Actuator operating parameter determination method, device, controller and storage medium

Abstract

The application relates to a method and device for determining operation parameters of actuators, a controller and a storage medium. The method comprises the following steps: acquiring a current temperature value at an inlet of a selective catalytic reduction (SCR) device and a current working condition parameter of an engine of a vehicle; determining an operation parameter table of each actuator of the engine corresponding to a temperature interval in which the current temperature value is located; wherein the parameter table comprises a corresponding relationship between an operation parameter of the actuator and the engine working condition parameter; and obtaining the operation parameter of each actuator according to the current working condition parameter and the operation parameter table of each actuator. The method can improve the adjustment accuracy of the operation parameters of the actuators.

Description

Technical Field

[0001] This application relates to the field of transportation technology, and in particular to a method, apparatus, controller, and storage medium for determining actuator operating parameters. Background Technology

[0002] With the development of transportation, the requirements for the treatment of nitrogen oxide emissions from vehicle engines are becoming increasingly stringent. Currently, the method for treating nitrogen oxide emissions is selective catalytic reduction (SCR). SCR mainly uses urea as a reactant to convert nitrogen oxides into nitrogen gas before it is discharged. However, urea needs to be at a suitable temperature to ensure that it can play its maximum role. Therefore, it is necessary to adjust the exhaust temperature of the engine to a suitable temperature.

[0003] Traditional technology primarily adjusts the operating parameters of various actuators within the engine to regulate the exhaust temperature to a suitable level. However, this traditional technology suffers from low accuracy in adjusting the operating parameters of each actuator. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, controller, and storage medium for determining actuator operating parameters that can improve the accuracy of adjusting the operating parameters of each actuator, in order to address the above-mentioned technical problems.

[0005] Firstly, this application provides a method for determining actuator operating parameters. The method includes:

[0006] Obtain the current temperature value at the inlet of the selective catalytic reduction equipment and the current operating parameters of the vehicle's engine;

[0007] A table of operating parameters for each actuator of the engine corresponding to the temperature range in which the current temperature value is located is determined; wherein, the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating parameters;

[0008] Based on the current operating condition parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained.

[0009] In one embodiment, the current operating condition parameters include the current torque value and the current speed value of the engine; the operating parameter table includes the correspondence between the engine torque value, the engine speed value and the operating parameters of the actuator.

[0010] In one embodiment, obtaining the operating parameters of each actuator based on the current operating condition parameters and the operating parameter table of each actuator includes:

[0011] The operating parameters of each actuator are obtained based on the current torque value of the engine, the current speed value of the engine, and the operating parameter table of each actuator.

[0012] In one embodiment, the actuator includes an exhaust throttle valve, the operating parameters of which include the opening value of the exhaust throttle valve; the method further includes: acquiring the current pressure value of the engine's turbine pressure sensor;

[0013] The target opening value of the exhaust throttle valve is obtained based on the current pressure value and the opening value of the exhaust throttle valve.

[0014] In one embodiment, obtaining the target opening value of the exhaust throttle valve based on the current pressure value and the opening value of the exhaust throttle valve includes:

[0015] Based on the temperature range where the current temperature value is located and a preset correspondence table, determine the pressure setting value corresponding to the temperature range where the current temperature value is located; the preset correspondence table includes the correspondence between temperature ranges and pressure setting values.

[0016] The calculated value of the exhaust throttle opening is obtained based on the current pressure value and the pressure setting value.

[0017] The sum of the calculated value of the exhaust throttle opening and the actual opening value of the exhaust throttle is determined as the target opening value of the exhaust throttle.

[0018] In one embodiment, obtaining the calculated value of the exhaust throttle opening based on the current pressure value and the pressure setpoint includes:

[0019] Using a PID algorithm, the calculated value of the exhaust throttle opening is obtained based on the current pressure value and the pressure setpoint.

[0020] Secondly, this application also provides a device for determining actuator operating parameters. The device includes:

[0021] The first acquisition module is used to acquire the current temperature value at the inlet of the selective catalytic reduction device and the current operating parameters of the engine of the vehicle.

[0022] The determination module is used to determine the operating parameter table of each actuator of the engine corresponding to the temperature range where the current temperature value is located; wherein, the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating condition parameters;

[0023] The second acquisition module is used to obtain the operating parameters of each actuator based on the current operating condition parameters and the operating parameter table of each actuator.

