DPF regeneration control method and device, electronic equipment and readable storage medium

Abstract

The invention provides a DPF regeneration control method and device, electronic equipment and a readable storage medium. The method comprises the steps that it is determined that engine state parameters and post-processing state parameters are both in a set range; obtaining a regeneration time interval threshold value under the current extreme condition based on a pre-stored correction coefficient table or correction offset time table; according to the regeneration time interval threshold value, the engine is controlled to execute DPF regeneration operation; wherein the correction coefficient table comprises regeneration time correction coefficients under different extreme conditions, the correction offset time table comprises regeneration time correction offsets under different extreme conditions, and the extreme conditions comprise one or a combination of more of extreme temperature, extreme atmospheric pressure and a specific vehicle type. According to the method, by considering the influence of extreme conditions such as the extreme temperature, the extreme atmospheric pressure and the specific vehicle type on the regeneration time interval threshold value, the appropriate regeneration time interval threshold value is set for different extreme conditions, and the DPF blockage fault caused by the regeneration time interval is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of engine after-treatment systems, and in particular to a DPF regeneration control method, device, electronic equipment and a readable storage medium. Background Art

[0002] Diesel Particulate Filter (DPF) is a common emission control device on cars. It can capture tiny particles in engine exhaust, thereby reducing the emission of automobile pollutants. When the engine of a diesel car is running, the exhaust gas produced by combustion will pass through the filter in the DPF. Tiny particles will be captured in the filter, while larger gas molecules will be discharged through the filter. When particulate matter accumulates to a certain extent in the DPF, it will cause poor exhaust, affect the power and fuel consumption of the engine, and need to be cleaned up in time. Cleaning out the accumulated carbon in the DPF is called DPF regeneration.

[0003] At present, the DPF regeneration control method provided by the prior art triggers regeneration by the engine running time. Specifically, the regeneration time interval is fixed in advance, and the regeneration operation is triggered when the engine running time is greater than the fixed regeneration time interval. However, this method does not consider the impact of extreme situations and special vehicle models on the regeneration time interval.

[0004] Therefore, how to solve the problem that the existing DPF regeneration control method fails to consider the impact of extreme situations and special vehicle models on the regeneration time interval, and is unable to calibrate the appropriate regeneration time interval threshold, which in turn leads to DPF clogging in extreme situations, is an important issue that needs to be urgently solved in the field of engine after-treatment systems. Summary of the invention

[0005] The present invention provides a DPF regeneration control method, device, electronic device and readable storage medium, which are used to overcome the defect that the existing DPF regeneration control method fails to consider the influence of extreme situations on the regeneration time interval and cannot calibrate a suitable regeneration time interval threshold, resulting in easy DPF blockage in extreme situations. Suitable regeneration time interval thresholds are set in different extreme situations to reduce DPF blockage failures caused by the regeneration time interval.

[0006] On the one hand, the present invention provides a DPF regeneration control method, comprising: determining that both an engine state parameter and a post-processing state parameter are within a set range; obtaining a regeneration time interval threshold under a current extreme condition based on a pre-stored correction coefficient table or a correction offset time table; and controlling the engine to perform a DPF regeneration operation according to the regeneration time interval threshold; wherein the correction coefficient table includes a regeneration time correction coefficient under different extreme conditions, and the correction offset time table includes a regeneration time correction offset under different extreme conditions, and the extreme conditions include one or more combinations of extreme temperatures, extreme atmospheric pressures, and specific vehicle models.

[0007] Furthermore, the correction coefficient table includes plateau regeneration time correction coefficients under different atmospheric pressures; accordingly, obtaining the correction coefficient table specifically includes: when the engine state parameters and the post-processing state parameters are both within the set range, performing a DPF carbon accumulation test under different atmospheric pressures to obtain an actual plateau regeneration time interval; calculating the plateau regeneration time correction coefficient based on a preset plain regeneration time interval threshold and the actual plateau regeneration time interval under different atmospheric pressures to obtain the correction coefficient table; wherein, the correction coefficient table includes different atmospheric pressures and their corresponding plateau regeneration time correction coefficients.

[0008] Furthermore, the regeneration time interval threshold under the current extreme situation is obtained based on a pre-stored correction coefficient table or a correction offset time table, including: obtaining the current atmospheric pressure value, and determining that the current atmospheric pressure value is lower than the standard atmospheric pressure; matching the corresponding target plateau regeneration time correction coefficient from the correction coefficient table according to the current atmospheric pressure value; and obtaining the regeneration time interval threshold according to the target plateau regeneration time correction coefficient and the preset plain regeneration time interval threshold.

