CN117167123A - DPF low-temperature active regeneration control method, device and equipment - Google Patents
DPF low-temperature active regeneration control method, device and equipment Download PDFInfo
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Abstract
The present disclosure relates to a method, a device and equipment for controlling DPF low-temperature active regeneration, wherein the method comprises: acquiring engine performance parameters of a vehicle; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation; if the DPF is in a non-overload fault state and the engine performance parameter meets a set condition, determining an upstream and downstream differential pressure of a standard DPF based on the engine exhaust gas volume flow in the engine performance parameter and a set corresponding relation; determining whether to trigger DPF low-temperature active regeneration based on a magnitude relationship between DPF upstream and downstream differential pressures in the engine performance parameters and the standard DPF upstream and downstream differential pressures. The present disclosure can reduce the condition of DPF overload, thereby reducing the risk of DPF slip or DPF burnout due to DPF overload.
Description
Technical Field
The disclosure relates to the technical field of engine aftertreatment, in particular to a DPF low-temperature active regeneration control method, device and equipment.
Background
A diesel particulate filter (Diesel Particulate Filter, DPF) is a ceramic filter installed in a diesel engine exhaust system that can trap particulate emissions before they enter the atmosphere. Thereby reducing the amount of dust emitted to the atmosphere. DPFs filter and trap particulate matter in engine exhaust primarily through diffusion, deposition, and impingement mechanisms. The exhaust gas flows through the trap where particulate matter is trapped within the filter element of the filter body, leaving cleaner exhaust gas to be discharged into the atmosphere. The exhaust particulate matter of an engine mainly comprises two components: unburned Soot (root), ash (Ash), where particulate emissions are mostly composed of tiny particles of carbon and carbide. Over time, more and more particulate matter builds up on the DPF, which if not cleaned in time, can easily cause clogging, causing overload failure.
Because the DPF reaches the excessive particulate matters accumulated on the DPF when overload, the DPF can not be eliminated through an active regeneration mode, and if a user does not perform service regeneration in time, the DPF is easy to deviate from or burn down.
Therefore, how to reduce the risk of DPF slip or DPF burnout due to DPF overload is a current problem to be solved.
Disclosure of Invention
The disclosure provides a DPF low-temperature active regeneration control method, a device and equipment, which can reduce the overload condition of a DPF, thereby reducing the risk of DPF falling out or DPF burning caused by the overload condition of the DPF.
According to a first aspect of embodiments of the present disclosure, there is provided a DPF low-temperature active regeneration control method, including:
acquiring engine performance parameters of a vehicle; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation;
if the DPF is in a non-overload fault state and the engine performance parameter meets a set condition, determining an upstream-downstream differential pressure of a standard DPF based on the engine exhaust gas volume flow in the engine performance parameter and a set corresponding relation, wherein the set corresponding relation is a corresponding relation between the engine exhaust gas volume flow and the upstream-downstream differential pressure of each standard DPF;
determining whether to trigger DPF low-temperature active regeneration based on a magnitude relationship between DPF upstream and downstream differential pressures in the engine performance parameters and the standard DPF upstream and downstream differential pressures.
According to the technical scheme provided by the embodiment of the disclosure, under the condition that the DPF is in a non-overload fault state, the DPF low-temperature active regeneration is determined to be needed to reduce the accumulated particulate matters on the DPF based on the acquired engine performance parameters and the set conditions, and the DPF low-temperature active regeneration is determined based on the engine exhaust volume flow in the engine performance parameters and the set corresponding relation, and whether the DPF low-temperature active regeneration is triggered is determined based on the magnitude relation between the DPF upstream-downstream pressure difference in the engine performance parameters and the standard DPF upstream-downstream pressure difference, namely the DPF low-temperature active regeneration is increased, the differential pressure before DPF release is performed based on the standard DPF upstream-downstream pressure difference corresponding to the engine exhaust volume flow, the differential pressure upstream-downstream pressure difference is smaller than the differential pressure determined based on the engine exhaust volume flow when the DPF overload is judged in the prior art, and when the differential pressure before DPF release is triggered, the DPF low-temperature active regeneration is not very high, so that the DPF overload condition is reduced, and the DPF or the DPF risk caused by the DPF overload is reduced.
In one possible implementation, it is determined whether the DPF is in a non-overload fault condition by:
if the DPF carbon loading in the engine performance parameters is smaller than the set carbon loading, determining that the DPF is in a non-overload fault state; or,
and if the upstream and downstream differential pressure of the DPF in the engine performance parameters is smaller than a set differential pressure threshold value, determining that the DPF is in a non-overload fault state.
According to the technical scheme provided by the embodiment of the disclosure, whether the DPF is in a non-overload fault state is judged through the magnitude relation between the carbon loading capacity of the DPF and the set carbon loading capacity or the magnitude relation between the upstream and downstream differential pressure of the DPF and the set differential pressure threshold value, so that the judgment accuracy is improved.