[0024] Thirdly, this application also provides a controller. The controller includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0025] Obtain the current temperature value at the inlet of the selective catalytic reduction equipment and the current operating parameters of the vehicle's engine;

[0026] A table of operating parameters for each actuator of the engine corresponding to the temperature range in which the current temperature value is located is determined; wherein, the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating parameters;

[0027] Based on the current operating condition parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained.

[0028] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0029] Obtain the current temperature value at the inlet of the selective catalytic reduction equipment and the current operating parameters of the vehicle's engine;

[0030] A table of operating parameters for each actuator of the engine corresponding to the temperature range in which the current temperature value is located is determined; wherein, the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating parameters;

[0031] Based on the current operating condition parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained.

[0032] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0033] Obtain the current temperature value at the inlet of the selective catalytic reduction equipment and the current operating parameters of the vehicle's engine;

[0034] A table of operating parameters for each actuator of the engine corresponding to the temperature range in which the current temperature value is located is determined; wherein, the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating parameters;

[0035] Based on the current operating condition parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained.

[0036] The aforementioned method, apparatus, controller, and storage medium for determining actuator operating parameters, by acquiring the current temperature value at the inlet of the selective catalytic reduction equipment and the current operating parameters of the vehicle's engine, can accurately determine the operating parameter table of each actuator of the engine corresponding to the temperature range of the current temperature value. Since the determined operating parameter table of each actuator is temperature-related, the operating parameters of each actuator can be accurately obtained based on the current operating parameters of the engine and the operating parameter table of each actuator, thereby improving the accuracy of adjusting the operating parameters of each actuator. Attached Figure Description

[0037] Figure 1 This is an application environment diagram of a method for determining actuator operating parameters in one embodiment;

[0038] Figure 2 This is a flowchart illustrating a method for determining actuator operating parameters in one embodiment;

[0039] Figure 3 This is a flowchart illustrating a method for determining actuator operating parameters in one embodiment;

[0040] Figure 4 This is a flowchart illustrating a method for determining actuator operating parameters in one embodiment;

[0041] Figure 5 This is a schematic diagram of the internal structure of the engine system in one embodiment;

[0042] Figure 6 This is a flowchart illustrating a method for determining actuator operating parameters in one embodiment;

[0043] Figure 7 This is a structural block diagram of a device for determining actuator operating parameters in one embodiment;

[0044] Figure 8 This is a diagram of the internal structure of the controller in one embodiment. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] The method for determining actuator operating parameters provided in this application embodiment can be applied to, for example, Figure 1In the illustrated application environment, the engine control unit 101 in the vehicle 10 can communicate with each engine sensor 102 and each engine actuator 103 via a network or data cable. The engine control unit 101 can acquire various operating data of the engine collected by each engine sensor 102 and analyze this data. Based on the analysis results, the engine control unit 101 can control each engine actuator 103 to ensure the engine of the vehicle 10 is in optimal operating condition. It should be noted that the specific number of engine sensors 102 and engine controller 103 included in the vehicle 10 can be configured according to different vehicles 10. Figure 1 This is only for the purpose of illustrating the application environment of this method; that is to say, Figure 1 The number of engine sensors 102 and engine controllers 103 included in the vehicle 10 shown can be multiple. The engine control unit 101 in the vehicle 10 can communicate with multiple engine sensors 102 and multiple engine actuators 103 via a network or data line, thereby enabling the engine of the vehicle 10 to be in optimal working condition.

[0047] In one embodiment, such as Figure 2 As shown, a method for determining actuator operating parameters is provided, which can be applied to... Figure 1 Taking the engine control unit as an example, the explanation includes the following steps:

[0048] S201, obtain the current temperature value at the inlet of the selective catalytic reduction (SCR) device and the current operating parameters of the vehicle's engine at the exhaust throttle valve.

[0049] The vehicles can include commercial vehicles, passenger cars, buses, cars, trucks, vans, etc., and this embodiment is not limited thereto. The engines of the vehicles can include gasoline engines, diesel engines, etc., and this embodiment is not limited thereto. Selective Catalytic Reduction (SCR) equipment is an exhaust gas treatment device for engines. SCR equipment can use a reducing agent, under the action of a catalyst, to selectively reduce nitrogen oxides in engine exhaust gas to nitrogen and water, thereby reducing nitrogen oxides in engine exhaust gas. Engine operating conditions refer to the engine's operating status at a certain moment, which can include idling, low load, medium load, full load, cold start, warm-up, acceleration, etc. Engine operating condition parameters can be used to characterize various operating condition features of the engine, including engine speed, engine torque, etc., and this embodiment is not limited thereto.

