CN113513421B - Vehicle thermal management control method, device, equipment, medium and product - Google Patents

Vehicle thermal management control method, device, equipment, medium and product Download PDF

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CN113513421B
CN113513421B CN202110607462.XA CN202110607462A CN113513421B CN 113513421 B CN113513421 B CN 113513421B CN 202110607462 A CN202110607462 A CN 202110607462A CN 113513421 B CN113513421 B CN 113513421B
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temperature
thermal management
preset
threshold range
inlet
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CN113513421A (en
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赵德财
魏京
孙善良
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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
    • F02D41/024—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
    • 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

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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 embodiment of the invention provides a vehicle thermal management control method, a device, equipment, a medium and a product, wherein the method comprises the following steps: acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from an inlet temperature sensor; determining the number of temperature pairs of which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range in each adjacent inlet temperature; and if the temperature logarithm quantity is determined to be larger than or equal to a preset temperature logarithm threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold. According to the vehicle thermal management control method provided by the embodiment of the invention, the initial thermal management temperature threshold range is adjusted according to the preset adjustment threshold, so that the engine can be in a longer heating mode or a longer normal mode, the frequency of entering and exiting the heating mode of the engine is reduced, and the thermal management efficiency is improved.

Description

Vehicle thermal management control method, device, equipment, medium and product
Technical Field
The embodiment of the invention relates to the technical field of vehicles, in particular to a vehicle thermal management control method, device, equipment, medium and product.
Background
Diesel aftertreatment systems include DOCs (collectively referred to as Diesel Oxidation catalysts, chinese), DPFs (collectively referred to as Diesel Particulate filters, chinese), and SCRs (collectively referred to as Selective Catalytic reducers). Because the catalytic reaction is greatly influenced by temperature, the exhaust temperature is low in a low-temperature environment, and the post-treatment system is easy to generate the problems of low catalytic reaction efficiency, SCR crystallization, DPF carbon deposition and the like.
Currently, the problem of the aftertreatment system in a low-temperature environment is generally adjusted by means of thermal management. The thermal management mainly changes the combustion state in the cylinder by means of holding back an air inlet throttle valve, in-cylinder post-injection and the like, so that the exhaust temperature is improved, and the working performance of an aftertreatment system is improved. The thermal management needs to detect the exhaust temperature of the SCR inlet in real time through an engine control unit, when the exhaust temperature of the SCR inlet is within a thermal management temperature threshold range, the engine is controlled to enter a heating mode, and when the exhaust temperature of the SCR inlet is not within the thermal management temperature threshold range, the engine is controlled to enter a normal mode. According to the thermal management control mode, under partial working conditions, due to the fact that the exhaust temperature frequently enters and exits the thermal management threshold range, the exhaust temperature frequently enters and exits the thermal management, and therefore the thermal management efficiency is reduced.
Disclosure of Invention
The invention provides a vehicle thermal management control method, device, equipment, medium and product, which are used for solving the problem that the thermal management efficiency is reduced because frequent entering and exiting of thermal management threshold ranges of exhaust temperature can cause frequent entering and exiting of thermal management.
The first aspect of the embodiment of the invention provides a vehicle thermal management control method, which comprises the following steps:
acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from an inlet temperature sensor; the inlet temperatures are arranged in chronological order;
determining the number of temperature pairs of which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range in each adjacent inlet temperature;
if the temperature logarithm quantity is determined to be greater than or equal to a preset temperature pair threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold, so that the temperature logarithm quantity in a second preset time period after the first preset time period is smaller than the temperature pair threshold;
and performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range.
Optionally, the determining, by the method as described above, the number of temperature pairs in which one of the adjacent inlet temperatures is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the thermal management temperature threshold range includes:
determining an increasing temperature sequence of increasing temperatures and a decreasing temperature sequence of decreasing temperatures for each of the inlet temperatures;
determining the number of the incremental temperature sequences with one of the adjacent inlet temperatures being in a preset initial thermal management temperature threshold range and the other inlet temperature being greater than or equal to the maximum value in the preset initial thermal management temperature threshold range in each incremental temperature sequence;
determining the number of the decreasing temperature sequences, wherein one of the adjacent inlet temperatures is in a preset initial thermal management temperature threshold range and the other inlet temperature is smaller than the minimum value in the preset initial thermal management temperature threshold range, in each decreasing temperature sequence;
determining a sum of each of the increasing temperature series quantities and each of the decreasing temperature series quantities as the temperature pair quantity.
Optionally, in the method described above, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold includes:
and respectively increasing the temperatures at the two ends of the initial thermal management temperature threshold range by preset adjustment thresholds.
Optionally, in the method, after the temperatures at two ends of the thermal management temperature threshold range are respectively increased by preset adjustment thresholds, the method further includes:
obtaining an inlet temperature of the selective catalytic reducer from the inlet temperature sensor for a second preset time period after the first preset time period;
determining the number of temperature pairs in each adjacent inlet temperature, wherein one inlet temperature is in the adjusted thermal management temperature threshold range, and the other inlet temperature is out of the thermal management temperature threshold range;
if the temperature logarithm quantity is determined to be larger than or equal to a preset temperature logarithm threshold, increasing the thermal management temperature threshold range again according to a preset adjustment threshold;
and if the temperature pair number is smaller than the preset temperature pair threshold, recovering the initial thermal management temperature threshold range according to the thermal management temperature threshold range after the preset adjustment threshold is increased.
Optionally, in the method as described above, before increasing the thermal management temperature threshold range according to the preset adjustment threshold again, the method further includes:
determining whether the difference value between the adjusted thermal management temperature threshold range and the initial thermal management temperature threshold range is greater than or equal to a preset adjustment upper limit value;
if the difference is larger than or equal to a preset adjusting upper limit value, maintaining the thermal management temperature threshold range unchanged;
and if the difference is smaller than the preset adjustment upper limit value, executing the step of increasing the thermal management temperature threshold range again according to the preset adjustment threshold value.
Optionally, in the method, before the step of restoring the initial thermal management temperature threshold range according to the thermal management temperature threshold range after the thermal management temperature threshold range is increased according to the preset adjustment threshold, the method further includes:
maintaining the thermal management temperature threshold range unchanged for a third preset time period.
