Control method and device for active regeneration temperature of DPF and electronic equipment

Abstract

The invention provides a DPF active regeneration temperature control method and device and electronic equipment.The method comprises the steps that a first autonomous learning coefficient corresponding to a running working condition is determined based on the running working condition of a vehicle, and the first autonomous learning coefficient is the first autonomous learning coefficient corresponding to the running working condition when the vehicle is under the running working condition; the target downstream regeneration temperature is obtained through calculation based on the historical downstream temperature and the target downstream regeneration temperature; under the operation working condition, the first open-loop fuel injection quantity is calculated based on the current upstream temperature, the exhaust gas specific heat capacity, the exhaust gas flow, the calibration conversion efficiency, the target downstream regeneration temperature and the first autonomous learning coefficient; and under the condition that the downstream temperature after injection of the first open-loop fuel injection quantity is equal to the target downstream regeneration temperature, control over the active regeneration temperature of the DPF is completed, and therefore under the condition that the downstream temperature after injection of the first open-loop fuel injection quantity is equal to the target downstream regeneration temperature, only the open-loop fuel injection quantity is used for controlling the active regeneration temperature of the DPF, and the control over the active regeneration temperature of the DPF is achieved. And the temperature control efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of active regeneration of diesel engines, and in particular to a method, a device and an electronic device for controlling the active regeneration temperature of a DPF. Background Art

[0002] In diesel engine emission control systems, the Diesel Oxidation Catalyst (DOC) and the Diesel Particulate Filter (DPF) usually work together to reduce the emission of harmful gases. The exhaust gas reduces harmful gases through oxidation reactions in the DOC, while the DPF captures particulate matter.

[0003] During active regeneration, the hot exhaust gas produced by the DOC helps to increase the temperature of the DPF to the temperature required to burn particulate matter, thereby achieving particulate matter removal. This synergistic effect helps meet increasingly stringent emission standards and reduce the impact of diesel engines on the environment.

[0004] In the prior art, the active regeneration temperature of the DPF is usually controlled by combining an open-loop control of the fuel injection amount with a closed-loop control of the fuel injection amount, and performing two fuel injection amounts, which results in low temperature control efficiency. Summary of the invention

[0005] The present application provides a method, device and electronic device for controlling the active regeneration temperature of a DPF, so as to solve the problem of low control efficiency of the active regeneration temperature of a DPF in the prior art.

[0006] In a first aspect, the present application provides a method for controlling the active regeneration temperature of a DPF, the method comprising: Based on the operating condition of the vehicle, determining a first autonomous learning coefficient corresponding to the operating condition, wherein the first autonomous learning coefficient is calculated by the vehicle under the operating condition based on a historical downstream temperature and a target downstream regeneration temperature, the historical downstream temperature being a downstream temperature after a second open-loop fuel injection amount is completed, and the second open-loop fuel injection amount is an open-loop fuel injection amount in the control of the last active regeneration temperature of the DPF; Under the operating condition, calculating a first open-loop fuel injection amount based on a current upstream temperature, a specific heat capacity of exhaust gas, an exhaust gas flow rate, a calibrated conversion efficiency, the target downstream regeneration temperature, and the first autonomous learning coefficient; When the downstream temperature after the first open-loop fuel injection amount is injected is equal to the target downstream regeneration temperature, the active regeneration temperature of the DPF is controlled.

[0007] In a possible implementation, the method further includes: When the downstream temperature after the first open-loop fuel injection amount is injected is less than the target downstream regeneration temperature, calculating the first closed-loop fuel injection amount based on the target downstream regeneration temperature and the downstream temperature after the first open-loop fuel injection amount is injected; After the first closed-loop fuel injection amount is injected, the active regeneration temperature of the DPF is controlled.

[0008] In a possible implementation, the method further includes: calculating a second autonomous learning coefficient based on the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The second autonomous learning coefficient is adopted to replace the first autonomous learning coefficient corresponding to the operating condition, so that the second autonomous learning coefficient is used when the first open-loop fuel injection amount under the operating condition is calculated next time.

[0009] In a possible implementation, the calculating the second autonomous learning coefficient based on the first open-loop fuel injection amount and the closed-loop fuel injection amount includes: Calculating a first sum of the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The correlation between the first sum and the first open-loop fuel injection amount is calculated, and the correlation calculation result is used as the second autonomous learning coefficient.

