EGR rate control method, device and equipment and storage medium
By acquiring information on engine intake humidity and speed, and adjusting the EGR rate and valve opening using a MAP meter, the problem of control inaccuracy caused by EGR valve aging was solved, thus meeting engine operating requirements and improving combustion efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2026-04-10
AI Technical Summary
In existing technologies, the EGR valve's actual EGR rate does not match the target EGR rate due to the aging of the gas entering the cylinder due to humidity, which affects the accuracy of controlling the exhaust gas volume and fresh air volume and fails to meet the engine's operating conditions.
By acquiring humidity and speed information at the engine intake end, and using a preset MAP table to determine the adjustment coefficient, the target EGR rate is adjusted and the EGR valve opening is adjusted to correct the actual EGR rate and improve control accuracy.
It improves the accuracy of controlling the amount of exhaust gas and fresh air entering the cylinder per cycle, meets the engine operating requirements, improves fuel combustion efficiency, and reduces harmful gas emissions and fuel consumption.
Smart Images
Figure CN121828012A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive technology, and more specifically to an EGR rate control method, apparatus, device, and storage medium. Background Technology
[0002] Exhaust Gas Recirculation (EGR) is a technology that returns a portion of the exhaust gases produced by a diesel or gasoline engine to the engine cylinders. Its main purpose is to reduce nitrogen oxides (NOx) in the exhaust gases and improve fuel economy under partial load.
[0003] EGR rate, representing the amount of exhaust gas recirculated, is the percentage of exhaust gas entering the engine cylinders relative to the total intake air volume. In some technologies, a target EGR rate is determined based on the vehicle's required torque, and during engine operation, the amount of exhaust gas and fresh air entering the cylinders in each cycle is controlled according to this target EGR rate to ensure the engine operates according to its requirements. However, because the intake air volume is controlled by the EGR valve, and this valve can age due to the humidity of the gas entering the cylinders, the actual EGR rate may not match the target EGR rate. This results in lower accuracy in controlling the amount of exhaust gas and fresh air entering the cylinders in each cycle, ultimately leading to an EGR rate within the cylinders that fails to meet the engine's operating requirements. Summary of the Invention
[0004] In view of this, this application provides an EGR rate control method, apparatus, device, and storage medium to solve the problem in the prior art where the control accuracy of the amount of exhaust gas and fresh air entering the cylinder in each cycle is low, resulting in the EGR rate in the cylinder failing to meet the engine's operating requirements.
[0005] In a first aspect, embodiments of this application provide an EGR rate control method, including:
[0006] Obtain the engine's target EGR rate and actual EGR rate;
[0007] When determining to adjust the target EGR rate based on the engine's target EGR rate and the actual EGR rate, the humidity information at the engine's intake end and the engine's rotational speed information are obtained.
[0008] The adjustment coefficient is determined based on the humidity information at the engine intake and the engine speed information.
[0009] Based on the adjustment coefficient, the target EGR rate is adjusted to obtain the corrected target EGR rate;
[0010] Adjust the EGR valve opening based on the revised target EGR rate.
[0011] In one possible implementation of the first aspect, before obtaining the humidity information at the engine intake end and the engine speed information when determining the adjustment of the target EGR rate based on the target EGR rate and the actual EGR rate of the engine, the method further includes:
[0012] Based on the engine's target EGR rate and the actual EGR rate, if the actual EGR rate is less than the target EGR rate and the difference between the actual EGR rate and the target EGR rate exceeds a preset threshold, then it is determined to adjust the target EGR rate.
[0013] In one possible implementation of the first aspect, determining the adjustment coefficient based on the humidity information at the engine intake end and the engine speed information includes:
[0014] Based on the humidity information at the engine intake and the engine speed information, a preset MAP table is consulted to obtain the adjustment coefficient; wherein, the preset MAP table has a mapping relationship between the humidity information at the engine intake, the engine speed information and the adjustment coefficient.
[0015] In one possible implementation of the first aspect, adjusting the EGR valve opening based on the modified target EGR rate includes:
[0016] The EGR valve flow rate is obtained based on the corrected target EGR rate;
[0017] Adjust the opening degree of the EGR valve based on the EGR valve flow rate.
