Rotating speed self-adaptive adjusting method and device of electric air compressor

Abstract

The invention provides a rotating speed self-adaptive adjusting method and device for an electric air compressor, and belongs to the technical field of electric air compressor control. The method comprises the steps that sensing data of a brake circuit of a vehicle in a statistical period are obtained, and the operation working condition of the vehicle is determined based on the sensing data; the operation working conditions comprise good working conditions, general working conditions and complex working conditions; determining a steady-state rotating speed calibration value of the electric air compressor based on the operation condition; the steady-state rotating speed calibration value comprises a good rotating speed calibration value, a general rotating speed calibration value and a complex rotating speed calibration value corresponding to a good working condition, a general working condition and a complex working condition; and when the electric air compressor meets the starting condition, the steady-state rotating speed calibration value serves as the steady-state rotating speed of the electric air compressor in the next inflating period. The purpose that the rotating speed of the electric air compressor is adjusted in a self-adaptive mode along with the operation working condition is achieved, noise and energy consumption of the electric air compressor in the movement process can be reduced, and then the driving comfort and economical efficiency of a vehicle can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric air compressor control, and in particular to a method and device for adaptively adjusting the speed of an electric air compressor. Background Art

[0002] The current speed control strategy for electric air compressors is: when the electric air compressor meets the start-up conditions and the vehicle is in motion, the speed of the electric air compressor is set to the calibrated maximum speed. The speed does not change with the change of working conditions. Specifically, Figure 1 As shown in the figure, when the vehicle speed signal = 0, that is, the vehicle is in the state of gas consumption when parked in place, the stable speed of the electric air compressor in the energy replenishment mode is proportional to the throttle depth; when the vehicle speed>0, that is, the vehicle is in the state of gas consumption while driving, the stable speed of the electric air compressor in the energy replenishment mode is equal to the maximum speed allowed by the air compressor, which is constant and has nothing to do with the throttle depth. That is, when the vehicle is driving, regardless of the working conditions, the air compressor is pumping and replenishing energy at the maximum speed; when the vehicle is stationary, the pumping speed is proportional to the throttle depth.

[0003] The following technical problems exist: 1. The noise of the electric air compressor when pumping air is proportional to its own speed. During driving, the driver can always clearly feel the loud noise of the electric air compressor, which makes the driving comfort poor; 2. As the speed of the air compressor increases, the displacement increases, but the displacement per unit power consumption gradually decreases, that is, the efficiency of the air compressor is negatively correlated with its speed. Therefore, in the speed control method in the prior art, the speed of the electric air compressor is always at the maximum speed, the energy consumption is also the largest, and the economy is poor.

[0004] There is an urgent need to provide a method and device for adaptively adjusting the speed of an electric air compressor, so as to realize adaptive adjustment of the speed of the electric air compressor during driving, so as to improve driving comfort, reduce energy consumption and improve economy. Summary of the invention

[0005] In view of this, it is necessary to provide a method and device for adaptively adjusting the speed of an electric air compressor to solve the technical problem in the prior art that the speed of the electric air compressor is constant during driving, resulting in high noise and energy consumption of the electric air compressor.

[0006] On the one hand, in order to solve the above technical problems, the present invention provides a method for adaptively adjusting the speed of an electric air compressor, comprising: Acquire sensor data of a brake circuit of a vehicle within a statistical period, and determine an operating condition of the vehicle based on the sensor data; the operating condition includes a good operating condition, a general operating condition, and a complex operating condition; Determine a steady-state speed calibration value of the electric air compressor based on the operating condition; the steady-state speed calibration value includes a good speed calibration value, a general speed calibration value and a complex speed calibration value corresponding to the good working condition, the general working condition and the complex working condition; When the electric air compressor meets the starting conditions, the steady-state speed calibration value is used as the steady-state speed in the next pumping cycle of the electric air compressor.

[0007] In a possible implementation, the sensor data includes air compressor speed data, air pressure value of the air tank, average slope of the driving section, load and displacement data, and braking times; then determining the operating condition of the vehicle based on the sensor data includes: Determining an average load rate of the air compressor and an average downtime of the air compressor based on the air compressor speed data; Determine an average braking frequency of the vehicle based on the displacement data and the number of braking times; The operating condition of the vehicle is determined based on the air pressure value, the average slope, the load, the average load rate of the air compressor, the average downtime time of the air compressor and the average braking frequency.

