Intake manifold pressure prediction method, device, electronic device and storage medium

Abstract

The present application discloses an intake manifold pressure prediction method, device, electronic device and storage medium. The method includes: determining the first pressure change slope at the current moment according to the first parameter information at the current moment; determining the second parameter information at the target moment according to the first parameter information and the reference pressure change slope, and determining the second pressure change slope at the target moment according to the second parameter information; determining the target pressure change slope according to the reference pressure change slope, the first pressure change slope and the second pressure change slope, and predicting the target intake manifold pressure at the target moment according to the target pressure change slope. The above scheme improves the prediction accuracy of the intake manifold pressure by comprehensively considering the reference pressure change slope and the first pressure change slope and the second pressure change slope calculated at two different moments, determining the target pressure change slope to predict the target intake manifold pressure.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an intake manifold pressure prediction method, device, electronic device and storage medium. Background Art

[0002] The engine relies on combustion to do work, and the fuel injection amount needs to be calculated based on the actual intake volume. However, the fuel injection amount calculation point of each cylinder of the engine is ahead of the actual intake end time. Therefore, when calculating the fuel injection amount, it is necessary to consider the intake volume change during this period, that is, the intake manifold pressure change, and based on this change, correct the calculated relative intake volume and relative fuel injection amount, so as to reduce the fluctuation of the air-fuel ratio during the transient process. In the prior art, the manifold pressure value at the fuel injection amount calculation point is used, and then assisted by bench calibration means, and pressure compensation is performed on transient operating conditions based on the pedal opening change rate to achieve the estimation of the intake manifold pressure at the end of intake. This method is simple to implement, has low accuracy, and the air-fuel ratio fluctuates greatly under transient conditions. Summary of the invention

[0003] The present application provides a method, device, electronic device and storage medium for predicting intake manifold pressure, which improve the prediction accuracy of intake manifold pressure.

[0004] According to one aspect of the present application, a method for predicting intake manifold pressure is provided, the method comprising:

[0005] Determine the first pressure change slope at the current moment according to the first parameter information at the current moment; wherein the first parameter information includes the first intake manifold pressure, the first throttle opening and the first throttle front-to-rear pressure ratio;

[0006] Determine the second parameter information at the target time according to the first parameter information and the reference pressure change slope, and determine the second pressure change slope at the target time according to the second parameter information; wherein the second parameter information includes a second intake manifold pressure, a second throttle opening, and a second throttle front-rear pressure ratio;

[0007] A target pressure change slope is determined according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope, and a target intake manifold pressure at a target time is predicted according to the target pressure change slope.

[0008] According to another aspect of the present application, there is provided an intake manifold pressure prediction device, the device comprising:

[0009] A first pressure change slope determination module, configured to determine a first pressure change slope at a current moment according to first parameter information at a current moment; wherein the first parameter information includes a first intake manifold pressure, a first throttle opening, and a first throttle front-rear pressure ratio;

[0010] a second pressure change slope determination module, configured to determine second parameter information at a target time according to the first parameter information and a reference pressure change slope, and determine a second pressure change slope at the target time according to the second parameter information; wherein the second parameter information includes a second intake manifold pressure, a second throttle opening, and a second throttle front-rear pressure ratio;

[0011] The target intake manifold pressure prediction module is used to determine a target pressure change slope according to the reference pressure change slope, the first pressure change slope and the second pressure change slope, and predict the target intake manifold pressure at a target time according to the target pressure change slope.

[0012] According to another aspect of the present application, an electronic device is provided, the electronic device comprising:

[0013] at least one processor; and

[0014] a memory communicatively connected to the at least one processor; wherein,

[0015] The memory stores a computer program that can be executed by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can perform the method described in any embodiment of the present invention.

[0016] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method described in any embodiment of the present invention when executed.

