Method and device for adjusting and controlling rotating speed of low-pressure steering pump and electronic equipment

Abstract

The invention discloses a low-pressure steering pump rotating speed adjusting control method and device and electronic equipment, and belongs to the technical field of automobile steering control. The low-pressure steering pump rotating speed adjusting control method comprises the steps that the working condition of a vehicle is determined according to a steering wheel rotating speed signal, a hand brake signal and a gear signal; if the vehicle is in the first working condition, the rotating speed of the low-pressure steering pump is the maximum value of the real-time rotating speed omega0 and the first rotating speed omega1; if the vehicle is in the second working condition, the rotating speed of the low-pressure steering pump is the maximum value of the real-time rotating speed omega0 and the second rotating speed omega2; the actual rotating speed of the low-pressure steering pump is the maximum rotating speed of the low-pressure steering pump in the target time section. According to the method, a proper low-voltage electric pump rotating speed control strategy is formed according to the steering requirements of the hand brake, the gear and the rotating speed of the steering wheel under different working conditions, and energy consumption caused by rotating speed redundancy of the electric pump is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile steering control, and in particular to a low-pressure steering pump rotating speed regulation control method and device and electronic equipment. BACKGROUND

[0002] Current new energy pure electric vehicles mostly use high-voltage electric power steering pump solutions, and their control strategies are mostly multi-gear control due to the limited motor rotating speed range. In the process, the electric pump still runs at high speed without steering behavior, resulting in energy waste. With the increasing market share of new energy vehicles year by year, the demand for low power consumption is increasing.

[0003] When the driver turns the steering wheel at different speeds, the steering system flow demand is different, and thus the rotating speed demand of the steering pump is different. The existing invention patent (publication number CN114738272A) discloses a speed control method for electric power steering pump of new energy bus, which electrically correlates the rotating speed of the electric power steering pump with the vehicle speed signal. When the vehicle speed is lower than or equal to the set threshold V0, the rotating speed of the electric power steering pump is ω1; when the vehicle speed is higher than the set threshold V0, the rotating speed of the electric power steering pump is ω2, and ω2<ω1. The existing invention patent (publication number CN114771648A) discloses a pure electric bus steering pump control system and strategy based on ESC, which divides the vehicle speed into four gears, and further controls the rotating speed according to the steering wheel angle and current value in each gear. The final actual electric pump rotating speed is two gears: rated rotating speed and 80% rated rotating speed.

[0004] The design idea of the existing vehicle model is that the driver fast turns the steering wheel at medium and high speeds, which has the risk of overturning the vehicle, and the driver fast turns the steering wheel at low speed. Therefore, the oil pump flow of the steering system is controlled by the vehicle speed. However, the oil pump flow demand of the steering system is only related to the steering wheel rotating speed and has nothing to do with the vehicle speed. If the oil pump flow is determined according to the vehicle speed, when the driver slowly turns the steering wheel at low vehicle speed, the low-pressure steering pump provides too much flow, resulting in waste of oil pump flow. When the driver wants to fast turn the steering wheel at high vehicle speed, the steering wheel is likely to be stuck, that is, if the vehicle speed threshold for controlling the oil pump flow is too high, the steering wheel is slowly turned and the oil pump flow is wasted, and if the vehicle speed threshold is too low, the driver is restricted from fast turning the steering wheel. SUMMARY

[0005] The application aims to provide a low-pressure steering pump rotating speed adjusting control method, device and electronic equipment, the low-pressure steering pump of the application is not associated with vehicle speed and steering wheel angle signal, but is adjusted in real time through association with steering wheel rotating speed signal, steering demand of hand brake, gear position and steering wheel rotating speed under different working conditions is formed, suitable low-pressure electric pump rotating speed control strategy is formed, actual demand flow of the system under different steering wheel rotating speeds is calculated, and the specific rotating speed of the low-pressure steering pump oil pump is controlled, so that energy consumption caused by rotating speed redundancy of the electric pump is avoided. The rotating speed control strategy of the steering pump of the application is closest to the minimum steering demand of the steering system for the steering pump at each moment under the premise of meeting the steering demand of the driver, at this time, the energy utilization rate is the highest, and the contribution to the power consumption reduction of the whole vehicle is the largest.

