CN116104622A - DPF overload judging method, device, storage medium and equipment - Google Patents

DPF overload judging method, device, storage medium and equipment Download PDF

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Publication number
CN116104622A
CN116104622A CN202310391570.7A CN202310391570A CN116104622A CN 116104622 A CN116104622 A CN 116104622A CN 202310391570 A CN202310391570 A CN 202310391570A CN 116104622 A CN116104622 A CN 116104622A
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dpf
gas volume
exhaust gas
pressure difference
volume flow
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CN116104622B (en
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杜祥宁
杜慧娟
褚国良
刘阳
李钊
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/04—Filtering activity of particulate filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

The application discloses a DPF overload judging method, a device, a storage medium and equipment, wherein DPF differential pressure and waste gas volume flow of windows in a preset time period are monitored for each window to obtain the maximum value of the DPF differential pressure, the minimum value of the DPF differential pressure, the maximum value of the waste gas volume flow and the minimum value of the waste gas volume flow; calculating to obtain flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow; when the flow resistance is larger than the preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than the preset error reporting limit value, the DPF overload fault prompting information is reported.

Description

DPF overload judging method, device, storage medium and equipment
Technical Field
The present disclosure relates to the field of engines, and in particular, to a method, an apparatus, a storage medium, and a device for determining DPF overload.
Background
A particulate trap (Diesel Particulate Filter, DPF) is a ceramic filter installed in a diesel engine exhaust system that traps particulate emissions before they enter the atmosphere, thereby reducing the amount of dust emitted to the atmosphere.
For diesel engines with DPF, when the DPF carbon load is too much, the measured value of the differential pressure sensor arranged at two ends of the DPF can be increased (namely, the differential pressure value of the DPF is increased), if the differential pressure value of the DPF is larger than a preset threshold value, the DPF overload fault reminding can be reported, and the differential pressure sensor zero drift is caused by the water inlet of the differential pressure sensor or the accuracy problem of the differential pressure sensor, and when the differential pressure sensor zero drift is larger, the DPF overload fault can be wrongly reported.
Therefore, how to reduce the error reporting risk caused by the zero drift of the differential pressure sensor is a problem to be solved in the art.
Disclosure of Invention
The application provides a DPF overload judging method, a device, a storage medium and equipment, and aims to reduce error reporting risks caused by zero drift of a differential pressure sensor.
In order to achieve the above object, the present application provides the following technical solutions:
a method for determining DPF overload, comprising:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow and a minimum value of the exhaust gas volume flow;
calculating a flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow;
and when the flow resistance is larger than a preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than a preset error reporting limit value, reporting the prompt information of DPF overload faults.
Optionally, for each window, monitoring a DPF pressure difference and an exhaust gas volume flow of the window in a preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow and a minimum value of the exhaust gas volume flow, including:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain each DPF pressure difference and each exhaust gas volume flow;
screening a maximum value of the DPF differential pressure and a minimum value of the DPF differential pressure from the DPF differential pressures;
and screening the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow from the exhaust gas volume flows.
Optionally, after calculating the flow resistance, the flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow rate, and the minimum value of the exhaust gas volume flow rate, the flow resistance calculation method further includes:
and when the flow resistance of any window is not larger than the preset flow resistance limit value, determining that the DPF has no overload fault.
Optionally, the method further comprises:
and when the maximum value of the DPF pressure difference of any window is not larger than the preset error reporting limit value, determining that the DPF has no overload fault.
A device for determining DPF overload, comprising:
the monitoring unit is used for monitoring DPF pressure difference and exhaust gas volume flow of each window in a preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow and a minimum value of the exhaust gas volume flow;
a calculation unit for calculating a flow resistance based on a maximum value of the DPF differential pressure, a minimum value of the DPF differential pressure, a maximum value of the exhaust gas volume flow rate, and a minimum value of the exhaust gas volume flow rate;
and the prompting unit is used for reporting prompting information of DPF overload faults when the flow resistance is larger than a preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than a preset error reporting limit value.