[0017] The technical solution of the embodiment of the present application is to determine the first pressure change slope at the current moment according to the first parameter information at the current moment; wherein the first parameter information includes the first intake manifold pressure, the first throttle opening and the first throttle front-to-back pressure ratio; determine the second parameter information at the target moment according to the first parameter information and the reference pressure change slope, and determine the second pressure change slope at the target moment according to the second parameter information; wherein the second parameter information includes the second intake manifold pressure, the second throttle opening and the second throttle front-to-back pressure ratio; determine the target pressure change slope according to the reference pressure change slope, the first pressure change slope and the second pressure change slope, and predict the target intake manifold pressure at the target moment according to the target pressure change slope. The technical solution of the embodiment of the present application is to determine the target pressure change slope to predict the target intake manifold pressure by comprehensively considering the reference pressure change slope and the first pressure change slope and the second pressure change slope calculated at two different moments, thereby improving the prediction accuracy of the intake manifold pressure.

[0018] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a flow chart of an intake manifold pressure prediction method provided according to Embodiment 1 of the present application;

[0021] Figure 2 is a flow chart of an intake manifold pressure prediction method provided according to Embodiment 2 of the present application;

[0022] Figure 3 This is a schematic diagram of the change of intake manifold pressure over time according to the second embodiment of the present application.

[0023] Figure 4 is a structural schematic diagram of an intake manifold pressure prediction device provided according to Embodiment 3 of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of an electronic device for implementing the intake manifold pressure prediction method of an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] Embodiment 1

[0028] Figure 1 A flowchart of an intake manifold pressure prediction method is provided for the first embodiment of the present application. This embodiment is applicable to the case of predicting the pressure of the intake manifold of a vehicle engine. The method can be performed by an intake manifold pressure prediction device. The intake manifold pressure prediction device can be implemented in the form of hardware and / or software. The intake manifold pressure prediction device can be configured in an electronic device. Figure 1 As shown, the method includes:

[0029] S110. Determine a first pressure change slope at a current moment according to first parameter information at a current moment; wherein the first parameter information includes a first intake manifold pressure, a first throttle opening, and a first throttle front-rear pressure ratio.

[0030] Among them, the intake manifold pressure refers to the absolute pressure value of the engine intake manifold. When the engine is working, the intake manifold pressure will be lower than the atmospheric pressure due to the suction effect formed by the downward movement of the intake stroke piston. The throttle opening refers to the opening angle of the engine throttle, which directly controls the engine's intake volume, thereby affecting the engine's operating state. The throttle front and rear pressure ratio refers to the relative relationship between the air pressure before and after the throttle. The current time refers to the calculation time of the engine injection amount.

[0031] In an embodiment of the present application, the first intake manifold pressure, the first throttle opening, the first pre-throttle pressure and the first post-throttle pressure at the current moment can be collected by the vehicle's sensors, and the first pre- and post-throttle pressure ratio can be obtained by calculation, which is used as the first parameter information at the current moment. Thereafter, the first pressure change slope at the current moment is calculated based on the first parameter information at the current moment.

[0032] Optionally, the first pressure change slope at the current moment is determined according to the first parameter information at the current moment, including: determining the first main filling intake flow according to the first intake manifold pressure, and determining the first filling intake flow according to the first throttle opening and the first throttle front-back pressure ratio; based on the ideal gas state equation, determining the first pressure change slope at the current moment according to the difference between the first main filling intake flow and the first filling intake flow.

[0033] Among them, the first main charge intake flow is the engine intake volume calculated by the main charge model in the engine intake control system according to the first intake manifold pressure. The first charge intake flow is the engine intake volume calculated by the secondary charge model in the engine intake control system according to the first throttle opening and the first throttle front-to-back pressure ratio. The ideal gas state equation is used to describe the relationship between pressure, volume, mass and temperature of an ideal gas in equilibrium.

[0034] It can be understood that, taking the intake manifold of the engine as an analysis object, the parameters of the gas inside it follow the ideal gas state equation, that is, Therefore, on the basis of approximately constant temperature and volume, the pressure change slope in the intake manifold can be calculated by the difference between the main charge intake flow and the secondary charge intake flow. Optionally, the first pressure change slope at the current moment is determined according to the difference between the first main charge intake flow and the first charge intake flow, and the calculation formula is as follows:

[0035] ;

[0036] in, Indicates the first pressure change slope at the current moment, Indicates the volume of the engine intake manifold. It represents the difference between the first main charge intake flow and the first charge intake flow. is the ideal gas constant, Indicates the temperature inside the engine intake manifold. Indicates the first main charge air flow rate, Indicates the first filling air flow.