[0050] Optionally, a temperature sensor can be installed at the inlet of the SCR device. The temperature sensor can detect the temperature at the inlet of the SCR device and send the detected temperature value to the engine control unit, so that the engine control unit can obtain the current temperature value at the inlet of the SCR device.

[0051] Optionally, the engine control unit can obtain the current operating parameters of the engine through various sensors. For example, to obtain the current engine speed and current engine torque, the engine speed sensor can detect the engine speed and send the detected speed value to the engine control unit, thereby allowing the engine control unit to obtain the current engine speed. Similarly, the engine torque sensor can detect the engine torque and send the detected torque value to the engine control unit, thereby allowing the engine control unit to obtain the current engine torque value.

[0052] S202, determine the operating parameter table of each actuator of the engine corresponding to the temperature range where the current temperature value is located; wherein, the parameter table includes the correspondence between the operating parameters of the actuator and the engine operating condition parameters.

[0053] The actuators of the engine may include fuel injectors, exhaust throttle valves, fuel metering valves, etc., and this embodiment does not impose any limitations. The operating parameters of the actuators can be used to adjust their operating states. The engine control unit can control each actuator according to these operating parameters. For example, the engine control unit can adjust the operating state of the fuel injectors by changing their operating parameters. The number of temperature ranges can be an optimal number determined after extensive engine testing. For example, the temperature ranges can be divided into five ranges: less than T0, T0-T1, T1-T2, T2-T3, and greater than T3. The values ​​of T0, T1, T2, and T3 can be optimal values ​​determined after extensive engine testing. For example, T0 can be 100°C, T1 can be 150°C, T2 can be 200°C, and T3 can be 250°C. If the current temperature is 120°C, the engine control unit determines the temperature range corresponding to the current temperature value as the T0-T1 temperature range.

[0054] Optionally, within a preset time interval, if the temperature range corresponding to multiple consecutive temperature values ​​acquired by the engine control unit changes, the engine control unit can also switch the temperature range corresponding to the temperature value. For example, if the current temperature value corresponds to the temperature range T0-T1, and within the next 1 second, if the engine control unit acquires 5 consecutive temperature values ​​that are all in the T1-T2 temperature range, then it is determined that the temperature range corresponding to the temperature value can be switched from the T0-T1 temperature range to the T1-T2 temperature range; if 4 out of the 5 temperature values ​​acquired by the engine control unit are in the T1-T2 temperature range and 1 temperature value is in the T0-T1 temperature range, then it is determined that the temperature range corresponding to the temperature value will not be switched.

[0055] It should be noted that the operating parameter tables for each actuator of the engine are different for each temperature range. For example, the operating parameter table for the injector corresponding to the T0-T1 temperature range is different from that for the injector corresponding to the T1-T2 temperature range. Furthermore, if the temperature range corresponding to the temperature value changes, the engine control unit can also switch the operating parameter tables for each actuator of the engine corresponding to the temperature range. For example, if the temperature range corresponding to the temperature value changes from the T0-T1 temperature range to the T1-T2 temperature range, the engine control unit can also switch the operating parameter tables for each actuator corresponding to the T0-T1 temperature range to the operating parameter tables for each actuator corresponding to the T1-T2 temperature range.

[0056] S203: Based on the current operating parameters and the operating parameter table of each actuator, obtain the operating parameters of each actuator.

[0057] The operating parameters of each actuator can be measured using different standards. For example, the operating parameter of the exhaust throttle valve can be its opening degree, the operating parameter of the fuel injector can be its injection advance angle, and the operating parameter of the fuel metering valve can be its fuel rail pressure, etc. It should be noted that changes in the operating parameters of each actuator can affect the engine's operating state, thereby affecting various engine performance parameters. For example, the exhaust throttle valve can control the flow rate of exhaust gases from the engine. Adjusting the opening value of the exhaust throttle valve can affect the engine's exhaust temperature. If the opening value of the exhaust throttle valve is small, the exhaust throttle valve is in a near-closed state. At this time, the engine load increases, which can cause the engine's exhaust temperature to rise. Similarly, the fuel injector can control the amount of fuel injected and the injection angle. Adjusting the injection advance angle of the fuel injector can also affect the engine's exhaust temperature. If the injection advance angle of the fuel injector is large, the fuel combustion occurs in the later part of the engine cylinder, which can cause the engine's exhaust temperature to rise.

