A noise reduction control method, device, equipment and storage medium for an electric power steering pump

Abstract

This application discloses a noise reduction control method, device, computer equipment, and computer-readable storage medium for an electric power steering pump. When the vehicle is in the ON position (power-on), the method determines whether the vehicle is stationary based on its speed, handbrake status, gear position, and drive motor operating status. Once stationary is determined, the method controls the electric power steering pump to reduce its rotational speed. This achieves accurate judgment of whether the vehicle is stationary and controls the electric power steering pump to reduce its rotational speed when the vehicle is stationary, thereby reducing the energy consumption and noise of the electric power steering pump. This effectively improves the driving and riding experience for passengers and extends the lifespan of the electric power steering pump when it is stationary.

Description

Technical Field

[0001] This application relates to the field of electric power steering pump control technology, and in particular to a noise reduction control method, device, computer equipment, and computer-readable storage medium for an electric power steering pump. Background Technology

[0002] The electric power steering pump in a vehicle provides steering fluid pressure to the steering gear, thereby reducing the difficulty of steering operations for the driver and improving the vehicle's maneuverability.

[0003] In existing technologies, the control strategy for electric power steering pumps is to maintain a maximum constant speed after the vehicle is powered on until the vehicle is powered off. However, even when there is no need for steering, the electric power steering pump continues to operate at this maximum constant speed, resulting in high energy consumption and waste. When the vehicle is stationary, other components enter a quiet state, while the electric power steering pump maintains a constant speed, leading to significant noise and affecting the passenger experience. Furthermore, maintaining a constant high speed shortens the lifespan of the electric power steering pump. Therefore, reducing the energy consumption and noise of the electric power steering pump while ensuring the vehicle's steering needs are met is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] The main objective of this application is to provide a noise reduction control method, device, computer equipment, and computer-readable storage medium for an electric power steering pump, aiming to solve the technical problem that the electric power steering pump maintains a constant high speed after the vehicle is powered on, resulting in high energy consumption and prominent noise in the vehicle.

[0005] In a first aspect, this application provides a noise reduction control method for an electric power steering pump, the method comprising the following steps:

[0006] When the vehicle is in the ON position and powered on, it is determined whether the vehicle is stationary based on the vehicle speed, handbrake status, gear status, and drive motor operating status.

[0007] After determining that the vehicle is stationary, the electric power steering pump of the vehicle is controlled to reduce its speed.

[0008] In some embodiments, determining whether the vehicle is stationary based on its speed, handbrake status, gear position, and drive motor operating status includes:

[0009] If the vehicle speed, the handbrake status, the gear status, and the drive motor operating status are all in their respective preset states, then the vehicle is determined to be stationary.

[0010] If, after determining that the vehicle is stationary, the vehicle speed, the handbrake status, the gear status, and / or the drive motor operating status are not in the corresponding preset status, then it is determined that the vehicle is not stationary.

[0011] In some embodiments, determining that the vehicle is stationary if the vehicle speed, handbrake status, gear status, and drive motor operating status are all in their corresponding preset states includes:

[0012] Determine whether the vehicle speed is less than the preset vehicle speed. If so, continue to determine whether the handbrake is in the handbrake engaged state. Otherwise, determine that the vehicle is not stationary.

[0013] If the handbrake is engaged, then it is determined whether the gear is in neutral; otherwise, it is determined that the vehicle is not stationary.

[0014] If the gear position is in neutral, then it is determined whether the speed of the drive motor is 0; otherwise, it is determined that the vehicle is not stationary.

[0015] If the drive motor speed is 0, the vehicle is determined to be stationary; otherwise, the vehicle is determined not to be stationary.

[0016] In some embodiments, the method further includes:

[0017] After determining that the vehicle is stationary, the speed of the electric power steering pump of the vehicle is reduced from the original speed to the noise reduction speed within a first preset time.

[0018] When the electric power steering pump is running at the noise-reducing speed, if the vehicle speed, the handbrake status, the gear status and / or the drive motor operating status are not in the corresponding preset status, the speed of the electric power steering pump of the vehicle is controlled to increase to the original speed within a second preset time.

