Boost pressure control method and device, electronic equipment, medium and vehicle

Abstract

The invention relates to a boost pressure control method and device, electronic equipment, a medium and a vehicle. The method comprises the steps that basic supercharging pressure, original expected supercharging pressure and actual supercharging pressure are obtained; according to the magnitude relation of the basic supercharging pressure, the original expected supercharging pressure and the actual supercharging pressure, first target expected supercharging pressure is obtained; according to the size relation between the difference value of the original expected supercharging pressure and the actual supercharging pressure and a first preset threshold value and the size relation between the actual supercharging pressure change rate and the preset pressure change rate, second target expected supercharging pressure is obtained; and comparing the first target expected boost pressure with the second target expected boost pressure, and taking the smaller value in the first target expected boost pressure and the second target expected boost pressure as the target expected boost pressure. According to the method, the problem of overshoot of the actual boost pressure of the range extender in a large-load state can be prevented.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicle control, and particularly relates to a supercharging pressure control method and device, electronic equipment, medium and vehicle. BACKGROUND

[0002] The supercharger is one of the commonly used components of the engine, and its main function is to compress the air entering the cylinder of the engine and adjust the supercharging pressure of the engine to meet the performance requirements of the engine.

[0003] In the related art, when the supercharger control system calculates the expected supercharging pressure according to the expected torque, the expected supercharging pressure is directly applied to the supercharging control module to realize closed-loop control of the supercharging pressure by adjusting the exhaust gas bypass valve. However, this method is prone to cause overshoot of the actual supercharging pressure when the supercharger is in a heavy load state, that is, the actual supercharging pressure exceeds the expected supercharging pressure, resulting in unstable control and further causing the exhaust gas bypass valve to vibrate.

[0004] Therefore, how to prevent the actual supercharging pressure of the supercharger from overshooting in a heavy load state is a technical problem that needs to be solved at present. SUMMARY

[0005] To solve the above technical problems, the present disclosure provides a supercharging pressure control method, device, electronic equipment, medium and vehicle.

[0006] In a first aspect, the present disclosure provides a supercharging pressure control method, comprising:

[0007] obtaining a basic supercharging pressure, an original expected supercharging pressure and an actual supercharging pressure;

[0008] obtaining a first target expected supercharging pressure according to the size relationship among the basic supercharging pressure, the original expected supercharging pressure and the actual supercharging pressure;

[0009] obtaining a second target expected supercharging pressure according to the size relationship between the difference between the original expected supercharging pressure and the actual supercharging pressure and a first preset threshold value, and the size relationship between the actual supercharging pressure change rate and a preset pressure change rate;

[0010] comparing the first target expected supercharging pressure and the second target expected supercharging pressure, and taking the smaller value of the first target expected supercharging pressure and the second target expected supercharging pressure as a target expected supercharging pressure.

[0011] As an optional implementation manner of an embodiment of the present disclosure, the obtaining a first target expected supercharging pressure according to the size relationship among the basic supercharging pressure, the original expected supercharging pressure and the actual supercharging pressure comprises:

[0012] When the original expected boost pressure is greater than the basic boost pressure and the actual boost pressure is greater than or equal to the basic boost pressure, a rate offset is obtained based on a first preset query table; the first preset query table comprises a corresponding relationship among a supercharger rotating speed, the basic boost pressure and the rate offset;

[0013] A current maximum rate limit value is calculated according to the rate offset and a historical maximum rate limit value;

[0014] A comparison is made between the current maximum rate limit value and the original expected boost pressure, and a smaller one of the current maximum rate limit value and the original expected boost pressure is taken as a first target expected boost pressure.

[0015] As an optional implementation of the embodiment of the present disclosure, the first target expected boost pressure is obtained according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure, and the method further comprises:

[0016] When the original expected boost pressure is less than or equal to the basic boost pressure, the basic boost pressure is determined as the current maximum rate limit value, and the original expected boost pressure is determined as the first target expected boost pressure.

[0017] As an optional implementation of the embodiment of the present disclosure, the first target expected boost pressure is obtained according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure, and the method further comprises:

[0018] When the original expected boost pressure is greater than the basic boost pressure and the actual boost pressure is less than the basic boost pressure, the basic boost pressure is determined as the current maximum rate limit value, and the original expected boost pressure is determined as the first target expected boost pressure.

