CN114645794A - Exhaust aftertreatment control method and device and terminal equipment - Google Patents

Exhaust aftertreatment control method and device and terminal equipment Download PDF

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Publication number
CN114645794A
CN114645794A CN202110454137.4A CN202110454137A CN114645794A CN 114645794 A CN114645794 A CN 114645794A CN 202110454137 A CN202110454137 A CN 202110454137A CN 114645794 A CN114645794 A CN 114645794A
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engine
temperature
lnt
value
exhaust aftertreatment
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CN202110454137.4A
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Chinese (zh)
Inventor
刘世龙
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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Priority to CN202110454137.4A priority Critical patent/CN114645794A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/0255—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus to accelerate the warming-up of the exhaust gas treating apparatus at engine start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F02D41/405—Multiple injections with post injections

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention is suitable for the technical field of vehicles and discloses an exhaust aftertreatment control method, an exhaust aftertreatment control device and terminal equipment, wherein the method comprises the following steps: acquiring a temperature parameter value of an engine; if the temperature parameter value of the engine meets a preset condition, entering an LNT heating mode; in the LNT warming-up mode, combustion parameters of the engine are adjusted to increase LNT bed temperature. According to the invention, under the LNT heating mode, the combustion parameters of the engine can be adjusted, the LNT bed temperature is increased by adjusting the combustion parameters of the transmitter, and further the LNT carrier temperature is increased, so that the LNT carrier temperature can be increased even if a vehicle is under working conditions such as cold start, and the like, and further the NO is increasedxThe conversion efficiency of (c).

Description

Exhaust aftertreatment control method and device and terminal equipment
Technical Field
The invention belongs to the technical field of vehicles, and particularly relates to an exhaust aftertreatment control method, an exhaust aftertreatment control device and terminal equipment.
Background
The lean-burn technology is a key technology for realizing energy conservation and emission reduction of the diesel engine, can obviously improve the cycle thermal efficiency of the diesel engine, and can effectively control the emission of CO and HC. In addition, NOxAdsorption reduction catalysis technology LNT (lean-NO)xtrap, lean NOxTrapping) to solve the problem of NO in diesel enginesxOne of the effective post-treatment technical means of the emission. LNT technology realizes NO conversion through periodic lean and rich combustion conversion of enginexAdsorption and reduction of (3).
When a diesel engine is equipped with an LNT catalyst, the diesel engine is operated in a lean burn state, with NO being emittedxIs catalyzed by LNT and treated with sodium nitrateThe acid salt form is adsorbed and stored, and in a lean combustion state for a long time, due to the limited adsorption capacity of the catalyst, when the adsorption is close to saturation, the diesel engine needs to be switched to a rich combustion reduction state for a short time, and nitrate stored in the LNT catalyst is desorbed by a reduction substance generated by the rich combustion and nitrogen oxide is reduced into harmless nitrogen.
In LNT technology, NOxThe conversion efficiency of (a) is directly related to the LNT carrier temperature, and higher conversion efficiency is only obtained when the carrier temperature is within a certain temperature range. However, during cold start conditions, the LNT carrier temperature is low, resulting in NOxThe conversion efficiency of (a) is low.
Disclosure of Invention
In view of this, embodiments of the present invention provide an exhaust aftertreatment control method, apparatus and terminal device to solve the problem of NO caused by low LNT carrier temperature under the working conditions of cold start and the like in the prior artxThe conversion efficiency of (2) is low.
A first aspect of an embodiment of the present invention provides an exhaust aftertreatment control method, including:
acquiring a temperature parameter value of an engine;
if the temperature parameter value of the engine meets a preset condition, entering an LNT heating mode;
in the LNT warming-up mode, combustion parameters of the engine are adjusted to increase LNT bed temperature.
A second aspect of an embodiment of the present invention provides an exhaust aftertreatment control device, including:
the acquisition module is used for acquiring a temperature parameter value of the engine;
the judgment module is used for entering an LNT heating mode if the temperature parameter value of the engine meets a preset condition;
and the adjusting module is used for adjusting the combustion parameters of the engine under the LNT heating mode so as to improve the bed temperature of the LNT.
A third aspect of embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the exhaust gas aftertreatment control method according to the first aspect when executing the computer program.