[0010] In a possible implementation, calculating the correlation between the first sum and the first open-loop fuel injection amount includes: Based on a target calculation method, the correlation between the first sum and the first open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0011] In a possible implementation, the first autonomous learning coefficient is calculated in the following manner: Calculating a second open-loop fuel injection amount based on a historical current upstream temperature, the exhaust gas specific heat capacity, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature, and a third autonomous learning coefficient, wherein the historical current upstream temperature is the upstream temperature before the control of the last active regeneration temperature of the DPF is performed, and the third autonomous learning coefficient is the autonomous learning coefficient corresponding to the control of the last active regeneration temperature of the DPF; calculating a second closed-loop fuel injection amount based on the target downstream regeneration temperature and the historical downstream temperature; The first autonomous learning coefficient is calculated based on the second open-loop fuel injection amount and the second closed-loop fuel injection amount.

[0012] In a possible implementation, the calculating the first autonomous learning coefficient based on the second open-loop fuel injection amount and the second closed-loop fuel injection amount includes: Calculating a second sum of the second open-loop injection amount and the second closed-loop injection amount; The correlation between the second sum and the second open-loop fuel injection amount is calculated, and the correlation calculation result is used as the first autonomous learning coefficient.

[0013] In a possible implementation, the calculating the correlation between the second sum and the second open-loop fuel injection amount includes: Based on a target calculation method, the correlation between the second sum and the second open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0014] In a second aspect, the present application provides a device for controlling the active regeneration temperature of a DPF, the device comprising: a calculation module, configured to determine, based on an operating condition of the vehicle, a first autonomous learning coefficient corresponding to the operating condition, wherein the first autonomous learning coefficient is calculated by the vehicle under the operating condition based on a historical downstream temperature and a target downstream regeneration temperature, the historical downstream temperature being a downstream temperature after a second open-loop fuel injection amount is completed, and the second open-loop fuel injection amount is an open-loop fuel injection amount in the control of a previous active regeneration temperature of the DPF; Under the operating condition, calculating a first open-loop fuel injection amount based on a current upstream temperature, a specific heat capacity of exhaust gas, an exhaust gas flow rate, a calibrated conversion efficiency, the target downstream regeneration temperature, and the first autonomous learning coefficient; The control module is used to complete the control of the active regeneration temperature of the DPF when the downstream temperature after the first open-loop fuel injection amount is injected is equal to the target downstream regeneration temperature.

[0015] In a third aspect, the present application provides an electronic device, including: Memory for storing computer programs; A processor is connected to the memory, and is used to execute computer instructions in the memory, and implement the method as described in any one of the first aspects when executing the computer instructions.

[0016] The beneficial effects of this application are as follows: The present application provides a method, device and electronic device for controlling the active regeneration temperature of a DPF. The method includes determining a first autonomous learning coefficient corresponding to the operating condition based on the operating condition of a vehicle, wherein the first autonomous learning coefficient is calculated based on a historical downstream temperature and a target downstream regeneration temperature under the operating condition of the vehicle, the historical downstream temperature is the downstream temperature after the second open-loop fuel injection is completed, and the second open-loop fuel injection is the open-loop fuel injection in the control of the active regeneration temperature of the DPF last time; under the operating condition, the first open-loop fuel injection is calculated based on the current upstream temperature, the specific heat capacity of the exhaust gas, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature and the first autonomous learning coefficient; when the downstream temperature after the first open-loop fuel injection is completed is equal to the target downstream regeneration temperature, the active regeneration temperature of the DPF is controlled, so that when the downstream temperature after the first open-loop fuel injection is completed is equal to the target downstream regeneration temperature, only the open-loop fuel injection is used to control the active regeneration temperature of the DPF, which improves the efficiency of temperature control compared to performing two injections. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic flow chart of a method for controlling the active regeneration temperature of a DPF provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a diesel engine aftertreatment system provided in an embodiment of the present application; Figure 3 A schematic diagram of a flow chart for calculating a first autonomous learning coefficient provided in an embodiment of the present application; Figure 4 A schematic diagram of a flow chart for calculating a first closed-loop fuel injection amount provided in an embodiment of the present application; Figure 5 A schematic flow chart of another method for controlling the active regeneration temperature of a DPF provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a control device for active regeneration temperature of a DPF provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0021] The DPF regeneration temperature control method usually adopts a combination of open-loop fuel injection and closed-loop fuel injection, that is, the open-loop fuel injection is firstly injected, and then the closed-loop fuel injection is injected, and the fuel injection is performed twice, resulting in low efficiency of temperature control.

