Automobile electric water pump control method and system and electronic equipment

Abstract

The invention discloses an automobile electric water pump control method and system and electronic equipment. The method comprises the following steps that water pump rotating speeds corresponding to different temperatures of parts are determined; fitting a temperature-PWM duty ratio curve in the linear speed regulation interval, forming a linear control function by using the temperature-PWM duty ratio curve, and writing the linear control function into a vehicle control unit; and the vehicle control unit controls the rotating speed of the water pump according to the fitted linear control function. Linear control is conducted on the rotating speed of the electric water pump, the water pump can provide more accurate flow for parts, the parts can be made to be at the optimal working temperature, and energy consumption of the water pump is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile electric water pump control, and in particular relates to an automobile electric water pump control method, a control system and electronic equipment. Background Art

[0002] In the automotive cooling system, according to the different heat dissipation of components under different working conditions, the water pump needs to provide different flow rates for the component water jacket to remove excess heat and keep the components at the optimal working temperature. Therefore, the vehicle control system needs to adjust the speed of the cooling water pump in real time.

[0003] Regarding the water pump speed adjustment method, the current mainstream technical solution is: divide the water pump speed into several different gears (for example, 1000r / min is the 1st gear, 2000r / min is the 2nd gear, and 3000r / min is the 3rd gear), and the vehicle controller sends different gear requests to the water pump controller according to the temperature of the parts (for example, 50-60℃ requests the water pump 1st gear, 60-70℃ requests the water pump 2nd gear, and 70-80℃ requests the water pump 3rd gear)

[0004] The above control method is relatively rough and cannot take advantage of the linear speed regulation of the water pump motor. It is also unable to accurately control the water pump speed according to the heat dissipation requirements of the components, which will cause energy waste. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an automobile electric water pump control method and control system, which linearly controls the speed of the electric water pump, enables the water pump to provide more precise flow to components, helps to keep the parts at an optimal operating temperature, and reduces the energy consumption of the water pump.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a method for controlling an automobile electric water pump, comprising the following steps:

[0008] S1. Determine the water pump speed corresponding to different temperatures of components;

[0009] S2, fitting the temperature-PWM duty cycle curve within the linear speed regulation range, and forming the temperature-PWM duty cycle curve into a linear control function, and writing it into the vehicle controller;

[0010] S3. The vehicle controller controls the speed of the water pump according to the linear control function fitted in step S2.

[0011] Furthermore, in step S1, the water pump speed corresponding to the different temperatures of the components is determined according to the coolant flow rate required at the different temperatures of the components.

[0012] Furthermore, the step S2 comprises:

[0013] S21. Determine the linear speed regulation range of the electric water pump according to the water pump speed corresponding to different temperatures of the components;

[0014] S22. Confirm the relationship between the component temperature and the PWM signal duty cycle in the linear speed regulation range, and fit the temperature-PWM duty cycle curve in the linear speed regulation range;

[0015] S23. Form the temperature-PWM duty cycle curve into a linear control function and write it into the vehicle controller.

[0016] Furthermore, in step S22, a temperature-PWM duty cycle curve within the linear speed regulation range is fitted in combination with the heat dissipation requirements of the components.

[0017] Furthermore, the step S3 comprises:

[0018] S31. In the linear speed regulation range, the vehicle controller calculates the corresponding PWM duty cycle signal according to the component temperature and sends the calculated PWM duty cycle signal to the water pump;

[0019] S32. The water pump adjusts the speed in real time according to the received PWM duty cycle signal to provide the coolant flow required by the components;

[0020] S33. Collect component temperature changes through sensors and feed back the component temperatures to the vehicle controller in real time, then return to step S31 to perform closed-loop control of the water pump speed.

[0021] In a second aspect, the present invention also provides an automobile electric water pump control system, comprising:

[0022] The linear control function fitting module is used to determine the linear speed regulation range of the electric water pump and fit the linear control function between the component temperature and the PWM duty cycle within the linear speed regulation range;

[0023] The vehicle controller linearly controls the speed of the electric water pump in the linear speed regulation range according to the linear control function between the component temperature and the PWM duty cycle.

[0024] Furthermore, the linear control function fitting module is specifically used for:

[0025] Determine the water pump speed corresponding to different component temperatures based on the coolant flow rate required at different component temperatures;

[0026] Determine the linear speed regulation range of the electric water pump according to the water pump speed corresponding to different temperatures of the components;

[0027] Confirm the relationship between the component temperature and the PWM signal duty cycle in the linear speed regulation range, and fit the temperature-PWM duty cycle curve in the linear speed regulation range;

[0028] A linear control function is formed according to the temperature-PWM duty cycle curve.

