Methods, apparatus, equipment and storage medium for determining the target opening degree of a mixing valve

Abstract

This application discloses a method, apparatus, device, and storage medium for determining the target opening degree of a mixing valve, relating to the field of engine control technology. The method for determining the target opening degree of a mixing valve includes: determining a first correction coefficient and a second correction coefficient for the current rate of change based on throttle gas pressure data and / or engine speed data; determining a current learning coefficient based on mixing valve state information, turbocharger state information, and engine state information; determining a rate of change multiplication correction coefficient based on the first correction coefficient, the second correction coefficient, and the current learning coefficient; determining the target opening degree change rate of the mixing valve based on the rate of change multiplication correction coefficient; and determining the target mixing valve opening degree based on the target opening degree change rate. This achieves control optimization of the mixing valve opening degree change rate, thereby ensuring the control accuracy of the target opening degree of the mixing valve.

Description

Technical Field

[0001] This application relates to the field of engine control technology, and in particular to a method, apparatus, equipment and storage medium for determining the target opening degree of a mixing valve. Background Technology

[0002] Exhaust gas recirculation (EGR) draws exhaust gas from the exhaust system and introduces it into the intake system. Studies have shown that EGR systems offer advantages in improving emissions, reducing fuel consumption, and enhancing anti-knock capabilities. In low-pressure EGR systems, the control of the mixing valve is particularly important for improving the EGR rate.

[0003] However, when the existing solution corrects the target opening of the mixing valve based on the operating parameters, it does not optimize the rate of change of the mixing valve opening from the perspective of improving the stability of intake pressure control during the process of the mixing valve changing from fully open to partially open.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this application is to provide a method, apparatus, device, and storage medium for determining the target opening degree of a mixing valve, aiming to solve the technical problem of how to optimize the rate of change of the opening degree of the mixing valve from the perspective of improving the stability of intake pressure control, so as to ensure the control accuracy of the target opening degree of the mixing valve.

[0006] To achieve the above objectives, this application proposes a method for determining the target opening degree of a mixing valve, the method comprising:

[0007] Acquire throttle valve gas pressure data and engine speed data, and determine a first correction coefficient and a second correction coefficient for the current rate of change based on the throttle valve gas pressure data and / or the engine speed data;

[0008] Acquire the state information of the mixing valve, the turbocharger, and the engine, and determine the current learning coefficient based on the state information of the mixing valve, the turbocharger, and the engine.

[0009] The rate of change multiplication correction coefficient is determined based on the current rate of change first correction coefficient, the current rate of change second correction coefficient, and the current learning coefficient;

[0010] The target opening change rate of the mixing valve is determined based on the change rate multiplication correction coefficient, and the target mixing valve opening is determined based on the target opening change rate of the mixing valve.

[0011] In one embodiment, the throttle valve gas pressure data includes throttle valve outlet pressure data and throttle valve inlet pressure data;

[0012] The step of determining the first correction factor and the second correction factor of the current rate of change based on the throttle gas pressure data and / or the engine speed data includes:

[0013] The first pressure ratio data and the second pressure ratio data are determined based on the throttle outlet pressure data and the throttle inlet pressure data;

[0014] A first correction coefficient for the current rate of change is determined based on the first pressure ratio data and the engine speed data;

[0015] The second correction factor for the current rate of change is determined based on the second pressure ratio data.

[0016] In one embodiment, the step of determining the first correction coefficient for the current rate of change based on the first pressure ratio data and the engine speed data includes:

[0017] First pressure ratio fluctuation data and engine speed fluctuation data are determined based on the first pressure ratio data and the engine speed data;

[0018] When the first pressure ratio fluctuation data and the engine speed fluctuation data meet the first preset fluctuation condition, the first correction coefficient of the historical change rate is obtained, and the first correction coefficient of the historical change rate is used as the first correction coefficient of the current change rate.

[0019] In one embodiment, after the step of obtaining a historical rate of change first correction coefficient when the first pressure ratio fluctuation data and the engine speed fluctuation data meet a first preset fluctuation condition, and using the historical rate of change first correction coefficient as the current rate of change first correction coefficient, the method further includes:

[0020] When the first pressure ratio fluctuation data and the engine speed fluctuation data do not meet the first preset fluctuation condition, the current first pressure ratio data is obtained based on the first pressure ratio data, and the current engine speed data is obtained based on the engine speed data;

[0021] The first correction coefficient for the current rate of change is determined based on the current first pressure ratio data and the current engine speed data.

[0022] In one embodiment, the step of determining the second correction coefficient for the current rate of change based on the second pressure ratio data includes:

[0023] The second pressure ratio fluctuation data is determined based on the second pressure ratio data;

[0024] When the second pressure ratio fluctuation data meets the second preset fluctuation condition, the historical change rate correction second coefficient is obtained, and the historical change rate correction second coefficient is used as the current change rate second correction coefficient.

[0025] In one embodiment, after the step of obtaining a historical rate of change correction second coefficient when the second pressure ratio fluctuation data meets a second preset fluctuation condition, and using the historical rate of change correction second coefficient as the current rate of change second correction coefficient, the method further includes:

[0026] When the second pressure ratio fluctuation data does not meet the second preset fluctuation condition, the current second pressure ratio data is obtained based on the second pressure ratio data;

[0027] The second correction coefficient for the current rate of change is determined based on the current second pressure ratio data.

[0028] In one embodiment, the step of determining the current learning coefficient based on the mixing valve state information, the turbocharger state information, and the engine state information includes:

[0029] When the mixing valve status information, the turbocharger status information, and the engine status information meet the first preset condition, EGR rate data, boost pressure data, and change rate difference data are acquired.

[0030] When the difference between the boost pressure data and the rate of change data meets the second preset condition, the current learning coefficient is determined based on the throttle gas pressure data and the EGR rate data.

[0031] In one embodiment, the step of determining the current learning coefficient based on the throttle valve gas pressure data and the EGR rate data when the boost pressure data and the difference in rate of change data meet a second preset condition includes:

[0032] When the boost pressure data and the difference in the rate of change data meet the second preset condition, the intake pressure responsiveness and EGR rate responsiveness are evaluated based on the throttle valve gas pressure data and the EGR rate data to obtain the intake pressure responsiveness evaluation result and the EGR rate responsiveness evaluation result.

[0033] The current learning coefficient is determined based on the intake pressure responsiveness assessment results and the EGR rate responsiveness assessment results.

[0034] In one embodiment, the step of determining the current learning coefficient based on the intake pressure responsiveness assessment result and the EGR rate responsiveness assessment result includes:

[0035] When the intake pressure responsiveness evaluation result is that the intake pressure responsiveness meets the preset first response condition, the learning coefficient increment is determined based on the EGR rate responsiveness evaluation result, and the current learning coefficient is determined based on the learning coefficient increment.