[0022] In order to solve the above problems, the present application provides a method for controlling the active regeneration temperature of a DPF, such as Figure 1 FIG. 1 is a flow chart of a method for controlling the active regeneration temperature of a DPF provided in an embodiment of the present application, which specifically includes: S101: Based on the operating condition of the vehicle, determining a first autonomous learning coefficient corresponding to the operating condition, wherein the first autonomous learning coefficient is calculated based on a historical downstream temperature and a target downstream regeneration temperature of the vehicle under the operating condition, wherein the historical downstream temperature is a downstream temperature after a second open-loop fuel injection amount is completed, and the second open-loop fuel injection amount is an open-loop fuel injection amount corresponding to the control of the active regeneration temperature of the DPF last time; S102: Under the operating condition, calculating a first open-loop fuel injection amount based on a current upstream temperature, a specific heat capacity of exhaust gas, an exhaust gas flow rate, a calibrated conversion efficiency, a target downstream regeneration temperature, and a first autonomous learning coefficient; S103: When the downstream temperature after the first open-loop fuel injection amount is injected is equal to the target downstream regeneration temperature, the active regeneration temperature of the DPF is controlled.

[0023] A method for controlling the active regeneration temperature of a DPF provided in an embodiment of the present application comprises: firstly, based on the operating condition of a vehicle, determining a first autonomous learning coefficient corresponding to the operating condition, wherein the first autonomous learning coefficient is calculated based on a historical downstream temperature and a target downstream regeneration temperature under the operating condition of the vehicle, the historical downstream temperature being the downstream temperature after the second open-loop fuel injection is completed, and the second open-loop fuel injection is the open-loop fuel injection in the control of the active regeneration temperature of the DPF last time; under the operating condition, the first open-loop fuel injection is calculated based on the current upstream temperature, the specific heat capacity of the exhaust gas, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature and the first autonomous learning coefficient; when the downstream temperature after the first open-loop fuel injection is completed is equal to the target downstream regeneration temperature, the active regeneration temperature of the DPF is controlled, thereby when the downstream temperature after the first open-loop fuel injection is completed is equal to the target downstream regeneration temperature, only the open-loop fuel injection is used to control the active regeneration temperature of the DPF, thereby improving the efficiency of temperature control compared to performing two fuel injections.

[0024] It should be noted that the operating conditions of a diesel engine are usually determined by parameters such as the engine's operating speed and load. In specific implementations, different operating conditions correspond to different exhaust gas specific heat capacities, exhaust gas flow rates, and calibrated conversion efficiencies. For example, operating condition A corresponds to an exhaust gas specific heat capacity of c1, an exhaust gas flow rate of m1, and a calibrated conversion efficiency of η1; operating condition B corresponds to an exhaust gas specific heat capacity of c2, an exhaust gas flow rate of m2, and a calibrated conversion efficiency of η2.

[0025] In an embodiment of the present application, the operating condition of the vehicle is first determined, and then a first autonomous learning coefficient corresponding to the operating condition is determined. The first autonomous learning coefficient is calculated based on the historical downstream temperature and the target downstream regeneration temperature of the vehicle under the operating condition.

[0026] Specifically, the corresponding relationship between the operating condition and the first autonomous learning coefficient can be established in advance, and then the first autonomous learning coefficient corresponding to the operating condition can be determined from the corresponding relationship. The first autonomous learning coefficient can also be calculated after the operating condition is determined. Regardless of which method is used, the calculation of the first autonomous learning coefficient is obtained by the vehicle under the operating condition based on the historical downstream temperature and the target downstream regeneration temperature. The difference is that when the corresponding relationship between the operating condition and the first autonomous learning coefficient is established in advance, the first autonomous learning coefficient can be calculated during the control process of the last active regeneration temperature of the DPF, and then the corresponding relationship between the operating condition and the first autonomous learning coefficient is established. After the operating condition is determined, when the first autonomous learning coefficient is calculated, the first autonomous learning coefficient is calculated after the control of the last active regeneration temperature of the DPF is completed. The parameters used in calculating the first autonomous learning coefficient can be recorded during the control process of the last active regeneration temperature of the DPF.

