CN110578607A - exhaust temperature thermal management method and apparatus - Google Patents

exhaust temperature thermal management method and apparatus Download PDF

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Publication number
CN110578607A
CN110578607A CN201910884698.0A CN201910884698A CN110578607A CN 110578607 A CN110578607 A CN 110578607A CN 201910884698 A CN201910884698 A CN 201910884698A CN 110578607 A CN110578607 A CN 110578607A
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CN
China
Prior art keywords
engine
temperature
mode
preset
aftertreatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910884698.0A
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Chinese (zh)
Inventor
侯健鹏
刘帅
姚泽光
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Filing date
Publication date
Application filed by Weichai Power Co Ltd filed Critical Weichai Power Co Ltd
Priority to CN201910884698.0A priority Critical patent/CN110578607A/en
Publication of CN110578607A publication Critical patent/CN110578607A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed

Abstract

The embodiment of the invention provides an exhaust temperature heat management method and equipment, wherein the method comprises the following steps: acquiring the accelerator opening of an engine, the aftertreatment temperature of an SCR system, the engine speed and the engine working mode; when the throttle opening is detected to be smaller than or equal to a preset opening threshold value, the aftertreatment temperature is detected to be smaller than or equal to a preset temperature lower limit value, the engine rotating speed is within a preset rotating speed threshold value range, and the engine working mode is in a preset mode, the exhaust butterfly valve is controlled to suppress air to improve the exhaust temperature, the exhaust temperature can be still guaranteed to be at the temperature required by aftertreatment when the vehicle speed is slow, the throttle is low, the engine returns to an idle speed, and the engine load is low, so that the temperature of an aftertreatment carrier is increased, better oxidation is realized, nitrogen oxides in tail gas are effectively reduced, the generation of carbon particles is reduced, and the carbon deposition amount of the DPF is reduced.

Description

Exhaust temperature thermal management method and apparatus
Technical Field
the embodiment of the invention relates to the technical field of engines, in particular to an exhaust temperature thermal management method and equipment.
background
along with the stricter national regulations, the emission level of the whole vehicle is improved, the drainage level grade of the diesel engine is gradually improved, the requirement on the exhaust management capability of the whole vehicle is more and more strict, and the generation of pollutants in tail gas can be greatly reduced by improving the exhaust heat management capability of the engine.
in the existing electric control engine, the heat management is generally carried out by air holding through an air inlet throttle valve, so that the air quantity entering a cylinder is reduced, and the exhaust temperature of the engine is improved; when the exhaust temperature is raised, the problem of an aftertreatment carrier is improved, so that the reduction capability of aftertreatment is promoted, and the nitrogen oxide in the tail gas is reduced.
However, in the actual running process of the whole vehicle, especially a light vehicle, often runs under urban working conditions, because the vehicle speed is slow, the accelerator is low, the engine often returns to idle speed, the engine load is low, the exhaust temperature is still low only by the air intake throttle valve, so that the temperature of the aftertreatment carrier cannot be continuously raised, even the lower exhaust flows through the aftertreatment, the aftertreatment can be cooled, the aftertreatment temperature is low, the better oxidation cannot be realized, the nitrogen oxide in the exhaust cannot be effectively reduced, the passive regeneration of carbon particles is not facilitated, and the carbon deposition of a particle trap (Diesel Particulate Filter, DPF for short) can be increased.
Disclosure of Invention
the embodiment of the invention provides an exhaust temperature thermal management method and equipment, which aim to solve the problems that an engine often returns to an idle speed due to slow speed and low throttle, the load of the engine is low, and the exhaust temperature is still low only through an air inlet throttle valve.
In a first aspect, an embodiment of the present invention provides an exhaust temperature thermal management method, including:
Acquiring the accelerator opening of an engine, the aftertreatment temperature of a Selective Catalytic Reduction (SCR) system, the engine speed and the engine working mode;
and when detecting that the accelerator opening is smaller than or equal to a preset opening threshold, the aftertreatment temperature is smaller than or equal to a preset temperature lower limit value, the engine speed is within a preset speed threshold range value and the engine working mode is in a preset mode, controlling an exhaust butterfly valve to hold air so as to improve the exhaust temperature.
in one possible design, the preset mode is a scream mode or a Normal mode.
in one possible design, the obtaining of the throttle opening of the engine, the aftertreatment temperature of the SCR system, the engine speed, and the engine operating mode includes:
Receiving an accelerator opening sent by an accelerator opening sensor of an engine;
Receiving a post-processing temperature sent by a temperature sensor of the SCR system;
Receiving the engine speed sent by an engine speed sensor;
And acquiring the working state of the engine and/or the working state of the SCR system, and determining the working mode of the engine.