[0058] Optionally, the engine control unit can search and match the operating parameter tables of each actuator according to the operating condition parameters to obtain the operating parameters of each actuator. For example, the actuator of the engine may include the exhaust throttle valve, and the operating parameter of the exhaust throttle valve may be the opening value of the exhaust throttle valve. The engine control unit can search and match the operating parameter table of the exhaust throttle valve according to the current engine speed and the current engine torque to determine the opening value of the exhaust throttle valve. For example, as shown in Table 1, Table 1 is the operating parameter table of the exhaust throttle valve corresponding to the temperature range of T0-T1. If the current engine speed is 700 and the current engine torque is 1000, then the engine control unit can determine the operating parameter of the exhaust throttle valve as 8% according to Table 1, and thus the engine control unit can determine the opening value of the exhaust throttle valve as 8%.

[0059] Table 1. Operating parameters of the exhaust throttle valve corresponding to the T0-T1 temperature range.

[0060]

[0061]

[0062] It should be noted that in traditional technology, the engine control unit directly searches and matches the operating parameter tables of each actuator based on the engine operating parameters to obtain the operating parameters of each actuator, thereby adjusting the engine's exhaust temperature. Under the same operating conditions, the operating parameters of each actuator may be consistent at different exhaust temperatures. This can lead to the problem that more fuel is needed to ensure that the exhaust temperature is adjusted to a suitable level at lower exhaust temperatures. For example, in traditional technology, if the engine operating conditions are the same at 50°C and 150°C, and the operating parameters of each actuator are consistent, the engine needs to consume more fuel to adjust the exhaust temperature to a suitable level at 50°C compared to at 150°C. This solution can determine the temperature range of the current temperature value at the SCR equipment inlet, and then determine the operating parameter table of each actuator of the engine corresponding to the current temperature range. The operating parameters of each actuator are different in the operating parameter table corresponding to different temperature ranges. The operating parameters in each operating parameter table are the optimal operating parameters obtained after a large number of tests on the engine. This ensures that under the same operating conditions, the operating parameters of each actuator of the engine are different at different exhaust temperatures. Thus, the engine control unit can accurately adjust the operating parameters of each actuator, so that the engine can adjust the exhaust temperature to a suitable temperature by consuming less fuel at low exhaust temperatures.

[0063] In the above method for determining actuator operating parameters, the engine control unit can accurately determine the operating parameter table of each actuator of the engine corresponding to the temperature range of the current temperature value by obtaining the current temperature value at the inlet of the selective catalytic reduction equipment and the current operating condition parameters of the vehicle's engine. Since the determined operating parameter table of each actuator is temperature-related, the operating parameters of each actuator can be accurately obtained based on the current operating condition parameters of the engine and the operating parameter table of each actuator, thereby improving the accuracy of adjusting the operating parameters of each actuator.

[0064] Based on the above embodiments, in one embodiment, the current operating condition parameters include the current torque value and the current speed value of the engine; the operating parameter table includes the correspondence between the engine torque value, the engine speed value and the operating parameters of the actuator.

[0065] Among them, the engine speed value can be used to measure how much work the engine does per unit time. The higher the engine speed value, the more work the engine does per unit time, and the lower the engine speed value, the less work the engine does per unit time. The engine torque value can be used to measure the engine's acceleration ability. The greater the engine torque value, the stronger the engine's acceleration ability, and the lower the engine torque value, the weaker the engine's acceleration ability.

[0066] Optionally, the engine control unit can obtain the current engine speed value through the engine speed sensor and the current engine torque value through the engine torque sensor, thereby obtaining the current operating parameters of the engine. Optionally, the engine control unit can determine the operating parameters of each actuator by querying and matching the engine torque value and engine speed value in the operating parameter table according to the correspondence between the engine torque value, engine speed value and actuator operating parameters.

[0067] Furthermore, in one embodiment, the engine control unit can also obtain the operating parameters of each actuator based on the engine's current torque value, the engine's current speed value, and the operating parameter table of each actuator.

[0068] For example, as shown in Table 2, which is a table of injector operating parameters corresponding to the temperature range T0-T1, if the current engine speed is 700 and the current engine torque is 500, the engine control unit can determine the injector operating parameter as 5° according to Table 2. Thus, the engine control unit can adjust the injector injection advance angle to 5°. Furthermore, if the current engine speed and / or the current engine torque changes, the corresponding injector operating parameters will also change. For example, if the current engine speed changes from 700 to 1200, while the current engine torque remains unchanged at 500, the engine control unit can determine the injector operating parameter to change from 5° to 10° according to Table 2.