[0019] As an optional implementation of the embodiment of the present disclosure, the second target expected boost pressure is obtained according to a size relationship between a difference between the original expected boost pressure and the actual boost pressure and a first preset threshold value, and a size relationship between an actual boost pressure change rate and a preset pressure change rate, and the method comprises:

[0020] When the difference between the original expected boost pressure and the actual boost pressure is less than or equal to the first preset threshold value and the actual boost pressure change rate is greater than or equal to the preset pressure change rate, a compensation amount of the original expected boost pressure is obtained according to a second preset query table; the second preset query table comprises a corresponding relationship among a supercharger rotating speed, a rate offset and the compensation amount of the original expected boost pressure;

[0021] According to the original expected boost pressure and the compensation amount of the original expected boost pressure, a second target expected boost pressure is calculated.

[0022] As an optional implementation of the embodiment of the present disclosure, the second target expected boost pressure is obtained according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and the first preset threshold, and the size relationship between the actual boost pressure change rate and the preset pressure change rate, and the method further includes:

[0023] When the difference between the original expected boost pressure and the actual boost pressure is greater than the first preset threshold, or the actual boost pressure change rate is less than the preset pressure change rate, the original expected boost pressure is determined as the second target expected boost pressure.

[0024] As an optional implementation of the embodiment of the present disclosure, the obtaining of the base boost pressure, the original expected boost pressure and the actual boost pressure includes:

[0025] The base boost pressure is obtained according to the range extender speed and a third preset query table; the third preset query table is used to represent the corresponding relationship between the range extender speed and the base boost pressure.

[0026] The original expected boost pressure is obtained according to the expected torque calculation;

[0027] The actual boost pressure is obtained according to the boost pressure sensor measurement.

[0028] In a second aspect, the embodiment of the present disclosure provides a boost pressure control device, which includes:

[0029] The obtaining module is configured to obtain a base boost pressure, an original expected boost pressure and an actual boost pressure;

[0030] The comparison module is configured to obtain a first target expected boost pressure according to the size relationship among the base boost pressure, the original expected boost pressure and the actual boost pressure;

[0031] The judgment module is configured to obtain a second target expected boost pressure according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and the first preset threshold, and the size relationship between the actual boost pressure change rate and the preset pressure change rate;

[0032] The determination module is configured to compare the first target expected boost pressure and the second target expected boost pressure, and take the smaller value between the first target expected boost pressure and the second target expected boost pressure as a target expected boost pressure.

[0033] As an optional implementation of the embodiment of the present disclosure, the comparison module is specifically configured to:

[0034] when the original expected boost pressure is greater than the base boost pressure and the actual boost pressure is greater than or equal to the base boost pressure, obtaining a rate offset based on a first preset lookup table; the first preset lookup table comprises a corresponding relationship among a supercharger rotating speed, the base boost pressure and the rate offset;

[0035] calculating a current maximum rate limit value according to the rate offset and a historical maximum rate limit value;

[0036] comparing the current maximum rate limit value and the original expected boost pressure, and taking a smaller one of the current maximum rate limit value and the original expected boost pressure as a first target expected boost pressure.

[0037] As an optional implementation of the embodiment of the present disclosure, the comparison module is further specifically configured to:

[0038] when the original expected boost pressure is less than or equal to the base boost pressure, determining the base boost pressure as the current maximum rate limit value and determining the original expected boost pressure as a target expected boost pressure.

[0039] As an optional implementation of the embodiment of the present disclosure, the comparison module is further specifically configured to:

[0040] when the original expected boost pressure is greater than the base boost pressure and the actual boost pressure is less than the base boost pressure, determining the base boost pressure as the current maximum rate limit value and determining the original expected boost pressure as a target expected boost pressure.

[0041] As an optional implementation of the embodiment of the present disclosure, the judgment module is specifically configured to:

[0042] when a difference between the original expected boost pressure and the actual boost pressure is less than or equal to a first preset threshold value and an actual boost pressure change rate is greater than or equal to a preset pressure change rate, obtaining a compensation amount of the original expected boost pressure according to a second preset lookup table; the second preset lookup table comprises a corresponding relationship among a supercharger rotating speed, a rate offset and the compensation amount of the original expected boost pressure;

[0043] calculating a second target expected boost pressure according to the original expected boost pressure and the compensation amount of the original expected boost pressure.

[0044] As an optional implementation of the embodiment of the present disclosure, the judgment module is further specifically configured to:

[0045] When the difference between the original expected boost pressure and the actual boost pressure is greater than the first preset threshold, or the actual boost pressure change rate is less than the preset pressure change rate, the original expected boost pressure is determined as a second target expected boost pressure.