[0008] In a possible implementation, when the sensor data meets all of the following conditions, the operating condition is a good condition: The average load rate of the air compressor is less than the first load rate; The average downtime of the air compressor is greater than the first downtime; The air pressure value is greater than the first pressure threshold at any time; When the sensor data meets any of the following conditions, the operating condition is a complex condition: The average load rate of the air compressor is greater than or equal to a second load rate; the second load rate is greater than the first load rate; The average downtime of the air compressor is less than or equal to the second downtime; the second downtime is less than the first downtime; The load reaches the maximum design load value; The average braking frequency is greater than a braking frequency threshold; The average slope is greater than a slope threshold; At a certain moment, the air pressure value is less than or equal to the second pressure threshold, and the duration of this air pressure value is greater than or equal to the preset time; the second pressure threshold is less than the first pressure threshold; When the operating condition is not a complex condition or a good condition, the operating condition is a general condition.

[0009] In a possible implementation, the statistical period includes multiple inflation cycles, and the inflation cycle is the length of time from when the electric air compressor is started to inflate air this time, to when it stops after the air pressure is fully filled, until it is started to inflate air next time.

[0010] In a possible implementation, when the operating condition is a good condition, determining a steady-state speed calibration value of the electric air compressor based on the operating condition includes: Obtain the historical steady-state speed calibration value and self-regulation factor in the previous statistical period; Determining a good speed based on the historical steady-state speed calibration value and the self-regulating factor; Determining whether the good speed is greater than or equal to a minimum safe speed value; When the good speed is greater than or equal to the minimum safe speed value, the good speed is used as the steady-state speed calibration value; When the good speed is less than the minimum safe speed value, the minimum safe speed value is used as the steady-state speed calibration value.

[0011] In a possible implementation, when the operating condition is a complex condition, determining a steady-state speed calibration value of the electric air compressor based on the operating condition includes: Obtain the historical steady-state speed calibration value and self-regulation factor in the previous statistical period; Determine a complex speed based on the historical steady-state speed calibration value and the self-regulating factor; Determining whether the complex speed is less than or equal to a maximum allowable speed value; When the complex speed is less than or equal to the maximum allowable speed value, the complex speed is used as the steady-state speed calibration value; When the complex speed is greater than the maximum allowable speed value, the maximum allowable speed value is used as the steady-state speed calibration value.

[0012] In a possible implementation, the optimal rotation speed is:

[0013] The complex speed is:

[0014] In the formula, r 1 For good speed; k is the historical steady-state speed calibration value; is the self-regulating factor; r 2 Complex speed.

[0015] In a possible implementation, when the operating condition is a general condition, determining the steady-state speed calibration value of the electric air compressor based on the operating condition includes: A historical steady-state speed calibration value in a previous statistical period is obtained, and the historical steady-state speed calibration value is used as the steady-state speed calibration value.

[0016] In a possible implementation, the method further includes: During the operation of the electric air compressor, determining whether a stop signal is received; When the shutdown signal is received, the electric air compressor is controlled to shut down; When the shutdown signal is not received, the electric air compressor is controlled to run at the steady-state speed.

[0017] On the other hand, the present invention also provides a speed adaptive adjustment device for an electric air compressor, comprising: An operating condition determination unit, used to obtain sensor data of a brake circuit of a vehicle within a statistical period, and determine an operating condition of the vehicle based on the sensor data; the operating condition includes a good condition, a general condition, and a complex condition; A steady-state speed calibration unit, used to determine a steady-state speed calibration value of the electric air compressor based on the operating condition; the steady-state speed calibration value includes a good speed calibration value, a general speed calibration value and a complex speed calibration value corresponding to the good working condition, the general working condition and the complex working condition; The electric air compressor speed control unit is used to use the steady-state speed calibration value as the steady-state speed in the next pumping cycle of the electric air compressor when the electric air compressor meets the starting conditions.