Optionally, the method as described above, before determining the number of temperature pairs in which one of the adjacent inlet temperatures is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the thermal management temperature threshold range, the method further includes:
determining the average temperature of each inlet temperature, and judging whether the average temperature is within a preset temperature threshold range;
if the average temperature is within a preset temperature threshold range, executing the step of determining the logarithm of the temperature of one of the adjacent inlet temperatures within a preset initial thermal management temperature threshold range and the logarithm of the temperature of the other inlet temperature outside the thermal management temperature threshold range;
before the step of obtaining the inlet temperature of the selective catalytic reduction device in the first preset time period from the inlet temperature sensor, the method further comprises the following steps:
acquiring the engine speed and the current inlet temperature of the selective catalytic reducer from the inlet temperature sensor;
determining whether the engine speed is greater than a preset speed threshold and whether the current inlet temperature is greater than a preset temperature threshold;
and if the engine rotating speed is greater than a preset rotating speed threshold value and the current inlet temperature is greater than a preset temperature threshold value, executing the step of acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from the inlet temperature sensor.
A second aspect of an embodiment of the present invention provides a vehicle thermal management control apparatus, including:
the acquisition module is used for acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from the inlet temperature sensor; the inlet temperatures are arranged in chronological order;
the temperature determination module is used for determining the number of temperature pairs of which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the thermal management temperature threshold range in each adjacent inlet temperature;
an adjusting module, configured to adjust the initial thermal management temperature threshold range according to a preset adjusting threshold if it is determined that the temperature logarithm quantity is greater than or equal to a preset temperature pair threshold, so that the temperature logarithm quantity in a second preset time period after the first preset time period is smaller than the temperature pair threshold;
and the control module is used for carrying out thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range.
Optionally, in the apparatus described above, the temperature determining module is specifically configured to:
determining an increasing temperature sequence of increasing temperatures and a decreasing temperature sequence of decreasing temperatures for each of the inlet temperatures; determining the number of the incremental temperature sequences with one of the adjacent inlet temperatures being in a preset initial thermal management temperature threshold range and the other inlet temperature being greater than or equal to the maximum value in the preset initial thermal management temperature threshold range in each incremental temperature sequence; determining the number of descending temperature sequences, in which one of the adjacent inlet temperatures is in a preset initial thermal management temperature threshold range and the other inlet temperature is smaller than the minimum value in the preset initial thermal management temperature threshold range, in each descending temperature sequence; determining a sum of each of the increasing temperature series quantities and each of the decreasing temperature series quantities as the temperature pair quantity.
Optionally, in the apparatus described above, when the adjusting module adjusts the initial thermal management temperature threshold range according to a preset adjustment threshold, the adjusting module is specifically configured to:
and respectively increasing the temperatures at the two ends of the initial thermal management temperature threshold range by preset adjustment thresholds.
Optionally, in the apparatus as described above, the adjusting module is further configured to:
acquiring the inlet temperature of the selective catalytic reducer in a second preset time period after the first preset time period from the inlet temperature sensor; determining the number of temperature pairs in each adjacent inlet temperature, wherein one inlet temperature is in the adjusted thermal management temperature threshold range, and the other inlet temperature is out of the thermal management temperature threshold range; if the temperature logarithm quantity is determined to be larger than or equal to a preset temperature logarithm threshold, increasing the thermal management temperature threshold range again according to a preset adjustment threshold; and if the temperature pair number is smaller than the preset temperature pair threshold, recovering the initial thermal management temperature threshold range according to the thermal management temperature threshold range after the preset adjustment threshold is increased.
Optionally, in the apparatus described above, the adjusting module is further configured to:
determining whether the difference value between the adjusted thermal management temperature threshold range and the initial thermal management temperature threshold range is greater than or equal to a preset adjustment upper limit value; if the difference is larger than or equal to a preset adjustment upper limit value, maintaining the range of the thermal management temperature threshold value unchanged; and if the difference is smaller than the preset adjustment upper limit value, executing the step of increasing the thermal management temperature threshold range again according to the preset adjustment threshold value.
Optionally, in the apparatus as described above, the adjusting module is further configured to:
maintaining the thermal management temperature threshold range unchanged for a third preset time period.
Optionally, the apparatus as described above, further comprising:
the judging module is used for determining the average temperature of each inlet temperature and judging whether the average temperature is within a preset temperature threshold range; if the average temperature is within a preset temperature threshold range, executing the step of determining the logarithm of the temperature of one of the adjacent inlet temperatures within a preset initial thermal management temperature threshold range and the logarithm of the temperature of the other inlet temperature outside the thermal management temperature threshold range;
the device further comprises:
a vehicle condition determination module for obtaining an engine speed and a current inlet temperature of the selective catalytic reducer from the inlet temperature sensor; determining whether the engine speed is greater than a preset speed threshold and whether the current inlet temperature is greater than a preset temperature threshold; and if the engine rotating speed is greater than a preset rotating speed threshold value and the current inlet temperature is greater than a preset temperature threshold value, the step of obtaining the inlet temperature of the selective catalytic reduction device in a first preset time period from the inlet temperature sensor is executed.
A third aspect of embodiments of the present invention provides an electronic device, including: a memory, a processor;
a memory; a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the vehicle thermal management control method of any one of the first aspect by the processor.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions, when executed by a processor, are used to implement the vehicle thermal management control method according to any one of the first aspect.
A fifth aspect of the embodiments of the present invention provides a computer program product, which includes a computer program that, when executed by a processor, implements the vehicle thermal management control method according to any one of the first aspects.
