CN112459913B - Thermal management control method and thermal management control system for removing crystals - Google Patents

Thermal management control method and thermal management control system for removing crystals Download PDF

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Publication number
CN112459913B
CN112459913B CN202011284921.7A CN202011284921A CN112459913B CN 112459913 B CN112459913 B CN 112459913B CN 202011284921 A CN202011284921 A CN 202011284921A CN 112459913 B CN112459913 B CN 112459913B
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temperature
temperature threshold
thermal management
threshold
engine
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CN112459913A (en
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王建东
谭治学
王佳兴
梁博强
陈火雷
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

The application relates to the technical field of engines, and discloses a thermal management control method and a thermal management control system for removing crystals, wherein the control method comprises the following steps: acquiring the heat management temperature of the engine in real time; comparing the thermal management temperature with a first temperature threshold, a second temperature threshold and a third temperature threshold, and generating adjustment information when the thermal management temperature is between the second temperature threshold and the third temperature threshold; the first temperature threshold is the temperature meeting the emission, the second temperature threshold is the temperature meeting the requirement of raising the temperature of the engine to the temperature of clearing crystallization, the third temperature threshold is the temperature of clearing crystallization, and the first temperature threshold is less than the second temperature threshold and less than the third temperature threshold; and raising the temperature of the thermal management temperature according to the adjusting information, so that the thermal management temperature of the engine is higher than a third temperature threshold value to remove crystallization. The control method can adjust the temperature in real time according to the working condition so as to achieve the purpose of timely cleaning crystals, and meanwhile, the oil consumption loss is reduced to the maximum extent.

Description

Thermal management control method and thermal management control system for removing crystals
Technical Field
The application relates to the technical field of engines, in particular to a thermal management control method and a thermal management control system for removing crystals.
Background
Diesel engine operation requires the reduction of nitrogen oxides by a Selective Catalytic Reduction (SCR) process to meet emission requirements. However, under some conditions, the aqueous urea solution required for SCR catalytic reduction cannot completely evaporate and decompose in the piping, resulting in urea deposits, called crystallization, on the mixer and piping.
At present, the crystal removal mode is mainly based on the direct triggering of a triggering condition, and the post injection or HC injection temperature raising is carried out under the regenerative heat management of an engine, but the method has high oil consumption loss, is easy to interrupt and misses the optimal removal opportunity. Therefore, how to remove the crystals in time and save oil is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a thermal management control method and a thermal management control system for removing crystals, which can adjust the temperature in real time according to the working condition so as to achieve the aim of timely removing the crystals and reduce the oil consumption loss to the maximum extent.
In one aspect, the present invention provides a thermal management control method for removing crystals, comprising:
acquiring the heat management temperature of the engine in real time;
comparing the thermal management temperature with a first temperature threshold, a second temperature threshold and a third temperature threshold, and generating adjustment information when the thermal management temperature is between the second temperature threshold and the third temperature threshold; the first temperature threshold is the temperature meeting the emission, the second temperature threshold is the temperature meeting the requirement of raising the temperature of the engine to the temperature of clearing crystallization, the third temperature threshold is the temperature of clearing crystallization, and the first temperature threshold is less than the second temperature threshold and less than the third temperature threshold;
and raising the temperature of the thermal management temperature according to the adjusting information, so that the thermal management temperature of the engine is higher than the third temperature threshold value to remove crystallization.
According to the control method, the first temperature threshold, the second temperature threshold and the third temperature threshold are set in advance, the heat management temperature of the engine is collected in real time, the heat management temperature is compared with the three temperature thresholds, when the heat management temperature is between the second temperature threshold and the third temperature threshold, the heat management temperature is raised to be higher than the third temperature threshold, and the crystals can be evaporated and decomposed by the heat management temperature, so that the purpose of removing the crystals is achieved. The engine monitors the heat management temperature in real time in the running process, and the working condition of the engine can be obtained in time, so that the optimal window period is searched according to the current working condition, crystals are removed in time, the success rate of heat management is ensured, and meanwhile, the post-injection or HC injection temperature raising is not required to be carried out under the regenerative heat management of the engine, so that the oil consumption loss is reduced to the maximum extent.