[0036] When the intake pressure responsiveness evaluation result indicates that the intake pressure responsiveness meets the preset second response condition, the learning coefficient reduction value is determined based on the EGR rate responsiveness evaluation result, and the current learning coefficient is determined based on the learning coefficient reduction value.

[0037] Furthermore, to achieve the above objectives, this application also proposes a target opening degree determination device for a mixing valve, the target opening degree determination device for a mixing valve comprising:

[0038] The first coefficient determination module is used to acquire throttle valve gas pressure data and engine speed data, and determine the first correction coefficient and the second correction coefficient of the current rate of change based on the throttle valve gas pressure data and / or the engine speed data.

[0039] The second coefficient determination module is used to acquire the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine, and to determine the current learning coefficient based on the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine.

[0040] The third coefficient determination module is used to determine the rate of change multiplication correction coefficient based on the current rate of change first correction coefficient, the current rate of change second correction coefficient, and the current learning coefficient;

[0041] The target opening determination module is used to determine the target opening change rate of the mixing valve based on the change rate multiplication correction coefficient, and to determine the target mixing valve opening based on the target opening change rate of the mixing valve.

[0042] In addition, to achieve the above objectives, this application also proposes a device for determining the target opening degree of a hybrid valve, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the method for determining the target opening degree of a hybrid valve as described above.

[0043] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the method for determining the target opening of the mixing valve as described above.

[0044] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the method for determining the target opening of a mixing valve as described above.

[0045] One or more technical solutions proposed in this application have at least the following technical effects:

[0046] The system acquires throttle valve gas pressure data and engine speed data, and determines a first correction coefficient and a second correction coefficient for the current rate of change based on the throttle valve gas pressure data and / or the engine speed data. It also acquires mixing valve status information, turbocharger status information, and engine status information, and determines a current learning coefficient based on these information. A rate of change multiplication correction coefficient is then determined based on the first, second, and current learning coefficients. Finally, a target mixing valve opening rate of change is determined based on the rate of change multiplication correction coefficient, and a target mixing valve opening is determined based on this target opening rate of change. By optimizing the mixing valve rate of change using throttle valve gas pressure data such as actual throttle valve inlet pressure, actual throttle valve outlet pressure, and target throttle valve outlet pressure, and by learning the mixing valve opening rate of change correction coefficient based on the mixing valve status, turbocharger status, and engine status, the system optimizes the control of the mixing valve opening rate of change from the perspective of intake pressure control stability, thereby ensuring the control accuracy of the target mixing valve opening. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 This is a flowchart illustrating an embodiment of the method for determining the target opening degree of a mixing valve in this application.

[0050] Figure 2 This is a low-pressure EGR system architecture diagram provided in Embodiment 1 of the method for determining the target opening degree of the mixing valve in this application;

[0051] Figure 3 This is a flowchart illustrating Embodiment 2 of the method for determining the target opening degree of a mixing valve in this application.

[0052] Figure 4 A simplified flowchart illustrating the method for determining the target opening degree of a mixing valve provided in Embodiment 2 of this application;

[0053] Figure 5 This is a schematic diagram of the module structure of the mixing valve target opening degree determination device according to an embodiment of this application;

[0054] Figure 6This is a schematic diagram of the equipment structure of the hardware operating environment involved in the method for determining the target opening degree of the mixing valve in the embodiments of this application.

[0055] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0057] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0058] The main solution of this application embodiment is as follows: acquire throttle valve gas pressure data and engine speed data, and determine a first correction coefficient and a second correction coefficient for the current rate of change based on the throttle valve gas pressure data and / or the engine speed data; acquire mixing valve status information, turbocharger status information and engine status information, and determine a current learning coefficient based on the mixing valve status information, turbocharger status information and engine status information; determine a rate of change multiplication correction coefficient based on the first correction coefficient, the second correction coefficient and the current learning coefficient; determine a target opening rate of change of the mixing valve based on the rate of change multiplication correction coefficient, and determine a target mixing valve opening based on the target opening rate of change of the mixing valve.

[0059] In this embodiment, for ease of description, the following description will focus on the device for determining the target opening degree of the mixing valve.

[0060] Exhaust gas recirculation (EGR) draws exhaust gas from the exhaust system and introduces it into the intake system. Studies have shown that EGR systems offer advantages in improving emissions, reducing fuel consumption, and enhancing anti-knock capabilities. In low-pressure EGR systems, the control of the mixing valve is particularly important for improving the EGR rate.

[0061] This application provides a solution that optimizes the rate of change of the mixing valve opening to improve the stability of intake pressure control during the process of the mixing valve being fully open to partially open, so as to ensure the control accuracy of the target opening of the mixing valve.

[0062] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as a mixing valve target opening degree determination device. The following description uses a mixing valve target opening degree determination device as an example to illustrate this embodiment and the subsequent embodiments.

[0063] Based on this, embodiments of this application provide a method for determining the target opening degree of a mixing valve, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the method for determining the target opening degree of a mixing valve according to this application.

[0064] In this embodiment, the method for determining the target opening degree of the mixing valve includes steps S10 to S40:

[0065] Step S10: Obtain throttle valve gas pressure data and engine speed data, and determine the first correction coefficient and the second correction coefficient of the current rate of change based on the throttle valve gas pressure data and / or the engine speed data;

[0066] It should be noted that the method for determining the target opening degree of the mixing valve in this application is applied to low-pressure EGR systems. Please refer to [reference needed]. Figure 2 , Figure 2 This is a low-pressure EGR system architecture diagram provided for Embodiment 1 of the method for determining the target opening degree of the mixing valve in this application. Figure 2 As shown, the low-pressure EGR system includes: an air filter, a mixing valve, a turbocharger compressor, a throttle body, an engine, a turbocharger turbine, a catalytic converter, a particulate filter, an EGR cooler, an EGR valve, an EGR temperature sensor, an EGR differential pressure sensor, a flow meter, and a linear oxygen sensor. The turbocharger compressor compresses fresh air for boost; the turbocharger turbine controls the turbine's efficiency by adjusting the opening of the turbocharger's exhaust bypass valve, thus achieving different boost capacities. Compared to the non-low-pressure EGR system, the low-pressure EGR system adds the following components: EGR cooler, EGR temperature sensor, EGR valve, EGR differential pressure sensor, mixing valve, flow meter, and oxygen sensor. The flow meter, installed between the air filter and the mixing valve, detects the flow rate of fresh air entering the engine. The mixing valve regulates the pressure at the EGR valve outlet, increasing the pressure differential across the EGR valve and improving the EGR rate. The oxygen sensor, installed between the compressor and the throttle valve, near the throttle valve, detects the flow rate of the air-fuel mixture entering the cylinder. The EGR cooler cools the exhaust gas, facilitating increased exhaust gas flow and reduced exhaust gas temperature. The EGR valve throttles the exhaust gas flow into the cylinder. The EGR temperature sensor detects the temperature of the exhaust gas entering the EGR valve. The EGR differential pressure sensor detects the pressure at the EGR inlet and outlet.

