CN112343691A - Method and equipment for quitting thermal management control - Google Patents
Method and equipment for quitting thermal management control Download PDFInfo
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- CN112343691A CN112343691A CN202011174020.2A CN202011174020A CN112343691A CN 112343691 A CN112343691 A CN 112343691A CN 202011174020 A CN202011174020 A CN 202011174020A CN 112343691 A CN112343691 A CN 112343691A
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- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
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- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
- F01N11/005—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus the temperature or pressure being estimated, e.g. by means of a theoretical model
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- 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
- Y02T10/40—Engine management systems
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Abstract
The invention relates to the field of electronic equipment, and discloses a quit heat management control method and equipment, wherein the quit heat management control method comprises the following steps: when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value; judging whether a conversion condition is met or not according to the actual value of the exhaust temperature; when the actual value of the exhaust temperature meets the conversion condition, recording the duration of the actual value of the exhaust temperature; converting the duration of the actual value of the exhaust temperature into target exhaust temperature duration according to a preset rule; acquiring a duration average target value of the thermal management mode; and comparing the target temperature-discharging duration with the average target value of the duration, and judging whether to exit the thermal management mode. The method is used for improving the accuracy of judging the thermal management exit.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a quitting heat management control method and equipment.
Background
At present, heat management is carried out by means of blocking an air inlet throttle valve and opening a post-injection valve to improve exhaust temperature, and when the duration of the exhaust temperature which is greater than a certain temperature threshold exceeds the target exhaust temperature duration, the heat management is quitted. This results in that below the temperature threshold all are invalid and cannot be counted. However, within a certain deviation range, the actual exhaust temperature is valuable. Therefore, considering exhaust temperatures below the temperature threshold as invalid makes the statistics of thermal management time less accurate.
Disclosure of Invention
The invention discloses a quit thermal management control method and equipment, which are used for improving the accuracy of judging thermal management quit.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for exiting thermal management control, including:
when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value;
judging whether a conversion condition is met or not according to the actual value of the exhaust temperature;
when the actual value of the exhaust temperature meets the conversion condition, recording the duration of the actual value of the exhaust temperature;
converting the duration of the actual value of the exhaust temperature into target exhaust temperature duration according to a preset rule;
acquiring a duration average target value of the thermal management mode;
and comparing the target temperature-discharging duration with the average target value of the duration, and judging whether to exit the thermal management mode.
Based on the technical scheme, when the scheme provided by the embodiment of the invention is executed, if the fact that the engine runs in the heat management mode is detected, the actual value of the current exhaust temperature is obtained firstly; then judging whether the current exhaust temperature actual value meets the conversion condition, and recording the duration of the exhaust temperature actual value when the current exhaust temperature actual value meets the conversion condition; then converting the duration of the actual value of the exhaust temperature into the target exhaust temperature duration according to a preset rule; when the engine is judged to enter the heat management mode, acquiring an average target value of the duration; and finally, comparing the target exhaust temperature duration with the average target value of the duration, and judging whether to exit the thermal management mode, specifically, when the target exhaust temperature duration is greater than or equal to the average target value of the duration, exiting the thermal management mode by the engine. It can be seen that the actual exhaust temperature, i.e. the actual value of the exhaust temperature, deviates from the expected value, and within a certain deviation range, the actual value of the exhaust temperature is valuable, but the value needs to be discounted relative to the expected value, and the duration of the actual value of the exhaust temperature is converted into the target duration of the exhaust temperature by the preset rule, and is invalid if the deviation exceeds the allowable deviation range. Therefore, the problem that the effective temperature is mistakenly processed as invalid is avoided, the statistics on the heat management time is more accurate, the system requirements are better met, and the loss caused by inaccurate judgment of heat management quitting under the actual environment use is avoided.
Optionally, the converting the duration of the actual value of the exhaust temperature into the target exhaust temperature duration according to a preset rule includes:
dividing a temperature range meeting the conversion condition into a plurality of intervals, and presetting a conversion coefficient matched with each interval;
judging the interval position of the actual value of the exhaust temperature, and determining a conversion coefficient according to the interval position;
and obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient.
Optionally, obtaining a target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient includes:
and multiplying and accumulating the duration of the actual value of the exhaust temperature and the determined conversion coefficient to obtain the target exhaust temperature duration.
Optionally, the plurality of intervals include a first interval, a second interval and a third interval, and conversion coefficients corresponding to the first interval, the second interval and the third interval are increased progressively; wherein:
the temperature range of the first interval is 240-300 ℃;
the temperature range of the second interval is 300-350 ℃;
the temperature range of the third interval is 350-400 ℃.