[0018] In one possible implementation of the first aspect, obtaining the target EGR rate of the engine includes:
[0019] Obtain the parameters of the engine;
[0020] The target EGR rate of the engine is determined based on the engine's parameters.
[0021] In one possible implementation of the first aspect, the parameters of the engine include: the engine speed information.
[0022] In one possible implementation of the first aspect, the adjustment coefficient is a number that is less than 1 and greater than 0.
[0023] Secondly, embodiments of this application provide an EGR rate control device, comprising:
[0024] The acquisition unit is used to acquire the engine's target EGR rate and actual EGR rate.
[0025] The acquisition unit is further configured to acquire humidity information at the engine intake end and engine speed information when determining to adjust the target EGR based on the engine's target EGR rate and the actual EGR rate.
[0026] The processing unit is used to determine the adjustment coefficient based on the humidity information at the engine intake end and the engine speed information;
[0027] The processing unit is further configured to adjust the target EGR rate based on the adjustment coefficient to obtain a corrected target EGR rate;
[0028] The processing unit is also used to adjust the opening of the EGR valve based on the corrected target EGR rate.
[0029] Thirdly, embodiments of this application provide an electronic device, including a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute the method described in any of the first aspects above.
[0030] Fourthly, embodiments of this application provide a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the method described in any of the first aspects.
[0031] Fifthly, embodiments of this application provide a computer program product comprising executable instructions that, when executed on a computer, cause the computer to perform the method described in any of the first aspects.
[0032] The solution provided in this application obtains the target EGR rate and the actual EGR rate of the engine. When determining the target EGR rate to be adjusted based on the target and actual EGR rates, humidity information at the engine intake and engine speed information are obtained. An adjustment coefficient is determined based on the engine's humidity and speed information. The target EGR rate is adjusted based on the adjustment coefficient to obtain a corrected target EGR rate. The EGR valve opening is adjusted based on the corrected target EGR rate. In this way, when the EGR valve ages due to the humidity of the gas entering the cylinder, the target EGR rate can be adjusted to obtain a corrected target EGR rate. Adjusting the EGR valve opening based on the corrected target EGR rate improves the accuracy of controlling the amount of exhaust gas and fresh air entering the cylinder in each cycle, thereby ensuring that the EGR rate in the cylinder meets the engine's operating requirements. Furthermore, accurate control of the amount of exhaust gas and fresh air in the cylinder improves fuel combustion completeness, reducing the generation of harmful gases caused by incomplete combustion and improving exhaust emissions and fuel consumption. Attached Figure Description
[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0034] Figure 1 This application provides a schematic diagram of the structure of an engine system according to an embodiment of the present application.
[0035] Figure 2 A flowchart illustrating an EGR rate control method provided in this application embodiment;
[0036] Figure 3 A flowchart illustrating another EGR rate control method provided in this application embodiment;
[0037] Figure 4 A schematic diagram of the structure of an EGR rate control device provided in an embodiment of this application;
[0038] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation
[0039] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0040] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.
[0041] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0042] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0043] This application provides an EGR rate control method, apparatus, device, and storage medium. The method specifically involves: acquiring the engine's target EGR rate and actual EGR rate; when determining the target EGR rate to be adjusted based on the target and actual EGR rates, acquiring humidity information at the engine intake and engine speed information; determining an adjustment coefficient based on the engine's humidity and speed information; adjusting the target EGR rate based on the adjustment coefficient to obtain a corrected target EGR rate; and adjusting the EGR valve opening based on the corrected target EGR rate. In this way, when the EGR valve ages due to the humidity of the gas entering the cylinder, the target EGR rate can be adjusted to obtain a corrected target EGR rate, and the EGR valve opening can be adjusted based on the corrected target EGR rate. This improves the accuracy of controlling the amount of exhaust gas and fresh air entering the cylinder in each cycle, thereby ensuring that the EGR rate in the cylinder meets the engine's operating requirements. Furthermore, by accurately controlling the amount of exhaust gas and fresh air in the cylinder, the completeness of fuel combustion can be improved, which helps reduce the generation of harmful gases caused by incomplete combustion and improves exhaust emissions and fuel consumption. This will be explained in detail below.