[0067] It should be noted that throttle valve gas pressure data includes throttle valve outlet pressure data and throttle valve inlet pressure data. The throttle valve outlet pressure data refers to the actual gas pressure p after the throttle valve. AftThrAct and the target gas pressure p after the throttle valve AftThrDesd Throttle inlet pressure data refers to the actual gas pressure p before the throttle valve. BfThrActThe engine speed data refers to the engine speed n. This is based on the actual gas pressure p after the throttle valve. AftThrAct Target gas pressure p after throttle valve AftThrDesd Actual gas pressure p before throttle valve BfThrAct And the engine speed n can be used to calculate two correction factors, namely the first correction factor for the current rate of change. and the second correction factor for the current rate of change Used to adjust the rate of change of the opening of the mixing valve.

[0068] In one feasible implementation, step S10, which involves determining the first correction coefficient and the second correction coefficient of the current rate of change based on the throttle valve gas pressure data and / or the engine speed data, may include steps S11 to S13:

[0069] Step S11: Determine the first pressure ratio data and the second pressure ratio data based on the throttle outlet pressure data and the throttle inlet pressure data;

[0070] It should be noted that the throttle outlet pressure data includes the actual gas pressure p after the throttle valve. AftThrAct and the target gas pressure p after the throttle valve AftThrDesd Throttle inlet pressure includes the actual gas pressure p before the throttle valve. BfThrAct The first pressure ratio data refers to the actual gas pressure p after the throttle valve. AftThrAct and the target gas pressure p after the throttle valve AftThrDesd ratio The second pressure ratio data refers to the actual gas pressure p after the throttle valve. AftThrAct and the actual gas pressure p before the throttle valve BfThrAct ratio

[0071] Step S12: Determine the first correction coefficient for the current rate of change based on the first pressure ratio data and the engine speed data;

[0072] It should be understood that the current first correction factor for the rate of change is based on the first pressure ratio data. The correction factor is determined by the engine speed n, and used express.

[0073] It should be noted that the pressure ratio The smaller the value, the slower the intake pressure control response. To improve intake pressure control accuracy, it is necessary to reduce the rate of change of the mixing valve opening, thereby increasing the gas flow into the turbocharger compressor, increasing the throttle inlet pressure, and increasing the actual intake pressure; pressure ratio. If the value is too high, it indicates that the intake pressure control response is too fast. To improve the accuracy of intake pressure control, it is necessary to increase the rate of change of the mixing valve opening, thereby reducing the gas flow entering the turbocharger compressor as quickly as possible, reducing the throttle inlet pressure, and reducing the actual intake pressure. In this embodiment, at different engine speeds n, When the value is 1, different pressure ratios can be adjusted. Get Ensure that during the transition from fully open to partially open mixing valve, the difference between the actual intake pressure and the target intake pressure does not exceed ±3 kPa for more than 0.5 s continuously.

[0074] In one feasible implementation, step S12 may include: determining first pressure ratio fluctuation data and engine speed fluctuation data based on the first pressure ratio data and the engine speed data; when the first pressure ratio fluctuation data and the engine speed fluctuation data meet a first preset fluctuation condition, obtaining a first correction coefficient for historical change rate, and using the first correction coefficient for historical change rate as the first correction coefficient for current change rate.

[0075] It should be noted that the first pressure ratio data includes historical first pressure ratio data and current first pressure ratio data. The historical first pressure ratio data refers to the pressure ratio in the previous sampling period. The current first pressure ratio data refers to the pressure ratio in this sampling period. The first pressure ratio fluctuation data refers to the pressure ratio during the current sampling period. Pressure ratio compared to the previous sampling period The difference, engine speed fluctuation data refers to the difference between the engine speed in the current sampling period and the engine speed in the previous sampling period.

[0076] It should be understood that, in order to avoid engine speed n and Too frequent fluctuations lead to If the adjustment is too large, causing excessive changes in the multiplication correction coefficient r1 for the rate of change of the mixing valve opening, resulting in excessive fluctuations in the mixing valve opening control and poor mixing valve control stability, the first correction coefficient for the rate of change will not be applied when the first pressure ratio fluctuation data and engine speed fluctuation data meet the first preset fluctuation condition. Instead of updating, it retrieves the first correction coefficient of the rate of change determined in the previous sampling period. That is, the first correction factor for the historical rate of change is used as the first correction factor for the current rate of change.

[0077] In specific implementation, the first pressure ratio fluctuation data and engine speed fluctuation data satisfying the first preset fluctuation condition means that: the engine speed fluctuation n (the difference between the engine speed in the current sampling period and the engine speed in the previous sampling period, with the sampling period set to 10ms in this embodiment) does not exceed a preset value (±40rpm in this embodiment) and Fluctuation (pressure ratio during this sampling period) Pressure ratio compared to the previous sampling period The difference (the sampling period is 10ms in this embodiment) does not exceed the preset value (±0.1 in this embodiment).

[0078] In another feasible implementation, step S12 further includes: when the first pressure ratio fluctuation data and the engine speed fluctuation data do not meet the first preset fluctuation condition, obtaining the current first pressure ratio data based on the first pressure ratio data, and obtaining the current engine speed data based on the engine speed data; and determining the current rate of change first correction coefficient based on the current first pressure ratio data and the current engine speed data.

[0079] It should be understood that when the first pressure ratio fluctuation data does not meet the first preset fluctuation condition, the current first pressure ratio data will be used as the basis for adjustment. First correction factor for update rate of change Obtain the first correction factor for the current rate of change.

[0080] Step S13: Determine the second correction coefficient for the current rate of change based on the second pressure ratio data.

[0081] It should be understood that the current second correction factor for the rate of change is based on the second pressure ratio data. The determined correction factor is used express.