In one possible design, the obtaining the operating state of the engine and/or the operating state of the SCR system and determining the engine operating mode includes:
When the working condition of the engine is detected to enter an idling process from ignition, determining that the engine is in a starting mode;
When the engine is detected to be in a normal running working condition and the aftertreatment temperature of the SCR system is smaller than the preset temperature lower limit value, determining that the engine is in an SCREAT mode;
when the detected aftertreatment temperature is larger than the preset temperature lower limit value, determining that the engine is in a Normal mode;
When it is detected that the particulate matter in the particulate trap DPF is full, the engine is determined to be in a regeneration mode.
in one possible design, the preset opening threshold is 0.
In a second aspect, an embodiment of the present invention provides an exhaust temperature thermal management apparatus, including:
The parameter acquisition module is used for acquiring the accelerator opening of the engine, the aftertreatment temperature of the Selective Catalytic Reduction (SCR) system, the engine rotating speed and the engine working mode;
And the exhaust butterfly valve control module is used for controlling the exhaust butterfly valve to hold air so as to improve the exhaust temperature when detecting that the accelerator opening is smaller than or equal to a preset opening threshold value, the aftertreatment temperature is smaller than or equal to a preset temperature lower limit value, the engine speed is within a preset speed threshold value range value and the engine working mode is in a preset mode.
In one possible design, the parameter obtaining module includes:
The first parameter acquisition unit is used for receiving the accelerator opening degree sent by an accelerator opening degree sensor of the engine;
The second parameter acquisition unit is used for receiving the post-processing temperature sent by the temperature sensor of the SCR system;
the third parameter acquisition unit is used for receiving the engine rotating speed sent by the engine rotating speed sensor;
and the working mode determining unit is used for acquiring the working state of the engine and/or the working state of the SCR system and determining the working mode of the engine.
in a possible design, the operation mode determination unit is specifically configured to determine that the engine is in a start mode when an engine operation condition is detected as entering an idle process from ignition;
When the engine is detected to be in a normal running working condition and the aftertreatment temperature of the SCR system is smaller than the preset temperature lower limit value, determining that the engine is in an SCREAT mode;
when the detected aftertreatment temperature is larger than the preset temperature lower limit value, determining that the engine is in a Normal mode;
when it is detected that the particulate matter in the particulate trap DPF is full, the engine is determined to be in a regeneration mode.
In a third aspect, an embodiment of the present invention provides an exhaust temperature thermal management apparatus, including: at least one processor and memory;
the memory stores computer-executable instructions;
The at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the exhaust temperature thermal management method as set forth above in the first aspect and in various possible designs of the first aspect.
In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium, in which computer-executable instructions are stored, and when a processor executes the computer-executable instructions, the method for managing exhaust temperature heat according to the first aspect and various possible designs of the first aspect is implemented.
according to the exhaust temperature heat management method and the device provided by the embodiment of the invention, the throttle opening of the engine, the aftertreatment temperature of the Selective Catalytic Reduction (SCR) system, the engine speed and the engine working mode are obtained; when the throttle opening is detected to be smaller than or equal to a preset opening threshold value, the aftertreatment temperature is detected to be smaller than or equal to a preset temperature lower limit value, the engine rotating speed is within a preset rotating speed threshold value range, and the engine working mode is in a preset mode, the exhaust butterfly valve is controlled to suppress air to improve the exhaust temperature, the exhaust temperature can be still guaranteed to be at the temperature required by aftertreatment when the vehicle speed is slow, the throttle is low, the engine returns to an idle speed, and the engine load is low, so that the temperature of an aftertreatment carrier is increased, better oxidation is realized, nitrogen oxides in tail gas are effectively reduced, the generation of carbon particles is reduced, and the carbon deposition amount of the DPF is reduced.
drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an electronically controlled engine system according to an embodiment of the present invention;
FIG. 2 is a first flowchart illustrating a method for thermal management of exhaust temperature according to an embodiment of the present invention;
FIG. 3 is a second flowchart illustrating a method for thermal management of exhaust temperature according to an embodiment of the present invention;
FIG. 4 is a first schematic structural diagram of an exhaust temperature thermal management apparatus according to an embodiment of the present invention;
Fig. 5 is a schematic structural diagram ii of an exhaust temperature thermal management apparatus according to an embodiment of the present invention;
Fig. 6 is a schematic hardware structure diagram of an exhaust temperature thermal management device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an electronically controlled engine system according to an embodiment of the present invention. As shown in fig. 1, the system provided by the present embodiment includes: an engine 100, an Electronic Control Unit (ECU) 200, and a Selective Catalytic Reduction (SCR) system 300.