Therefore, the thermal management control method for clearing the crystals can adjust the temperature in real time according to the working condition so as to achieve the purpose of clearing the crystals in time and reduce the oil consumption loss to the maximum extent.
Preferably, the temperature raising the thermal management temperature according to the adjustment information includes:
when the thermal management temperature is lower than the first temperature threshold at the lowest and higher than the second temperature threshold at the highest, raising the temperature of the thermal management temperature through HC injection.
Preferably, the temperature raising the thermal management temperature according to the adjustment information further includes:
when the thermal management temperature minimum temperature is between the first threshold and the second threshold and is at most higher than the second threshold, HC injection conditions are satisfied by warming up the engine.
Preferably, the temperature raising the thermal management temperature according to the adjustment information further includes:
adjusting the second to fourth temperature thresholds and adjusting the third to fifth temperature thresholds when crystals cannot be completely cleaned by the method;
when the thermal management temperature is between the fourth temperature threshold and the fifth temperature threshold, raising the thermal management temperature so that the thermal management temperature of the engine is higher than the fifth temperature threshold to remove crystallization;
wherein the fourth temperature threshold is higher than the first temperature threshold and lower than the second temperature threshold, and the fifth temperature threshold is higher than the third temperature threshold.
Preferably, the first temperature threshold is 220-230 ℃, the second temperature threshold is 280-290 ℃, and the third temperature threshold is 450-460 ℃.
In another aspect, the present invention further provides a thermal management control system, including:
the acquisition unit is used for acquiring the heat management temperature of the engine in real time;
the processing unit is used for comparing the thermal management temperature with a first temperature threshold, a second temperature threshold and a third temperature threshold, and generating adjustment information when the thermal management temperature is between the second temperature threshold and the third temperature threshold; the first temperature threshold is the temperature meeting the emission, the second temperature threshold is the temperature meeting the requirement of raising the temperature of the engine to the temperature of clearing crystallization, the third temperature threshold is the temperature of clearing crystallization, and the first temperature threshold is less than the second temperature threshold and less than the third temperature threshold;
and the execution unit is used for raising the temperature of the thermal management temperature according to the adjustment information so that the thermal management temperature of the engine is higher than the third temperature threshold value to remove crystals.
Preferably, the execution unit is specifically configured to:
when the thermal management temperature is lower than the first temperature threshold at the lowest and higher than the second temperature threshold at the highest, raising the temperature of the thermal management temperature through HC injection.
Preferably, the execution unit is further specifically configured to:
satisfying HC injection conditions by heating the engine when the thermal management temperature minimum temperature is between the first threshold and the second threshold, and maximum above the second threshold.
Preferably, the execution unit is further specifically configured to:
when the crystals cannot be completely cleaned by the temperature raising method, adjusting the second temperature threshold to a fourth temperature threshold, and adjusting the third temperature threshold to a fifth temperature threshold;
when the thermal management temperature is between the fourth temperature threshold and the fifth temperature threshold, raising the thermal management temperature such that the thermal management temperature of the engine is higher than the fifth temperature threshold to remove crystallization;
wherein the fourth temperature threshold is higher than the first temperature threshold and lower than the second temperature threshold, and the fifth temperature threshold is higher than the third temperature threshold.
Preferably, the first temperature threshold is 220-230 ℃, the second temperature threshold is 280-290 ℃, and the third temperature threshold is 450-460 ℃.
