A driving regeneration control method and system, an electronic device, and a storage medium

Abstract

The application provides a driving regeneration control method and system, an electronic device and a storage medium, relates to the technical field of driving regeneration, and the driving regeneration control method comprises the following steps: acquiring a vehicle working condition; determining whether to correct initial feedforward regeneration oil quantity according to the vehicle working condition, to obtain final feedforward regeneration oil quantity; and performing feedforward regeneration oil quantity compensation according to the final feedforward regeneration oil quantity. The method can identify a scenario with high DOC efficiency, and is better for warming up the driving regeneration DPF. The method does not affect the calculation of the feedforward oil quantity in the steady state working condition of the driving regeneration, and does not cause the problem of DPF over-temperature of the engine in a certain working condition in the steady state of the driving regeneration. The feedforward compensation is good when the DOC temperature gradually decreases in the reverse drag working condition. The feedforward regeneration oil quantity is limited when the carbon load is low, and the reliability problem is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of driving regeneration technology, and particularly relates to a driving regeneration control method and system, an electronic device and a storage medium. BACKGROUND

[0002] During the driving regeneration process of a diesel engine, there are low load rate working conditions with drastic changes (for example, a national highway in an unloaded state), at which time it is difficult to maintain the DPF temperature near the set value, and the regeneration efficiency is poor. During the driving regeneration process, when the DPF temperature is relatively high, the load is reduced, at which time the space velocity is reduced, the main injection amount is reduced, and the exhaust oxygen concentration is increased. At this time, the DOC efficiency should be very high in theory, but the current strategy reduces the regeneration oil amount rapidly with the exhaust flow, which affects the DPF temperature rise. SUMMARY

[0003] The present application provides a driving regeneration control method to at least solve the problems in the related art.

[0004] According to an aspect of an embodiment of the present application, a driving regeneration control method is provided, including: obtaining a vehicle working condition; determining whether to correct an initial feedforward regeneration oil amount according to the vehicle working condition to obtain a final feedforward regeneration oil amount; and performing feedforward regeneration oil amount compensation according to the final feedforward regeneration oil amount.

[0005] As an optional implementation, the determining whether to correct the initial feedforward regeneration oil amount according to the vehicle working condition to obtain the final feedforward regeneration oil amount includes: determining whether the vehicle working condition reaches a preset condition; if the vehicle working condition does not reach the preset condition, not correcting the initial feedforward regeneration oil amount, and setting the initial feedforward regeneration oil amount as the final feedforward regeneration oil amount.

[0006] As an optional implementation, the determining whether to correct the initial feedforward regeneration oil amount according to the vehicle working condition to obtain the final feedforward regeneration oil amount further includes: determining whether the vehicle working condition reaches a preset condition; if the vehicle working condition reaches the preset condition, correcting the initial feedforward regeneration oil amount, and setting the corrected feedforward regeneration oil amount as the final feedforward regeneration oil amount.

[0007] As an optional implementation, the vehicle working condition includes: a DOC space velocity, a DPF temperature actual value, and a carbon load; and the preset condition includes: the DOC space velocity being less than a preset space velocity value, a difference between a DPF temperature set value and the DPF temperature actual value being greater than a preset difference value, the carbon load being less than a preset carbon load, and the DOC temperature actual value being greater than a preset DOC temperature value.

[0008] As an optional implementation, the correcting the initial feed-forward regeneration oil amount according to the vehicle working condition comprises: correcting the initial feed-forward regeneration oil amount according to a feed-forward correction coefficient.

[0009] As an optional implementation, the feed-forward correction coefficient comprises a first feed-forward correction coefficient, a second feed-forward correction coefficient and a third feed-forward correction coefficient.

[0010] As an optional implementation, the first feed-forward correction coefficient is determined based on the carbon load and the difference between the DPF temperature set value and the DPF temperature actual value; the second feed-forward correction coefficient is determined based on the circulating oil supply amount gradient and the DPF temperature actual value; and the third feed-forward correction coefficient is determined based on the circulating oil supply amount and the DOC temperature actual value.

