Electric supercharger control method and device, electronic equipment, medium and vehicle

Abstract

The invention relates to an electric supercharger control method and device, electronic equipment, a medium and a vehicle. The method comprises the steps that a control flag bit of a waste gas bypass valve, a control flag bit of a throttle valve, a diagnosis flag bit of a boost pressure signal sensor, a position signal flag bit of the throttle valve and a boost pressure flag bit are obtained; and when the control flag bit of the waste gas bypass valve, the control flag bit of the throttle valve, the diagnosis flag bit of the boost pressure signal sensor, the position signal flag bit of the throttle valve and the boost pressure flag bit are all true, the waste gas bypass valve is controlled to work normally. By means of the method, normal work of the waste gas bypass valve can be guaranteed, then the pressurization function is achieved, and the stability of the range extender in work can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of automotive engine technology, and more particularly to an electric supercharger control method, apparatus, electronic equipment, medium, and vehicle. Background Technology

[0002] Currently, turbochargers are one of the most common components of engines. Their main function is to compress the air entering the engine cylinders and adjust the boost pressure to meet the engine's performance requirements. Range extenders are devices that enable the conversion between an engine and a generator, and are commonly used in hybrid electric vehicles and range-extended electric vehicles.

[0003] In related technologies, the control enable condition for electric superchargers only considers the desired boost pressure. When the desired boost pressure is greater than the actual boost pressure, boost control is enabled, thereby adjusting the exhaust bypass valve. However, both the exhaust bypass valve and the throttle valve increase the intake air volume, and their positions are adjusted by motor control. When the range extender is under medium load, this solution may result in the throttle valve not being fully open, and the exhaust bypass valve being in an engaged state (i.e., not in the default position). In this state, both motors operate simultaneously, causing energy waste. If the desired boost pressure changes drastically at this time, it will cause unstable intake air volume control, leading to range extender vibration. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides an electric supercharger control method, apparatus, electronic device, medium, and vehicle.

[0005] In a first aspect, this disclosure provides an electric turbocharger control method, including:

[0006] The system acquires the control flags of the wastegate bypass valve, throttle valve, boost pressure sensor, throttle valve position signal, and boost pressure. The wastegate bypass valve control flag indicates whether the position control of the wastegate bypass valve has been successfully learned. The throttle valve control flag indicates whether the position control of the throttle valve has been successfully learned. The boost pressure sensor diagnostic flag indicates whether the boost pressure sensor is functioning correctly. The throttle valve position signal flag indicates whether the actual throttle valve position feedback signal value is greater than the preset throttle valve position feedback signal value. The boost pressure flag indicates whether the desired boost pressure is greater than the base boost pressure.

[0007] When the control flag of the exhaust bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag are all true, the exhaust bypass valve is controlled to work normally.

[0008] As an optional implementation of this disclosure, the acquisition of the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag includes:

[0009] If the boost pressure sensor is diagnosed normally, then the diagnostic flag of the boost pressure signal sensor is determined to be true.

[0010] As an optional implementation of this disclosure, the step of acquiring the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag further includes:

[0011] If the actual throttle position feedback signal value is greater than the preset throttle position feedback signal value, then the throttle position signal flag is determined to be true.

[0012] As an optional implementation of this disclosure, the step of acquiring the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag further includes:

[0013] Obtain the desired boost pressure and the target base boost pressure;

[0014] If the sum of the desired boost pressure and the first hysteresis offset is greater than the target base boost pressure, then the boost pressure flag is determined to be true.

[0015] If the difference between the desired boost pressure and the second hysteresis offset is less than the target base boost pressure, then the boost pressure flag is determined to be false.

[0016] As an optional implementation of this disclosure, obtaining the desired boost pressure and the target base boost pressure includes:

[0017] Obtain the current speed and desired torque of the range extender;

[0018] Calculate the desired boost pressure based on the desired torque;

[0019] Based on the first preset calibration table, the first base boost pressure corresponding to the current speed is obtained; the first preset calibration table is used to represent the correspondence between the speed of the range extender and the base boost pressure.