The embodiment of the invention provides a vehicle thermal management control method, a vehicle thermal management control device, vehicle thermal management control equipment, vehicle thermal management control media and a vehicle thermal management control product, wherein the method comprises the following steps: acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from an inlet temperature sensor; the inlet temperatures are arranged in chronological order; determining the number of temperature pairs of which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range in each adjacent inlet temperature; if the temperature logarithm quantity is determined to be greater than or equal to a preset temperature pair threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold, so that the temperature logarithm quantity in a second preset time period after the first preset time period is smaller than the temperature pair threshold; and performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range. According to the vehicle thermal management control method, the inlet temperatures of the selective catalytic reduction device in the first preset time period are obtained, and the number of temperature pairs of which one inlet temperature is within the preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range in each adjacent inlet temperature is determined. When the number of the temperature pairs is greater than or equal to the preset temperature pair threshold, the engine frequently enters the heating mode and exits the heating mode within the first preset time period, and at the moment, the range of the initial thermal management temperature threshold is adjusted according to the preset adjustment threshold, so that the engine can be in a longer heating mode or a longer normal mode, the frequency of the engine entering the heating mode and exiting the heating mode is reduced, and the thermal management efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a diagram of a vehicle thermal management control method that may implement an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a vehicle thermal management control method according to a first embodiment of the invention;
FIG. 3 is a flowchart illustrating a vehicle thermal management control method according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of an architecture of components of a vehicle thermal management control method according to a second embodiment of the present invention;
FIG. 5 is a schematic diagram of DPF and DOC inlet temperatures for a vehicle thermal management control method provided by a second embodiment of the present invention;
FIG. 6 is a schematic diagram of SCR inlet temperature and engine operating mode of a vehicle thermal management control method according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a vehicle thermal management control device according to a third embodiment of the invention;
fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.
With the above figures, there are shown certain embodiments of the invention and will be described in more detail hereinafter. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
For a clear understanding of the technical solutions of the present application, a detailed description of the prior art solutions will be given first. The existing diesel engine post-treatment system comprises a DOC diesel engine oxidation catalyst, a DPF diesel engine particle trap and an SCR selective catalytic reduction device, and an inlet temperature sensor is arranged at the inlet of each device, so that the inlet temperature of exhaust gas at each device can be detected. Because the catalytic reaction is greatly influenced by temperature, the exhaust temperature is low in a low-temperature environment, and the post-treatment system is easy to generate the problems of low catalytic reaction efficiency, SCR crystallization, DPF carbon deposition and the like. At present, aiming at the phenomenon, adjustment is generally performed in a heat management mode, for example, the combustion state in a cylinder is changed by means of holding out an air inlet throttle valve, injecting in the cylinder backwards and the like, so that the exhaust temperature is increased. After adjusting the combustion state, the combustion of the diesel fuel is in an insufficient combustion state, which reduces the efficiency of supplying energy when the diesel fuel is combusted. Namely, the heat management mode is to increase the exhaust temperature on the premise of sacrificing the combustion efficiency of diesel oil, thereby improving the efficiency of catalytic reaction.
And when the control device of the engine detects that the exhaust temperature of the SCR inlet is within the thermal management temperature threshold range, the control device of the engine controls the engine to enter a heating mode, and when the exhaust temperature of the SCR inlet is not within the thermal management temperature threshold range, the control device of the engine controls the engine to enter a normal mode. Under some conditions, due to the high frequency of exhaust temperature changes, the control device of the engine may control the engine to frequently enter or exit thermal management, thereby reducing the efficiency of thermal management.
Therefore, aiming at the problem that the thermal management efficiency is reduced because frequent entering and exiting of the thermal management threshold range of the exhaust temperature can cause frequent entering and exiting of the thermal management, the inventor finds in research that in order to solve the problem that the thermal management efficiency is reduced because frequent entering and exiting of the thermal management threshold range of the exhaust temperature can cause frequent entering and exiting of the thermal management at present, the thermal management threshold range can be adjusted when the frequent entering or exiting of the engine is determined, so that the thermal management efficiency is improved. Specifically, the inlet temperature of the selective catalytic reduction device in a first preset time period is acquired from an inlet temperature sensor, and the inlet temperatures are arranged according to a time sequence. The first preset time period can be set according to actual requirements. A number of temperature pairs in each of the adjacent inlet temperatures is then determined, with one of the inlet temperatures being within a preset initial thermal management temperature threshold range and the other inlet temperature being outside the initial thermal management temperature threshold range. If the temperature pair number is determined to be greater than or equal to the preset temperature pair threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold, so that the temperature pair number in a second preset time period after the first preset time period is smaller than the temperature pair threshold. And performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range. According to the vehicle thermal management control method provided by the embodiment of the invention, when the number of the temperature pairs is greater than or equal to the preset temperature pair threshold, the engine frequently enters the heating mode and exits the heating mode within the first preset time period, and at the moment, the range of the initial thermal management temperature threshold is adjusted according to the preset adjustment threshold, so that the engine can be in a longer heating mode or a longer normal mode, the frequency of the engine entering and exiting the heating mode is reduced, and the thermal management efficiency is improved.
The inventor proposes a technical scheme of the application based on the creative discovery.
An application scenario of the vehicle thermal management control method provided by the embodiment of the invention is described below. As shown in fig. 1, 1 is an electronic device, 2 is an inlet temperature sensor of a selective catalytic reducer, and 3 is a selective catalytic reducer. The network architecture of the application scene corresponding to the vehicle thermal management control method provided by the embodiment of the invention comprises the following steps: an electronic device 1, an inlet temperature sensor 2 of a selective catalytic reducer, and a selective catalytic reducer 3. The Electronic device 1 may be an engine Control Unit ECU (collectively referred to as Electronic Control Unit). The gas discharged after the DPF treatment is received through an inlet of the SCR selective catalytic reducer 3, treated by the SCR selective catalytic reducer 3, and discharged outside the vehicle through a tail pipe. The electronic device 1 acquires the inlet temperature detected by the inlet temperature sensor 2 in real time, and when the current state of the engine needs to be determined, the electronic device 1 acquires the inlet temperature of the catalytic reduction device 3 within a first preset time period from the inlet temperature sensor 2, wherein the inlet temperatures are arranged according to a time sequence. At the same time, the electronic device 1 determines the number of temperature pairs in each of the adjacent inlet temperatures, one of which is within a preset initial thermal management temperature threshold range and the other of which is outside the initial thermal management temperature threshold range. If the temperature pair number is determined to be greater than or equal to the preset temperature pair threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold, so that the temperature pair number in a second preset time period after the first preset time period is smaller than the temperature pair threshold. The second preset time period may be the same as a time length of the first preset time period. Finally, the electronic device 1 performs thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range. After the electronic device 1 adjusts the thermal management temperature threshold range, the engine can be controlled to be in a long-time heating mode, a short-time normal mode, or a short-time heating mode, a long-time normal mode, so that the frequency of entering or exiting the thermal management of the engine is reduced, and the efficiency of the thermal management is improved.