Among them, the engine 100 is an electronic control engine, and an electronic control system performs various control functions.
An SCR system: the method is a treatment process aiming at NOx in tail gas emission of diesel vehicles, namely, under the action of a catalyst, a reducing agent ammonia or urea is sprayed to reduce the NOx in the tail gas into N2and H2O。
an accelerator opening sensor is arranged on the engine 100 and used for measuring the accelerator opening of the engine; and the SCR system is provided with a temperature sensor for measuring the aftertreatment temperature of the SCR system.
The SCR system also has a Particulate trap (DPF), a ceramic Filter, which traps Particulate emissions before they enter the atmosphere.
fig. 2 is a first flowchart of a method for managing heat of exhaust gas temperature according to an embodiment of the present invention, where an executing body of the embodiment may be an ECU in the embodiment shown in fig. 1, and the embodiment is not limited in particular here.
as shown in fig. 2, the method includes:
S201: and acquiring the accelerator opening of the engine, the aftertreatment temperature of the SCR system, the engine rotating speed and the engine working mode.
In the present embodiment, the accelerator opening of the engine refers to the throttle opening, the throttle opening is controlled by the accelerator pedal, and the engine controls the amount of fuel injection according to the throttle opening.
the aftertreatment temperature of the SCR system can be the upstream temperature of the SCR system, a temperature sensor is arranged at the upstream of the SCR system, and the aftertreatment temperature of the SCR system can be obtained by receiving the aftertreatment temperature sent by the temperature sensor of the SCR system.
specifically, the accelerator opening degree sent by an accelerator opening degree sensor of the engine can be received; receiving a post-processing temperature sent by a temperature sensor of the SCR system; receiving the engine speed sent by an engine speed sensor; and acquiring the working state of the engine and/or the working state of the SCR system, and determining the working mode of the engine.
In this embodiment, the operating mode of the engine may be determined by obtaining the operating condition of the engine and the operating condition of the SCR system, and according to the operating condition of the engine and the operating condition of the SCR system.
S202: and when detecting that the accelerator opening is smaller than or equal to a preset opening threshold, the aftertreatment temperature is smaller than or equal to a preset temperature lower limit value, the engine speed is within a preset speed threshold range value and the engine working mode is in a preset mode, controlling an exhaust butterfly valve to hold air so as to improve the exhaust temperature.
In the present embodiment, the range of the accelerator opening degree is 0 to 100%. The preset opening degree threshold value can be calibrated according to actual conditions, and the size of the preset opening degree threshold value is not limited at all.
In an embodiment of the present invention, optionally, the preset opening threshold is 0. When the opening of the accelerator is larger than 0, the exhaust butterfly valve is withdrawn for holding air, so that the situation that the back pressure is too high and the power performance of the whole vehicle is influenced is prevented.
In this embodiment, the engine speed being within the preset speed threshold range means that the engine speed is greater than the first set speed and less than the second set speed. Wherein first rotational speed and the second rotational speed of setting for can set up according to the rotational speed condition of engine, and its purpose is too high for preventing that the exhaust butterfly valve from breathing out the exhaust backpressure, causes the engine to stall or rotational speed to descend and hang down excessively, and the first rotational speed of setting for and the second rotational speed of setting for have certain buffer interval simultaneously and prevent the exhaust butterfly valve frequent operation that the engine rotational speed fluctuation caused, the unstable problem of engine rotational speed.
in the present embodiment, the default mode is the SCRHAET mode or the Normal mode. And when the engine is detected to be in a normal running working condition and the aftertreatment temperature of the SCR system is smaller than the preset temperature lower limit value, determining that the engine is in the SCREAT mode. And when the detected aftertreatment temperature is greater than the preset lower temperature limit value, determining that the engine is in a Normal mode.
