Post-processing integrated electric heating control method, device and equipment and storage medium

Abstract

The invention provides a post-processing integrated electric heating control method, device and equipment and a storage medium, and the method comprises the steps that generator power is obtained from an engine controller, and the generator power is calculated by the engine controller based on the engine rotating speed; calculating an electric heating power based on the post-processing demand temperature; calculating a power difference value according to the generator power and the electric heating power; determining whether the power difference value is greater than zero; and based on a determination result, controlling the integrated electric heating device to enter a boost mode or a buck mode, controlling the integrated electric heating device to enter the boost mode when the power difference value is less than zero, and controlling the integrated electric heating device to enter the buck mode when the power difference value is greater than zero. The boost or buck mode is controlled through electric energy complementation, direct drive power supply and power difference, stable operation of the electric heating device is ensured, the post-treatment effect is improved, and the strict emission standard is met.

Description

Technical Field

[0001] This application belongs to the field of heating control, and in particular relates to an integrated electric heating control method, device, equipment and storage medium for post-processing. Background Technology

[0002] Under low-to-medium engine speeds, the exhaust temperature of the aftertreatment system is relatively low, making it difficult to effectively remove NOx and particulate matter from the exhaust gas. This results in poor filtration and may even cause the aftertreatment filter to become clogged, damaging the aftertreatment system and releasing harmful gases into the atmosphere. To address this challenge, the industry has begun researching and developing electric heating devices for aftertreatment systems to increase engine exhaust temperature, thereby more effectively eliminating NOx and particulate matter.

[0003] Currently, there are some related post-processing electric heating system architecture solutions, such as invention patents with patent numbers CN 115045735A and CN 112943425A.

[0004] The system architecture scheme with patent number CN 115045735 A mainly includes a power supply for the electric heating device and a relay connected to the vehicle's electronic control unit (ECU). The ECU controls the relay to switch the electric heating device on and off. However, this scheme has a relatively simple function, and the single power supply method makes it difficult to stabilize the power of the electric heating device.

[0005] On the other hand, the post-processing electric heating control system with patent number CN 112943425 A provides multiple heating modes, such as single-time long-heating mode and single-time constant-temperature heating mode, to adapt to different heating needs. However, this solution still has shortcomings in controlling the electric heating power, and cannot directly control and stabilize the power output of the electric heating device.

[0006] Existing post-treatment electric heating systems have shortcomings in structural stability and control methods, making it difficult to stabilize the heating power of the electric heating device, thus affecting the elimination effect of the post-treatment system on NOx and PN particulate matter. Summary of the Invention

[0007] The purpose of this application is to overcome the deficiencies in the prior art and provide an integrated electric heating control method, apparatus, equipment and storage medium for post-processing.

[0008] This application provides an integrated electric heating control method for post-processing, including:

[0009] The generator power is obtained from the engine controller, which calculates the generator power based on the engine speed.

[0010] Calculate the electric heating power based on the post-processing temperature requirements;

[0011] Calculate the power difference based on the generator power and the electric heating power;

[0012] Determine whether the power difference is greater than zero;

[0013] Based on the determined results, the integrated electric heating device is controlled to enter either a boost mode or a buck mode. Specifically, when the power difference is less than zero, the device is controlled to enter the boost mode, and when the power difference is greater than zero, the device is controlled to enter the buck mode.

[0014] Optionally, the control of the integrated electric heating device to enter either a boost mode or a buck mode includes:

[0015] The boost or buck operation is performed by the DC-DC function integrated in the integrated electric heating controller.

[0016] The DC-DC function boosts the power from the vehicle battery in boost mode and supplies it to the integrated electric heating device. In buck mode, it reduces the excess power from the generator and stores it in the vehicle battery.

[0017] Optionally, obtaining generator power from the engine controller includes:

[0018] Based on the generator being directly connected to the after-treatment electric heating device via a direct drive path;

[0019] The direct drive path is achieved by a power line, ensuring that the generator directly supplies power to the post-processing electric heating device.

[0020] Optionally, in buck mode, excess power from the generator is stepped down and stored in the vehicle battery, including:

[0021] The storage operation achieves voltage reduction and energy recovery through the DC-DC function of the integrated electric heating controller.

[0022] Optionally, the calculation of electric heating power based on the post-processing required temperature includes:

[0023] The electric heating duty cycle is used as a control variable.

[0024] The electric heating duty cycle is dynamically adjusted based on the post-processing temperature requirement to accurately calculate the electric heating power.

[0025] Optionally, obtaining generator power from the engine controller includes:

[0026] This is achieved through real-time coordination via signal lines.

[0027] The signal line connects the engine controller and the integrated electric heating controller, and is used to transmit real-time data.

