CN114962026A - Method and device for correcting set value of intake air flow, electronic device, and storage medium - Google Patents
Method and device for correcting set value of intake air flow, electronic device, and storage medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The application provides a method and a device for correcting a set value of an air inflow, electronic equipment and a storage medium, and relates to the field of mechanical control; the method comprises the following steps: after the working condition information of the engine is determined to meet the set conditions in the first set time period, acquiring an actual intake pressure value in the second set time period; determining a predicted intake pressure value in a second set time period according to the working condition information; determining an intake flow correction coefficient according to the actual intake pressure value and the predicted intake pressure value; and correcting the air intake flow set value corresponding to the working condition information according to the air intake flow correction coefficient to obtain a target air intake flow value, and adjusting the opening degree of the exhaust gas recirculation valve according to the target air intake flow value. The method and the device have the advantages that the target intake flow value is obtained by correcting the intake flow set value based on the intake flow correction coefficient, so that the problem that the intake flow value is influenced by the consistency of the supercharger is solved, and the emission adaptability of the exhaust gas recirculation system is improved.
Description
Technical Field
The application relates to the field of mechanical control, in particular to a method and a device for correcting a set value of an intake air flow, electronic equipment and a storage medium.
Background
In order to reduce environmental pollution, the current off-road four-stage diesel engines are provided with aftertreatment devices such as a Diesel Particulate Filter (DPF), a Selective Catalytic Reduction (SCR) and the like, and the requirements of the thermal management and the accurate control of the emission of the engines are met. For an engine adopting an AFS (Air Flow Sensor) intake Flow closed loop to control an Exhaust Gas Recirculation (EGR) route of emission, the AFS intake Flow needs to be determined according to an intake Flow set value, so that the intake Flow set value is very sensitive to the robustness of emission.
At present, because the intake flow set value is determined based on a preset intake flow map, the intake flow set value is the same for different superchargers under the same working condition information; however, due to the consistency problem of the supercharger, there may be a deviation between the AFS intake flow under the condition information and the intake flow set value corresponding to the condition information, so that the EGR controller needs to adjust the exhaust flow to ensure the AFS intake flow to be closed-loop, thereby causing the EGR rate to change, and causing the exhaust of the EGR system to be poor.
Disclosure of Invention
In order to solve the existing technical problems, embodiments of the present application provide a method and an apparatus for correcting an intake air flow set value, an electronic device, and a storage medium, so as to improve exhaust adaptability of an exhaust gas recirculation system.
In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a method for correcting an intake air flow set value, where the method includes:
after the working condition information of the engine is determined to meet the set conditions in the first set time period, acquiring an actual intake pressure value in the second set time period; the actual air inlet pressure value is used for representing an air inlet pressure value actually generated under the working condition information;
determining a predicted intake pressure value in the second set time period according to the working condition information; the predicted inlet pressure value is used for representing an inlet pressure value predicted to be generated under the working condition information;
determining an intake flow correction coefficient according to the actual intake pressure value and the predicted intake pressure value;
and correcting the air intake flow set value corresponding to the working condition information according to the air intake flow correction coefficient to obtain a target air intake flow value, and adjusting the opening degree of the exhaust gas recirculation valve according to the target air intake flow value.
According to the method and the device, after the working condition information of the engine meets the set condition in the first set time period, the intake flow correction coefficient is determined based on the actual intake pressure value in the second set time period and the predicted intake pressure value in the second set time period, so that the intake flow set value corresponding to the working condition information can be corrected according to the intake flow correction coefficient, the influence of the supercharger consistency on the intake flow is avoided, the self-adaptive correction of the supercharger consistency is realized, and the exhaust adaptability of the EGR system is improved.
In an optional implementation manner, the determining the predicted intake pressure value within the second set time period according to the operating condition information includes:
determining working condition information of the engine in the second set time period;
and determining a pressure value corresponding to the working condition information of the engine in the second set time period based on a preset intake pressure map, and taking the pressure value as a predicted intake pressure value in the second set time period.
In an optional implementation, the determining an intake air flow correction factor according to the actual intake air pressure value and the predicted intake air pressure value includes:
performing integral calculation on the actual intake pressure value in the second set time period to obtain an actual pressure integral value;
performing integral calculation on the estimated air inlet pressure value in the second set time period to obtain an estimated pressure integral value;
the intake flow rate correction coefficient is determined based on the actual pressure integrated value and the predicted pressure integrated value.