[0037] S120, determining the second parameter information at the target time according to the first parameter information and the reference pressure change slope, and determining the second pressure change slope at the target time according to the second parameter information; wherein the second parameter information includes the second intake manifold pressure, the second throttle opening and the second throttle front-rear pressure ratio.

[0038] The reference pressure change slope is a parameter describing the pressure change in the intake manifold, which can be approximately calculated by the intake manifold pressure difference between two known moments and the time difference between the two moments. The target moment refers to the moment when the engine intake ends, and the embodiment of the present application needs to predict the intake manifold pressure at the current moment.

[0039] In the embodiment of the present application, the second parameter information at the target moment cannot be accurately determined at the current moment, and the second parameter information at the target moment can only be estimated through the first parameter information and the reference pressure change slope, and the second pressure change slope at the target moment is calculated based on this, and the calculation method is the same as the calculation method of the first pressure change slope.

[0040] Optionally, second parameter information at the target time is determined based on the first parameter information and the baseline pressure change slope, including: estimating the second intake manifold pressure based on the baseline pressure change slope and the first intake manifold pressure, estimating the second throttle front-to-back pressure ratio based on the baseline pressure change slope and the first throttle front-to-back pressure ratio; determining the target value of the first throttle opening, and delaying the target value of the first throttle opening to the target time to output it as the second throttle opening.

[0041] The first throttle opening refers to the actual value of the throttle opening at the current moment, and the target value of the first throttle opening is the theoretical value of the throttle opening calculated at the current moment, and the theoretical value is determined by the first parameter information and the vehicle state at the current moment. Specifically, the air mass flow that needs to flow through the throttle can be determined based on the current torque demand and engine speed of the vehicle, and then the target value of the first throttle opening can be determined based on the air mass flow that needs to flow through the throttle and the pressure difference before and after the first throttle.

[0042] In the embodiment of the present application, the reference pressure change slope describes the process of linear change of the pressure in the intake manifold. Therefore, the second intake manifold pressure in the second parameter information can be estimated based on the first intake manifold pressure at the current moment and the linear relationship represented by the reference pressure change slope. The second throttle front-to-back pressure ratio in the second parameter information can be estimated based on the first throttle front-to-back pressure ratio at the current moment and the linear relationship represented by the reference pressure change slope. The second throttle opening in the second parameter information uses the target value of the first throttle opening after a preset time delay, wherein the preset time is related to the engine speed and can be calibrated based on multiple experimental data.

[0043] Optionally, the second parameter information determines a second pressure change slope at the target time, and the calculation formula is as follows:

[0044] ;

[0045] in, Indicates the second pressure change slope at the target time, Indicates the volume of the engine intake manifold. It represents the difference between the second main charge air flow and the second charge air flow. is the ideal gas constant, Indicates the temperature inside the engine intake manifold. Indicates the second main charge air flow rate, Indicates the second filling air flow.

[0046] S130, determining a target pressure change slope according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope, and predicting a target intake manifold pressure at a target time according to the target pressure change slope.

[0047] In the embodiment of the present application, the reference pressure change slope, the first pressure change slope and the second pressure change slope are all used to reflect the pressure change in the engine intake manifold. In order to improve the accuracy of the prediction of the intake manifold pressure at the target time, the reference pressure change slope, the first pressure change slope and the second pressure change slope can be comprehensively considered to determine the target pressure change slope. Optionally, the target pressure change slope is determined according to the reference pressure change slope, the first pressure change slope and the second pressure change slope, including: after assigning different weights to the reference pressure change slope, the first pressure change slope and the second pressure change slope, the reference pressure change slope, the first pressure change slope and the second pressure change slope are weightedly calculated to obtain the target pressure change slope. Among them, the size of the weight depends on the reliability of each pressure change slope and the correlation with the target prediction. After that, the target intake manifold pressure at the target time can be predicted according to the target pressure change slope.