[0046] As an optional implementation of the embodiments of the present disclosure, the acquisition module is specifically configured to:

[0047] According to the supercharger speed and a third preset query table, the basic boost pressure is acquired; the third preset query table is used to represent the corresponding relationship between the supercharger speed and the basic boost pressure;

[0048] According to the expected torque calculation, the original expected boost pressure is acquired;

[0049] According to the boost pressure sensor measurement, the actual boost pressure is acquired.

[0050] In a third aspect, the embodiments of the present disclosure provide an electronic device, comprising: one or more processors;

[0051] a storage device configured to store one or more programs,

[0052] When the one or more programs are executed by the one or more processors, the one or more processors implement the boost pressure control method according to any one of the embodiments of the first aspect.

[0053] In a fourth aspect, the embodiments of the present disclosure provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the boost pressure control method according to any one of the embodiments of the first aspect.

[0054] In a fifth aspect, the embodiments of the present disclosure provide a vehicle, comprising the electronic device according to the third aspect.

[0055] Compared with the prior art, the technical scheme provided by the embodiments of the present disclosure has the following advantages: the basic supercharging pressure, the original expected supercharging pressure and the actual supercharging pressure are obtained; the basic supercharging pressure, the original expected supercharging pressure and the actual supercharging pressure are obtained; the first target expected supercharging pressure is obtained according to the size relationship of the basic supercharging pressure, the original expected supercharging pressure and the actual supercharging pressure; the second target expected supercharging pressure is obtained according to the size relationship of the difference between the original expected supercharging pressure and the actual supercharging pressure and the first preset threshold value, and the size relationship of the actual supercharging pressure change rate and the preset pressure change rate; the first target expected supercharging pressure and the second target expected supercharging pressure are compared, and the smaller value of the first target expected supercharging pressure and the second target expected supercharging pressure is taken as the target expected supercharging pressure. By obtaining the basic supercharging pressure, the original expected supercharging pressure and the actual supercharging pressure, on the one hand, the expected supercharging pressure rate is limited, and on the other hand, when the actual supercharging pressure approaches the expected supercharging pressure, the expected supercharging pressure is compensated, and then the minimum value of the two is taken to obtain the final expected supercharging pressure (i.e. the target expected supercharging pressure) for supercharging closed-loop control, which can prevent the actual supercharging pressure of the supercharger from overshooting in a high load state, further improve the supercharging control stability and reduce the risk of the exhaust gas bypass valve hitting the limit position. BRIEF DESCRIPTION OF DRAWINGS

[0056] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the accompanying drawings required to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0058] Figure 1 is a system configuration schematic diagram of an intake and exhaust pipeline and related electrical controls;

[0059] Figure 2 is a flow schematic diagram of a supercharging pressure control method provided by an embodiment of the present disclosure;

[0060] Figure 3 is a structural schematic diagram of a supercharging pressure control device provided by an embodiment of the present disclosure;

[0061] Figure 4 is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0062] In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present disclosure, the schemes of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict, if necessary.

[0063] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other different manners from those described herein; obviously, the embodiments described in the specification are only a part of the embodiments of the present disclosure, and not all the embodiments.

[0064] The terms “first” and “second” and the like relational terms in the specification and claims of the present disclosure are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations.

[0065] In the embodiments of the present disclosure, the words “exemplary” or “for example” are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as “exemplary” or “for example” in the embodiments of the present disclosure should not be construed as being preferred or superior over other embodiments or design solutions. In fact, the use of the words “exemplary” or “for example” is intended to present concepts in a concrete manner. In addition, in the description of the embodiments of the present disclosure, the meaning of “plurality” is two or more, unless otherwise specified.

[0066] Electronic Waste Gate (EWG) is an important component of the exhaust system of an automobile engine. Its main function is to regulate and control the flow direction of exhaust gas to optimize the performance and emissions of the engine. When the boost pressure in the compressor exceeds the predetermined value, the air pressure pushes the diaphragm to compress the spring, and the pull rod is pushed outwards to open the waste gate valve, guiding part of the exhaust gas to enter the exhaust pipe directly from the bypass valve installed before the turbine, thereby reducing the amount and pressure of exhaust gas pushing the turbine to rotate, and further reducing the turbine speed and boost pressure, avoiding the phenomenon of “over-boosting” of the engine.