Optionally, the monitoring unit is specifically configured to:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain each DPF pressure difference and each exhaust gas volume flow;
screening a maximum value of the DPF differential pressure and a minimum value of the DPF differential pressure from the DPF differential pressures;
and screening the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow from the exhaust gas volume flows.
Optionally, the method further comprises:
and when the flow resistance of any window is not larger than the preset flow resistance limit value, determining that the DPF has no overload fault.
Optionally, the method further comprises:
and when the maximum value of the DPF pressure difference of any window is not larger than the preset error reporting limit value, determining that the DPF has no overload fault.
A computer readable storage medium comprising a stored program, wherein the program when executed by a processor performs the method of determining DPF overload.
A DPF overload judging apparatus comprising: a processor, a memory, and a bus; the processor is connected with the memory through the bus;
the memory is used for storing a program, and the processor is used for running the program, wherein the program is executed by the processor to execute the DPF overload judging method.
According to the technical scheme, for each window, the DPF pressure difference and the exhaust gas volume flow of the window in a preset time period are monitored to obtain the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow; calculating to obtain flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow; when the flow resistance is larger than the preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than the preset error reporting limit value, the DPF overload fault prompting information is reported.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for determining DPF overload according to an embodiment of the present application;
FIG. 2 is a flow chart of another DPF overload determination method according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a DPF overload determination device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a DPF overload judging device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In this application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As shown in fig. 1, a flowchart of a method for determining DPF overload according to an embodiment of the present application includes:
s101: and monitoring DPF pressure differences and exhaust gas volume flows of the windows in a preset time period for each window to obtain each DPF pressure difference and each exhaust gas volume flow.
Alternatively, the preset time period may be set according to actual conditions, and is not particularly limited herein.
Note that, each window should satisfy: the engine running time is longer than the specified time, the DPF temperature is in a preset range, the exhaust gas volume flow is longer than the preset exhaust gas volume flow, and the last regeneration time is longer than the target time; the specified time, the preset range, the exhaust gas volume flow and the target time can be set according to actual conditions.
S102: and screening the maximum value and the minimum value of the DPF differential pressure from the DPF differential pressures.
Specifically, it is assumed that five DPF differential pressures are provided, which are a first DPF differential pressure, a second DPF differential pressure, a third DPF differential pressure, a fourth DPF differential pressure, and a fifth DPF differential pressure, respectively, and the first DPF differential pressure is: 6%, second DPF differential pressure is: 7%, third DPF differential pressure: 8%, the fourth DPF differential pressure is: 10%, the fifth DPF differential pressure is 9%, the maximum value of the DPF differential pressure screened from the five DPF differential pressures is 10%, and the minimum value of the DPF differential pressure is 6%.
The maximum value and the minimum value of the DPF differential pressure are selected from the respective DPF differential pressures so as to be calculated by using the maximum value and the minimum value of the DPF differential pressure in the following steps.
S103: the maximum and the minimum of the exhaust gas volume flows are selected from the individual exhaust gas volume flows.
Specifically, assume that there are three exhaust volumesThe flow rates are respectively a first waste gas volume flow rate, a second waste gas volume flow rate and a third waste gas volume flow rate, and the first waste gas volume flow rate is 10m 3 And/h, the second exhaust gas volume flow is 20m 3 And/h, the third three-waste gas volumetric flow is 15m 3 Screening the three exhaust gas volume flows to obtain the maximum value of 20m 3 And the minimum value of the volume flow of the waste gas is 10m 3 /h。
The maximum and minimum exhaust gas volume flows are selected from the respective exhaust gas volume flows, so that the calculation is performed subsequently using the maximum and minimum exhaust gas volume flows.
S104: the flow resistance is calculated based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow rate, and the minimum value of the exhaust gas volume flow rate.
The specific implementation process for calculating the flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow is as follows: the calculation is performed using a flow resistance calculation formula, wherein the specific expression form of the flow resistance calculation formula is shown as formula (1).