From the above description, the throttle opening of the engine, the aftertreatment temperature of the Selective Catalytic Reduction (SCR) system, the engine speed and the engine working mode are obtained; when the throttle opening is detected to be smaller than or equal to a preset opening threshold value, the aftertreatment temperature is detected to be smaller than or equal to a preset temperature lower limit value, the engine rotating speed is within a preset rotating speed threshold value range, and the engine working mode is in a preset mode, the exhaust butterfly valve is controlled to suppress air to improve the exhaust temperature, the exhaust temperature can be still guaranteed to be at the temperature required by aftertreatment when the vehicle speed is slow, the throttle is low, the engine returns to an idle speed, and the engine load is low, so that the temperature of an aftertreatment carrier is increased, better oxidation is realized, nitrogen oxides in tail gas are effectively reduced, the generation of carbon particles is reduced, and the carbon deposition amount of the DPF is reduced.
referring to fig. 3, fig. 3 is a second flowchart of a method for managing exhaust temperature thermally according to an embodiment of the present invention, and on the basis of the embodiment of fig. 2, this embodiment mainly describes specific processes of obtaining an operating state of an engine and/or an operating state of an SCR system and determining an operating mode of the engine:
S301: when the working condition of the engine is detected to enter an idling process from ignition, determining that the engine is in a starting mode;
s302: when the engine is detected to be in a normal running working condition and the aftertreatment temperature of the SCR system is smaller than the preset temperature lower limit value, determining that the engine is in an SCREAT mode;
S303: when the detected aftertreatment temperature is larger than the preset temperature lower limit value, determining that the engine is in a Normal mode;
S304: when it is detected that the particulate matter in the particulate trap DPF is full, the engine is determined to be in a regeneration mode.
In the present embodiment, the normal driving condition refers to a normal driving condition of the whole vehicle, i.e., normal road driving.
The SCRHAT mode refers to normal operation of an engine, and is not beneficial to the catalytic reaction of nitrogen and oxygen because the upstream temperature of the SCR is smaller than a certain temperature threshold value, and the upstream temperature of the SCR needs to be increased in a gas holding mode and the like, so that the catalytic reaction rate of the nitrogen and oxygen is accelerated.
and the Normal mode means that the aftertreatment temperature of the SCR system is greater than a preset temperature lower limit value, and after the nitrogen-oxygen catalysis requirement is met, heat management is performed to raise the exhaust temperature in modes of continuing to hold air and the like.
The regeneration mode refers to a mode in which the DPF becomes clogged due to the accumulation of particulate matter trapped in the DPF, and therefore, the DPF filled with particulate matter needs to be periodically regenerated to recover the filtering function thereof.
Fig. 4 is a first schematic structural diagram of an exhaust temperature thermal management device according to an embodiment of the present invention. As shown in fig. 4, the exhaust temperature thermal management apparatus 40 includes: a parameter acquisition module 401 and a bleed butterfly valve control module 402.
The parameter acquisition module 401 is used for acquiring the accelerator opening of the engine, the aftertreatment temperature of the selective catalytic reduction SCR system, the engine speed and the engine working mode;
And the exhaust butterfly valve control module 402 is used for controlling an exhaust butterfly valve to hold back air to improve the exhaust temperature when detecting that the accelerator opening is smaller than or equal to a preset opening threshold, the aftertreatment temperature is smaller than or equal to a preset temperature lower limit value, the engine speed is within a preset speed threshold range value and the engine working mode is in a preset mode.
The device provided in this embodiment may be used to implement the technical solution of the above method embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
in one embodiment of the present invention, the preset mode is a SCRHAT mode or a Normal mode.
fig. 5 is a schematic structural diagram of an exhaust temperature thermal management device according to an embodiment of the present invention. As shown in fig. 5, in this embodiment, on the basis of the embodiment in fig. 4, the parameter obtaining module 401 includes:
the first parameter obtaining unit 4011 is configured to receive an accelerator opening degree sent by an accelerator opening degree sensor of an engine;
the second parameter obtaining unit 4012 is configured to receive the post-processing temperature sent by the temperature sensor of the SCR system;
The third parameter obtaining unit 4013 is configured to receive the engine speed sent by the engine speed sensor;
and the working mode determining unit 4014 is configured to obtain a working state of the engine and/or a working state of the SCR system, and determine a working mode of the engine.
in an embodiment of the present invention, the operating mode determining unit 4014 is specifically configured to determine that the engine is in a starting mode when an engine operating condition is detected to enter an idle process from ignition;
When the engine is detected to be in a normal running working condition and the aftertreatment temperature of the SCR system is smaller than the preset temperature lower limit value, determining that the engine is in an SCREAT mode;
When the detected aftertreatment temperature is larger than the preset temperature lower limit value, determining that the engine is in a Normal mode;
When it is detected that the particulate matter in the particulate trap DPF is full, the engine is determined to be in a regeneration mode.