[0067] Electronic Throttle Control (ETC) is an important control component of an automobile engine, which controls the intake air volume and speed of the vehicle, and is composed of an engine, a speed sensor, a throttle valve, etc. The use of an electronic throttle control system can enable precise control of the throttle opening.

[0068] 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.

[0069] 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.

[0070] In some embodiments, such as Figure 2 As shown, a method for controlling boosting pressure is provided, including the following steps S21-S24:

[0071] S21. Obtain the base boost pressure, the original expected boost pressure, and the actual boost pressure.

[0072] The base boost pressure refers to the maximum boost pressure that the range extender can generate based on the current engine speed when the turbocharger is not engaged. The initial desired boost pressure comes from the raw signal output by the torque module, which can be understood as the required boost pressure corresponding to the accelerator pedal opening. The boost module processes the initial desired boost pressure according to the local protection mechanisms of the turbocharger and range extender. The actual boost pressure is obtained by measuring the boost pressure sensor.

[0073] In some embodiments, step S21 (obtaining the base boost pressure, the original desired boost pressure, and the actual boost pressure) can be implemented in the following manner:

[0074] The base boost pressure is obtained based on the range extender speed and the third preset lookup table.

[0075] The third preset query table is used to represent the corresponding relationship between the range extender rotating speed and the base turbo pressure.

[0076] The original expected turbo pressure is calculated according to the expected torque;

[0077] The actual turbo pressure is obtained according to the turbo pressure sensor measurement.

[0078] Specifically, when the exhaust bypass valve is in the default position (i.e., the full open state), the exhaust gas generated during the operation of the range extender will not all pass through the exhaust bypass valve, and part of the exhaust gas will pass through the turbocharger turbine, thereby driving the turbocharger impeller to rotate. At this time, the generated turbo pressure is called the base turbo pressure. The third preset query table is used to represent the corresponding relationship between the range extender rotating speed and the base turbo pressure.

[0079] For example, the base turbo pressure is related to the range extender rotating speed, and the corresponding relationship can be referred to Table 1. In Table 1, the input is the range extender rotating speed, the rotating speed interval is 1000-4000, and the interval is 500. The calibration process of Table 1 is as follows: fix the range extender at the corresponding rotating speed, and place the throttle valve in the full open position. Record the value measured by the turbo pressure sensor as Pressure1, and fill this value into the corresponding table.

[0080] Table 1

[0081] RPM 1000 1500 2000 2500 3000 3500 4000 Base boost pressure 110 115 120 125 135 137 140

[0082] S22, a first target expected turbo pressure is obtained according to the size relationship among the base turbo pressure, the original expected turbo pressure, and the actual turbo pressure.

[0083] In some embodiments, the above step S22 (obtaining a first target expected turbo pressure according to the size relationship among the base turbo pressure, the original expected turbo pressure, and the actual turbo pressure) can be realized by the following way:

[0084] When the original expected turbo pressure is less than or equal to the base turbo pressure, the base turbo pressure is determined as the current maximum rate limit value, and the original expected turbo pressure is determined as the target expected turbo pressure.

[0085] Specifically, when the range extender is not working, i.e., the position of the exhaust bypass valve is in the full open state, a small amount of exhaust gas will pass through the turbine to achieve partial turbocharging. At this time, the generated turbo pressure is the base turbo pressure (refer to Table 1). When the original expected turbo pressure is less than or equal to the base turbo pressure, the exhaust bypass valve does not need to be actuated at this time, so the expected turbo pressure rate is not limited, i.e., the maximum rate limit value MaxRateLmt is BaseBoostPress.

[0086] In some embodiments, the step S22 (obtaining the first target desired boost pressure according to the magnitude relationship among the base boost pressure, the original desired boost pressure and the actual boost pressure) can be implemented in the following way:

[0087] When the original desired boost pressure is greater than the base boost pressure and the actual boost pressure is less than the base boost pressure, the base boost pressure is determined as the current maximum rate limit value, and the original desired boost pressure is determined as the target desired boost pressure.

[0088] Specifically, when the original desired boost pressure is greater than the base boost pressure and the actual boost pressure is less than the base boost pressure, it indicates that the actual boost capacity is relatively small, and the desired boost pressure is not limited at this stage, which can improve the response, i.e., the maximum rate limit value MaxRateLmt is BaseBoostPress. The actual boost pressure is measured by a boost pressure sensor.