Drawings
FIG. 1 is a flow chart illustrating one step of a thermal management control method for removing crystals in an embodiment of the present invention;
FIG. 2 is a schematic diagram of the thermal management state in the first stage according to the embodiment of the present invention;
FIG. 3 is a diagram illustrating a thermal management state in a second stage according to the embodiment of the present invention;
FIG. 4 is a diagram illustrating a thermal management state in a third stage according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a thermal management control system according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, the present invention provides a thermal management control method for removing crystals, which specifically includes the following steps:
s100: acquiring the heat management temperature of the engine in real time;
s200: comparing the thermal management temperature with a first temperature threshold, a second temperature threshold and a third temperature threshold, and generating adjustment information when the thermal management temperature is between the second temperature threshold and the third temperature threshold; the first temperature threshold is the temperature meeting the emission, the second temperature threshold is the temperature meeting the requirement of raising the temperature of the engine to the temperature of clearing crystallization, the third temperature threshold is the temperature of clearing crystallization, and the first temperature threshold is less than the second temperature threshold and less than the third temperature threshold;
s300: and raising the thermal management temperature according to the regulating information so that the thermal management temperature of the engine is higher than a third temperature threshold value to remove crystallization.
According to the control method, the first temperature threshold, the second temperature threshold and the third temperature threshold are set in advance, the heat management temperature of the engine is collected in real time, the heat management temperature is compared with the three temperature thresholds, when the heat management temperature is between the second temperature threshold and the third temperature threshold, the heat management temperature is raised to be higher than the third temperature threshold, and the crystals can be evaporated and decomposed by the heat management temperature, so that the purpose of removing the crystals is achieved. The engine monitors the heat management temperature in real time in the running process, and the working condition of the engine can be obtained in time, so that the optimal window period is searched according to the current working condition, crystals are removed in time, the success rate of heat management is ensured, and meanwhile, the post-injection or HC injection temperature raising is not required to be carried out under the regenerative heat management of the engine, so that the oil consumption loss is reduced to the maximum extent.
Therefore, the thermal management control method for clearing the crystals can adjust the temperature in real time according to the working condition so as to achieve the purpose of clearing the crystals in time and reduce the oil consumption loss to the maximum extent.
It should be noted that, in the above method, the three stages may be divided into by acquiring the thermal management temperature of the engine in real time, and determining whether to raise the thermal management temperature according to the temperature to remove crystals, so as to select a proper temperature raising strategy according to the current working condition of the engine, thereby further reducing the oil consumption loss.
Based on this, the trigger condition for clearing the crystallization can be reasonably selected for different models, and in one embodiment, the trigger condition for clearing the crystallization can be determined based on three ways, i.e., mileage, runtime, and model crystallization amount. For any one of the above modes, in combination with the formation rate of crystals and the difficulty of removal, the crystal removal time can be divided into three stages, and three control methods for removing crystals by raising the temperature are simultaneously adopted, specifically as follows:
the first stage is as follows: when the running time or mileage of the engine or the predicted value of the model is small, the engine is mainly in emission economy at the moment, and as can be seen by combining the graph shown in fig. 2, the temperature during the thermal management of the engine is at least lower than the first temperature threshold value and at most higher than the second temperature threshold value, under the working condition, a proper thermal management window is searched, namely when the thermal management temperature is higher than the second temperature threshold value, the temperature is raised through HC injection to remove crystals. Generally, the normal operation mode is efficient, the temperature is increased along with the normal operation mode, and the crystallization amount at the stage is low and is easy to eliminate. It should be noted that this stage is the main recommended purging mode.
And a second stage: when the time or mileage of the engine or the predicted value of the model begins to increase and is greater than the first stage, and due to the operation condition, no proper temperature raising condition is found in the first stage time mileage, namely the temperature of the thermal management in the first stage is lower than the second temperature threshold value. As can be seen from fig. 3, in the second stage, the temperature for thermal management is always higher than the first temperature threshold and at most higher than the second temperature threshold, then the crystallization thermal management needs to be performed in this stage after the engine heating is forced to meet the HC injection condition, specifically, when the temperature for thermal management is higher than the second temperature threshold, the temperature is raised so that the temperature in the process is higher than the third temperature threshold. It should be noted that this method is mainly based on the emission of the cleaning crystals, and the fuel consumption sacrifice is higher than that in the first stage.