The embodiments of the present invention will be described with reference to the accompanying drawings.
Fig. 2 is a schematic flow chart of a vehicle thermal management control method according to a first embodiment of the present invention, and as shown in fig. 2, in this embodiment, an execution subject of the embodiment of the present invention is a vehicle thermal management control device, and the vehicle thermal management control device may be located in an engine control unit. The vehicle thermal management control method provided by the embodiment includes the following steps:
step S101, acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from an inlet temperature sensor. The inlet temperatures were arranged in chronological order.
In this embodiment, the inlet temperature sensor is disposed at an exhaust inlet of the selective catalytic reducer SCR to detect the inlet temperature of the selective catalytic reducer in real time. The first preset time period may be set according to actual requirements, for example, set within half an hour, within 15 minutes, and the like.
Step S102, determining the number of temperature pairs of which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range in each adjacent inlet temperature.
In this embodiment, the inlet temperatures are sorted in time sequence, and the adjacent inlet temperatures are the inlet temperatures of the adjacent time. For example, 10 minutes inlet temperature and 10 minutes 01 seconds inlet temperature are adjacent inlet temperatures. The preset initial thermal management temperature threshold range refers to the thermal management temperature threshold range before adjustment. Assuming that the initial thermal management temperature threshold range is 280-300 ℃, and the 10-minute inlet temperature is 299 ℃ and the 10-minute 01-second inlet temperature is 301 ℃ among the adjacent inlet temperatures, the adjacent inlet temperatures are temperature pairs in which one inlet temperature is within the preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range.
When the inlet temperature rises from 299 to 301 ℃, the engine exits the heating mode and enters the normal mode. The normal mode is an operation mode in which the exhaust temperature is actively raised without holding the intake throttle valve or the like. Similarly, assume that after the inlet temperature is reduced from 281 ℃ to 279 ℃, the engine will exit the heating mode and enter the normal mode. And when the inlet temperature starts to rise again and the temperature is less than 300 ℃, controlling the engine to enter a heating mode. Thus, the number of temperature pairs for which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range may reflect the frequency with which the engine enters the heating mode.
Step S103, if it is determined that the number of temperature pairs is greater than or equal to the preset temperature pair threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold, so that the number of temperature pairs in a second preset time period after the first preset time period is less than the temperature pair threshold.
In this embodiment, when the engine enters the thermal management state, the engine enters the heating mode, and when the engine exits the thermal management state, the heating mode is also exited. The temperature pair threshold may be set according to a first preset time period, for example, within half an hour of the first preset time period, the temperature pair threshold may be set to 8. Adjusting the initial thermal management temperature threshold range is mainly used for enabling the number of temperature pairs in a second preset time period after the first preset time period to be smaller than the temperature pair threshold value, so that the frequency of entering and exiting the heating mode of the engine is reduced.
Assuming that the initial thermal management temperature threshold range is 280-300 ℃, and the adjusted thermal management temperature threshold range is 350-370 ℃, most of the current exhaust temperature is generally smaller than the adjusted thermal management temperature threshold range 350-370 ℃ because the current exhaust temperature is in the vicinity of 280-300 ℃, so that the engine is controlled to continuously enter the heating mode and maintain for a longer time, the frequency of entering and exiting the heating mode of the engine is reduced, and the efficiency of thermal management is improved. Similarly, if the adjusted thermal management temperature threshold range is 230-250 ℃, because the current exhaust temperature is in the vicinity of 280-300 ℃, most of the current exhaust temperature is generally greater than the adjusted thermal management temperature threshold range, and therefore, the engine is controlled to continuously exit the heating mode and be maintained for a longer time, so that the frequency of entering and exiting the heating mode of the engine is reduced, and the thermal management efficiency is improved.
And step S104, performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range.
In this embodiment, after the thermal management temperature threshold range is adjusted, thermal management control is performed on the vehicle engine by using the adjusted thermal management temperature threshold range.
The embodiment of the invention provides a vehicle thermal management control method, which comprises the following steps: and acquiring the inlet temperature of the selective catalytic reducer in a first preset time period from the inlet temperature sensor. The inlet temperatures were arranged in chronological order. A number of temperature pairs in each adjacent inlet temperature is determined, one of the inlet temperatures being within a preset initial thermal management temperature threshold range and the other inlet temperature being outside the initial thermal management temperature threshold range. If the temperature pair number is determined to be greater than or equal to the preset temperature pair threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold, so that the temperature pair number in a second preset time period after the first preset time period is smaller than the temperature pair threshold. And performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range. According to the vehicle thermal management control method, the inlet temperatures of the selective catalytic reduction device in the first preset time period are obtained, and the number of temperature pairs of which one inlet temperature is within the range of the preset initial thermal management temperature threshold and the other inlet temperature is outside the range of the initial thermal management temperature threshold is determined. When the number of the temperature pairs is greater than or equal to the preset temperature pair threshold, the engine frequently enters the heating mode and exits the heating mode within the first preset time period, and at the moment, the range of the initial thermal management temperature threshold is adjusted according to the preset adjustment threshold, so that the engine can be in a longer heating mode or a longer normal mode, the frequency of the engine entering the heating mode and exiting the heating mode is reduced, and the thermal management efficiency is improved.
Fig. 3 is a schematic flow chart of a vehicle thermal management control method according to a second embodiment of the present invention, and as shown in fig. 3, the vehicle thermal management control method according to the present embodiment further refines steps 102 and 103 on the basis of the vehicle thermal management control method according to the previous embodiment of the present invention. The vehicle thermal management control method provided by the embodiment comprises the following steps.
Step S201, acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from an inlet temperature sensor. The inlet temperatures were arranged in chronological order.
In this embodiment, the implementation manner of step 201 is similar to that of step 101 in the previous embodiment of the present invention, and is not described in detail here.
Optionally, in this embodiment, before acquiring the inlet temperature of the selective catalytic reduction device within the first preset time period from the inlet temperature sensor, the method further includes:
the engine speed is obtained and the current inlet temperature of the selective catalytic reducer is obtained from the inlet temperature sensor.
It is determined whether the engine speed is greater than a preset speed threshold and the current inlet temperature is greater than a preset temperature threshold.