[0089] In some embodiments, the step S22 (obtaining the first target desired boost pressure according to the magnitude relationship among the base boost pressure, the original desired boost pressure and the actual boost pressure) can be implemented in the following way:

[0090] A. When the original desired boost pressure is greater than the base boost pressure and the actual boost pressure is greater than or equal to the base boost pressure, a rate offset is obtained based on a first preset query table.

[0091] The first preset query table includes a corresponding relationship among the supercharger speed, the base boost pressure and the rate offset.

[0092] Specifically, when the original desired boost pressure is greater than the base boost pressure and the actual boost pressure is greater than or equal to the base boost pressure, the desired boost pressure needs to be rate-limited to prevent the exhaust gas bypass valve from adjusting too fast and hitting the limit position. The rate limit is obtained through Table 2 (i.e., the first preset query table), which is a two-dimensional table with the supercharger speed and the actual boost pressure as inputs and the rate offset as output.

[0093] Table 2

[0094]

[0095] B. A current maximum rate limit value is calculated according to the rate offset and a historical maximum rate limit value.

[0096] C. comparing the current maximum rate limit value with the original expected boost pressure, and taking the smaller one of the current maximum rate limit value and the original expected boost pressure as a target expected boost pressure.

[0097] Specifically, the rate offset is obtained by the supercharger speed and the actual boost pressure, and the maximum rate limit value is obtained by adding the rate offset to the last maximum rate limit value. The original expected boost pressure is compared with the maximum rate limit value, and the smaller one of the two is taken as the target expected boost pressure.

[0098] S23. obtaining a second target expected boost pressure according to a size relationship between a difference between the original expected boost pressure and the actual boost pressure and a first preset threshold value, and a size relationship between an actual boost pressure change rate and a preset pressure change rate.

[0099] In some embodiments, the step S23 (obtaining a second target expected boost pressure according to a size relationship between a difference between the original expected boost pressure and the actual boost pressure and a first preset threshold value, and a size relationship between an actual boost pressure change rate and a preset pressure change rate) can be implemented in the following way:

[0100] (1) when the difference between the original expected boost pressure and the actual boost pressure is less than or equal to the first preset threshold value, and the actual boost pressure change rate is greater than or equal to the preset pressure change rate, obtaining a compensation amount of the original expected boost pressure according to a second preset query table;

[0101] The first preset threshold value can be determined according to the actual application scene, for example, the first preset threshold value can be 10. The second preset query table includes a corresponding relationship between the supercharger speed, the rate offset and the compensation amount of the original expected boost pressure. The preset pressure change rate can be obtained by Table 3. Table 3 is the second preset query table, which includes a corresponding relationship between the supercharger speed, the rate offset and the compensation amount of the original expected boost pressure.

[0102] (2) calculating the second target expected boost pressure according to the original expected boost pressure and the compensation amount of the original expected boost pressure.

[0103] Specifically, when the difference between the original expected boost pressure RawDsrdBoostPress and the actual boost pressure ActBoostPress is less than or equal to C_BoostErrEnbl (which can be calibrated, and the reference value is 10), and the actual boost pressure change rate ActBoostPressRate is greater than or equal to the preset pressure change rate, the original expected boost pressure is compensated.

[0104] For example, the compensation amount of the original desired boost pressure is obtained by looking up Table 3 (the input is the speed of the range extender, the pressure deviation of the original desired boost pressure and the actual boost pressure), and the compensation amount BstCmp is obtained, and then the desired boost pressure DsrdBoostPress2 under the condition is equal to RawDsrdBoostPress minus BstCmp.

[0105] Table 3

[0106]

[0107] In some embodiments, the step S23 (obtaining the second target desired boost pressure according to the size relationship between the difference between the original desired boost pressure and the actual boost pressure and the first preset threshold, and the size relationship between the actual boost pressure change rate and the preset pressure change rate) can also be realized by the following way:

[0108] When the difference between the original desired boost pressure and the actual boost pressure is greater than the first preset threshold, or the actual boost pressure change rate is less than the preset pressure change rate, the original desired boost pressure is determined as the second target desired boost pressure.

[0109] Specifically, when the difference between the original desired boost pressure and the actual boost pressure is greater than the first preset threshold, or the actual boost pressure change rate is less than the preset pressure change rate, the second target desired boost pressure DsrdBoostPress2 is equal to the original desired boost pressure RawDsrdBoostPress.

