Air inlet control method of engine and vehicle

Abstract

The invention discloses an air inlet control method of an engine and a vehicle. The method comprises the steps that target performance parameters of multiple air cylinders in the engine are obtained, the multiple air cylinders are divided into at least two air cylinder sets, and the target performance parameters at least comprise the exhaust gas recirculation degree; based on the target performance parameter of at least one cylinder in the same cylinder group, determining a target adjustment parameter of the cylinder group; and on the basis of the target adjustment parameters, the exhaust gas recirculation degree of at least one air cylinder in the air cylinder set is adjusted, so that the multiple air cylinders have the same exhaust gas recirculation degree. The technical problem that the consistency of the working states of different air cylinders of an engine in the prior art is poor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle engineering, and in particular, to an air intake control method of an engine and a vehicle. BACKGROUND

[0002] Deep Miller cycle is a high-efficiency valve timing technology that can improve the thermal efficiency of an engine and reduce pumping loss, and is particularly suitable for high-load and high-speed working conditions. However, this technology also brings new challenges, one of which is that when the engine uses an asymmetric supercharger, it will cause unevenness of the charge efficiency and the internal exhaust gas recirculation (EGR) of each cylinder of the engine. This uneven distribution of internal EGR not only destroys the working consistency between cylinders, but also may cause combustion instability, ultimately affecting the overall performance and emission level of the engine.

[0003] Current engine air intake control methods are often limited by physical design and have poor effect on improving the working consistency of each cylinder of the engine.

[0004] In view of the above problems, no effective solutions have been proposed so far. SUMMARY

[0005] Embodiments of the present application provide an air intake control method of an engine and a vehicle to at least solve the technical problem of poor working consistency of different cylinders of the engine in related technologies.

[0006] According to an aspect of an embodiment of the present application, an air intake control method of an engine is provided, the engine being provided with an asymmetric supercharger, the method comprising: obtaining target performance parameters of a plurality of cylinders in the engine, wherein the plurality of cylinders are divided into at least two cylinder groups, and the target performance parameters at least include: an exhaust gas recirculation degree; determining a target adjustment parameter of a cylinder group based on the target performance parameters of at least one cylinder in the same cylinder group; and adjusting the exhaust gas recirculation degree of at least one cylinder in the cylinder group based on the target adjustment parameter, so that the plurality of cylinders have the same exhaust gas recirculation degree.

[0007] Further, in the case where the cylinder group includes at least two cylinders, the target adjustment parameter of the cylinder group is determined based on the target performance parameters of at least one cylinder in the same cylinder group, comprising: obtaining a first target mapping relationship corresponding to the cylinder group, wherein the first target mapping relationship is used to represent the mapping relationship between different performance parameters of the at least two cylinders and different adjustment parameters of the cylinder group; and determining the target adjustment parameter based on the first target mapping relationship and the target performance parameters of the at least one cylinder.

[0008] Further, the method further comprises: grouping a plurality of test cylinders in a test engine to obtain a test cylinder group, wherein the type of the test engine is the same as the type of the engine, and the grouping manner of the test cylinder group is the same as the grouping manner of the cylinder group; obtaining a first test performance parameter of at least two test cylinder groups in the test cylinder group during operation of the test engine, wherein the parameter type of the first test performance parameter is the same as the parameter type of the target performance parameter, and the parameter value of the first test performance parameter comprises the parameter value of the target performance parameter of at least one cylinder; determining a first test adjustment parameter of the test cylinder group based on the first test performance parameter of the at least two test cylinder groups and a grouping calibration performance parameter, wherein the grouping calibration performance parameter is used to represent the exhaust gas recirculation degree of the test cylinder group under a preset state, the parameter type of the first test adjustment parameter is the same as the parameter type of the target adjustment parameter, and the parameter value of the first test adjustment parameter comprises the parameter value of the target adjustment parameter; and constructing a first target mapping relationship based on the first test performance parameter and the first test adjustment parameter.

[0009] Further, the method further comprises: grouping a plurality of test cylinders in a test engine to obtain a test cylinder group, wherein the type of the test engine is the same as the type of the engine, and the grouping manner of the test cylinder group is the same as the grouping manner of the cylinder group; obtaining a first test performance parameter of at least two test cylinder groups in the test cylinder group during operation of the test engine, wherein the parameter type of the first test performance parameter is the same as the parameter type of the target performance parameter, and the parameter value of the first test performance parameter comprises the parameter value of the target performance parameter of at least one cylinder; determining a first test adjustment parameter of the test cylinder group based on the first test performance parameter of the at least two test cylinder groups and a grouping calibration performance parameter, wherein the grouping calibration performance parameter is used to represent the exhaust gas recirculation degree of the test cylinder group under a preset state, the parameter type of the first test adjustment parameter is the same as the parameter type of the target adjustment parameter, and the parameter value of the first test adjustment parameter comprises the parameter value of the target adjustment parameter; and constructing a first target mapping relationship based on the first test performance parameter and the first test adjustment parameter.

[0010] Further, the method further comprises: grouping a plurality of test cylinders in a test engine to obtain a test cylinder group, wherein the type of the test engine is the same as the type of the engine, and the grouping manner of the test cylinder group is the same as the grouping manner of the cylinder group; obtaining a first test performance parameter of at least two test cylinder groups in the test cylinder group during operation of the test engine, wherein the parameter type of the first test performance parameter is the same as the parameter type of the target performance parameter, and the parameter value of the first test performance parameter comprises the parameter value of the target performance parameter of at least one cylinder; determining a first test adjustment parameter of the test cylinder group based on the first test performance parameter of the at least two test cylinder groups and a grouping calibration performance parameter, wherein the grouping calibration performance parameter is used to represent the exhaust gas recirculation degree of the test cylinder group under a preset state, the parameter type of the first test adjustment parameter is the same as the parameter type of the target adjustment parameter, and the parameter value of the first test adjustment parameter comprises the parameter value of the target adjustment parameter; and constructing a first target mapping relationship based on the first test performance parameter and the first test adjustment parameter.

[0011] Further, in the case that the cylinder group comprises one cylinder, the target adjustment parameter of the cylinder group is determined based on the target performance parameter of at least one cylinder in the same cylinder group, comprising: obtaining a second target mapping relationship corresponding to the cylinder, wherein the second target mapping relationship is used to represent the mapping relationship between different performance parameters and different adjustment parameters of the cylinder; and determining the target adjustment parameter of the cylinder based on the second target mapping relationship of the cylinder and the target performance parameter of the cylinder.