And if the engine speed is greater than the preset speed threshold and the current inlet temperature is greater than the preset temperature threshold, executing a step of acquiring the inlet temperature of the catalytic reducer within a first preset time period from the inlet temperature sensor.
In this embodiment, the engine speed is an important parameter representing the engine state, and if the engine speed is greater than the preset speed threshold, it represents that the engine is currently in a better operating state. If the current inlet temperature is greater than the preset temperature threshold, thermal management can be performed. If the vehicle is just started, the engine speed is low, and the current inlet temperature is also low, it is not suitable for thermal management, and it is detected whether the engine frequently enters or exits the heating mode.
Optionally, before the inlet temperature of the selective catalytic reduction device within the first preset time period is acquired from the inlet temperature sensor, whether the inlet temperature sensor is in fault or not can be determined, so that the condition of the engine is prevented from being influenced by the fault of the inlet temperature sensor.
In step S202, an increasing temperature sequence of increasing temperature and a decreasing temperature sequence of decreasing temperature in each inlet temperature are determined.
In this embodiment, as shown in fig. 6, the inlet temperature will continue to increase when the engine is in the heating mode, and will vary with vehicle conditions, but generally will tend to decrease, when the engine exits the heating mode. Thus, there are a plurality of increasing temperature sequences of increasing temperature and decreasing temperature sequences of decreasing temperature in the inlet temperature within the first preset time period.
Step S203, determining the number of incremental temperature sequences in each incremental temperature sequence, where one of the adjacent inlet temperatures is within a preset initial thermal management temperature threshold range and the other inlet temperature is greater than or equal to the maximum value in the preset initial thermal management temperature threshold range.
In the present embodiment, when the thermal management is performed, if the inlet temperature is in a state of continuously increasing, the engine is controlled to exit the heating mode when the inlet temperature reaches the maximum value of the thermal management temperature threshold range. Thus, in each incremental temperature sequence, there is an incremental temperature sequence number of adjacent inlet temperatures where one of the inlet temperatures is within the preset initial thermal management temperature threshold range and the other inlet temperature is greater than or equal to the maximum value in the preset initial thermal management temperature threshold range, i.e., the number of times the engine exits the heating mode. Such as a preset initial thermal management temperature threshold range of 250-270 c with two increasing temperature sequences for a first preset time period. The first increasing temperature sequence is 230-285 ℃, the second increasing temperature sequence is 190-240 ℃, and the number of times that the engine exits the heating mode is 1.
Step S204, determining the number of the decreasing temperature sequences in which one of the adjacent inlet temperatures is within a preset initial thermal management temperature threshold range and the other inlet temperature is smaller than the minimum value in the preset initial thermal management temperature threshold range.
In the present embodiment, when the thermal management is performed, if the inlet temperature is in a state of continuously decreasing, the engine is controlled to exit the heating mode when the inlet temperature decreases to the minimum value of the thermal management temperature threshold range. Thus, in each decreasing temperature sequence, the number of decreasing temperature sequences in which one of the adjacent inlet temperatures is within the preset initial thermal management temperature threshold range and the other inlet temperature is less than the minimum value of the preset initial thermal management temperature threshold range represents the number of times the engine exits the heating mode. For example, the preset initial thermal management temperature threshold range is 250-270 ℃, and the first preset time period has two descending temperature sequences. The first decreasing temperature sequence is 255-200 ℃, the second decreasing temperature sequence is 260-255 ℃, and the times of the engine exiting the heating mode are 1. When exiting the heating mode, if the inlet temperature begins to rise, the engine enters the heating mode.
By dividing the inlet temperature into a plurality of increasing temperature sequences and decreasing temperature sequences and determining the number of the temperature sequences corresponding to the preset requirement, the number of times of actually entering and exiting the heating mode of the engine can be more accurately determined, and thus the frequency of the entering and exiting of the heating mode of the engine can be determined.
Optionally, in this embodiment, before determining the number of temperature pairs in which one of the adjacent inlet temperatures is within the preset initial thermal management temperature threshold range and the other inlet temperature is outside the thermal management temperature threshold range, the method further includes:
and determining the average temperature of each inlet temperature, and judging whether the average temperature is within a preset temperature threshold range.
And if the average temperature is within a preset temperature threshold range, determining the logarithm of the temperature of one of the adjacent inlet temperatures within the preset initial thermal management temperature threshold range and the logarithm of the temperature of the other inlet temperature outside the thermal management temperature threshold range.
In this embodiment, when the engine frequently enters or exits the heating mode, the inlet temperature will also be in the vicinity of the preset temperature threshold range, and at this time, the average temperature of each inlet temperature will be in a certain range. Therefore, whether the engine is in a state of frequently entering or exiting thermal management can be further determined by judging whether the average temperature is in the preset temperature threshold range, and the accuracy of determining the engine state is improved.
In step S205, the sum of each number of increasing temperature sequences and each number of decreasing temperature sequences is determined as a temperature pair number.
In this embodiment, determining the sum of each incremental temperature sequence number and each incremental temperature sequence number as the temperature pair number may provide a basis for subsequently determining the engine state.
In step S206, it is determined whether the number of temperature pairs is greater than or equal to a preset temperature pair threshold. If so, go to step 207, otherwise go to step 201.
In this embodiment, the implementation manner of step 206 is similar to that of step 103 in the previous embodiment of the present invention, and is not described in detail here.
Step S207, the temperatures at both ends of the initial thermal management temperature threshold range are respectively increased by preset adjustment thresholds, so that the number of temperature pairs in a second preset time period after the first preset time period is smaller than the temperature pair threshold.
In this embodiment, the temperatures at the two ends of the initial thermal management temperature threshold range are respectively increased by the preset adjustment threshold, so that the engine can be in the heating mode for a long time, and the problem of low catalytic reaction efficiency caused by low exhaust temperature can be further solved.
In this embodiment, assuming that the initial thermal management temperature threshold range is 180-200 ℃, the temperatures at the two ends of the initial thermal management temperature threshold range are 180 ℃ and 200 ℃. And assuming that the preset adjusting threshold is 50 ℃, respectively increasing the preset adjusting threshold, and then, adjusting the increased thermal management temperature threshold to be 230-250 ℃.
Optionally, in this embodiment, after the temperatures at the two ends of the thermal management temperature threshold range are respectively increased by the preset adjustment threshold, the method further includes:
the inlet temperature of the selective catalytic reducer is acquired from the inlet temperature sensor for a second preset time period after the first preset time period.