[0009] Furthermore, the corrected offset schedule includes plateau regeneration time offsets under different atmospheric pressures; accordingly, obtaining the corrected offset schedule specifically includes: when the engine state parameters and the post-processing state parameters are within the set range, performing a DPF carbon accumulation test under different atmospheric pressures to obtain an actual plateau regeneration time interval; calculating the plateau regeneration time offset based on a preset plain regeneration time interval threshold and the actual plateau regeneration time interval under different atmospheric pressures to obtain the corrected offset schedule; wherein, the corrected offset schedule includes different atmospheric pressures and their corresponding plateau regeneration time offsets.

[0010] Furthermore, the regeneration time interval threshold under the current extreme situation is obtained based on a pre-stored correction coefficient table or correction offset time table, including: obtaining the current atmospheric pressure value, and determining that the current atmospheric pressure value is lower than the standard atmospheric pressure; matching the corresponding target plateau regeneration time offset from the pre-stored correction offset time table according to the current atmospheric pressure value; obtaining the time interval from the last successful regeneration; correcting the time interval from the last successful regeneration according to the target plateau regeneration time offset to obtain the regeneration time interval threshold; wherein the target plateau regeneration time offset is greater than the preset plain regeneration time interval threshold, and the regeneration time interval threshold is the time interval from the plateau to the last successful regeneration.

[0011] Furthermore, the engine state parameters include water temperature, oil temperature and fuel level, and the post-processing state parameters include exhaust flow, DPF pressure difference and exhaust temperature.

[0012] In a second aspect, the present invention also provides a DPF regeneration control device, comprising: a parameter judgment module, used to determine that the engine state parameters and the post-processing state parameters are both within a set range; a regeneration time interval threshold acquisition module, used to obtain the regeneration time interval threshold under the current extreme situation based on a pre-stored correction coefficient table or correction offset time table; a DPF regeneration control module, used to control the engine to perform a DPF regeneration operation according to the regeneration time interval threshold; wherein the correction coefficient table includes the regeneration time correction coefficient under different extreme situations, the correction offset time table includes the regeneration time correction offset under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and a specific vehicle model.

[0013] In a third aspect, the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a DPF regeneration control method as described in any one of the above is implemented.

[0014] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements any of the DPF regeneration control methods described above.

[0015] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the DPF regeneration control method as described in any one of the above is implemented.

[0016] The DPF regeneration control method provided by the present invention determines that both the engine state parameter and the post-processing state parameter are within the set range, and obtains the regeneration time interval threshold value under the current extreme situation based on the pre-stored correction coefficient table or correction offset time table, and then controls the engine to perform the DPF regeneration operation according to the regeneration time interval threshold value; wherein the correction coefficient table includes the regeneration time correction coefficient under different extreme situations, and the correction offset time table includes the regeneration time correction offset under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and specific vehicle model. The method sets appropriate regeneration time interval threshold values ​​for different extreme situations by considering the influence of extreme situations such as extreme temperature, extreme atmospheric pressure and specific vehicle model on the regeneration time interval threshold value, thereby reducing the DPF blockage failure caused by the regeneration time interval. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 It is a flow chart of a DPF regeneration control method provided by an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall flow of the DPF regeneration control method provided by an embodiment of the present invention.

[0020] Figure 3 It is a structural schematic diagram of a DPF regeneration control device provided in an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of 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.

[0023] It should be noted that the existing DPF regeneration control method mainly triggers regeneration by engine running time. Specifically, the regeneration time interval is fixed in advance, and the regeneration operation is triggered when the engine running time is greater than the fixed regeneration time interval. However, this method does not consider the impact of extreme situations and special vehicle models on the regeneration time interval, which can easily lead to DPF blockage.

[0024] In view of this, the present invention proposes a new DPF regeneration control method, specifically, Figure 1 A schematic flow chart of a DPF regeneration control method provided in an embodiment of the present invention is shown.

[0025] like Figure 1 As shown, the method includes steps S110-S130, and steps S110-S130 and related steps will be described in detail below.

[0026] S110, determining that both the engine state parameter and the post-processing state parameter are within a set range.

[0027] It is easy to understand that for the Diesel Particulate Filter (DPF), regular regeneration is very necessary to remove the carbon particles accumulated in the filter. In order to effectively plan the regeneration cycle, it is necessary to ensure that the engine and other related systems are in good condition so that the regeneration operation can be carried out under appropriate conditions and avoid causing additional stress to the engine.

[0028] It is determined that both the engine state parameter and the post-processing state parameter are within a set range, specifically, it is determined that the engine state parameter is within a set range, and it is determined that the post-processing state parameter is within a set range.

[0029] The engine status parameters include, but are not limited to, water temperature, oil temperature, and fuel level, and the post-processing status parameters include, but are not limited to, exhaust temperature, DPF pressure difference, and exhaust temperature. Both the engine status parameters and post-processing status parameters can be obtained through various sensors installed on the vehicle.