And a third stage: when the running time or mileage of the engine or the predicted value of the model is continuously increased and is greater than the second stage, and the crystal removal in the first stage and the second stage is not successful, or the second stage is not completely successful, the temperature raising time and the temperature raising temperature of the thermal management need to be adjusted correspondingly according to actual detection experience. As can be seen in fig. 4, as in the first stage, when the temperature of the engine during thermal management is lower than the first temperature threshold at the lowest and higher than the fourth temperature threshold at the highest, new adjustment information is generated when the thermal management temperature is higher than the fourth temperature threshold, and temperature raising is performed according to the new adjustment information, so that the thermal management temperature is higher than the fifth temperature threshold in the process to clear crystals.
It should be noted that, in the third stage, since the second temperature threshold value to the fourth temperature threshold value are adjusted downward, temperature increase can be started early, the temperature after temperature increase is more favorable for clearing crystals, and the temperature increase time is increased, and the stage mainly discharges and clears crystals, but the oil consumption sacrifice is high.
It should be further noted that, in the control method for thermal management in the embodiment of the present invention, 90% of usage scenarios can be controlled to complete triggering and clearing of thermal management of crystallization in the first stage and the second stage, and the third stage is less used.
It should be further noted that the triggering condition for temperature raising in each stage is mainly the current thermal management temperature, and the triggering condition for temperature raising can be determined together with the current vehicle speed and the flow rate of the exhaust gas, so that the current working condition of the engine can be obtained more accurately, crystals can be removed better, and oil consumption can be reduced.
In one embodiment, the first temperature threshold may be 220-230 ℃, the second temperature threshold may be 280-290 ℃, and the third temperature threshold may be 450-460 ℃. Of course, the appropriate temperature threshold may be selected according to the type of the engine, and is not limited herein.
Based on the same inventive concept, as shown in fig. 5, the present application may further provide a thermal management control system, which specifically includes:
the acquisition unit 10 is used for acquiring the heat management temperature of the engine in real time;
the processing unit 20 is configured to compare the thermal management temperature with the first temperature threshold, the second temperature threshold, and the third temperature threshold, and generate adjustment information when the thermal management temperature is between the second temperature threshold and the third temperature threshold; the first temperature threshold is the temperature meeting the emission, the second temperature threshold is the temperature meeting the requirement of raising the temperature of the engine to the temperature of clearing crystallization, the third temperature threshold is the temperature of clearing crystallization, and the first temperature threshold is less than the second temperature threshold and less than the third temperature threshold;
and the execution unit 30 is used for raising the thermal management temperature according to the adjustment information so that the thermal management temperature of the engine is higher than a third temperature threshold value to remove the crystals.
Further, the execution unit 30 may be configured to: when the thermal management temperature is at least below a first temperature threshold and at most above a second temperature threshold, the thermal management temperature is ramped up with HC injection.
Further, the execution unit 30 may further be configured to: HC injection conditions are satisfied by heating the engine when the thermal management temperature minimum temperature is between a first threshold and a second threshold, and maximum above the second threshold.
Further, the execution unit 30 may further be configured to: when the crystals cannot be completely cleaned by the temperature raising method, adjusting the second temperature threshold to a fourth temperature threshold, and adjusting the third temperature threshold to a fifth temperature threshold;
when the thermal management temperature is between the fourth temperature threshold and the fifth temperature threshold, raising the temperature of the thermal management temperature to enable the thermal management temperature of the engine to be higher than the fifth temperature threshold so as to remove crystallization;
the fourth temperature threshold is higher than the first temperature threshold and lower than the second temperature threshold, and the fifth temperature threshold is higher than the third temperature threshold.
Specifically, the first temperature threshold preset in the processing unit 20 is 220-230 ℃, the second temperature threshold is 280-290 ℃, and the third temperature threshold is 450-460 ℃.