Optionally, the conversion coefficient matching the first interval is 0.8;
the conversion coefficient matched with the second interval is 1;
the conversion factor matched with the third interval was 1.2.
Optionally, the obtaining the average target value of the duration of the thermal management mode includes:
when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and obtaining the average target value of the duration of the thermal management mode according to the integral value and the integral times.
Optionally, the operating parameter comprises rotational speed and/or torque.
In a second aspect, an embodiment of the present invention further provides an exit thermal management control apparatus, including: a processor and a memory, wherein the memory stores program code that, when executed by the processor, causes the processor to:
when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value;
judging whether a conversion condition is met or not according to the actual value of the exhaust temperature;
when the conversion condition is met, recording the duration of the actual value of the exhaust temperature;
converting the duration of the actual value of the exhaust temperature into target exhaust temperature duration according to a preset rule;
acquiring an average target value of the duration of the thermal management mode;
and comparing the target temperature-discharging duration with the average target value of the duration, and judging whether to exit the thermal management mode.
Optionally, the memory is further configured to store a temperature range satisfying the conversion condition;
the processor is further configured to:
dividing a temperature range meeting the conversion condition into a plurality of intervals, and presetting a conversion coefficient matched with each interval;
judging the interval position of the actual value of the exhaust temperature, and determining a conversion coefficient according to the interval position;
and obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient.
Optionally, the processor is further configured to: and multiplying and accumulating the duration of the actual value of the exhaust temperature and the determined conversion coefficient to obtain the target exhaust temperature duration.
Optionally, the plurality of intervals include a first interval, a second interval and a third interval, and conversion coefficients corresponding to the first interval, the second interval and the third interval are increased progressively; wherein:
the temperature range of the first interval is 240-300 ℃;
the temperature range of the second interval is 300-350 ℃;
the temperature range of the third interval is 350-400 ℃.
Optionally, the conversion coefficient matching the first interval is 0.8;
the conversion coefficient matched with the second interval is 1;
the conversion factor matched with the third interval was 1.2.
Optionally, the memory is further configured to: and storing the MAP graph and the CUR graph calibrated in advance.
Optionally, the processor is further configured to:
when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and obtaining the average target value of the duration of the thermal management mode according to the integral value and the integral times.
Optionally, the operating parameter comprises rotational speed and/or torque.
In a third aspect, an embodiment of the present invention further provides an exit thermal management control device, including:
the exhaust temperature actual value acquisition module is used for acquiring a current exhaust temperature actual value when the engine runs in a thermal management mode;
the conversion determining module is used for judging whether the actual value of the exhaust temperature meets the conversion condition;
the duration recording module is used for recording the duration of the actual value of the exhaust temperature;
the conversion module is used for converting the duration of the actual value of the exhaust temperature into the duration of the target exhaust temperature according to a preset rule;
the average target value of the duration obtains the module, is used for obtaining the average target value of the duration of the said heat management mode when the engine runs in the heat management mode;
and the exit condition judgment module is used for comparing the target temperature exhaust duration with the average target value of the duration and judging whether to exit the thermal management mode.
Optionally, the conversion module is further configured to:
dividing the temperature limit range into a plurality of intervals, and presetting a conversion coefficient matched with each interval;
judging the interval position of the actual value of the exhaust temperature, and determining a conversion coefficient according to the interval position;
and obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient.
Optionally, the conversion module is further configured to:
and multiplying and accumulating the duration of the actual value of the exhaust temperature and the determined conversion coefficient to obtain the target exhaust temperature duration.
Optionally, the plurality of intervals include a first interval, a second interval and a third interval, and conversion coefficients corresponding to the first interval, the second interval and the third interval are increased progressively; wherein:
the temperature range of the first interval is 240-300 ℃;
the temperature range of the second interval is 300-350 ℃;
the temperature range of the third interval is 350-400 ℃.
Optionally, the conversion coefficient matching the first interval is 0.8;
the conversion coefficient matched with the second interval is 1;
the conversion factor matched with the third interval was 1.2.
Optionally, the duration average target value obtaining module is further configured to:
when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and obtaining the average target value of the duration of the thermal management mode according to the integral value and the integral times.
Optionally, the operating parameter comprises rotational speed and/or torque.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the step of exiting the thermal management control method in any one of the first aspect is implemented.