[0012] Further, the method further comprises: obtaining a second test performance parameter of any one test cylinder of the test engine during the operation of the test engine, wherein the parameter type of the second test performance parameter is the same as that of the target performance parameter of the cylinder, and the parameter value of the second test performance parameter comprises the parameter value of the target performance parameter of the cylinder; determining a second test adjustment parameter based on the second test performance parameter of any one test cylinder and the cylinder calibration performance parameter, wherein the cylinder calibration performance parameter is used to represent the exhaust gas recirculation degree of any one test cylinder of the engine in a preset state, the parameter type of the second test adjustment parameter is the same as that of the target adjustment parameter, and the parameter value of the second test adjustment parameter comprises the parameter value of the target adjustment parameter; and constructing a second target mapping relationship based on the second test performance parameter and the second test adjustment parameter.

[0013] Further, the method further comprises: obtaining an intake state of the plurality of cylinders, wherein the intake state is used to represent the intake amount of the cylinder; grouping the plurality of cylinders based on the intake state and a preset grouping condition to obtain at least two cylinder groups.

[0014] Further, obtaining the intake state of the plurality of cylinders comprises: determining a first distance between any one cylinder and an intake manifold inlet of the engine, wherein the first distances of different cylinders to the intake manifold inlet are different; and determining the intake state of any one cylinder based on the first distance corresponding to the cylinder.

[0015] According to another aspect of the embodiment of the present application, an intake control device of an engine is also provided, wherein the engine is installed with an asymmetric supercharger, and the device comprises: a first obtaining device, configured to obtain target performance parameters of a plurality of cylinders of the engine, wherein the plurality of cylinders are divided into at least two cylinder groups, and the target performance parameters at least comprise an exhaust gas recirculation degree; a first determining device, configured to determine a target adjustment parameter of a cylinder group based on the target performance parameter of at least one cylinder in the same cylinder group; and a first adjusting device, configured to adjust the exhaust gas recirculation degree of at least one cylinder in the cylinder group based on the target adjustment parameter, so that the plurality of cylinders have the same exhaust gas recirculation degree.

[0016] According to another aspect of the embodiments of the present application, a vehicle is also provided, comprising a memory storing an executable program; and a processor configured to execute the program, wherein the program, when executed, performs the method in the embodiments of the present application.

[0017] According to another aspect of the embodiments of the present application, a computer readable storage medium is also provided, comprising a stored executable program, wherein the executable program, when executed, controls a device in which the computer readable storage medium is located to perform the method in the embodiments of the present application.

[0018] According to another aspect of the embodiments of the present application, a computer program product is also provided, comprising a computer program which, when executed by a processor, implements the method in the embodiments of the present application.

[0019] According to another aspect of the embodiments of the present application, a computer program product is also provided, comprising a non-volatile computer readable storage medium storing a computer program which, when executed by a processor, implements the method in the embodiments of the present application.

[0020] According to another aspect of the embodiments of the present application, a computer program is also provided, which, when executed by a processor, implements the method in the embodiments of the present application.

[0021] In the embodiments of the present application, the target performance parameters of multiple cylinders in an engine are obtained; the target adjustment parameters of a cylinder group are determined based on the target performance parameters of at least one cylinder in the same cylinder group; and the EGR degree of at least one cylinder in the cylinder group is adjusted based on the target adjustment parameters, so that the multiple cylinders have the same EGR degree. In this way, by dividing the multiple cylinders into at least two cylinder groups and obtaining the target performance parameters of each cylinder group, the current operating state of each cylinder group of the engine is comprehensively understood, the target adjustment parameters of each cylinder group are further calculated and determined, the adjustment parameters corresponding to each cylinder group and capable of compensating for the EGR imbalance caused by the difference in cylinder layout are found out, and the EGR degree of each cylinder group is regulated, so as to improve the overall performance of the engine and the high consistency of the operating states of the cylinders, thereby solving the technical problem of poor consistency of the operating states of different cylinders in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0023] Figure 1 is a flowchart of an intake control method of an engine according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of an engine intake control device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

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

[0027] According to an embodiment of the present application, an embodiment of an engine intake control method is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that described herein.

[0028] Figure 1 is a flowchart of an engine intake control method according to an embodiment of the present application, wherein an asymmetric supercharger is installed in the engine, as shown in Figure 1 The method comprises the following steps:

[0029] Step S102, obtaining target performance parameters of a plurality of cylinders in the engine, wherein the plurality of cylinders are divided into at least two cylinder groups, and the target performance parameters at least include: an exhaust gas recirculation degree.

[0030] The target performance parameter can be a performance parameter of the engine in actual operation, for example, the target performance parameter can include at least the EGR degree of the plurality of cylinders. The EGR degree can refer to the ratio of the amount of exhaust gas recirculated to the combustion chamber to the amount of fresh intake air.

[0031] In an optional embodiment, it is considered that each cylinder of the engine should theoretically have the same working characteristics, but in actual operation, due to manufacturing tolerances, wear differences, cooling system efficiency differences, intake and exhaust system layout, etc., the performance between the cylinders can not be consistent. By grouping the cylinders and obtaining the target performance parameter, the working state of each cylinder group can be adjusted more accurately to achieve consistency in overall performance. Therefore, various sensors (such as EGR flow sensors, cylinder pressure sensors, temperature sensors, etc.) can be installed on the engine to monitor the target performance parameter of different cylinders in real time. The sensors can send the obtained target performance parameter to the intake control system (hereinafter referred to as the control system) of the engine for collection and processing.

[0032] For example, the EGR degree is a key parameter that affects combustion efficiency and emission quality. By monitoring and adjusting the EGR degree of each cylinder group through the EGR flow sensor, the control system can timely understand the operation of each cylinder group, thereby facilitating the maintenance of consistent EGR degree of each cylinder under different loads and speeds to maintain the optimal combustion state of the engine, thereby improving efficiency and reducing harmful emissions.

[0033] In addition, when the EGR degrees of the plurality of cylinders are deviated, the control system needs to adjust the EGR degrees of the plurality of cylinders so that the EGR degrees of the plurality of cylinders tend to be consistent. In order to improve the adjustment efficiency of the plurality of cylinders, the control system can also divide the plurality of cylinders in advance to distribute the cylinders with relatively close EGR degrees to the same cylinder group, thereby obtaining the at least two cylinder groups. At this time, the control system can adjust the EGR degree of each cylinder group as the adjustment unit, thereby achieving efficient adjustment of the EGR degree of the plurality of cylinders.

[0034] Step S104, determining a target adjustment parameter of the cylinder group based on the target performance parameter of at least one cylinder in the same cylinder group.

[0035] The target adjustment parameter can be a parameter for adjusting the operating state of each cylinder of the engine, for example, the target adjustment parameter can be a Miller cycle degree for adjusting the valve opening and closing time, opening duration or lift, etc., but not limited thereto. The design purpose of the target adjustment parameter can be to make the EGR degrees of the cylinders consistent, but not limited thereto.