[0082] It should be noted that after calibration Afterwards, adjustments will be made. Determine In pressure ratio The larger the value, the smaller the pressure difference between the throttle inlet and outlet. This necessitates reducing the rate of change of the mixing valve opening to mitigate the impact of intake pressure reduction by slowing the decrease in throttle inlet pressure. Similarly, it ensures that the difference between the actual and target intake pressure does not exceed ±3 kPa for more than 0.5 seconds during the transition from fully open to partially open mixing valve. Specifically, in... When it is 1, The value is 0, mainly because the parameter of the ratio of throttle outlet pressure to inlet pressure is only adjusted when the throttle inlet pressure response is poor. Otherwise, no adjustment is needed to avoid affecting the accuracy of the EGR rate response (ensuring that the continuous time when the difference between the target EGR rate and the actual EGR rate exceeds the preset value ±0.15 does not exceed 0.3s).

[0083] In one feasible implementation, step S13 may include: determining second pressure ratio fluctuation data based on the second pressure ratio data; when the second pressure ratio fluctuation data meets the second preset fluctuation condition, obtaining the historical rate of change correction second coefficient, and using the historical rate of change correction second coefficient as the current rate of change second correction coefficient.

[0084] It should be noted that the second pressure ratio data includes historical second pressure ratio data and current second pressure ratio data. The historical second pressure ratio data refers to the pressure ratio in the previous sampling period. The current second pressure ratio data refers to the pressure ratio during this sampling period. The second pressure ratio fluctuation data refers to the pressure ratio during this sampling period. Pressure ratio compared to the previous sampling period difference.

[0085] It should be understood that, in order to avoid Too frequent fluctuations lead to If the adjustment is too large, causing an excessive change in the multiplication correction coefficient r1 for the rate of change of the mixing valve opening, resulting in excessive fluctuations in the mixing valve opening control and poor mixing valve control stability, the second correction coefficient for the rate of change will not be adjusted when the second pressure ratio fluctuation data meets the second preset fluctuation condition. Instead of updating, it retrieves the second correction coefficient for the historical rate of change, which is the second correction coefficient for the rate of change determined in the previous sampling period. It is used as the second correction factor for the current rate of change.

[0086] In practical implementation, the second pressure ratio fluctuation data satisfying the second preset fluctuation condition means: Fluctuation (pressure ratio during this sampling period) Pressure ratio compared to the previous sampling period The difference (the sampling period is 10ms in this embodiment) does not exceed the preset value (±0.03 in this embodiment).

[0087] In another feasible implementation, step S13 may further include: when the second pressure ratio fluctuation data does not meet the second preset fluctuation condition, obtaining the current second pressure ratio data based on the second pressure ratio data; and determining the current rate of change second correction coefficient based on the current second pressure ratio data.

[0088] It should be understood that when the second pressure ratio fluctuation data does not meet the second preset fluctuation condition, the current second pressure ratio data will be used as the basis for adjustment. Second correction coefficient for update rate of change The second correction factor for the current rate of change is obtained.

[0089] Step S20: Obtain the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine, and determine the current learning coefficient based on the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine;

[0090] It should be noted that the current learning coefficient refers to the learning coefficient r1 of the multiplication correction coefficient r1 for the rate of change of the mixing valve opening. Lrn Its default value is 0, and it can be saved after the vehicle is powered off. The mixing valve status information refers to the current opening or position of the mixing valve, the turbocharger status information refers to the working status of the turbocharger, and the engine status information includes the engine target intake pressure change rate information and the engine mileage information corresponding to the learning coefficient not being updated.

[0091] It should be understood that when the mixing valve status information, turbocharger status information, and engine status information do not meet the preset conditions, the historical learning coefficient r of the mixing valve opening change rate multiplication correction coefficient r1 will be obtained. Lrn (z) will be the historical learning coefficient r Lrn (z) is the current learning coefficient r Lrn That is, r Lrn =r Lrn (z)+0.1, where the historical learning coefficient r Lrn (z) refers to the self-learning correction coefficient obtained from the previous learning. When the mixing valve state information, turbocharger state information, and engine state information meet preset conditions, the intake pressure response and EGR rate response of the low-pressure EGR system are evaluated, and the historical learning coefficient r is adjusted based on the evaluation results. Lrn (z) is updated to obtain the current learning coefficient r. Lrn .

[0092] Step S30: Determine the rate of change multiplication correction coefficient based on the current rate of change first correction coefficient, the current rate of change second correction coefficient, and the current learning coefficient;

[0093] It should be understood that, in determining the first correction factor for the current rate of change Second correction factor for current rate of change and the current learning coefficient r Lrn Then, a comprehensive rate of change multiplication correction coefficient r1 can be calculated. This coefficient is used to finely adjust the target opening rate of the mixing valve in order to achieve more precise control over the target mixing valve opening.

[0094] For example, the formula for calculating the rate of change multiplication correction factor r1 is as follows:

[0095]

[0096] Step S40: Determine the target opening change rate of the mixing valve based on the change rate multiplication correction coefficient, and determine the target mixing valve opening based on the target opening change rate of the mixing valve.

[0097] It should be understood that the target opening change rate is used to indicate how quickly the mixing valve opening should be adjusted to achieve the target opening. After obtaining the change rate multiplication correction factor r1, the final mixing valve opening change rate, i.e., the target opening change rate, can be determined based on the change rate multiplication correction factor r1. The ideal opening of the mixing valve, i.e., the target mixing valve opening, is then calculated based on the target opening change rate to optimize the engine's intake efficiency and combustion performance while meeting emission requirements.

[0098] This embodiment provides a method for determining the target opening degree of a mixing valve. The method involves acquiring throttle valve gas pressure data and engine speed data, and determining a first correction coefficient and a second correction coefficient for the current rate of change based on the throttle valve gas pressure data and / or the engine speed data. It also involves acquiring mixing valve state information, turbocharger state information, and engine state information, and determining a current learning coefficient based on these information. Furthermore, it involves determining a rate of change multiplication correction coefficient based on the first correction coefficient, the second correction coefficient, and the current learning coefficient; determining the target opening degree change rate of the mixing valve based on the rate of change multiplication correction coefficient; and finally, determining the target mixing valve opening degree based on the target opening degree change rate. By optimizing the mixing valve change rate using throttle gas pressure data such as actual throttle inlet pressure, actual throttle outlet pressure, and target throttle outlet pressure, and by learning the correction coefficient for the mixing valve opening change rate based on the mixing valve status, turbocharger status, and engine status, the control optimization of the mixing valve opening change rate is achieved from the perspective of intake pressure control stability, thereby ensuring the control accuracy of the target opening of the mixing valve.

[0099] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 The step S20, which determines the current learning coefficient based on the mixing valve state information, the turbocharger state information, and the engine state information, may include steps S21 to S22:

[0100] Step S21: When the mixing valve status information, the turbocharger status information, and the engine status information meet the first preset condition, acquire EGR rate data, boost pressure data, and change rate difference data.