[0020] Based on the second preset calibration table, the pressure correction coefficient corresponding to the current environmental pressure is obtained; the second preset calibration table is used to represent the correspondence between atmospheric pressure and pressure correction coefficient at different altitudes;

[0021] The target base boost pressure corresponding to the current rotational speed is obtained by multiplying the first base boost pressure and the pressure correction coefficient.

[0022] As an optional implementation of this disclosure, obtaining the pressure correction coefficient corresponding to the current environmental pressure based on the second preset calibration table includes:

[0023] With the throttle fully open, obtain the first basic boost pressure of the range extender at different speeds;

[0024] Under different environmental pressures, the second basic boost pressure of the range extender at different speeds is obtained;

[0025] Based on the ratio of the second base boost pressure to the first base boost pressure, obtain the pressure correction coefficient corresponding to different environmental pressures.

[0026] In a second aspect, embodiments of this disclosure provide a control device for an electric supercharger, comprising:

[0027] The acquisition module is used to acquire the control flags of the waste gas bypass valve, the control flags of the throttle valve, the diagnostic flags of the boost pressure signal sensor, the position signal flags of the throttle valve, and the boost pressure flags.

[0028] The control module is used to control the waste gas bypass valve to work normally when the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag are all true.

[0029] As an optional implementation of this disclosure, the acquisition module is specifically used for:

[0030] If the boost pressure sensor diagnosis is normal, then the diagnostic flag bit of the boost pressure signal sensor is determined to be true. As an optional implementation of this disclosure, the acquisition module is further specifically used for:

[0031] If the actual throttle position feedback signal value is greater than the preset throttle position feedback signal value, then the throttle position signal flag is determined to be true.

[0032] As an optional implementation of this disclosure, the acquisition module is further specifically used for:

[0033] Obtain the desired boost pressure and the target base boost pressure;

[0034] If the sum of the desired boost pressure and the first hysteresis offset is greater than the target base boost pressure, then the boost pressure flag is determined to be true.

[0035] If the difference between the desired boost pressure and the second hysteresis offset is less than the target base boost pressure, then the boost pressure flag is determined to be false.

[0036] As an optional implementation of this disclosure, obtaining the desired boost pressure and the target base boost pressure includes:

[0037] Obtain the current speed and desired torque of the range extender;

[0038] Calculate the desired boost pressure based on the desired torque;

[0039] Based on the first preset calibration table, the first base boost pressure corresponding to the current speed is obtained; the first preset calibration table is used to represent the correspondence between the speed of the range extender and the base boost pressure.

[0040] Based on the second preset calibration table, the pressure correction coefficient corresponding to the current environmental pressure is obtained; the second preset calibration table is used to represent the correspondence between atmospheric pressure and pressure correction coefficient at different altitudes;

[0041] The target base boost pressure corresponding to the current rotational speed is obtained by multiplying the first base boost pressure and the pressure correction coefficient.

[0042] As an optional implementation of this disclosure, obtaining the pressure correction coefficient corresponding to the current environmental pressure based on the second preset calibration table includes:

[0043] With the throttle fully open, obtain the first basic boost pressure of the range extender at different speeds;

[0044] Under different environmental pressures, the second basic boost pressure of the range extender at different speeds is obtained;

[0045] Based on the ratio of the second base boost pressure to the first base boost pressure, obtain the pressure correction coefficient corresponding to different environmental pressures.

[0046] Thirdly, embodiments of this disclosure provide an electronic device, including: one or more processors;

[0047] Storage device for storing one or more programs.

[0048] When the one or more programs are executed by the one or more processors, the one or more processors implement the electric supercharger control method as described in any embodiment of the first aspect.

[0049] Fourthly, embodiments of this disclosure provide a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the electric supercharger control method as described in any embodiment of the first aspect.

[0050] Fifthly, the disclosed embodiments provide a vehicle including: electronic equipment as described in the third aspect.