[0048] The technical solution of the embodiment of the present application determines the first pressure change slope at the current moment according to the first parameter information at the current moment; wherein the first parameter information includes the first intake manifold pressure, the first throttle opening and the first throttle front-to-back pressure ratio; determines the second parameter information at the target moment according to the first parameter information and the reference pressure change slope, and determines the second pressure change slope at the target moment according to the second parameter information; wherein the second parameter information includes the second intake manifold pressure, the second throttle opening and the second throttle front-to-back pressure ratio; determines the target pressure change slope according to the reference pressure change slope, the first pressure change slope and the second pressure change slope, and predicts the target intake manifold pressure at the target moment according to the target pressure change slope. The technical solution of the embodiment of the present application determines the target pressure change slope to predict the target intake manifold pressure by comprehensively considering the reference pressure change slope and the first pressure change slope and the second pressure change slope calculated at two different moments, thereby improving the prediction accuracy of the intake manifold pressure.

[0049] Embodiment 2

[0050] Figure 2 This is a flow chart of an intake manifold pressure prediction method provided in the second embodiment of the present application. The present embodiment is optimized based on the above embodiment. For solutions not described in detail in the present embodiment, please refer to the above embodiment. Figure 2 As shown, the method includes:

[0051] S210. Determine a first pressure change slope at a current moment according to first parameter information at a current moment.

[0052] S220: Obtain the historical intake manifold pressure at a moment before the current moment.

[0053] In the embodiment of the present application, the historical intake manifold pressure at a moment before the current moment can be obtained through the vehicle's sensor data recorder or a customized data acquisition system.

[0054] S230: Determine a reference pressure change slope according to a difference between the first intake manifold pressure and the historical intake manifold pressure, and a time difference between a current moment and a previous moment.

[0055] In the embodiment of the present application, the ratio of the difference between the first intake manifold pressure and the historical intake manifold pressure to the time difference between the current moment and the previous moment is the reference pressure change slope.

[0056] For example, Figure 3 A schematic diagram of the change of intake manifold pressure over time is shown. As shown in the figure, the crankshaft angle on the horizontal axis represents time. Represents the current moment, represents the moment before the current moment, the estimated point represents the target moment, and the vertical axis represents the machine manifold pressure. The reference pressure change slope is determined according to the difference between the first intake manifold pressure and the historical intake manifold pressure, and the time difference between the current moment and the previous moment. The calculation formula is as follows:

[0057] ;

[0058] in, Indicates the slope of the base pressure change, represents the first intake manifold pressure, represents the historical intake manifold pressure, Indicates the current moment, Indicates the moment before the current moment.

[0059] S240: Determine the second parameter information at the target time according to the first parameter information and the reference pressure change slope, and determine the second pressure change slope at the target time according to the second parameter information.

[0060] S250: Determine a target pressure change slope according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope, and predict a target intake manifold pressure at a target time according to the target pressure change slope.

[0061] In the embodiment of the present application, in order to improve the accuracy of the prediction of the intake manifold pressure at the target time, the reference pressure change slope, the first pressure change slope and the second pressure change slope can be comprehensively considered to determine the target pressure change slope.

[0062] Optionally, a target pressure change slope is determined based on the baseline pressure change slope, the first pressure change slope and the second pressure change slope, and the intake manifold pressure at the target moment is predicted based on the target pressure change slope, including: taking the baseline pressure change slope as a reference, correcting the baseline pressure change slope based on the first pressure change slope and the second pressure change slope to obtain the target pressure change slope; predicting the intake manifold pressure at the target moment based on the target pressure change slope.

[0063] In the embodiment of the present application, when determining the target pressure change slope by comprehensively considering the reference pressure change slope, the first pressure change slope and the second pressure change slope, the reference pressure change slope can be used as a reference, and the reference pressure change slope can be corrected according to the first pressure change slope and the second pressure change slope to obtain the target pressure change slope. Optionally, the calculation formula of the target pressure change slope is as follows:

[0064] ;

[0065] in, Indicates the target pressure change slope, Indicates the slope of the base pressure change, represents the first pressure change slope, represents the second pressure change slope, To ensure calibrated quantification, adjustments can be made based on bench test results.