The device provided in this embodiment may be used to implement the technical solution of the above method embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
fig. 6 is a schematic hardware structure diagram of an exhaust temperature thermal management device according to an embodiment of the present invention. As shown in fig. 6, the exhaust temperature thermal management apparatus 60 of the present embodiment includes: a processor 601 and a memory 602; wherein
a memory 602 for storing computer-executable instructions;
a processor 601 for executing computer-executable instructions stored in the memory to implement the steps performed by the ECU in the above-described embodiments. Reference may be made in particular to the description relating to the method embodiments described above.
alternatively, the memory 602 may be separate or integrated with the processor 601.
When the memory 602 is provided separately, the exhaust temperature thermal management apparatus further includes a bus 603 for connecting the memory 602 and the processor 601.
an embodiment of the present invention further provides a computer-readable storage medium, where a computer executing instruction is stored in the computer-readable storage medium, and when a processor executes the computer executing instruction, the exhaust temperature thermal management method as described above is implemented.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. 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 modules, and may be in an electrical, mechanical or other form.
the modules described as separate parts may or may not be physically separate, and parts displayed as modules 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 modules may be selected according to actual needs to implement the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute some steps of the methods described in the embodiments of the present application.
it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
an exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. an exhaust temperature thermal management method, applied to an electronic control unit, comprising:
Acquiring the accelerator opening of an engine, the aftertreatment temperature of a Selective Catalytic Reduction (SCR) system, the engine speed and the engine working mode;
And when detecting that the accelerator opening is smaller than or equal to a preset opening threshold, the aftertreatment temperature is smaller than or equal to a preset temperature lower limit value, the engine speed is within a preset speed threshold range value and the engine working mode is in a preset mode, controlling an exhaust butterfly valve to hold air so as to improve the exhaust temperature.
2. the method of claim 1, wherein the default mode is a SCRHAET mode or a Normal mode.
3. The method of claim 1, wherein the obtaining an engine throttle opening, an SCR system aftertreatment temperature, an engine speed, and an engine operating mode comprises:
receiving an accelerator opening sent by an accelerator opening sensor of an engine;
Receiving a post-processing temperature sent by a temperature sensor of the SCR system;
receiving the engine speed sent by an engine speed sensor;
and acquiring the working state of the engine and/or the working state of the SCR system, and determining the working mode of the engine.
4. The method of claim 3, wherein the obtaining the operating state of the engine and/or the operating state of the SCR system and determining the engine operating mode comprises:
when the working condition of the engine is detected to enter an idling process from ignition, determining that the engine is in a starting mode;
When the engine is detected to be in a normal running working condition and the aftertreatment temperature of the SCR system is smaller than the preset temperature lower limit value, determining that the engine is in an SCREAT mode;
When the detected aftertreatment temperature is larger than the preset temperature lower limit value, determining that the engine is in a Normal mode;
When it is detected that the particulate matter in the particulate trap DPF is full, the engine is determined to be in a regeneration mode.
5. Method according to any one of claims 1 to 4, characterized in that the preset opening threshold is 0.
6. an exhaust temperature thermal management apparatus, comprising:
The parameter acquisition module is used for acquiring the accelerator opening of the engine, the aftertreatment temperature of the Selective Catalytic Reduction (SCR) system, the engine rotating speed and the engine working mode;
and the exhaust butterfly valve control module is used for controlling the exhaust butterfly valve to hold air so as to improve the exhaust temperature when detecting that the accelerator opening is smaller than or equal to a preset opening threshold value, the aftertreatment temperature is smaller than or equal to a preset temperature lower limit value, the engine speed is within a preset speed threshold value range value and the engine working mode is in a preset mode.
7. the apparatus of claim 6,
the parameter acquisition module comprises:
The first parameter acquisition unit is used for receiving the accelerator opening degree sent by an accelerator opening degree sensor of the engine;
the second parameter acquisition unit is used for receiving the post-processing temperature sent by the temperature sensor of the SCR system;
The third parameter acquisition unit is used for receiving the engine rotating speed sent by the engine rotating speed sensor;
And the working mode determining unit is used for acquiring the working state of the engine and/or the working state of the SCR system and determining the working mode of the engine.