[0030] The setting range refers to the normal range corresponding to the engine state parameter and the post-processing state parameter respectively, and can be set according to the actual situation of the engine, and is not specifically limited here.

[0031] For example, in a specific embodiment, determining that the engine status parameters are within a set range includes: the engine water temperature is between 70°C and 100°C, the engine oil temperature is between 100°C and 150°C, and the fuel level is maintained between 1 / 4 and 3 / 4 of the tank capacity.

[0032] In another specific embodiment, determining that the post-processing state parameter is within a set range includes: the DPF pressure difference is between 0.5 kPa and 5 kPa, and the exhaust temperature is between 200° C. and 600° C.

[0033] When any one of the engine status parameter and the post-processing status parameter is not within / outside the set range, it means that it is not suitable to perform the regeneration operation at this time, and the subsequent steps will not be continued.

[0034] S120, based on a pre-stored correction coefficient table or correction offset time table, obtain the regeneration time interval threshold under the current extreme situation; wherein the correction coefficient table includes the regeneration time correction coefficient under different extreme situations, the correction offset time table includes the regeneration time correction offset under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and a specific vehicle model.

[0035] It can be understood that, based on the determination in step S110 that both the engine state parameters and the post-processing state parameters are within the set range, further, step S120 will obtain the regeneration time interval threshold value under the current extreme situation based on the correction coefficient table that has been acquired and stored in advance, or, will obtain the regeneration time interval threshold value under the current extreme situation based on the correction offset time table that has been acquired and stored in advance, in preparation for the subsequent execution of the DPF regeneration operation.

[0036] Specifically, the present embodiment can obtain the regeneration time interval threshold under the current extreme situation through two solutions, one is a correction coefficient table, and the other is a correction offset time table. It should be noted that only one of the correction coefficient table and the correction offset time table can be selected, and both cannot be applied at the same time.

[0037] In the correction coefficient table, the regeneration time correction coefficients under different extreme conditions are stored, that is, each extreme condition has its corresponding regeneration time correction coefficient. Therefore, on the premise of knowing what type of the current extreme condition is, the corresponding regeneration time correction coefficient can be matched from the pre-stored correction coefficient table, and the regeneration time correction coefficient can be used as the target regeneration time correction coefficient. Then, the preset plain regeneration time interval threshold is corrected using the target regeneration time correction coefficient to obtain the regeneration time interval threshold under the current extreme condition. Therefore, DPF regeneration control can be performed according to the regeneration time interval threshold.

[0038] In the correction offset time table, the regeneration time correction offsets under different extreme situations are stored, that is, each calculation situation has its corresponding regeneration time correction offset. Therefore, on the premise of knowing what type of extreme situation the current situation is, the corresponding regeneration time correction offset can be matched from the pre-stored correction offset time table, and the regeneration time correction offset can be used as the target regeneration time correction offset. Then, the time interval from the last successful regeneration is corrected using the target regeneration time correction offset, and the time interval from the last successful regeneration under extreme situations (that is, the regeneration time interval threshold described in this step) can be obtained. Therefore, DPF regeneration control can be performed according to the time interval from the last successful regeneration under extreme situations.

[0039] Whether in the correction coefficient table or the correction offset time table, the extreme conditions mentioned include but are not limited to extreme temperatures, extreme atmospheric pressures and specific vehicle models. Specifically, the extreme conditions may include only any one of extreme temperatures, extreme atmospheric pressures and specific vehicle models, or it may be a combination of multiple extreme temperatures, extreme atmospheric pressures and specific vehicle models, which is not specifically limited here.

[0040] It is easy to understand that extreme temperature, extreme atmospheric pressure and specific models have a relatively large impact on the regeneration time interval. In particular, the rate at which soot enters the DPF is different at different altitudes (atmospheric pressures), and the carbon accumulation rate is also different. Compared with plains (low altitude areas), plateaus (high altitude areas / extreme atmospheric pressure areas) have a faster carbon accumulation rate, and the same regeneration time interval is more likely to cause DPF blockage.

[0041] The extreme temperature is lower than the set temperature, which can be 0 degrees Celsius. The extreme atmospheric pressure is lower than the set pressure value, which can be the standard atmospheric pressure. The specific vehicle model mainly refers to the type of engine, including but not limited to the D09S4 engine and the D09C6 engine, which can be set according to actual conditions.

[0042] The current extreme situation is a combination of one or more of the above extreme situations, which will not be elaborated here.

[0043] S130: Controlling the engine to perform a DPF regeneration operation according to the regeneration time interval threshold.