[0110] S24, comparing the first target desired boost pressure and the second target desired boost pressure, and taking the smaller value of the first target desired boost pressure and the second target desired boost pressure as the target desired boost pressure.

[0111] Specifically, after obtaining the first target desired boost pressure DsrdBoostPress1 and the second target desired boost pressure DsrdBoostPress2, the minimum value of the two is taken as the final desired boost pressure FinalDsrdBoostPress, which is used for boost closed-loop control.

[0112] The boost pressure control method provided by the present disclosure comprises the following steps: obtaining a basic boost pressure, an original expected boost pressure and an actual boost pressure; obtaining the basic boost pressure, the original expected boost pressure and the actual boost pressure; obtaining a first target expected boost pressure according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure; obtaining a second target expected boost pressure according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and a first preset threshold value, and the size relationship between the actual boost pressure change rate and a preset pressure change rate; and comparing the first target expected boost pressure and the second target expected boost pressure, and taking the smaller value of the first target expected boost pressure and the second target expected boost pressure as a target expected boost pressure. By obtaining the basic boost pressure, the original expected boost pressure and the actual boost pressure, on the one hand, the expected boost pressure rate is limited, and on the other hand, when the actual boost pressure approaches the expected boost pressure, the expected boost pressure is compensated, and then the minimum value is taken to obtain the final expected boost pressure (i.e. the target expected boost pressure) for boost closed-loop control, which can prevent the actual boost pressure of the supercharger from overshooting in a large load state, further improve the boost control stability and reduce the risk of the exhaust gas bypass valve hitting the limit position.

[0113] In some embodiments, referring to Figure 3 A boost pressure control device 300 is provided, comprising:

[0114] An obtaining module 310 is configured to obtain a basic boost pressure, an original expected boost pressure and an actual boost pressure.

[0115] A comparison module 320 is configured to obtain a first target expected boost pressure according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure.

[0116] A determination module 330 is configured to obtain a second target expected boost pressure according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and a first preset threshold value, and the size relationship between the actual boost pressure change rate and a preset pressure change rate.

[0117] A determining module 340 is configured to compare the first target expected boost pressure and the second target expected boost pressure, and take the smaller value of the first target expected boost pressure and the second target expected boost pressure as a target expected boost pressure.

[0118] As an optional implementation of an embodiment of the present disclosure, the comparison module 320 is specifically configured to:

[0119] when the original expected boost pressure is greater than the basic boost pressure and the actual boost pressure is greater than or equal to the basic boost pressure, obtaining a rate offset based on a first preset query table; the first preset query table comprises a corresponding relationship among a supercharger rotating speed, the basic boost pressure and the rate offset;

[0120] calculating a current maximum rate limit value according to the rate offset and a historical maximum rate limit value;

[0121] comparing the current maximum rate limit value and the original expected boost pressure, and taking a smaller one of the current maximum rate limit value and the original expected boost pressure as a first target expected boost pressure.

[0122] As an optional implementation of the embodiment of the present disclosure, the comparison module 320 is further specifically configured to:

[0123] when the original expected boost pressure is less than or equal to the basic boost pressure, determining the basic boost pressure as the current maximum rate limit value, and determining the original expected boost pressure as a target expected boost pressure.

[0124] As an optional implementation of the embodiment of the present disclosure, the comparison module 320 is further specifically configured to:

[0125] when the original expected boost pressure is greater than the basic boost pressure and the actual boost pressure is less than the basic boost pressure, determining the basic boost pressure as the current maximum rate limit value, and determining the original expected boost pressure as a target expected boost pressure.

[0126] As an optional implementation of the embodiment of the present disclosure, the judgment module 330 is specifically configured to:

[0127] when a difference between the original expected boost pressure and the actual boost pressure is less than or equal to a first preset threshold value and an actual boost pressure change rate is greater than or equal to a preset pressure change rate, obtaining a compensation amount of the original expected boost pressure according to a second preset query table; the second preset query table comprises a corresponding relationship among a supercharger rotating speed, a rate offset and the compensation amount of the original expected boost pressure;

[0128] calculating a second target expected boost pressure according to the original expected boost pressure and the compensation amount of the original expected boost pressure.

[0129] As an optional implementation of the embodiment of the present disclosure, the judgment module 330 is further specifically configured to:

[0130] determining that the original expected boost pressure is a second target expected boost pressure when the difference between the original expected boost pressure and the actual boost pressure is greater than the first preset threshold, or the actual boost pressure change rate is less than the preset pressure change rate.