[0019] In some embodiments, the first preset time is 2 seconds and the second preset time is 0.5 seconds.

[0020] In some embodiments, the original speed of the electric power steering pump is 1500 r / min, and the noise reduction speed of the electric power steering pump is 500 r / min.

[0021] In some embodiments, the method further includes:

[0022] When the vehicle goes from the off state to the ON state, the electric power steering pump is controlled to enter the original speed and maintained for a third preset time.

[0023] Secondly, this application also provides a noise reduction control device for an electric power steering pump, the device comprising:

[0024] The determination module is used to determine whether the vehicle is stationary when the vehicle is in the ON position and powered on, based on the vehicle speed, handbrake status, gear status and drive motor operating status.

[0025] The control module is used to control the electric power steering pump of the vehicle to reduce its speed after determining that the vehicle is stationary.

[0026] In some embodiments, the determining module is further configured to:

[0027] If the vehicle speed, the handbrake status, the gear status, and the drive motor operating status are all in their respective preset states, then the vehicle is determined to be stationary.

[0028] If, after determining that the vehicle is stationary, the vehicle speed, the handbrake status, the gear status, and / or the drive motor operating status are not in the corresponding preset status, then it is determined that the vehicle is not stationary.

[0029] In some embodiments, the determining module is further configured to:

[0030] Determine whether the vehicle speed is less than the preset vehicle speed. If so, continue to determine whether the handbrake is in the handbrake engaged state. Otherwise, determine that the vehicle is not stationary.

[0031] If the handbrake is engaged, then it is determined whether the gear is in neutral; otherwise, it is determined that the vehicle is not stationary.

[0032] If the gear position is in neutral, then it is determined whether the speed of the drive motor is 0; otherwise, it is determined that the vehicle is not stationary.

[0033] If the drive motor speed is 0, the vehicle is determined to be stationary; otherwise, the vehicle is determined not to be stationary.

[0034] In some embodiments, the control module is further configured to:

[0035] After determining that the vehicle is stationary, the speed of the electric power steering pump of the vehicle is reduced from the original speed to the noise reduction speed within a first preset time.

[0036] When the electric power steering pump is running at the noise-reducing speed, if the vehicle speed, the handbrake status, the gear status and / or the drive motor operating status are not in the corresponding preset status, the speed of the electric power steering pump of the vehicle is controlled to increase to the original speed within a second preset time.

[0037] In some embodiments, the first preset time is 2 seconds and the second preset time is 0.5 seconds.

[0038] In some embodiments, the original speed of the electric power steering pump is 1500 r / min, and the noise reduction speed of the electric power steering pump is 500 r / min.

[0039] In some embodiments, the control module is further configured to:

[0040] When the vehicle goes from the off state to the ON state, the electric power steering pump is controlled to enter the original speed and maintained for a third preset time.

[0041] Thirdly, this application also provides a computer device, the computer device including a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, it implements the steps of the noise reduction control method for the electric power steering pump as described above.

[0042] Fourthly, this application also provides a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, it implements the steps of the noise reduction control method for the electric power steering pump described above.

[0043] This application provides a noise reduction control method, device, computer equipment, and computer-readable storage medium for an electric power steering pump. When the vehicle is in the ON position (power-on) state, the method determines whether the vehicle is stationary based on its speed, handbrake status, gear position, and drive motor operating status. Once the vehicle is determined to be stationary, the method controls the electric power steering pump to reduce its rotational speed. This achieves accurate determination of whether the vehicle is stationary and controls the electric power steering pump to reduce its rotational speed when the vehicle is stationary, thereby reducing the energy consumption and noise of the electric power steering pump. This effectively improves the driving and riding experience for passengers and extends the lifespan of the electric power steering pump when it is stationary. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 A flowchart illustrating a noise reduction control method for an electric power steering pump provided in an embodiment of this application;

[0046] Figure 2 A schematic diagram of a vehicle's power steering system;

[0047] Figure 3 A schematic diagram illustrating the specific process of noise reduction control for electric power steering pumps;

[0048] Figure 4 A schematic block diagram of a noise reduction control device for an electric power steering pump provided in an embodiment of this application;

[0049] Figure 5 This is a schematic block diagram of the structure of a computer device according to an embodiment of this application.