[0044] It can be understood that, based on the regeneration time interval threshold under the current extreme situation obtained in step S120 based on the pre-stored correction coefficient table or correction offset time table, further, step S130 will directly control the engine to perform DPF regeneration operation according to the regeneration time interval threshold to remove the carbon particles accumulated in the filter.

[0045] Specifically, the actual engine operating time is compared with the regeneration time interval threshold, and when the actual engine operating time reaches the regeneration time interval threshold, the DPF regeneration operation is triggered. When performing the DPF regeneration operation, the engine control unit adjusts the engine operating parameters, such as increasing the injection amount to increase the exhaust temperature, thereby promoting the combustion of particulate matter in the DPF.

[0046] During the DPF regeneration operation, the engine status parameters and the after-treatment status parameters continue to be monitored to ensure that the regeneration process is completed smoothly.

[0047] In this embodiment, by determining that both the engine state parameter and the post-processing state parameter are within the set range, and based on the pre-stored correction coefficient table or correction offset time table, the regeneration time interval threshold value under the current extreme situation is obtained, and then according to the regeneration time interval threshold value, the engine is controlled to perform the DPF regeneration operation; wherein, the correction coefficient table includes the regeneration time correction coefficient under different extreme situations, and the correction offset time table includes the regeneration time correction offset under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and specific vehicle models. The method sets appropriate regeneration time interval threshold values ​​for different extreme situations by considering the influence of extreme situations such as extreme temperature, extreme atmospheric pressure and specific vehicle models on the regeneration time interval threshold value, thereby reducing the DPF blockage failure caused by the regeneration time interval.

[0048] On the basis of the above embodiment, further, the following will describe in detail the process of obtaining the correction coefficient table and obtaining the regeneration time interval threshold under the current extreme situation based on the correction coefficient table, mainly for the case where the extreme situation is atmospheric pressure.

[0049] The correction coefficient table includes plateau regeneration time correction coefficients under different atmospheric pressures; accordingly, obtaining the correction coefficient table specifically includes: when the engine state parameters and the post-processing state parameters are within the set range, performing a DPF carbon accumulation test under different atmospheric pressures to obtain the actual plateau regeneration time interval; calculating the plateau regeneration time correction coefficient according to the preset plain regeneration time interval threshold and the actual plateau regeneration time interval under different atmospheric pressures to obtain the correction coefficient table; wherein the correction coefficient table includes different atmospheric pressures and their corresponding plateau regeneration time correction coefficients.

[0050] It is understandable that when obtaining the correction coefficient table, it is first necessary to determine whether the engine state parameters and the post-processing state parameters are within the normal setting range. When and only when the engine state parameters and the post-processing state parameters are within the normal setting range, the DPF carbon accumulation test is carried out at different altitudes to obtain the actual plateau regeneration time interval corresponding to different altitudes.

[0051] Among them, the carbon accumulation test is a method for testing the amount of accumulated carbon particles in the DPF. Specifically, the engine is operated at different altitudes, the engine running time is recorded, the changes in the DPF pressure difference are monitored, and the carbon accumulation rate is recorded. If the DPF pressure difference reaches a predetermined regeneration threshold (for example, 10kPa to 30kPa), the engine running time at this time is recorded, thereby obtaining the actual plateau regeneration time interval corresponding to different altitudes.

[0052] Then, according to the ratio of the actual plateau regeneration time interval corresponding to different altitudes to the preset plain regeneration time interval threshold, the plateau regeneration time correction coefficient corresponding to different altitudes can be obtained, that is, the plateau regeneration time correction coefficient under different atmospheric pressures. Thus, a correction coefficient table is obtained and stored for easy call.

[0053] In the correction factor table, there is a one-to-one correspondence between atmospheric pressure and plateau regeneration time correction factor.

[0054] In actual application, when it is determined that the engine state parameters and the post-processing state parameters are all within the set range, the regeneration time interval threshold under the current extreme situation is obtained based on the pre-stored correction coefficient table, specifically including: obtaining the current atmospheric pressure value, and determining that the current atmospheric pressure value is lower than the standard atmospheric pressure; according to the current atmospheric pressure value, matching the corresponding target plateau regeneration time correction coefficient from the correction coefficient table; according to the target plateau regeneration time correction coefficient and the preset plain regeneration time interval threshold, obtaining the regeneration time interval threshold.

[0055] Specifically, first, the current atmospheric pressure value is obtained through the atmospheric pressure sensor installed on the vehicle, and then the current atmospheric pressure value is compared with the standard atmospheric pressure. The plateau correction switch will only be turned on when the current atmospheric pressure value is lower than the standard atmospheric pressure (indicating that this is an extreme atmospheric pressure situation), otherwise, DPF regeneration control is performed under normal circumstances.

