CN112065700A - Torque control method for compressor and storage medium - Google Patents
Torque control method for compressor and storage medium Download PDFInfo
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- CN112065700A CN112065700A CN202010918174.1A CN202010918174A CN112065700A CN 112065700 A CN112065700 A CN 112065700A CN 202010918174 A CN202010918174 A CN 202010918174A CN 112065700 A CN112065700 A CN 112065700A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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Abstract
The invention relates to the technical field of automobile control, in particular to a torque control method and a storage medium of a compressor. Collecting the running time of a compressor, the pressure of a refrigerant and the pressure change rate data of the refrigerant; based on the collected data, judging the working interval of the compressor through a pre-calibrated minimum time Limit of slow pressure build-up, a pressure change rate Limit _ R and a pressure Limit of a stable working area Limit _ P; when the compressor operates in different working intervals, different torque control strategies are adopted for torque control. When the gasoline engine idles, the compressor works normally from the attraction in the whole operation process, different torque control methods are adopted by combining the working characteristics of each working area, so that the torque control is more accurate, and the influence of the operation of the compressor on the engine rotating speed control and NVH (noise, vibration and harshness) is reduced.
Description
Technical Field
The invention relates to the technical field of automobile control, in particular to a torque control method and a storage medium of a compressor.
Background
With the development of automobile control technology, the torque control precision of various actuators is required to be higher and higher by an electric control unit. The swash plate type internal control variable displacement compressor is used by more and more vehicle types due to low cost and excellent performance. But the displacement of the swash plate type internal control variable displacement compressor is automatically adjusted, and a feedback device for displacement change is not provided. When the swash plate type variable displacement compressor works, particularly in the process of establishing the refrigerant pressure of an air conditioning system by initial operation after long-time standing, the electric control unit cannot know the variation of displacement and load, and the torque control is inaccurate. When the gasoline engine is in normal idling (the engine speed is stable and does not rise or fall any more), the torque of the compressor accounts for 30% -60% of the indicated torque of the whole engine, and the torque of the compressor is not controlled accurately, so that the idling speed of the engine fluctuates, and the NVH of the engine is seriously influenced.
Therefore, a reasonable control scheme needs to be considered and set, so that the torque control in the operation process of the swash plate type internal control variable displacement compressor is accurate when the gasoline engine idles.
Disclosure of Invention
The invention aims to provide a torque control method and a storage medium of a compressor, aiming at the defects of the prior art, when a gasoline engine is in idle speed, the compressor is in the whole operation process from attraction to normal operation, different torque control methods are adopted by combining the working characteristics of each working area, so that the torque control is more accurate, and the influence of the operation of the compressor on the engine speed control and NVH (noise vibration harshness) is reduced.
The invention discloses a torque control method of a compressor, which adopts the technical scheme that the torque control method comprises the following steps:
collecting the running time of a compressor, the pressure of a refrigerant and the pressure change rate data of the refrigerant;
based on the collected data, judging the working interval of the compressor through a pre-calibrated minimum time Limit of slow pressure build-up, a pressure change rate Limit _ R and a pressure Limit of a stable working area Limit _ P;
when the compressor operates in different working intervals, different torque control strategies are adopted for torque control.
Preferably, the working areas of the compressor comprise a slow pressure building area, a fast pressure building area and a stable working area.
Preferably, the determining the working interval of the compressor includes:
when the collected running time counted by starting the suction of the compressor is less than or equal to the Limit _ T, or the running time exceeds the Limit _ T, but the pressure of the refrigerant is less than the Limit _ P and the pressure change rate of the refrigerant is less than the Limit _ R, judging that the working interval where the compressor is located is a slow pressure building area;
when the change rate of the collected refrigerant pressure is greater than or equal to the Limit _ R and the refrigerant pressure is less than the Limit _ P, judging that the working interval where the compressor is located is a quick-build pressure area;
and judging that the working interval of the compressor is a stable working area from the time node when the collected refrigerant pressure is greater than or equal to the Limit _ P until the compressor stops running.