In one possible implementation, the setting condition includes some or all of the following:
the engine speed in the engine performance parameters is in a set speed range;
the oil injection quantity of the oil injection device in the engine performance parameters is in a set oil injection quantity range;
the volume flow of engine exhaust gas in the engine performance parameters is greater than a set threshold;
the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state;
the state of the pressure sensors respectively positioned at the upstream and downstream of the DPF in the engine performance parameters is the dew point detection completion state.
According to the technical scheme provided by the embodiment of the disclosure, whether DPF low-temperature active regeneration is needed to be performed or not is determined according to the relation between parameters such as the engine rotating speed, the fuel injection quantity, the engine exhaust gas volume flow and the state of the pressure sensor and corresponding set conditions so as to reduce the particulate matters accumulated on the DPF, and the judgment accuracy is improved.
In one possible implementation, it is determined whether the engine exhaust gas volumetric flow rate in the engine performance parameter is at steady state by:
and if the difference value between the engine exhaust gas volume flow after the engine exhaust gas volume flow is subjected to filtering treatment and the engine exhaust gas volume flow is smaller than a set difference threshold value, determining that the engine exhaust gas volume flow in the engine performance parameters is in a stable state.
In one possible implementation, before determining the standard DPF upstream-downstream differential pressure, the method further includes:
filtering the engine exhaust gas volume flow to obtain filtered engine exhaust gas volume flow;
determining a standard DPF upstream-downstream differential pressure based on the engine exhaust gas volume flow and a set correspondence in the engine performance parameters, comprising:
and determining a standard DPF upstream-downstream pressure difference corresponding to the filtered engine exhaust gas volume flow based on the filtered engine exhaust gas volume flow and the set corresponding relation.
According to the technical scheme provided by the embodiment of the disclosure, the accuracy of the engine exhaust gas volume flow is improved by filtering the engine exhaust gas volume flow, and the upstream and downstream differential pressure of the standard DPF is determined based on the filtered engine exhaust gas volume flow and the set corresponding relation, so that the accuracy of the upstream and downstream differential pressure of the standard DPF is improved.
In one possible implementation, before determining whether to trigger the DPF low-temperature active regeneration, the method further includes:
filtering the upstream and downstream differential pressure of the DPF to obtain the filtered upstream and downstream differential pressure of the DPF;
determining whether to trigger DPF low temperature active regeneration based on a magnitude relationship between a DPF upstream-downstream pressure difference in the engine performance parameters and the standard DPF upstream-downstream pressure difference, comprising:
and determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the upstream and downstream differential pressures of the DPF after filtering and the upstream and downstream differential pressures of the standard DPF.
According to the technical scheme provided by the embodiment of the disclosure, the filter treatment is performed on the DPF upstream and downstream pressure difference, so that the accuracy of the DPF upstream and downstream pressure difference is improved, whether the DPF low-temperature active regeneration is triggered or not is determined based on the magnitude relation between the filtered DPF upstream and downstream pressure difference and the standard DPF upstream and downstream pressure difference, and the accuracy of judging whether the DPF low-temperature active regeneration is triggered or not is improved.
In one possible implementation, the determining whether to trigger DPF low temperature active regeneration based on a magnitude relationship between the filtered DPF upstream-downstream pressure difference and the standard DPF upstream-downstream pressure difference includes:
and if the upstream and downstream differential pressure of the DPF after filtering is greater than or equal to the upstream and downstream differential pressure of the standard DPF, triggering DPF low-temperature active regeneration.
According to the technical scheme provided by the embodiment of the disclosure, when the upstream and downstream differential pressure of the DPF after filtering is greater than or equal to the upstream and downstream differential pressure of the standard DPF, the DPF is triggered to actively regenerate at low temperature, so that the accumulated particulate matters on the DPF are reduced, the condition of DPF overload is reduced, and the risk of DPF falling off or DPF burning caused by the DPF overload is further reduced.
According to a second aspect of embodiments of the present disclosure, there is provided a DPF low-temperature active regeneration control device, the device including:
the acquisition module is used for acquiring engine performance parameters of the vehicle; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation;
the first determining module is used for determining the upstream and downstream differential pressures of the standard DPF based on the engine exhaust gas volume flow and a set corresponding relation in the engine performance parameters if the DPF is in a non-overload fault state and the engine performance parameters meet set conditions, wherein the set corresponding relation is the corresponding relation between the engine exhaust gas volume flow and the upstream and downstream differential pressures of the standard DPF;
and the second determining module is used for determining whether to trigger DPF low-temperature active regeneration or not based on the magnitude relation between the DPF upstream and downstream pressure difference in the engine performance parameters and the standard DPF upstream and downstream pressure difference.