[0056] After turning on the plateau correction switch, the plateau regeneration time correction is automatically performed. Specifically, according to the current atmospheric pressure value, the plateau regeneration time correction coefficient corresponding to the current atmospheric pressure value is matched from the correction coefficient table, and the matched plateau regeneration time correction coefficient is used as the target plateau regeneration time correction coefficient.

[0057] Next, the preset plain regeneration time interval threshold is corrected according to the target plateau regeneration time correction coefficient, that is, the target plateau regeneration time correction coefficient is multiplied by the preset plain regeneration time interval threshold to obtain the regeneration time interval threshold under the current extreme situation (current atmospheric pressure value).

[0058] The preset plain regeneration time interval threshold is obtained through the carbon accumulation test and is closely related to the engine type. For example, the preset plain regeneration time interval threshold corresponding to the D09S4 engine loader is 60 hours, and the preset plain regeneration time interval threshold corresponding to the D09C6 engine crane is 200 hours.

[0059] For example, in a specific embodiment, the preset plain regeneration time interval threshold is 100 hours, and the target plateau regeneration time correction coefficient is 0.8. At this time, the regeneration time interval threshold is the product of the preset plain regeneration time interval threshold and the target plateau regeneration time correction coefficient, which is 80 hours.

[0060] Finally, according to the regeneration time interval threshold value under the current atmospheric pressure value, the engine is controlled to perform the DPF regeneration operation. Specifically, the actual engine operation time is compared with the regeneration time interval threshold value, and the DPF regeneration operation is triggered when the actual engine operation time reaches the regeneration time interval threshold value. When performing the DPF regeneration operation, the engine control unit will adjust the engine's operating parameters, such as increasing the injection amount to increase the exhaust temperature, thereby promoting the combustion of particulate matter in the DPF.

[0061] During the DPF regeneration operation, the engine status parameters and the after-treatment status parameters continue to be monitored to ensure that the regeneration process is completed smoothly.

[0062] It is worth mentioning that the correction coefficient table described above only considers the situation of extreme atmospheric pressure. According to the same logic, specific vehicle models and extreme temperatures can also be taken into account. Therefore, the correction coefficient table includes regeneration time correction coefficients under different atmospheric pressures, different temperatures and different specific vehicle models.

[0063] In this case, in actual application, the corresponding target plateau regeneration time correction coefficient is matched from the correction coefficient table according to any extreme case or multiple extreme cases, and the regeneration time interval threshold is calculated based on the target plateau regeneration time correction coefficient and the preset plain regeneration time interval threshold, and then the DPF regeneration control is performed according to the regeneration time interval threshold.

[0064] In this embodiment, the DPF carbon accumulation test is performed under different atmospheric pressures when the engine state parameters and the post-processing state parameters are within the set range, and the actual plateau regeneration time interval is obtained. The plateau regeneration time correction coefficient is calculated according to the preset plain regeneration time interval threshold and the plateau actual regeneration time interval under different atmospheric pressures to obtain a correction coefficient table, and then the regeneration time interval threshold under the current atmospheric pressure value is obtained based on the pre-stored correction coefficient table, so that the engine is controlled to perform the DPF regeneration operation according to the regeneration time interval threshold. This method sets appropriate regeneration time interval thresholds for different atmospheric pressure conditions by considering the influence of extreme atmospheric pressure on the regeneration time interval threshold, thereby reducing DPF blockage failures caused by the regeneration time interval.

[0065] On the basis of the above embodiment, further, the following will further describe in detail the process of obtaining the corrected offset schedule and obtaining the regeneration time interval threshold under the current extreme situation based on the schedule, mainly for the case where the extreme situation is atmospheric pressure.

[0066] The corrected offset schedule includes the plateau regeneration time offset under different atmospheric pressures; accordingly, obtaining the corrected offset schedule specifically includes: when the engine state parameters and the post-processing state parameters are within the set range, performing a DPF carbon accumulation test under different atmospheric pressures to obtain the actual plateau regeneration time interval; calculating the plateau regeneration time offset according to the preset plain regeneration time interval threshold and the actual plateau regeneration time interval under different atmospheric pressures to obtain the corrected offset schedule; wherein, the corrected offset schedule includes different atmospheric pressures and their corresponding plateau regeneration time offsets.

[0067] It is understandable that when obtaining the corrected offset schedule, it is first necessary to determine whether the engine state parameters and the post-processing state parameters are within the normal setting range. When and only when the engine state parameters and the post-processing state parameters are within the normal setting range, the DPF carbon accumulation test is carried out at different altitudes to obtain the actual plateau regeneration time interval corresponding to different altitudes.

[0068] Then, according to the difference between the actual plateau regeneration time interval corresponding to different altitudes and the preset plain regeneration time interval threshold, the plateau regeneration time offset corresponding to different altitudes can be obtained, that is, the plateau regeneration time offset under different atmospheric pressures. Thus, the corrected offset time table can be obtained and stored for future use.