[0051] The technical solution provided in this disclosure has the following advantages compared with the prior art: It acquires the control flags of the waste gas bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag; when all of these flags are true, the waste gas bypass valve is controlled to operate normally. Specifically, the control flag of the waste gas bypass valve indicates whether the position control of the waste gas bypass valve has been successfully learned. The control flag of the throttle valve indicates whether the position control of the throttle valve has been successfully learned. The diagnostic flag of the boost pressure signal sensor indicates whether the boost pressure sensor is diagnosed as normal. The throttle valve position signal flag indicates whether the actual throttle valve position feedback signal value is greater than the preset throttle valve position feedback signal value. The boost pressure flag indicates whether the desired boost pressure is greater than the base boost pressure. By acquiring the control flags of the exhaust bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag, the exhaust bypass valve can only function normally when all five flags are true, thereby achieving the boost function. This can improve the stability of the range extender during operation, thereby improving the overall NVH quality of the vehicle and reducing energy waste. Attached Figure Description

[0052] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0053] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a system configuration diagram of the intake and exhaust pipes and related electrical components;

[0055] Figure 2a This is a schematic flowchart of an electric supercharger control method provided in an embodiment of this disclosure;

[0056] Figure 2b This is a schematic diagram of the control logic of an electric supercharger control method provided in an embodiment of this disclosure;

[0057] Figure 3 This is a schematic diagram of the structure of a control device for an electric supercharger provided in an embodiment of this disclosure;

[0058] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0059] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0060] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0061] The terms "first" and "second" and other relational terms used in this disclosure and claims are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0062] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner. Furthermore, in the description of the embodiments in this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0063] The Electronic Waste Gate (EWG) is a crucial component of an automotive engine's exhaust system. Its primary function is to regulate and control the flow of exhaust gases to optimize engine performance and emissions. When the boost pressure in the compressor exceeds a predetermined value, the air pressure pushes a diaphragm to compress a spring, causing a lever to extend outward and open the EWG. This allows some exhaust gases to bypass the turbine and instead enter the exhaust manifold directly from the bypass valve located before the turbine. This reduces the amount and pressure of exhaust gases driving the turbine, thereby lowering the turbine speed, reducing boost pressure, and preventing engine runaway caused by overboost.

[0064] Electronic Throttle Control (ETC) is an important control component of a car engine, controlling the vehicle's intake air volume and speed. It consists of the engine, speed sensor, throttle valve, etc. Using an electronic throttle control system, the throttle opening can be precisely controlled.

[0065] NVH is an abbreviation for Noise, Vibration, and Harshness, and is a general term for various indicators related to vehicle noise, vibration, and comfort. Since structural vibrations in a vehicle generate noise, which in turn affects comfort, and when comfort is compromised, corresponding vibration and noise issues inevitably arise. Therefore, these three factors occur simultaneously and are inextricably linked in vehicle vibration and noise.

[0066] Reference Figure 1 As shown, Figure 1 This is a schematic diagram of a range extender. The range extender includes: an air filter, intake manifold, boost pressure sensor, electronic throttle, range extender body, exhaust manifold, turbocharger impeller, turbocharger turbine, and a shaft connecting the turbocharger impeller and turbine, as well as a wastegate valve. The turbocharger itself consists of the turbocharger impeller, turbocharger turbine, shaft connecting the impeller and turbine, and wastegate valve. Air enters the intake manifold through the air filter. When air enters the range extender body, it mixes with gasoline and combusts to generate power. The air filter removes impurities from the air, protecting the engine cylinders. When the wastegate valve is closed, exhaust gas passes through the turbine, increasing its speed, which in turn increases the impeller speed, resulting in an increase in the pressure detected by the boost pressure sensor. When the exhaust bypass valve is opened, some exhaust gas is discharged through the exhaust bypass valve. At this time, this part of the exhaust gas does not pass through the turbocharger turbine, so the turbocharger turbine speed decreases, which in turn drives the impeller speed to decrease, resulting in a decrease in the pressure collected by the boost pressure sensor.

[0067] In some embodiments, such as Figure 2a As shown, an electric supercharger control method is provided, including the following steps S21-S22:

[0068] S21. Obtain the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag.