Preferably, starting from the instant of compressor pull-in, a constant torque Torq _ init is applied to the compressor for a period of time Delt _ t, and then the torque is reduced to 0Nm with a Rate slope.
Preferably, the slow pressure building zone, the fast pressure building zone and the stable working zone are respectively controlled by using formulas Torq _1 ═ k1 ═ P + b1, Torq _2 ═ k2 ═ P + b2 and Torq _3 ═ k3 ═ P + b 3;
wherein, P is the refrigerant pressure of the current working region, k1, k2 and k3 are the slopes of the fitting straight lines between the compressor torque and the refrigerant pressure in the slow pressure building region, the fast pressure building region and the stable working region respectively, and b1, b2 and b3 are the vertical intercepts of the fitting straight lines in the slow pressure building region, the fast pressure building region and the stable working region respectively;
wherein k1< k3< k 2.
More preferably, the formula Torq _1 ═ k1 ═ P + b1, Torq _2 ═ k2 ═ P + b2, and Torq _3 ═ k3 ═ P + b3 are obtained by pre-calibration, and the calibration includes:
through a compressor bench test, linear fitting is carried out on the relationship between the compressor torque and the pressure value in the slow pressure building region, the fast pressure building region and the stable working region respectively, and the torque control formula Torq _ 1-k 1-P + b1 of the slow pressure building region, the torque control formula Torq _ 2-k 2-P + b2 of the fast pressure building region and the torque control formula Torq _ 3-k 3-P + b3 of the stable working region are obtained.
Preferably, the Limit _ T, Limit _ R and the Limit _ P include multiple sets of data calibrated in advance at different ambient temperatures, and when the working interval of the compressor is determined, the working interval of the compressor is determined by using the Limit _ T, Limit _ R and the Limit _ P corresponding to the current ambient temperature.
Preferably, the calibration process of Limit _ T, Limit _ R and Limit _ P at different ambient temperatures includes:
selecting a temperature point within a set environment temperature range from T1 to T2, and acquiring a plurality of groups of test data including refrigerant pressure, refrigerant pressure change rate and compressor suction signals in a multi-test mode at the temperature;
drawing a plurality of curve graphs of the pressure of the refrigerant, the change rate of the pressure of the refrigerant and the change of a compressor suction signal along with time according to the obtained plurality of groups of test data;
respectively obtaining the time length t required by the pressure change rate after the compressor is sucked in each curve graph to reach the peak value for the first time, and comparing the time lengths t to obtain the maximum time length tmax2t is to bemaxThe minimum time Limit value Limit _ T of the slow voltage build-up is used;
will have a maximum duration tmaxThe graph of (2) is used as a reference graph, and the pressure change rate after a time threshold T1 set by the turning point delay time at which the pressure change rate starts to increase rapidly after the minimum time Limit _ T of the slow voltage build-up is taken as a pressure change rate Limit _ R;
dividing the lowest value of the refrigerant pressure in the multiple groups of test data by a preset coefficient after the refrigerant pressure is stabilized to be used as a stable working area pressure Limit value Limit _ P;
and sequentially selecting other temperature points in the set environment temperature range from T1 to T2 by taking T0 as a temperature interval, and repeating the operation to obtain the Limit _ T, Limit _ R and the Limit _ P of a plurality of temperature points in the set environment temperature range from T1 to T2.
Preferably, in the set environmental temperature interval T1-T2, the Limit _ T, Limit _ R and the Limit _ P of the remaining temperatures between the adjacent temperature points are obtained by performing linear interpolation on the Limit _ T, Limit _ R and the Limit _ P of the adjacent temperature points.
Preferably, the obtaining of the Limit _ T, Limit _ R and the Limit _ P for the temperature outside the set range of the ambient temperature T1 to T2 includes:
a temperature less than T1 with Limit _ T, Limit _ R and Limit _ P equal to Limit _ T, Limit _ R and Limit _ P at ambient temperature T1;
and the temperature is larger than T2, and the Limit _ T, Limit _ R and the Limit _ P of the temperature are equal to the Limit _ T, Limit _ R and the Limit _ P under the ambient temperature T2.