[0069] Table 2. Operating parameters of fuel injectors corresponding to the temperature range T0-T1

[0070]

[0071] It should be noted that the operating parameters in Table 2 above are merely examples given to illustrate this embodiment. In reality, the operating parameters in each operating parameter table are the optimal operating parameters obtained after conducting extensive tests on each actuator of the engine. These optimal operating parameters can ensure that the engine's various performances are always in the best state with low fuel consumption, thereby keeping the engine in the best working state. It can be understood that the number of temperature ranges and the setting of temperature range boundary values ​​can also be obtained through extensive testing. The more accurate the setting of the number of temperature ranges and temperature range boundary values, the more accurate the engine control unit's control of each actuator of the engine, thereby keeping the engine in the best working state under different exhaust temperature conditions.

[0072] In this embodiment, the engine can accurately obtain the operating parameters of each actuator based on the engine's current torque value and the engine's current speed value at the exhaust throttle valve, and through the correspondence between the engine's torque value, engine speed value and actuator operating parameters included in the operating parameter table, thereby improving the accuracy of adjusting the operating parameters of each actuator.

[0073] Based on the above embodiments, such as Figure 3 As shown, in one embodiment, the actuator includes an exhaust throttle valve, the operating parameters of which include the opening value of the exhaust throttle valve; S203 above includes:

[0074] S301, obtain the current pressure value of the engine's turbine pressure sensor.

[0075] The turbocharger pressure sensor can be installed at the turbocharger inlet to detect the pressure at the turbocharger inlet and send the current pressure value at the turbocharger inlet to the engine control unit. Thus, the engine control unit can obtain the current pressure value at the turbocharger inlet through the turbocharger pressure sensor.

[0076] S302: Based on the current pressure value and the opening value of the exhaust throttle valve, obtain the target opening value of the exhaust throttle valve.

[0077] Optionally, the engine control unit can perform closed-loop control of the exhaust throttle opening value based on the current pressure value of the turbine pressure sensor. Closed-loop control is a control method that can correct the exhaust throttle opening value in real time based on the current pressure value. Through closed-loop control, the engine control unit can accurately adjust the exhaust throttle opening value to obtain the target exhaust throttle opening value.

[0078] It should be noted that if there are enough temperature ranges corresponding to the current temperature value, there will also be enough operating parameter tables for the exhaust throttle valve for each temperature range. In other words, each actuator of the engine has corresponding operating parameters under different temperature conditions. At this time, the operating parameters of the exhaust throttle valve obtained through the operating parameter tables can ensure that the exhaust throttle valve is in the optimal working state. Therefore, it is not necessary to use closed-loop control. That is to say, it is not necessary to adjust the opening value of the exhaust throttle valve according to the pressure value of the engine's turbo pressure sensor, and the exhaust throttle valve can be accurately adjusted to the optimal working state.

[0079] In this embodiment, the engine control unit can obtain the current pressure value of the engine's turbine pressure sensor, and based on the current pressure value and the opening value of the exhaust throttle valve, it can accurately obtain the target opening value of the exhaust throttle valve, thereby improving the accuracy of exhaust throttle valve control.

[0080] Based on the above embodiments, in some scenarios, closed-loop control is required, that is, the exhaust throttle opening value needs to be adjusted according to the pressure value of the engine's turbo pressure sensor, such as... Figure 4 As shown, in one embodiment, the above method further includes:

[0081] S401, determine the pressure setting value corresponding to the temperature range where the current temperature value is located based on the temperature range and the preset correspondence table; the preset correspondence table includes the correspondence between temperature ranges and pressure setting values.

[0082] Different temperature ranges correspond to different pressure setting values. For example, as shown in Table 3, if the temperature range is divided into five temperature ranges: less than T0, T0-T1, T1-T2, T2-T3, and greater than T3, then: (1) in the temperature range less than T0, the pressure setting value is 1; (2) in the temperature range T0-T1, the pressure setting value is 2; (3) in the temperature range T1-T2, the pressure setting value is 3; (4) in the temperature range T2-T3, the pressure setting value is 4; and (5) in the temperature range greater than T3, the pressure setting value is 5.