A number of pairs of temperatures in each of the adjacent inlet temperatures is determined, one of the inlet temperatures being within the adjusted thermal management temperature threshold range and the other inlet temperature being outside the thermal management temperature threshold range.
And if the temperature pair number is determined to be larger than or equal to the preset temperature pair threshold, increasing the thermal management temperature threshold range again according to the preset adjustment threshold.
And if the temperature pair number is smaller than the preset temperature pair threshold, recovering the initial thermal management temperature threshold range according to the thermal management temperature threshold range after the preset adjustment threshold is increased.
In this embodiment, after the initial thermal management temperature threshold range is adjusted, in order to determine whether the engine is still in the state of frequently entering or exiting the heating mode, the inlet temperature of the selective catalytic reduction device in the second period may be acquired, and a subsequent determination operation may be performed. If the engine is still in the state of frequently entering or exiting the heating mode in the second time period, the thermal management temperature threshold range can be increased again according to the preset adjustment threshold. If the engine is out of the state of frequently adding or exiting the heating mode, the adjusted thermal management temperature threshold range can be recovered to the initial thermal management temperature threshold range, so that the problems of reduction of internal combustion efficiency of the engine caused by adjustment of the thermal management temperature threshold range and increase of oil consumption caused by reduction of the combustion efficiency are solved.
Optionally, in this embodiment, before increasing the thermal management temperature threshold range according to the preset adjustment threshold again, the method further includes:
and determining whether the difference value between the adjusted thermal management temperature threshold range and the initial thermal management temperature threshold range is greater than or equal to a preset adjustment upper limit value.
And if the difference is larger than or equal to the preset adjustment upper limit value, maintaining the thermal management temperature threshold range unchanged.
And if the difference is smaller than the preset adjustment upper limit value, executing the step of increasing the thermal management temperature threshold range again according to the preset adjustment threshold value.
In this embodiment, when the thermal management temperature threshold range is adjusted, the thermal management temperature threshold range cannot be adjusted too high, and if the thermal management temperature threshold range is adjusted too high, the engine is in a heating state for a long time, so that greater oil consumption is increased. The preset adjustment upper limit value may be set according to actual requirements, which is not limited in this embodiment.
Optionally, in this embodiment, before restoring the initial thermal management temperature threshold range to the thermal management temperature threshold range after the thermal management temperature threshold range is increased according to the preset adjustment threshold, the method further includes:
maintaining the thermal management temperature threshold range unchanged for a third preset time period.
In this embodiment, maintaining the thermal management temperature threshold range constant for the third predetermined period of time takes into account that the actual operation of the engine may have exited the state of frequent entering or exiting the heating mode in view of changes in vehicle operating conditions after the third predetermined period of time. Therefore, the thermal management temperature threshold range is kept unchanged within the third preset time period before the thermal management temperature threshold range which is increased according to the preset adjustment threshold is restored to the initial thermal management temperature threshold range, and the situation that the engine frequently enters or exits the heating mode after the thermal management temperature threshold range which is increased according to the preset adjustment threshold is restored to the initial thermal management temperature threshold range can be avoided to a certain extent through the increased buffer time.
And S208, performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range.
In this embodiment, the implementation manner of step 208 is similar to that of step 104 in the previous embodiment of the present invention, and is not described in detail here.
In order to better understand the scheme of the embodiment, the connection relationship among the elements of the embodiment is shown in fig. 4, and the main execution body of the scheme is an engine control unit ECU. The system comprises an engine control unit ECU (electronic control Unit), an SCR (selective catalytic reduction) inlet temperature sensor 2, an SCR inlet temperature sensor 3, an SCR inlet temperature sensor 4 and a DPF inlet temperature sensor 5, a DPF, an SCR inlet temperature sensor 6 and a DOC inlet temperature sensor 7 and a DOC. The SCR inlet temperature sensor 2 measures the inlet temperature of the SCR3, the DPF inlet temperature sensor 4 measures the inlet temperature of the DPF5, and the DOC inlet temperature sensor 6 measures the inlet temperature of the DOC 7. The exhaust of the engine is sequentially treated by DOC-DPF-SCR and then discharged out of the vehicle through an exhaust tail pipe. The DOC diesel engine oxidation catalytic converter is provided with an oxidation catalyst, mainly used for eliminating CO and HC in tail gas and oxidizing NO into NO2, the DPF diesel engine particulate filter is mainly used for trapping particulate matters in the tail gas, and the SCR selective catalytic reducer is used for eliminating nitrogen oxides in the tail gas. The engine control unit ECU1 acquires the inlet temperature of the SCR3 through the inlet temperature sensor 2 of the SCR, so as to determine whether the engine is in a state of frequently entering or exiting thermal management, and adjust the corresponding thermal management temperature threshold range.
As shown in fig. 5, the inlet temperatures measured by the inlet temperature sensor 4 of the DPF and the inlet temperature sensor 6 of the DOC are high in coincidence with each other, and the influence of the DOC inlet temperature and the DOC inlet temperature on the exhaust temperature is low when the exhaust gas is treated by the two devices. The inlet temperature of the SCR and its relationship to the engine operating mode are shown in fig. 6. In FIG. 6, the upper line represents engine operating mode, the lower line represents SCR inlet temperature, and the Nor mode refers to normal mode. It can be seen from fig. 6 that the SCR temperature is continuously increasing when the engine is in the heating mode, while the SCR inlet temperature is continuously decreasing after a short delay when the engine is in the normal mode. When the SCR inlet temperature is lowered to a value below the minimum value of the thermal management temperature threshold range and is in an ascending state, the engine enters a heating mode again.
According to the vehicle thermal management control method, the inlet temperature is divided into a plurality of increasing temperature sequences and decreasing temperature sequences, and the number of the corresponding temperature sequences meeting the preset requirement is determined, so that the times of actually entering and exiting the heating mode of the engine can be more accurately determined, and the frequency of entering and exiting the heating mode of the engine can be determined. Meanwhile, providing a plurality of procedures for determining whether the engine is in the frequent entering or exiting heating mode can improve the accuracy of determining the engine state. And if the engine is out of the state of frequently adding or quitting the heating mode, the adjusted thermal management temperature threshold range is recovered to the initial thermal management temperature threshold range, so that the problems of reduction of internal combustion efficiency of the engine caused by adjustment of the thermal management temperature threshold range and increase of oil consumption caused by reduction of the combustion efficiency are solved.