[0069] The control flags for the wastegate and throttle valves indicate whether the valve position control has been successfully learned. The control flag for the throttle valve indicates whether the position control has been successfully learned. The diagnostic flag for the boost pressure sensor indicates whether the boost pressure sensor is functioning correctly. The throttle position signal flag indicates whether the actual throttle position feedback signal value is greater than the preset throttle position feedback signal value. The boost pressure flag indicates whether the desired boost pressure is greater than the base boost pressure.

[0070] S22. When the control flag of the exhaust bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag are all true, the exhaust bypass valve is controlled to work normally.

[0071] In some embodiments, before executing step S22 (controlling the waste gas bypass valve to work normally when the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag are all true), the following steps are also performed:

[0072] A. Determine whether the control flag of the waste gas bypass valve is true.

[0073] Specifically, when the range extender controller is powered on, the wastegate valve performs a self-learning process, adjusting it to its maximum position—either the non-pressurized position or the default position—to ensure proper operation. Setting the wastegate valve to its maximum position reduces exhaust pipe resistance, facilitating better range extender startup. If the wastegate valve learning is successful, the EWGLernSuccess flag is true; otherwise, it is false.

[0074] Self-learning can be understood as the actuator finding its zero point and maximum opening to prevent control errors after zero point drift.

[0075] B. Determine whether the control flag of the throttle valve is true.

[0076] Specifically, when the range extender controller is powered on, the throttle body also performs self-learning. It then controls the throttle body to a relatively small position. If the position is too large, the intake air volume will be too high when the range extender starts, leading to excessive engine speed or load, which can damage the range extender. If the throttle body can accurately complete the self-learning process, it indicates that the throttle body can be controlled normally, and the ETCLernSuccess flag will be true; otherwise, it will be false.

[0077] C. Determine whether the diagnostic flag bit of the boost pressure signal sensor is true.

[0078] Optionally, if the boost pressure sensor diagnosis is normal, then the diagnostic flag bit of the boost pressure signal sensor is determined to be true.

[0079] Specifically, since the boost pressure closed-loop control requires a boost pressure sensor, the boost pressure sensor signal must be normal for the boost control function to be enabled. When the boost pressure sensor diagnostics are normal, the TurboSensorSt flag is true; otherwise, it is false.

[0080] D. Determine whether the throttle position signal flag is true.

[0081] Optionally, if the actual throttle position feedback signal value is greater than the preset throttle position feedback signal value, then the throttle position signal flag is determined to be true.

[0082] The preset position feedback signal value can be set according to the actual situation. For example, the preset position feedback signal value can be set to 98, that is, when the actual position of the throttle valve is greater than 98%, it can be understood as fully open, and there is no throttling effect at this time.

[0083] Specifically, both the wastegate and throttle function to increase intake air volume, and both are controlled by motors to adjust their positions. When the range extender is under medium load, the original design sometimes results in the wastegate being in an engaged state (not in its default position) when the throttle is not fully open. In this state, both motors operate simultaneously, inevitably leading to energy waste. If a rapid change in boost pressure is desired at this time, it may cause unstable intake air volume control, resulting in range extender vibration. Therefore, to achieve decoupled control of the throttle and wastegate, the actual throttle position feedback signal value must be greater than a preset signal threshold. When the actual throttle position feedback signal value is greater than the preset signal threshold, it is interpreted as the throttle being fully open, and there is no throttling effect; the flag ETCWOTFlg is true at this time, otherwise it is false.

[0084] E. Determine whether the boost pressure flag is true.

[0085] Optionally, step E above (determining whether the boost pressure flag is true) can be implemented in the following way:

[0086] E1. Obtain the desired boost pressure and the target base boost pressure.

[0087] Furthermore, step E1 above (obtaining the desired boost pressure and the target base boost pressure) can be achieved in the following way:

[0088] (1) Obtain the current speed and desired torque of the range extender.

[0089] Specifically, the current speed of the range extender is obtained by measuring it using a speed sensor. The desired torque is obtained by the range extender control system.

[0090] (2) Calculate the desired boost pressure based on the desired torque.

[0091] (3) Based on the first preset calibration table, obtain the first basic boost pressure corresponding to the current speed.

[0092] The first preset calibration table is used to represent the correspondence between the speed of the range extender and the basic boost pressure.