[0066] Optionally, the intake manifold pressure at a target moment is predicted based on the target pressure change slope, including: determining a pressure correction amount at the target moment relative to the current moment based on the target pressure change slope; and determining the target intake manifold pressure at the target moment based on the pressure correction amount and the first intake manifold pressure.

[0067] In the embodiment of the present application, the pressure correction amount at the target time relative to the current time can be determined based on the target pressure change slope and the time difference between the target time and the current time, and the target intake manifold pressure at the target time can be determined based on the pressure correction amount and the first intake manifold pressure. Optionally, the calculation formulas of the pressure correction amount and the target intake manifold pressure are as follows:

[0068] ;

[0069] ;

[0070] in, Indicates the pressure correction amount, Indicates the target pressure change slope, Indicates the target time, Indicates the current moment, represents the target intake manifold pressure, Indicates the first intake manifold pressure.

[0071] S260: Determine a fuel injection correction index according to the target intake manifold pressure and the first intake manifold pressure, and correct the fuel injection amount of the engine based on the fuel injection correction index.

[0072] Among them, the injection correction index is also called the fuel correction value, which is used to correct the engine injection amount to ensure that the engine can obtain the optimal mixture concentration under various operating conditions, thereby achieving better combustion efficiency.

[0073] In the embodiment of the present application, after the target intake manifold pressure is determined, the fuel injection correction index can be determined according to the target intake manifold pressure and the first intake manifold pressure, so as to correct the fuel injection amount of the engine based on the fuel injection correction index. Optionally, the fuel injection correction index is determined according to the target intake manifold pressure and the first intake manifold pressure, and its calculation formula is as follows:

[0074] ;

[0075] in, Indicates the injection correction index, represents the target intake manifold pressure, Indicates the first intake manifold pressure.

[0076] The technical solution of the embodiment of the present application is to determine the first pressure change slope at the current moment according to the first parameter information at the current moment; obtain the historical intake manifold pressure at the previous moment of the current moment; determine the reference pressure change slope according to the difference between the first intake manifold pressure and the historical intake manifold pressure, and the time difference between the current moment and the previous moment; determine the second parameter information at the target moment according to the first parameter information and the reference pressure change slope, and determine the second pressure change slope at the target moment according to the second parameter information; determine the target pressure change slope according to the reference pressure change slope, the first pressure change slope and the second pressure change slope, and predict the target intake manifold pressure at the target moment according to the target pressure change slope; determine the injection correction index according to the target intake manifold pressure and the first intake manifold pressure, and correct the injection amount of the engine based on the injection correction index. The technical solution of the embodiment of the present application determines the target pressure change slope to predict the target intake manifold pressure by comprehensively considering the reference pressure change slope and the first pressure change slope and the second pressure change slope calculated at two different times, thereby improving the prediction accuracy of the intake manifold pressure, and further improving the accuracy of the injection quantity correction, ensuring the accuracy of the air-fuel ratio of the engine under transient conditions, and achieving stable output of the engine torque.

[0077] Embodiment 3

[0078] Figure 4 This is a schematic diagram of the structure of an intake manifold pressure prediction device provided in Example 3 of the present application. Figure 4 As shown, the device comprises:

[0079] A first pressure change slope determination module 310, configured to determine a first pressure change slope at a current moment according to first parameter information at a current moment; wherein the first parameter information includes a first intake manifold pressure, a first throttle opening, and a first throttle front-rear pressure ratio;

[0080] A second pressure change slope determination module 320, configured to determine second parameter information at a target time according to the first parameter information and a reference pressure change slope, and determine a second pressure change slope at the target time according to the second parameter information; wherein the second parameter information includes a second intake manifold pressure, a second throttle opening, and a second throttle front-rear pressure ratio;

[0081] The target intake manifold pressure prediction module 330 is used to determine a target pressure change slope according to the reference pressure change slope, the first pressure change slope and the second pressure change slope, and predict the target intake manifold pressure at a target time according to the target pressure change slope.