[0036] In an optional embodiment, considering that ideally each cylinder should have similar working efficiency and performance to ensure the overall performance of the engine stable, however, due to the influence of manufacturing tolerances, internal fluid dynamics of the engine, factors such as the length and structure of the intake and exhaust pipes, the performance of each cylinder in actual operation may vary, in order to ensure that the EGR levels of each cylinder tend to be consistent, the control system can select the target performance parameter of one or more cylinders in the same cylinder group as the representative of the cylinder group, and set the target adjustment parameter for the entire cylinder group based on the target performance parameter, so as to narrow the gap between the performances of each cylinder and improve the consistency of the overall performance of the engine cylinders.

[0037] For example, within the same cylinder group, the control system can calculate the average of the EGR levels of multiple cylinders, and based on the average, determine how to adjust the timing of valve opening and closing through the technology of variable valve timing to change the degree of Miller cycle. Specifically, it can be assumed that the above-mentioned engine has 2n cylinders, of which the first to nth cylinders are the first cylinder group and the nth to 2nth cylinders are the second cylinder group, if the average of the EGR levels of the first cylinder group is higher, it can be determined that the above-mentioned target adjustment parameter is to reduce the degree of Miller cycle of the first cylinder group to a target value A, similarly, if the EGR level of the second cylinder group is lower, it can be determined that the above-mentioned target adjustment parameter is to increase the degree of Miller cycle of the second cylinder group to a target value B, so as to achieve the consistency of the performance of each cylinder in the engine.

[0038] It should be noted that the above-mentioned cylinder number and grouping are only exemplary, and the staff can set it according to the actual needs, which is not limited here.

[0039] Step S106, based on the target adjustment parameter, adjusting the exhaust gas recirculation level of at least one cylinder in the cylinder group, so that multiple cylinders have the same exhaust gas recirculation level.

[0040] In an optional embodiment, considering that the intake and exhaust system of the engine may have unbalanced phenomena, for example, the length and shape of the intake pipe are different or asymmetric superchargers are used, which will cause the difference of charge efficiency and exhaust back pressure of each cylinder, and further affect the EGR level of each cylinder, in order to ensure that the cylinders in the above-mentioned engine can achieve good EGR effect under various working conditions, and further maintain the high performance operation of the overall engine, the control system can adjust the exhaust gas recirculation level of at least one cylinder in the cylinder group based on the target adjustment parameter constructed in the foregoing steps, so that multiple cylinders in the engine have the same exhaust gas recirculation level.

[0041] In the embodiment of the present application, the target performance parameters of multiple cylinders in the engine are acquired; the target adjustment parameter of a cylinder group is determined based on the target performance parameter of at least one cylinder in the same cylinder group; and the EGR degree of at least one cylinder in the cylinder group is adjusted based on the target adjustment parameter, so as to make the multiple cylinders have the same EGR degree. In this way, by dividing the multiple cylinders into at least two cylinder groups and acquiring the target performance parameter of each cylinder group, the current operation state of each cylinder group of the engine is comprehensively understood, the target adjustment parameter of each cylinder group is further calculated and determined, the adjustment parameter corresponding to each cylinder group and capable of compensating for the EGR imbalance caused by the difference in cylinder layout is found out, and the EGR degree of each cylinder group is regulated, so as to realize the improvement of the overall performance of the engine and the high consistency of the working states of the cylinders, thereby solving the technical problem of poor consistency of the working states of different cylinders in the engine in the related art.

[0042] Further, in the case where the cylinder group includes at least two cylinders, the target adjustment parameter of the cylinder group is determined based on the target performance parameter of at least one cylinder in the same cylinder group, including: acquiring a first target mapping relationship corresponding to the cylinder group, wherein the first target mapping relationship is used to represent the mapping relationship between different performance parameters of the at least two cylinders and different adjustment parameters of the cylinder group; and determining the target adjustment parameter based on the first target mapping relationship and the target performance parameter of the at least one cylinder.

[0043] The first target mapping relationship described above can be a pre-established data structure, and the first target mapping relationship represents the relationship between different performance parameters of each cylinder in the cylinder group of the engine and the overall adjustment parameter of the cylinder group. The first mapping relationship described above can be a result obtained through a large number of experiments and computer simulations in the design and test stage of the engine, and is used to guide the control system to adjust the operation parameters of the engine according to the change in the performance of the cylinders during actual operation, so as to make the EGR degrees of the cylinders of the engine tend to be consistent.

[0044] In an alternative embodiment, to efficiently and accurately adjust the performance difference between different cylinders, the control system can establish a first target mapping relationship described above, which can be a mathematical model, relating the performance parameters of at least two cylinders to the adjustment parameters of the cylinder group. For example, the mapping relationship between the adjustment parameters of the cylinder group and the performance parameters of the cylinders under different working conditions can be obtained through experiments and simulations as the first target mapping relationship described above, which helps the control system make accurate adjustment decisions in real-time control. After obtaining the first target mapping relationship, when it is monitored that the target performance parameters of at least one cylinder in a cylinder group do not meet the performance indicators, the control system can use the first target mapping relationship described above to determine the adjustment parameters of the cylinder group required for the cylinder to meet the performance indicators. By using the target adjustment parameters determined based on the first target mapping relationship described above, the cylinder group can be adjusted to reduce or eliminate the performance difference between different cylinders, achieving the consistency of the overall performance of the cylinder group, which is crucial for the smooth operation of the multi-cylinder engine, the reduction of emissions, the improvement of fuel efficiency, etc.

[0045] For example, the control system can change the adjustment parameters according to a predetermined parameter range and step size based on an experimental or simulation platform, while recording the performance parameters of all cylinders. This process will generate a large number of data points, each data point corresponding to a set of performance parameters under a set of adjustment parameters. Subsequently, the control system can use statistical methods, machine learning or more traditional mathematical modeling to analyze the functional relationship between the performance parameters and the adjustment parameters from the above data points, i.e. to construct the first target mapping relationship described above. The control system can also use additional experimental data or simulation results to verify the accuracy and reliability of the constructed mapping relationship, which helps to find any bias or deficiency in the model and make necessary corrections to the model. Finally, the control system can use the first mapping relationship described above to determine the target adjustment parameters based on the target performance parameters of at least one cylinder.