[0018] The beneficial effects of the present invention are as follows: the speed adaptive regulation of the electric air compressor provided by the present invention obtains the sensor data of the vehicle's brake circuit within a statistical period, determines the vehicle's operating conditions based on the sensor data, and determines the steady-state speed calibration value of the electric air compressor based on the operating conditions. The steady-state speed calibration value is not a constant value, but changes with the change of the operating conditions, thereby achieving the purpose of adaptively regulating the speed of the electric air compressor with the operating conditions, thereby reducing the noise and energy consumption of the electric air compressor during movement, thereby improving the driving comfort and economy of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of an embodiment of a speed curve diagram under speed regulation of an electric air compressor in the prior art; Figure 2 A schematic flow chart of an embodiment of a method for adaptively adjusting the speed of an electric air compressor provided by the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of an embodiment of determining the operating condition in step S201; Figure 4 For the present invention Figure 2 A schematic diagram of a specific embodiment of determining the steady-state speed calibration value under good working conditions in step S203; Figure 5 For the present invention Figure 2 A schematic diagram of a specific embodiment of determining the steady-state speed calibration value under complex working conditions in step S203; Figure 6 A schematic diagram of an embodiment of a speed curve diagram regulated by the speed adaptive regulation method for an electric air compressor provided by the present invention; Figure 7 A schematic flow chart of a specific embodiment of the method for adaptively adjusting the speed of an electric air compressor provided by the present invention; Figure 8 A schematic structural diagram of an embodiment of a speed adaptive regulating device for an electric air compressor provided by the present invention; Fig. 9 A schematic structural diagram of an embodiment of a vehicle provided by the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] It should be understood that the schematic drawings are not drawn to scale. The flowchart used in the present invention shows the operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowchart can be implemented out of order, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art, under the guidance of the content of the present invention, can add one or more other operations to the flowchart, and can also remove one or more operations from the flowchart. Some of the block diagrams shown in the accompanying drawings are functional entities, which do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0023] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] The present invention provides a method and device for adaptively adjusting the speed of an electric air compressor, which are described below.

[0025] Figure 2 A schematic flow chart of an embodiment of a method for adaptively adjusting the speed of an electric air compressor provided by the present invention is shown in FIG. Figure 2 As shown, the speed adaptive adjustment method of the electric air compressor includes: S201, acquiring sensor data of a brake circuit of a vehicle within a statistical period, and determining an operating condition of the vehicle based on the sensor data; the operating condition includes a good operating condition, a general operating condition, and a complex operating condition; S202, determining a steady-state speed calibration value of the electric air compressor based on the operating condition; the steady-state speed calibration value includes a good speed calibration value, a general speed calibration value, and a complex speed calibration value corresponding to a good working condition, a general working condition, and a complex working condition; S203: When the electric air compressor meets the starting conditions, the steady-state speed calibration value is used as the steady-state speed in the next inflation cycle of the electric air compressor.

[0026] Among them, in step S203, the electric air compressor meets the starting conditions including the following items: the vehicle is powered on in gear ON, the vehicle is powered on with high voltage, the electric vehicle meets the starting conditions and the vehicle speed is greater than zero.

[0027] It should be understood that when the vehicle speed is zero, the speed of the electric air compressor is proportional to the throttle depth.

[0028] Compared with the prior art, the electric air compressor speed adaptive regulation provided in the embodiment of the present invention obtains the sensor data of the vehicle's brake circuit within a statistical period, determines the vehicle's operating conditions based on the sensor data, and determines the steady-state speed calibration value of the electric air compressor based on the operating conditions. The steady-state speed calibration value is not a constant value, but changes with the change of the operating conditions, thereby achieving the purpose of adaptively adjusting the speed of the electric air compressor with the operating conditions, thereby reducing the noise and energy consumption of the electric air compressor during movement, and thereby improving the driving comfort and economy of the vehicle.

[0029] In some embodiments of the present invention, the sensor data includes air compressor speed data, air pressure value of the air tank, average slope of the driving section, load and displacement data, and braking times; Figure 3 As shown, determining the operating condition of the vehicle based on the sensor data in step S301 includes: S301, determining an average load rate of the air compressor and an average downtime of the air compressor based on the air compressor speed data; S302, determining an average braking frequency of the vehicle based on the displacement data and the number of braking times; S303, determining the operating condition of the vehicle based on the air pressure value, average slope, load, average load rate of the air compressor, average downtime of the air compressor and average braking frequency.

[0030] It should be understood that various types of sensor data can be obtained by real-time data collection based on various types of sensors.