[0028] Optionally, determining whether the power difference is greater than zero includes:

[0029] The judgment is made with zero as a fixed threshold, which ensures the dichotomy of mode switching, and the control operation is directly triggered based on the positive or negative value of the power difference.

[0030] This application also provides an integrated electric heating control device for post-processing, comprising:

[0031] The speed module obtains the generator power from the engine controller, which is calculated by the engine controller based on the engine speed.

[0032] The temperature module calculates the electric heating power based on the post-processing temperature requirements;

[0033] The difference module calculates the power difference based on the generator power and the electric heating power;

[0034] The judgment module determines whether the power difference is greater than zero;

[0035] The decision module, based on the determined result, controls the integrated electric heating device to enter either a boost mode or a buck mode. Specifically, when the power difference is less than zero, the device is controlled to enter the boost mode, and when the power difference is greater than zero, the device is controlled to enter the buck mode.

[0036] This application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor, when executing the computer program, controls the execution of the method as described above.

[0037] This application also provides a computer-readable storage medium storing a computer program that, when executed in a computer, causes the computer to control the execution of the above-described method.

[0038] The beneficial effects of this application are:

[0039] This application provides an integrated electric heating control method for aftertreatment, comprising: obtaining generator power from an engine controller, the generator power being calculated by the engine controller based on engine speed; calculating electric heating power based on the required aftertreatment temperature; calculating a power difference based on the generator power and the electric heating power; determining whether the power difference is greater than zero; and controlling the integrated electric heating device to enter either a boost mode or a buck mode based on the determination result, wherein the boost mode is activated when the power difference is less than zero, and the buck mode is activated when the power difference is greater than zero. This application ensures stable operation of the electric heating device, improves aftertreatment performance, and meets stringent emission standards by using complementary power supply, direct-drive power supply, and power difference-based control of boost or buck modes. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the integrated electric heating control process for post-processing in this application;

[0041] Figure 2 This is a schematic diagram of the integrated electric heating architecture for post-processing in this application. Detailed Implementation

[0042] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, the embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0043] Please refer to Figure 1 As shown, this application provides an integrated electric heating control method for aftertreatment, applied in the field of engine aftertreatment control technology, to solve the problems of unstable structure, single control mode, and inability to stabilize the heating power of the electric heating device in aftertreatment electric heating systems. The method includes:

[0044] S101. Obtain generator power from engine controller, wherein the generator power is calculated by engine controller based on engine speed.

[0045] Generator power refers to the electrical power generated by a generator, measured in kilowatts (kW). Its calculation depends on the engine's operating status.

[0046] The specific calculation method derives generator power based on parameters such as engine speed:

[0047]

[0048] in, The generator power is represented by kW; the engine speed is represented by rpm; the speed ratio constant between the engine and the generator is a fixed value; the torque corresponding to the generator characteristic curve is represented by Nm; and the generator efficiency coefficient is represented by η, which reflects the generator's energy conversion efficiency.

[0049] The generator power is obtained through real-time coordination via signal lines, which are electrical connection lines used to transmit data signals and ensure real-time communication between the engine controller and the integrated electric heating controller, thereby accurately transmitting generator power data.

[0050] In addition, the generator is directly connected to the aftertreatment electric heating device via a direct drive path. The direct drive path refers to a direct power supply path achieved by a power line, which is a wire used to transmit electrical energy. This ensures that the generator can directly supply power to the electric heating device, avoiding energy loss in intermediate links.

[0051] Please refer to Figure 2 As shown, the architecture of the aftertreatment integrated electric heating control system includes an engine controller 1, a vehicle battery 2, an integrated electric heating controller 3, a generator 4, and an aftertreatment electric heating device 5. The engine controller 1 is connected to the integrated electric heating controller 3 and the generator 4 via signal lines to realize the transmission of control signals. The integrated electric heating controller 3 is connected to the vehicle battery 2, the generator 4, and the aftertreatment electric heating device 5 via power lines to form a power distribution network.

[0052] This architecture allows the generator to dynamically adjust its power output based on engine speed and prioritize power supply via direct drive, thus improving system response speed. For example, when engine speed increases, generator power increases accordingly, and engine controller 1 sends real-time power data to integrated electric heating controller 3 via signal lines, providing a basis for subsequent power comparison.

[0053] This system architecture enables complementary energy functions. The engine controller 1 adjusts the input electrical energy according to the power of the integrated electric heating device 3, while the generator 4 provides direct-drive power to ensure maximum electrical conversion efficiency. Simultaneously, the integrated electric heating controller 3 can either step down the excess power from the generator and store it in the vehicle's battery 2 or step it up from the battery 2 to supplement power, achieving dynamic energy balance. This design is the core of the entire aftertreatment electric heating system architecture, ensuring efficient collaboration between components.