According to the embodiment of the application, the actual air inlet pressure value in the second set time period is subjected to integral calculation to obtain the actual pressure integral value, and the predicted air inlet pressure value in the second set time period is subjected to integral calculation to obtain the predicted pressure integral value; the actual pressure integrated value and the predicted pressure integrated value can accurately describe the intake pressure generated by the supercharger in the second set time period, so that the intake flow correction coefficient can be accurately determined according to the actual pressure integrated value and the predicted pressure integrated value.
An optional implementation wherein the determining the intake flow rate correction coefficient based on the actual pressure integrated value and the predicted pressure integrated value includes:
the ratio of the actual pressure integrated value and the predicted pressure integrated value is taken as the intake flow correction coefficient.
In an optional embodiment, the operating condition information includes engine speed and torque; the setting conditions include:
the engine rotating speeds are all larger than a rotating speed set threshold, and the torques are all larger than a torque set threshold.
In a second aspect, an embodiment of the present application provides a correction device for an intake air flow set value, including:
the acquiring unit is used for acquiring an actual intake pressure value in a second set time period after the condition information of the engine is determined to meet the set conditions in the first set time period; the actual air inlet pressure value is used for representing an air inlet pressure value actually generated under the working condition information;
the first determining unit is used for determining a predicted air inlet pressure value in the second set time period according to the working condition information; the predicted inlet pressure value is used for representing an inlet pressure value predicted to be generated under the working condition information;
the second determining unit is used for determining an intake air flow correction coefficient according to the actual intake air pressure value and the predicted intake air pressure value;
and the correction unit is used for correcting the air inlet flow set value corresponding to the working condition information according to the air inlet flow correction coefficient to obtain a target air inlet flow value, and adjusting the opening of the exhaust gas recirculation valve according to the target air inlet flow value.
An optional implementation manner is that the first determining unit is specifically configured to:
determining working condition information of the engine in the second set time period;
and determining a pressure value corresponding to the working condition information of the engine in the second set time period based on a preset intake pressure map, and taking the pressure value as a predicted intake pressure value in the second set time period.
An optional implementation manner is that the second determining unit is specifically configured to:
performing integral calculation on the actual intake pressure value in the second set time period to obtain an actual pressure integral value;
performing integral calculation on the estimated air inlet pressure value in the second set time period to obtain an estimated pressure integral value;
the intake flow rate correction coefficient is determined based on the actual pressure integrated value and the predicted pressure integrated value.
An optional implementation manner is that the second determining unit is specifically configured to:
the ratio of the actual pressure integrated value and the predicted pressure integrated value is taken as the intake flow correction coefficient.
In an optional embodiment, the operating condition information includes engine speed and torque; the setting conditions include:
the engine rotating speeds are all larger than a rotating speed set threshold, and the torques are all larger than a torque set threshold.
In a third aspect, an embodiment of the present application provides an electronic device, including a memory and a processor, the memory having stored thereon a computer program executable on the processor, the computer program, when executed by the processor, causing the processor to implement the method for correcting an intake air flow set value of any one of the first aspects described above.
In a fourth aspect, embodiments of the present application provide a computer storage medium having stored therein computer program instructions that, when run on a computer, cause the computer to perform the method of correcting an intake air flow set value of any of the first aspects described above.
For technical effects brought by any one implementation manner in the second aspect to the fourth aspect, reference may be made to technical effects brought by a corresponding implementation manner in the first aspect, and details are not described here.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for correcting an intake air flow set value according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a complete flow chart of a method for correcting a set value of an intake air flow according to an embodiment of the present disclosure;
FIG. 3 is a block diagram showing a configuration of an intake air flow set value correction device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present disclosure better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
Some terms appearing herein are explained below:
(1) exhaust Gas Recirculation (EGR): exhaust gas recirculation refers to the recirculation of a portion of the exhaust gases from the engine back into the intake manifold and back into the cylinders along with fresh mixture.