[0031] The average load rate of the air compressor in step S301 is the ratio of the total working time of the electric air compressor to the sum of the total working time and the total downtime.

[0032] The average braking frequency is the ratio of the number of braking times to the displacement data.

[0033] The average downtime of the air compressor is also called the average available time for dryer regeneration.

[0034] In a specific embodiment of the present invention, when the sensor data meets all of the following conditions, the operating condition is a good condition: The average load rate of the air compressor is less than the first load rate; The average downtime of the air compressor is greater than the first downtime, which indicates that the dryer is fully regenerated and has the best ability to absorb water molecules. The air pressure value at any time is greater than the first pressure threshold.

[0035] The first load rate, the first downtime and the first pressure threshold can be set or adjusted according to the actual application scenario. In a specific embodiment of the present invention, the first load rate is 22% and the first downtime is 35 seconds.

[0036] In order to prevent the signal error frame from affecting the air pressure value and causing an error in the determination of a good working condition, in a specific embodiment of the present invention, when determining that the air pressure value at any time is greater than the first pressure threshold, it is necessary to exclude the case where the air pressure value in the air reservoir is less than the first pressure threshold in a very short time. The very short time can also be set or calibrated according to the actual application scenario or experience value.

[0037] In a specific embodiment of the present invention, when the sensor data meets any of the following conditions, the operating condition is a complex condition: The average load rate of the air compressor is greater than or equal to the second load rate; the second load rate is greater than the first load rate; The average downtime of the air compressor is less than or equal to the second downtime; the second downtime is less than the first downtime; The load reaches the maximum design load value; The average braking frequency is greater than the braking frequency threshold; The average slope is greater than the slope threshold; At a certain moment, the air pressure value is less than or equal to the second pressure threshold, and the duration of this air pressure value is greater than or equal to the preset duration; the second pressure threshold is less than the first pressure threshold.

[0038] Similarly, the second load rate, the second downtime, the braking frequency threshold and the slope threshold can all be set according to actual application scenarios.

[0039] Specifically, the second load rate is 35%, the second downtime is 26 seconds, the braking frequency threshold is 30 times / km, the slope threshold is 4°, and the preset duration is 0.5 seconds.

[0040] In the embodiment of the present invention, the duration is also taken into consideration during the determination of the air pressure value, thereby eliminating erroneous signals and further improving the accuracy of the determination of the operating condition.

[0041] In a specific embodiment of the present invention, when the operating condition is not a complex condition or a good condition, the operating condition is a general condition.

[0042] In some embodiments of the present invention, the statistical period includes multiple inflation cycles, and one inflation cycle is the length of time from when the electric air compressor is started to inflate air, to when it stops after the air pressure is fully filled, until it is started to inflate air next time.

[0043] The embodiment of the present invention can increase the amount of sensor data within the statistical period by setting the statistical period to include multiple inflation periods, thereby ensuring the reliability and accuracy of the determined operating conditions.

[0044] In a specific embodiment of the present invention, the statistical period includes 50 inflation cycles.

[0045] It should be noted that the inflation cycle refers to the inflation cycle when the vehicle speed is greater than zero, and does not include the inflation cycle when the vehicle is stationary.

[0046] In some embodiments of the present invention, when the operating condition is a good condition, such as Figure 4 As shown, the step S203 of determining the steady-state speed calibration value of the electric air compressor based on the operating condition includes: S401, obtaining the historical steady-state speed calibration value and self-adjustment factor in the previous statistical period; S402, determining a good speed based on a historical steady-state speed calibration value and a self-adjusting factor; S403, determining whether the good speed is greater than or equal to the minimum safe speed value; S404, when the good speed is greater than or equal to the minimum safe speed value, the good speed is used as the steady-state speed calibration value; S405: When the good speed is less than the minimum safe speed value, the minimum safe speed value is used as the steady-state speed calibration value.

[0047] It should be noted that the self-regulating factor can be adaptively adjusted according to different vehicle models, vehicle purposes and electric air compressor models, and calibrated when the vehicle is offline.

[0048] The embodiment of the present invention can achieve adaptive settings for different vehicle models, electric air compressor models and vehicle uses by setting an adaptive adjustment factor, thereby further improving the rationality and accuracy of the steady-state speed calibration value under good working conditions.