[0006] The application provides the following scheme:

[0007] In a first aspect, the application discloses a low-pressure steering pump rotating speed adjusting control method, comprising the following steps:

[0008] Determine the working condition of the vehicle according to the steering wheel rotating speed signal, hand brake signal and gear position signal;

[0009] If the vehicle is in a first working condition, the low-pressure steering pump rotating speed takes the maximum value of the real-time rotating speed ω0 and a first rotating speed ω1;

[0010] If the vehicle is in a second working condition, the low-pressure steering pump rotating speed takes the maximum value of the real-time rotating speed ω0 and a second rotating speed ω2;

[0011] The actual low-pressure steering pump rotating speed takes the maximum low-pressure steering pump rotating speed in the target time section.

[0012] Preferably, the first working condition is a working condition in which the hand brake is not released, the gear position is neutral or parking, and the steering wheel rotating speed is not 0;

[0013] The second working condition is a working condition in which the hand brake is released or the gear position is forward or reverse, and the steering wheel rotating speed is not 0.

[0014] Preferably, the second rotating speed ω2 is greater than the first rotating speed ω1.

[0015] Preferably, the real-time rotating speed ω0 is calculated according to the following formula: ;

[0016] Wherein, n is the steering wheel rotating speed, t is the screw pitch of the power steering gear screw, and S is the maximum working area of the steering gear. is the volumetric efficiency of the oil pump; is the internal leakage of the steering gear; is the displacement of the low-pressure steering pump.

[0017] Preferably, the method further comprises:

[0018] If the vehicle is in the third working condition, the low-pressure steering pump rotation speed takes the first rotation speed ω1;

[0019] If the vehicle is in the fourth working condition, the low-pressure steering pump rotation speed takes the second rotation speed ω2;

[0020] If the vehicle is in the fifth working condition, the low-pressure steering pump rotation speed takes the third rotation speed ω3.

[0021] Preferably, the third working condition is a working condition that the hand brake is not released and the gear is neutral or parking gear, and the steering wheel rotation speed is 0;

[0022] The fourth working condition is a working condition that the hand brake is released or the gear is forward or reverse gear, and the steering wheel rotation speed is 0;

[0023] The fifth working condition is a working condition that the steering wheel rotation speed signal is lost due to a fault.

[0024] Preferably, the third rotation speed ω3> the second rotation speed ω2> the first rotation speed ω1.

[0025] Preferably, the starting point of the target time section is t time before the current time, and the ending point is the current time.

[0026] In a second aspect, the application further discloses a low-pressure steering pump rotation speed adjusting control device, comprising: a working condition determination module, used for determining a working condition of a vehicle according to a steering wheel rotation speed signal, a hand brake signal and a gear signal;

[0027] A first working condition rotation speed selection module is configured to, if the vehicle is in a first working condition, take the maximum value between a real-time rotation speed ω0 and a first rotation speed ω1 as the low-pressure steering pump rotation speed.

[0028] A second working condition rotation speed selection module is configured to, if the vehicle is in a second working condition, take the maximum value between the real-time rotation speed ω0 and a second rotation speed ω2 as the low-pressure steering pump rotation speed.

[0029] An actual rotation speed comparison module is configured to take the maximum low-pressure steering pump rotation speed in a target time section as the actual low-pressure steering pump rotation speed.

[0030] In a third aspect, the application further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor implements the steps in the low-pressure steering pump rotation speed adjusting control method when executing the program.

[0031] In a fourth aspect, the application further provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps in the low-pressure steering pump rotation speed adjusting control method when executed by a processor.

[0032] Compared with the prior art, the application has the following advantages:

[0033] 1.The application aims at the problem that the low-speed steering wheel is wasted in low-speed and the high-speed steering wheel is insufficient in high-speed, which cannot meet the fast steering demand in the extreme scene of high-speed. A low-pressure steering pump speed regulation control method related to steering wheel speed is proposed, which adjusts the low-pressure steering pump speed to change the low-pressure steering pump flow. The low-pressure steering pump has stepless speed regulation, which can save energy to the greatest extent and meet the fast steering demand in different scenes.

[0034] 2.The application selects the maximum oil pump speed of the low-pressure steering pump in the target time section. The controller can check the speed in the recent certain time and execute according to the maximum speed during actual execution. This design can optimize the steering feel of continuous steering and make steering smoother. In addition, without the check mechanism, the system may be stuck, which may cause the steering wheel to be unable to fast.