In one possible implementation, the first determining module is configured to determine whether the DPF is in a non-overload fault state by:
if the DPF carbon loading in the engine performance parameters is smaller than the set carbon loading, determining that the DPF is in a non-overload fault state; or,
and if the upstream and downstream differential pressure of the DPF in the engine performance parameters is smaller than a set differential pressure threshold value, determining that the DPF is in a non-overload fault state.
In one possible implementation, the setting condition includes some or all of the following:
the engine speed in the engine performance parameters is in a set speed range;
the oil injection quantity of the oil injection device in the engine performance parameters is in a set oil injection quantity range;
the volume flow of engine exhaust gas in the engine performance parameters is greater than a set threshold;
the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state;
the state of the pressure sensors respectively positioned at the upstream and downstream of the DPF in the engine performance parameters is the dew point detection completion state.
In one possible implementation, the first determination module is configured to determine whether an engine exhaust gas volumetric flow rate in the engine performance parameter is in a steady state by:
and if the difference value between the engine exhaust gas volume flow after the engine exhaust gas volume flow is subjected to filtering treatment and the engine exhaust gas volume flow is smaller than a set difference threshold value, determining that the engine exhaust gas volume flow in the engine performance parameters is in a stable state.
In one possible implementation, before determining the standard DPF upstream-downstream differential pressure, the first determining module is further configured to:
filtering the engine exhaust gas volume flow to obtain filtered engine exhaust gas volume flow;
the first determining module is configured to:
and determining a standard DPF upstream-downstream pressure difference corresponding to the filtered engine exhaust gas volume flow based on the filtered engine exhaust gas volume flow and the set corresponding relation.
In one possible implementation, before determining whether to trigger the DPF low-temperature active regeneration, the second determining module is further configured to:
filtering the upstream and downstream differential pressure of the DPF to obtain the filtered upstream and downstream differential pressure of the DPF;
the second determining module is configured to:
and determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the upstream and downstream differential pressures of the DPF after filtering and the upstream and downstream differential pressures of the standard DPF.
In one possible implementation manner, the second determining module is configured to:
and if the upstream and downstream differential pressure of the DPF after filtering is greater than or equal to the upstream and downstream differential pressure of the standard DPF, triggering DPF low-temperature active regeneration.
According to a third aspect of embodiments of the present disclosure, there is provided an apparatus comprising: a processor; a memory for storing processor-executable instructions; wherein the processor executes the executable instructions to implement the steps of the DPF low temperature active regeneration control method.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the above-described DPF low temperature active regeneration control method.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present disclosure, and that other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a schematic illustration of an application scenario shown according to an exemplary embodiment;
FIG. 2 is a flowchart illustrating a method for DPF low temperature active regeneration control, according to an exemplary embodiment;
FIG. 3 is a specific flow chart illustrating a DPF low temperature active regeneration control method according to an exemplary embodiment;
FIG. 4 is a detailed flow chart of a DPF low temperature active regeneration control method, according to an exemplary embodiment;
FIG. 5 is a schematic diagram illustrating a DPF low temperature active regeneration control apparatus in accordance with an exemplary embodiment;
FIG. 6 is a schematic diagram of an electronic device showing a DPF low temperature active regeneration control method, according to an exemplary embodiment;
FIG. 7 is a program product schematic diagram illustrating a DPF low temperature active regeneration control method, according to an exemplary embodiment.
Detailed Description
For the purpose of promoting an understanding of the principles and advantages of the disclosure, reference will now be made in detail to the drawings, in which it is apparent that the embodiments described are only some, but not all embodiments of the disclosure. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the disclosure, are within the scope of the disclosure based on the embodiments in the disclosure.
Some words appearing hereinafter are explained:
1. the term "and/or" in the embodiments of the present disclosure describes an association relationship of association objects, which indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
2. The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the disclosure described herein may be capable of operation in sequences other than those illustrated or described herein.
The application scenario described in the embodiments of the present disclosure is for more clearly describing the technical solution of the embodiments of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiments of the present disclosure, and as a person of ordinary skill in the art can know that, with the appearance of a new application scenario, the technical solution provided by the embodiments of the present disclosure is equally applicable to similar technical problems. In the description of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.
A DPF is a ceramic filter installed in a diesel engine exhaust system that can trap particulate emissions before they enter the atmosphere. Thereby reducing the amount of dust emitted to the atmosphere. DPFs filter and trap particulate matter in engine exhaust primarily through diffusion, deposition, and impingement mechanisms. The exhaust gas flows through the trap where particulate matter is trapped within the filter element of the filter body, leaving cleaner exhaust gas to be discharged into the atmosphere. The exhaust particulate matter of an engine mainly comprises two components: unburned soot, ash, where particulate emissions are mostly composed of tiny particles of carbon and carbide. Over time, more and more particulate matter builds up on the DPF, which if not cleaned in time, can easily cause clogging, causing overload failure.