[0050] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0053] This application provides a noise reduction control method, apparatus, computer device, and computer-readable storage medium for an electric power steering pump. The noise reduction control method for the electric power steering pump can be applied to a computer device, which may be a vehicle controller or an onboard computer.

[0054] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0055] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating a noise reduction control method for an electric power steering pump, provided as an embodiment of this application.

[0056] like Figure 1 As shown, the method includes steps S1 to S2.

[0057] Step S1: When the vehicle is in the ON position, determine whether the vehicle is stationary based on the vehicle speed, handbrake status, gear status, and drive motor operating status.

[0058] Step S2: After determining that the vehicle is stationary, control the electric power steering pump of the vehicle to reduce its speed.

[0059] It is worth noting that in this embodiment, the vehicle controller determines whether the vehicle is in the ON position and receives vehicle signals including vehicle speed, handbrake status, gear status and drive motor operation status to determine whether the vehicle is stationary.

[0060] It is important to understand that in this embodiment, the electric power steering pump serves as the power source for the steering system. The electric power steering pump uses a permanent magnet synchronous motor to support the SVC (Speed ​​Controlled Variable Transmission) of the high-voltage controller. The electric power steering pump is connected to the high-voltage controller via power and signal lines. The high-voltage controller communicates with the vehicle's CAN network, receiving and executing commands from the vehicle controller. The vehicle controller receives ON (Power On) signals, vehicle speed signals, handbrake signals, neutral (Neutral) signals, and drive motor speed signals through the vehicle's CAN network. The high-voltage controller of the electric power steering pump directly controls its operating status, such as speed. After determining that the vehicle is stationary, the vehicle controller sends the target speed and corresponding speed adjustment time information to the high-voltage controller, enabling the high-voltage controller to control the electric power steering pump to reduce its speed. The vehicle's power steering system is as follows: Figure 2 As shown.

[0061] Preferably, when the vehicle transitions from a powered-off state to a powered-on state, the vehicle controller controls the electric power steering pump to enter its initial speed and maintain it for a third preset time. In this embodiment, the initial speed of the electric power steering pump is 1500 r / min, and the third preset time is 5 seconds. When the vehicle controller receives the vehicle's "power-on" signal, it sends a control signal to the high-voltage controller of the electric power steering pump to enter its initial constant speed of 1500 r / min and maintain it for 5 seconds. This ensures that the high-voltage controller controls the electric power steering pump to enter its initial speed of 1500 r / min and maintain it for 5 seconds, preventing insufficient speed of the electric power steering pump in winter, which could lead to insufficient oil intake and inadequate steering power from the power steering system.

[0062] Furthermore, determining whether the vehicle is stationary based on its speed, handbrake status, gear position, and drive motor operating status includes: if the speed, handbrake status, gear position, and drive motor operating status are all in their corresponding preset states, then the vehicle is determined to be stationary; after determining that the vehicle is stationary, if the speed, handbrake status, gear position, and / or drive motor operating status are not in their corresponding preset states, then the vehicle is determined not to be stationary.

[0063] Exemplary, such as Figure 3 As shown, after the vehicle is powered on in the ON position, the vehicle controller receives the vehicle speed signal, handbrake status, gear status, and drive motor operating status. It then determines whether the vehicle speed is less than a preset speed. If so, it checks whether the handbrake is engaged; otherwise, it determines that the vehicle is not stationary. If the handbrake is engaged, it checks whether the gear is in neutral; otherwise, it determines that the vehicle is not stationary. If the gear is in neutral, it checks whether the drive motor speed is 0; otherwise, it determines that the vehicle is not stationary. If the drive motor speed is 0, it determines that the vehicle is stationary; otherwise, it determines that the vehicle is not stationary. In this embodiment, the preset vehicle speed is 1 km / h.