[0011] According to another aspect of the embodiments of the present application, there is provided a driving regeneration control system, comprising: a working condition acquisition module, configured to acquire a vehicle working condition; a correction module, configured to determine whether to correct an initial feed-forward regeneration oil amount according to the vehicle working condition, to obtain a final feed-forward regeneration oil amount; and a compensation module, configured to compensate the feed-forward regeneration oil amount according to the final feed-forward regeneration oil amount.

[0012] According to still another aspect of the embodiments of the present application, there is provided an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus, the memory is configured to store a computer program, and the processor is configured to execute the driving regeneration control method steps by running the computer program stored in the memory.

[0013] According to still another aspect of the embodiments of the present application, there is provided a computer readable storage medium, characterized in that the storage medium stores a computer program, and the computer program is configured to execute the driving regeneration control method steps when running.

[0014] In the embodiments of the present application, a driving regeneration control method is provided, which comprises: acquiring a vehicle working condition; determining whether to correct an initial feed-forward regeneration oil amount according to the vehicle working condition, to obtain a final feed-forward regeneration oil amount; and compensating the feed-forward regeneration oil amount according to the final feed-forward regeneration oil amount. The method can identify a scenario in which the DOC efficiency is high, and the driving regeneration DPF temperature raising effect is better. The method does not affect the feed-forward oil amount calculation in the driving regeneration steady state working condition, and does not cause the engine driving regeneration to be stable in a working condition DPF over-temperature problem. The DOC temperature gradually decreases in the reverse drag working condition, and the feed-forward compensation is good. When the carbon load is low, the feed-forward regeneration oil amount is limited, and the reliability problem is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 is a flow diagram of an optional driving regeneration control method provided by the embodiments of the present application. DETAILED DESCRIPTION

[0018] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described in the description of the embodiments of the present application in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative effort should belong to the scope of protection of the present application.

[0019] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0020] During the driving regeneration process of the diesel engine, there is a low load rate working condition with a drastic change (for example, a national highway in an empty state), at which time it is difficult to maintain the DPF temperature near the set value, and the regeneration efficiency is poor. During the driving regeneration process, when the DPF temperature is relatively high, the load is reduced, at which time the space velocity is reduced, the main injection amount is reduced, and the exhaust oxygen concentration is increased. At this time, the theoretical DOC efficiency should be very high, but the current strategy reduces the regeneration oil amount rapidly with the exhaust gas flow, which affects the DPF temperature rise.

[0021] As Figure 1To solve the above technical problems, the embodiment of the application provides a driving regeneration control method, which comprises the following steps:

[0022] S1 acquiring a vehicle working condition;

[0023] S2 determining whether to correct initial feed-forward regeneration oil quantity according to the vehicle working condition to obtain final feed-forward regeneration oil quantity;

[0024] S3 performing feed-forward regeneration oil quantity compensation according to the final feed-forward regeneration oil quantity.

[0025] The scene with high DOC efficiency can be identified, and the driving regeneration DPF temperature raising effect is better; the feed-forward oil quantity calculation of the driving regeneration steady state working condition is not affected, and the engine driving regeneration steady state working condition DPF over-temperature problem is avoided, wherein the DOC temperature gradually decreases in the reverse drag working condition, and the feed-forward compensation is good; when the carbon load is low, the feed-forward regeneration oil quantity is limited, and the reliability problem is reduced.

[0026] As an optional implementation, the step of determining whether to correct the initial feed-forward regeneration oil quantity according to the vehicle working condition to obtain the final feed-forward regeneration oil quantity comprises the following steps: determining whether the vehicle working condition reaches a preset condition; if the vehicle working condition does not reach the preset condition, the initial feed-forward regeneration oil quantity is not corrected, and the initial feed-forward regeneration oil quantity is set as the final feed-forward regeneration oil quantity.