(2) EGR rate: refers to the ratio of the recirculated exhaust gas flow to the total intake air flow drawn into the cylinder; the formula is as follows: EGR rate is waste flow/(AFS intake flow + waste flow).
At present, because the intake flow set value is determined based on a preset intake flow map, the intake flow set value is the same for different superchargers under the same working condition information; however, due to the consistency problem of the supercharger, there may be a deviation between the AFS intake flow under the condition information and the intake flow set value corresponding to the condition information, so that the EGR controller needs to adjust the exhaust flow to ensure the AFS intake flow to be closed-loop, thereby causing the EGR rate to change, and causing the exhaust of the EGR system to be poor.
In view of the above problems, as shown in fig. 1, an embodiment of the present application provides a method for correcting an intake air flow set value, including the steps of:
and step S101, after the condition information of the engine is determined to meet the set conditions in the first set time period, acquiring an actual intake pressure value in the second set time period.
It should be noted that the actual intake pressure value is used to represent the intake pressure value actually generated under the condition information.
According to the embodiment of the application, when the engine is started for the first time, the working condition information of the engine is obtained in real time, and whether the working condition information of the engine meets the set conditions within the first set time period is determined; and acquiring an actual intake pressure value in a second set time period after the condition information is determined to meet the set conditions in the first set time period.
In the concrete implementation, the actual intake pressure value in the second set time period can be obtained directly according to the pressure sensor arranged behind the intercooler and in front of the intake manifold.
It should be noted that the actual intake pressure values obtained in the second set time period in the embodiment of the present application are infinite.
In some embodiments, operating condition information includes, but is not limited to: engine speed and torque.
In some embodiments, the set condition may be:
the engine rotating speeds are all larger than a rotating speed set threshold value, and the torques are all larger than a torque set threshold value.
And step S102, determining a predicted intake pressure value in a second set time period according to the working condition information.
It should be noted that the predicted intake pressure value is used to represent the intake pressure value predicted to be generated under the condition information.
The working condition information of the engine in the second set time period is determined, the pressure value corresponding to the working condition information in the second set time period is determined based on the preset intake pressure map, and the pressure value is used as the predicted intake pressure value in the second set time period.
It should be noted that the number of the predicted intake pressure values in the second period is infinite.
And step S103, determining an intake air flow correction coefficient according to the actual intake air pressure value and the predicted intake air pressure value.
And step S104, correcting the air intake flow set value corresponding to the working condition information according to the air intake flow correction coefficient to obtain a target air intake flow value, and adjusting the opening degree of the exhaust gas recirculation valve according to the target air intake flow value.
According to the method and the device, after the working condition information of the engine meets the set condition in the first set time period, the intake flow correction coefficient is determined based on the actual intake pressure value in the second set time period and the predicted intake pressure value in the second set time period, so that the intake flow set value corresponding to the working condition information can be corrected according to the intake flow correction coefficient, the influence of the supercharger consistency on the intake flow is avoided, the self-adaptive correction of the supercharger consistency is realized, and the exhaust adaptability of the EGR system is improved.
In some embodiments, after determining that the operating condition information of the engine meets the set condition within the first set time period, the embodiment of the application obtains the actual intake pressure value within the second set time period, and determines the predicted intake pressure value within the second set time period according to the operating condition information within the second set time period.
In specific implementation, the method and the device for determining the actual intake pressure value of the engine in the second set time period obtain the rotating speed and the torque of the engine in real time, determine that the rotating speed of the engine is greater than a rotating speed set threshold in the first set time period and the torque is greater than a torque set threshold, and determine the predicted intake pressure value in the second set time period according to the rotating speed and the torque of the engine in the second set time period.
In some embodiments, the present application embodiment obtains an engine speed and a torque within a second set time period, takes the engine speed and the torque as pressure coordinates of a predicted intake pressure, determines a pressure value corresponding to the pressure coordinates of the predicted intake pressure based on a preset intake pressure map, and takes the determined pressure value as the predicted intake pressure value.
For example, the rotation speed is set to 1500 revolutions, the torque is set to 500N, the first set time period is 10S, and the second set time period is 60S; the method and the device for determining the actual intake pressure value of the engine have the advantages that the rotating speed and the torque of the engine are obtained in real time, after the fact that the rotating speed of the engine is greater than 1500 revolutions in 10S and the torque is greater than 500N in 10S is determined, the actual intake pressure value in 60S is obtained, and the corresponding predicted intake pressure value in the preset intake pressure map is determined according to the rotating speed and the torque of the engine in 60S.