[0029] In a third aspect, the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, an automobile electric water pump control method as described in the present invention is implemented.

[0030] The present invention has the following advantages:

[0031] The present invention provides a method for controlling an automobile electric water pump. Within the speed regulation range of the electric water pump, a linear function curve is used instead of a step function curve to control the rotation speed of the water pump, so that the rotation speed of the electric water pump changes more continuously and smoothly, providing more accurate flow for components, avoiding large fluctuations in the coolant flow in the system, helping to keep the components at an optimal operating temperature, and achieving energy saving at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without creative work.

[0033] Figure 1 This is a control flow of a method for controlling an automobile electric water pump according to Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the speed regulation range of an electric water pump of a certain vehicle type used in Example 1 of the present invention;

[0035] Figure 3 Schematic diagram of the temperature-PWM signal duty cycle curve fitted in Example 1 of the present invention;

[0036] Figure 4 A schematic diagram showing a comparison between a temperature-PWM signal duty cycle curve fitted in Example 1 of the present invention and a traditional control curve;

[0037] Figure 5 This is a schematic diagram of the structure of an electronic device described in Example 3 of the present invention. DETAILED DESCRIPTION

[0038] 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] This embodiment is a method for controlling an automobile electric water pump. Figure 1 As shown, it includes the following steps:

[0041] S1. According to the coolant flow required at different temperatures of components, the water pump speed corresponding to different temperatures of components is determined through simulation computer testing.

[0042] S2. Fit the temperature-PWM duty cycle curve within the linear speed regulation range, and form the temperature-PWM duty cycle curve into a linear control function, and write it into the vehicle controller:

[0043] S21. Determine the linear speed regulation range of the electric water pump according to the water pump speed corresponding to different temperatures of the components. In this embodiment, taking a certain vehicle electric water pump as an example, its linear speed regulation range is between 13% and 85% of the PWM signal duty cycle. Figure 2 shown.

[0044] S22. Confirm the relationship between the temperature of the components and the duty cycle of the PWM signal in the linear speed regulation range, and fit the temperature-PWM duty cycle curve in the linear speed regulation range. Figure 2 The X-axis in Figure 3 The Y-axis in the figure is combined with the heat dissipation requirements of components (such as the motor controller of a certain vehicle model) to fit the temperature-PWM duty cycle curve within the linear speed regulation range, such as Figure 3 shown.

[0045] S23. The temperature-PWM duty cycle curve is converted into a linear control function and written into the vehicle controller. Figure 3 The temperature-PWM duty cycle curve shown can form a linear control function:

[0046] Y=2X-37

[0047] Write the above linear control function into the vehicle controller.

[0048] S3, the vehicle controller controls the speed of the water pump according to the linear control function fitted in step S2:

[0049] S31. In the linear speed regulation range, the vehicle controller calculates the corresponding PWM duty cycle signal according to the component temperature and sends the calculated PWM duty cycle signal to the water pump;

[0050] S32. The water pump adjusts the speed in real time according to the received PWM duty cycle signal to provide the coolant flow required by the components;

[0051] S33. Collect component temperature changes through sensors, and feed back the component temperature to the vehicle controller in real time as the updated component temperature, and return to step S31 to perform closed-loop control of the water pump speed.

[0052] like Figure 4 As shown, according to the traditional control method, the water pump has three gears, and the control curve used is a step curve, such as Figure 4 As shown by the orange curve in the figure. However, this embodiment adopts a linear control curve for the water pump, such as Figure 4 As shown in the middle blue curve. By comparison, it can be seen that under the premise of ensuring the heat dissipation requirements of components, the water pump flow rate required by this control method is lower than that of the traditional control method under most working conditions, which can reduce the energy consumption of the water pump.

[0053] Example 2

[0054] This embodiment is a vehicle electric water pump control system, which includes:

[0055] The linear control function fitting module is used to determine the linear speed regulation range of the electric water pump and fit the linear control function between the component temperature and the PWM duty cycle within the linear speed regulation range;

[0056] The vehicle controller linearly controls the speed of the electric water pump in the linear speed regulation range according to the linear control function between the component temperature and the PWM duty cycle.