[0064] Furthermore, after determining that the vehicle is stationary, the rotational speed of the vehicle's electric power steering pump is controlled to decrease from its original speed to a noise-reduced speed within a first preset time. When the electric power steering pump is running at the noise-reduced speed, if the vehicle speed, handbrake status, gear position, and / or drive motor operating status are not in their corresponding preset states, the rotational speed of the vehicle's electric power steering pump is controlled to increase back to its original speed within a second preset time. The first preset time is longer than the second preset time. In this embodiment, the original rotational speed of the electric power steering pump is 1500 r / min, and the noise-reduced speed is 500 r / min. The first preset time is 2 seconds, and the second preset time is 0.5 seconds.

[0065] It's important to understand that when the vehicle speed is less than 1 km / h, the vehicle is stationary. When the handbrake is engaged, the gear is in neutral, and the drive motor speed is 0, it indicates the driver has no intention of driving. If any of these conditions are not met, it suggests the driver may intend to drive. This comprehensive assessment ensures accurate judgment of the vehicle's stationary state. Furthermore, after the electric power steering pump enters its noise-reduction speed, while the "ON" signal remains, the vehicle controller continues to determine the vehicle's stationary state based on speed, handbrake status, gear status, and drive motor speed. If the system determines the vehicle is not stationary, it controls the electric power steering pump to return to its initial speed within 0.5 seconds to prevent steering jamming and insufficient steering assistance due to excessively low pump speed during driving.

[0066] In a preferred real-time example, after receiving the ON signal from the receiving vehicle, the vehicle controller sends an initial constant speed of 1500 r / min to the high-voltage controller of the electric power steering pump for 5 seconds to prevent the power steering pump from not drawing in oil during winter. The high-voltage controller of the electric power steering pump receives the instruction from the vehicle controller and controls the electric power steering pump motor to enter the initial speed and maintain it for 5 seconds. The electric power steering pump executes the initial speed and maintains the corresponding time. After the previous step is completed, the vehicle controller receives the vehicle speed signal. When the vehicle speed is less than 1 km / h, it continues to identify the handbrake status signal. When the vehicle speed is greater than or equal to 1 km / h, it issues a command to control the electric power steering pump at 1500 rpm. If a handbrake engaged signal is received, it continues to identify the vehicle gear position signal. If no handbrake engaged signal is received, it issues a command to control the electric power steering pump at 1500 rpm. If a neutral position signal is received, it continues to identify the drive motor speed signal. If no neutral position signal is received, it issues a command to control the electric power steering pump at 1500 rpm. When the drive motor speed is 0, it issues a command to control the electric power steering pump to reduce its speed to 500 rpm. If the drive motor speed is greater than 0, it issues a command to control the electric power steering pump at 1500 rpm. This control strategy is executed every time the vehicle is powered on for the first time from the ON position. When the "ON position power on" signal is always present, the vehicle controller identifies the ON position power on signal, vehicle speed signal, handbrake signal, neutral signal, and drive motor speed signal according to the above strategy. If any of these signals changes or is lost, the vehicle controller sends a command to the high-voltage controller to control the electric power steering pump to a speed of 1500 r / min. If the electric power steering pump is currently executing the target speed of 500 r / min, in order to prevent steering jamming, the time required to increase the speed from 500 r / min to 1500 r / min is 0.5 seconds.

[0067] This embodiment provides a noise reduction control method for an electric power steering pump. When the vehicle is in the ON position (power-on), the method determines whether the vehicle is stationary based on its speed, handbrake status, gear position, and drive motor operating status. Once stationary is confirmed, the electric power steering pump's speed is reduced. This control strategy effectively identifies whether the vehicle is stationary, ensuring driving safety. By reducing the electric power steering pump's speed when the vehicle is stationary, energy consumption and noise are reduced, improving the driving experience and extending the pump's lifespan. When a steering request is detected, the pump responds quickly, operating at its maximum speed to provide sufficient steering assistance. Furthermore, this noise reduction control method eliminates the need for additional hardware, effectively saving on overall vehicle costs.

