Driving regeneration control method and system, electronic equipment and storage medium

Abstract

The invention provides a driving regeneration control method and system, electronic equipment and a storage medium, and relates to the technical field of driving regeneration. Whether the initial feed-forward regenerated oil quantity is corrected or not is judged according to the vehicle working condition, and the final feed-forward regenerated oil quantity is obtained; and feed-forward regenerated oil quantity compensation is carried out according to the final feed-forward regenerated oil quantity. The scene with high DOC efficiency can be recognized, and the DPF temperature increasing effect of driving regeneration is better; feedforward oil quantity calculation under the running regeneration steady-state working condition is not affected, the problem of DPF overtemperature when engine running regeneration is stabilized under a certain working condition is avoided, and feedforward excellent compensation is achieved when the DOC temperature is gradually reduced under the reverse towing working condition; and when the carbon loading capacity is relatively low, the feedforward regenerated oil quantity is limited, so that the reliability problem is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle regeneration technology, and in particular to a vehicle regeneration control method, system, electronic equipment and storage medium. Background Art

[0002] During the regeneration process of a diesel engine, there are conditions where the load rate is low and the operating conditions change dramatically (for example, no load on a national highway). At this time, it is difficult to maintain the DPF temperature near the set value, and the regeneration efficiency is poor. During the regeneration process, when the DPF temperature is high, the load is reduced. At this time, the airspeed 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 regeneration oil volume decreases rapidly with the exhaust gas flow, affecting the DPF temperature increase. Summary of the invention

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

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

[0005] As an optional implementation, determining whether to correct the initial feed-forward regeneration oil amount to obtain the final feed-forward regeneration oil amount based on the vehicle operating condition includes: determining whether the vehicle operating condition meets a preset condition; if the vehicle operating condition does not meet the preset condition, not correcting the initial feed-forward regeneration oil amount, and setting the initial feed-forward regeneration oil amount to the final feed-forward regeneration oil amount.

[0006] As an optional implementation, the determining whether to correct the initial feedforward regeneration oil amount to obtain the final feedforward regeneration oil amount based on the vehicle operating condition also includes: determining whether the vehicle operating condition meets a preset condition; if the vehicle operating condition meets 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 operating conditions include: DOC airspeed, actual DPF temperature value and carbon load; the preset conditions include: the DOC airspeed is less than the preset airspeed value, the difference between the DPF temperature setting value and the actual DPF temperature value is greater than the preset difference, the carbon load is less than the preset carbon load and whether the actual DOC temperature value is greater than the preset DOC temperature value.

[0008] As an optional implementation, if the vehicle operating condition reaches the preset condition, correcting the initial feedforward regeneration oil amount includes: correcting the initial feedforward regeneration oil amount according to a feedforward revision coefficient.

[0009] As an optional implementation, the feedforward revision coefficient includes a first feedforward revision coefficient, a second feedforward revision coefficient and a third feedforward revision coefficient.

[0010] As an optional implementation, the first feedforward revision coefficient is determined based on the carbon load and the difference between the DPF temperature setting value and the actual DPF temperature value; the second feedforward revision coefficient is determined based on the circulating fuel supply gradient and the actual DPF temperature value; and the third feedforward revision coefficient is determined based on the circulating fuel supply and the actual DOC temperature value.

[0011] According to another aspect of an embodiment of the present application, a driving regeneration control system is provided, including: an operating condition acquisition module for acquiring a vehicle operating condition; a correction module for determining whether to correct an initial feedforward regeneration oil amount according to the vehicle operating condition to obtain a final feedforward regeneration oil amount; and a compensation module for performing feedforward regeneration oil amount compensation according to the final feedforward regeneration oil amount.

[0012] According to another aspect of an embodiment 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 communicate with each other via the communication bus, and the memory is used to store a computer program; and the processor is used to execute the steps of the vehicle regeneration control method by running the computer program stored in the memory.

[0013] According to another aspect of an embodiment of the present application, a computer-readable storage medium is provided, characterized in that a computer program is stored in the storage medium, wherein the computer program is configured to execute the steps of the vehicle regeneration control method when running.