[0035] 3.Compared with the method of controlling the oil pump flow by speed, the application can control the flow more accurately, the oil pump flow of the low-speed steering wheel is lower, and the oil pump consumption can be saved by 10-12% in low-speed working condition. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a flow chart of the low-pressure steering pump speed regulation control method provided by the embodiment of the application;

[0037] Figure 2 is a principle diagram of the low-pressure steering pump speed regulation control process provided by the embodiment of the application;

[0038] Figure 3 is a structure schematic diagram of the low-pressure steering pump speed regulation control device provided by the embodiment of the application;

[0039] Figure 4 is a structure schematic diagram of an electronic device provided by the embodiment of the application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the application clearer, the application will be described in further detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0041] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0042] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0044] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0045] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0046] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0047] Example 1

[0048] The present invention provides a method for regulating and controlling the speed of a low-pressure steering pump, comprising the following steps:

[0049] The vehicle's operating condition is determined based on steering wheel speed signals, handbrake signals, and gear signals.

[0050] If the vehicle is in the first working condition, the low-pressure steering pump speed takes the maximum value between the real-time speed ω0 and the first speed ω1;

[0051] If the vehicle is in the second working condition, the low-pressure steering pump speed takes the maximum value between the real-time speed ω0 and the second speed ω2;

[0052] The actual low-pressure steering pump speed takes the maximum low-pressure steering pump speed in the target time section.

[0053] The present application aims at the problem that the low-pressure steering pump flow is wasted at low speed and the flow is insufficient at high speed when the low-pressure steering pump flow is associated with vehicle speed, and proposes a low-pressure steering pump control method associated with steering wheel speed, which adjusts the oil pump speed of the low-pressure steering pump to change the flow of the oil pump of the low-pressure steering pump. The low-pressure steering pump has stepless speed regulation, maximizes energy saving, and still meets the fast steering demand in different scenes.

[0054] In the first working condition, the steering wheel speed is low, the actual oil pump flow demand is low, the calculated real-time speed ω0 may be close to 0, but because the oil pump start-stop will be stuck, the oil pump cannot be completely stopped, so the minimum speed ω1 in this working condition is designed. When the steering wheel is not turned or turned at a small angle, ω0 is lower than ω1, and the oil pump operates at ω1; when the steering wheel is turned at a large angle, ω0 is greater than ω1, and the oil pump operates at ω0. The design of ω2 is the same.

[0055] The maximum low-pressure steering pump speed in the target time section is selected, and the controller can check the speed in the last 10 seconds in the actual execution, and execute at the maximum speed. This design can optimize the steering feel of continuous steering, and the steering is smoother. In addition, if there is no 10s checking mechanism, system jamming may occur, which may cause the steering wheel to be unable to be turned fast.

[0056] The first working condition is the working condition that the handbrake is not released and the gear is neutral or parking gear, and the steering wheel speed is not 0;

[0057] The second working condition is the working condition that the handbrake is released or the gear is forward or reverse gear, and the steering wheel speed is not 0.

[0058] The second speed ω2 is greater than the first speed ω1.

[0059] Real-time speed

[0060] Wherein, n is the steering wheel speed; t is the screw pitch of the power steering gear screw; S is the maximum working area of the steering gear; is the volumetric efficiency of the oil pump; is the internal leakage of the steering gear; is the displacement of the low-pressure steering pump.

[0061] Also includes:

[0062] If the vehicle is in the third working condition, the low-pressure steering pump speed takes the first speed ω1;

[0063] If the vehicle is in the fourth working condition, the low-pressure steering pump speed takes the second speed ω2;

[0064] If the vehicle is in the fifth working condition, the low-pressure steering pump speed takes the third speed ω3.

[0065] The third working condition is that the hand brake is not released and the gear is neutral or parking gear, and the steering wheel speed is 0;

[0066] The fourth working condition is that the hand brake is released or the gear is forward or reverse, and the steering wheel speed is 0;

[0067] The fifth working condition is that the steering wheel speed signal is lost due to failure.

[0068] The third speed ω3> The second speed ω2> The first speed ω1.

[0069] The starting point of the target time section is t time before the current time, and the end point is the current time.

[0070] Embodiment 2

[0071] Referring to Figure 1 As shown, the embodiment of the present application provides an implementation example of a low-pressure steering pump speed regulation control method.