[0068] Please refer to Figure 4 , Figure 4 This is a schematic block diagram of a noise reduction control device for an electric power steering pump provided in an embodiment of this application.

[0069] Please refer to Figure 4 As shown, the device includes:

[0070] The determination module is used to determine whether the vehicle is stationary when the vehicle is in the ON position and powered on, based on the vehicle speed, handbrake status, gear status and drive motor operating status.

[0071] The control module is used to control the electric power steering pump of the vehicle to reduce its speed after determining that the vehicle is stationary.

[0072] The determining module is further configured to:

[0073] If the vehicle speed, the handbrake status, the gear status, and the drive motor operating status are all in their respective preset states, then the vehicle is determined to be stationary.

[0074] If, after determining that the vehicle is stationary, the vehicle speed, the handbrake status, the gear status, and / or the drive motor operating status are not in the corresponding preset status, then it is determined that the vehicle is not stationary.

[0075] The determining module is further configured to:

[0076] Determine whether the vehicle speed is less than the preset vehicle speed. If so, continue to determine whether the handbrake is in the handbrake engaged state. Otherwise, determine that the vehicle is not stationary.

[0077] If the handbrake is engaged, then it is determined whether the gear is in neutral; otherwise, it is determined that the vehicle is not stationary.

[0078] If the gear position is in neutral, then it is determined whether the speed of the drive motor is 0; otherwise, it is determined that the vehicle is not stationary.

[0079] If the drive motor speed is 0, the vehicle is determined to be stationary; otherwise, the vehicle is determined not to be stationary.

[0080] The control module is further used for:

[0081] After determining that the vehicle is stationary, the speed of the electric power steering pump of the vehicle is reduced from the original speed to the noise reduction speed within a first preset time.

[0082] When the electric power steering pump is running at the noise-reducing speed, if the vehicle speed, the handbrake status, the gear status and / or the drive motor operating status are not in the corresponding preset status, the speed of the electric power steering pump of the vehicle is controlled to increase to the original speed within a second preset time.

[0083] The first preset time is 2 seconds, and the second preset time is 0.5 seconds.

[0084] The electric steering pump has an initial speed of 1500 r / min and a noise reduction speed of 500 r / min.

[0085] The control module is further used for:

[0086] When the vehicle goes from the off state to the ON state, the electric power steering pump is controlled to enter the original speed and maintained for a third preset time.

[0087] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the above-described device and its modules and units can be referred to the corresponding processes in the foregoing embodiments, and will not be repeated here.

[0088] The apparatus provided in the above embodiments can be implemented as a computer program, which can be used in, for example... Figure 5 It runs on the computer device shown.

[0089] Please see Figure 5 , Figure 5 This is a schematic block diagram illustrating the structure of a computer device provided in an embodiment of this application. The computer device can be a vehicle control unit (ECU).

[0090] like Figure 5 As shown, the computer device includes a processor, memory, and network interface connected via a system bus, wherein the memory may include non-volatile storage media and internal memory.

[0091] The non-volatile storage medium can store the operating system and computer program. The computer program includes program instructions that, when executed, cause the processor to perform any noise reduction control method for the electric power steering pump.

[0092] The processor provides computing and control capabilities, supporting the operation of the entire computer device.

[0093] The internal memory provides an environment for the execution of computer programs in non-volatile storage media. When the computer program is executed by the processor, it enables the processor to execute any noise reduction control method for the electric steering pump.

[0094] This network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0095] It should be understood that the processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0096] This application also provides a computer-readable storage medium storing a computer program, the computer program including program instructions, and the noise reduction control method for the electric power steering pump implemented when the program instructions are executed can be referred to various embodiments of this application.

[0097] The computer-readable storage medium may be an internal storage unit of the computer device described in the foregoing embodiments, such as the hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the computer device.