Because the DPF reaches the excessive particulate matters accumulated on the DPF when overload, the DPF can not be eliminated through an active regeneration mode, and if a user does not perform service regeneration in time, the DPF is easy to deviate from or burn down.
Therefore, in order to solve the above-mentioned problems, the present disclosure provides a control method, apparatus and device for DPF low-temperature active regeneration, which can reduce the condition of DPF overload, thereby reducing the risk of DPF slip or DPF burnout caused by DPF overload.
Referring first to fig. 1, which is a schematic view of an application scenario of an embodiment of the present disclosure, including an engine 11 and an electronic control unit (Electronic Control Unit, ECU) 12, wherein the engine 11 is configured to send engine performance parameters of a vehicle to the electronic control unit 12; the electronic control unit 12 is configured to determine whether to trigger a low temperature active regeneration of the DPF based on engine performance parameters sent by the engine 11.
In the embodiment of the present disclosure, as an optional implementation manner, the electronic control unit 12 obtains engine performance parameters of the vehicle sent by the engine 11; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation; if the DPF is in a non-overload fault state and the engine performance parameter meets a set condition, determining an upstream-downstream differential pressure of a standard DPF based on the engine exhaust gas volume flow in the engine performance parameter and a set corresponding relation, wherein the set corresponding relation is a corresponding relation between the engine exhaust gas volume flow and the upstream-downstream differential pressure of each standard DPF; determining whether to trigger DPF low-temperature active regeneration based on a magnitude relationship between DPF upstream and downstream differential pressures in the engine performance parameters and the standard DPF upstream and downstream differential pressures.
In some embodiments, a method for controlling DPF low-temperature active regeneration provided in the present disclosure is described below by way of specific embodiments, as shown in fig. 2, including:
step 201, obtaining engine performance parameters of a vehicle;
wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation. The engine performance parameters comprise parameters such as DPF carbon loading, DPF upstream and downstream pressure difference, engine rotation speed, fuel injection quantity of a fuel injection device, engine exhaust gas volume flow, states of pressure sensors respectively positioned at the upstream and downstream of the DPF and the like.
Step 202, if the DPF is in a non-overload fault state and the engine performance parameter meets a set condition, determining an upstream-downstream differential pressure of a standard DPF based on the engine exhaust gas volume flow in the engine performance parameter and a set corresponding relation;
specifically, the present disclosure may determine whether the DPF is in a non-overload fault condition based on a magnitude relationship between a DPF carbon loading and a set carbon loading. The present disclosure may also determine whether the DPF is in a non-overload fault condition based on a magnitude relationship between a differential pressure upstream and downstream of the DPF and a set differential pressure threshold. The disclosure may also determine whether the DPF is in a non-overload fault condition based on a magnitude relationship between a DPF carbon loading and a set carbon loading, and a magnitude relationship between a DPF upstream-downstream differential pressure and a set differential pressure threshold.
The set corresponding relation is the corresponding relation between the volume flow of the exhaust gas of each engine and the upstream and downstream differential pressure of each standard DPF. The standard DPF upstream and downstream differential pressure may be the corresponding differential pressure at a carbon loading of 4g/L (grams/liter).
Step 203, determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the DPF upstream-downstream pressure difference in the engine performance parameters and the standard DPF upstream-downstream pressure difference.
The present disclosure obtains a pressure value 1 detected by a pressure sensor 1 located upstream of the DPF and a pressure value 2 detected by a pressure sensor 2 located downstream of the DPF, and regards a difference between the pressure value 2 and the pressure value 1 as a DPF upstream-downstream pressure difference.
Specifically, if the differential pressure between the upstream and downstream of the DPF is greater than or equal to the differential pressure between the upstream and downstream of the standard DPF, triggering DPF low-temperature active regeneration; and if the upstream and downstream differential pressure of the DPF is smaller than the upstream and downstream differential pressure of the standard DPF, prohibiting triggering the DPF to actively regenerate at low temperature.