[0083] Table 3. Correspondence between temperature range and pressure setpoint

[0084] <![CDATA[less than T0]]> 1 <![CDATA[T0-T1]]> 2 <![CDATA[T1-T2]]> 3 <![CDATA[T2-T3]]> 4 <![CDATA[greater than T3]]> 5

[0085] S402, based on the current pressure value and the pressure setting value, obtains the calculated value of the exhaust throttle opening.

[0086] The calculated value of the exhaust throttle opening can be used to adjust the exhaust throttle opening value to determine the target opening value of the exhaust throttle. Optionally, the engine control unit can use a closed-loop control algorithm to calculate the current pressure value and the pressure setpoint to obtain the calculated value of the exhaust throttle opening.

[0087] Furthermore, in one embodiment, the engine control unit can use a PID algorithm to obtain a calculated value for the opening of the exhaust throttle valve based on the current pressure value and the pressure setpoint.

[0088] PID stands for Proportional, Integral, and Differential. The PID algorithm is a control algorithm that combines these three functions. It calculates the exhaust throttle opening based on the deviation between the current pressure value and the pressure setpoint using these functions. Optionally, the engine control unit can support floating-point calculations, where floating-point refers to numerical values ​​with decimals. Floating-point calculations involve arithmetic operations with decimals. The PID algorithm involves many floating-point calculations, and the engine control unit can support this, allowing for a fast and accurate calculation of the exhaust throttle opening.

[0089] S403, the sum of the calculated value of the exhaust throttle opening and the actual exhaust throttle opening value is determined as the target opening value of the exhaust throttle.

[0090] Optionally, the calculated value of the exhaust throttle opening can be positive or negative. For example, if the exhaust throttle opening value is 5%, and the calculated value of the exhaust throttle opening is 1%, then the target opening value of the exhaust throttle is 5% + 1% = 6%. If the calculated value of the exhaust throttle opening is -1%, then the target opening value of the exhaust throttle is 5% - 1% = 4%.

[0091] In this embodiment, the engine control unit can accurately determine the pressure setpoint corresponding to the current temperature range based on the current temperature range and a preset correspondence table. Based on the current pressure value and the pressure setpoint, it can accurately obtain the calculated value of the exhaust throttle opening. The sum of the calculated value of the exhaust throttle opening and the actual exhaust throttle opening value is determined as the target opening value of the exhaust throttle, thereby enabling accurate control of the exhaust throttle opening.

[0092] To facilitate understanding by those skilled in the art, the method for determining the actuator operating parameters provided in this application is described in detail below. Please refer to [link / reference needed]. Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the internal structure of an engine system in one embodiment. The method for determining actuator operating parameters provided in this application embodiment can be applied to, for example... Figure 5 In the engine system shown, Figure 6 This is a flowchart illustrating a method for determining actuator operating parameters in one embodiment. The method may include:

[0093] S1, the engine control unit acquires the current temperature value at the inlet of the selective catalytic reduction (SCR) device and the current operating parameters of the vehicle's engine.

[0094] S2, the engine control unit determines the operating parameter table of each actuator of the engine corresponding to the temperature range where the current temperature value is located.

[0095] S3, the engine control unit obtains the operating parameters of each actuator based on the engine's current torque value, engine's current speed value, and the operating parameter table of each actuator.

[0096] Furthermore, in some scenarios, the opening value of the exhaust throttle valve can be adjusted by closed-loop control, i.e., based on the pressure value of the engine's turbine pressure sensor. After obtaining the opening value of the exhaust throttle valve, the following steps S4 to S5 can be executed.

[0097] S4, the engine control unit obtains the current pressure value from the engine's turbine pressure sensor.

[0098] S5, the engine control unit determines the pressure setpoint corresponding to the current temperature range based on the temperature range and the preset correspondence table, and uses the PID algorithm to obtain the exhaust throttle opening value based on the current pressure value and the pressure setpoint. The engine control unit determines the target opening value of the exhaust throttle by summing the calculated exhaust throttle opening value and the exhaust throttle opening value.

[0099] It should be noted that the number of actuators can be configured according to different vehicles and different engines. Figure 6 The three actuators shown in the diagram—injector, fuel metering valve, and exhaust throttle valve—are only for the purpose of illustrating this embodiment. In other words, the engine control unit can obtain the operating parameters of multiple actuators and thus control multiple actuators.

[0100] It should be understood that although the steps in the flowcharts of the above embodiments of the exhaust throttle valve are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the flowcharts of the above embodiments of the exhaust throttle valve may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0101] It should be noted that the descriptions in S1-S5 above can be found in the relevant descriptions in the above embodiments, and their effects are similar, so they will not be repeated here.