A fourth aspect of embodiments of the invention provides a computer readable storage medium storing a computer program which, when executed by one or more processors, carries out the steps of the exhaust aftertreatment control method according to the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: according to the embodiment of the invention, when the temperature parameter value of the engine meets the preset condition, the LNT heating mode is entered, the combustion parameter of the engine can be adjusted in the LNT heating mode, the LNT bed temperature is raised by adjusting the combustion parameter of the transmitter, and then the LNT carrier temperature is raised, so that the LNT carrier temperature can be raised even if the vehicle is under the working conditions of cold start and the like, and further the NO is raisedxThe conversion efficiency of (a).
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart illustrating an implementation of an exhaust aftertreatment control method according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating an LNT bed temperature ramp-up after entering an LNT warm-up mode, according to an embodiment of the invention;
FIG. 3 shows NO after LNT warm-up mode is entered according to an embodiment of the inventionxA reduction scheme;
FIG. 4 is a schematic block diagram of an exhaust aftertreatment control arrangement provided in accordance with an embodiment of the invention;
fig. 5 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of an implementation of an exhaust aftertreatment control method according to an embodiment of the invention, and for convenience of description, only the parts related to the embodiment of the invention are shown. The execution main body of the embodiment of the present invention may be a terminal device, wherein the terminal device may be an ECU (Electronic Control Unit), i.e., a vehicle-mounted computer.
As shown in fig. 1, the exhaust aftertreatment control method may include the steps of:
s101: a temperature parameter value of the engine is obtained.
Wherein the engine may be a diesel engine.
The gas emitted by the diesel engine can be treated by an LNT catalyst to reduce NOxThe content of (a).
In the embodiment of the invention, the temperature parameter value of the engine is firstly obtained.
S102: and if the temperature parameter value of the engine meets a preset condition, entering an LNT heating mode.
In the embodiment of the invention, if the temperature parameter value of the engine does not meet the preset condition, the LNT heating mode is not entered, and the existing mode is kept unchanged.
Wherein, LNT intensification mode compares with normal mode, under LNT intensification mode, can adjust the combustion parameter of engine to promote the exhaust temperature of engine, and then promote LNT bed temperature. The LNT bed temperature is the temperature of the catalytic bed of the LNT.
In one embodiment of the invention, the temperature parameter values of the engine comprise an air inlet temperature value of the engine and a water temperature value of the engine;
the temperature parameter value of the engine meets the preset condition, and the temperature parameter value comprises the following steps:
the air inlet temperature value of the engine is within a first preset temperature range, and the water temperature value of the engine is within a second preset temperature range.
In one embodiment of the present invention, the first predetermined temperature range is-30 ℃ to 30 ℃ and the second predetermined temperature range is 0 ℃ to 60 ℃.
The first preset temperature range and the second preset temperature range may be set according to actual needs, and this is only one practical way.
In the embodiment of the invention, if the intake air temperature value of the engine is in a first preset temperature range and the water temperature value of the engine is in a second preset temperature range, the heating mode of the LNT is activated, and the LNT heating mode is entered; if the air inlet temperature value of the engine is not in the first preset temperature range or the water temperature value of the engine is not in the second preset temperature range, the engine still works in the normal mode.
In one embodiment of the invention, the temperature parameter value of the engine further comprises an exhaust gas temperature value of the engine;
the temperature parameter value of the engine meets the preset condition, and the method further comprises the following steps:
the exhaust temperature value of the engine is within a third predetermined temperature range.
In one embodiment of the present invention, the third predetermined temperature range is 50 ℃ to 160 ℃.
The third preset temperature range may be set according to actual needs, and this is only an implementable manner.
In the embodiment of the invention, if the intake air temperature value of the engine is within a first preset temperature range, the water temperature value of the engine is within a second preset temperature range, and the exhaust air temperature value of the engine is within a third preset temperature range, the LNT heating mode is activated, and the LNT heating mode is entered. And if the recent temperature value of the engine is not in the first preset temperature range, or the water temperature value of the engine is not in the second preset temperature range, or the exhaust temperature value of the engine is not in the third preset temperature range, the engine still works in the normal mode.
S103: in the LNT warming-up mode, combustion parameters of the engine are adjusted to increase LNT bed temperature.
In the embodiment of the invention, in the LNT heating mode, the exhaust temperature of the engine can be increased by adjusting the combustion parameters of the engine, and further the bed temperature of the LNT can be increased, so that the LNT carrier is in the preset temperature range. Wherein NO is present in the LNT carrier within a predetermined temperature rangexThe conversion efficiency is highest or higher.
In one embodiment of the invention, the combustion parameters include the amount of post-injection and the advance angle of injection;
adjusting a combustion parameter of an engine, comprising:
increasing the amount of post-injection oil to the engine, and/or,
and pushing the fuel injection advance angle of the engine.