In the prior art, only the differential pressure corresponding to the determination of the volume flow of the exhaust gas is calibrated to judge the DPF overload, when the DPF overload is judged, the differential pressure determined based on the volume flow of the exhaust gas is generally the differential pressure corresponding to the carbon loading of 5g/L, but when the DPF overload is triggered, active regeneration cannot be carried out, and only ash removal treatment can be carried out. According to the technical scheme provided by the embodiment of the disclosure, under the condition that the DPF is in a non-overload fault state, the DPF low-temperature active regeneration is determined to be needed to reduce the accumulated particulate matters on the DPF based on the acquired engine performance parameters and the set conditions, and the upstream and downstream differential pressures of the standard DPF are determined based on the engine exhaust volume flow in the engine performance parameters and the set corresponding relation, and based on the magnitude relation between the upstream and downstream differential pressures of the DPF in the engine performance parameters and the upstream and downstream differential pressures of the standard DPF, whether the DPF low-temperature active regeneration is triggered is determined, namely the DPF low-temperature active regeneration is increased, namely the advanced recognition of the DPF is performed based on the upstream and downstream differential pressures of the standard DPF corresponding to the engine exhaust volume flow, the upstream and downstream differential pressures of the standard DPF are generally the differential pressures corresponding to the differential pressures when the carbon load is 4g/L, the upstream and downstream differential pressures of the standard DPF are smaller than the differential pressure determined based on the engine exhaust volume flow when the DPF is judged to be overloaded in the prior art, and the DPF low-temperature active regeneration is performed when the advanced recognition of the DPF is triggered, so that the DPF low-temperature active regeneration is enabled, and the DPF or the risk of the DPF is burnt down due to the DPF overload is reduced is further reduced.
The following describes the specific steps of the DPF low-temperature active regeneration control method provided above in detail, as shown in fig. 3, including:
in step 301, engine performance parameters of a vehicle are obtained.
Wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation.
Step 302, determines that the DPF is in a non-overload fault condition.
Optionally, determining whether the DPF is in a non-overload fault condition by:
if the DPF carbon loading in the engine performance parameters is smaller than the set carbon loading, determining that the DPF is in a non-overload fault state; or,
and if the upstream and downstream differential pressure of the DPF in the engine performance parameters is smaller than a set differential pressure threshold value, determining that the DPF is in a non-overload fault state.
The set carbon loading may be set according to actual conditions. The set differential pressure threshold may be set according to actual conditions, for example, the set differential pressure threshold is a differential pressure corresponding to a carbon loading of 5g/L (g/L).
Step 303, determining that the engine performance parameter meets a set condition.
The above setting conditions include some or all of the following:
the engine speed in the engine performance parameters is in a set speed range;
the oil injection quantity of the oil injection device in the engine performance parameters is in a set oil injection quantity range;
the volume flow of engine exhaust gas in the engine performance parameters is greater than a set threshold;
the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state;
the state of the pressure sensors respectively positioned at the upstream and downstream of the DPF in the engine performance parameters is the dew point detection completion state.
The set rotation speed range, the set oil injection amount range and the set threshold value can be set according to actual situations.
The specific process of performing dew point detection on the pressure sensors located at the upstream and downstream of the DPF is the prior art, and will not be described in detail here.
Optionally, determining whether the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state by:
and if the difference value between the engine exhaust gas volume flow after the engine exhaust gas volume flow is subjected to filtering treatment and the engine exhaust gas volume flow is smaller than a set difference threshold value, determining that the engine exhaust gas volume flow in the engine performance parameters is in a stable state.
The set difference threshold may be set according to actual situations.
Step 304, determining the upstream-downstream differential pressure of the standard DPF based on the engine exhaust gas volume flow and the set correspondence in the engine performance parameters.
In order to reduce errors, the disclosure filters the engine exhaust gas volumetric flow before step 304 to obtain a filtered engine exhaust gas volumetric flow, thereby improving the accuracy of the engine exhaust gas volumetric flow. The specific process of filtering the volumetric flow of the exhaust gas of the engine is the prior art, and will not be described in detail here.
Optionally, determining the standard DPF upstream-downstream differential pressure based on the engine exhaust gas volumetric flow and the set correspondence among the engine performance parameters includes:
and determining a standard DPF upstream-downstream pressure difference corresponding to the filtered engine exhaust gas volume flow based on the filtered engine exhaust gas volume flow and the set corresponding relation.
Step 305, determining whether to trigger DPF low temperature active regeneration based on a magnitude relationship between DPF upstream and downstream differential pressures in the engine performance parameters and the standard DPF upstream and downstream differential pressures.
In order to reduce errors, before step 305, the disclosure performs filtering treatment on the pressure difference between the upstream and downstream of the DPF to obtain the pressure difference between the upstream and downstream of the DPF after filtering, thereby improving the accuracy of the pressure difference between the upstream and downstream of the DPF. The specific process of filtering the pressure difference between the upstream and downstream of the DPF is the prior art, and will not be described in detail here.
Optionally, determining whether to trigger DPF low temperature active regeneration based on a magnitude relationship between a DPF upstream-downstream pressure difference in the engine performance parameter and the standard DPF upstream-downstream pressure difference includes:
and determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the upstream and downstream differential pressures of the DPF after filtering and the upstream and downstream differential pressures of the standard DPF.
Specifically, if the upstream-downstream differential pressure of the DPF after filtering is greater than or equal to the upstream-downstream differential pressure of the standard DPF, triggering DPF low-temperature active regeneration; and if the upstream and downstream differential pressure of the DPF after filtering is smaller than the upstream and downstream differential pressure of the standard DPF, prohibiting triggering the DPF to actively regenerate at low temperature.