Preferably, selecting a temperature point, and obtaining a plurality of groups of test data including refrigerant pressure, refrigerant pressure change rate and compressor suction signal in a multi-test mode at the temperature includes:
immersing the whole air conditioning system at the temperature point until the refrigerant pressure of the high-low pressure pipeline of the air conditioning system reaches a balanced state;
the method comprises the following steps of (1) attracting a compressor when an engine reaches normal idling, and monitoring and recording test data including refrigerant pressure, refrigerant pressure change rate and compressor attraction signals in real time;
repeating the operation for multiple times to obtain multiple groups of test data.
The invention has the beneficial effects that: according to the working characteristics of the swash plate type internal control variable displacement compressor, the working area of the swash plate type internal control variable displacement compressor is divided into a slow pressure building area, a fast pressure building area and a stable working area. When the gasoline engine idles, the compressor works normally from the attraction in the whole operation process, different torque control methods are adopted by combining the working characteristics of each working area, so that the torque control is more accurate, and the influence of the operation of the compressor on the engine rotating speed control and NVH (noise, vibration and harshness) is reduced. The Limit _ T, Limit _ R and the Limit _ P are adopted to divide the slow pressure building area, the fast pressure building area and the stable working area, and the Limit _ T, Limit _ R and the Limit _ P corresponding to the temperatures are obtained through multiple tests at different temperatures, so that the division of the slow pressure building area, the fast pressure building area and the stable working area can be more accurate, and the torque control accuracy is further ensured. In the slow pressure buildup zone, starting from the instant of compressor pull-in, a constant torque Torq _ init is applied for a time Delt _ t, and then the torque is reduced to 0Nm with a Rate slope. The moment of inertia moment, static friction moment and the like which are changed from static to rotating when the compressor is sucked can be overcome, and the torque control accuracy of the slow pressure building area is further ensured.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for controlling torque of a compressor according to the present invention;
FIG. 2 is a schematic diagram of the division of three working areas according to the present invention;
FIG. 3 is a schematic view showing the linear relationship between the torque and the refrigerant pressure in three working areas of the compressor according to the present invention;
FIG. 4 is a schematic diagram of torque compensation at the moment of suction of the compressor in the slow pressure building area according to the present invention;
FIG. 5 is a schematic diagram of the method for obtaining the Limit _ T, Limit _ R and the Limit _ P according to the present invention.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
As shown in fig. 1, a torque control method of a compressor includes:
step 1: collecting the running time of a compressor, the pressure of a refrigerant and the pressure change rate data of the refrigerant;
step 2: and based on the acquired data, judging the working interval of the compressor through the pre-calibrated minimum time Limit of the slow pressure build-up, the pressure change rate Limit _ R and the pressure Limit _ P of the stable working area. The working areas comprise a slow pressure building area, a fast pressure building area and a stable working area. The judgment process of the working interval comprises the following steps:
as shown in fig. 2, when the collected operation time counted from the start of the compressor suction is less than or equal to Limit _ T, or the operation time exceeds Limit _ T but the refrigerant pressure is less than Limit _ P and the refrigerant pressure change rate is less than Limit _ R, it is determined that the working interval where the compressor is located is the slow pressure buildup zone;
when the change rate of the collected refrigerant pressure is greater than or equal to the Limit _ R and the refrigerant pressure is less than the Limit _ P, judging that the working interval where the compressor is located is a quick-build pressure area;
and judging that the working interval of the compressor is a stable working area from the time node when the collected refrigerant pressure is greater than or equal to the Limit _ P until the compressor stops running.
And step 3: when the compressor operates in different working intervals, different torque control strategies are adopted for torque control.