[0027] The following is an explanation by taking the pre-established correspondence between the operating condition and the first autonomous learning coefficient as an example.

[0028] During the control process of the last active regeneration temperature of the DPF, the second open-loop fuel injection amount is first calculated based on the historical current upstream temperature, the exhaust gas specific heat capacity, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature and the third autonomous learning coefficient. The historical current upstream temperature is the upstream temperature before executing the control of the last active regeneration temperature of the DPF. If the control of the last active regeneration temperature of the DPF is the control of the first active regeneration temperature of the DPF, the third autonomous learning coefficient is the initial autonomous learning coefficient, which can be 1. If the control of the last active regeneration temperature of the DPF is not the control of the first active regeneration temperature of the DPF, the third autonomous learning coefficient is calculated during the control of the last active regeneration temperature of the DPF.

[0029] It should be noted that the control of the active regeneration temperature of the DPF the last time before is the control of the active regeneration temperature of the DPF the last time before.

[0030] For example, under operating condition A, the difference between the target downstream regeneration temperature t1 and the historical current upstream temperature t2 is first calculated, and then the first product of the difference and the exhaust gas specific heat capacity c1, the exhaust gas flow rate m1, and the calibrated conversion efficiency η1 is calculated. The first product is represented by the energy Q1 required to increase the historical current upstream temperature t2 to the target downstream regeneration temperature t1, that is, ; Calculate the quotient of energy Q1 and the preset fuel calorific value H, then calculate the second product of the quotient and the third autonomous learning coefficient β3, and use the second product as the second open-loop injection amount M A2 ,Right now .

[0031] After calculating the second open-loop fuel injection amount, the injection of the second open-loop fuel injection amount is executed. After the injection of the second open-loop fuel injection amount is completed, the downstream temperature after the second open-loop fuel injection amount is completed is determined. After determining that the downstream temperature after the second open-loop fuel injection amount is completed is less than the target downstream regeneration temperature, the second closed-loop fuel injection amount is calculated. The specific calculation method of the second closed-loop fuel injection amount can refer to the calculation method provided in the relevant technology, which will not be repeated here.

[0032] After the second closed-loop fuel injection amount is calculated, the first autonomous learning coefficient is calculated based on the second open-loop fuel injection amount and the second closed-loop fuel injection amount.

[0033] Specifically, the second sum of the second open-loop fuel injection amount and the second closed-loop fuel injection amount is calculated; the correlation between the above sum and the second open-loop fuel injection amount is calculated based on the target calculation method, and the correlation calculation result is used as the first autonomous learning coefficient, and the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0034] For example, the calculated second closed-loop injection amount is M B2 The target calculation method is the linear fitting calculation method, and the second open-loop injection amount M is calculated. A2 and the second closed-loop injection quantity M B2 Calculate the second sum and the second open-loop injection amount M A2 The quotient value is used as the first autonomous learning coefficient β1, that is, .

[0035] It should be noted that since the active regeneration temperature of the DPF needs to be controlled this time, it means that the last active regeneration temperature control of the DPF failed to reach the target downstream regeneration temperature. Therefore, during the last active regeneration temperature control of the DPF, the second open-loop fuel injection amount will not be equal to 0.

[0036] The above is an explanation of the calculation of the first autonomous learning coefficient. The following is an explanation of the current upstream temperature and downstream temperature used in calculating the first autonomous learning coefficient.

[0037] like Figure 2 As shown, it is a structural schematic diagram of a diesel engine after-treatment system provided in an embodiment of the present application, and the after-treatment system includes a DOC pre-temperature sensor T1, a DOC, a DPF pre-temperature sensor T2, a DPF, a SCR pre-temperature sensor T3, an SCR, an ASR and a SCR post-temperature sensor.

[0038] Exhaust gas from Figure 2 The diesel engine after-treatment system shown in the figure flows from the right side to the left side, and the exhaust gas passes through the DOC, DPF, SCR and ASR in sequence. The DOC pre-temperature sensor T1 is set on the exhaust pipe before the DOC, and the DPF pre-temperature sensor T2 is set on the exhaust pipe before the DPF. The current upstream temperature is measured by the DOC pre-temperature sensor T1, and the downstream temperature is measured by the DPF pre-temperature sensor T2.