In the embodiment of the invention, the exhaust temperature of the engine can be improved by improving the post-injection oil quantity of the engine and/or pushing the injection advance angle of the post-injection engine, so that the LNT bed temperature can be improved. The lift value of the post-injection oil quantity and/or the retarded angle of the injection advance angle can be determined according to the target value of the exhaust temperature of the engine.
As can be seen from the above description, in the embodiment of the present invention, when the temperature parameter value of the engine satisfies the preset condition, the LNT warming mode is entered, in the LNT warming mode, the combustion parameter of the engine may be adjusted, and the combustion parameter of the transmitter may be adjusted to increase the LNT bed temperature, so as to increase the LNT carrier temperature, so that the LNT carrier temperature may be increased even under the working conditions such as cold start of the vehicle, so as to increase the NOxReduction of NO in exhaust gasxAnd (4) content.
The LNT bed temperature adjusting strategy of the embodiment of the invention is highly intelligent, and can improve the temperature of the exhaust pipeline through the accurate identification of the inlet air temperature, the water temperature and the engine exhaust temperature, so that the LNT starts to adjust NO as soon as possiblexThereby reducing NO in the exhaustxContent (c); book (I)The embodiment of the invention does not need to be provided with additional hardware, has low cost and is easy to popularize; the values of all temperature ranges can be flexibly configured, can be changed along with different working conditions of the whole vehicle, and has openness and flexibility.
Referring to fig. 2, LNT bed temperature was 223 ℃ throughout WLTC (world modified Light Vehicles Test Cycle) emissions Cycle, second vehicle speed phase start, no ramp-up mode; after the heating mode is realized, the bed temperature of the LNT is 320 ℃, and the temperature is increased by 97 ℃.
Referring to fig. 3, the LNT conversion efficiency is greatly improved, and WLTC discharges cyclic transient nitrogen oxide NOxThe original 53ppm is reduced to 4 ppm.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In accordance with the exhaust aftertreatment control method, an embodiment of the present invention also provides an exhaust aftertreatment control device having the same advantageous effects as the exhaust aftertreatment control method. Fig. 4 is a schematic block diagram of an exhaust aftertreatment control device according to an embodiment of the invention, and for convenience of explanation, only the portions related to the embodiment of the invention are shown.
In an embodiment of the present invention, the exhaust aftertreatment control device 30 may include an acquisition module 301, a determination module 302, and an adjustment module 303.
The acquiring module 301 is used for acquiring a temperature parameter value of the engine;
a determining module 302, configured to enter an LNT heating mode if a temperature parameter value of an engine meets a preset condition;
and the adjusting module 303 is configured to adjust a combustion parameter of the engine in the LNT warming mode to increase a bed temperature of the LNT.
Optionally, in the determination module 302, the temperature parameter value of the engine includes an intake air temperature value of the engine and a water temperature value of the engine;
the temperature parameter value of the engine meets the preset condition, and the temperature parameter value comprises the following steps:
the air inlet temperature value of the engine is within a first preset temperature range, and the water temperature value of the engine is within a second preset temperature range.
Optionally, in the determination module 302, the temperature parameter value of the engine further includes an exhaust temperature value of the engine;
the temperature parameter value of the engine meets the preset condition, and the method further comprises the following steps:
the exhaust temperature value of the engine is within a third predetermined temperature range.
Optionally, in the determining module 302, the third preset temperature range is 50 ℃ to 160 ℃.
Optionally, in the determining module 302, the first preset temperature range is-30 ℃ to 30 ℃, and the second preset temperature range is 0 ℃ to 60 ℃.
Optionally, the combustion parameters include a post-injection amount and an injection advance angle;
the adjustment module 303 may also be configured to:
increasing the amount of post-injection oil to the engine, and/or,
and pushing the fuel injection advance angle of the engine.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing functional units and modules are merely illustrated as examples, and in practical applications, the foregoing functional allocation may be performed by different functional units and modules as needed, that is, the internal structure of the exhaust aftertreatment control device is divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Fig. 5 is a schematic block diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 5, the terminal device 40 of this embodiment includes: one or more processors 401, a memory 402, and a computer program 403 stored in the memory 402 and operable on the processors 401. The processor 401, when executing the computer program 403, implements the steps in the various exhaust aftertreatment control method embodiments described above, such as steps S101 to S103 shown in fig. 1. Alternatively, the processor 401, when executing the computer program 403, implements the functions of the various modules/units in the above-described exhaust aftertreatment control device embodiment, such as the functions of the modules 301 to 303 shown in fig. 4.