Taking the setting conditions as all consideration as an example, fig. 4 is a detailed flowchart of a DPF low-temperature active regeneration control method according to an exemplary embodiment, as shown in fig. 4, including:
step 401, obtaining engine performance parameters of a vehicle;
step 402, judging whether the DPF is in an overload fault state, if so, executing step 403, otherwise, executing step 404;
step 403, triggering DPF service regeneration;
the DPF service regeneration may be, among other things, manually removing carbon particulates from the DPF, for example, by using a high pressure gas or liquid flush to remove carbon particulates from the DPF and/or using a special heating device to remove carbon particulates from the DPF.
Step 404, judging whether the engine speed is in a set speed range, if so, executing step 405, otherwise, executing step 401;
step 405, judging whether the oil injection quantity is in a set oil injection quantity range, if so, executing step 406, otherwise, executing step 401;
step 406, judging whether the volume flow of the engine exhaust gas is larger than a set threshold value, if so, executing step 407, otherwise, executing step 401;
step 407, judging whether the volume flow of the engine exhaust gas is in a stable state, if so, executing step 408, otherwise, executing step 401;
step 408, judging that the state of the pressure sensor is the dew point detection completion state, if yes, executing step 409, otherwise, executing step 401;
the pressure sensor includes a pressure sensor located upstream of the DPF and a pressure sensor located downstream of the DPF.
Step 409, performing filtering treatment on the engine exhaust gas volume flow to obtain a filtered engine exhaust gas volume flow;
step 410, determining a standard DPF upstream-downstream differential pressure corresponding to the filtered engine exhaust gas volumetric flow based on the filtered engine exhaust gas volumetric flow and the set correspondence;
step 411, performing filtering treatment on the pressure difference between the upstream and downstream of the DPF to obtain the pressure difference between the upstream and downstream of the DPF after filtering;
step 412, judging whether the upstream-downstream differential pressure of the filtered DPF is greater than or equal to the upstream-downstream differential pressure of the standard DPF, if yes, executing step 413, otherwise executing step 401;
step 413, triggering DPF low temperature active regeneration.
In some embodiments, based on the same inventive concept, the embodiments of the present disclosure further provide a DPF low-temperature active regeneration control device, and since the device is the device in the method in the embodiments of the present disclosure and the principle of the device for solving the problem is similar to that of the method, the implementation of the device may refer to the implementation of the method, and the repetition is omitted.
As shown in fig. 5, the above device includes the following modules:
an acquisition module 501 for acquiring engine performance parameters of a vehicle; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation;
a first determining module 502, configured to determine an upstream-downstream differential pressure of a standard DPF based on an engine exhaust gas volume flow and a set correspondence in the engine performance parameter if the DPF is in a non-overload fault state and the engine performance parameter meets a set condition, where the set correspondence is a correspondence between each engine exhaust gas volume flow and each standard DPF upstream-downstream differential pressure;
a second determining module 503 is configured to determine whether to trigger DPF low-temperature active regeneration based on a magnitude relationship between a DPF upstream-downstream pressure difference in the engine performance parameter and the standard DPF upstream-downstream pressure difference.
As an alternative embodiment, the first determining module 502 is configured to determine whether the DPF is in a non-overload fault state by:
if the DPF carbon loading in the engine performance parameters is smaller than the set carbon loading, determining that the DPF is in a non-overload fault state; or,
and if the upstream and downstream differential pressure of the DPF in the engine performance parameters is smaller than a set differential pressure threshold value, determining that the DPF is in a non-overload fault state.
As an alternative embodiment, the setting condition includes some or all of the following:
the engine speed in the engine performance parameters is in a set speed range;
the oil injection quantity of the oil injection device in the engine performance parameters is in a set oil injection quantity range;
the volume flow of engine exhaust gas in the engine performance parameters is greater than a set threshold;
the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state;
the state of the pressure sensors respectively positioned at the upstream and downstream of the DPF in the engine performance parameters is the dew point detection completion state.
As an alternative embodiment, the first determining module 502 is configured to determine whether the engine exhaust gas volumetric flow rate in the engine performance parameter is in a steady state by:
and if the difference value between the engine exhaust gas volume flow after the engine exhaust gas volume flow is subjected to filtering treatment and the engine exhaust gas volume flow is smaller than a set difference threshold value, determining that the engine exhaust gas volume flow in the engine performance parameters is in a stable state.
As an alternative embodiment, before determining the standard DPF upstream-downstream differential pressure, the first determining module 502 is further configured to:
filtering the engine exhaust gas volume flow to obtain filtered engine exhaust gas volume flow;
the first determining module 502 is configured to:
and determining a standard DPF upstream-downstream pressure difference corresponding to the filtered engine exhaust gas volume flow based on the filtered engine exhaust gas volume flow and the set corresponding relation.