In some embodiments, the intake air flow correction coefficient is determined according to the obtained actual intake air pressure value and the predicted intake air pressure value in the second time period.
In specific implementation, the embodiment of the application performs integral calculation on the actual intake pressure value in the second set time period to obtain an actual pressure integral value; performing integral calculation on the estimated air inlet pressure value in the second set time period to obtain an estimated pressure integral value; then, an intake flow rate correction coefficient is determined based on the actual pressure integrated value and the predicted pressure integrated value.
In some embodiments, the present embodiment uses the ratio of the actual pressure integrated value to the predicted pressure integrated value as the intake air flow rate correction coefficient.
For example, the second set time period is 10S; according to the embodiment of the application, after the working condition information of the engine is determined to meet the set condition in the first set time period, integral calculation is carried out on the actual intake pressure value obtained in the subsequent 10S, and the actual pressure integral value is obtained; determining a predicted intake pressure value in the subsequent 10S according to the working condition information of the engine acquired in the subsequent 10S, and performing integral calculation on the predicted intake pressure value in the subsequent 10S to obtain a predicted pressure integral value; then, the present embodiment takes the ratio of the actual pressure integrated value to the predicted pressure integrated value as the intake air flow rate correction coefficient.
In some embodiments, after the intake flow correction coefficient is determined, the intake flow set value corresponding to the working condition information is corrected according to the intake flow correction coefficient to obtain a target flow value, and the opening of the exhaust gas recirculation valve is adjusted according to the target intake flow value.
In specific implementation, after the intake flow set value is determined according to the current working condition information of the engine, the intake flow set value is corrected according to the intake flow correction coefficient, so that the difference of the intake flow caused by the uniformity of the supercharger is solved.
In some embodiments, after determining the current operating condition information of the engine, the present application embodiment determines an intake flow value corresponding to the current operating condition information based on a preset intake flow map, and uses the intake flow value as an intake flow set value.
In specific implementation, after the rotating speed and the torque of the engine are obtained, the circulating oil quantity is determined according to the obtained torque; then, taking the rotating speed of the engine and the circulating oil mass as flow coordinates of the air inflow; and determining a flow value corresponding to the flow coordinate of the intake flow based on a preset intake flow map, and taking the determined flow value as an intake flow set value.
According to the embodiment of the application, after the set value of the air inflow is determined, the set value of the air inflow is corrected according to the correction coefficient of the air inflow, and the target air inflow value is obtained.
In some embodiments, according to the determined intake flow correction coefficient, all subsequently determined intake flow set values need to be corrected, so that self-adaptive correction of the supercharger consistency is achieved, and the subsequent emission and smoke intensity of the EGR system are guaranteed to be within the limit values.
After the target intake flow value is obtained, the opening degree of the exhaust gas recirculation valve is adjusted according to the target intake flow value, so that the AFS intake flow meets the intake flow requirement of the intake flow system, the stability of the EGR rate is ensured, and the follow-up emission and smoke intensity of the EGR system are ensured to be within the limit value.
As shown in fig. 2, the present embodiment provides a complete flow chart of a method for correcting an intake air flow set value, which includes the following steps:
step S201, obtaining the working condition information of the engine.
It should be noted that the operating condition information includes engine speed and torque.
Step S202, determining whether the working condition information meets the set condition within a first set time period; if yes, executing steps S203 and S205; if not, step S201 is executed.
In some embodiments, the setting conditions in the present application include:
the engine rotating speeds are all larger than a rotating speed set threshold value, and the torques are all larger than a torque set threshold value.
In step S203, the actual intake pressure value in the second set time period is acquired.
It should be noted that the actual intake pressure value is used to represent the intake pressure value actually generated under the condition information.
And step S204, carrying out integral calculation on the actual intake pressure value in the second set time period to obtain an actual pressure integral value.
And step S205, determining the working condition information of the engine in the second set time period.
And step S206, determining a pressure value corresponding to the working condition information of the engine in the second set time period based on a preset intake pressure map, and taking the pressure value as a predicted intake pressure value in the second set time period.