[0082] Optionally, the first pressure change slope determination module 310 includes:

[0083] An intake flow determination unit, used to determine a first main charge intake flow according to a first intake manifold pressure, and to determine a first charge intake flow according to a first throttle opening and a first throttle front-rear pressure ratio;

[0084] The first pressure change slope determining unit is used to determine the first pressure change slope at a current moment according to the difference between the first main filling air flow rate and the first filling air flow rate based on an ideal gas state equation.

[0085] Optionally, the device further comprises:

[0086] A historical intake manifold pressure acquisition module is used to acquire the historical intake manifold pressure at a moment before the current moment;

[0087] The reference pressure change slope determination module is used to determine the reference pressure change slope according to the difference between the first intake manifold pressure and the historical intake manifold pressure, and the time difference between a current moment and a previous moment.

[0088] Optionally, the second pressure change slope determination module 320 includes:

[0089] a second parameter information estimating unit, configured to estimate the second intake manifold pressure according to the reference pressure variation slope and the first intake manifold pressure, and to estimate the second throttle front-to-back pressure ratio according to the reference pressure variation slope and the first throttle front-to-back pressure ratio;

[0090] The second throttle opening determination unit is used to determine a target value of the first throttle opening, and delay the target value of the first throttle opening to the target time and output it as a second throttle opening.

[0091] Optionally, the target intake manifold pressure prediction module 330 includes:

[0092] a target pressure change slope determination unit, configured to take the reference pressure change slope as a reference, and to correct the reference pressure change slope according to the first pressure change slope and the second pressure change slope to obtain a target pressure change slope;

[0093] The target intake manifold pressure prediction unit is used to predict the intake manifold pressure at a target time according to the target pressure change slope.

[0094] Optionally, the target intake manifold pressure prediction unit comprises:

[0095] A pressure correction amount determination subunit, used to determine the pressure correction amount at a target time relative to a current time according to the target pressure change slope;

[0096] The target intake manifold pressure determination subunit is used to determine the target intake manifold pressure at a target time according to the pressure correction amount and the first intake manifold pressure.

[0097] The intake manifold pressure prediction device provided in the embodiment of the present application can execute the intake manifold pressure prediction method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0098] Embodiment 4

[0099] Figure 5 A schematic diagram of an electronic device 10 that can be used to implement an embodiment of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0100] like Figure 5 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0101] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0102] The processor 11 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the intake manifold pressure prediction method.

[0103] In some embodiments, the intake manifold pressure prediction method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the intake manifold pressure prediction method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the intake manifold pressure prediction method in any other appropriate manner (e.g., by means of firmware).

[0104] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0105] The computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer programs are executed by the processor, the functions / operations specified in the flow charts and / or block diagrams are implemented. The computer programs may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0106] In the context of the present application, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0107] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0108] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0109] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0110] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document is not limited here.

[0111] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of this application.

Claims

1. A method for predicting intake manifold pressure, characterized in that: The method comprises: Determine the first pressure change slope at the current moment according to the first parameter information at the current moment; wherein the first parameter information includes the first intake manifold pressure, the first throttle opening and the first throttle front-to-rear pressure ratio; Determine the second parameter information at the target time according to the first parameter information and the reference pressure change slope, and determine the second pressure change slope at the target time according to the second parameter information; wherein the second parameter information includes the second intake manifold pressure, the second throttle opening and the second throttle front-rear pressure ratio; determining a target pressure change slope according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope, and predicting a target intake manifold pressure at a target time according to the target pressure change slope; Determining the first pressure change slope at the current moment according to the first parameter information at the current moment includes: Determine the first main charge intake flow rate according to the first intake manifold pressure, and determine the first charge intake flow rate according to the first throttle opening and the first throttle front-to-rear pressure ratio; Based on the ideal gas state equation, determining a first pressure change slope at a current moment according to a difference between the first main charging air flow rate and the first charging air flow rate; Determining second parameter information at a target time according to the first parameter information and the reference pressure change slope includes: estimating the second intake manifold pressure according to the reference pressure variation slope and the first intake manifold pressure, and estimating the second throttle front-to-back pressure ratio according to the reference pressure variation slope and the first throttle front-to-back pressure ratio; Determining a target value of the first throttle opening, and delaying the target value of the first throttle opening to the target time and outputting it as a second throttle opening; The calculation method for determining the second pressure change slope at the target moment according to the second parameter information is the same as the calculation method for determining the first pressure change slope at the current moment according to the first parameter information at the current moment; Determining the target pressure change slope according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope includes: After assigning different weights to the reference pressure change slope, the first pressure change slope and the second pressure change slope, weighted calculation is performed on the reference pressure change slope, the first pressure change slope and the second pressure change slope to obtain the target pressure change slope.