8. The apparatus of claim 7,
The working mode determining unit is specifically used for determining that the engine is in a starting mode when the working condition of the engine is detected to enter an idling process from ignition;
When the engine is detected to be in a normal running working condition and the aftertreatment temperature of the SCR system is smaller than the preset temperature lower limit value, determining that the engine is in an SCREAT mode;
when the detected aftertreatment temperature is larger than the preset temperature lower limit value, determining that the engine is in a Normal mode;
When it is detected that the particulate matter in the particulate trap DPF is full, the engine is determined to be in a regeneration mode.
9. an exhaust temperature thermal management apparatus, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the exhaust temperature thermal management method of any of claims 1 to 5.
10. A computer readable storage medium having computer executable instructions stored thereon which, when executed by a processor, implement the exhaust gas temperature thermal management method of any of claims 1 to 5.
CN201910884698.0A 2019-09-19 2019-09-19 exhaust temperature thermal management method and apparatus Pending CN110578607A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112983661A (en) * 2021-01-29 2021-06-18 广西玉柴机器股份有限公司 Engine plateau high-cold thermal management control device and method
CN113047970A (en) * 2021-03-04 2021-06-29 广西玉柴机器股份有限公司 Method and device for rapidly increasing exhaust temperature in alpine plateau
CN113320516A (en) * 2021-06-15 2021-08-31 东风越野车有限公司 Diesel hybrid vehicle exhaust temperature control method and apparatus
CN114458463A (en) * 2022-01-29 2022-05-10 徐州徐工挖掘机械有限公司 Engineering machinery emission thermal management system and method and engineering machinery
CN114991910A (en) * 2022-03-30 2022-09-02 潍柴动力股份有限公司 Control method and device of engine aftertreatment system and electronic equipment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2418369A1 (en) * 2010-08-13 2012-02-15 Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO System for controlling exhaust gas temperature of an internal combustion engine with an exhaust gas after-treatment device and prime mover including same
CN103282627A (en) * 2011-01-07 2013-09-04 德尔福技术控股有限公司 Internal combustion engine with exhaust after treatment and its method of operation
CN105745408A (en) * 2015-11-25 2016-07-06 株式会社小松制作所 Exhaust gas purification device
CN107429615A (en) * 2017-02-06 2017-12-01 株式会社小松制作所 Emission-control equipment and working truck
CN109667680A (en) * 2018-12-28 2019-04-23 潍柴动力股份有限公司 A kind of row warms management method and device, system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2418369A1 (en) * 2010-08-13 2012-02-15 Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO System for controlling exhaust gas temperature of an internal combustion engine with an exhaust gas after-treatment device and prime mover including same
CN103282627A (en) * 2011-01-07 2013-09-04 德尔福技术控股有限公司 Internal combustion engine with exhaust after treatment and its method of operation
CN105745408A (en) * 2015-11-25 2016-07-06 株式会社小松制作所 Exhaust gas purification device
CN107429615A (en) * 2017-02-06 2017-12-01 株式会社小松制作所 Emission-control equipment and working truck
CN109667680A (en) * 2018-12-28 2019-04-23 潍柴动力股份有限公司 A kind of row warms management method and device, system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吕江毅: "《现代轿车故障诊断与检测实训指导》", 28 February 2013 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112983661A (en) * 2021-01-29 2021-06-18 广西玉柴机器股份有限公司 Engine plateau high-cold thermal management control device and method
CN113047970A (en) * 2021-03-04 2021-06-29 广西玉柴机器股份有限公司 Method and device for rapidly increasing exhaust temperature in alpine plateau
CN113320516A (en) * 2021-06-15 2021-08-31 东风越野车有限公司 Diesel hybrid vehicle exhaust temperature control method and apparatus
CN113320516B (en) * 2021-06-15 2022-10-18 东风越野车有限公司 Diesel hybrid vehicle exhaust temperature control method and apparatus
CN114458463A (en) * 2022-01-29 2022-05-10 徐州徐工挖掘机械有限公司 Engineering machinery emission thermal management system and method and engineering machinery
CN114991910A (en) * 2022-03-30 2022-09-02 潍柴动力股份有限公司 Control method and device of engine aftertreatment system and electronic equipment
CN114991910B (en) * 2022-03-30 2024-03-19 潍柴动力股份有限公司 Control method and device of engine aftertreatment system and electronic equipment

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