As an alternative embodiment, before determining whether to trigger the DPF low-temperature active regeneration, the second determining module 503 is further configured to:
filtering the upstream and downstream differential pressure of the DPF to obtain the filtered upstream and downstream differential pressure of the DPF;
the second determining module 503 is configured to:
and determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the upstream and downstream differential pressures of the DPF after filtering and the upstream and downstream differential pressures of the standard DPF.
In a possible implementation manner, the second determining module 503 is configured to:
and if the upstream and downstream differential pressure of the DPF after filtering is greater than or equal to the upstream and downstream differential pressure of the standard DPF, triggering DPF low-temperature active regeneration.
In some embodiments, based on the same inventive concept, there is further provided a DPF low-temperature active regeneration control device in an embodiment of the present disclosure, which may implement the DPF low-temperature active regeneration control function discussed above, please refer to fig. 6, the device includes a processor 601 and a memory 602, wherein the memory 602 is configured to store program instructions;
the processor 601 invokes the program instructions stored in the memory by running the program instructions to implement:
acquiring engine performance parameters of a vehicle; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation;
if the DPF is in a non-overload fault state and the engine performance parameter meets a set condition, determining an upstream-downstream differential pressure of a standard DPF based on the engine exhaust gas volume flow in the engine performance parameter and a set corresponding relation, wherein the set corresponding relation is a corresponding relation between the engine exhaust gas volume flow and the upstream-downstream differential pressure of each standard DPF;
determining whether to trigger DPF low-temperature active regeneration based on a magnitude relationship between DPF upstream and downstream differential pressures in the engine performance parameters and the standard DPF upstream and downstream differential pressures.
As an alternative embodiment, it is determined whether the DPF is in a non-overload fault condition by:
if the DPF carbon loading in the engine performance parameters is smaller than the set carbon loading, determining that the DPF is in a non-overload fault state; or,
and if the upstream and downstream differential pressure of the DPF in the engine performance parameters is smaller than a set differential pressure threshold value, determining that the DPF is in a non-overload fault state.
As an alternative embodiment, the setting condition includes some or all of the following:
the engine speed in the engine performance parameters is in a set speed range;
the oil injection quantity of the oil injection device in the engine performance parameters is in a set oil injection quantity range;
the volume flow of engine exhaust gas in the engine performance parameters is greater than a set threshold;
the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state;
the state of the pressure sensors respectively positioned at the upstream and downstream of the DPF in the engine performance parameters is the dew point detection completion state.
As an alternative embodiment, it is determined whether the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state by:
and if the difference value between the engine exhaust gas volume flow after the engine exhaust gas volume flow is subjected to filtering treatment and the engine exhaust gas volume flow is smaller than a set difference threshold value, determining that the engine exhaust gas volume flow in the engine performance parameters is in a stable state.
As an alternative embodiment, the processor 601 is further configured to perform, prior to determining the standard DPF upstream-downstream differential pressure:
filtering the engine exhaust gas volume flow to obtain filtered engine exhaust gas volume flow;
determining a standard DPF upstream-downstream differential pressure based on the engine exhaust gas volume flow and a set correspondence in the engine performance parameters, comprising:
and determining a standard DPF upstream-downstream pressure difference corresponding to the filtered engine exhaust gas volume flow based on the filtered engine exhaust gas volume flow and the set corresponding relation.
As an alternative embodiment, the processor 601 is further configured to, prior to determining whether to trigger the DPF low temperature active regeneration, perform:
filtering the upstream and downstream differential pressure of the DPF to obtain the filtered upstream and downstream differential pressure of the DPF;
determining whether to trigger DPF low temperature active regeneration based on a magnitude relationship between a DPF upstream-downstream pressure difference in the engine performance parameters and the standard DPF upstream-downstream pressure difference, comprising:
and determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the upstream and downstream differential pressures of the DPF after filtering and the upstream and downstream differential pressures of the standard DPF.
As an alternative embodiment, the determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the filtered DPF upstream-downstream pressure difference and the standard DPF upstream-downstream pressure difference includes:
and if the upstream and downstream differential pressure of the DPF after filtering is greater than or equal to the upstream and downstream differential pressure of the standard DPF, triggering DPF low-temperature active regeneration.
In some possible implementations, aspects of the disclosure may also be implemented in the form of a program product 700, as shown in fig. 7, comprising computer program code which, when run on a computer, causes the computer to perform a DPF low temperature active regeneration control method as any of the preceding discussion. Because the principle of the solution of the problem of the computer program product is similar to that of the DPF low-temperature active regeneration control method, the implementation of the computer program product can refer to the implementation of the DPF low-temperature active regeneration control method, and the repetition is omitted.