F=(P max -P min )/(V max -V min )（1）
In the formula (1), F is flow resistance, P max Maximum value of DPF differential pressure, P min Is the minimum value of DPF pressure difference, V max For maximum volumetric flow of exhaust gas, V min Minimum value of the exhaust gas volume flow.
S105: judging whether the flow resistance is larger than a preset flow resistance limit value.
If the flow resistance is greater than the preset flow resistance limit, S106 is performed, otherwise S107 is performed.
Specifically, assuming that the flow resistance is 20, the preset flow resistance limit is 15, it is judged whether the flow resistance is greater than the preset flow resistance limit, and it is obvious that the flow resistance is greater than the preset flow resistance limit, for which reason, S106 is continued.
Specifically, assuming that the flow resistance is 10, the preset flow resistance limit is 15, it is judged whether the flow resistance is greater than the preset flow resistance limit, and it is obvious that the flow resistance is not greater than the preset flow resistance limit, and for this reason, S107 is continued.
The preset flow resistance limit value is set
Figure SMS_1
The setting may be made according to the actual situation, and no limitation is made here.
S106: and judging whether the maximum value of the DPF differential pressure is larger than a preset error reporting limit value.
If the maximum value of the DPF pressure difference is greater than the preset error reporting limit, S108 is executed, otherwise S109 is executed.
Specifically, assuming that the maximum value of the DPF differential pressure is 11%, the preset error reporting limit value is 10%, it is determined whether the maximum value of the DPF differential pressure is greater than the preset error reporting limit value, and it is obvious that the maximum value of the DPF differential pressure is greater than the preset error reporting limit value, for this reason, S108 is continued to be executed.
Specifically, assuming that the maximum value of the DPF differential pressure is 11%, the preset error reporting limit value is 15%, it is determined whether the maximum value of the DPF differential pressure is greater than the preset error reporting limit value, and it is obvious that the maximum value of the DPF differential pressure is not greater than the preset error reporting limit value, for this reason, S109 is continuously performed.
It should be noted that, preset error reporting limit value
Figure SMS_2
The setting may be made according to the actual situation, and no particular limitation is made here.
S107: it is determined that no overload failure of the DPF has occurred.
When the flow resistance is not greater than the preset flow resistance limit, the DPF carbon loading does not reach the error reporting limit, and the differential pressure sensor may be zero drift, so that it is determined that the DPF is not overloaded.
The carbon loading of the DPF is essentially the weight of particulate matter such as soot in a unit volume of the carrier after the DPF has been used for a while, and is the carbon loading if the particulate matter is soot.
S108: and (5) reporting the prompt information of DPF overload faults.
When the flow resistance is greater than the preset flow resistance limit value and the maximum value of the DPF pressure difference is greater than the preset error reporting limit value, the DPF carbon load reaches the target error reporting limit value, so that the prompt information of the DPF overload fault is reported.
S109: it is determined that no overload failure of the DPF has occurred.
It should be noted that, when the maximum value of the DPF differential pressure is not greater than the preset error reporting limit value, the DPF carbon load does not reach the error reporting limit value, and the differential pressure sensor may be zero drift, so it is determined that the DPF is not overloaded.
In summary, for each window, monitoring the DPF pressure difference and the exhaust gas volume flow rate of the window within the preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow rate and a minimum value of the exhaust gas volume flow rate; calculating to obtain flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow; when the flow resistance is larger than the preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than the preset error reporting limit value, the DPF overload fault prompting information is reported.
As shown in fig. 2, a flowchart of another method for determining DPF overload according to an embodiment of the present application includes:
s201: and monitoring DPF pressure difference and exhaust gas volume flow of the windows in a preset time period for each window to obtain the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow.
S202: the flow resistance is calculated based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow rate, and the minimum value of the exhaust gas volume flow rate.
S203: when the flow resistance is larger than a preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than a preset error reporting limit value, reporting the prompt information of the DPF overload fault.
In summary, for each window, monitoring the DPF pressure difference and the exhaust gas volume flow rate of the window within the preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow rate and a minimum value of the exhaust gas volume flow rate; calculating to obtain flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow; when the flow resistance is larger than the preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than the preset error reporting limit value, the DPF overload fault prompting information is reported.