[0069] In the corrected offset time table, there is a one-to-one correspondence between atmospheric pressure and plateau regeneration time offset.

[0070] In actual application, when it is determined that the engine state parameters and the post-processing state parameters are both within the set range, the regeneration time interval threshold under the current extreme situation is obtained based on the pre-stored correction offset schedule, specifically including: obtaining the current atmospheric pressure value, and determining that the current atmospheric pressure value is lower than the standard atmospheric pressure; according to the current atmospheric pressure value, matching the corresponding target plateau regeneration time offset from the pre-stored correction offset schedule; obtaining the time interval from the last successful regeneration; according to the target plateau regeneration time offset, correcting the time interval from the last successful regeneration to obtain the regeneration time interval threshold; wherein, the target plateau regeneration time offset is greater than the preset plain regeneration time interval threshold, and the regeneration time interval threshold is the time interval from the plateau to the last successful regeneration.

[0071] Specifically, first, the current atmospheric pressure value is obtained through the atmospheric pressure sensor installed on the vehicle, and then the current atmospheric pressure value is compared with the standard atmospheric pressure. The plateau correction switch will only be turned on when the current atmospheric pressure value is lower than the standard atmospheric pressure (indicating that this is an extreme atmospheric pressure situation), otherwise, DPF regeneration control is performed under normal circumstances.

[0072] After turning on the plateau correction switch, the plateau regeneration time correction is automatically performed. Specifically, according to the current atmospheric pressure value, the plateau regeneration time offset corresponding to the current atmospheric pressure value is matched from the correction offset time table, and the matched plateau regeneration time offset is used as the target plateau regeneration time offset.

[0073] Next, the time interval from the last successful regeneration is corrected according to the target plateau regeneration time offset. Specifically, the target plateau regeneration time offset is added to the time interval from the last successful regeneration to obtain the regeneration time interval threshold under the current atmospheric pressure value.

[0074] The regeneration time interval threshold value obtained in this embodiment is the corrected time interval from the last successful regeneration, that is, the time interval from the plateau to the last successful regeneration.

[0075] In a specific embodiment, the target plateau regeneration time offset is 1 second, and the time interval from the last successful regeneration is 1 second. Therefore, the corrected time interval from the plateau to the last successful regeneration is 2 seconds.

[0076] It should be noted that, in order to avoid too frequent regeneration, for safety purposes, the target plateau regeneration time offset in this embodiment is greater than the preset plain regeneration time interval threshold. In other words, the minimum plateau regeneration time offset among the multiple plateau regeneration time offsets in the modified offset schedule is greater than the preset plain regeneration time interval threshold.

[0077] Finally, according to the regeneration time interval threshold value under the current atmospheric pressure value, the engine is controlled to perform the DPF regeneration operation. Specifically, the actual engine operation time is compared with the regeneration time interval threshold value, and the DPF regeneration operation is triggered when the actual engine operation time reaches the regeneration time interval threshold value. When performing the DPF regeneration operation, the engine control unit will adjust the engine's operating parameters, such as increasing the injection amount to increase the exhaust temperature, thereby promoting the combustion of particulate matter in the DPF.

[0078] During the DPF regeneration operation, the engine status parameters and the after-treatment status parameters continue to be monitored to ensure that the regeneration process is completed smoothly.

[0079] It is worth mentioning that the above description is that the correction time offset table only considers the situation of extreme atmospheric pressure. According to the same logical thinking, specific vehicle models and extreme temperatures can also be taken into account. Therefore, the correction time offset table includes the regeneration time correction offset under different atmospheric pressures, different temperatures and different specific vehicle models.

[0080] In this case, in actual application, the corresponding target plateau regeneration time offset is matched from the corrected time offset table according to any extreme case or multiple extreme cases, and the time interval from the last successful regeneration is corrected according to the target plateau regeneration time offset to obtain the regeneration time interval threshold, and then the DPF regeneration control is performed according to the regeneration time interval threshold.

[0081] In this embodiment, the DPF carbon accumulation test is performed under different atmospheric pressures when the engine state parameters and the post-processing state parameters are within the set range to obtain the actual plateau regeneration time interval, and the plateau regeneration time offset is calculated according to the preset plain regeneration time interval threshold and the plateau actual regeneration time interval under different atmospheric pressures to obtain a corrected offset schedule, and then the regeneration time interval threshold under the current atmospheric pressure value is obtained based on the pre-stored corrected offset schedule, so that the engine is controlled to perform the DPF regeneration operation according to the regeneration time interval threshold. This method sets appropriate regeneration time interval thresholds for different atmospheric pressure conditions by considering the influence of extreme atmospheric pressure on the regeneration time interval threshold, thereby reducing DPF blockage failures caused by the regeneration time interval.