[0046] Further, the method further comprises: grouping a plurality of test cylinders in the test engine to obtain a test cylinder group, wherein the test engine is of the same type as the engine, and the test cylinder group is divided in the same manner as the cylinder group; obtaining a first test performance parameter of at least two test cylinder groups in the test cylinder group during operation of the test engine, wherein the first test performance parameter is of the same type as the target performance parameter, and a parameter value of the first test performance parameter comprises a parameter value of the target performance parameter of at least one cylinder; determining a first test adjustment parameter of the test cylinder group based on the first test performance parameter of the at least two test cylinder groups and a grouping calibration performance parameter, wherein the grouping calibration performance parameter is used to represent an exhaust gas recirculation degree of the test cylinder group in a preset state, the first test adjustment parameter is of the same type as the target adjustment parameter, and a parameter value of the first test adjustment parameter comprises a parameter value of the target adjustment parameter; and constructing a first target mapping relationship based on the first test performance parameter and the first test adjustment parameter.

[0047] The test engine can be an engine sample for research and development, and the test engine and the engine have the same type and specifications to facilitate testing.

[0048] The test cylinder group can refer to a selected part of the cylinders in the test engine, which is used to analyze the relationship between different performance parameters and different adjustment parameters.

[0049] The first test performance parameter can be a performance parameter collected from the test cylinder group during testing, and the type of the first test performance parameter is the same as that of the target performance parameter on the actual engine, and the parameter value of the first test performance parameter covers the parameter value of the target performance parameter.

[0050] The grouping calibration performance parameter can be an exhaust gas recirculation degree or other performance parameter set for the test cylinder group. The grouping calibration performance parameter can be a result obtained through engineering design and calibration based on experimental data and simulation analysis, and is used as a reference standard in the process of constructing the first target mapping relationship.

[0051] The first test adjustment parameter can be an adjustment parameter of the test cylinder group to meet the requirements of the grouping calibration performance parameter, for example, the first test adjustment parameter can be a Miller degree setting of different cylinders, but is not limited thereto. The first test adjustment parameter is of the same type as the target adjustment parameter, and the parameter value of the first test adjustment parameter covers the parameter value of the target adjustment parameter.

[0052] In an alternative embodiment, in order to ensure that the test results can be directly applied to the target engine, avoiding the mismatch of performance parameters caused by the differences in engine models and structures, a full-condition calibration can be performed on a test engine of the same type as the above-mentioned engine. By using a test engine of the same type, it can be ensured that the data obtained under similar operating conditions has high reference value, reducing the workload of subsequent adjustment and verification. Specifically, the control system can group a plurality of test cylinders in the above-mentioned test engine, thereby obtaining a plurality of test cylinder groups. The division method of the test cylinder groups can be the same as the division method of the cylinder groups in the above-mentioned engine. Subsequently, the control system can control the above-mentioned test engine to operate and obtain a plurality of first test performance parameters of the test cylinder groups when the test engine is operating, in order to collect the performance of the test engine under actual operating conditions. By monitoring the above-mentioned first test performance parameters of each test cylinder group in real time through sensors, the real performance of the engine under different loads, speeds and temperatures can be captured, which is the basis for establishing the mapping relationship and the premise for subsequent calculation of adjustment parameters.

[0053] The above-mentioned first test performance parameters can have the same parameter type as the above-mentioned target performance parameters. In order to accurately construct the above-mentioned first target mapping relationship, the above-mentioned first test performance parameters can also be calibrated under full-condition, in order to cover the target performance parameters of the above-mentioned at least one cylinder. Further considering that the above-mentioned grouping calibration performance parameters reflect the EGR degree and other key indicators of the engine in the ideal state, by comparing the above-mentioned first test performance parameters and the grouping calibration performance parameters, the deviation of the performance of the above-mentioned at least two test cylinder groups can be quantified, and the above-mentioned first test adjustment parameters can be determined by using the control strategy, in order to compensate for these deviations, so that the above-mentioned at least two test cylinder groups achieve the expected performance target.

[0054] Therefore, after obtaining the above-mentioned first test performance parameters of the at least two test cylinder groups, the control system can determine the first test adjustment parameters of the test cylinder groups according to the first test performance parameters and the grouping calibration performance parameters. Finally, in order to be able to predict and guide the change of the adjustment parameters according to the real-time performance parameters, thereby automatically adjusting the operating state of each cylinder of the engine under different operating conditions, the control system can establish an association model according to the obtained above-mentioned first test performance parameters and first test adjustment parameters, in order to obtain the above-mentioned first target mapping relationship.

[0055] Further, based on the first test performance parameter of the at least two test cylinder groups and the grouping calibration performance parameter, the first test adjustment parameter of the test cylinder group is determined, including: in response to the first test performance parameter of the test cylinder group not satisfying the grouping calibration performance parameter, an initial adjustment parameter of the test cylinder group is constructed; based on the initial adjustment parameter, the exhaust gas recirculation degree of the test cylinder group is adjusted, and the adjusted exhaust gas recirculation degree is monitored to obtain a monitoring performance parameter; in response to the monitoring performance parameter satisfying the grouping calibration performance parameter, the initial adjustment parameter is determined as the first test adjustment parameter; in response to the monitoring performance parameter not satisfying the grouping calibration performance parameter, the initial adjustment parameter is adjusted to obtain a new adjustment parameter, and the step of adjusting the exhaust gas recirculation degree of the test cylinder group based on the new adjustment parameter and monitoring the adjusted exhaust gas recirculation degree to obtain a monitoring performance parameter is re-executed until the monitoring performance parameter satisfies the grouping calibration performance parameter, and the new adjustment parameter is determined as the first test adjustment parameter.

[0056] The initial adjustment parameter can be an adjustment parameter set at the beginning of a control cycle. The initial adjustment parameter can be determined based on previous experience or model prediction. The monitoring performance parameter can refer to a monitoring value used to evaluate whether the performance of the cylinder group reaches the grouping calibration performance parameter after the cylinder group is adjusted.

[0057] In an optional embodiment, considering that the grouping calibration performance parameter is set according to the performance requirement of the test cylinder group when the engine is running under ideal or standard conditions, by comparison, the control system can identify whether the first test performance parameter deviates from the calibrated performance index. If the first test performance parameter deviates from the grouping calibration performance parameter set when the engine is designed, it means that the performance of the current test cylinder group fails to reach the expected target, and the running state of each cylinder in the test cylinder group needs to be adjusted. In order to adjust the running state of each cylinder in the test cylinder group to make the test cylinder group meet the calibration performance parameter, based on the first test performance parameter, the control system can analyze the specific reason for not meeting the calibration performance parameter, so as to construct an initial adjustment parameter, and adjust the test cylinder group according to the constructed initial adjustment parameter to change the exhaust gas recirculation degree of the test cylinder group.

