intake bypass valve and issue an alarm prompt.

9. An engine, characterized in that: The engine is used to execute the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: A control device comprising a valve as claimed in claim 8 or an engine as claimed in claim 9.

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