Fig. 7 is a schematic structural diagram of a vehicle thermal management control apparatus according to a third embodiment of the present invention, and as shown in fig. 7, in this embodiment, a vehicle thermal management control apparatus 300 may be located in an electronic device. The vehicle thermal management control apparatus 300 includes:
an obtaining module 301 is configured to obtain an inlet temperature of the selective catalytic reduction device within a first preset time period from an inlet temperature sensor. The inlet temperatures were arranged in chronological order.
A temperature determination module 302 configured to determine a number of temperature pairs in each of the adjacent inlet temperatures, where one of the inlet temperatures is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the thermal management temperature threshold range.
An adjusting module 303, configured to adjust the initial thermal management temperature threshold range according to a preset adjusting threshold if it is determined that the number of temperature pairs is greater than or equal to a preset temperature pair threshold, so that the number of temperature pairs in a second preset time period after the first preset time period is less than the temperature pair threshold.
And the control module 304 is used for performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range.
The vehicle thermal management control device provided in this embodiment may execute the technical solution of the method embodiment shown in fig. 2, and the implementation principle and the technical effect of the vehicle thermal management control device are similar to those of the method embodiment shown in fig. 2, and are not described in detail here.
Meanwhile, the vehicle thermal management control device provided by the invention further refines the vehicle thermal management control device 300 on the basis of the vehicle thermal management control device provided by the previous embodiment.
Optionally, in this embodiment, the temperature determining module 302 is specifically configured to:
an increasing temperature sequence of increasing temperatures and a decreasing temperature sequence of decreasing temperatures for each inlet temperature are determined. Determining that the number of the incremental temperature sequences exists in each incremental temperature sequence, wherein one of the adjacent inlet temperatures is within the preset initial thermal management temperature threshold range, and the other inlet temperature is greater than or equal to the maximum value in the preset initial thermal management temperature threshold range. And determining the number of the descending temperature sequences with one of the adjacent inlet temperatures being in the preset initial thermal management temperature threshold range and the other inlet temperature being smaller than the minimum value in the preset initial thermal management temperature threshold range in each descending temperature sequence. The sum of each increasing temperature sequence number and each decreasing temperature sequence number is determined as a temperature pair number.
Optionally, in this embodiment, when the adjusting module 303 adjusts the initial thermal management temperature threshold range according to a preset adjustment threshold, the adjusting module is specifically configured to:
and respectively increasing the temperatures at the two ends of the initial thermal management temperature threshold range by preset adjustment thresholds.
Optionally, in this embodiment, the adjusting module 303 is further configured to:
an inlet temperature of the selective catalytic reducer is obtained from the inlet temperature sensor for a second preset time period after the first preset time period. Determining a number of temperature pairs in each of the adjacent inlet temperatures, one of the inlet temperatures being within the adjusted thermal management temperature threshold range and the other of the inlet temperatures being outside the thermal management temperature threshold range. And if the temperature pair number is larger than or equal to the preset temperature pair threshold, increasing the thermal management temperature threshold range again according to the preset adjustment threshold. And if the temperature logarithm quantity is smaller than the preset temperature pair threshold value, recovering the initial thermal management temperature threshold value range according to the thermal management temperature threshold value range after the preset adjustment threshold value is increased.
Optionally, in this embodiment, the adjusting module 303 is further configured to:
and determining whether the difference value between the adjusted thermal management temperature threshold range and the initial thermal management temperature threshold range is greater than or equal to a preset adjustment upper limit value. And if the difference is larger than or equal to the preset adjustment upper limit value, maintaining the thermal management temperature threshold range unchanged. And if the difference is smaller than the preset adjustment upper limit value, executing the step of increasing the thermal management temperature threshold range again according to the preset adjustment threshold value.
Optionally, in this embodiment, the adjusting module 303 is further configured to:
maintaining the thermal management temperature threshold range unchanged for a third preset time period.
Optionally, in this embodiment, the vehicle thermal management control apparatus 300 further includes:
and the judging module is used for determining the average temperature of each inlet temperature and judging whether the average temperature is in a preset temperature threshold range. And if the average temperature is within a preset temperature threshold range, determining the logarithm of the temperature of one of the adjacent inlet temperatures within the preset initial thermal management temperature threshold range and the logarithm of the temperature of the other inlet temperature outside the thermal management temperature threshold range.
The vehicle thermal management control apparatus 300 further includes:
a vehicle condition determination module obtains an engine speed and a current inlet temperature of the selective catalytic reducer from an inlet temperature sensor. It is determined whether the engine speed is greater than a preset speed threshold and the current inlet temperature is greater than a preset temperature threshold. And if the engine speed is greater than the preset speed threshold and the current inlet temperature is greater than the preset temperature threshold, executing a step of acquiring the inlet temperature of the catalytic reducer within a first preset time period from the inlet temperature sensor.
The vehicle thermal management control apparatus provided in this embodiment may execute the technical solutions of the method embodiments shown in fig. 2 to fig. 6, and the implementation principle and the technical effects are similar to those of the method embodiments shown in fig. 2 to fig. 6, which are not described in detail herein.
The invention also provides an electronic device, a computer readable storage medium and a computer program product according to the embodiments of the invention.
As shown in fig. 8, fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention. The electronic device is intended to be various electronic devices that can be used as an engine control unit, such as a microcomputer, a single-chip microcomputer, and other suitable computers. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 8, the electronic apparatus includes: a processor 401, a memory 402. The various components are interconnected using different buses and may be mounted on a common motherboard or in other manners as desired. The processor may process instructions for execution within the electronic device.
The memory 402 is a non-transitory computer readable storage medium provided by the present invention. The memory stores instructions executable by the at least one processor to cause the at least one processor to perform the vehicle thermal management control method provided by the invention. The non-transitory computer-readable storage medium of the present invention stores computer instructions for causing a computer to execute the vehicle thermal management control method provided by the present invention.