[0049] In some embodiments of the present invention, when the operating condition is a complex condition, such as Figure 5 As shown, the step S203 of determining the steady-state speed calibration value of the electric air compressor based on the operating condition includes: S501, obtaining the historical steady-state speed calibration value and self-adjustment factor in the previous statistical period; S502, determining a complex speed based on a historical steady-state speed calibration value and a self-regulating factor; S503, determining whether the complex speed is less than or equal to the maximum allowable speed value; S504, when the complex speed is less than or equal to the maximum allowable speed value, the complex speed is used as the steady-state speed calibration value; S505: When the complex speed is greater than the maximum allowable speed value, the maximum allowable speed value is used as the steady-state speed calibration value.

[0050] Similarly, the embodiment of the present invention can achieve adaptive settings for different vehicle models, electric air compressor models and vehicle uses by setting an adaptive adjustment factor, thereby further improving the rationality and accuracy of the steady-state speed calibration value under complex working conditions.

[0051] In a specific embodiment of the present invention, the optimal rotation speed is:

[0052] The complex speed is:

[0053] In the formula, r 1 For good speed; k is the historical steady-state speed calibration value; is the self-regulating factor; r 2 Complex speed.

[0054] In a specific embodiment of the present invention, when the operating condition is a general condition, determining the steady-state speed calibration value of the electric air compressor based on the operating condition in step S203 includes: Obtain the historical steady-state speed calibration value in the previous statistical period, and use the historical steady-state speed calibration value as the steady-state speed calibration value.

[0055] To verify the effectiveness of the speed adaptive adjustment method for the electric air compressor proposed in the embodiment of the present invention, in one embodiment of the present invention, a speed curve diagram adjusted by the speed adaptive adjustment method for the electric air compressor proposed in the embodiment of the present invention is shown in FIG. Figure 6 As shown, comparison Figure 1 and Figure 6 It can be seen that the speed of the electric air compressor in the embodiment of the present invention is not constant. In different statistical periods, the speed varies between the maximum allowable speed value and the minimum safe speed value, and has strong adaptability.

[0056] In order to realize the control of the electric air compressor during operation, in some embodiments of the present invention, the speed adaptive adjustment method of the electric air compressor further includes: During the operation of the electric air compressor, determine whether a stop signal is received; When a shutdown signal is received, the electric air compressor is controlled to shut down; When no stop signal is received, the electric air compressor is controlled to run at a steady speed.

[0057] In a specific embodiment of the present invention, Figure 7 As shown, the speed adaptive adjustment method of the electric air compressor is specifically as follows: obtaining the sensor data of the vehicle's brake circuit within a statistical period, judging the vehicle's operating condition based on the sensor data, and judging whether the operating condition is a good condition, a general condition, or a complex condition; when the operating condition is a good condition, determining a good speed, and judging whether the good speed is greater than or equal to a minimum safe speed ( ), if yes, then the steady-state speed calibration value is the good speed, if no, then the steady-state speed calibration value is the minimum safe speed. When the operating condition is a complex condition, determine the complex speed and judge whether the complex speed is less than or equal to the maximum allowable speed value ( ), if yes, the steady-state speed calibration value is the complex speed, if no, the steady-state speed calibration value is the maximum allowable speed value. When the operating condition is the general condition, the steady-state speed calibration value is the historical steady-state speed calibration value in the previous statistical period.

[0058] In order to better implement the speed adaptive adjustment method of the electric air compressor in the embodiment of the present invention, based on the speed adaptive adjustment method of the electric air compressor, the embodiment of the present invention also provides a speed adaptive adjustment device of the electric air compressor, such as Figure 8 As shown, the speed adaptive regulating device 800 of the electric air compressor includes: The operating condition determination unit 801 is used to obtain the sensor data of the brake circuit of the vehicle within the statistical period, and determine the operating condition of the vehicle based on the sensor data; the operating condition includes a good condition, a general condition and a complex condition; The steady-state speed calibration unit 802 is used to determine the steady-state speed calibration value of the electric air compressor based on the operating conditions; the steady-state speed calibration value includes a good speed calibration value, a general speed calibration value and a complex speed calibration value corresponding to good working conditions, general working conditions and complex working conditions; The electric air compressor speed control unit 803 is used to use the steady-state speed calibration value as the steady-state speed in the next inflation cycle of the electric air compressor when the electric air compressor meets the startup conditions.