As shown in fig. 3, an architecture diagram of a device for determining DPF overload according to an embodiment of the present application includes:
and the monitoring unit 100 is configured to monitor, for each window, a DPF pressure difference and an exhaust gas volume flow rate of the window within a preset period of time, so as to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow rate, and a minimum value of the exhaust gas volume flow rate.
The monitoring unit 100 is specifically configured to: monitoring DPF pressure differences and exhaust gas volume flows of windows in a preset time period for each window to obtain each DPF pressure difference and each exhaust gas volume flow; screening a maximum value of the DPF differential pressure from the DPF differential pressures and a minimum value of the DPF differential pressure; the maximum and the minimum of the exhaust gas volume flows are selected from the individual exhaust gas volume flows.
The calculating unit 200 is configured to calculate the flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow rate, and the minimum value of the exhaust gas volume flow rate.
The calculating unit 200 is further configured to determine that the DPF has not failed due to overload when any one of the window flow resistances is not greater than the preset flow resistance limit value.
And the prompting unit 300 is used for reporting the prompting information of the DPF overload fault when the flow resistance is larger than the preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than the preset error reporting limit value.
The prompting unit 300 is further configured to determine that the DPF has not failed due to overload when the maximum value of the DPF differential pressure in any one window is not greater than the preset error reporting limit value.
In summary, for each window, monitoring the DPF pressure difference and the exhaust gas volume flow rate of the window within the preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow rate and a minimum value of the exhaust gas volume flow rate; calculating to obtain flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow; when the flow resistance is larger than the preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than the preset error reporting limit value, the DPF overload fault prompting information is reported.
The application also provides a computer readable storage medium, wherein the computer readable storage medium comprises a stored program, and the program executes the DPF overload judging method provided by the application.
As shown in fig. 4, the present application further provides a device for determining DPF overload, including: a processor 401, a memory 402, and a bus 403. The processor 401 is connected to the memory 402 through the bus 403, the memory 402 is used for storing a program, and the processor 401 is used for running the program, wherein the method for judging the DPF overload provided by the application is executed when the program runs, and comprises the following steps:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow and a minimum value of the exhaust gas volume flow;
calculating a flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow;
and when the flow resistance is larger than a preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than a preset error reporting limit value, reporting the prompt information of DPF overload faults.
Optionally, for each window, monitoring a DPF pressure difference and an exhaust gas volume flow of the window in a preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow and a minimum value of the exhaust gas volume flow, including:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain each DPF pressure difference and each exhaust gas volume flow;
screening a maximum value of the DPF differential pressure and a minimum value of the DPF differential pressure from the DPF differential pressures;
and screening the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow from the exhaust gas volume flows.
Optionally, after calculating the flow resistance, the flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow rate, and the minimum value of the exhaust gas volume flow rate, the flow resistance calculation method further includes:
and when the flow resistance of any window is not larger than the preset flow resistance limit value, determining that the DPF has no overload fault.
Optionally, the method further comprises:
and when the maximum value of the DPF pressure difference of any window is not larger than the preset error reporting limit value, determining that the DPF has no overload fault.
The functions described in the methods of the present application, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computing device readable storage medium. Based on such understanding, a portion of the embodiments of the present application that contributes to the prior art or a portion of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computing device (which may be a personal computer, a server, a mobile computing device or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A method for determining overload of a DPF, comprising:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow and a minimum value of the exhaust gas volume flow;
calculating a flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow;
and when the flow resistance is larger than a preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than a preset error reporting limit value, reporting the prompt information of DPF overload faults.
2. The method of claim 1, wherein monitoring the DPF pressure difference and the exhaust gas volume flow rate of the window for each window for a predetermined period of time, to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow rate, and a minimum value of the exhaust gas volume flow rate, comprises:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain each DPF pressure difference and each exhaust gas volume flow;
screening a maximum value of the DPF differential pressure and a minimum value of the DPF differential pressure from the DPF differential pressures;
and screening the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow from the exhaust gas volume flows.