Memory 402, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules corresponding to the vehicle thermal management control method in embodiments of the invention (e.g., acquisition module 301, temperature determination module 302, adjustment module 303, and control module 304 shown in fig. 7). The processor 401 executes various functional applications and data processing of the electronic device by executing non-transitory software programs, instructions and modules stored in the memory 402, so as to implement the vehicle thermal management control method in the above method embodiment.
Meanwhile, the embodiment also provides a computer product, and when instructions in the computer product are executed by a processor of the electronic device, the electronic device is enabled to execute the vehicle thermal management control method of the first embodiment and the second embodiment.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the embodiments of the invention following, in general, the principles of the embodiments of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the embodiments of the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of embodiments of the invention being indicated by the following claims.
It is to be understood that the embodiments of the present invention are not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of embodiments of the invention is limited only by the claims that follow.

Claims (10)

1. A vehicle thermal management control method, comprising:
acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from an inlet temperature sensor; the inlet temperatures are arranged in chronological order;
determining the number of temperature pairs of which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the initial thermal management temperature threshold range in each adjacent inlet temperature;
if the temperature pair number is determined to be greater than or equal to a preset temperature pair threshold, adjusting the initial thermal management temperature threshold range according to a preset adjustment threshold, so that the temperature pair number in a second preset time period after the first preset time period is smaller than the temperature pair threshold;
and performing thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range.
2. The method of claim 1, wherein said determining a number of temperature pairs for each adjacent one of said inlet temperatures that is within a preset initial thermal management temperature threshold and the other inlet temperature that is outside of a thermal management temperature threshold comprises:
determining an increasing temperature sequence of increasing temperatures and a decreasing temperature sequence of decreasing temperatures for each of the inlet temperatures;
determining the number of the incremental temperature sequences with one of the adjacent inlet temperatures being in a preset initial thermal management temperature threshold range and the other inlet temperature being greater than or equal to the maximum value in the preset initial thermal management temperature threshold range in each incremental temperature sequence;
determining the number of the decreasing temperature sequences, wherein one of the adjacent inlet temperatures is in a preset initial thermal management temperature threshold range and the other inlet temperature is smaller than the minimum value in the preset initial thermal management temperature threshold range, in each decreasing temperature sequence;
determining a sum of each of the increasing temperature series quantities and each of the decreasing temperature series quantities as the temperature pair quantity.
3. The method of claim 2, wherein said adjusting said initial thermal management temperature threshold range according to a preset adjustment threshold comprises:
and respectively increasing the temperatures at the two ends of the initial thermal management temperature threshold range by preset adjustment thresholds.
4. The method of claim 3, wherein after the adjusting the temperatures at the two ends of the thermal management temperature threshold range respectively higher than the preset adjustment threshold, further comprising:
acquiring the inlet temperature of the selective catalytic reducer in a second preset time period after the first preset time period from the inlet temperature sensor;
determining the number of temperature pairs of which one inlet temperature is in the adjusted thermal management temperature threshold range and the other inlet temperature is out of the thermal management temperature threshold range in each adjacent inlet temperature;
if the temperature logarithm quantity is determined to be larger than or equal to a preset temperature logarithm threshold, increasing the thermal management temperature threshold range again according to a preset adjustment threshold;
and if the temperature logarithm quantity is determined to be smaller than the preset temperature pair threshold, recovering the initial thermal management temperature threshold range according to the thermal management temperature threshold range after the preset adjustment threshold is increased.
5. The method of claim 4, wherein before the increasing the thermal management temperature threshold range again according to the preset adjustment threshold, further comprising:
determining whether the difference value between the adjusted thermal management temperature threshold range and the initial thermal management temperature threshold range is greater than or equal to a preset adjustment upper limit value;
if the difference is larger than or equal to a preset adjustment upper limit value, maintaining the range of the thermal management temperature threshold value unchanged;
and if the difference is smaller than the preset adjustment upper limit value, executing the step of increasing the thermal management temperature threshold range again according to the preset adjustment threshold value.
6. The method of claim 4, wherein before restoring the thermal management temperature threshold range adjusted to the preset adjustment threshold to the initial thermal management temperature threshold range, further comprising:
maintaining the thermal management temperature threshold range constant for a third preset time period.
7. The method of any of claims 1 to 6, wherein prior to determining the number of temperature pairs for which one of the adjacent inlet temperatures is within a preset initial thermal management temperature threshold and the other inlet temperature is outside the thermal management temperature threshold, further comprising:
determining the average temperature of each inlet temperature, and judging whether the average temperature is within a preset temperature threshold range;
if the average temperature is within a preset temperature threshold range, executing the step of determining the logarithm of the temperature of one of the adjacent inlet temperatures within a preset initial thermal management temperature threshold range and the logarithm of the temperature of the other inlet temperature outside the thermal management temperature threshold range;
before the step of obtaining the inlet temperature of the selective catalytic reduction device in the first preset time period from the inlet temperature sensor, the method further comprises the following steps:
acquiring the engine speed and the current inlet temperature of the selective catalytic reducer from the inlet temperature sensor;
determining whether the engine speed is greater than a preset speed threshold and whether the current inlet temperature is greater than a preset temperature threshold;
and if the engine rotating speed is greater than a preset rotating speed threshold value and the current inlet temperature is greater than a preset temperature threshold value, executing the step of acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from the inlet temperature sensor.
8. A vehicle thermal management control apparatus, characterized by comprising:
the acquisition module is used for acquiring the inlet temperature of the selective catalytic reduction device in a first preset time period from the inlet temperature sensor; the inlet temperatures are arranged in chronological order;
the temperature determination module is used for determining the number of temperature pairs of which one inlet temperature is within a preset initial thermal management temperature threshold range and the other inlet temperature is outside the thermal management temperature threshold range in each adjacent inlet temperature;
an adjusting module, configured to adjust the initial thermal management temperature threshold range according to a preset adjusting threshold if it is determined that the temperature logarithm quantity is greater than or equal to a preset temperature pair threshold, so that the temperature logarithm quantity in a second preset time period after the first preset time period is smaller than the temperature pair threshold;
and the control module is used for carrying out thermal management control on the vehicle engine according to the adjusted thermal management temperature threshold range.
9. An electronic device, comprising: a memory, a processor;
a memory; a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the vehicle thermal management control method of any of claims 1 to 7 by the processor.
10. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, implement a vehicle thermal management control method according to any one of claims 1 to 7.
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