In the embodiment, the slow pressure building area, the fast pressure building area and the stable working area are respectively subjected to torque control by using pre-calibrated formulas, namely, Torq _1, k1, P + b1, Torq _2, k2, P + b2 and Torq _3, k3, P + b3, wherein P is the refrigerant pressure of the current working area, k1, k2 and k3 are the slopes of fitting straight lines between the compressor torque and the refrigerant pressure in the slow pressure building area, the fast pressure building area and the stable working area respectively, and b1, b2 and b3 are the vertical intercepts of the fitting straight lines in the slow pressure building area, the fast pressure building area and the stable working area respectively;
wherein k1< k3< k 2.
The equations Torq _1 ═ k1 × P + b1, Torq _2 ═ k2 × P + b2, and Torq _3 ═ k3 × P + b3 are obtained by pre-calibration, which includes:
through the compressor bench test, the test air conditioning system works under different environmental temperatures, and the refrigerant pressure and the compressor torque are recorded. And (4) separating a scatter diagram of a refrigerant pressure value and a compressor torque value of each region by combining the three working regions, and performing linear fitting on the relationship between the compressor torque and the pressure values in the slow pressure building region, the fast pressure building region and the stable working region respectively. As shown in fig. 3, a torque control formula Torq _1 ═ k1 ═ P + b1 in the slow pressure buildup zone, a torque control formula Torq _2 ═ k2 ═ P + b2 in the fast pressure buildup zone, and a torque control formula Torq _3 ═ k3 × P + b3 in the stable operating zone were obtained.
In addition, when the compressor is first sucked, it is necessary to overcome the moment of inertia, static friction, etc. which changes from static to rotary, so that a certain torque needs to be superimposed in a short time during the suction of the compressor. As shown in FIG. 4, the present scheme starts from the instant of compressor pull-in, gives the compressor a constant torque Torq _ init for a duration Delt _ t, and then decreases the torque to 0Nm with a Rate slope.
The Limit _ T, Limit _ R and the Limit _ P used in the scheme comprise multiple groups of data calibrated in advance at different ambient temperatures, and when the working interval of the compressor is judged, the working interval of the compressor is judged by adopting the Limit _ T, Limit _ R and the Limit _ P corresponding to the current ambient temperature.
The calibration process of the Limit _ T, Limit _ R and the Limit _ P at different ambient temperatures comprises the following steps:
in a set environment temperature range from T1 to T2, in the embodiment, 15 ℃ to 50 ℃ is taken, a temperature point is selected, and the whole air conditioning system is immersed under the temperature point until the refrigerant pressure of high-pressure and low-pressure pipelines of the air conditioning system reaches a balanced state (the refrigerant pressure is not changed any more); and (3) attracting the compressor when the engine reaches normal idle speed (the engine speed is stable and does not rise or fall any more), and monitoring and recording test data including refrigerant pressure, refrigerant pressure change rate and compressor attraction signals in real time. Obtaining a plurality of groups of test data including refrigerant pressure, refrigerant pressure change rate and compressor suction signals through a plurality of tests (more than or equal to three tests, wherein three tests are taken as an example);
drawing a plurality of curve graphs of the pressure of the refrigerant, the change rate of the pressure of the refrigerant and the change of a compressor suction signal along with time according to the obtained plurality of groups of test data;
as shown in fig. 5, the time duration t required for the change rate of the pressure after the suction of the compressor in each graph to reach the peak value for the first time is respectively obtained, and the time durations t are compared to obtain the maximum time duration tmax2t is to bemaxThe minimum time Limit value Limit _ T of the slow voltage build-up is used;
will have a maximum duration tmaxThe pressure change rate after a time threshold T1 (for example, 500ms) set by the turning point delay time at which the pressure change rate starts to increase rapidly after the slow build-up pressure minimum time Limit _ T is taken as a reference map of the pressure change rate Limit _ R;
dividing the lowest value of the refrigerant pressure in the multiple groups of test data by a preset coefficient (for example, 1.2) to be used as a pressure Limit value Limit _ P of a stable working area after the refrigerant pressure is stable;