And step S207, performing integral calculation on the expected intake pressure value in the second set time period to obtain an expected pressure integral value.
In step S208, the ratio of the actual pressure integrated value to the predicted pressure integrated value is used as an intake flow rate correction coefficient.
And S209, correcting the air inflow set value corresponding to the working condition information according to the air inflow correction coefficient to obtain a target air inflow value.
And step S210, adjusting the opening of the exhaust gas recirculation valve according to the target intake air flow value.
Based on the same inventive concept, the embodiment of the present application further provides a device for correcting the set value of the intake air flow, and as the principle of solving the problem of the device is similar to the method for correcting the set value of the intake air flow in the embodiment of the present application, the implementation of the device can refer to the implementation of the method, and repeated parts are not described again.
As shown in fig. 3, an embodiment of the present application provides a correction device for an intake air flow set value, including:
the acquiring unit is used for acquiring an actual intake pressure value in a second set time period after the condition information of the engine is determined to meet the set conditions in the first set time period; the actual air inlet pressure value is used for representing an air inlet pressure value actually generated under the working condition information;
the first determining unit is used for determining a predicted intake pressure value in a second set time period according to the working condition information; the predicted inlet pressure value is used for representing an inlet pressure value predicted to be generated under the working condition information;
the second determining unit is used for determining an intake flow correction coefficient according to the actual intake pressure value and the predicted intake pressure value;
and the correcting unit is used for correcting the air intake flow set value corresponding to the working condition information according to the air intake flow correction coefficient to obtain a target air intake flow value, and adjusting the opening degree of the exhaust gas recirculation valve according to the target air intake flow value.
An optional implementation manner is that the first determining unit is specifically configured to:
determining working condition information of the engine within a second set time period;
and determining a pressure value corresponding to the working condition information of the engine in the second set time period based on a preset intake pressure map, and taking the pressure value as a predicted intake pressure value in the second set time period.
An optional implementation manner is that the second determining unit is specifically configured to:
performing integral calculation on the actual intake pressure value in the second set time period to obtain an actual pressure integral value;
performing integral calculation on the estimated air inlet pressure value in the second set time period to obtain an estimated pressure integral value;
an intake flow rate correction coefficient is determined based on the actual pressure integrated value and the predicted pressure integrated value.
An optional implementation manner is that the second determining unit is specifically configured to:
the ratio of the actual pressure integrated value and the predicted pressure integrated value is taken as an intake flow rate correction coefficient.
In an alternative embodiment, the operating condition information includes engine speed and torque; the setting conditions include:
the engine rotating speeds are all larger than a rotating speed set threshold value, and the torques are all larger than a torque set threshold value.
The embodiment of the present application provides an electronic apparatus based on the same inventive concept as the method of correcting the intake air flow set value shown in fig. 1. As shown in fig. 4, for convenience of explanation, only the parts related to the embodiments of the present application are shown, and details of the technology are not disclosed, and reference may be made to the parts of the embodiments of the method of the present application. The electronic device may be a waste recycling system controller.
The device comprises at least a memory for storing data and a processor for data processing. The processor for data Processing may be implemented by a microprocessor, a CPU, a GPU (Graphics Processing Unit), a DSP, or an FPGA when executing Processing. As for the memory, there are stored in the memory operating instructions, which may be computer-executable codes, by which the respective steps in the flow of the intake air flow set value correction method of the embodiment of the present application described above are realized.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure; as shown in fig. 4, the electronic device in the embodiment of the present application includes: the device comprises a memory, a communication module and one or more processors.
A memory for storing a computer program for execution by the processor. The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system, programs needed by running the instant messaging function and the like; the storage data area can store various instant messaging information, operation instruction sets and the like.
A processor, which may include one or more Central Processing Units (CPUs), or be a digital processing unit, etc. And the processor is used for realizing the method for correcting the set value of the intake air flow when calling the computer program stored in the memory.
The communication module is used for communicating with the pressure sensor to acquire data.
The embodiment of the present application does not limit the specific connection medium among the memory, the communication module, and the processor. In fig. 4, the memory and the processor are connected by a bus, the bus is represented by a thick line in fig. 4, and the connection manner between other components is merely illustrative and is not intended to be limiting. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 4, but this does not indicate only one bus or one type of bus.