[0044] To better understand the EGR rate control method provided in this application, the structure of the engine system for the EGR rate control method will be briefly introduced first. (See also...) Figure 1 This is a schematic diagram of an engine system provided in an embodiment of this application. Figure 1As shown, the engine system includes: an engine, an intake chamber, an exhaust chamber, an EGR valve, and a humidity detector. The engine's intake end is connected to the output end of the intake chamber, and the engine's exhaust end is connected to the input end of the exhaust chamber. The first output end of the exhaust chamber is used to output exhaust gas, and the second output end of the exhaust chamber is connected to the input end of the EGR valve. The output end of the EGR valve is connected to the first input end of the intake chamber, used to transfer a portion of the exhaust gas in the exhaust chamber to the intake chamber. The second input end of the intake chamber is used to obtain fresh air. The intake chamber mixes the exhaust gas obtained from the first input end with the fresh air obtained from the second input end and transmits it to the engine. The humidity detector is located between the engine and the output end of the intake chamber to detect the humidity information of the air entering the engine.
[0045] See Figure 2 This is a flowchart illustrating an EGR rate control method provided in an embodiment of this application. (Reference) Figure 2 As shown, the method includes:
[0046] Step S201: Obtain the target EGR rate and actual EGR rate of the engine.
[0047] In this embodiment, during the initial stage of engine operation, since the EGR valve has not aged, the actual EGR rate at the engine is essentially the same as the target EGR rate. As the engine's operating time increases, moisture in the air can affect the EGR valve, causing a difference between the actual and target EGR rates at the engine start-up location. To reduce this difference, the target EGR rate needs to be adjusted. Therefore, the EGR rate control device needs to acquire both the engine's actual and target EGR rates. In some embodiments, the EGR rate control device can measure the engine's actual EGR rate using an EGR rate testing device. For example, the actual EGR rate can be calculated by measuring the actual exhaust gas flow rate entering the engine.
[0048] In some embodiments, obtaining the target EGR rate of the engine includes: obtaining engine parameters; and determining the target EGR rate of the engine based on the engine parameters.
[0049] In this embodiment, the target EGR rate varies depending on the engine parameters. To accurately determine the target EGR rate of the engine in this embodiment, it is necessary to first obtain the engine parameters. The EGR rate control device can obtain the engine parameters by communicating with the engine, or it can directly view the engine parameter information. After obtaining the engine parameters, the target EGR rate can be determined using a preset mapping table between engine parameters and the target EGR rate.
[0050] In some embodiments, the engine parameters include engine speed information. Specifically, in this application embodiment, a target EGR table is pre-established, which includes target EGR rates corresponding to different engine speeds. Thus, the EGR rate control device can acquire the engine speed information, look up the target EGR rate in the target EGR rate table based on the engine speed information, and thereby determine the engine's target EGR rate.
[0051] It should be understood that the engine parameters can also be engine load information or other engine parameter information, and the embodiments of this application do not limit this.
[0052] Step S202: When determining the target EGR rate based on the engine's target EGR rate and actual EGR rate, obtain the humidity information at the engine intake end and the engine speed information.
[0053] In this embodiment, after the EGR rate control device obtains the target EGR rate and the actual EGR rate of the engine, it can determine that the target EGR rate needs adjustment if the difference between the target EGR rate and the actual EGR rate is significant. When determining that the target EGR rate needs adjustment, the EGR rate control device needs to obtain an adjustment coefficient. Since the aging of the EGR valve is related to the humidity at the engine intake, the adjustment coefficient required by the EGR rate control device is related not only to the engine speed information but also to the humidity at the engine intake. That is, the EGR rate control device needs to obtain both the humidity information at the engine intake and the engine speed information. The EGR rate control device can obtain humidity information through a humidity detection device at the engine intake. For example, the humidity detection device is a humidity sensor, and the EGR rate control device can obtain humidity information through the humidity sensor. The EGR rate control device can also obtain engine speed information from the engine. Alternatively, if the engine speed information has already been obtained in step S201, the EGR rate control device can directly use the engine speed information obtained in step S201.