[0093] Specifically, when the exhaust bypass valve is in its default position (i.e., fully open), not all the exhaust gas generated during the operation of the range extender passes through the exhaust bypass valve. Some of the exhaust gas also passes through the turbocharger turbine, thereby driving the turbocharger impeller to rotate. The boost pressure generated at this time is called the base boost pressure. The base boost pressure is related to the range extender speed, and the corresponding relationship can be found in Table 1.

[0094] For example, in Table 1, the input is the range extender speed, with a speed range of 1000-4000 RPM and an interval of 500 RPM. The calibration process for Table 1 is as follows: fix the range extender at the corresponding speed, and put the throttle in the fully open position. Record the value measured by the boost pressure sensor as Pressure1, and fill this value into the corresponding table.

[0095] Table 1

[0096] rotational speed 1000 1500 2000 2500 3000 3500 4000 Basic boost pressure 110 115 120 125 135 137 140

[0097] (4) Based on the second preset calibration table, obtain the pressure correction coefficient corresponding to the current environmental pressure.

[0098] The second preset calibration table is used to represent the correspondence between atmospheric pressure and pressure correction coefficient at different altitudes.

[0099] Optionally, the pressure correction factor corresponding to the current ambient pressure can be obtained in the following way:

[0100] With the throttle fully open, the first basic boost pressure of the range extender at different speeds is obtained.

[0101] Under different environmental pressures, the second basic boost pressure corresponding to the range extender at different speeds is obtained.

[0102] Based on the ratio of the second base boost pressure to the first base boost pressure, obtain the pressure correction coefficient corresponding to different environmental pressures.

[0103] Specifically, when calibrating Table 1 (basic boost pressure), considering the influence of altitude, the standard reference environmental pressure C_RefEnvPress at the time of calibration of this table needs to be recorded. This standard reference environmental pressure is generally 101.3 kPa.

[0104] Since the ambient pressure C_RefEnvPress varies at different altitudes, it will affect the base boost pressure. Therefore, a correction factor table for different altitudes needs to be added.

[0105] For example, Table 2 shows the correction factor table for different altitudes. The input is ambient pressure, ranging from 60 to 110 kPa with intervals of 10. When calibrating this table, record the ambient pressure at that time. Similarly, fix the range extender at the corresponding speed and keep the throttle fully open. Record the pressure measured by the boost pressure sensor as Pressure2. Then calculate the correction factor k = Pressure2 / Pressure1 and fill k into the corresponding ambient pressure in the table. For example, the ambient pressures in this correction factor table are 60 kPa, 70 kPa, 80 kPa, 90 kPa, 100 kPa, and 110 kPa. When calibrating the correction factor corresponding to an ambient pressure of 60 kPa, fix the range extender speed at the speed corresponding to Table 1 and adjust the throttle to the fully open position. Assuming that the base boost pressure corresponding to the range extender speed of 2000 rpm in Table 1 is Pressure3, and the base boost pressure corresponding to the range extender speed of 2000 rpm when the ambient pressure is 60 kPa is Pressure4, then the correction factor corresponding to the ambient pressure of 60 kPa in the correction factor table is Pressure4 / Pressure3.

[0106] Table 2

[0107] Atmospheric pressure 60 70 80 90 100 110 Correction coefficient 0.5 0.6 0.7 0.8 0.95 1

[0108] (5) Obtain the target base boost pressure corresponding to the current speed by multiplying the first base boost pressure and the pressure correction coefficient.

[0109] For example, during the operation of the range extender, based on the current speed n, the first base boost pressure P1 can be obtained by looking up Table 1. Then, based on the current ambient pressure, the correction coefficient k1 is obtained by looking up Table 2. At this time, the target base boost pressure BaseTurboPress1 = P1 * k1. Then, based on the relationship between the expected boost pressure DsrdTurboPress1 and the base boost pressure, it is determined whether the flag bit is true.

[0110] E2. If the sum of the desired boost pressure and the first hysteresis offset is greater than the target base boost pressure, then the boost pressure flag is determined to be true.