[0027] When the following conditions are met, it is considered that the DOC efficiency is high, and the regeneration oil quantity compensation condition is met: the DOC air speed is less than a certain value (when the DOC is at a suitable temperature, the lower the DOC air speed, the higher the DOC efficiency), the DOC temperature is greater than a certain value (the DOC temperature is within a certain range, and the higher the temperature, the higher the DOC efficiency), the DPF temperature set value-DPF actual temperature value is greater than a certain threshold value (the actual DPF temperature is lower than the DPF temperature set value, and it is considered that the regeneration oil quantity compensation is needed at this time), and the carbon load is lower than a certain value (at the beginning of regeneration, there is more accumulated carbon in the DPF, and if the regeneration oil quantity compensation is performed at this time, there is a risk of DPF burning through, so when the carbon load is lower than a certain value, the regeneration oil quantity compensation is performed, and the reliability problem is mainly considered). When the above conditions are not met, the initial feed-forward regeneration oil quantity is not corrected, and the initial feed-forward regeneration oil quantity is directly assigned to the feed-forward regeneration oil quantity; if the above conditions are met, the initial feed-forward regeneration oil quantity is corrected and output to the feed-forward regeneration oil quantity.

[0028] As an optional implementation, the step of determining whether to correct the initial feed-forward regeneration oil quantity according to the vehicle working condition to obtain the final feed-forward regeneration oil quantity further comprises the following steps: determining whether the vehicle working condition reaches a preset condition; if the vehicle working condition reaches the preset condition, the initial feed-forward regeneration oil quantity is corrected, and the corrected feed-forward regeneration oil quantity is set as the final feed-forward regeneration oil quantity.

[0029] As an optional implementation, the vehicle working condition comprises: a DOC air speed, a DPF temperature actual value and a carbon load; and the preset condition comprises: the DOC air speed is less than a preset air speed value, a difference between a DPF temperature setting value and the DPF temperature actual value is greater than a preset difference value, the carbon load is less than a preset carbon load, and the DOC temperature actual value is greater than a preset DOC temperature value.

[0030] As an optional implementation, when the vehicle working condition reaches the preset condition, the correction of the initial feed-forward regeneration oil amount comprises: correcting the initial feed-forward regeneration oil amount according to a feed-forward correction coefficient.

[0031] As an optional implementation, the feed-forward correction coefficient comprises a first feed-forward correction coefficient, a second feed-forward correction coefficient and a third feed-forward correction coefficient.

[0032] As an optional implementation, the first feed-forward correction coefficient is determined based on the carbon load and the difference between the DPF temperature setting value and the DPF temperature actual value; the second feed-forward correction coefficient is determined based on a cycle oil supply gradient and the DPF temperature actual value; and the third feed-forward correction coefficient is determined based on a cycle oil supply and the DOC temperature actual value.

[0033] There are three feed-forward correction coefficients. The first feed-forward correction coefficient 1_MAP is a calibration MAP based on the carbon load, the difference between the DPF temperature setting value and the DPF temperature actual value. When the carbon load is smaller and the difference between the DPF temperature setting value and the DPF temperature actual value is greater, the coefficient is calibrated to be greater.

[0034] The second feed-forward correction coefficient 2_MAP is a calibration MAP based on the cycle oil supply gradient and the DOC temperature. When the cycle oil supply decreases, the main injection oil amount decreases, the oxygen concentration in the exhaust gas increases, the exhaust flow decreases, the DOC air speed decreases, and the DOC efficiency is higher when the DOC temperature is higher. At this time, the regeneration oil amount compensation can be performed. Therefore, when the cycle oil supply gradient is smaller (less than 0) and the DOC temperature is higher, the second feed-forward correction coefficient 2_MAP can be calibrated to be greater.

[0035] The third feed-forward correction coefficient 3_MAP is a calibration MAP based on the cycle oil supply and the DOC temperature. When the engine cycle oil supply is low (for example, in the motoring working condition), the exhaust flow and the DOC air speed are low. If the DOC temperature is higher than a certain value, the DOC conversion efficiency is also higher. At this time, the regeneration oil amount compensation can be performed. Therefore, when the cycle oil supply is less than a certain value and the DOC temperature is higher, the third feed-forward correction coefficient 3_MAP can be calibrated to be greater.