3. The method of claim 1, wherein the calculating the flow resistance based on the maximum value of the DPF pressure difference, the minimum value of the DPF pressure difference, the maximum value of the exhaust gas volume flow rate, and the minimum value of the exhaust gas volume flow rate further comprises:
and when the flow resistance of any window is not larger than the preset flow resistance limit value, determining that the DPF has no overload fault.
4. The method as recited in claim 1, further comprising:
and when the maximum value of the DPF pressure difference of any one window is not larger than the preset error reporting limit value, determining that the DPF has no overload fault.
5. A DPF overload judging device, characterized by comprising:
the monitoring unit is used for monitoring DPF pressure difference and exhaust gas volume flow of each window in a preset time period to obtain a maximum value of the DPF pressure difference, a minimum value of the DPF pressure difference, a maximum value of the exhaust gas volume flow and a minimum value of the exhaust gas volume flow;
a calculation unit for calculating a flow resistance based on a maximum value of the DPF differential pressure, a minimum value of the DPF differential pressure, a maximum value of the exhaust gas volume flow rate, and a minimum value of the exhaust gas volume flow rate;
and the prompting unit is used for reporting prompting information of DPF overload faults when the flow resistance is larger than a preset flow resistance limit value and the maximum value of the DPF pressure difference is larger than a preset error reporting limit value.
6. The device according to claim 5, wherein the monitoring unit is specifically configured to:
for each window, monitoring DPF pressure difference and exhaust gas volume flow of the window in a preset time period to obtain each DPF pressure difference and each exhaust gas volume flow;
screening a maximum value of the DPF differential pressure and a minimum value of the DPF differential pressure from the DPF differential pressures;
and screening the maximum value of the exhaust gas volume flow and the minimum value of the exhaust gas volume flow from the exhaust gas volume flows.
7. The apparatus as recited in claim 5, further comprising:
and when the flow resistance of any window is not larger than the preset flow resistance limit value, determining that the DPF has no overload fault.
8. The apparatus as recited in claim 5, further comprising:
and when the maximum value of the DPF pressure difference of any window is not larger than the preset error reporting limit value, determining that the DPF has no overload fault.
9. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program when run by a processor performs the method of determining a DPF overload according to any one of claims 1-4.
10. A DPF overload judging apparatus, characterized by comprising: a processor, a memory, and a bus; the processor is connected with the memory through the bus;
the memory is used for storing a program, and the processor is used for running the program, wherein the program is executed by the processor to execute the method for judging the overload of the DPF according to any one of claims 1 to 4.
CN202310391570.7A 2023-04-13 2023-04-13 DPF overload judging method, device, storage medium and equipment Active CN116104622B (en)

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CN110657009A (en) * 2019-12-02 2020-01-07 潍柴动力股份有限公司 Method and device for generating ash removal processing request of particle catcher
CN110941917A (en) * 2019-12-17 2020-03-31 凯龙高科技股份有限公司 Diesel engine DPF carbon loading capacity calculation method based on pressure drop
CN111691957A (en) * 2020-07-06 2020-09-22 潍柴动力股份有限公司 Active regeneration control method and control system of DPF
CN114165346A (en) * 2020-09-11 2022-03-11 北京福田康明斯发动机有限公司 Precision detection method and system of DPF (diesel particulate filter) differential pressure sensor and storage medium

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EP1081347A1 (en) * 1999-09-03 2001-03-07 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Method to determine the amount of diesel particulate accumulated in a DPF
US20070144152A1 (en) * 2005-12-23 2007-06-28 Robert Bosch Gmbh Procedure and control unit to operate an integrated SCR/DPF system
CN110657009A (en) * 2019-12-02 2020-01-07 潍柴动力股份有限公司 Method and device for generating ash removal processing request of particle catcher
CN110941917A (en) * 2019-12-17 2020-03-31 凯龙高科技股份有限公司 Diesel engine DPF carbon loading capacity calculation method based on pressure drop
CN111691957A (en) * 2020-07-06 2020-09-22 潍柴动力股份有限公司 Active regeneration control method and control system of DPF
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