[0111] The value of the first hysteresis offset can be determined based on the actual application scenario. For example, the first hysteresis offset can be 2.

[0112] Specifically, to prevent frequent fluctuations in the boost pressure flag EWGActiveFlg, if the desired boost pressure increases from small to large, the boost pressure flag EWGActiveFlg will be true when the sum of the desired boost pressure and the first hysteresis offset is greater than the target base boost pressure.

[0113] E3. If the difference between the desired boost pressure and the second hysteresis offset is less than the target base boost pressure, then the boost pressure flag is determined to be false.

[0114] The value of the second hysteresis offset can be determined based on the actual application scenario. For example, the second hysteresis offset can be 2.

[0115] Specifically, if the desired boost pressure decreases, and the difference between the desired boost pressure and the second hysteresis offset is less than the target base boost pressure, the boost pressure flag EWGActiveFlg is false.

[0116] When the range extender is operating, based on the current speed and ambient pressure, the boost pressure flag EWGActiveFlg is true when the desired boost pressure exceeds the target baseline boost pressure. This indicates that the exhaust bypass valve can be activated under this condition to achieve the boost function. It should be noted that if the desired boost pressure is at a critical point, the boost pressure flag EWGActiveFlg may fluctuate frequently; therefore, a hysteresis handling module is added.

[0117] Reference Figure 2b As shown, Figure 2b This is a control logic diagram of the electric supercharger control method. When all five conditions mentioned above are met, the final active EWGFlg flag for the exhaust bypass valve is true; otherwise, it is false. By using these judgment conditions, the stability of the range extender during operation can be improved, thereby enhancing the overall vehicle NVH quality and reducing energy waste.

[0118] The electric supercharger control method disclosed herein acquires the control flags of the waste gas bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag. When all of these flags are true, the waste gas bypass valve is controlled to operate normally. Specifically, the waste gas bypass valve control flag indicates whether the waste gas bypass valve's position control has been successfully learned. The throttle valve control flag indicates whether the throttle valve's position control has been successfully learned. The boost pressure signal sensor's diagnostic flag indicates whether the boost pressure sensor is functioning correctly. The throttle valve position signal flag indicates whether the actual throttle valve position feedback signal value is greater than the preset throttle valve position feedback signal value. The boost pressure flag indicates whether the desired boost pressure is greater than the base boost pressure. By acquiring the control flags of the exhaust bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag, the exhaust bypass valve can only function normally when all five flags are true, thereby achieving the boost function. This can improve the stability of the range extender during operation, thereby improving the overall NVH quality of the vehicle and reducing energy waste.

[0119] In some embodiments, refer to Figure 3 As shown, a control device 300 for an electric supercharger is provided, comprising:

[0120] The acquisition module 310 is used to acquire the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag. The control flag of the waste gas bypass valve is used to indicate whether the position control of the waste gas bypass valve has been successfully learned. The control flag of the throttle valve is used to indicate whether the position control of the throttle valve has been successfully learned. The diagnostic flag of the boost pressure signal sensor is used to indicate whether the boost pressure sensor is diagnosed as normal. The position signal flag of the throttle valve is used to indicate whether the actual position feedback signal value of the throttle valve is greater than the preset position feedback signal value of the throttle valve. The boost pressure flag is used to indicate whether the expected boost pressure is greater than the base boost pressure.

[0121] The control module 320 is used to control the waste gas bypass valve to work normally when the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag are all true.

[0122] As an optional implementation of this disclosure, the acquisition module is specifically used for:

[0123] If the boost pressure sensor diagnosis is normal, then the diagnostic flag bit of the boost pressure signal sensor is determined to be true. As an optional implementation of this disclosure, the acquisition module is further specifically used for:

[0124] If the actual throttle position feedback signal value is greater than the preset throttle position feedback signal value, then the throttle position signal flag is determined to be true.

[0125] As an optional implementation of this disclosure, the acquisition module is further specifically used for:

[0126] Obtain the desired boost pressure and the target base boost pressure;

[0127] If the sum of the desired boost pressure and the first hysteresis offset is greater than the target base boost pressure, then the boost pressure flag is determined to be true.