[0072] When the vehicle starts to power on, the HCU checks whether there is a fault feedback in the power supply and control circuit, and if there is no fault, it sends a start enable signal to the low-pressure steering pump to start running, and synchronously sends the steering wheel speed signal, the hand brake signal and the gear signal. At this time, there are several cases:

[0073] 1. When the hand brake is not released and the gear is neutral or parking gear, and the steering wheel speed is 0, the oil pump speed of the low-pressure steering pump is adjusted to ω1 at this time. This working condition corresponds to the vehicle just powered on, ω1 is a constant speed, which meets the cold start running demand of the low-pressure steering pump, preheats the system oil temperature, and avoids system noise.

[0074] 2. When the hand brake is not released and the gear is neutral or parking gear, and the steering wheel speed is not 0, the oil pump speed takes the maximum value of ω1 and ω0 in the past 10s at this time. This working condition corresponds to the driver turning the steering wheel in place, ω0 is a value that changes with the steering wheel speed, and the calculation has the following formula:

[0075] ;

[0076] n is the steering wheel speed (r / s), which is a variable of this formula;

[0077] t is the power steering gear screw pitch (mm), which is an internal parameter of the power steering gear;

[0078] S is the maximum working area of the steering gear (mm 2 ), which is an internal parameter of the power steering gear;

[0079] is the volumetric efficiency of the oil pump, which is obtained from the low-pressure steering pump assembly test;

[0080] is the internal leakage of the steering gear (L / min), which is obtained from the steering gear test;

[0081] is the low-pressure steering pump displacement (ml / r), which is an inherent parameter of the pump body;

[0082] The maximum speed lasting for 10s is the optimized hand force when the driver continuously turns the steering wheel, avoiding the high and low speed of the low-pressure steering pump.

[0083] 3. When the hand brake is released or the gear is in forward or reverse, and the steering wheel speed is 0, the oil pump speed is adjusted to ω2 at this time. This working condition corresponds to the vehicle starting or the vehicle in straight line driving process, ω2 is constant speed, ω2> ω1, which meets the slow speed small angle correction direction requirement of the vehicle.

[0084] 4. When the hand brake is released or the gear is in forward or reverse, and the steering wheel speed is not 0, the oil pump speed is adjusted to the maximum value of ω2 and ω0 in the past 10s at this time. This working condition corresponds to the vehicle steering process, the calculation method of ω0 is the same as the above formula, the maximum speed lasting for 10s is the optimized hand force when the driver continuously turns the steering wheel, avoiding the high and low speed of the low-pressure steering pump.

[0085] 5. When the communication fails, the steering wheel speed signal is lost, the oil pump speed is adjusted to ω3 at this time, ω3> ω2, ω3 is constant speed, which meets the fast direction requirement of the driver.

[0086] When the vehicle is turned off or the low-pressure steering pump reports a three-level fault for 30s, the HCU sends an inhibition enable signal, the low-pressure steering pump stops working, and sends the working state to the HCU.

[0087] Referring to Figure 2 , the low-pressure steering pump assembly is powered by the battery, interacts with the HCU through the CAN bus, and sends the steering wheel speed, hand brake signal and gear signal to the low-pressure steering pump controller. The controller adjusts the speed in real time according to the whole vehicle condition, and the sensor in the motor feedbacks the running condition in real time and finally feedbacks to the whole vehicle.

[0088] Example 3

[0089] Referring to Figure 3 As shown in the drawings, the low-pressure steering pump rotating speed adjusting control device provided by the embodiment of the application is applicable to the low-pressure steering pump rotating speed adjusting control scenarios of various vehicles, and can be implemented in the software and / or hardware manner. The low-pressure steering pump rotating speed adjusting control device comprises:

[0090] The working condition determining module 100 is configured to determine the working condition of the vehicle according to the steering wheel rotating speed signal, the hand brake signal and the gear signal.

[0091] The first working condition rotating speed selecting module 200 is configured to, if the vehicle is in the first working condition, take the maximum value between the real-time rotating speed ω0 and the first rotating speed ω1 as the low-pressure steering pump rotating speed.

[0092] The second working condition rotating speed selecting module 300 is configured to, if the vehicle is in the second working condition, take the maximum value between the real-time rotating speed ω0 and the second rotating speed ω2 as the low-pressure steering pump rotating speed.

[0093] The actual rotating speed comparing module 400 is configured to take the maximum low-pressure steering pump rotating speed in the target time section as the actual low-pressure steering pump rotating speed.