[0059] The electric air compressor speed adaptive adjustment device 800 provided in the above embodiment can implement the technical solution described in the above electric air compressor speed adaptive adjustment method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above electric air compressor speed adaptive adjustment method embodiment, which will not be repeated here.

[0060] like Fig. 9 As shown, the present invention also provides a vehicle 900. The vehicle 900 includes a processor 901, a memory 902 and a display 903. Fig. 9 Only some of the components of vehicle 900 are shown, but it should be understood that implementation of all of the components shown is not a requirement, and more or fewer components may alternatively be implemented.

[0061] In some embodiments, the processor 901 may be a central processing unit (CPU), a microprocessor or other data processing chip, and is used to run program codes or process data stored in the memory 902, such as the speed adaptive adjustment method of the electric air compressor in the present invention.

[0062] In some embodiments, the processor 901 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, the processor 901 may be local or remote. In some embodiments, the processor 901 may be implemented in a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination thereof.

[0063] In some embodiments, the memory 902 may be an internal storage unit of the vehicle 900, such as a hard disk or memory of the vehicle 900. In other embodiments, the memory 902 may also be an external storage device of the vehicle 900, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the vehicle 900.

[0064] Furthermore, the memory 902 may include both an internal storage unit of the vehicle 900 and an external storage device. The memory 902 is used to store application software installed in the vehicle 900 and various data.

[0065] In some embodiments, the display 903 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 903 is used to display information of the vehicle 900 and to display a visual user interface. The components 901-903 of the vehicle 900 communicate with each other via a system bus.

[0066] In some embodiments of the present invention, when the processor 901 executes the speed adaptive adjustment program of the electric air compressor in the memory 902, the following steps may be implemented: Acquire sensor data of the vehicle's brake circuit within a statistical period, and determine the vehicle's operating conditions based on the sensor data; the operating conditions include good conditions, general conditions, and complex conditions; Determine the steady-state speed calibration value of the electric air compressor based on the operating conditions; the steady-state speed calibration value includes a good speed calibration value, a general speed calibration value and a complex speed calibration value corresponding to good working conditions, general working conditions and complex working conditions; When the electric air compressor meets the starting conditions, the steady-state speed calibration value is used as the steady-state speed in the next pumping cycle of the electric air compressor.

[0067] It should be understood that: when the processor 901 executes the speed adaptive adjustment program of the electric air compressor in the memory 902, in addition to the above functions, other functions can also be realized. For details, please refer to the description of the corresponding method embodiment above.

[0068] Furthermore, the vehicle 900 may be a fuel vehicle, an electric vehicle, or a hybrid vehicle.

[0069] Correspondingly, an embodiment of the present invention also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, it can implement the steps or functions of the speed adaptive adjustment method of the electric air compressor provided in the above-mentioned method embodiments.

[0070] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0071] The above is a detailed introduction to the speed adaptive adjustment method and device for an electric air compressor provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for adaptively adjusting the speed of an electric air compressor, characterized in that: include: Acquiring sensor data of a brake circuit of a vehicle within a statistical period, and determining an operating condition of the vehicle based on the sensor data; The operating conditions include good operating conditions, general operating conditions and complex operating conditions; Determine a steady-state speed calibration value of the electric air compressor based on the operating condition; the steady-state speed calibration value includes a good speed calibration value, a general speed calibration value and a complex speed calibration value corresponding to the good working condition, the general working condition and the complex working condition; When the electric air compressor meets the starting conditions, the steady-state speed calibration value is used as the steady-state speed in the next pumping cycle of the electric air compressor.

2. The method for adaptively adjusting the speed of an electric air compressor according to claim 1, characterized in that: The sensor data includes air compressor speed data, air pressure value of air reservoir, average slope of driving section, load and displacement data, and braking times; Then determining the operating condition of the vehicle based on the sensor data includes: Determining an average load rate of the air compressor and an average downtime of the air compressor based on the air compressor speed data; Determine an average braking frequency of the vehicle based on the displacement data and the number of braking times; The operating condition of the vehicle is determined based on the air pressure value, the average slope, the load, the average load rate of the air compressor, the average downtime time of the air compressor and the average braking frequency.