[0014] In an embodiment of the present application, a driving regeneration control method is provided, and the driving regeneration control method is characterized in that it includes: obtaining the vehicle operating condition; judging whether to correct the initial feedforward regeneration oil amount according to the vehicle operating condition to obtain the final feedforward regeneration oil amount; and performing feedforward regeneration oil amount compensation according to the final feedforward regeneration oil amount. It can identify the scene with higher DOC efficiency, and has a better DPF temperature raising effect for driving regeneration; it does not affect the calculation of the feedforward oil amount under the steady-state condition of driving regeneration, and there will be no DPF over-temperature problem when the engine driving regeneration is stable in a certain condition, wherein the DOC temperature under the reverse towing condition gradually decreases with excellent feedforward compensation; when the carbon load is low, the feedforward regeneration oil amount is limited, which reduces reliability problems. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a flow chart of an optional driving regeneration control method provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application 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 interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] During the regeneration process of a diesel engine, there are conditions where the load rate is low and the operating conditions change dramatically (for example, no load on a national highway). At this time, it is difficult to maintain the DPF temperature near the set value, and the regeneration efficiency is poor. During the regeneration process, when the DPF temperature is high, the load is reduced. At this time, the airspeed 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 regeneration oil volume decreases rapidly with the exhaust gas flow, affecting the DPF temperature increase.

[0021] like Figure 1To solve the above technical problems, the present application provides a driving regeneration control method, including:

[0022] S1 obtains vehicle operating conditions;

[0023] S2 determines whether to correct the initial feedforward regeneration oil amount according to the vehicle operating condition to obtain the final feedforward regeneration oil amount;

[0024] S3 performs feedforward regeneration oil amount compensation according to the final feedforward regeneration oil amount.

[0025] It can identify scenarios with higher DOC efficiency and has better effect on raising the temperature of the DPF for driving regeneration. It does not affect the calculation of the feedforward oil volume under steady-state driving regeneration conditions, and there will be no DPF over-temperature problem when the engine driving regeneration is stable under a certain condition. The DOC temperature gradually decreases under reverse towing conditions, resulting in excellent feedforward compensation. When the carbon load is low, the feedforward regeneration oil volume is limited, reducing reliability issues.

[0026] As an optional implementation, determining whether to correct the initial feed-forward regeneration oil amount to obtain the final feed-forward regeneration oil amount based on the vehicle operating condition includes: determining whether the vehicle operating condition meets a preset condition; if the vehicle operating condition does not meet the preset condition, not correcting the initial feed-forward regeneration oil amount, and setting the initial feed-forward regeneration oil amount to the final feed-forward regeneration oil amount.

[0027] When the following conditions are met, the DOC efficiency is considered to be high, and the regeneration oil compensation conditions are met: DOC airspeed is less than a certain value (when the DOC is at a suitable temperature, the lower the DOC airspeed, the higher the DOC efficiency), DOC temperature is greater than a certain value (within a certain range of DOC temperature, the higher the temperature, the higher the DOC efficiency), DPF temperature setting value - DPF temperature actual value is greater than a certain threshold (when the actual DPF temperature is lower than the DPF temperature setting value, it is considered that regeneration oil compensation is required at this time), carbon load is lower than a certain value (at the beginning of regeneration, there is a lot of carbon deposits in the DPF. At this time, if regeneration oil compensation is performed, there may be a risk of DPF burnout. Therefore, when the carbon load is lower than a certain value, regeneration oil compensation is performed, mainly considering reliability issues). When the above conditions are not met, the initial feedforward regeneration oil amount is not corrected, and the initial feedforward regeneration oil amount is directly assigned to the feedforward regeneration oil amount; if the above conditions are met, the initial feedforward regeneration oil amount is corrected and output to the feedforward regeneration oil amount.

[0028] As an optional implementation, the determining whether to correct the initial feedforward regeneration oil amount to obtain the final feedforward regeneration oil amount based on the vehicle operating condition also includes: determining whether the vehicle operating condition meets a preset condition; if the vehicle operating condition meets 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.

[0029] As an optional implementation, the vehicle operating conditions include: DOC airspeed, actual DPF temperature value and carbon load; the preset conditions include: the DOC airspeed is less than the preset airspeed value, the difference between the DPF temperature setting value and the actual DPF temperature value is greater than the preset difference, the carbon load is less than the preset carbon load and whether the actual DOC temperature value is greater than the preset DOC temperature value.

[0030] As an optional implementation, if the vehicle operating condition reaches the preset condition, correcting the initial feedforward regeneration oil amount includes: correcting the initial feedforward regeneration oil amount according to a feedforward revision coefficient.

[0031] As an optional implementation, the feedforward revision coefficient includes a first feedforward revision coefficient, a second feedforward revision coefficient and a third feedforward revision coefficient.

[0032] As an optional implementation, the first feedforward revision coefficient is determined based on the carbon load and the difference between the DPF temperature setting value and the actual DPF temperature value; the second feedforward revision coefficient is determined based on the circulating fuel supply gradient and the actual DPF temperature value; and the third feedforward revision coefficient is determined based on the circulating fuel supply and the actual DOC temperature value.