[0054] S102. Calculate the electric heating power based on the post-processing temperature requirement.

[0055] The aftertreatment required temperature refers to the exhaust temperature threshold required to effectively eliminate NOx gas and PN particulate matter in the exhaust gas. This temperature is obtained through sensors in the engine controller or aftertreatment system to ensure that the heating process is highly targeted.

[0056] Electric heating power refers to the electrical power consumed by the electric heating device, measured in kilowatts (kW). Its calculation depends on the required temperature of the post-processing to dynamically adjust the heating intensity.

[0057] The specific calculation method derives the electric heating power based on the temperature requirement:

[0058]

[0059] in, β represents the electric heating power, in kW; β represents the electric heating duty cycle, in %; the duty cycle refers to the percentage of time the electric heating device operates within a cycle, used to adjust the average power; P represents the rated electric heating power, in kW, which is the maximum design power of the device; n represents the generator efficiency coefficient, reflecting the indirect impact of the generator's energy conversion efficiency on the electric heating power.

[0060] The electric heating duty cycle β is dynamically adjusted based on the post-processing temperature requirement and serves as a control variable for accurately calculating the electric heating power. For example, when the post-processing temperature requirement is high, the electric heating duty cycle β is increased accordingly to improve the electric heating power and ensure rapid heating; conversely, when the temperature requirement is low, β is decreased to save energy.

[0061] This dynamic adjustment mechanism is achieved through an integrated electric heating controller, ensuring that the heating process matches emission requirements and avoiding power waste or insufficiency.

[0062] Dynamic adjustment of the electric heating duty cycle is one of the key points to stabilizing the power of the electric heating device. By real-time feedback of the post-processing temperature demand, the power calculation accuracy can be optimized, thereby improving the reliability of the entire control method.

[0063] S103. Calculate the power difference based on the generator power and the electric heating power.

[0064] The power difference refers to the arithmetic difference between the generator power and the electric heating power, that is:

[0065]

[0066] Used to assess the balance between electricity supply and demand.

[0067] Calculating the power difference is a core step in system control, achieved through simple subtraction to ensure real-time data accuracy. For example, if the generator power... The electric heating power is 5kW. If the power is 3kW, then the power difference ΔP is 2kW, indicating that the generator power is excessive; conversely, if... It is 2kW. If the value is 4kW, then ΔP is -2kW, indicating that the generator power is insufficient.

[0068] This calculation is performed by an algorithm module within the integrated electric heating controller, based on real-time data obtained from the engine controller, ensuring that the difference accurately reflects the current operating conditions.

[0069] The calculation of the rate difference is the foundation of the entire stability control method. It is closely integrated with the power complementarity design of the system architecture, provides input for subsequent mode judgment, and ensures that the electric heating device can operate at a stable power under various operating conditions.

[0070] S104. Determine whether the power difference is greater than zero.

[0071] The determination process uses zero as a fixed threshold for judgment. The fixed threshold refers to the critical point of zero value to ensure the dichotomy of mode switching, that is, the control operation is directly triggered based on the positive or negative power difference, avoiding fuzzy judgment.

[0072] When the power difference is greater than zero, it indicates that the generator power exceeds the electric heating demand, and there is excess electrical energy; when the power difference is less than zero, it indicates that the generator power is insufficient and additional electrical energy is needed. For example, if ΔP is positive, it enters buck mode; if ΔP is negative, it enters boost mode. This judgment logic is implemented through the comparator of the integrated electric heating controller, ensuring fast and reliable response, and is suitable for various engine operating conditions.

[0073] This judgment mechanism is an innovation in control methods. It simplifies the decision-making process, directly uses the positive or negative difference to trigger actions, and improves the real-time performance and stability of the system.

[0074] S105. Based on the determined result, control the integrated electric heating device to enter either a boost mode or a buck mode, wherein when the power difference is less than zero, control it to enter the boost mode, and when the power difference is greater than zero, control it to enter the buck mode.

[0075] The control operation is performed by the DC-DC function integrated in the integrated electric heating controller to perform boost or buck operation. The DC-DC function is a DC-DC converter circuit used to adjust the voltage level.

[0076] In boost mode, when the power difference is less than zero, the DC-DC function boosts the power of the vehicle battery to supply the integrated electric heating device, in order to make up for the heating demand gap caused by insufficient generator power; the boost operation increases the current by increasing the voltage, ensuring that the electric heating device operates with stable power.

[0077] In buck mode, when the power difference is greater than zero, the DC-DC function will step down the excess power of the generator and store it in the vehicle battery to achieve energy recovery. The storage operation will safely store the excess electrical energy into the battery through buck conversion to prevent energy from being wasted as heat.