[0101] It should be understood that the purpose of updating the learning coefficient of the multiplication correction factor r1 for the rate of change of the mixing valve opening is to improve the intake pressure responsiveness and EGR rate response accuracy during the control process. This is done after determining the current learning coefficient r1. Lrn When the learning coefficient update strategy is activated, it needs to be determined based on the mixing valve status information, turbocharger status information, and engine status information. If the mixing valve status information, turbocharger status information, and engine status information do not meet the first preset condition, the result is that the learning coefficient update strategy is not activated, and the historical learning coefficients are obtained and used as the current learning coefficients. If the mixing valve status information, turbocharger status information, and engine status information meet the first preset condition, the result is that the learning coefficient update strategy is activated, and EGR rate data, boost pressure data, and rate of change difference data are obtained to update the learning coefficients according to the learning coefficient update strategy to obtain the current learning coefficients.

[0102] It should be noted that the first preset condition for the mixing valve status information, turbocharger status information and engine status information to meet the following conditions (the engine is in a large transient condition) is met simultaneously: (1) the mixing valve is in the transition process from fully open to partially open; (2) the turbocharger is in the closed-loop control activation state; (3) the absolute value of the engine target intake pressure change rate exceeds the preset value, which is 25 kPa / 10 ms in this embodiment; (4) the engine mileage corresponding to the learning coefficient not being updated exceeds the preset value, which is 20,000 kilometers in this embodiment.

[0103] Step S22: When the boost pressure data and the difference in rate of change data meet the second preset condition, determine the current learning coefficient based on the throttle gas pressure data and the EGR rate data.

[0104] It should be noted that when the learning coefficient update strategy is activated, the update method for the learning coefficients will be determined based on EGR rate data, boost pressure data, and rate of change difference data to determine the current learning coefficients. Here, boost pressure data refers to the difference between the target boost pressure and the actual boost pressure, and the rate of change difference data refers to dpct. MGVNew -dpct MGVRaw The ratio of . Among them, during the transition from fully open to partially open of the mixing valve, the final rate of change of the mixing valve opening, dpct. MGVNew =dpct MGVRaw ×r1.

[0105] Additionally, it should be noted that the pressure difference data and the rate of change difference data satisfying the second preset condition means that the following conditions are met simultaneously: (1) the difference between the target pressure and the actual pressure does not exceed a preset value, which is ±2 kPa in this embodiment; (2) dpct MGVNew -dpct MGVRaw The ratio does not exceed the preset value; in this embodiment, it is -15% / 10ms.

[0106] It should be understood that when the difference between the boost pressure data and the rate of change data meets the second preset condition, the learning coefficient will be updated based on the throttle valve gas pressure data and the EGR rate data to obtain the current learning coefficient.

[0107] In one feasible implementation, step S22 may include steps A31 to A32:

[0108] Step A31: When the boost pressure data and the difference in the rate of change data meet the second preset condition, the intake pressure responsiveness and EGR rate responsiveness are evaluated based on the throttle valve gas pressure data and the EGR rate data to obtain the intake pressure responsiveness evaluation result and the EGR rate responsiveness evaluation result.

[0109] It should be understood that when the difference between the boost pressure data and the rate of change data meets the second preset condition, the intake pressure responsiveness and EGR rate responsiveness will be evaluated based on the throttle valve gas pressure data and EGR rate data. The specific update method for the learning coefficients will be determined based on the evaluation results to obtain the current learning coefficients. Here, the throttle valve gas pressure data refers to the actual gas pressure p after the throttle valve. AftThrAct and the target gas pressure p after the throttle valve AftThrDesd EGR rate data refers to the difference between the target EGR rate and the actual EGR rate.

[0110] It should be noted that during the operation of the low-pressure EGR system, the actual gas pressure p after the throttle valve will be continuously collected. AftThrAct and the target gas pressure p after the throttle valve AftThrDesd ratio when When the continuous time exceeding the second preset pressure ratio exceeds the preset time interval, the counter CNT1 is updated; when When the continuous time with a pressure ratio less than the first preset value exceeds a preset time interval, counter CNT2 is updated. Specifically, the update method for CNT1 and CNT2 is to update only once per driving cycle, and only when the corresponding update conditions are met, and this is done within the learning coefficient r. Lrn It will immediately revert to 0 after the update.

[0111] Additionally, it should be noted that evaluating intake pressure responsiveness and EGR rate responsiveness based on throttle valve gas pressure data and EGR rate data includes: evaluating intake pressure responsiveness based on throttle valve gas pressure data; and evaluating EGR rate responsiveness based on EGR rate data.

[0112] The process of evaluating intake pressure responsiveness based on throttle valve gas pressure data is as follows: when CNT1 exceeds the pre-designed value, the intake pressure responsiveness evaluation result is determined to be too aggressive; when CNT2 exceeds the pre-designed value, the intake pressure responsiveness evaluation result is determined to be poor. The evaluation of EGR rate responsiveness based on EGR rate data includes: when the difference between the target EGR rate and the actual EGR rate does not exceed a preset first EGR rate difference value, the EGR rate responsiveness evaluation result is determined to be good; when the difference between the target EGR rate and the actual EGR rate exceeds a preset second EGR rate difference value, the EGR rate responsiveness evaluation result is determined to be poor.

[0113] Step A32: Determine the current learning coefficient based on the intake pressure responsiveness evaluation results and the EGR rate responsiveness evaluation results.

[0114] It should be understood that since the purpose of updating the learning coefficients is to improve the accuracy of intake pressure responsiveness and EGR rate response during the control process, the learning coefficients will only be updated to obtain the current learning coefficients when the intake pressure responsiveness assessment result is that the intake pressure responsiveness is too aggressive or poor, and the EGR rate response assessment result is that the EGR rate response is good or poor. Otherwise, the historical learning coefficients will be used as the current learning coefficients.

[0115] In one feasible implementation, step A32 may include: when the intake pressure responsiveness assessment result is that the intake pressure responsiveness meets a preset first response condition, determining an increase in the learning coefficient based on the EGR rate responsiveness assessment result, and determining a current learning coefficient based on the increase in the learning coefficient; when the intake pressure responsiveness assessment result is that the intake pressure responsiveness meets a preset second response condition, determining a decrease in the learning coefficient based on the EGR rate responsiveness assessment result, and determining a current learning coefficient based on the decrease in the learning coefficient.