[0102] Based on the same inventive concept, this application also provides an actuator operating parameter determination device for implementing the actuator operating parameter determination method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more actuator operating parameter determination device embodiments provided below can be found in the limitations of the actuator operating parameter determination method described above, and will not be repeated here.

[0103] In one embodiment, such as Figure 7 As shown, an actuator operating parameter determination device is provided, comprising: a first acquisition module, a determination module, and a second acquisition module, wherein:

[0104] The first acquisition module is used to acquire the current temperature value at the inlet of the selective catalytic reduction equipment and the current operating parameters of the vehicle's engine;

[0105] The determination module is used to determine the operating parameter table of each actuator of the engine corresponding to the temperature range where the current temperature value is located; wherein, the parameter table includes the correspondence between the operating parameters of the actuator and the engine operating condition parameters;

[0106] The second acquisition module is used to obtain the operating parameters of each actuator based on the current operating condition parameters and the operating parameter table of each actuator.

[0107] Optionally, the current operating parameters include the current torque value and the current speed value of the engine; the operating parameter table includes the correspondence between the engine torque value, the engine speed value and the operating parameters of the actuator.

[0108] The actuator operating parameter determination device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0109] Based on the above embodiments, optionally, the second acquisition module includes: a first acquisition unit, wherein:

[0110] The first acquisition unit is used to obtain the operating parameters of each actuator based on the current torque value of the engine, the current speed value of the engine, and the operating parameter table of each actuator.

[0111] The actuator operating parameter determination device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0112] Based on the above embodiments, optionally, the actuator includes an exhaust throttle valve, and the operating parameters of the exhaust throttle valve include the opening value of the exhaust throttle valve; the device further includes: a third acquisition module and a fourth acquisition module, wherein:

[0113] The third acquisition module is used to acquire the current pressure value of the engine's turbine pressure sensor;

[0114] The fourth acquisition module is used to obtain the target opening value of the exhaust throttle valve based on the current pressure value and the opening value of the exhaust throttle valve.

[0115] The actuator operating parameter determination device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0116] Based on the above embodiments, optionally, the fourth acquisition module includes a first determining unit, a second acquisition unit, and a second determining unit, wherein:

[0117] The first determining unit is used to determine the pressure setting value corresponding to the temperature range where the current temperature value is located, based on the temperature range where the current temperature value is located and a preset correspondence table; the preset correspondence table includes the correspondence between temperature ranges and pressure setting values.

[0118] The second acquisition unit is used to obtain the calculated value of the exhaust throttle opening based on the current pressure value and the pressure setting value.

[0119] The second determining unit is used to determine the target opening value of the exhaust throttle valve by summing the calculated opening value of the exhaust throttle valve and the opening value of the exhaust throttle valve.

[0120] The actuator operating parameter determination device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0121] Based on the above embodiments, optionally, the second acquisition unit is specifically used to obtain the calculated value of the exhaust throttle opening by using a PID algorithm based on the current pressure value and the pressure set value.

[0122] The actuator operating parameter determination device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0123] Each module in the aforementioned actuator operating parameter determination device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the operations corresponding to each module.

[0124] In one embodiment, a controller is provided, the internal structure of which can be shown in the following diagram. Figure 7 As shown, the controller includes a processor, memory, and a communication interface connected via a system bus. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a message exchange method.

[0125] Those skilled in the art will understand that Figure 7The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0126] In one embodiment, a controller is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to perform the following steps:

[0127] Obtain the current temperature value at the inlet of the selective catalytic reduction (SCR) equipment and the current operating parameters of the vehicle's engine;

[0128] Determine the operating parameter table for each actuator of the engine corresponding to the temperature range where the current temperature value is located; the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating parameters;

[0129] Based on the current operating parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained.

[0130] The controller provided in the above embodiments has a similar implementation principle and technical effect to the method embodiments described above, and will not be repeated here.

[0131] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0132] Obtain the current temperature value at the inlet of the selective catalytic reduction (SCR) equipment and the current operating parameters of the vehicle's engine;

[0133] Determine the operating parameter table for each actuator of the engine corresponding to the temperature range where the current temperature value is located; the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating parameters;

[0134] Based on the current operating parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained.

[0135] The computer-readable storage medium provided in the above embodiments has similar implementation principles and technical effects to the above method embodiments, and will not be described again here.