According to an aspect of the application, a computer program product or computer program is provided, comprising computer instructions, the computer instructions being stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to execute the method of correcting the intake air flow set value in any of the embodiments described above.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method of correcting an intake flow set value, characterized by comprising:
after the working condition information of the engine is determined to meet the set conditions in the first set time period, acquiring an actual air inlet pressure value in the second set time period; the actual air inlet pressure value is used for representing an air inlet pressure value actually generated under the working condition information;
determining a predicted intake pressure value in the second set time period according to the working condition information; the predicted inlet pressure value is used for representing an inlet pressure value predicted to be generated under the working condition information;
determining an intake flow correction coefficient according to the actual intake pressure value and the predicted intake pressure value;
and correcting the air intake flow set value corresponding to the working condition information according to the air intake flow correction coefficient to obtain a target air intake flow value, and adjusting the opening degree of the exhaust gas recirculation valve according to the target air intake flow value.
2. The method of claim 1, wherein determining the predicted intake pressure value within the second set period of time based on the operating condition information comprises:
determining working condition information of the engine in the second set time period;
and determining a pressure value corresponding to the working condition information of the engine in the second set time period based on a preset intake pressure map, and taking the pressure value as a predicted intake pressure value in the second set time period.
3. The method of claim 2, wherein said determining an intake flow correction factor based on said actual intake pressure value and said predicted intake pressure value comprises:
performing integral calculation on the actual intake pressure value in the second set time period to obtain an actual pressure integral value;
performing integral calculation on the estimated air inlet pressure value in the second set time period to obtain an estimated pressure integral value;
the intake flow rate correction coefficient is determined based on the actual pressure integrated value and the predicted pressure integrated value.
4. The method according to claim 3, wherein the determining the intake flow rate correction coefficient based on the actual pressure integrated value and the predicted pressure integrated value includes:
the ratio of the actual pressure integrated value and the predicted pressure integrated value is taken as the intake flow correction coefficient.
5. The method according to any one of claims 1 to 4, wherein the operating condition information includes engine speed and torque; the setting conditions include:
the engine rotating speeds are all larger than a rotating speed set threshold, and the torques are all larger than a torque set threshold.
6. An intake air flow rate set value correction device, characterized by comprising:
the acquiring unit is used for acquiring an actual intake pressure value in a second set time period after the condition information of the engine is determined to meet the set conditions in the first set time period; the actual air inlet pressure value is used for representing an air inlet pressure value actually generated under the working condition information;
the first determining unit is used for determining a predicted intake pressure value in the second set time period according to the working condition information; the predicted inlet pressure value is used for representing an inlet pressure value predicted to be generated under the working condition information;
the second determining unit is used for determining an intake air flow correction coefficient according to the actual intake air pressure value and the predicted intake air pressure value;
and the correcting unit is used for correcting the air inlet flow set value corresponding to the working condition information according to the air inlet flow correction coefficient to obtain a target air inlet flow value, and adjusting the opening degree of the exhaust gas recirculation valve according to the target air inlet flow value.
7. The apparatus according to claim 6, wherein the first determining unit is specifically configured to:
determining working condition information of the engine in the second set time period;
and determining a pressure value corresponding to the working condition information of the engine in the second set time period based on a preset intake pressure map, and taking the pressure value as a predicted intake pressure value in the second set time period.
8. The apparatus according to claim 7, wherein the second determining unit is specifically configured to:
performing integral calculation on the actual intake pressure value in the second set time period to obtain an actual pressure integral value;
performing integral calculation on the estimated air inlet pressure value in the second set time period to obtain an estimated pressure integral value;
the intake flow rate correction coefficient is determined based on the actual pressure integrated value and the predicted pressure integrated value.
9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, the computer program, when executed by the processor, implementing the method of any of claims 1-5.
10. A computer-readable storage medium having a computer program stored therein, the computer program characterized by: the computer program, when executed by a processor, implements the method of any of claims 1-5.
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| CN202210497974.XA CN114962026A (en) | 2022-05-09 | 2022-05-09 | Method and device for correcting set value of intake air flow, electronic device, and storage medium |
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