[0098] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0099] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0100] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A noise reduction control method for an electric power steering pump, characterized in that, include: When the vehicle is in the ON position and powered on, it is determined whether the vehicle is stationary based on the vehicle speed, handbrake status, gear status, and drive motor operating status. After determining that the vehicle is stationary, control the electric power steering pump of the vehicle to reduce its speed; Determining whether the vehicle is stationary based on its speed, handbrake status, gear position, and drive motor operating status includes: If the vehicle speed, the handbrake status, the gear status, and the drive motor operating status are all in their respective preset states, then the vehicle is determined to be stationary. After determining that the vehicle is stationary, if the vehicle speed, the handbrake status, the gear status and / or the drive motor operating status are not in the corresponding preset status, then it is determined that the vehicle is not stationary. Wherein, the step of determining that the vehicle is stationary if the vehicle speed, the handbrake status, the gear status, and the drive motor operating status are all in their corresponding preset states includes: Determine whether the vehicle speed is less than the preset vehicle speed. If so, continue to determine whether the handbrake is in the handbrake engaged state. Otherwise, determine that the vehicle is not stationary. If the handbrake is engaged, then it is determined whether the gear is in neutral; otherwise, it is determined that the vehicle is not stationary. If the gear position is in neutral, then it is determined whether the speed of the drive motor is 0; otherwise, it is determined that the vehicle is not stationary. If the drive motor speed is 0, the vehicle is determined to be stationary; otherwise, the vehicle is determined not to be stationary.

2. The noise reduction control method for the electric power steering pump according to claim 1, characterized in that, Also includes: After determining that the vehicle is stationary, the speed of the electric power steering pump of the vehicle is reduced from the original speed to the noise reduction speed within a first preset time. When the electric power steering pump is running at the noise-reducing speed, if the vehicle speed, the handbrake status, the gear status and / or the drive motor operating status are not in the corresponding preset status, the speed of the electric power steering pump of the vehicle is controlled to increase to the original speed within a second preset time.

3. The noise reduction control method for the electric power steering pump according to claim 2, characterized in that, The first preset time is 2 seconds, and the second preset time is 0.5 seconds.

4. The noise reduction control method for the electric power steering pump according to claim 2, characterized in that, The original speed of the electric power steering pump is 1500 r / min, and the noise reduction speed of the electric power steering pump is 500 r / min.

5. The noise reduction control method for the electric power steering pump according to claim 2, characterized in that, Also includes: When the vehicle goes from the off state to the ON state, the electric power steering pump is controlled to enter the original speed and maintained for a third preset time.

6. A noise reduction control device for an electric power steering pump, characterized in that, include: The determination module is used to determine whether the vehicle is stationary when the vehicle is in the ON position and powered on, based on the vehicle speed, handbrake status, gear status and drive motor operating status. The control module is used to control the electric power steering pump of the vehicle to reduce its speed after determining that the vehicle is stationary. The determining module is further configured to: If the vehicle speed, the handbrake status, the gear status, and the drive motor operating status are all in their respective preset states, then the vehicle is determined to be stationary. After determining that the vehicle is stationary, if the vehicle speed, the handbrake status, the gear status and / or the drive motor operating status are not in the corresponding preset status, then it is determined that the vehicle is not stationary. The determining module is further configured to: Determine whether the vehicle speed is less than the preset vehicle speed. If so, continue to determine whether the handbrake is in the handbrake engaged state. Otherwise, determine that the vehicle is not stationary. If the handbrake is engaged, then it is determined whether the gear is in neutral; otherwise, it is determined that the vehicle is not stationary. If the gear position is in neutral, then it is determined whether the speed of the drive motor is 0; otherwise, it is determined that the vehicle is not stationary. If the drive motor speed is 0, the vehicle is determined to be stationary; otherwise, the vehicle is determined not to be stationary.

7. A computer device, characterized in that, The computer device includes a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, it implements the steps of the noise reduction control method for the electric power steering pump as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, it implements the steps of a noise reduction control method for an electric power steering pump as described in any one of claims 1 to 5.

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