[0136] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0137] Obtain the current temperature value at the inlet of the selective catalytic reduction (SCR) equipment and the current operating parameters of the vehicle's engine;

[0138] Determine the operating parameter table for each actuator of the engine corresponding to the temperature range where the current temperature value is located; the parameter table includes the correspondence between the operating parameters of the actuators and the engine operating parameters;

[0139] Based on the current operating parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained.

[0140] The computer program products provided in the above embodiments are similar in implementation principle and technical effect to the above method embodiments, and will not be described again here.

[0141] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0142] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program for the exhaust throttle valve can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0143] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0144] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for determining actuator operating parameters, characterized in that, The method is applied to a vehicle, and the method includes: The current temperature value at the inlet of the selective catalytic reduction (SCR) device and the current operating parameters of the vehicle's engine are obtained; the current operating parameters include the current torque value and the current speed value of the engine; the selective catalytic reduction (SCR) device sequentially passes through a particulate filter, an oxidation catalytic converter, and an exhaust throttle valve connected to the cylinder; the current temperature value is collected by an SCR inlet temperature sensor installed on the pipeline between the selective catalytic reduction (SCR) device and the particulate filter. Determine the operating parameter table of each actuator of the engine corresponding to the temperature range where the current temperature value is located; wherein, the parameter table includes the operating parameters of the actuator and the correspondence between the torque value and the speed value of the engine, and the operating parameter table of the actuator corresponding to each temperature range is different; Based on the current operating condition parameters and the operating parameter table of each actuator, the operating parameters of each actuator are obtained. The actuator includes an injector, an exhaust throttle valve, and an inlet metering valve. The adjustment of the operating parameters of each actuator is used to affect the exhaust temperature of the engine. The operating parameters of the exhaust throttle valve include the opening value of the exhaust throttle valve. The current pressure value of the turbine pressure sensor of the engine is obtained; according to the temperature range where the current temperature value is located and a preset correspondence table, the pressure setpoint corresponding to the temperature range where the current temperature value is located is determined; the preset correspondence table includes the correspondence between temperature ranges and pressure setpoints; using a proportional-integral-derivative (PID) algorithm, the opening value of the exhaust throttle valve is calculated based on the current pressure value and the pressure setpoint; the sum of the calculated opening value of the exhaust throttle valve and the opening value of the exhaust throttle valve is determined as the target opening value of the exhaust throttle valve.

2. The method according to claim 1, characterized in that, The step of obtaining the operating parameters of each actuator based on the current operating condition parameters and the operating parameter table of each actuator includes: The operating parameters of each actuator are obtained based on the current torque value of the engine, the current speed value of the engine, and the operating parameter table of each actuator.

3. A device for determining actuator operating parameters, characterized in that, The device includes: The first acquisition module is used to acquire the current temperature value at the inlet of the selective catalytic reduction (SCR) device and the current operating parameters of the vehicle's engine; the current operating parameters include the current torque value and the current speed value of the engine; the selective catalytic reduction (SCR) device sequentially passes through a particulate capture device, an oxidation catalytic converter, and an exhaust throttle valve connected to the cylinder; the current temperature value is acquired by an SCR inlet temperature sensor installed on the pipeline between the selective catalytic reduction (SCR) device and the particulate capture device. The determination module is used to determine the operating parameter table of each actuator of the engine corresponding to the temperature range where the current temperature value is located; wherein, the parameter table includes the operating parameters of the actuator and the correspondence between the torque value and the speed value of the engine, and the operating parameter table of the actuator corresponding to each temperature range is different; The second acquisition module is used to obtain the operating parameters of each actuator according to the current operating condition parameters and the operating parameter table of each actuator. The actuator includes an injector, an exhaust throttle valve, and an inlet metering valve. The adjustment of the operating parameters of each actuator is used to affect the exhaust temperature of the engine. The operating parameters of the exhaust throttle valve include the opening value of the exhaust throttle valve. The current pressure value of the turbine pressure sensor of the engine is obtained; according to the temperature range where the current temperature value is located and a preset correspondence table, the pressure setpoint corresponding to the temperature range where the current temperature value is located is determined; the preset correspondence table includes the correspondence between temperature ranges and pressure setpoints; using a proportional-integral-derivative (PID) algorithm, the opening value of the exhaust throttle valve is calculated based on the current pressure value and the pressure setpoint; the sum of the calculated opening value of the exhaust throttle valve and the opening value of the exhaust throttle valve is determined as the target opening value of the exhaust throttle valve.

4. A controller comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 2.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 2.

6. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 2.

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