[0094] Embodiment 4

[0095] The embodiment provides an electronic device, Figure 4 is a structural schematic diagram of an electronic device provided by the embodiment of the application, referring to Figure 4 The electronic device 1000 comprises a processor 1001 and a memory 1002, and the memory 1002 stores computer readable instructions. When the computer readable instructions are executed by the processor 1001, the steps in the low-pressure steering pump rotating speed adjusting control method of any one of the above are run. Through the above technical solution, the processor 1001 and the memory 1002 are interconnected and communicate with each other through a communication bus and / or other forms of connection mechanism (not marked). The memory 1002 stores a computer program executable by the processor. When the electronic device 1000 is running, the processor 1001 executes the computer program to execute the low-pressure steering pump rotating speed adjusting control method in any optional implementation manner of the above embodiment.

[0096] Embodiment 5

[0097] The embodiment provides a computer readable storage medium, which stores a computer program. The program is executed by a processor to implement a low-pressure steering pump rotating speed adjusting control method provided by all the application embodiments.

[0098] Any combination of one or more computer readable medium can be utilized. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable computer diskette, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium can be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

[0099] A computer readable signal medium can include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal can take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium can be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

[0100] Program code embodied on a computer readable medium can 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.

[0101] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can 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 the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider). In an embodiment, the present application is directed to computer program products comprising machine-readable media for carrying or having machine-executable instructions or programs

[0102] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for regulating and controlling the speed of a low-pressure steering pump, characterized in that, Includes the following steps: The vehicle's operating condition is determined based on steering wheel speed signals, handbrake signals, and gear signals. If the vehicle is in the first operating condition, the low-pressure steering pump speed is taken as the maximum value between the real-time speed ω0 and the first speed ω1; If the vehicle is in the second operating condition, the low-pressure steering pump speed is taken as the maximum value between the real-time speed ω0 and the second speed ω2; The actual low-pressure steering pump speed is taken as the maximum low-pressure steering pump speed within the target time period.

2. The low-pressure steering pump speed regulation and control method according to claim 1, characterized in that, The first working condition is when the handbrake is not released and the gear is in neutral or parking gear, and the steering wheel speed is not 0. The second working condition is when the handbrake is released or the gear is in forward or reverse gear, and the steering wheel speed is not 0.

3. The low-pressure steering pump speed regulation and control method according to claim 2, characterized in that, The second rotational speed ω2 is greater than the first rotational speed ω1.

4. The low-pressure steering pump speed regulation and control method according to claim 1, characterized in that, ， Where n is the steering wheel speed; t is the power steering screw pitch; and S is the maximum working area of ​​the steering gear. The volumetric efficiency of the oil pump; This refers to the internal leakage of the steering gear; This is for low-pressure steering pump displacement.

5. The low-pressure steering pump speed regulation and control method according to claim 1, characterized in that, Also includes: If the vehicle is in the third operating condition, the low-pressure steering pump speed is taken as the first speed ω1; If the vehicle is in the fourth operating condition, the low-pressure steering pump speed is taken as the second speed ω2; If the vehicle is in the fifth operating condition, the low-pressure steering pump speed is taken as the third speed ω3.

6. The low-pressure steering pump speed regulation and control method according to claim 5, characterized in that, The third working condition is when the handbrake is not released and the gear is in neutral or parking gear, and the steering wheel speed is 0. The fourth working condition is when the handbrake is released or the gear is in forward or reverse gear, and the steering wheel speed is 0. The fifth operating condition is a malfunction in which the steering wheel speed signal is lost.

7. The low-pressure steering pump speed regulation and control method according to claim 6, characterized in that, The third rotational speed ω3 > the second rotational speed ω2 > the first rotational speed ω1.

8. The low-pressure steering pump speed regulation and control method according to claim 1, characterized in that, The target time segment starts at time t before the current time and ends at the current time.

9. A low-pressure steering pump speed regulation and control device, characterized in that, include: The operating condition determination module (100) is used to determine the vehicle's operating condition based on the steering wheel speed signal, handbrake signal, and gear signal. The first operating condition speed selection module (200) is used to select the maximum value between the real-time speed ω0 and the first speed ω1 if the vehicle is in the first operating condition. The second operating condition speed selection module (300) is used to select the maximum value of the real-time speed ω0 and the second speed ω2 when the vehicle is in the second operating condition. The actual speed comparison module (400) is used to obtain the maximum low-pressure steering pump speed within the target time period.

10. An electronic device comprising a memory and a processor, the memory storing a computer program executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the low-pressure steering pump speed regulation control method according to any one of claims 1 to 8.

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