[0039] like Figure 3 , which is a schematic diagram of a flow chart of calculating a first autonomous learning coefficient provided in an embodiment of the present application; S301: Calculating a second open-loop fuel injection amount based on the historical current upstream temperature, exhaust gas specific heat capacity, exhaust gas flow rate, calibrated conversion efficiency, target downstream regeneration temperature and a third autonomous learning coefficient; S302: calculating a second closed-loop fuel injection amount based on a target downstream regeneration temperature and a historical downstream temperature after the second open-loop fuel injection amount is completed; S303: Calculating a second sum of a second open-loop fuel injection amount and a second closed-loop fuel injection amount; S304: Calculate the correlation between the above sum and the second open-loop fuel injection amount based on the target calculation method, and use the correlation calculation result as the first autonomous learning coefficient.

[0040] The correlation between the second sum and the second open-loop fuel injection amount is calculated based on a target calculation method, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0041] In one embodiment, when the downstream temperature after the first open-loop fuel injection amount is injected is less than the target downstream regeneration temperature, the first closed-loop fuel injection amount is calculated based on the target downstream regeneration temperature and the downstream temperature after the first open-loop fuel injection amount is injected; after the first closed-loop fuel injection amount is injected, the active regeneration temperature of the DPF is controlled.

[0042] Specifically, Figure 4 As shown, it is a schematic diagram of a flow chart of calculating the first closed-loop fuel injection amount provided by an embodiment of the present application; S401: Determine that the downstream temperature after the first open-loop fuel injection amount is injected is less than a target downstream regeneration temperature; S402: Calculating the temperature difference between the target downstream regeneration temperature and the aforementioned downstream temperature; S403: Calculating the fuel injection amount corresponding to the temperature difference value, and using the fuel injection amount as the first closed-loop fuel injection amount; S404: After the first closed-loop fuel injection amount is injected, the active regeneration temperature of the DPF is controlled.

[0043] For example, under operating condition A, the first open-loop injection amount M is determined A1 The downstream temperature after injection is completed is less than the target downstream regeneration temperature t1. Calculate the temperature difference between the target downstream regeneration temperature t1 and the above downstream temperature. ; Calculate temperature difference The corresponding injection amount is used as the first closed-loop injection amount M B1 , if the first closed-loop injection amount M B1When the downstream temperature after the injection is completed is equal to the target downstream regeneration temperature t1, the control of the active regeneration temperature of the DPF is completed.

[0044] In one embodiment, after completing the control of the active regeneration temperature of the DPF, a second autonomous learning coefficient is calculated based on the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The second autonomous learning coefficient is adopted to replace the first autonomous learning coefficient corresponding to the operating condition, so that the second autonomous learning coefficient is used when the first open-loop injection amount under the operating condition is calculated next time.

[0045] Specifically, Figure 5 , which is a flow chart of another method for controlling the active regeneration temperature of a DPF provided in an embodiment of the present application; S501: Calculating a first sum of a first open-loop fuel injection amount and a first closed-loop fuel injection amount; S502: calculating the correlation between the first sum and the first open-loop fuel injection amount based on the target calculation method, and using the correlation calculation result as the second autonomous learning coefficient; S503: Using the second autonomous learning coefficient to replace the first autonomous learning coefficient corresponding to the operating condition.

[0046] Among them, the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0047] For example, under operating condition A, the first open-loop injection amount M is calculated A1 and the first closed-loop injection amount M B1 The first sum of; If the target calculation method is the linear fitting calculation method, calculate the first sum and the first open-loop injection amount M A1 The quotient value is taken as the second autonomous learning coefficient β2, and the second autonomous learning coefficient β2 is used to replace the first autonomous learning coefficient β1 corresponding to the operating condition A.

[0048] Since the downstream temperature after the first open-loop fuel injection is completed during the control of the active regeneration temperature of the DPF is less than the target downstream regeneration temperature, the next active regeneration temperature of the DPF needs to be controlled. During the control of the next active regeneration temperature of the DPF, the first autonomous learning coefficient corresponding to the operating condition A is determined to be β2, and the first open-loop fuel injection amount M under the operating condition A is calculated. A2 When the first open-loop fuel injection amount is calculated based on the current upstream temperature, the exhaust gas specific heat capacity, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature and the first autonomous learning coefficient β2.

[0049] Based on the same inventive concept, an embodiment of the present application also provides a control device for the active regeneration temperature of a DPF. The principle of the control device in solving the technical problem is similar to the principle of the control method for the active regeneration temperature of the DPF in solving the technical problem. The implementation of the control device can refer to the implementation of the control method, and the repeated parts will not be repeated.