[0128] If the difference between the desired boost pressure and the second hysteresis offset is less than the target base boost pressure, then the boost pressure flag is determined to be false.

[0129] As an optional implementation of this disclosure, obtaining the desired boost pressure and the target base boost pressure includes:

[0130] Obtain the current speed and desired torque of the range extender;

[0131] Calculate the desired boost pressure based on the desired torque;

[0132] Based on the first preset calibration table, the first base boost pressure corresponding to the current speed is obtained; the first preset calibration table is used to represent the correspondence between the speed of the range extender and the base boost pressure.

[0133] Based on the second preset calibration table, the pressure correction coefficient corresponding to the current environmental pressure is obtained; the second preset calibration table is used to represent the correspondence between atmospheric pressure and pressure correction coefficient at different altitudes;

[0134] The target base boost pressure corresponding to the current rotational speed is obtained by multiplying the first base boost pressure and the pressure correction coefficient.

[0135] As an optional implementation of this disclosure, obtaining the pressure correction coefficient corresponding to the current environmental pressure based on the second preset calibration table includes:

[0136] With the throttle fully open, obtain the first basic boost pressure of the range extender at different speeds;

[0137] Under different environmental pressures, the second basic boost pressure of the range extender at different speeds is obtained;

[0138] Based on the ratio of the second base boost pressure to the first base boost pressure, obtain the pressure correction coefficient corresponding to different environmental pressures.

[0139] The control device for the electric supercharger disclosed herein acquires the control flags of the wastegate bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag. When all of these flags are true, the wastegate bypass valve is controlled to operate normally. Specifically, the wastegate bypass valve control flag indicates whether the wastegate bypass valve's position control has been successfully learned. The throttle valve control flag indicates whether the throttle valve's position control has been successfully learned. The boost pressure signal sensor's diagnostic flag indicates whether the boost pressure sensor is functioning correctly. The throttle valve position signal flag indicates whether the actual throttle valve position feedback signal value is greater than the preset throttle valve position feedback signal value. The boost pressure flag indicates whether the desired boost pressure is greater than the base boost pressure. By acquiring the control flags of the exhaust bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag, the exhaust bypass valve can only function normally when all five flags are true, thereby achieving the boost function. This can improve the stability of the range extender during operation, thereby improving the overall NVH quality of the vehicle and reducing energy waste.

[0140] Specific limitations regarding the control device for the electric supercharger can be found in the above description of the control method for the electric supercharger, and will not be repeated here. Each module in the aforementioned control device for the electric supercharger can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the electronic device in hardware form or independent of the electronic device's processor, or they can be stored in the processor of the electronic device in software form, so that the processor can call and execute the corresponding operations of each module.

[0141] This disclosure also provides an electronic device. Figure 4 This disclosure provides a schematic diagram of the structure of an electronic device according to an embodiment. (See attached diagram.) Figure 4As shown, the electronic device provided in this embodiment includes a memory 41 and a processor 42. The memory 41 stores computer programs; the processor 42 executes the steps of any embodiment of the fault identification method for the image acquisition device provided in the above method embodiments when the computer program is invoked. The electronic device includes a processor, a memory, a communication interface, a display screen, and an input device connected via a system bus. The processor of the electronic device provides computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. When the computer program is executed by the processor, it implements a fault identification method for an image acquisition device. The display screen of the electronic device can be a liquid crystal display screen or an electronic ink display screen. The input device of the electronic device can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad provided on the casing of a computer device, or an external keyboard, touchpad, or mouse, etc.

[0142] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present disclosure and does not constitute a limitation on the computer device to which the present disclosure is applied. Specific electronic devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0143] In some embodiments, the control device for the electric supercharger provided in this disclosure can be implemented in the form of a computer, and the computer program can be implemented in, for example, Figure 4 The electronic device shown operates on this device. The memory of the electronic device can store the various program modules of the control unit that constitutes the electric supercharger of the electronic device, for example, Figure 3 The acquisition module 310 and control module 320 are shown. The computer program, composed of these various program modules, causes the processor to execute the steps in the fault identification method of the image acquisition device of the electronic device of the various embodiments of this disclosure described in this specification.