[0082] In addition, still taking the extreme case of extreme atmospheric pressure as an example, Figure 2 The overall flow chart of the DPF regeneration control method provided by the embodiment of the present invention is shown.

[0083] like Figure 2 As shown, first, the engine state parameter and the post-processing state parameter are checked to determine whether the engine state parameter and the post-processing state parameter are both within the set range.

[0084] After determining that the engine status parameters and post-processing status parameters are within the set range, determine whether the current atmospheric pressure value is lower than the standard atmospheric pressure. The plateau correction switch will only be activated when the current atmospheric pressure value is lower than the standard atmospheric pressure.

[0085] One branch of the plateau correction switch is to match the corresponding target plateau regeneration time correction coefficient from the correction coefficient table, and obtain the final regeneration time interval threshold value based on the product of the target plateau regeneration time correction coefficient and the preset plain regeneration time interval threshold value, so as to control the engine to perform DPF regeneration operation according to the regeneration time interval threshold value.

[0086] Another branch of the plateau correction switch is to match the corresponding target plateau regeneration time offset from the correction offset time table, and correct the time interval from the last successful regeneration according to the target plateau regeneration time offset to obtain the time interval from the plateau to the last successful regeneration, thereby controlling the engine to perform the DPF regeneration operation according to the time interval from the plateau to the last successful regeneration.

[0087] It should be noted that in actual application, only one of the two branches of the plateau correction switch can be used, and both cannot be used at the same time to avoid confusion in the engine DPF regeneration control.

[0088] Corresponding to the DPF regeneration control method described in the above embodiments, the present invention also provides a DPF regeneration control device. Specifically, Figure 3 A structural schematic diagram of a DPF regeneration control device provided in an embodiment of the present invention is shown.

[0089] like Figure 3 As shown, the device includes: a parameter judgment module 310, used to determine whether the engine state parameter and the post-processing state parameter are both within the set range; a regeneration time interval threshold acquisition module 320, used to obtain the regeneration time interval threshold under the current extreme situation based on a pre-stored correction coefficient table or correction offset time table; a DPF regeneration control module 330, used to control the engine to perform the DPF regeneration operation according to the regeneration time interval threshold; wherein the correction coefficient table includes the regeneration time correction coefficient under different extreme situations, the correction offset time table includes the regeneration time correction offset under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and a specific vehicle model.

[0090] In this embodiment, the parameter judgment module 310 determines that the engine state parameter and the post-processing state parameter are both within the set range, and the regeneration time interval threshold acquisition module 320 obtains the regeneration time interval threshold under the current extreme situation based on the pre-stored correction coefficient table or correction offset time table, and then the DPF regeneration control module 330 controls the engine to perform the DPF regeneration operation according to the regeneration time interval threshold; wherein the correction coefficient table includes the regeneration time correction coefficient under different extreme situations, and the correction offset time table includes the regeneration time correction offset under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and specific vehicle models. The device sets appropriate regeneration time interval thresholds for different extreme situations by considering the influence of extreme situations such as extreme temperature, extreme atmospheric pressure and specific vehicle models on the regeneration time interval threshold, thereby reducing the DPF blockage failure caused by the regeneration time interval.

[0091] It should be noted that the DPF regeneration control device provided in this embodiment and the DPF regeneration control method described in the above embodiments can be referred to each other, and will not be described in detail here.

[0092] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the DPF regeneration control method, which includes: determining that the engine state parameter and the post-processing state parameter are both within the set range; obtaining the regeneration time interval threshold under the current extreme situation based on the pre-stored correction coefficient table or correction offset time table; and controlling the engine to perform the DPF regeneration operation according to the regeneration time interval threshold; wherein the correction coefficient table includes the regeneration time correction coefficient under different extreme situations, and the correction offset time table includes the regeneration time correction offset under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and a specific vehicle model.

[0093] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0094] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the DPF regeneration control method provided by the above methods, which method includes: determining that the engine state parameter and the post-processing state parameter are both within a set range; based on a pre-stored correction coefficient table or correction offset time table, obtaining a regeneration time interval threshold under the current extreme situation; according to the regeneration time interval threshold, controlling the engine to perform a DPF regeneration operation; wherein the correction coefficient table includes regeneration time correction coefficients under different extreme situations, and the correction offset time table includes regeneration time correction offsets under different extreme situations, and the extreme situation includes one or more combinations of extreme temperature, extreme atmospheric pressure and a specific vehicle model.