[0050] like Figure 6 FIG. 1 is a schematic diagram of a structure of a control device for active regeneration temperature of a DPF provided in an embodiment of the present application, wherein the device comprises: A calculation module 601 is used to determine a first autonomous learning coefficient corresponding to the operating condition based on the operating condition of the vehicle, wherein the first autonomous learning coefficient is calculated by the vehicle under the operating condition based on a historical downstream temperature and a target downstream regeneration temperature, the historical downstream temperature is the downstream temperature after the second open-loop fuel injection amount is completed, and the second open-loop fuel injection amount is the open-loop fuel injection amount in the control of the active regeneration temperature of the DPF last time; Under the operating condition, calculating a first open-loop fuel injection amount based on a current upstream temperature, a specific heat capacity of exhaust gas, an exhaust gas flow rate, a calibrated conversion efficiency, a target downstream regeneration temperature, and the first autonomous learning coefficient; The control module 602 is used to complete the control of the active regeneration temperature of the DPF when the downstream temperature after the first open-loop fuel injection amount is injected is equal to the target downstream regeneration temperature.

[0051] In one embodiment, the calculation module 601 is used to: When the downstream temperature after the first open-loop fuel injection amount is injected is less than the target downstream regeneration temperature, calculating the first closed-loop fuel injection amount based on the target downstream regeneration temperature and the downstream temperature after the first open-loop fuel injection amount is injected; The control module 602 is used to control the active regeneration temperature of the DPF after the first closed-loop fuel injection amount is injected.

[0052] In one embodiment, the calculation module 601 is further configured to: calculating a second autonomous learning coefficient based on the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The second autonomous learning coefficient is adopted to replace the first autonomous learning coefficient corresponding to the operating condition, so that the second autonomous learning coefficient is used when the first open-loop fuel injection amount under the operating condition is calculated next time.

[0053] In one embodiment, the calculation module 601 is specifically used for: Calculating a first sum of the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The correlation between the first sum and the first open-loop fuel injection amount is calculated, and the correlation calculation result is used as the second autonomous learning coefficient.

[0054] In one embodiment, the calculation module 601 is specifically used for: Based on a target calculation method, the correlation between the first sum and the first open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0055] In one embodiment, the calculation module 601 is further configured to: Calculating a second open-loop fuel injection amount based on a historical current upstream temperature, the exhaust gas specific heat capacity, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature, and a third autonomous learning coefficient, wherein the historical current upstream temperature is the upstream temperature before the control of the last active regeneration temperature of the DPF is performed, and the third autonomous learning coefficient is the autonomous learning coefficient corresponding to the control of the last active regeneration temperature of the DPF; calculating a second closed-loop fuel injection amount based on the target downstream regeneration temperature and the historical downstream temperature; The first autonomous learning coefficient is calculated based on the second open-loop fuel injection amount and the second closed-loop fuel injection amount.

[0056] In one embodiment, the calculation module 601 is specifically used for: Calculating a second sum of the second open-loop injection amount and the second closed-loop injection amount; The correlation between the second sum and the second open-loop fuel injection amount is calculated, and the correlation calculation result is used as the first autonomous learning coefficient.

[0057] In one embodiment, the calculation module 601 is specifically used for: Based on a target calculation method, the correlation between the second sum and the second open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0058] Based on the same inventive concept, an embodiment of the present application also provides an electronic device. The principle of the electronic device in solving the technical problem is similar to the principle of the above-mentioned DPF active regeneration temperature control method in solving the technical problem. The implementation of the electronic device can refer to the implementation of the control method, and the repeated parts will not be repeated.

[0059] like Figure 7, which is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application, the electronic device includes a processor 701 and a memory 702; Memory 702, for storing computer instructions; The processor 701 is connected to the memory 702 and is used to execute the computer instructions in the memory 702, and implements the following steps when executing the computer instructions: Based on the operating condition of the vehicle, determining a first autonomous learning coefficient corresponding to the operating condition, wherein the first autonomous learning coefficient is calculated by the vehicle under the operating condition based on a historical downstream temperature and a target downstream regeneration temperature, the historical downstream temperature being a downstream temperature after a second open-loop fuel injection amount is completed, and the second open-loop fuel injection amount is an open-loop fuel injection amount in the control of the last active regeneration temperature of the DPF; Under the operating condition, calculating a first open-loop fuel injection amount based on a current upstream temperature, a specific heat capacity of exhaust gas, an exhaust gas flow rate, a calibrated conversion efficiency, the target downstream regeneration temperature, and the first autonomous learning coefficient; When the downstream temperature after the first open-loop fuel injection amount is injected is equal to the target downstream regeneration temperature, the active regeneration temperature of the DPF is controlled.