Illustratively, the computer program 403 may be partitioned into one or more modules/units that are stored in the memory 402 and executed by the processor 401 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used for describing the execution process of the computer program 403 in the terminal device 40. For example, the computer program 403 may be divided into an acquisition module, a judgment module and an adjustment module, and each module has the following specific functions:
the acquisition module is used for acquiring a temperature parameter value of the engine;
the judgment module is used for entering an LNT heating mode if the temperature parameter value of the engine meets a preset condition;
and the adjusting module is used for adjusting the combustion parameters of the engine under the LNT heating mode so as to improve the bed temperature of the LNT.
Other modules or units can refer to the description of the embodiment shown in fig. 4, and are not described again here.
The terminal device 40 may be an ECU, or may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device 40 includes, but is not limited to, a processor 401 and a memory 402. Those skilled in the art will appreciate that fig. 5 is only one example of a terminal device 40, and does not constitute a limitation to the terminal device 40, and may include more or less components than those shown, or combine some components, or different components, for example, the terminal device 40 may further include an input device, an output device, a network access device, a bus, etc.
The Processor 401 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 402 may be an internal storage unit of the terminal device 40, such as a hard disk or a memory of the terminal device 40. The memory 402 may also be an external storage device of the terminal device 40, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 40. Further, the memory 402 may also include both an internal storage unit of the terminal device 40 and an external storage device. The memory 402 is used for storing the computer program 403 and other programs and data required by the terminal device 40. The memory 402 may also be used to temporarily store data that has been output or is to be output.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided herein, it should be understood that the disclosed exhaust aftertreatment control apparatus and method may be implemented in other ways. For example, the exhaust aftertreatment control device embodiments described above are merely illustrative, and for example, the division of the modules or units is merely a logical division of functions, and other divisions may be implemented in practice, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. An exhaust aftertreatment control method, comprising:
acquiring a temperature parameter value of an engine;
if the temperature parameter value of the engine meets a preset condition, entering an LNT heating mode;
and in the LNT warming-up mode, adjusting combustion parameters of the engine to increase the LNT bed temperature.
2. The exhaust aftertreatment control method of claim 1, wherein the temperature parameter value of the engine includes an intake air temperature value of the engine and a water temperature value of the engine;
the temperature parameter value of the engine meets a preset condition, and the method comprises the following steps:
the air inlet temperature value of the engine is within a first preset temperature range, and the water temperature value of the engine is within a second preset temperature range.
3. The exhaust aftertreatment control method of claim 2, wherein the temperature parameter value of the engine further comprises an exhaust temperature value of the engine;
the temperature parameter value of the engine meets the preset condition, and the method further comprises the following steps:
the exhaust temperature value of the engine is within a third predetermined temperature range.
4. The exhaust aftertreatment control method of claim 3, wherein the third preset temperature range is 50 ℃ to 160 ℃.
5. The exhaust aftertreatment control method of claim 2, wherein the first predetermined temperature range is-30 ℃ to 30 ℃ and the second predetermined temperature range is 0 ℃ to 60 ℃.
6. The exhaust aftertreatment control method according to any one of claims 1 to 5, wherein the combustion parameter includes an amount of post-injection oil and an injection advance angle;
the adjusting a combustion parameter of the engine includes:
increasing the post injection amount of the engine, and/or,
and pushing back the fuel injection advance angle of the engine.
7. An exhaust aftertreatment control device, comprising:
the acquisition module is used for acquiring a temperature parameter value of the engine;
the judgment module is used for entering an LNT heating mode if the temperature parameter value of the engine meets a preset condition;
and the adjusting module is used for adjusting the combustion parameters of the engine under the LNT heating mode so as to improve the bed temperature of the LNT.
8. The exhaust aftertreatment control device of claim 7, wherein in the determination module, the temperature parameter value of the engine comprises an intake air temperature value of the engine and a water temperature value of the engine;
the temperature parameter value of the engine meets a preset condition, and the method comprises the following steps:
the air inlet temperature value of the engine is within a first preset temperature range, and the water temperature value of the engine is within a second preset temperature range.
9. Terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor realizes the steps of the exhaust gas aftertreatment control method according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by one or more processors, carries out the steps of the exhaust aftertreatment control method according to any one of claims 1 to 6.
CN202110454137.4A 2021-04-26 2021-04-26 Exhaust aftertreatment control method and device and terminal equipment Pending CN114645794A (en)

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