Drawings
Fig. 1 is a schematic flowchart of an exit thermal management control method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of S104 in FIG. 1;
FIG. 3 is a schematic flow chart of S105 in FIG. 1;
FIG. 4 is a flowchart illustrating another exit thermal management control method according to an embodiment of the present invention;
fig. 5 is a block diagram of an exit thermal management control device according to an embodiment of the present invention;
fig. 6 is a block diagram of another exit thermal management control device according to an embodiment of the present invention.
Icon: 501, a processor; 502-a memory; 601-an exhaust temperature actual value obtaining module; 602-a conversion determination module; 603-duration recording module; 604-a transformation module; 605-a duration average target value obtaining module; 606-exit condition determination module.
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.
As shown in fig. 1, an embodiment of the present invention provides an exit thermal management control method, including the following steps:
and S101, when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value.
In one embodiment, if it is detected that the engine is operating in a thermal management mode, the current exhaust temperature actual value is first obtained.
And S102, judging whether the conversion condition is met or not according to the actual value of the exhaust temperature.
In one embodiment, after the current exhaust temperature actual value is obtained, the current exhaust temperature actual value is compared with a temperature range meeting the conversion condition, and whether the exhaust temperature actual value falls within the temperature range is judged. For example, the temperature range of the conversion condition is 240 ℃ to 400 ℃, and whether the current exhaust temperature actual value obtained in the above S101 falls within the temperature range is determined, and if the exhaust temperature actual value is 230 ℃, it is determined that the current exhaust temperature does not satisfy the conversion condition, and it is regarded as invalid; and if the actual value of the exhaust temperature is 250 ℃, judging that the current exhaust temperature meets the conversion condition.
And S103, recording the duration of the actual value of the exhaust temperature when the actual value of the exhaust temperature meets the conversion condition.
In one embodiment, the duration of the actual value of the exhaust temperature is recorded after it is determined that the actual value of the exhaust temperature satisfies the conversion condition.
And S104, converting the duration of the actual value of the exhaust temperature into the target exhaust temperature duration according to a preset rule.
In one embodiment, the actual value of the exhaust temperature deviates from the expected value within a certain deviation range, and the value is only discounted relative to the expected value, and the deviation beyond the allowable deviation range is invalid. Therefore, when the actual value of the exhaust temperature is within the temperature range of the conversion condition, the duration of the recorded actual value of the exhaust temperature is converted into the target exhaust temperature duration according to the preset rule. The predetermined rule is predetermined, for example, by an equivalent transformation factor. Therefore, the problem that the effective temperature is mistakenly processed as invalid is avoided, the statistics on the heat management time is more accurate, the system requirements are better met, and the loss caused by inaccurate judgment of heat management quitting under the actual environment use is avoided.
S105, obtaining an average target value of the duration of the thermal management mode;
in one embodiment, when the engine is started, when the engine is judged to enter the thermal management mode, firstly, a counter is triggered, and an average target value of the duration of the thermal management mode is obtained and used as a control requirement of the duration of the thermal management.
And S106, comparing the target temperature-discharging duration with the average target value of the duration, and judging whether to exit the thermal management mode.
In one embodiment, the target exhaust temperature duration is compared with the duration average target value to determine whether to exit the thermal management mode, and specifically, when the target exhaust temperature duration is greater than or equal to the duration average target value, the engine exits the thermal management mode.
Specifically, the following description is made with respect to S104 in the above exit thermal management control method:
as shown in fig. 2, converting the duration of the actual value of the exhaust temperature into the target exhaust temperature duration according to the preset rule includes the following steps:
s201, dividing a temperature range meeting the conversion condition into a plurality of intervals, and presetting a conversion coefficient matched with each interval.
In one embodiment, the temperature range satisfying the conversion condition is divided into a plurality of intervals, and the conversion coefficient matching each interval is preset, for example, the temperature range of the conversion condition is 240 ℃ to 400 ℃, the temperature range is divided into a plurality of intervals, calibration is performed for each interval, and the conversion coefficient corresponding to each interval is determined.
Illustratively, the temperature range meeting the conversion condition is divided into three intervals, namely a first interval, a second interval and a third interval, and the conversion coefficients corresponding to the first interval, the second interval and the third interval are increased progressively; wherein: the temperature range of the first interval is 240-300 ℃; the temperature range of the second interval is 300-350 ℃; the temperature in the third zone ranges from 350 ℃ to 400 ℃.