[0060] In one embodiment, the processor 701 is further configured to: When the downstream temperature after the first open-loop fuel injection amount is injected is less than the target downstream regeneration temperature, calculating the first closed-loop fuel injection amount based on the target downstream regeneration temperature and the downstream temperature after the first open-loop fuel injection amount is injected; After the first closed-loop fuel injection amount is injected, the active regeneration temperature of the DPF is controlled.

[0061] In one embodiment, the processor 701 is further configured to: calculating a second autonomous learning coefficient based on the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The second autonomous learning coefficient is adopted to replace the first autonomous learning coefficient corresponding to the operating condition, so that the second autonomous learning coefficient is used when the first open-loop fuel injection amount under the operating condition is calculated next time.

[0062] In one embodiment, the processor 701 is specifically configured to: Calculating a first sum of the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The correlation between the first sum and the first open-loop fuel injection amount is calculated, and the correlation calculation result is used as the second autonomous learning coefficient.

[0063] In one embodiment, the processor 701 is specifically configured to: Based on a target calculation method, the correlation between the first sum and the first open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0064] In one embodiment, the processor 701 is further configured to: Calculating a second open-loop fuel injection amount based on a historical current upstream temperature, the exhaust gas specific heat capacity, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature, and a third autonomous learning coefficient, wherein the historical current upstream temperature is the upstream temperature before the control of the last active regeneration temperature of the DPF is performed, and the third autonomous learning coefficient is the autonomous learning coefficient corresponding to the control of the last active regeneration temperature of the DPF; calculating a second closed-loop fuel injection amount based on the target downstream regeneration temperature and the historical downstream temperature; The first autonomous learning coefficient is calculated based on the second open-loop fuel injection amount and the second closed-loop fuel injection amount.

[0065] In one embodiment, the processor 701 is further configured to: Calculating a second sum of the second open-loop injection amount and the second closed-loop injection amount; The correlation between the second sum and the second open-loop fuel injection amount is calculated, and the correlation calculation result is used as the first autonomous learning coefficient.

[0066] In one embodiment, the processor 701 is specifically configured to: Based on a target calculation method, the correlation between the second sum and the second open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

[0067] The present application provides a method, device and electronic device for controlling the active regeneration temperature of a DPF. The method includes determining a first autonomous learning coefficient corresponding to the operating condition based on the operating condition of a vehicle, wherein the first autonomous learning coefficient is calculated based on a historical downstream temperature and a target downstream regeneration temperature under the operating condition of the vehicle, the historical downstream temperature is the downstream temperature after the second open-loop fuel injection is completed, and the second open-loop fuel injection is the open-loop fuel injection in the control of the active regeneration temperature of the DPF last time; under the operating condition, the first open-loop fuel injection is calculated based on the current upstream temperature, the specific heat capacity of the exhaust gas, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature and the first autonomous learning coefficient; when the downstream temperature after the first open-loop fuel injection is completed is equal to the target downstream regeneration temperature, the active regeneration temperature of the DPF is controlled, so that when the downstream temperature after the first open-loop fuel injection is completed is equal to the target downstream regeneration temperature, only the open-loop fuel injection is used to control the active regeneration temperature of the DPF, which improves the efficiency of temperature control compared to performing two injections.

[0068] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0069] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0070] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling the active regeneration temperature of a DPF, characterized in that: The method comprises: Based on the operating condition of the vehicle, determining a first autonomous learning coefficient corresponding to the operating condition, wherein the first autonomous learning coefficient is calculated by the vehicle under the operating condition based on a historical downstream temperature and a target downstream regeneration temperature, the historical downstream temperature being a downstream temperature after a second open-loop fuel injection amount is completed, and the second open-loop fuel injection amount is an open-loop fuel injection amount in the control of the last active regeneration temperature of the DPF; Under the operating condition, calculating a first open-loop fuel injection amount based on a current upstream temperature, a specific heat capacity of exhaust gas, an exhaust gas flow rate, a calibrated conversion efficiency, the target downstream regeneration temperature, and the first autonomous learning coefficient; When the downstream temperature after the first open-loop fuel injection amount is injected is equal to the target downstream regeneration temperature, the active regeneration temperature of the DPF is controlled.