[0033] There are three feedforward correction coefficients. The feedforward correction coefficient 1_MAP is a calibrated MAP based on the carbon load, the difference between the DPF temperature setting value and the actual DPF temperature value. During calibration, the smaller the carbon load and the greater the difference between the DPF temperature setting value and the actual DPF temperature value, the greater the coefficient calibration.

[0034] The feedforward correction coefficient 2_MAP is a calibrated MAP based on the circulating fuel supply gradient and DOC temperature. When the circulating fuel supply decreases, the main injection amount decreases, the oxygen concentration in the exhaust gas increases, and the exhaust flow rate decreases, the DOC airspeed 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, the smaller the circulating fuel supply gradient (less than 0) and the higher the DOC temperature, the larger the feedforward correction coefficient 2_MAP can be calibrated.

[0035] The feedforward correction coefficient 3_MAP is a calibrated MAP based on the circulating fuel supply and DOC temperature. When the circulating fuel supply of the engine is low (for example, in reverse towing conditions), the exhaust flow and DOC airspeed are low. If the DOC temperature is higher than a certain value, the DOC conversion efficiency is also high, and regeneration oil compensation can be performed at this time. Therefore, when the circulating fuel supply is less than a certain value, the higher the DOC temperature, the larger the feedforward correction coefficient 3_MAP can be calibrated.

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

[0037] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) 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 emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0039] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0040] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.

[0041] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0042] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0043] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A driving regeneration control method, characterized in that: include: Obtain vehicle operating conditions; Determine whether to correct the initial feedforward regeneration oil amount according to the vehicle operating condition to obtain a final feedforward regeneration oil amount; Feedforward regeneration oil amount compensation is performed according to the final feedforward regeneration oil amount.

2. The driving regeneration control method according to claim 1, characterized in that: The determining whether to correct the initial feedforward regeneration oil amount to obtain the final feedforward regeneration oil amount according to the vehicle operating condition comprises: Determining whether the vehicle operating condition meets a preset condition; If the vehicle operating condition does not meet the preset condition, the initial feed-forward regeneration oil amount is not corrected, and the initial feed-forward regeneration oil amount is set to the final feed-forward regeneration oil amount.

3. The driving regeneration control method according to claim 1, characterized in that: The determining whether to correct the initial feedforward regeneration oil amount to obtain the final feedforward regeneration oil amount according to the vehicle operating condition also includes: Determining whether the vehicle operating condition meets a preset condition; If the vehicle operating condition reaches the preset condition, the initial feed-forward regeneration oil amount is corrected, and the corrected feed-forward regeneration oil amount is set as the final feed-forward regeneration oil amount.

4. The driving regeneration control method according to any one of claims 3, characterized in that: The vehicle operating conditions include: DOC airspeed, DOC temperature actual value, DPF temperature actual value and carbon load; the preset conditions include: The DOC airspeed is less than a preset airspeed value, the difference between the DPF temperature setting value and the DPF temperature actual value is greater than a preset difference, the carbon load is less than a preset carbon load, and whether the DOC temperature actual value is greater than a preset DOC temperature value.

5. The driving regeneration control method according to claim 4, characterized in that: If the vehicle operating condition reaches the preset condition, the initial feedforward regeneration oil amount is corrected, including: The initial feedforward regeneration oil amount is corrected according to the feedforward revision coefficient.

6. The driving regeneration control method according to claim 5, characterized in that: The feedforward revision coefficients include a first feedforward revision coefficient, a second feedforward revision coefficient, and a third feedforward revision coefficient.

7. The driving regeneration control method according to claim 6, characterized in that: determining the first feedforward revision coefficient based on the carbon load and a difference between the DPF temperature setting value and the DPF temperature actual value; determining the second feedforward revision coefficient based on a circulating fuel supply gradient and the actual value of the DPF temperature; The third feed-forward revision coefficient is determined based on the circulating fuel supply and the actual value of the DOC temperature.

8. A driving regeneration control system, characterized in that: include: A working condition acquisition module, used to acquire vehicle working conditions; A correction module, used for determining whether to correct the initial feedforward regeneration oil amount according to the vehicle operating condition to obtain a final feedforward regeneration oil amount; A compensation module is used to perform feedforward regeneration oil quantity compensation according to the final feedforward regeneration oil quantity.

9. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface and the memory communicate with each other via the communication bus, wherein: The memory is used to store computer programs; The processor is used to execute the steps of the vehicle regeneration control method according to any one of claims 1 to 7 by running the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the vehicle regeneration control method according to any one of claims 1 to 7 when running.

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