[0131] As an optional implementation of the embodiments of the present disclosure, the acquisition module 310 is specifically configured to:

[0132] acquiring a basic boost pressure according to the supercharger speed and a third preset query table, the third preset query table being used to represent a corresponding relationship between the supercharger speed and the basic boost pressure;

[0133] acquiring an original expected boost pressure according to the expected torque calculation;

[0134] acquiring the actual boost pressure according to the boost pressure sensor measurement.

[0135] The boost pressure control device provided by the present disclosure acquires the basic boost pressure, the original expected boost pressure and the actual boost pressure; acquires the basic boost pressure, the original expected boost pressure and the actual boost pressure; acquires a first target expected boost pressure according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure; acquires a second target expected boost pressure according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and the first preset threshold, and the size relationship between the actual boost pressure change rate and the preset pressure change rate; compares the first target expected boost pressure and the second target expected boost pressure, and takes the smaller value between the first target expected boost pressure and the second target expected boost pressure as the target expected boost pressure. By acquiring the basic boost pressure, the original expected boost pressure and the actual boost pressure, on the one hand, the expected boost pressure rate is limited, and on the other hand, when the actual boost pressure approaches the expected boost pressure, the expected boost pressure is compensated, and then the minimum value is taken to obtain the final expected boost pressure (i.e. the target expected boost pressure) for boost closed-loop control, which can prevent the actual boost pressure of the supercharger from overshooting in a large load state, further improve the boost control stability and reduce the risk of exhaust bypass valve impact limit position.

[0136] The specific limitations of the boost pressure control device can be referred to the limitations of the boost pressure control method in the above, which will not be repeated here. Each module in the above boost pressure control device can be realized by software, hardware and combinations thereof, in whole or in part. The above modules can be embedded in or independent of the processor of the electronic device in hardware form, or stored in the processor of the electronic device in software form, so as to call and execute the operations corresponding to each module by the processor.

[0137] The embodiments of the present disclosure further provide an electronic device, Figure 4A structural schematic diagram of an electronic device is provided in the embodiments of the present disclosure. As shown in Figure 4 The electronic device provided by the embodiments of the present disclosure includes a memory 41 and a processor 42. The memory 41 is configured to store a computer program. The processor 42 is configured to execute the steps performed by any one of the embodiments of the supercharging pressure control method provided by the above-mentioned method embodiments when invoking the computer program. The electronic device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. The processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The computer program is executed by the processor to implement a fault identification method of 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 overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc.

[0138] Those skilled in the art can understand that Figure 4 The structure shown in the above-mentioned embodiments is only a block diagram of part 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. Specifically, the electronic device can include more or fewer components than those shown in the diagram, or combine certain components, or have a different arrangement of components.

[0139] In some embodiments, the supercharging pressure control device provided by the present disclosure can be implemented in the form of a computer. The computer program can run on the electronic device as shown in Figure 4 The memory of the electronic device can store various program modules constituting the supercharging pressure control device of the electronic device, such as the acquisition module 310, the determination module 320, the query module 330, the calculation module 340 and the comparison module 350 shown in Figure 3 The computer program constituted by the various program modules makes the processor execute the steps in the fault identification method of the image acquisition device of the electronic device of each embodiment of the present disclosure described in the specification.

[0140] The embodiments of the present disclosure also provide a computer readable storage medium having a computer program stored thereon. The computer program is executed by the processor to implement the fault identification method of the image acquisition device provided by the above-mentioned method embodiments.

[0141] Those skilled in the art will appreciate that embodiments of the disclosure can be supplied as a method, a system, or a computer program product. Thus, the disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the disclosure can take the form of a computer program product on one or more computer readable storage media having computer readable program code embodied therein.

[0142] The processor can be a Central Processing Unit (CPU), a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like. The general-purpose processor can be a microprocessor, or the processor can be any conventional processor.

[0143] The memory can include non-persistent memory, Random Access Memory (RAM), and / or non-volatile memory, etc. in the form of a computer-readable medium, such as read only memory (ROM) or flash memory, etc. The memory is an example of computer-readable media.

[0144] Computer-readable media includes permanent and non-permanent, movable and non-movable storage media. The storage media can be implemented by any method or technology to store information, which 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 technology, compact disc read only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic disk storage or other magnetic storage device, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, computer-readable media does not include transitory media, such as modulated data signals and carriers.