2. The method according to claim 1, characterized in that: The method further comprises: When the downstream temperature after the first open-loop fuel injection amount is injected is less than the target downstream regeneration temperature, calculating the first closed-loop fuel injection amount based on the target downstream regeneration temperature and the downstream temperature after the first open-loop fuel injection amount is injected; After the first closed-loop fuel injection amount is injected, the active regeneration temperature of the DPF is controlled.

3. The method according to claim 2, characterized in that The method further comprises: calculating a second autonomous learning coefficient based on the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The second autonomous learning coefficient is adopted to replace the first autonomous learning coefficient corresponding to the operating condition, so that the second autonomous learning coefficient is used when the first open-loop fuel injection amount under the operating condition is calculated next time.

4. The method according to claim 3, characterized in that The calculating a second autonomous learning coefficient based on the first open-loop fuel injection amount and the closed-loop fuel injection amount includes: Calculating a first sum of the first open-loop fuel injection amount and the first closed-loop fuel injection amount; The correlation between the first sum and the first open-loop fuel injection amount is calculated, and the correlation calculation result is used as the second autonomous learning coefficient.

5. The method according to claim 4, characterized in that The calculating the correlation between the first sum value and the first open-loop fuel injection amount includes: Based on a target calculation method, the correlation between the first sum and the first open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

6. The method according to claim 1, characterized in that The first autonomous learning coefficient is calculated in the following way: Calculating a second open-loop fuel injection amount based on a historical current upstream temperature, the exhaust gas specific heat capacity, the exhaust gas flow rate, the calibrated conversion efficiency, the target downstream regeneration temperature, and a third autonomous learning coefficient, wherein the historical current upstream temperature is the upstream temperature before the control of the last active regeneration temperature of the DPF is performed, and the third autonomous learning coefficient is the autonomous learning coefficient corresponding to the control of the last active regeneration temperature of the DPF; calculating a second closed-loop fuel injection amount based on the target downstream regeneration temperature and the historical downstream temperature; The first autonomous learning coefficient is calculated based on the second open-loop fuel injection amount and the second closed-loop fuel injection amount.

7. The method according to claim 6, characterized in that The calculating the first autonomous learning coefficient based on the second open-loop fuel injection amount and the second closed-loop fuel injection amount includes: Calculating a second sum of the second open-loop injection amount and the second closed-loop injection amount; The correlation between the second sum and the second open-loop fuel injection amount is calculated, and the correlation calculation result is used as the first autonomous learning coefficient.

8. The method according to claim 7, characterized in that The calculating the correlation between the second sum value and the second open-loop fuel injection amount includes: Based on a target calculation method, the correlation between the second sum and the second open-loop fuel injection amount is calculated, wherein the target calculation method includes one of the following: basic multiplication and division, normal distribution calculation method, sliding average calculation method, linear fitting calculation method, polynomial fitting calculation method, neural network processing nonlinear relationship calculation method.

9. A control device for active regeneration temperature of DPF, characterized in that: The device comprises: a calculation module, configured to determine, based on an operating condition of the vehicle, a first autonomous learning coefficient corresponding to the operating condition, wherein the first autonomous learning coefficient is calculated by the vehicle under the operating condition based on a historical downstream temperature and a target downstream regeneration temperature, the historical downstream temperature being a downstream temperature after a second open-loop fuel injection amount is completed, and the second open-loop fuel injection amount is an open-loop fuel injection amount in the control of a previous active regeneration temperature of the DPF; Under the operating condition, calculating a first open-loop fuel injection amount based on a current upstream temperature, a specific heat capacity of exhaust gas, an exhaust gas flow rate, a calibrated conversion efficiency, the target downstream regeneration temperature, and the first autonomous learning coefficient; The control module is used to complete the control of the active regeneration temperature of the DPF when the downstream temperature after the first open-loop fuel injection amount is injected is equal to the target downstream regeneration temperature.

10. An electronic device, characterized in that: include: Memory for storing computer programs; A processor is connected to the memory, and is used to execute computer instructions in the memory, and implement the method according to any one of claims 1 to 8 when executing the computer instructions.

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