Illustratively, the temperature range of each interval is calibrated, and a corresponding conversion coefficient is given to each interval so as to match different application scenes. Namely the transformation coefficient matched with the first interval is 0.8; the conversion coefficient matched with the second interval is 1; the conversion factor matched to the third interval was 1.2. Different exhaust temperature duration times are standardized to be target exhaust temperature duration times by endowing a certain time conversion coefficient.
S202, judging the interval position of the actual value of the exhaust temperature, and determining the conversion coefficient according to the interval position.
In one embodiment, the actual value of the exhaust temperature is compared with the temperature range of each interval, the position of the interval where the actual value of the exhaust temperature is located is determined, and the corresponding conversion coefficient is searched according to the position of the interval. For example: judging whether the actual value of the exhaust temperature is more than or equal to 240 ℃ and less than 300 ℃, if so, determining that the conversion coefficient is 0.8, otherwise, continuing to judge; judging whether the actual value of the exhaust temperature is more than or equal to 300 ℃ and less than 350 ℃, if so, determining that the conversion coefficient is 1, otherwise, continuously judging whether the actual value of the exhaust temperature is more than or equal to 240 ℃ and less than 300 ℃; and judging whether the actual value of the exhaust temperature is greater than or equal to 350 ℃ and less than 400 ℃, if so, determining that the conversion coefficient is 1.2, otherwise, continuously judging whether the actual value of the exhaust temperature is greater than or equal to 240 ℃ and less than 300 ℃, or continuously judging whether the actual value of the exhaust temperature is greater than or equal to 300 ℃ and less than 350 ℃. It should be noted that all three determinations can be performed in parallel.
S203, obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient.
In S203, obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient specifically includes:
and multiplying and accumulating the duration of the actual exhaust temperature value and the determined conversion coefficient to obtain target exhaust temperature duration, and accumulating the target exhaust temperature durations converted by a plurality of different actual exhaust temperature values by adopting a timer to obtain the final target exhaust temperature duration. Thus, the time constant DT accumulated for each step of the timer is multiplied by a different conversion factor. And standardizing different exhaust temperature duration times to be the target exhaust temperature duration time.
Specifically, the following description is made with respect to S105 in the above exit thermal management control method:
as shown in fig. 3, obtaining the average target value of the duration of the thermal management mode includes the following steps:
s301, when the engine runs in a heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
s302, searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
s303, integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and S304, obtaining the average target value of the duration of the thermal management mode according to the integral value and the integration times.
Optionally, the operating parameter comprises rotational speed and/or torque.
In one embodiment, the MAP is looked up according to the rotating speed and the torque to obtain an exhaust temperature target value, the CUR is set based on the exhaust temperature target value, the CUR is calibrated under a Normal state, and the CUR is looked up to obtain a duration expected value.
And starting the engine, when the engine is judged to enter a thermal management mode, firstly triggering a counter, integrating the expected value of the duration of the target temperature, then dividing the integral value by the number of integration times (the counter) to obtain the average target value of the duration of the thermal management mode, wherein the average target value is used as the control requirement of the duration of the thermal management mode, and if the actual duration is more than or equal to the average target value of the duration, the thermal management is exited. And clearing the integrator and the counter.
A weighted average (integration before averaging) for the duration of different target temperatures is shown in table 1, for example:
TABLE 1
In order to make the solution provided by the embodiment of the present invention easier to understand, the exit thermal management control flow provided by the embodiment of the present invention is described in detail below by a specific embodiment. As shown in fig. 4, the process includes the following steps:
s401, when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value;
s402, judging whether the actual value of the exhaust temperature is more than or equal to 240 ℃ and less than 300 ℃; if yes, executing S403; otherwise, executing S401;
s403, recording the duration of the actual value of the exhaust temperature, converting the duration of the actual value of the exhaust temperature multiplied by a conversion coefficient of 0.8 into a target exhaust temperature duration, and executing S408;
s404, judging whether the actual value of the exhaust temperature is more than or equal to 300 ℃ and less than 350 ℃; if yes, go to S405; otherwise, executing S401;
s405, recording the duration of the actual value of the exhaust temperature, converting the duration of the actual value of the exhaust temperature multiplied by a conversion coefficient 1 into a target exhaust temperature duration, and executing S408;
s406, judging whether the actual value of the exhaust temperature is more than or equal to 350 ℃ and less than 400 ℃; if yes, executing S407; otherwise, executing S401;
s407, recording the duration of the actual value of the exhaust temperature, converting the duration of the actual value of the exhaust temperature multiplied by a conversion coefficient 1.2 into a target exhaust temperature duration, and executing S408;
s408, accumulating the target temperature exhaust duration to obtain the target temperature exhaust duration;
s409, when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current rotating speed and torque of the engine to obtain a corresponding exhaust temperature target value;
s410, searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
s411, integrating the expected value of the duration to obtain an integral value, and recording the integration times;
s412, obtaining an average target value of the duration of the thermal management mode according to the integral value and the integration times;
s413, judging whether the target temperature exhaust duration is larger than or equal to the average target value of the duration, if so, executing S414; otherwise, S413 is executed;
and S414, exiting the thermal management mode.