[0054] Step S203: Determine the adjustment coefficient based on the humidity information at the engine intake end and the engine speed information.
[0055] In this embodiment, after acquiring the humidity information at the engine intake and the engine speed information, the EGR rate control device can determine an adjustment coefficient based on the acquired humidity information and engine speed information. For example, a conversion relationship between humidity information and adjustment coefficients corresponding to different engine speeds can be preset, thereby obtaining the adjustment coefficient based on the engine speed information and humidity information using the preset conversion relationship. For example, at speed 'a', humidity information * a1% can be used as the conversion relationship. At speed 'b', humidity information * 1 can be used as the conversion relationship, and so on.
[0056] In some embodiments, to reduce the complexity of determining the adjustment coefficient and improve control efficiency, the determination of the adjustment coefficient based on the humidity information at the engine intake and the engine speed information includes:
[0057] Based on the humidity information at the engine intake and the engine speed information, the preset MAP table is consulted to obtain the adjustment coefficient.
[0058] The preset MAP table contains the mapping relationship between humidity information at the engine intake end, engine speed information, and adjustment coefficients.
[0059] In other words, a MAP table can be preset. This preset MAP table records the correspondence between different humidity levels at the engine intake, engine speed, and adjustment coefficients. Thus, after determining the humidity and engine speed at the engine intake, the EGR rate control device can determine the corresponding adjustment coefficients by consulting the preset MAP table.
[0060] In some embodiments, the adjustment coefficient is a number less than 1 and greater than 0. That is, under normal circumstances, after the EGR valve ages, the opening of the EGR valve will become smaller, and the exhaust gas flow into the engine will become smaller, resulting in the actual EGR rate usually being less than the target EGR rate. Therefore, in order to make the corrected target EGR rate closer to the actual EGR rate, the adjustment coefficient can be set to a number less than 1 and greater than 0.
[0061] Step S204: Adjust the target EGR rate based on the adjustment coefficient to obtain the corrected target EGR rate.
[0062] In this embodiment, after determining the adjustment coefficient, the EGR rate control device can adjust the target EGR rate according to the adjustment coefficient to obtain the corrected target EGR rate. In some embodiments, the EGR rate control device can use the product of the adjustment coefficient and the target EGR rate as the corrected target EGR rate.
[0063] Step S205: Adjust the EGR valve opening based on the corrected target EGR rate.
[0064] In this embodiment, the EGR rate control device obtains the corrected target EGR rate and can adjust the opening of the EGR valve based on the corrected target EGR rate, thereby adjusting the exhaust gas flow rate entering the intake chamber. In some embodiments, a correspondence between the target EGR rate and the EGR valve opening can be preset. Thus, after determining the corrected target EGR rate, the opening of the EGR valve corresponding to the corrected target EGR rate can be determined by looking up the preset correspondence between the target EGR rate and the EGR valve opening, and then the EGR valve opening can be adjusted.
[0065] As one possible implementation, in order to improve the accuracy of the EGR valve opening, the above-mentioned adjustment of the EGR valve opening based on the corrected target EGR rate includes: obtaining the EGR valve flow rate based on the corrected target EGR rate; and adjusting the EGR valve opening based on the EGR valve flow rate.
[0066] In this embodiment, the EGR rate is typically obtained using the formula EGR rate = {(exhaust gas flow rate) / (exhaust gas flow rate + fresh air intake rate)} × 100%. Therefore, after calculating the corrected target EGR rate, the EGR rate control device can calculate the EGR valve flow rate using the formula: exhaust gas flow rate = fresh air intake rate * corrected target EGR rate / (1 - corrected target EGR rate). After calculating the EGR valve flow rate, the opening degree of the EGR valve can be determined based on the flow rate and adjusted accordingly. In some embodiments, different correspondences between EGR valve flow rates and EGR valve openings can be preset. After the EGR rate control device calculates the EGR valve flow rate, it can determine the corresponding EGR valve opening by referring to the preset correspondences, thereby adjusting the EGR valve opening. This adjustment adjusts the exhaust gas flow rate, reducing the difference between the actual and target EGR rates. This improves the accuracy of controlling the amount of exhaust gas and fresh air entering the cylinder in each cycle, ensuring the EGR rate within the cylinder meets the engine's operating requirements. Furthermore, accurate control of the exhaust gas and fresh air volume in the cylinder improves fuel combustion completeness, reducing the generation of harmful gases due to incomplete combustion and improving exhaust emissions and fuel consumption.