[0036] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0037] The integrated units in the above embodiments, if implemented in the form of software function units and sold or used as independent products, can be stored in the above computer-readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing one or more electronic devices (which can be personal computers, servers or network devices, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0038] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0039] In the several embodiments provided by the present application, it should be understood that the disclosed client can be implemented in other ways. Of course, the above device embodiment is only illustrative, and the division of the units is only a logical function division. There can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0040] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., they can be located in one place or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the scheme provided in the embodiments.

[0041] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0042] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0043] The above description is only the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be regarded as the protection scope of the present application.

Claims

1. A driving regenerative control method characterized by, The method comprises: acquiring a vehicle working condition, the vehicle working condition comprising a DOC air speed, a DOC temperature actual value, a DPF temperature actual value, and a carbon load; when the vehicle working condition meets preset conditions that the DOC air speed is less than a preset air speed value, a difference between a DPF temperature set value and the DPF temperature actual value is greater than a preset difference value, the carbon load is less than a preset carbon load, and the DOC temperature actual value is greater than a preset DOC temperature value, correcting an initial front feed regeneration oil amount according to a front feed correction coefficient to obtain a final front feed regeneration oil amount; wherein the front feed correction coefficient comprises a first front feed correction coefficient, a second front feed correction coefficient, and a third front feed correction coefficient, the carbon load and the difference between the DPF temperature set value and the DPF temperature actual value determine the first front feed correction coefficient, the second front feed correction coefficient is determined based on a circulating oil supply amount gradient and the DPF temperature actual value, and the third front feed correction coefficient is determined based on a circulating oil supply amount and the DOC temperature actual value; performing front feed regeneration oil amount compensation according to the final front feed regeneration oil amount.

2. The driving regeneration control method of claim 1, wherein, if the vehicle working condition does not meet the preset conditions, the initial front feed regeneration oil amount is not corrected, and the initial front feed regeneration oil amount is set as the final front feed regeneration oil amount.

3. The driving regenerative control method according to claim 1, characterized by, if the vehicle working condition meets the preset conditions, the initial front feed regeneration oil amount is corrected, and the corrected front feed regeneration oil amount is set as the final front feed regeneration oil amount.

4. A drive regenerative control system characterized by comprising: The method comprises: a working condition acquisition module configured to acquire a vehicle working condition, the vehicle working condition comprising a DOC air speed, a DOC temperature actual value, a DPF temperature actual value, and a carbon load; a correction module configured to, when the vehicle working condition meets preset conditions that the DOC air speed is less than a preset air speed value, a difference between a DPF temperature set value and the DPF temperature actual value is greater than a preset difference value, the carbon load is less than a preset carbon load, and the DOC temperature actual value is greater than a preset DOC temperature value, correct an initial front feed regeneration oil amount according to a front feed correction coefficient to obtain a final front feed regeneration oil amount; wherein the front feed correction coefficient comprises a first front feed correction coefficient, a second front feed correction coefficient, and a third front feed correction coefficient, the carbon load and the difference between the DPF temperature set value and the DPF temperature actual value determine the first front feed correction coefficient, the second front feed correction coefficient is determined based on a circulating oil supply amount gradient and the DPF temperature actual value, and the third front feed correction coefficient is determined based on a circulating oil supply amount and the DOC temperature actual value; a compensation module configured to perform front feed regeneration oil amount compensation according to the final front feed regeneration oil amount.

5. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein, The processor, the communication interface, and the memory complete communication with each other through the communication bus, and the method comprises the following steps: The memory is configured to store a computer program. The processor is configured to execute the driving regeneration control method steps of any one of claims 1 to 3 by running the computer program stored on the memory.

6. A computer readable storage medium, characterized in that, The storage medium has stored therein a computer program, wherein the computer program is configured to execute the driving regeneration control method steps of any one of claims 1 to 3 when running.

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