[0145] It has to be noted that, as used herein, the terms "includes", "including", "has", "having" or "has" are intended to be open-ended terms that specifically permit the inclusion of one or more elements, steps, features, components, or the like. As used herein, the term "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as exemplary is not necessarily to be construed as preferred or advantageous over other implementations.

[0146] The foregoing is merely illustrative of the principles of this disclosure and various modifications can be made by those skilled in the art without departing from the spirit and scope of the disclosure. The above embodiments are illustrative, and not restrictive. The scope of the disclosure should, therefore, be determined not with reference to the above description, but instead with reference to the appended claims, along with their full scope of equivalents.

Claims

1. A method of control of supercharging pressure, characterized by, The method comprises: obtaining a basic boost pressure, an original expected boost pressure and an actual boost pressure; obtaining a first target expected boost pressure according to a size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure; obtaining a second target expected boost pressure according to a size relationship between a difference between the original expected boost pressure and the actual boost pressure and a first preset threshold value, and a size relationship between an actual boost pressure change rate and a preset pressure change rate; comparing the first target expected boost pressure and the second target expected boost pressure, and taking a smaller value of the first target expected boost pressure and the second target expected boost pressure as a target expected boost pressure.

2. The method of claim 1, wherein, The method of obtaining the first target expected boost pressure according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure comprises: when the original expected boost pressure is greater than the basic boost pressure and the actual boost pressure is greater than or equal to the basic boost pressure, obtaining a rate offset based on a first preset query table; the first preset query table comprises a corresponding relationship among a supercharger rotating speed, the basic boost pressure and the rate offset; calculating a current maximum rate limit value according to the rate offset and a historical maximum rate limit value; comparing the current maximum rate limit value and the original expected boost pressure, and taking a smaller value of the current maximum rate limit value and the original expected boost pressure as the first target expected boost pressure.

3. The method of claim 1, wherein, The method of obtaining the first target expected boost pressure according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure further comprises: when the original expected boost pressure is less than or equal to the basic boost pressure, determining the basic boost pressure as the current maximum rate limit value, and determining the original expected boost pressure as the first target expected boost pressure.

4. The method of claim 1, wherein, The method of obtaining the first target expected boost pressure according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure further comprises: when the original expected boost pressure is greater than the basic boost pressure and the actual boost pressure is less than the basic boost pressure, determining the basic boost pressure as the current maximum rate limit value, and determining the original expected boost pressure as the first target expected boost pressure.

5. The method of claim 1, wherein, The method of obtaining the second target expected boost pressure according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and the first preset threshold value, and the size relationship between the actual boost pressure change rate and the preset pressure change rate comprises: when the difference between the original expected boost pressure and the actual boost pressure is less than or equal to the first preset threshold value and the actual boost pressure change rate is greater than or equal to the preset pressure change rate, obtaining a compensation amount of the original expected boost pressure according to a second preset query table; the second preset query table comprises a corresponding relationship among a supercharger rotating speed, a rate offset and the compensation amount of the original expected boost pressure. According to the original expected boost pressure and the compensation amount of the original expected boost pressure, a second target expected boost pressure is calculated.

6. The method of claim 1, wherein, The second target expected boost pressure is obtained according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and the first preset threshold, and the size relationship between the actual boost pressure change rate and the preset pressure change rate, and further comprising: When the difference between the original expected boost pressure and the actual boost pressure is greater than the first preset threshold, or the actual boost pressure change rate is less than the preset pressure change rate, the original expected boost pressure is determined as the second target expected boost pressure.

7. A supercharging pressure control device characterized by comprising: Comprising: An acquisition module is configured to acquire a basic boost pressure, an original expected boost pressure and an actual boost pressure; A comparison module is configured to acquire a first target expected boost pressure according to the size relationship among the basic boost pressure, the original expected boost pressure and the actual boost pressure; A judgment module is configured to acquire a second target expected boost pressure according to the size relationship between the difference between the original expected boost pressure and the actual boost pressure and the first preset threshold, and the size relationship between the actual boost pressure change rate and the preset pressure change rate; A determination module is configured to compare the first target expected boost pressure and the second target expected boost pressure, and take the smaller value as a target expected boost pressure.

8. An electronic device, comprising: Comprising: One or more processors; A storage device is configured to store 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 boost pressure control method as claimed in any one of claims 1-6.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the boost pressure control method as claimed in any one of claims 1-6.

10. A vehicle characterized by comprising: Comprising: The electronic device of claim 8.

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