[0067] As one possible implementation, such as Figure 3 As shown, prior to step S202 above, the method further includes:
[0068] Step S206: Based on the engine's target EGR rate and actual EGR rate, if the actual EGR rate is less than the target EGR rate and the difference between the actual EGR rate and the target EGR rate exceeds a preset threshold, then determine to adjust the target EGR rate.
[0069] In this embodiment, after obtaining the engine's target EGR rate and actual EGR rate, the EGR rate control device needs to determine whether to adjust the target EGR rate based on these two rates. The EGR rate control device can compare the target EGR rate and the actual EGR rate. If the actual EGR rate is less than the target EGR rate, it indicates that the EGR valve is aging. In this case, it is necessary to further detect whether the difference between the target EGR rate and the actual EGR rate exceeds a threshold. That is, when the EGR rate is detected to be less than the target EGR rate, the EGR rate control device can calculate the difference between the actual EGR rate and the target EGR rate, and compare this difference with a preset threshold. If the difference exceeds the preset threshold, it indicates a significant difference between the actual EGR rate and the target EGR rate, and the probability of EGR valve aging is high. Therefore, the EGR rate control device determines that the target EGR rate needs to be adjusted.
[0070] See Figure 4 This is a schematic diagram of an EGR rate control device provided in an embodiment of this application. Figure 4 As shown, the EGR rate control device includes:
[0071] The acquisition unit 401 is used to acquire the target EGR rate and the actual EGR rate of the engine.
[0072] The acquisition unit 401 is also used to acquire humidity information at the engine intake end and engine speed information when determining the target EGR based on the engine's target EGR rate and actual EGR rate.
[0073] The processing unit 402 is used to determine the adjustment coefficient based on the humidity information at the engine intake end and the engine speed information.
[0074] The processing unit 402 is also used to adjust the target EGR rate based on the adjustment coefficient to obtain the corrected target EGR rate.
[0075] The processing unit 402 is also used to adjust the opening of the EGR valve based on the corrected target EGR rate.
[0076] As one possible implementation, the processing unit 402 is further configured to determine to adjust the target EGR rate based on the engine's target EGR rate and the actual EGR rate, when the actual EGR rate is less than the target EGR rate and the difference between the actual EGR rate and the target EGR rate exceeds a preset threshold.
[0077] As one possible implementation, the processing unit 402 is specifically used to look up a preset MAP table and obtain the adjustment coefficient based on the humidity information at the engine intake end and the engine speed information.
[0078] The preset MAP table contains the mapping relationship between humidity information at the engine intake end, engine speed information, and adjustment coefficients.
[0079] As one possible implementation, the processing unit 402 is specifically used to obtain the EGR valve flow rate based on the corrected target EGR rate; and to adjust the EGR valve opening based on the EGR valve flow rate.
[0080] As one possible implementation, the acquisition unit 401 is specifically used to acquire engine parameters and determine the engine's target EGR rate based on the engine parameters.
[0081] As one possible implementation, engine parameters include: engine speed information.
[0082] As one possible implementation, the adjustment factor is a number that is less than 1 and greater than 0.
[0083] Corresponding to the above embodiments, this application also provides an electronic device. Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device 500 may include a processor 501, a memory 502, and a communication unit 503. These components communicate through one or more buses. Those skilled in the art will understand that the structure of the electronic device shown in the figure does not constitute a limitation on the embodiment of the present invention. It may be a bus topology or a star topology, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.
[0084] The communication unit 503 is used to establish a communication channel, enabling the electronic device to communicate with other devices. It receives user data from other devices or sends user data to other devices.