[0144] This disclosure also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the fault identification method for the image acquisition device provided in the above-described method embodiments.

[0145] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media containing computer-usable program code.

[0146] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0147] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0148] Computer-readable media include both permanent and non-permanent, removable and non-removable storage media. Storage media can store information using 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, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media do not include transient computer-readable media, such as modulated data signals and carrier waves.

[0149] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0150] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for an electric supercharger, characterized in that, include: The system acquires the control flags of the wastegate bypass valve, throttle valve, boost pressure sensor, throttle valve position signal, and boost pressure. The wastegate bypass valve control flag indicates whether the position control of the wastegate bypass valve has been successfully learned. The throttle valve control flag indicates whether the position control of the throttle valve has been successfully learned. The boost pressure sensor diagnostic flag indicates whether the boost pressure sensor is functioning correctly. The throttle valve position signal flag indicates whether the actual throttle valve position feedback signal value is greater than the preset throttle valve position feedback signal value. The boost pressure flag indicates whether the desired boost pressure is greater than the base boost pressure. When the control flag of the exhaust bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag are all true, the exhaust bypass valve is controlled to work normally.

2. The method according to claim 1, characterized in that, The acquisition of the control flags of the waste gas bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag includes: If the boost pressure sensor is diagnosed normally, then the diagnostic flag of the boost pressure signal sensor is determined to be true.

3. The method according to claim 1, characterized in that, The acquisition of the control flags of the waste gas bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag also includes: If the actual throttle position feedback signal value is greater than the preset throttle position feedback signal value, then the throttle position signal flag is determined to be true.

4. The method according to claim 1, characterized in that, The acquisition of the control flags of the waste gas bypass valve, the throttle valve, the diagnostic flag of the boost pressure signal sensor, the throttle valve position signal flag, and the boost pressure flag also includes: Obtain the desired boost pressure and the target base boost pressure; If the sum of the desired boost pressure and the first hysteresis offset is greater than the target base boost pressure, then the boost pressure flag is determined to be true. If the difference between the desired boost pressure and the second hysteresis offset is less than the target base boost pressure, then the boost pressure flag is determined to be false.

5. The method according to claim 4, characterized in that, The process of obtaining the desired boost pressure and the target base boost pressure includes: Obtain the current speed and desired torque of the range extender; Calculate the desired boost pressure based on the desired torque; Based on the first preset calibration table, the first base boost pressure corresponding to the current speed is obtained; the first preset calibration table is used to represent the correspondence between the speed of the range extender and the base boost pressure. Based on the second preset calibration table, the pressure correction coefficient corresponding to the current environmental pressure is obtained; the second preset calibration table is used to represent the correspondence between atmospheric pressure and pressure correction coefficient at different altitudes; The target base boost pressure corresponding to the current rotational speed is obtained by multiplying the first base boost pressure and the pressure correction coefficient.

6. The method according to claim 5, characterized in that, The step of obtaining the pressure correction coefficient corresponding to the current environmental pressure based on the second preset calibration table includes: With the throttle fully open, obtain the first basic boost pressure of the range extender at different speeds; Under different environmental pressures, the second basic boost pressure of the range extender at different speeds is obtained; Based on the ratio of the second base boost pressure to the first base boost pressure, obtain the pressure correction coefficient corresponding to different environmental pressures.

7. A control device for an electric booster, characterized in that, include: The acquisition module is used to acquire the control flags of the waste gas bypass valve, the control flags of the throttle valve, the diagnostic flags of the boost pressure signal sensor, the position signal flags of the throttle valve, and the boost pressure flags. The control module is used to control the waste gas bypass valve to work normally when the control flag of the waste gas bypass valve, the control flag of the throttle valve, the diagnostic flag of the boost pressure signal sensor, the position signal flag of the throttle valve, and the boost pressure flag are all true.

8. An electronic device, characterized in that, include: One or more processors; Storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the electric supercharger control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the electric supercharger control method as described in any one of claims 1 to 6.

10. A vehicle, characterized in that, include: The electronic device as described in claim 8.

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