[0058] After the above adjustment is completed, in order to verify whether the initial adjustment parameter can achieve the expected adjustment effect, the control system can perform performance monitoring on the test cylinder group again to obtain the exhaust gas recirculation degree of the adjusted test cylinder group, that is, the monitoring performance parameter. When the monitoring performance parameter satisfies the grouping calibration performance parameter, it means that the initial adjustment parameter for adjusting the cylinders in the test cylinder group is effective, and at this time, the control system can directly determine the initial adjustment parameter as the first test adjustment parameter.

[0059] When the monitoring performance parameter still does not satisfy the grouping calibration performance parameter, it means that the initial adjustment parameter is not enough for the adjustment of each cylinder in the cylinder group, and the initial adjustment parameter needs to be improved. At this time, the control system can further adjust the initial adjustment parameter according to the difference between the monitoring performance parameter and the grouping calibration performance parameter, so as to obtain a new adjustment parameter. In order to verify whether the new adjustment parameter can meet the adjustment requirement and make the performance parameter of the test cylinder group reach the grouping calibration performance parameter, the control system can also adjust the running state of each cylinder in the test cylinder group according to the new adjustment parameter, and monitor the performance of the adjusted test cylinder group to obtain a new monitoring performance parameter. The above process is repeated until the new monitoring performance parameter satisfies the grouping calibration performance parameter, and the current new adjustment parameter is determined as the first test adjustment parameter.

[0060] Further, the initial adjustment parameter is adjusted to obtain a new adjustment parameter, including: in response to the monitoring performance parameter being less than or equal to the grouping calibration performance parameter, the initial adjustment parameter is increased based on a preset adjustment strategy and a preset adjustment parameter to obtain the new adjustment parameter; and in response to the monitoring performance parameter being greater than the grouping calibration performance parameter, the initial adjustment parameter is decreased based on the preset adjustment strategy and the preset adjustment parameter to obtain the new adjustment parameter.

[0061] The preset adjustment strategy can be an algorithm or rule designed in advance to determine how to adjust the initial adjustment parameter according to the deviation between the monitoring performance parameter and the target calibration performance parameter. For example, the preset adjustment strategy can use a proportional integral differential (PID) controller, which can adjust the control parameter according to the size of the deviation (proportional term), the accumulation of the deviation (integral term) and the rate of change of the deviation (derivative term), but is not limited thereto.

[0062] The preset adjustment parameter can be a parameter for adjusting the performance of the engine, such as miller degree, asymmetric supercharger pressure, etc., but is not limited thereto.

[0063] In an alternative embodiment, in order to achieve closed-loop control of the test engine operating state and ensure that the cylinder groups in the test engine can achieve predetermined performance indicators under different operating conditions, the control system can perform different adjustment processes on the initial adjustment parameters according to the specific circumstances of the monitored performance parameters. The control system can preform a preset adjustment strategy based on a large amount of experimental data and simulation analysis to guide the control system to adjust the initial adjustment parameters, and in addition, the control system can also preform the preset adjustment parameters based on the preset adjustment strategy to ensure that the adjustment process does not cause damage to the test engine, while quickly and effectively achieving the target state.

[0064] Specifically, when the monitored performance parameter is less than or equal to the grouping calibration performance parameter, it indicates that the operating state of the current test cylinder group may not be ideal, for example, the EGR degree is insufficient, etc. At this time, the control system can increase the initial adjustment parameters according to the preset adjustment strategy and the preset adjustment parameters to maintain the EGR degree of each test cylinder group consistent. Conversely, when the monitored performance parameter is greater than the grouping calibration performance parameter, it means that the test cylinder group may be in an over-adjusted state, such as too high EGR rate, which can cause unstable combustion or reduce engine efficiency. At this time, the control system can decrease the corresponding initial adjustment parameters according to the preset adjustment strategy and the preset adjustment parameters to avoid unnecessary energy waste and make the EGR degree of each test cylinder group consistent.

[0065] For example, if the control system monitors that the EGR degree of the test cylinder group is less than or equal to the EGR degree calibration value, the Miller degree can be increased to increase the amount of exhaust gas residue, and vice versa. If the control system monitors that the EGR degree of the test cylinder group is greater than the EGR degree calibration value, the Miller degree can be reduced to reduce the exhaust gas residue, and other parameters such as boost pressure and ignition advance angle can be adjusted to maintain the EGR degree of each test cylinder group consistent, thereby ensuring that the overall performance of the engine is not affected.

[0066] Further, in the case where the cylinder group includes one cylinder, the target adjustment parameter of the cylinder group is determined based on the target performance parameter of at least one cylinder in the same cylinder group, including: obtaining a second target mapping relationship corresponding to the cylinder, wherein the second target mapping relationship is used to represent the mapping relationship between different performance parameters and different adjustment parameters of the cylinder; and determining the target adjustment parameter of the cylinder based on the second target mapping relationship of the cylinder and the target performance parameter of the cylinder.

[0067] The second target mapping relationship can be a mathematical relationship model established in advance through experiments and simulations, and describes the relationship between the performance parameter and the adjustment parameter of a single cylinder. The second target mapping relationship can help the control system to accurately find a suitable target adjustment parameter under a given target performance parameter.

[0068] In an alternative embodiment, in order to improve the pertinence and accuracy of the adjustment process, the control system can also adjust each cylinder in addition to grouping adjustment of the cylinders in the engine, and the cylinder group contains only one cylinder at this time. In addition, due to factors such as manufacturing tolerances, position distribution, and thermodynamic characteristics, the performance of different cylinders can have slight differences, for example, the length and bending degree of the intake pipe can affect the charging efficiency of different cylinders. Therefore, the control system can obtain a second target mapping relationship representing the mapping relationship between different performance parameters and different adjustment parameters of the cylinders to achieve targeted adjustment of different cylinders, and the construction process of the second target mapping relationship can be similar to that of the first target mapping relationship, i.e., obtained by testing the motor under full working conditions. After obtaining the second target mapping relationship, the control system can determine the target adjustment parameters of the cylinders based on the target performance parameters of the different cylinders using the second target mapping relationship.

[0069] Further, the method further includes: obtaining a second test performance parameter of any one of the test cylinders in the test engine during operation of the test engine, wherein the parameter type of the second test performance parameter is the same as that of the target performance parameter of the cylinder, and the parameter value of the second test performance parameter includes the parameter value of the target performance parameter of the cylinder; determining a second test adjustment parameter based on the second test performance parameter and the cylinder calibration performance parameter of any one of the test cylinders, wherein the cylinder calibration performance parameter is used to represent the exhaust gas recirculation degree of any one of the test cylinders in the test engine in a preset state, the parameter type of the second test adjustment parameter is the same as that of the target adjustment parameter, and the parameter value of the second test adjustment parameter includes the parameter value of the target adjustment parameter; and constructing a second target mapping relationship based on the second test performance parameter and the second test adjustment parameter.