[0085] The processor 501 serves as the control center of the electronic device, connecting various parts of the device via interfaces and lines. It executes software programs, instructions, and / or modules stored in the memory 502, and calls data stored in the memory to perform various functions and / or process data. The processor may be composed of integrated circuits (ICs), such as a single packaged IC or multiple packaged ICs with the same or different functions connected together. For example, the processor 501 may consist only of a central processing unit (CPU). In this embodiment, the CPU may have a single processing core or include multiple processing cores.
[0086] The memory 502 is used to store the execution instructions of the processor 501. The memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.
[0087] When the execution instructions in memory 502 are executed by processor 501, the electronic device 500 is able to perform some or all of the steps in the above embodiments.
[0088] In a specific implementation, the present invention also provides a computer storage medium, wherein the computer storage medium may store a program, and the program, when executed, may include some or all of the steps of the various embodiments of the EGR rate control method provided by the present invention. The storage medium may be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.
[0089] In a specific implementation, the present invention also provides a computer program product, wherein the computer program product includes executable instructions, which, when executed on a computer, cause the computer to perform some or all of the steps in various embodiments of the simulation scene generation method provided by the present invention.
[0090] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or certain parts of the embodiments of the present invention.
[0091] The same or similar parts between the various embodiments in this specification can be referred to mutually. In particular, the device embodiments and terminal embodiments are basically similar to the method embodiments, so the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.
Claims
1. An EGR rate control method, characterized in that, include: Obtain the engine's target EGR rate and actual EGR rate; When determining to adjust the target EGR rate based on the engine's target EGR rate and the actual EGR rate, the humidity information at the engine's intake end and the engine's rotational speed information are obtained. The adjustment coefficient is determined based on the humidity information at the engine intake and the engine speed information. Based on the adjustment coefficient, the target EGR rate is adjusted to obtain the corrected target EGR rate; Adjust the EGR valve opening based on the revised target EGR rate.
2. The method according to claim 1, characterized in that, Before acquiring the humidity information at the engine intake end and the engine speed information when determining and adjusting the target EGR rate based on the engine's target EGR rate and the actual EGR rate, the method further includes: Based on the engine's target EGR rate and the actual EGR rate, if the actual EGR rate is less than the target EGR rate and the difference between the actual EGR rate and the target EGR rate exceeds a preset threshold, then it is determined to adjust the target EGR rate.
3. The method according to claim 1, characterized in that, The determination of the adjustment coefficient based on the humidity information at the engine intake and the engine speed information includes: Based on the humidity information at the engine intake and the engine speed information, a preset MAP table is consulted to obtain the adjustment coefficient; wherein, the preset MAP table has a mapping relationship between the humidity information at the engine intake, the engine speed information and the adjustment coefficient.
4. The method according to claim 1, characterized in that, The adjustment of the EGR valve opening based on the corrected target EGR rate includes: The EGR valve flow rate is obtained based on the corrected target EGR rate; Adjust the opening degree of the EGR valve based on the EGR valve flow rate.
5. The method according to any one of claims 1-4, characterized in that, The acquisition of the engine's target EGR rate includes: Obtain the parameters of the engine; The target EGR rate of the engine is determined based on the engine's parameters.
6. The method according to claim 5, characterized in that, The parameters of the engine include: the engine speed information.
7. The method according to claim 1, characterized in that, The adjustment coefficient is a number that is less than 1 and greater than 0.
8. An EGR rate control device, characterized in that, include: The acquisition unit is used to acquire the engine's target EGR rate and actual EGR rate. The acquisition unit is further configured to acquire humidity information at the engine intake end and engine speed information when determining to adjust the target EGR based on the engine's target EGR rate and the actual EGR rate. The processing unit is used to determine the adjustment coefficient based on the humidity information at the engine intake end and the engine speed information; The processing unit is further configured to adjust the target EGR rate based on the adjustment coefficient to obtain a corrected target EGR rate; The processing unit is also used to adjust the opening of the EGR valve based on the corrected target EGR rate.
9. An electronic device, characterized in that, The device includes a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device performs the method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 7.