[0116] It should be understood that an intake pressure responsiveness assessment result indicating that the intake pressure responsiveness meets the preset first response condition means that the intake pressure responsiveness is too aggressive. In this case, it is necessary to increase the learning coefficient r of the mixing valve opening change rate multiplication correction factor r1. LrnTo improve intake pressure responsiveness; an intake pressure responsiveness assessment result indicating that the intake pressure responsiveness meets the preset second response condition means the intake pressure responsiveness is poor. In this case, it is necessary to reduce the learning coefficient r of the mixing valve opening change rate multiplication correction factor r1. Lrn This avoids excessive overshoot in intake pressure response. The EGR rate response assessment results are used to determine the specific magnitude of the increase or decrease in the learning coefficient.

[0117] In practice, step S22 corresponds to five different scenarios:

[0118] The first scenario corresponds to a situation where the intake pressure response is poor, but the EGR rate response is good. It requires that the following conditions be met simultaneously: (1) The number of times the continuous time of less than the preset value (0.9) exceeds the preset value (0.8s in this embodiment) CNT1 exceeds the preset value (10 in this embodiment); (2) the difference between the target EGR rate and the actual EGR rate does not exceed the preset value, which is ±0.1 in this embodiment; (3) the difference between the target boost pressure and the actual boost pressure does not exceed the preset value, which is ±2kPa in this embodiment; (4) dpct MGVNew -dpct MGVRaw The ratio does not exceed the preset value. In this embodiment, it is taken as -15% / 10ms. It is necessary to further increase the learning coefficient rLrn of the multiplication correction coefficient r1 of the mixing valve opening change rate to improve the intake pressure responsiveness. Lrn =r Lrn (z)+0.1, where r Lrn (z) is the self-learning correction coefficient obtained from the previous learning.

[0119] The second scenario corresponds to a situation where the intake pressure response is too aggressive, but the EGR rate response is good. It requires that the following conditions be met simultaneously: (1) The number of times CNT1 exceeds the preset value (0.8s in this embodiment) for a continuous time less than the preset value (0.9); (2) the number of times CNT1 exceeds the preset value (10 in this embodiment) for a continuous time for the difference between the target EGR rate and the actual EGR rate to exceed the preset value (±0.15 in this embodiment) is 0.2s in this embodiment; (3) the number of times CNT1 exceeds the preset value (10 in this embodiment) for a continuous time ... MGVNew -dpct MGVRaw The ratio does not exceed a preset value; in this embodiment, it is taken as -15% / 10ms. At this point, it is necessary to appropriately reduce the learning coefficient rLrn of the mixing valve opening change rate multiplication correction coefficient r1 to avoid excessive overshoot in the intake pressure response. Lrn =r Lrn (z)-0.04, where r Lrn (z) is the self-learning correction coefficient obtained from the previous learning.

[0120] The third scenario corresponds to a situation where the intake pressure response is poor and the EGR rate response is poor. It requires that the following conditions be met simultaneously: (1) The number of times CNT1 exceeds the preset value (0.8s in this embodiment) for a continuous time less than the preset value (0.9); (2) the number of times CNT1 exceeds the preset value (10 in this embodiment) for a continuous time for the difference between the target EGR rate and the actual EGR rate to exceed the preset value (±0.15 in this embodiment) is 0.2s in this embodiment; (3) the number of times CNT1 exceeds the preset value (10 in this embodiment) for a continuous time ... MGVNew -dpct MGVRaw The ratio does not exceed a preset value; in this embodiment, it is taken as -15% / 10ms. At this point, it is necessary to slightly increase the learning coefficient rLrn of the multiplication correction coefficient r1 for the mixing valve opening change rate to improve the intake pressure responsiveness. Lrn =r Lrn (z)+0.03, where r Lrn (z) is the self-learning correction coefficient obtained from the previous learning.

[0121] The fourth scenario corresponds to a situation where the intake pressure response is too aggressive, but the EGR rate response is poor. It is necessary to simultaneously satisfy: (1) The number of times CNT2 exceeds the preset value (1.2) for a continuous time exceeding the preset value (0.8s in this embodiment) exceeds the preset value (10 in this embodiment); (2) The continuous time for the difference between the target EGR rate and the actual EGR rate to exceed the preset value (±0.15 in this embodiment) does not exceed the preset value, which is 0.2s in this embodiment; (3) The difference between the target boost pressure and the actual boost pressure does not exceed the preset value, which is ±2kPa in this embodiment; (4) dpct MGVNew -dpct MGVRaw The ratio does not exceed a preset value; in this embodiment, it is taken as -15% / 10ms. At this point, it is necessary to slightly reduce the learning coefficient r of the multiplication correction coefficient r1 for the rate of change of the mixing valve opening. L To avoid excessive overshoot in intake pressure response, Lrn =r Lrn (z)-0.02, where r Lrn (z) is the self-learning correction coefficient obtained from the previous learning.

[0122] The fifth scenario corresponds to all scenarios other than the first to fourth scenarios mentioned above. In this case, r Adapt =r Adapt (z), where r Lrn (z) is the self-learning correction coefficient obtained from the previous learning.

[0123] It should be understood that if the learning coefficient is updated, it will not be updated again in the current driving cycle.

[0124] For example, to help understand the implementation flow of the method for determining the target opening degree of the mixing valve obtained by combining this embodiment with the above embodiment one, please refer to... Figure 4 , Figure 4 A simplified flowchart of a method for determining the target opening of a mixing valve is provided. Specifically: throttle valve gas pressure data includes the actual throttle valve inlet pressure, the actual throttle valve outlet pressure, and the target throttle valve outlet pressure. Based on the actual throttle valve inlet pressure, the actual throttle valve outlet pressure, and the target throttle valve outlet pressure, a first correction coefficient and a second correction coefficient for the current rate of change are determined to optimize the mixing valve rate of change. After the mixing valve rate of change is learned and updated (i.e., the current learning coefficient is determined), a new value is obtained, and the final mixing valve opening rate of change is determined.

[0125] In this embodiment, when the mixing valve status information, the turbocharger status information, and the engine status information meet a first preset condition, EGR rate data, boost pressure data, and rate of change difference data are acquired; when the boost pressure data and the rate of change difference data meet a second preset condition, the current learning coefficient is determined based on the throttle gas pressure data and the EGR rate data. This achieves control optimization of the mixing valve opening change rate based on intake pressure control stability and EGR rate responsiveness control accuracy.

[0126] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the method for determining the target opening degree of the mixing valve in this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0127] This application also provides a device for determining the target opening degree of a mixing valve; please refer to [reference needed]. Figure 5 The target opening degree determination device for the mixing valve includes:

[0128] The coefficient first determination module 10 is used to acquire throttle valve gas pressure data and engine speed data, and determine the current rate of change first correction coefficient and the current rate of change second correction coefficient based on the throttle valve gas pressure data and / or the engine speed data;

[0129] The second coefficient determination module 20 is used to acquire the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine, and to determine the current learning coefficient based on the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine.