[0095] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the DPF regeneration control method provided by the above-mentioned methods, the method comprising: determining that both the engine state parameter and the post-processing state parameter are within a set range; obtaining a regeneration time interval threshold under the current extreme condition based on a pre-stored correction coefficient table or correction offset time table; and controlling the engine to perform a DPF regeneration operation according to the regeneration time interval threshold; wherein the correction coefficient table includes a regeneration time correction coefficient under different extreme conditions, the correction offset time table includes a regeneration time correction offset under different extreme conditions, and the extreme conditions include one or more combinations of extreme temperatures, extreme atmospheric pressures, and specific vehicle models.

[0096] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0097] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A DPF regeneration control method, characterized in that: include: Determining that the engine state parameters and the post-processing state parameters are within the set range; Based on a pre-stored correction coefficient table or correction offset time table, obtaining a regeneration time interval threshold under a current extreme situation; According to the regeneration time interval threshold, controlling the engine to perform a DPF regeneration operation; Among them, the correction coefficient table includes regeneration time correction coefficients under different extreme conditions, and the correction offset table includes regeneration time correction offsets under different extreme conditions. The extreme conditions include one or more combinations of extreme temperatures, extreme atmospheric pressures and specific vehicle models.

2. The DPF regeneration control method according to claim 1, characterized in that: The correction coefficient table includes correction coefficients for plateau regeneration time under different atmospheric pressures; Accordingly, obtaining the correction coefficient table specifically includes: When the engine state parameters and post-treatment state parameters are within the set range, the DPF carbon accumulation test is carried out under different atmospheric pressures to obtain the actual regeneration time interval on the plateau; Calculate the plateau regeneration time correction coefficient according to the preset plain regeneration time interval threshold and the plateau actual regeneration time interval under different atmospheric pressures to obtain the correction coefficient table; The correction coefficient table includes different atmospheric pressures and their corresponding plateau regeneration time correction coefficients.

3. The DPF regeneration control method according to claim 2, characterized in that: The obtaining of the regeneration time interval threshold under the current extreme situation based on the pre-stored correction coefficient table or correction offset time table includes: Obtaining a current atmospheric pressure value, and determining that the current atmospheric pressure value is lower than the standard atmospheric pressure; According to the current atmospheric pressure value, matching a corresponding target plateau regeneration time correction coefficient from the correction coefficient table; The regeneration time interval threshold is obtained according to the target plateau regeneration time correction coefficient and the preset plain regeneration time interval threshold.

4. The DPF regeneration control method according to claim 1, characterized in that: The modified offset schedule includes plateau regeneration time offsets at different atmospheric pressures; Accordingly, obtain the correction offset schedule, including: When the engine state parameters and post-treatment state parameters are within the set range, the DPF carbon accumulation test is carried out under different atmospheric pressures to obtain the actual regeneration time interval on the plateau; Calculate the plateau regeneration time offset according to the preset plain regeneration time interval threshold and the plateau actual regeneration time interval under different atmospheric pressures to obtain the corrected offset time table; The modified offset time table includes different atmospheric pressures and their corresponding plateau regeneration time offsets.

5. The DPF regeneration control method according to claim 4, characterized in that: The obtaining of the regeneration time interval threshold under the current extreme situation based on the pre-stored correction coefficient table or correction offset time table includes: Obtaining a current atmospheric pressure value, and determining that the current atmospheric pressure value is lower than the standard atmospheric pressure; According to the current atmospheric pressure value, matching a corresponding target plateau regeneration time offset from a pre-stored correction offset schedule; Get the time interval from the last successful regeneration; According to the target plateau regeneration time offset, the time interval from the last successful regeneration is corrected to obtain the regeneration time interval threshold; The target plateau regeneration time offset is greater than the preset plain regeneration time interval threshold, and the regeneration time interval threshold is the time interval from the plateau to the last successful regeneration.

6. The DPF regeneration control method according to any one of claims 1 to 5, characterized in that: The engine status parameters include water temperature, oil temperature and fuel level, and the post-processing status parameters include exhaust flow, DPF pressure difference and exhaust temperature.

7. A DPF regeneration control device, characterized in that: include: A parameter judgment module, used to determine that both the engine state parameter and the post-processing state parameter are within a set range; A regeneration time interval threshold value acquisition module, used to acquire the regeneration time interval threshold value under the current extreme situation based on a pre-stored correction coefficient table or correction offset time table; A DPF regeneration control module, used for controlling the engine to perform a DPF regeneration operation according to the regeneration time interval threshold; Among them, the correction coefficient table includes regeneration time correction coefficients under different extreme conditions, and the correction offset table includes regeneration time correction offsets under different extreme conditions. The extreme conditions include one or more combinations of extreme temperatures, extreme atmospheric pressures and specific vehicle models.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the DPF regeneration control method according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the DPF regeneration control method according to any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the DPF regeneration control method according to any one of claims 1 to 6 is implemented.

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