2. The method according to claim 1, characterized in that Before determining the second parameter information at the target time according to the first parameter information and the reference pressure change slope, the method further includes: Get the historical intake manifold pressure at the moment before the current moment; The reference pressure change slope is determined according to a difference between the first intake manifold pressure and the historical intake manifold pressure, and a time difference between a current moment and a previous moment.

3. The method according to claim 1, characterized in that Determining a target pressure change slope according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope, and predicting the intake manifold pressure at a target time according to the target pressure change slope, including: Taking the reference pressure change slope as a reference, the reference pressure change slope is corrected according to the first pressure change slope and the second pressure change slope to obtain a target pressure change slope; The intake manifold pressure at the target time is predicted according to the target pressure change slope.

4. The method according to claim 3, characterized in that Predicting the intake manifold pressure at the target time according to the target pressure change slope includes: Determining a pressure correction amount at a target time relative to a current time according to the target pressure change slope; A target intake manifold pressure at a target time is determined based on the pressure correction amount and the first intake manifold pressure.

5. The method according to claim 1, characterized in that After predicting the intake manifold pressure at the target time according to the target pressure change slope, the method further includes: An injection correction index is determined according to the target intake manifold pressure and the first intake manifold pressure, and the injection amount of the engine is corrected based on the injection correction index.

6. An intake manifold pressure prediction device, characterized in that: The device comprises: A first pressure change slope determination module, configured to determine a first pressure change slope at a current moment according to first parameter information at a current moment; wherein the first parameter information includes a first intake manifold pressure, a first throttle opening, and a first throttle front-rear pressure ratio; a second pressure change slope determination module, configured to determine second parameter information at a target time according to the first parameter information and a reference pressure change slope, and determine a second pressure change slope at the target time according to the second parameter information; wherein the second parameter information includes a second intake manifold pressure, a second throttle opening, and a second throttle front-rear pressure ratio; a target intake manifold pressure prediction module, configured to determine a target pressure change slope according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope, and to predict a target intake manifold pressure at a target time according to the target pressure change slope; The first pressure change slope determination module includes: An intake flow determination unit, used to determine a first main charge intake flow according to a first intake manifold pressure, and to determine a first charge intake flow according to a first throttle opening and a first throttle front-rear pressure ratio; A first pressure change slope determining unit, configured to determine a first pressure change slope at a current moment according to a difference between the first main charging air flow rate and the first charging air flow rate based on an ideal gas state equation; The second pressure change slope determination module includes: a second parameter information estimating unit, configured to estimate the second intake manifold pressure according to the reference pressure variation slope and the first intake manifold pressure, and to estimate the second throttle front-to-back pressure ratio according to the reference pressure variation slope and the first throttle front-to-back pressure ratio; a second throttle opening determination unit, configured to determine a target value of the first throttle opening, and delay the target value of the first throttle opening to the target time and output it as a second throttle opening; The calculation method for determining the second pressure change slope at the target moment according to the second parameter information is the same as the calculation method for determining the first pressure change slope at the current moment according to the first parameter information at the current moment; Determining the target pressure change slope according to the reference pressure change slope, the first pressure change slope, and the second pressure change slope includes: After assigning different weights to the reference pressure change slope, the first pressure change slope and the second pressure change slope, weighted calculation is performed on the reference pressure change slope, the first pressure change slope and the second pressure change slope to obtain the target pressure change slope.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the intake manifold pressure prediction method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the intake manifold pressure prediction method according to any one of claims 1 to 5 when executed.

Images