[0070] The second test performance parameter can be obtained during the test of the engine, and is used to describe the actual running state of the test cylinder. The parameter type of the second test performance parameter is consistent with that of the target performance parameter, and the parameter value of the second test performance parameter covers the parameter value of the target performance parameter.

[0071] The cylinder calibration performance parameter can be an exhaust gas recirculation rate or other performance parameter set for the test cylinder. The cylinder calibration performance parameter can be a result obtained through an engineering design and calibration process based on experimental data and simulation analysis, and used as a reference standard in the process of constructing the second target mapping relationship.

[0072] The second test adjustment parameter can be a parameter used to adjust the cylinder of the engine to meet the cylinder calibration performance parameter. The second test adjustment parameter has the same parameter type as the target adjustment parameter, and the parameter value of the second test adjustment parameter covers the parameter value of the target adjustment parameter.

[0073] In an optional embodiment, in order to accurately construct the mapping relationship between different performance parameters and different adjustment parameters, the control system can construct the second target mapping relationship through full-condition calibration in a test environment. Specifically, the control system can obtain a second test performance parameter of any test cylinder of the test engine during the operation of the test engine. The parameter type of the second test performance parameter can be the same as that of the target performance parameter of the cylinder, and the parameter value of the second test performance parameter can cover the parameter value of the target performance parameter, so as to more comprehensively evaluate the relationship between the performance parameter and the adjustment parameter of the cylinder.

[0074] The control system can also determine the cylinder calibration performance parameter in advance through simulation and experiment during the design stage of the engine, so as to describe the exhaust gas recirculation rate of the cylinder in an ideal state. By comparing the second test performance parameter of the test cylinder with the cylinder calibration performance parameter, the performance deviation of the test cylinder can be identified, and the control system can accurately determine the second test adjustment parameter. The second test adjustment parameter can have the same parameter type as the target adjustment parameter, and in order to meet the adjustment requirements of different test cylinders under different conditions, the parameter value of the second test adjustment parameter can cover the parameter value of the target adjustment parameter. The test cylinder is adjusted by using the second test adjustment parameter to eliminate the performance deviation, so that the test cylinder can meet the requirements of the cylinder calibration performance parameter after adjustment of the second test adjustment parameter.

[0075] After the second test adjustment parameter is constructed, the control system can construct a second target mapping relationship based on the second test performance parameter and the second test adjustment parameter. By constructing the second target mapping relationship, the control system can quickly and accurately determine the corresponding adjustment parameter according to the performance parameter of each cylinder.

[0076] Further, the method further comprises: obtaining intake states of the plurality of cylinders, wherein the intake state is used to represent an intake amount of the cylinder; and grouping the plurality of cylinders based on the intake state and a preset grouping condition, to obtain at least two cylinder groups.

[0077] The intake state can be an actual intake condition of the engine cylinder in the intake stroke, reflecting the filling degree of the gas inside the cylinder. The preset grouping condition can be a rule or standard set for classifying the plurality of cylinders according to the similarity or difference of the intake state or other related operating parameters, for example, the preset grouping condition can include at least one or more of the following: cylinder position, intake state, exhaust gas recirculation degree, etc., but is not limited thereto.

[0078] In an optional embodiment, considering that in a multi-cylinder engine, in order to ensure the working efficiency of the engine, the working conditions of all the cylinders in the engine need to be as same as possible, but due to the physical characteristics of the intake pipeline, such as length, curvature and the position of the branch point, in fact, different cylinders can receive different intake pressures and flow rates. By grouping the cylinders with similar intake states, the control system can take targeted measures such as adjusting the Miller cycle degree to make the EGR degree of each cylinder consistent. Therefore, the control system can first obtain the intake states of the plurality of cylinders in the engine to understand the difference in the intake amount of the plurality of cylinders. Subsequently, the control system can group the plurality of cylinders according to the difference in the intake state of each cylinder using the preset grouping condition, thereby obtaining at least two cylinder groups.

[0079] For example, it can be assumed that an engine using an asymmetric supercharger has 6 cylinders, wherein the 6 cylinders all take gas from the same intake manifold. Due to the different distances of different cylinders from the intake manifold inlet, the intake states of the first to third cylinders are relatively close, the intake states of the fourth to sixth cylinders are relatively close, and the actual intake states of the first to third cylinders and the fourth to sixth cylinders are significantly different. At this time, the control system can divide the first to third cylinders into a first cylinder group and the fourth to sixth cylinders into a second cylinder group, so as to subsequently adjust the EGR degree of each cylinder group in units of cylinder groups, so that the EGR degree of each cylinder group tends to be consistent.

[0080] It should be noted that the number of cylinders, the number of cylinder groups and the cylinder division method are only exemplary, and the staff can set them according to actual needs, which are not limited herein.

[0081] Further, the intake state of each cylinder is obtained by determining a first distance between any one of the cylinders and an inlet of an intake manifold of the engine, wherein the first distances of different cylinders to the inlet of the intake manifold are different, and determining the intake state of any one of the cylinders based on the first distance corresponding to the cylinder.

[0082] The first distance can be a straight-line distance between the intake port of the cylinder and the inlet of the intake manifold. The first distance directly affects the intake pressure loss and the intake uniformity, and is crucial for determining the intake state of each cylinder.

[0083] In an optional embodiment, considering that the intake manifold of the engine is usually a shared pipeline for providing air to all the cylinders, due to the length and shape of the pipeline, when the air flows, the air has been attenuated before reaching the far-end cylinder under the conditions of high rotation speed and high compression ratio, resulting in that the cylinder close to the inlet of the intake manifold is more likely to obtain sufficient intake than the cylinder far away from the inlet of the intake manifold. Therefore, the intake state of different cylinders has a high correlation with the first distance of the cylinder to the inlet of the intake manifold. Further considering that the first distances of different cylinders to the inlet of the intake manifold are different, in order to accurately determine the intake state of any one of the cylinders, the control system can first determine the first distance between the cylinder and the inlet of the intake manifold of the engine, and then determine the intake state of any one of the cylinders based on the first distance.

[0084] For example, the inlet of the intake manifold can be selected as a starting point of measurement, and the intake valve of each cylinder can be selected as an ending point of measurement, and a precise measurement tool such as a three-dimensional laser scanner or a high-precision digital vernier caliper can be used to measure the actual distance from the inlet of the intake manifold to the intake valve of each cylinder. The measured first distances are stored in the control system to facilitate analysis of the differences in the first distances between different cylinders. Then, the control system can establish a mapping relationship between the first distance and the intake state through experimental and simulation analysis based on the measured first distances, so that the control system can calculate the intake state of different cylinders according to the first distance. Through the above steps, the control of the intake state of the engine can be effectively realized, and the performance of each cylinder under the condition of non-uniform gas distribution is ensured to be consistent, thereby improving the overall efficiency and stability of the engine.