[0130] The third coefficient determination module 30 is used to determine the rate of change multiplication correction coefficient based on the current rate of change first correction coefficient, the current rate of change second correction coefficient, and the current learning coefficient;

[0131] The target opening determination module 40 is used to determine the target opening change rate of the mixing valve based on the change rate multiplication correction coefficient, and to determine the target mixing valve opening based on the target opening change rate of the mixing valve.

[0132] The mixing valve target opening determination device provided in this application, employing the mixing valve target opening determination method in the above embodiments, can solve the technical problem of how to optimize the mixing valve opening change rate from the perspective of improving intake pressure control stability, thereby ensuring the control accuracy of the mixing valve target opening. Compared with the prior art, the beneficial effects of the mixing valve target opening determination device provided in this application are the same as those of the mixing valve target opening determination method provided in the above embodiments, and other technical features in the mixing valve target opening determination device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0133] In one embodiment, the coefficient first determining module 10 is further configured to determine a first pressure ratio data and a second pressure ratio data based on throttle outlet pressure data and throttle inlet pressure data; determine a first correction coefficient for the current rate of change based on the first pressure ratio data and the engine speed data; and determine a second correction coefficient for the current rate of change based on the second pressure ratio data, wherein the throttle gas pressure data includes the throttle outlet pressure data and the throttle inlet pressure data.

[0134] In one embodiment, the coefficient first determination module 10 is further configured to determine first pressure ratio fluctuation data and engine speed fluctuation data based on the first pressure ratio data and the engine speed data; when the first pressure ratio fluctuation data and the engine speed fluctuation data meet the first preset fluctuation condition, obtain the historical change rate first correction coefficient, and use the historical change rate first correction coefficient as the current change rate first correction coefficient.

[0135] In one embodiment, the coefficient first determining module 10 is further configured to, when the first pressure ratio fluctuation data and the engine speed fluctuation data do not meet the first preset fluctuation condition, obtain current first pressure ratio data based on the first pressure ratio data and obtain current engine speed data based on the engine speed data; and determine a first correction coefficient for the current rate of change based on the current first pressure ratio data and the current engine speed data.

[0136] In one embodiment, the coefficient first determination module 10 is further configured to determine second pressure ratio fluctuation data based on the second pressure ratio data; when the second pressure ratio fluctuation data meets the second preset fluctuation condition, obtain the historical change rate correction second coefficient, and use the historical change rate correction second coefficient as the current change rate second correction coefficient.

[0137] In one embodiment, the coefficient first determining module 10 is further configured to, when the second pressure ratio fluctuation data meets the second preset fluctuation condition, obtain the current second pressure ratio data based on the second pressure ratio data; and determine the current rate of change second correction coefficient based on the current second pressure ratio data.

[0138] In one embodiment, the second coefficient determination module 20 is further configured to acquire EGR rate data, boost pressure data, and rate of change difference data when the mixing valve status information, the turbocharger status information, and the engine status information meet a first preset condition; and to determine the current learning coefficient based on the throttle gas pressure data and the EGR rate data when the boost pressure data and the rate of change difference data meet a second preset condition.

[0139] In one embodiment, the second coefficient determining module 20 is further configured to, when the boost pressure data and the rate of change difference data meet a second preset condition, evaluate the intake pressure responsiveness and EGR rate responsiveness based on the throttle valve gas pressure data and the EGR rate data, and obtain the intake pressure responsiveness evaluation result and the EGR rate responsiveness evaluation result; and determine the current learning coefficient based on the intake pressure responsiveness evaluation result and the EGR rate responsiveness evaluation result.

[0140] In one embodiment, the second coefficient determining module 20 is further configured to: when the intake pressure responsiveness evaluation result is that the intake pressure responsiveness meets a preset first response condition, determine an increase in the learning coefficient based on the EGR rate responsiveness evaluation result, and determine the current learning coefficient based on the increase in the learning coefficient; when the intake pressure responsiveness evaluation result is that the intake pressure responsiveness meets a preset second response condition, determine a decrease in the learning coefficient based on the EGR rate responsiveness evaluation result, and determine the current learning coefficient based on the decrease in the learning coefficient.

[0141] This application provides a device for determining the target opening degree of a hybrid valve. The device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the hybrid valve target opening degree determination method in Embodiment 1 above.

[0142] The following is for reference. Figure 6The diagram illustrates a structural schematic suitable for implementing a hybrid valve target opening determination device according to embodiments of this application. The hybrid valve target opening determination device in embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The target opening degree determination device for the mixing valve shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0143] like Figure 6 As shown, the hybrid valve target opening determination device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 1002 or a program loaded from storage device 1003 into random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the hybrid valve target opening determination device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the hybrid valve target opening determination device to communicate wirelessly or wiredly with other devices to exchange data. Although a hybrid valve target opening determination device with various systems is shown in the figure, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems can be implemented alternatively.

[0144] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0145] The mixing valve target opening determination device provided in this application, employing the mixing valve target opening determination method in the above embodiments, can solve the technical problem of how to optimize the mixing valve opening change rate from the perspective of improving intake pressure control stability, thereby ensuring the control accuracy of the mixing valve target opening. Compared with the prior art, the beneficial effects of the mixing valve target opening determination device provided in this application are the same as those of the mixing valve target opening determination method provided in the above embodiments, and other technical features in this mixing valve target opening determination device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0146] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0147] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0148] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the mixing valve target opening determination method in the above embodiments.

[0149] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0150] The aforementioned computer-readable storage medium may be included in the mixing valve target opening determination device; or it may exist independently and not assembled into the mixing valve target opening determination device.

[0151] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the mixing valve target opening determination device, cause the mixing valve target opening determination device to: acquire throttle valve gas pressure data and engine speed data, and determine a first correction coefficient and a second correction coefficient for the current rate of change based on the throttle valve gas pressure data and / or the engine speed data; acquire mixing valve status information, turbocharger status information, and engine status information, and determine a current learning coefficient based on the mixing valve status information, the turbocharger status information, and the engine status information; determine a rate of change multiplication correction coefficient based on the first correction coefficient, the second correction coefficient, and the current learning coefficient; determine the target opening rate of the mixing valve based on the rate of change multiplication correction coefficient, and determine the target mixing valve opening based on the target opening rate of the mixing valve.

[0152] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0153] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0154] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0155] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described method for determining the target opening of a mixing valve. This solves the technical problem of how to optimize the rate of change of the mixing valve opening from the perspective of improving the stability of intake pressure control, thereby ensuring the control accuracy of the target opening of the mixing valve. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the method for determining the target opening of a mixing valve provided in the above embodiments, and will not be elaborated upon here.