It should be noted that the thermal management control method of the thermal management control system is the same as the above-mentioned thermal management control method for removing crystals, and details are not repeated here, and the thermal management control system provided by the present application can be adapted to thermal management triggering and management schemes of varied working conditions of market segments. And (4) detecting in a grading way, finding the optimal window period, and progressing layer by layer, so that the success rate of thermal management is ensured, and the oil consumption loss is reduced to the maximum extent.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (4)

1. A method of thermal management control for crystal removal, comprising:
acquiring the heat management temperature of the engine during emission in real time;
comparing the thermal management temperature with a first temperature threshold, a second temperature threshold and a third temperature threshold, and generating adjustment information when the thermal management temperature is between the second temperature threshold and the third temperature threshold; the first temperature threshold is the temperature meeting the emission, the second temperature threshold is the temperature meeting the requirement of raising the temperature of the engine to the temperature of clearing crystallization, the third temperature threshold is the temperature of clearing crystallization, and the first temperature threshold is less than the second temperature threshold and less than the third temperature threshold;
raising the temperature of the thermal management temperature according to the adjusting information, so that the thermal management temperature of the engine is higher than the third temperature threshold value to remove crystallization;
the temperature raising the thermal management temperature according to the adjustment information comprises:
when the thermal management temperature is lower than the first temperature threshold at the lowest part and higher than the second temperature threshold at the highest part, raising the temperature of the thermal management temperature through HC injection;
the temperature raising is performed on the thermal management temperature according to the adjustment information, and the method further comprises the following steps:
satisfying HC injection conditions by warming the engine when the thermal management temperature minimum temperature is between the first temperature threshold and the second temperature threshold, and is at most above the second temperature threshold;
the temperature raising is performed on the thermal management temperature according to the adjustment information, and the method further comprises the following steps:
adjusting the second to fourth temperature thresholds and adjusting the third to fifth temperature thresholds when the thermal management temperature is warmed by HC injection or crystallization is not completely cleared by a method of heating an engine to satisfy HC injection conditions;
when the thermal management temperature is between the fourth temperature threshold and the fifth temperature threshold, raising the thermal management temperature so that the thermal management temperature of the engine is higher than the fifth temperature threshold to remove crystallization;
wherein the fourth temperature threshold is higher than the first temperature threshold and lower than the second temperature threshold, and the fifth temperature threshold is higher than the third temperature threshold.
2. The thermal management control method for crystal removal according to claim 1, wherein the first temperature threshold is 220-230 ℃, the second temperature threshold is 280-290 ℃, and the third temperature threshold is 450-460 ℃.
3. A thermal management control system, comprising:
the acquisition unit is used for acquiring the heat management temperature of the engine in real time;
the processing unit is used for comparing the thermal management temperature with a first temperature threshold, a second temperature threshold and a third temperature threshold, and generating adjustment information when the thermal management temperature is between the second temperature threshold and the third temperature threshold; the first temperature threshold is the temperature meeting the emission, the second temperature threshold is the temperature meeting the requirement of raising the temperature of the engine to the temperature of clearing crystallization, the third temperature threshold is the temperature of clearing crystallization, and the first temperature threshold is less than the second temperature threshold and less than the third temperature threshold;
the execution unit is used for raising the temperature of the thermal management temperature according to the adjustment information so that the thermal management temperature of the engine is higher than the third temperature threshold value to remove crystals;
the execution unit is specifically configured to:
when the thermal management temperature is lower than the first temperature threshold at the lowest part and higher than the second temperature threshold at the highest part, raising the temperature of the thermal management temperature through HC injection;
the execution unit is specifically further configured to:
satisfying HC injection conditions by heating the engine when the thermal management temperature minimum temperature is between the first temperature threshold and the second temperature threshold, and is at most above the second temperature threshold;
the execution unit is specifically further configured to:
adjusting the second to fourth temperature thresholds and adjusting the third to fifth temperature thresholds when the thermal management temperature is warmed by HC injection or crystals are not completely cleaned by a method of heating an engine to satisfy HC injection conditions;
when the thermal management temperature is between the fourth temperature threshold and the fifth temperature threshold, raising the thermal management temperature so that the thermal management temperature of the engine is higher than the fifth temperature threshold to remove crystallization;
wherein the fourth temperature threshold is higher than the first temperature threshold and lower than the second temperature threshold, and the fifth temperature threshold is higher than the third temperature threshold.
4. The thermal management control system of claim 3, wherein the first temperature threshold is 220-230 ℃, the second temperature threshold is 280-290 ℃, and the third temperature threshold is 450-460 ℃.
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