[0085] According to an embodiment of the present application, an embodiment of an intake control device of an engine is provided. It should be noted that the device can be used to execute the above-mentioned method for controlling the intake of the engine. The specific implementation and application scenarios are the same as those of the above-mentioned embodiment, and will not be repeated here. Figure 2 is a schematic diagram of an intake control device of an engine according to an embodiment of the present application, wherein an asymmetric supercharger is installed in the engine, as shown in Figure 2 The device comprises:

[0086] The first obtaining module 202 is configured to obtain target performance parameters of a plurality of cylinders in an engine, wherein the plurality of cylinders are divided into at least two cylinder groups, and the target performance parameters at least include an exhaust gas recirculation degree.

[0087] The first determining module 204 is configured to determine a target adjustment parameter of a cylinder group based on the target performance parameters of at least one cylinder in the cylinder group.

[0088] The first adjustment module 206 is configured to adjust the exhaust gas recirculation degree of at least one cylinder in the cylinder group based on the target adjustment parameter, so that the plurality of cylinders have the same exhaust gas recirculation degree.

[0089] Further, in the case where the cylinder group includes at least two cylinders, the first determining module is further configured to: obtain a first target mapping relationship corresponding to the cylinder group, wherein the first target mapping relationship is used to represent a mapping relationship between different performance parameters of the at least two cylinders and different adjustment parameters of the cylinder group; and determine the target adjustment parameter based on the first target mapping relationship and the target performance parameters of the at least one cylinder.

[0090] Further, the device further includes: a first grouping module configured to group a plurality of test cylinders in a test engine to obtain a test cylinder group, wherein the type of the test engine is the same as the type of the engine, and the division manner of the test cylinder group is the same as the division manner of the cylinder group; a second obtaining module configured to obtain first test performance parameters of at least two test cylinder groups in the test cylinder group during the operation of the test engine, wherein the parameter type of the first test performance parameters is the same as the parameter type of the target performance parameters, and the parameter value of the first test performance parameters includes the parameter value of the target performance parameters of the at least one cylinder; a second determining module configured to determine first test adjustment parameters of the test cylinder group based on the first test performance parameters of the at least two test cylinder groups and grouping calibration performance parameters, wherein the grouping calibration performance parameters are used to represent the exhaust gas recirculation degree of the test cylinder group when the engine is in a preset state, the parameter type of the first test adjustment parameters is the same as the parameter type of the target adjustment parameters, and the parameter value of the first test adjustment parameters includes the parameter value of the target adjustment parameters; and a first constructing module configured to construct a first target mapping relationship based on the first test performance parameters and the first test adjustment parameters.

[0091] Further, the second determining module is further configured to: in response to the first test performance parameter of the test cylinder group not satisfying the grouping calibration performance parameter, construct an initial adjustment parameter of the test cylinder group; adjust the exhaust gas recirculation rate of the test cylinder group based on the initial adjustment parameter, and monitor the adjusted exhaust gas recirculation rate to obtain a monitoring performance parameter; in response to the monitoring performance parameter satisfying the grouping calibration performance parameter, determine that the initial adjustment parameter is the first test adjustment parameter; in response to the monitoring performance parameter not satisfying the grouping calibration performance parameter, adjust the initial adjustment parameter to obtain a new adjustment parameter, and re-execute the steps of adjusting the exhaust gas recirculation rate of the test cylinder group based on the new adjustment parameter, and monitoring the adjusted exhaust gas recirculation rate to obtain the monitoring performance parameter until the monitoring performance parameter satisfies the grouping calibration performance parameter, and determine that the new adjustment parameter is the first test adjustment parameter.

[0092] Further, the second determining module is further configured to: in response to the monitoring performance parameter being less than or equal to the grouping calibration performance parameter, increase the initial adjustment parameter based on a preset adjustment strategy and a preset adjustment parameter to obtain a new adjustment parameter; in response to the monitoring performance parameter being greater than the grouping calibration performance parameter, decrease the initial adjustment parameter based on the preset adjustment strategy and the preset adjustment parameter to obtain a new adjustment parameter.

[0093] Further, in the case that the cylinder group comprises one cylinder, the first determining module is further configured to: obtain a second target mapping relationship corresponding to the cylinder, wherein the second target mapping relationship is used to represent a mapping relationship between different performance parameters and different adjustment parameters of the cylinder; and determine the target adjustment parameter of the cylinder based on the second target mapping relationship of the cylinder and the target performance parameter of the cylinder.

[0094] Further, the device further comprises: a third obtaining module configured to obtain a second test performance parameter of any one of the test cylinders in the test engine during the operation of the test engine, wherein the parameter type of the second test performance parameter is the same as that of the target performance parameter of the cylinder, and the parameter value of the second test performance parameter comprises the parameter value of the target performance parameter of the cylinder; a third determining module configured to determine a second test adjustment parameter based on the second test performance parameter of any one of the test cylinders and a cylinder calibration performance parameter, wherein the cylinder calibration performance parameter is used to represent the exhaust gas recirculation rate of any one of the test cylinders of the engine in a preset state, the parameter type of the second test adjustment parameter is the same as that of the target adjustment parameter, and the parameter value of the second test adjustment parameter comprises the parameter value of the target adjustment parameter; and a second constructing module configured to construct a second target mapping relationship based on the second test performance parameter and the second test adjustment parameter.

[0095] Further, the apparatus further includes a fourth obtaining module configured to obtain intake states of the plurality of cylinders, wherein the intake state is used to represent an intake amount of the cylinder; and a second grouping module configured to group the plurality of cylinders based on the intake states and a preset grouping condition, to obtain at least two cylinder groups.

[0096] Further, the fourth obtaining module is further configured to determine a first distance between any one of the cylinders and an intake manifold inlet of the engine, wherein the first distances between different cylinders and the intake manifold inlet are different; and determine the intake state of any one of the cylinders based on the first distance corresponding to the cylinder.

[0097] Embodiments of the present application further provide a vehicle, including a memory storing an executable program; and a processor configured to run the program, wherein the program is configured to execute the method in the embodiments of the present application when running.

[0098] Embodiments of the present application further provide a computer readable storage medium, including a stored executable program, wherein the computer readable storage medium is configured to control a device where the computer readable storage medium is located to execute the method in the embodiments of the present application when the executable program runs.