It should be noted that S402, S404, and S406 may all be parallel, and the target exhaust temperature duration converted in S403, S405, and S407 is all accumulated in S408 to obtain a final accumulated target exhaust temperature duration. S409 and S401 may be performed simultaneously. The target exhaust temperature duration in S413 is the target exhaust temperature duration finally accumulated in S408, the target exhaust temperature duration obtained in S408 is compared with the average target value of the duration obtained in S412, when the target exhaust temperature duration is greater than or equal to the average target value of the duration, the thermal management is exited, and the integrator counter is cleared.
The method for controlling the quit of the thermal management system is based on the same inventive concept, and the embodiment of the invention also provides the quit thermal management control equipment.
In a second aspect, as shown in fig. 5, an embodiment of the present invention further provides an exit thermal management control apparatus, including: a processor 501 and a memory 502, wherein the memory 502 stores program codes, and when the program codes are executed by the processor 501, the processor 501 executes the following processes:
when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value;
judging whether the conversion condition is met or not according to the actual value of the exhaust temperature;
when the conversion condition is met, recording the duration of the actual value of the exhaust temperature;
converting the duration of the actual value of the exhaust temperature into the target exhaust temperature duration according to a preset rule;
acquiring an average target value of the duration of the thermal management mode;
and comparing the target exhaust temperature duration with the average target value of the duration, and judging whether to exit the thermal management mode.
Optionally, the memory 502 is also used to store temperature ranges that meet the conversion condition;
the processor 501 is further configured to:
dividing the temperature range meeting the conversion condition into a plurality of intervals, and presetting a conversion coefficient matched with each interval;
judging the interval position of the actual value of the exhaust temperature, and determining a conversion coefficient according to the interval position;
and obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient.
Optionally, the processor 501 is further configured to: and multiplying and accumulating the duration of the actual value of the exhaust temperature and the determined conversion coefficient to obtain the target exhaust temperature duration.
Optionally, the plurality of intervals include a first interval, a second interval and a third interval, and the conversion coefficients corresponding to the first interval, the second interval and the third interval are increased progressively; wherein:
the temperature range of the first interval is 240-300 ℃;
the temperature range of the second interval is 300-350 ℃;
the temperature in the third zone ranges from 350 ℃ to 400 ℃.
Optionally, the conversion factor matched with the first interval is 0.8;
the conversion coefficient matched with the second interval is 1;
the conversion factor matched to the third interval was 1.2.
Optionally, the memory 502 is further configured to: and storing the MAP graph and the CUR graph calibrated in advance.
Optionally, the processor 501 is further configured to:
when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and obtaining the average target value of the duration of the thermal management mode according to the integral value and the integration times.
Optionally, the operating parameter comprises rotational speed and/or torque.
In a third aspect, as shown in fig. 6, an embodiment of the present invention further provides an exit thermal management control apparatus, including:
the actual exhaust temperature value acquiring module 601 is used for acquiring a current actual exhaust temperature value when the engine runs in the heat management mode;
a conversion determination module 602, configured to determine whether the actual value of the exhaust temperature meets a conversion condition;
a duration recording module 603 for recording the duration of the actual value of the exhaust temperature;
the conversion module 604 is configured to convert the duration of the actual value of the exhaust temperature into a target exhaust temperature duration according to a preset rule;
a duration average target value acquisition module 605 for acquiring a duration average target value for the thermal management mode when the engine is operating in the thermal management mode;
and an exit condition determining module 606, configured to compare the target exhaust temperature duration with the average target value of the duration, and determine whether to exit the thermal management mode.
Optionally, the conversion module 604 is further configured to:
dividing the temperature limit range into a plurality of intervals, and presetting a conversion coefficient matched with each interval;
judging the interval position of the actual value of the exhaust temperature, and determining a conversion coefficient according to the interval position;
and obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient.
Optionally, the conversion module 604 is further configured to:
and multiplying and accumulating the duration of the actual value of the exhaust temperature and the determined conversion coefficient to obtain the target exhaust temperature duration.