[0156] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method for determining the target opening of a mixing valve as described above.

[0157] The computer program product provided in this application can solve the technical problem of how to optimize the rate of change of the mixing valve opening from the perspective of improving the stability of intake pressure control, so as to ensure the control accuracy of the target opening of the mixing valve. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the mixing valve target opening determination method provided in the above embodiments, and will not be repeated here.

[0158] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for determining the target opening degree of a mixing valve, characterized in that, The method for determining the target opening degree of the mixing valve includes: Acquire throttle valve gas pressure data and engine speed data, and determine a first correction coefficient and a second correction coefficient for the current rate of change based on the throttle valve gas pressure data and / or the engine speed data; Acquire the state information of the mixing valve, the turbocharger, and the engine, and determine the current learning coefficient based on the state information of the mixing valve, the turbocharger, and the engine. The rate of change multiplication correction coefficient is determined based on the current rate of change first correction coefficient, the current rate of change second correction coefficient, and the current learning coefficient; The target opening change rate of the mixing valve is determined based on the change rate multiplication correction coefficient, and the target mixing valve opening is determined based on the target opening change rate of the mixing valve.

2. The method as described in claim 1, characterized in that, The throttle valve gas pressure data includes throttle valve outlet pressure data and throttle valve inlet pressure data; The step of determining the first correction factor and the second correction factor of the current rate of change based on the throttle gas pressure data and / or the engine speed data includes: The first pressure ratio data and the second pressure ratio data are determined based on the throttle outlet pressure data and the throttle inlet pressure data; A first correction coefficient for the current rate of change is determined based on the first pressure ratio data and the engine speed data; The second correction factor for the current rate of change is determined based on the second pressure ratio data.

3. The method as described in claim 2, characterized in that, The step of determining the first correction coefficient for the current rate of change based on the first pressure ratio data and the engine speed data includes: First pressure ratio fluctuation data and engine speed fluctuation data are determined based on the first pressure ratio data and the engine speed data; When the first pressure ratio fluctuation data and the engine speed fluctuation data meet the first preset fluctuation condition, the first correction coefficient of the historical rate of change is obtained, and the first correction coefficient of the historical rate of change is used as the first correction coefficient of the current rate of change.

4. The method as described in claim 3, characterized in that, After the step of obtaining a historical rate of change first correction coefficient and using the historical rate of change first correction coefficient as the current rate of change first correction coefficient when the first pressure ratio fluctuation data and the engine speed fluctuation data meet a first preset fluctuation condition, the method further includes: When the first pressure ratio fluctuation data and the engine speed fluctuation data do not meet the first preset fluctuation condition, the current first pressure ratio data is obtained based on the first pressure ratio data, and the current engine speed data is obtained based on the engine speed data; The first correction coefficient for the current rate of change is determined based on the current first pressure ratio data and the current engine speed data.

5. The method as described in claim 2, characterized in that, The step of determining the second correction coefficient for the current rate of change based on the second pressure ratio data includes: The second pressure ratio fluctuation data is determined based on the second pressure ratio data; When the second pressure ratio fluctuation data meets the second preset fluctuation condition, the historical change rate correction second coefficient is obtained, and the historical change rate correction second coefficient is used as the current change rate second correction coefficient.

6. The method as described in claim 5, characterized in that, After the step of obtaining the historical rate of change correction second coefficient when the second pressure ratio fluctuation data meets the second preset fluctuation condition, and using the historical rate of change correction second coefficient as the current rate of change second correction coefficient, the method further includes: When the second pressure ratio fluctuation data does not meet the second preset fluctuation condition, the current second pressure ratio data is obtained based on the second pressure ratio data; The second correction coefficient for the current rate of change is determined based on the current second pressure ratio data.

7. The method as described in claim 1, characterized in that, The step of determining the current learning coefficient based on the mixing valve state information, the turbocharger state information, and the engine state information includes: When the mixing valve status information, the turbocharger status information, and the engine status information meet the first preset condition, EGR rate data, boost pressure data, and change rate difference data are acquired. When the difference between the boost pressure data and the rate of change data meets the second preset condition, the current learning coefficient is determined based on the throttle gas pressure data and the EGR rate data.

8. The method as described in claim 7, characterized in that, The step of determining the current learning coefficient based on the throttle valve gas pressure data and the EGR rate data when the difference between the boost pressure data and the rate of change data meets the second preset condition includes: When the boost pressure data and the difference in the rate of change data meet the second preset condition, the intake pressure responsiveness and EGR rate responsiveness are evaluated based on the throttle valve gas pressure data and the EGR rate data to obtain the intake pressure responsiveness evaluation result and the EGR rate responsiveness evaluation result. The current learning coefficient is determined based on the intake pressure responsiveness assessment results and the EGR rate responsiveness assessment results.

9. The method as described in claim 8, characterized in that, The step of determining the current learning coefficient based on the intake pressure responsiveness evaluation result and the EGR rate responsiveness evaluation result includes: When the intake pressure responsiveness evaluation result is that the intake pressure responsiveness meets the preset first response condition, the learning coefficient increment is determined based on the EGR rate responsiveness evaluation result, and the current learning coefficient is determined based on the learning coefficient increment. When the intake pressure responsiveness evaluation result indicates that the intake pressure responsiveness meets the preset second response condition, the learning coefficient reduction value is determined based on the EGR rate responsiveness evaluation result, and the current learning coefficient is determined based on the learning coefficient reduction value.

10. A device for determining the target opening degree of a mixing valve, characterized in that, The device includes: The first coefficient determination module is used to acquire throttle valve gas pressure data and engine speed data, and determine the first correction coefficient and the second correction coefficient of the current rate of change based on the throttle valve gas pressure data and / or the engine speed data. The second coefficient determination module is used to acquire the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine, and to determine the current learning coefficient based on the state information of the mixing valve, the state information of the turbocharger, and the state information of the engine. The third coefficient determination module is used to determine the rate of change multiplication correction coefficient based on the current rate of change first correction coefficient, the current rate of change second correction coefficient, and the current learning coefficient; The target opening determination module is used to determine the target opening change rate of the mixing valve based on the change rate multiplication correction coefficient, and to determine the target mixing valve opening based on the target opening change rate of the mixing valve.

11. A device for determining the target opening degree of a mixing valve, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the method for determining the target opening of a hybrid valve as described in any one of claims 1 to 9.

12. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the method for determining the target opening degree of a hybrid valve as described in any one of claims 1 to 9.

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