3. The method for adaptively adjusting the speed of an electric air compressor according to claim 2, characterized in that: When the sensor data meets all of the following conditions, the operating condition is a good condition: The average load rate of the air compressor is less than the first load rate; The average downtime of the air compressor is greater than the first downtime; The air pressure value is greater than the first pressure threshold at any time; When the sensor data meets any of the following conditions, the operating condition is a complex condition: The average load rate of the air compressor is greater than or equal to a second load rate; the second load rate is greater than the first load rate; The average downtime of the air compressor is less than or equal to the second downtime; The second downtime is less than the first downtime; The load reaches the maximum design load value; The average braking frequency is greater than a braking frequency threshold; The average slope is greater than a slope threshold; At a certain moment, the air pressure value is less than or equal to the second pressure threshold, and the duration of this air pressure value is greater than or equal to the preset duration; The second pressure threshold is less than the first pressure threshold; When the operating condition is not a complex condition or a good condition, the operating condition is a general condition.

4. The method for adaptively adjusting the speed of an electric air compressor according to claim 1, characterized in that: The statistical cycle includes multiple inflation cycles, and the inflation cycle is the length of time from when the electric air compressor is started to inflate this time, to when it stops after the air pressure is fully filled, until it is started to inflate next time.

5. The method for adaptively adjusting the speed of an electric air compressor according to claim 1, characterized in that: When the operating condition is a good condition, determining a steady-state speed calibration value of the electric air compressor based on the operating condition includes: Obtain the historical steady-state speed calibration value and self-regulation factor in the previous statistical period; Determining a good speed based on the historical steady-state speed calibration value and the self-regulating factor; Determining whether the good speed is greater than or equal to a minimum safe speed value; When the good speed is greater than or equal to the minimum safe speed value, the good speed is used as the steady-state speed calibration value; When the good speed is less than the minimum safe speed value, the minimum safe speed value is used as the steady-state speed calibration value.

6. The method for adaptively adjusting the speed of an electric air compressor according to claim 5, characterized in that: When the operating condition is a complex condition, determining a steady-state speed calibration value of the electric air compressor based on the operating condition includes: Obtain the historical steady-state speed calibration value and self-regulation factor in the previous statistical period; Determine a complex speed based on the historical steady-state speed calibration value and the self-regulating factor; Determining whether the complex speed is less than or equal to a maximum allowable speed value; When the complex speed is less than or equal to the maximum allowable speed value, the complex speed is used as the steady-state speed calibration value; When the complex speed is greater than the maximum allowable speed value, the maximum allowable speed value is used as the steady-state speed calibration value.

7. The method for adaptively adjusting the speed of an electric air compressor according to claim 6, characterized in that: The good rotation speed is: The complex speed is: In the formula, r 1 is a good speed; k is the historical steady-state speed calibration value; is the self-regulating factor; r 2 is the complex speed.

8. The method for adaptively adjusting the speed of an electric air compressor according to claim 1, characterized in that: When the operating condition is a general condition, determining the steady-state speed calibration value of the electric air compressor based on the operating condition includes: A historical steady-state speed calibration value in a previous statistical period is obtained, and the historical steady-state speed calibration value is used as the steady-state speed calibration value.

9. The method for adaptively adjusting the speed of an electric air compressor according to claim 1, characterized in that: The method further comprises: During the operation of the electric air compressor, determining whether a stop signal is received; When the shutdown signal is received, the electric air compressor is controlled to shut down; When the shutdown signal is not received, the electric air compressor is controlled to run at the steady-state speed.

10. A speed adaptive regulating device for an electric air compressor, characterized in that: include: An operating condition determination unit, used to obtain sensor data of a brake circuit of a vehicle within a statistical period, and determine an operating condition of the vehicle based on the sensor data; The operating conditions include good operating conditions, general operating conditions and complex operating conditions; A steady-state speed calibration unit, used to determine a steady-state speed calibration value of the electric air compressor based on the operating condition; the steady-state speed calibration value includes a good speed calibration value, a general speed calibration value and a complex speed calibration value corresponding to the good working condition, the general working condition and the complex working condition; The electric air compressor speed control unit is used to use the steady-state speed calibration value as the steady-state speed in the next pumping cycle of the electric air compressor when the electric air compressor meets the starting conditions.

Images