[0099] Embodiments of the present application further provide a computer program product, including a computer program, wherein the computer program is configured to implement the method in the embodiments of the present application when executed by a processor.

[0100] Embodiments of the present application further provide a computer program product, including a non-volatile computer readable storage medium, wherein the non-volatile computer readable storage medium is configured to store a computer program, and the computer program is configured to implement the method in the embodiments of the present application when executed by a processor.

[0101] Embodiments of the present application further provide a computer program, wherein the computer program is configured to implement the method in the embodiments of the present application when executed by a processor.

[0102] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0103] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0104] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented by other means. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units can be a logical function division, and actual implementation can have another division mode, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between units or modules, which can be electrical or other forms.

[0105] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0106] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0107] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0108] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. An intake control method for an engine, characterized in that, The engine is equipped with an asymmetric turbocharger, and the method includes: Obtain target performance parameters for multiple cylinders in the engine, wherein the multiple cylinders are divided into at least two cylinder groups, and the target performance parameters include at least: exhaust gas recirculation degree; Based on the target performance parameters of at least one cylinder in the same cylinder group, determine the target adjustment parameters of the cylinder group; Based on the target adjustment parameters, the exhaust gas recirculation degree of at least one cylinder in the cylinder group is adjusted so that the multiple cylinders have the same exhaust gas recirculation degree.

2. The intake control method for an engine according to claim 1, characterized in that, When the cylinder bank contains at least two cylinders, the target adjustment parameters of the cylinder bank are determined based on the target performance parameters of at least one cylinder within the same cylinder bank, including: Obtain the first target mapping relationship corresponding to the cylinder group, wherein the first target mapping relationship is used to characterize the mapping relationship between different performance parameters of the at least two cylinders and different adjustment parameters of the cylinder group; The target adjustment parameters are determined based on the first target mapping relationship and the target performance parameters of the at least one cylinder.

3. The intake control method for an engine according to claim 2, characterized in that, The method further includes: Multiple test cylinders in the test engine are grouped to obtain test cylinder groups, wherein the type of the test engine is the same as the type of engine, and the division method of the test cylinder groups is the same as the division method of the cylinder groups; During the operation of the test engine, first test performance parameters of at least two test cylinder groups in the test cylinder group are acquired, wherein the parameter type of the first test performance parameter is the same as the parameter type of the target performance parameter, and the parameter value of the first test performance parameter includes the parameter value of the target performance parameter of the at least one cylinder. Based on the first test performance parameters and group calibration performance parameters of the at least two test cylinder groups, a first test adjustment parameter of the test cylinder group is determined, wherein the group calibration performance parameters are used to characterize the exhaust gas recirculation degree of the test cylinder group when the engine is in a preset state, the parameter type of the first test adjustment parameter is the same as the parameter type of the target adjustment parameter, and the parameter value of the first test adjustment parameter includes the parameter value of the target adjustment parameter. Based on the first test performance parameters and the first test adjustment parameters, the first target mapping relationship is constructed.

4. The intake control method for an engine according to claim 3, characterized in that, Based on the first test performance parameters and group calibration performance parameters of the at least two test cylinder groups, the first test adjustment parameters of the test cylinder groups are determined, including: In response to the first test performance parameter of the test cylinder group not meeting the group calibration performance parameter, the initial adjustment parameters of the test cylinder group are constructed; Based on the initial adjustment parameters, the exhaust gas recirculation degree of the test cylinder group is adjusted, and the adjusted exhaust gas recirculation degree is monitored to obtain the monitoring performance parameters. In response to the monitoring performance parameters satisfying the group calibration performance parameters, the initial adjustment parameter is determined to be the first test adjustment parameter; In response to the monitoring performance parameter not meeting the group calibration performance parameter, the initial adjustment parameter is adjusted to obtain a new adjustment parameter, and the steps of adjusting the exhaust gas recirculation degree of the test cylinder group based on the new adjustment parameter and monitoring the adjusted exhaust gas recirculation degree to obtain the monitoring performance parameter are repeated until the monitoring performance parameter meets the group calibration performance parameter, and the new adjustment parameter is determined as the first test adjustment parameter.

5. The intake control method for an engine according to claim 4, characterized in that, The initial adjustment parameters are adjusted to obtain new adjustment parameters, including: In response to the monitoring performance parameter being less than or equal to the group calibration performance parameter, the initial adjustment parameter is increased based on a preset adjustment strategy and preset adjustment parameters to obtain the new adjustment parameter; In response to the monitoring performance parameter being greater than the group calibration performance parameter, the initial adjustment parameter is reduced based on the preset adjustment strategy and the preset adjustment parameter to obtain the new adjustment parameter.

6. The intake control method for an engine according to claim 1, characterized in that, When the cylinder bank includes one cylinder, the target adjustment parameters of the cylinder bank are determined based on the target performance parameters of at least one cylinder within the same cylinder bank, including: Obtain the second target mapping relationship corresponding to the cylinder, wherein the second target mapping relationship is used to characterize the mapping relationship between different performance parameters and different adjustment parameters of the cylinder; Based on the second target mapping relationship of the cylinder and the target performance parameters of the cylinder, the target adjustment parameters of the cylinder are determined.

7. The intake control method for an engine according to claim 6, characterized in that, The method further includes: During the operation of the test engine, a second test performance parameter of any test cylinder in the test engine is obtained, wherein the parameter type of the second test performance parameter is the same as the parameter type of the target performance parameter of the cylinder, and the parameter value of the second test performance parameter includes the parameter value of the target performance parameter of the cylinder. Based on the second test performance parameter and cylinder calibration performance parameter of any one of the test cylinders, a second test adjustment parameter is determined, wherein the cylinder calibration performance parameter is used to characterize the exhaust gas recirculation degree of any one of the test cylinders when the engine is in a preset state, the parameter type of the second test adjustment parameter is the same as the parameter type of the target adjustment parameter, and the parameter value of the second test adjustment parameter includes the parameter value of the target adjustment parameter. Based on the second test performance parameters and the second test adjustment parameters, the second target mapping relationship is constructed.

8. The intake control method for an engine according to any one of claims 1 to 7, characterized in that, The method further includes: The intake state of the plurality of cylinders is obtained, wherein the intake state is used to characterize the intake volume of the cylinder; Based on the intake state and preset grouping conditions, the plurality of cylinders are grouped to obtain at least two cylinder groups.

9. The intake control method for an engine according to claim 8, characterized in that, Obtaining the intake status of the plurality of cylinders includes: Determine a first distance between any cylinder and the intake manifold inlet of the engine, wherein different cylinders have different first distances from the intake manifold inlet; Based on the first distance corresponding to any one of the cylinders, the intake state of any one of the cylinders is determined.

10. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 9.

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