and sequentially selecting other temperature points within a set environment temperature range from T1 to T2 by taking T0 (such as 5 ℃) as a temperature interval, and repeating the operation to obtain the Limit _ T, Limit _ R and the Limit _ P of a plurality of temperature points within the set environment temperature range from T1 to T2. In the set range of the ambient temperature T1-T2, the Limit _ T, Limit _ R and the Limit _ P of the rest temperatures between the adjacent temperature points are obtained by linear interpolation operation of the Limit _ T, Limit _ R and the Limit _ P of the adjacent temperature points. The acquisition of the Limit _ T, Limit _ R and the Limit _ P of the set temperature outside the interval from the ambient temperature T1 to the ambient temperature T2 comprises the following steps:
a temperature less than T1 with Limit _ T, Limit _ R and Limit _ P equal to Limit _ T, Limit _ R and Limit _ P at ambient temperature T1;
and the temperature is larger than T2, and the Limit _ T, Limit _ R and the Limit _ P of the temperature are equal to the Limit _ T, Limit _ R and the Limit _ P under the ambient temperature T2.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of 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.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (12)
1. A torque control method of a compressor, characterized in that: comprises that
Collecting the running time of a compressor, the pressure of a refrigerant and the pressure change rate data of the refrigerant;
based on the collected data, judging the working interval of the compressor through a pre-calibrated minimum time Limit of slow pressure build-up, a pressure change rate Limit _ R and a pressure Limit of a stable working area Limit _ P;
when the compressor operates in different working intervals, different torque control strategies are adopted for torque control.
2. The torque control method of a compressor according to claim 1, wherein: the working areas of the compressor comprise a slow pressure building area, a fast pressure building area and a stable working area.
3. The torque control method of a compressor according to claim 2, wherein: the judging of the working interval of the compressor comprises the following steps:
when the collected running time counted by starting the suction of the compressor is less than or equal to the Limit _ T, or the running time exceeds the Limit _ T, but the pressure of the refrigerant is less than the Limit _ P and the pressure change rate of the refrigerant is less than the Limit _ R, judging that the working interval where the compressor is located is a slow pressure building area;
when the change rate of the collected refrigerant pressure is greater than or equal to the Limit _ R and the refrigerant pressure is less than the Limit _ P, judging that the working interval where the compressor is located is a quick-build pressure area;
and judging that the working interval of the compressor is a stable working area from the time node when the collected refrigerant pressure is greater than or equal to the Limit _ P until the compressor stops running.
4. The torque control method of a compressor according to claim 1, wherein: starting from the instant of compressor pull-in, a constant torque Torq _ init is given to the compressor for a duration Delt _ t, and then the torque is reduced to 0Nm with a Rate slope.
5. The torque control method of a compressor according to claim 2, wherein: the slow pressure building area, the fast pressure building area and the stable working area are respectively subjected to torque control by adopting formulas Torq _1 ═ k1 ═ P + b1, Torq _2 ═ k2 ═ P + b2 and Torq _3 ═ k3 ═ P + b 3;
wherein, P is the refrigerant pressure of the current working region, k1, k2 and k3 are the slopes of the fitting straight lines between the compressor torque and the refrigerant pressure in the slow pressure building region, the fast pressure building region and the stable working region respectively, and b1, b2 and b3 are the vertical intercepts of the fitting straight lines in the slow pressure building region, the fast pressure building region and the stable working region respectively;
wherein k1< k3< k 2.
6. The torque control method of a compressor according to claim 5, wherein: the formula Torq _1 ═ k1 × P + b1, Torq _2 ═ k2 × P + b2, and Torq _3 ═ k3 × P + b3 are obtained by pre-calibration including:
through a compressor bench test, linear fitting is carried out on the relationship between the compressor torque and the pressure value in the slow pressure building region, the fast pressure building region and the stable working region respectively, and the torque control formula Torq _ 1-k 1-P + b1 of the slow pressure building region, the torque control formula Torq _ 2-k 2-P + b2 of the fast pressure building region and the torque control formula Torq _ 3-k 3-P + b3 of the stable working region are obtained.