Optionally, the plurality of intervals include a first interval, a second interval and a third interval, and the conversion coefficients corresponding to the first interval, the second interval and the third interval are increased progressively; wherein:
the temperature range of the first interval is 240-300 ℃;
the temperature range of the second interval is 300-350 ℃;
the temperature in the third zone ranges from 350 ℃ to 400 ℃.
Optionally, the conversion factor matched with the first interval is 0.8;
the conversion coefficient matched with the second interval is 1;
the conversion factor matched to the third interval was 1.2.
Optionally, the duration average target value obtaining module 605 is further configured to:
when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and obtaining the average target value of the duration of the thermal management mode according to the integral value and the integration times.
Optionally, the operating parameter comprises rotational speed and/or torque.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the step of exiting the thermal management control method in any of the first aspects is implemented.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
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 (10)
1. A method of exit thermal management control, comprising:
when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value;
judging whether a conversion condition is met or not according to the actual value of the exhaust temperature;
when the actual value of the exhaust temperature meets the conversion condition, recording the duration of the actual value of the exhaust temperature;
converting the duration of the actual value of the exhaust temperature into target exhaust temperature duration according to a preset rule;
acquiring a duration average target value of the thermal management mode;
and comparing the target temperature-discharging duration with the average target value of the duration, and judging whether to exit the thermal management mode.
2. The exit thermal management control method according to claim 1, wherein the converting the duration of the actual value of the exhaust temperature into the target exhaust temperature duration according to a preset rule comprises:
dividing a temperature range meeting the conversion condition into a plurality of intervals, and presetting a conversion coefficient matched with each interval;
judging the interval position of the actual value of the exhaust temperature, and determining a conversion coefficient according to the interval position;
and obtaining the target exhaust temperature duration according to the duration of the actual exhaust temperature value and the determined conversion coefficient.
3. The exit thermal management control method according to claim 2, wherein obtaining a target exhaust temperature duration based on the duration of the actual value of the exhaust temperature and the determined conversion factor comprises:
and multiplying and accumulating the duration of the actual value of the exhaust temperature and the determined conversion coefficient to obtain the target exhaust temperature duration.
4. The exit thermal management control method according to claim 2, wherein the plurality of intervals includes a first interval, a second interval, and a third interval, and conversion coefficients corresponding to the first interval, the second interval, and the third interval are incremented; wherein:
the temperature range of the first interval is 240-300 ℃;
the temperature range of the second interval is 300-350 ℃;
the temperature range of the third interval is 350-400 ℃.
5. The exit thermal management control method of claim 4, wherein a conversion factor matching the first interval is 0.8;
the conversion coefficient matched with the second interval is 1;
the conversion factor matched with the third interval was 1.2.
6. The method of exiting thermal management control according to claim 1, wherein said obtaining an average target value for the duration of the thermal management mode comprises:
when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and obtaining the average target value of the duration of the thermal management mode according to the integral value and the integral times.
7. The exit thermal management control method of claim 6, wherein the operating parameter comprises a rotational speed and/or a torque.
8. An exit thermal management control device, comprising: a processor and a memory, wherein the memory stores program code that, when executed by the processor, causes the processor to:
when the engine runs in a thermal management mode, acquiring a current exhaust temperature actual value;
judging whether a conversion condition is met or not according to the actual value of the exhaust temperature;
when the actual value of the exhaust temperature meets the conversion condition, recording the duration of the actual value of the exhaust temperature;
converting the duration of the actual value of the exhaust temperature into target exhaust temperature duration according to a preset rule;
acquiring an average target value of the duration of the thermal management mode;
and comparing the target temperature-discharging duration with the average target value of the duration, and judging whether to exit the thermal management mode.
9. The exit thermal management control apparatus of claim 8, wherein the memory is further configured to: and storing the MAP graph and the CUR graph calibrated in advance.
10. The exit thermal management control apparatus of claim 9, wherein the processor is further configured to:
when the engine runs in the heat management mode, searching a pre-calibrated MAP (MAP) based on the current working parameters of the engine to obtain a corresponding exhaust temperature target value;
searching a pre-calibrated CUR diagram based on the exhaust temperature target value to obtain a duration expected value;
integrating the expected value of the duration to obtain an integral value, and recording the integration times;
and obtaining the average target value of the duration of the thermal management mode according to the integral value and the integral times.
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| CN114576027A (en) * | 2022-03-10 | 2022-06-03 | 潍柴动力股份有限公司 | Engine thermal management method, engine thermal management system and storage medium |
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