[0057] Furthermore, the linear control function fitting module is specifically used for:

[0058] Determine the water pump speed corresponding to different component temperatures based on the coolant flow rate required at different component temperatures;

[0059] Determine the linear speed regulation range of the electric water pump according to the water pump speed corresponding to different temperatures of the components;

[0060] Confirm the relationship between the component temperature and the PWM signal duty cycle in the linear speed regulation range, and fit the temperature-PWM duty cycle curve in the linear speed regulation range;

[0061] A linear control function is formed according to the temperature-PWM duty cycle curve.

[0062] Example 3

[0063] Figure 5 This is a schematic diagram of the structure of an electronic device in Example 3 of the present invention. Figure 5 A block diagram of an exemplary electronic device 12 suitable for use in implementing embodiments of the present invention is shown. Figure 5 The electronic device 12 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0064] like Figure 5 As shown, components of the electronic device 12 may include, but are not limited to, one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).

[0065] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0066] The electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0067] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 3 not shown, usually called a "hard drive"). Although Figure 3 Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0068] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0069] The electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 12, and / or communicate with any device that enables the electronic device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through an input / output (I / O) interface 22. In addition, the electronic device 12 in this embodiment, the display 24 does not exist as an independent individual, but is embedded in the mirror surface, and when the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface are visually integrated. In addition, the electronic device 12 may also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN) and / or public network, such as the Internet) through a network adapter 20. As shown in the figure, the network adapter 20 communicates with other modules of the electronic device 12 through a bus 18. It should be understood that although not shown in the figures, other hardware and / or software modules may be used in conjunction with the electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0070] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28, such as implementing a vehicle electric water pump control method provided by an embodiment of the present invention.

[0071] Example 4

[0072] Embodiment 4 of the present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, an automobile electric water pump control method as provided in all the embodiments of the present application is implemented.

[0073] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0074] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0075] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0076] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0077] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for controlling an automobile electric water pump, characterized in that: The following steps are involved: S1. Determine the water pump speed corresponding to different temperatures of components; S2, fitting the temperature-PWM duty cycle curve within the linear speed regulation range, and forming the temperature-PWM duty cycle curve into a linear control function, and writing it into the vehicle controller; S3. The vehicle controller controls the speed of the water pump according to the linear control function fitted in step S2.

2. A method for controlling an automobile electric water pump as claimed in claim 1, characterized in that: In the step S1, the water pump speed corresponding to the different temperatures of the components is determined according to the coolant flow rate required at the different temperatures of the components.

3. The method for controlling an automobile electric water pump according to claim 1, characterized in that: The step S2 comprises: S21. Determine the linear speed regulation range of the electric water pump according to the water pump speed corresponding to different temperatures of the components; S22. Confirm the relationship between the component temperature and the PWM signal duty cycle in the linear speed regulation range, and fit the temperature-PWM duty cycle curve in the linear speed regulation range; S23. Form the temperature-PWM duty cycle curve into a linear control function and write it into the vehicle controller.

4. A method for controlling an automobile electric water pump as claimed in claim 3, characterized in that: In the step S22, a temperature-PWM duty cycle curve within the linear speed regulation range is fitted in combination with the heat dissipation requirements of the components.

5. The method for controlling an automobile electric water pump according to claim 1, characterized in that: The step S3 comprises: S31. In the linear speed regulation range, the vehicle controller calculates the corresponding PWM duty cycle signal according to the component temperature and sends the calculated PWM duty cycle signal to the water pump; S32. The water pump adjusts the speed in real time according to the received PWM duty cycle signal to provide the coolant flow required by the components; S33. Collect component temperature changes through sensors and feed back the component temperatures to the vehicle controller in real time, then return to step S31 to perform closed-loop control of the water pump speed.

6. An automobile electric water pump control system, characterized in that: include: The linear control function fitting module is used to determine the linear speed regulation range of the electric water pump and fit the linear control function between the component temperature and the PWM duty cycle within the linear speed regulation range; The vehicle controller linearly controls the speed of the electric water pump in the linear speed regulation range according to the linear control function between the component temperature and the PWM duty cycle.

7. The automotive electric water pump control system according to claim 6, characterized in that: The linear control function fitting module is specifically used for: According to the coolant flow rate required by the components at different temperatures, determine the water pump speed corresponding to the different temperatures of the components; Determine the linear speed regulation range of the electric water pump according to the water pump speed corresponding to different temperatures of the components; Confirm the relationship between the component temperature and the PWM signal duty cycle in the linear speed regulation range, and fit the temperature-PWM duty cycle curve in the linear speed regulation range; A linear control function is formed according to the temperature-PWM duty cycle curve.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, an automobile electric water pump control method as described in any one of claims 1-5 is implemented.

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