7. The torque control method of a compressor according to claim 1, wherein: the Limit _ T, Limit _ R and the Limit _ P comprise multiple groups of data calibrated in advance at different ambient temperatures, and when the working interval of the compressor is judged, the working interval of the compressor is judged by adopting the Limit _ T, Limit _ R and the Limit _ P corresponding to the current ambient temperature.
8. The torque control method of a compressor according to claim 7, wherein: the calibration process of the Limit _ T, Limit _ R and the Limit _ P at different ambient temperatures comprises the following steps:
selecting a temperature point within a set environment temperature range from T1 to T2, and acquiring a plurality of groups of test data including refrigerant pressure, refrigerant pressure change rate and compressor suction signals in a multi-test mode at the temperature;
drawing a plurality of curve graphs of the pressure of the refrigerant, the change rate of the pressure of the refrigerant and the change of a compressor suction signal along with time according to the obtained plurality of groups of test data;
respectively obtaining the time length t required by the pressure change rate after the compressor is sucked in each curve graph to reach the peak value for the first time, and comparing the time lengths t to obtain the maximum time length tmax2t is to bemaxThe minimum time Limit value Limit _ T of the slow voltage build-up is used;
will have a maximum duration tmaxThe graph of (2) is used as a reference graph, and the pressure change rate after a time threshold T1 set by the turning point delay time at which the pressure change rate starts to increase rapidly after the minimum time Limit _ T of the slow voltage build-up is taken as a pressure change rate Limit _ R;
dividing the lowest value of the refrigerant pressure in the multiple groups of test data by a preset coefficient after the refrigerant pressure is stabilized to be used as a stable working area pressure Limit value Limit _ P;
and sequentially selecting other temperature points in the set environment temperature range from T1 to T2 by taking T0 as a temperature interval, and repeating the operation to obtain the Limit _ T, Limit _ R and the Limit _ P of a plurality of temperature points in the set environment temperature range from T1 to T2.
9. The torque control method of a compressor according to claim 8, wherein: and in the set environment temperature interval T1-T2, the Limit _ T, Limit _ R and the Limit _ P of the rest temperatures between the adjacent temperature points are obtained by carrying out linear interpolation operation on the Limit _ T, Limit _ R and the Limit _ P of the adjacent temperature points.
10. The torque control method of a compressor according to claim 8, wherein: the obtaining of the Limit _ T, Limit _ R and the Limit _ P of the set temperature outside the interval from T1 to T2 includes:
a temperature less than T1 with Limit _ T, Limit _ R and Limit _ P equal to Limit _ T, Limit _ R and Limit _ P at ambient temperature T1;
and the temperature is larger than T2, and the Limit _ T, Limit _ R and the Limit _ P of the temperature are equal to the Limit _ T, Limit _ R and the Limit _ P under the ambient temperature T2.
11. The torque control method of a compressor according to claim 8, wherein: selecting a temperature point, and acquiring a plurality of groups of test data including refrigerant pressure, refrigerant pressure change rate and compressor suction signals in a multi-test mode at the temperature, wherein the test data comprises:
immersing the whole air conditioning system at the temperature point until the refrigerant pressure of the high-low pressure pipeline of the air conditioning system reaches a balanced state;
the method comprises the following steps of (1) attracting a compressor when an engine reaches normal idling, and monitoring and recording test data including refrigerant pressure, refrigerant pressure change rate and compressor attraction signals in real time;
repeating the operation for multiple times to obtain multiple groups of test data.
12. A computer-readable storage medium storing a computer program, characterized in that: the computer program when executed by a processor implementing the steps of the method according to any one of claims 1 to 11.
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| CN113635736A (en) * | 2021-09-14 | 2021-11-12 | 东风汽车集团股份有限公司 | Pressure protection control method for compressor of automobile thermal management system |
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