[0078] For example, when the engine is running at high speed, the generator has excess power, and the DC-DC converter enters buck mode to charge the battery with the excess power. When the engine is running at low speed, the generator has insufficient power, and the DC-DC converter enters boost mode to draw power from the battery to make up for the shortfall.

[0079] This control method, coordinated by an integrated electric heating controller, ensures that the electric heating device always operates at a stable power to meet the post-processing temperature requirements.

[0080] The control flow of the aftertreatment electric heating system in this application includes power calculation, differential judgment, and control mode, demonstrating the logical coherence of the entire method. This control method implements a complementary power supply design, reduces energy loss through direct-drive power supply, and improves efficiency through energy recovery in a step-down mode, thereby ensuring that the aftertreatment electric heating system can effectively eliminate NOx and particulate matter in the exhaust gas. The advantages of this method include wide coverage and good versatility. Through generator direct-drive power supply, battery voltage boosting, and power recovery, it ensures stable operation of the electric heating device in the vehicle.

[0081] This application also provides an integrated electric heating control device for post-processing, comprising:

[0082] The speed module obtains the generator power from the engine controller, which is calculated by the engine controller based on the engine speed.

[0083] The temperature module calculates the electric heating power based on the post-processing temperature requirements;

[0084] The difference module calculates the power difference based on the generator power and the electric heating power;

[0085] The judgment module determines whether the power difference is greater than zero;

[0086] The decision module, based on the determined result, controls the integrated electric heating device to enter either a boost mode or a buck mode. Specifically, when the power difference is less than zero, the device is controlled to enter the boost mode, and when the power difference is greater than zero, the device is controlled to enter the buck mode.

[0087] This application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor, when executing the computer program, controls the execution of the method as described above.

[0088] This application also provides a computer-readable storage medium storing a computer program that, when executed in a computer, causes the computer to control the execution of the above-described method.

Claims

1. A post-processed integrated electric heating control method, characterized by, The method comprises: obtaining generator power from an engine controller, the generator power being calculated by the engine controller based on engine speed; calculating electric heating power based on aftertreatment demand temperature; calculating a power difference value according to the generator power and the electric heating power; determining whether the power difference value is greater than zero; based on the determination result, controlling the integrated electric heating device to enter a boost mode or a step-down mode, wherein the boost mode is entered when the power difference value is less than zero, and the step-down mode is entered when the power difference value is greater than zero.

2. The method of claim 1, wherein, The control of the integrated electric heating device to enter the boost mode or the step-down mode comprises: performing a boost operation or a step-down operation through a DCDC function integrated in the integrated electric heating controller; wherein the DCDC function supplies power to the integrated electric heating device after boosting the power of a vehicle storage battery in the boost mode, and stores the excess power of the generator to the vehicle storage battery after stepping down the power in the step-down mode.

3. The method of claim 1, wherein, The obtaining of the generator power from the engine controller comprises: connecting the generator to the aftertreatment electric heating device through a direct drive path; wherein the direct drive path is realized by a power line to ensure that the generator directly supplies power to the aftertreatment electric heating device.

4. The method of claim 2, wherein, The storage of the excess power of the generator to the vehicle storage battery in the step-down mode comprises: the storage operation is realized by the DCDC function of the integrated electric heating controller to step down the power and recover the power.

5. The method of claim 1, wherein, The calculation of the electric heating power based on the aftertreatment demand temperature comprises: using an electric heating duty cycle as a control variable; wherein the electric heating duty cycle is dynamically adjusted based on the aftertreatment demand temperature to accurately calculate the electric heating power.

6. The method of claim 1, wherein, The obtaining of the generator power from the engine controller comprises: real-time coordination through a signal line; the signal line connects the engine controller and the integrated electric heating controller to transmit real-time data.

7. The method of claim 1, wherein, The determination of whether the power difference value is greater than zero comprises: using zero as a fixed threshold to determine, the fixed threshold ensuring the bisection of mode switching, and directly triggering the control operation based on the positive or negative of the power difference value.

8. A post-processed integrated electric heating control device, characterized in that, The method comprises: a speed module for obtaining generator power from an engine controller, the generator power being calculated by the engine controller based on engine speed; a temperature module for calculating electric heating power based on aftertreatment demand temperature; a difference value module for calculating a power difference value according to the generator power and the electric heating power; a judgment module for determining whether the power difference value is greater than zero; a decision module for controlling the integrated electric heating device to enter a boost mode or a step-down mode based on the determination result, wherein the boost mode is entered when the power difference value is less than zero, and the step-down mode is entered when the power difference value is greater than zero.

9. An electronic device, comprising: The method comprises a memory and a processor, the memory storing a computer program, and the processor executing the computer program to control the execution of the method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer program is stored on the computer and executed in the computer to control the execution of the method according to any one of claims 1-7.

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