It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A control method for low-temperature active regeneration of a DPF, the method comprising:
acquiring engine performance parameters of a vehicle; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation;
if the DPF is in a non-overload fault state and the engine performance parameter meets a set condition, determining an upstream-downstream differential pressure of a standard DPF based on the engine exhaust gas volume flow in the engine performance parameter and a set corresponding relation, wherein the set corresponding relation is a corresponding relation between the engine exhaust gas volume flow and the upstream-downstream differential pressure of each standard DPF;
determining whether to trigger DPF low-temperature active regeneration based on a magnitude relationship between DPF upstream and downstream differential pressures in the engine performance parameters and the standard DPF upstream and downstream differential pressures.
2. The method of claim 1, wherein determining whether the DPF is in a non-overload fault condition is performed by:
if the DPF carbon loading in the engine performance parameters is smaller than the set carbon loading, determining that the DPF is in a non-overload fault state; or,
and if the upstream and downstream differential pressure of the DPF in the engine performance parameters is smaller than a set differential pressure threshold value, determining that the DPF is in a non-overload fault state.
3. The method of claim 1, wherein the set conditions include some or all of the following:
the engine speed in the engine performance parameters is in a set speed range;
the oil injection quantity of the oil injection device in the engine performance parameters is in a set oil injection quantity range;
the volume flow of engine exhaust gas in the engine performance parameters is greater than a set threshold;
the engine exhaust gas volumetric flow in the engine performance parameter is in a steady state;
the state of the pressure sensors respectively positioned at the upstream and downstream of the DPF in the engine performance parameters is the dew point detection completion state.
4. A method according to claim 3, characterized in that it is determined whether the engine exhaust gas volume flow in the engine performance parameter is in a steady state or not by:
and if the difference value between the engine exhaust gas volume flow after the engine exhaust gas volume flow is subjected to filtering treatment and the engine exhaust gas volume flow is smaller than a set difference threshold value, determining that the engine exhaust gas volume flow in the engine performance parameters is in a stable state.
5. The method of claim 1, further comprising, prior to determining the standard DPF upstream-downstream differential pressure:
filtering the engine exhaust gas volume flow to obtain filtered engine exhaust gas volume flow;
determining a standard DPF upstream-downstream differential pressure based on the engine exhaust gas volume flow and a set correspondence in the engine performance parameters, comprising:
and determining a standard DPF upstream-downstream pressure difference corresponding to the filtered engine exhaust gas volume flow based on the filtered engine exhaust gas volume flow and the set corresponding relation.
6. The method of claim 1, further comprising, prior to determining whether to trigger the DPF low temperature active regeneration:
filtering the upstream and downstream differential pressure of the DPF to obtain the filtered upstream and downstream differential pressure of the DPF;
determining whether to trigger DPF low temperature active regeneration based on a magnitude relationship between a DPF upstream-downstream pressure difference in the engine performance parameters and the standard DPF upstream-downstream pressure difference, comprising:
and determining whether to trigger DPF low-temperature active regeneration based on the magnitude relation between the upstream and downstream differential pressures of the DPF after filtering and the upstream and downstream differential pressures of the standard DPF.
7. The method of claim 6, wherein the determining whether to trigger DPF low temperature active regeneration based on a magnitude relationship between the filtered DPF upstream-downstream pressure differential and the standard DPF upstream-downstream pressure differential comprises:
and if the upstream and downstream differential pressure of the DPF after filtering is greater than or equal to the upstream and downstream differential pressure of the standard DPF, triggering DPF low-temperature active regeneration.
8. A DPF low-temperature active regeneration control device, characterized in that the device comprises:
the acquisition module is used for acquiring engine performance parameters of the vehicle; wherein the engine performance parameter includes a characteristic for characterizing a performance state during engine operation;
the first determining module is used for determining the upstream and downstream differential pressures of the standard DPF based on the engine exhaust gas volume flow and a set corresponding relation in the engine performance parameters if the DPF is in a non-overload fault state and the engine performance parameters meet set conditions, wherein the set corresponding relation is the corresponding relation between the engine exhaust gas volume flow and the upstream and downstream differential pressures of the standard DPF;
and the second determining module is used for determining whether to trigger DPF low-temperature active regeneration or not based on the magnitude relation between the DPF upstream and downstream pressure difference in the engine performance parameters and the standard DPF upstream and downstream pressure difference.
9. An apparatus, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor implements the steps of the method of any one of claims 1 to 7 by executing the executable instructions.
10. A computer readable and writable storage medium, on which computer instructions are stored which when executed by a processor implement the steps of the method of any one of claims 1 to 7.
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| CN202311283911.5A CN117167123A (en) | 2023-09-28 | 2023-09-28 | DPF low-temperature active regeneration control method, device and equipment |
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| CN202311283911.5A CN117167123A (en) | 2023-09-28 | 2023-09-28 | DPF low-temperature active regeneration control method, device and equipment |
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