Comfort-enhanced fluid replenishment method, integrated brake fluid replenishment apparatus, vehicle, and storage medium

Abstract

A comfort-enhanced fluid replenishment method, an integrated brake fluid replenishment apparatus, a vehicle, and a storage medium. The method comprises: acquiring the volume consumption of a brake fluid in a servo cylinder (410), so as to determine that there is a fluid replenishment request (S100); on the basis of the speed or deceleration of a vehicle, converting the fluid replenishment request into a comfort-enhanced fluid replenishment request (S200); by means of calculation, obtaining a fluid replenishment target volume and a fluid replenishment target flow rate (S300); and on the basis of the fluid replenishment target volume and the fluid replenishment target flow rate, controlling a fluid replenishment time and a fluid replenishment flow rate, so as to perform comfort-enhanced fluid replenishment on the servo cylinder (410) (S400).

Description

Comfortable fluid replenishment method, integrated brake fluid replenishment device, vehicle and storage medium

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 2024108391952, filed on June 26, 2024, entitled “Comfortable fluid replenishment method, integrated brake fluid replenishment device, vehicle and storage medium”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of automobiles, in particular to a comfortable fluid replenishment method, an integrated brake fluid replenishment device, a vehicle and a storage medium. BACKGROUND

[0004] With the development of intelligentization and electrification of today's society, most vehicles are equipped with integrated brake control systems (IBC). The IBC system completes the braking of the vehicle through the brake hydraulic oil circuit. When the vehicle wheel cylinder completes the pressure maintaining and pressure reducing process, part of the brake fluid will flow into the oil canister from the normally closed valve, causing the brake fluid in the servo cylinder to decrease, thereby reducing the braking ability. At this time, fluid replenishment needs to be performed in the servo cylinder to ensure braking performance. Noise is generated during normal fluid replenishment. When the surrounding environment is relatively quiet and the vehicle speed is low or the deceleration is small, and the noise of other systems of the vehicle is small, the fluid replenishment noise is easy to be perceived, affecting the comfort of the driver and passengers. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a comfortable fluid replenishment method, which effectively reduces the fluid replenishment noise and ensures the comfort of the passengers.

[0006] The present application also provides an integrated brake fluid replenishment device, a vehicle and a storage medium.

[0007] According to a comfortable fluid replenishment method according to the first aspect of the present application, comprising:

[0008] Obtaining the volume consumption of the brake fluid of the servo cylinder to determine the existence of a fluid replenishment request;

[0009] According to the vehicle speed or deceleration, the fluid replenishment request is changed to a comfortable fluid replenishment request;

[0010] The target fluid replenishment volume and the target fluid replenishment flow rate are calculated;

[0011] According to the target fluid replenishment volume and the target fluid replenishment flow rate, the fluid replenishment time and the fluid replenishment flow rate are controlled to perform comfortable fluid replenishment on the servo cylinder.

[0012] According to the comfortable replenishment method, at least the following beneficial effects are achieved:

[0013] The vehicle speed and deceleration are considered in the comfortable replenishment method, the comfortable replenishment is triggered when the vehicle speed is low or the deceleration is small, the replenishment flow is limited to a small range by controlling the replenishment flow and the replenishment time, the replenishment noise is greatly reduced, the driver is prevented from being distracted, the vehicle comfort is improved, and the replenishment mode is more comprehensive and the working conditions are more adaptable.

[0014] According to some embodiments of the present application, the volume consumption of the servo cylinder brake fluid is obtained to determine whether the replenishment request exists, comprising:

[0015] When the volume consumption is greater than a first threshold, the replenishment request exists.

[0016] According to some embodiments of the present application, the replenishment request is changed to a comfortable replenishment request according to the vehicle speed or deceleration, comprising:

[0017] When the volume consumption is less than a second threshold, it is determined whether the comfortable replenishment request is triggered according to the vehicle speed or deceleration.

[0018] According to some embodiments of the present application, in the comfortable replenishment, the replenished volume and the maximum replenishment period are calculated, and the comfortable replenishment is ended according to the replenished volume or the maximum replenishment period.

[0019] According to some embodiments of the present application, the comfortable replenishment is ended according to the replenished volume or the maximum replenishment period, comprising:

[0020] When the replenished volume is greater than a third threshold or the replenishment time is greater than the maximum replenishment period, the comfortable replenishment is ended.

[0021] According to some embodiments of the present application, the replenishment method further comprises:

[0022] When the replenishment request exists, a low volume flow q1 is calculated to stop the motor movement of the servo cylinder, a total timer is increased to reach a target flow, and a delay is set to ensure that a control valve at the outlet of the servo cylinder is closed;

[0023] If the replenishment request is true and the waiting time is greater than the closing time of the control valve, the preparation state is entered;

[0024] According to some embodiments of the present application, the replenishment method further comprises:

[0025] In the preparation state, a comfortable replenishment flow q2 in the preparation stage is calculated and a preparation stage time is calculated, and the comfortable replenishment flow q2 is greater than the low volume flow q1.

[0026] According to some embodiments of the present application, the liquid supplement method further comprises:

[0027] If the preparation stage time is greater than a fourth threshold value or the extrapolated pressure is lower than a lower limit and the motor starts to reverse, the liquid supplement state is entered.

[0028] According to some embodiments of the present application, the liquid supplement method further comprises:

[0029] In the liquid supplement state, a comfortable liquid supplement flow rate q3 in a liquid supplement stage is calculated, the comfortable liquid supplement flow rate q3 being greater than the comfortable liquid supplement flow rate q2.

[0030] According to some embodiments of the present application, the liquid supplement method further comprises:

[0031] In the liquid supplement state, if a liquid supplement time exceeds a maximum liquid supplement period, a transition state is entered;

[0032] In the transition state, a liquid supplement flow rate q4 in a transition stage is calculated, the liquid supplement flow rate q4 being less than the comfortable liquid supplement flow rate q3.

[0033] According to some embodiments of the present application, the liquid supplement method further comprises:

[0034] In the transition state, if a pressure difference of the control valve is lower than a fifth threshold value, no air is entered, the servo cylinder pressure is greater than a minimum lower limit, and the liquid supplement time is greater than a maximum upper limit, the liquid supplement is ended.

[0035] An integrated brake liquid supplement device according to the second aspect of the embodiments of the present application comprises:

[0036] A detection and judgment module is configured to acquire a volume consumption of servo cylinder brake fluid to judge that there is a liquid supplement request, and to change the liquid supplement request into a comfortable liquid supplement request according to a vehicle speed or a deceleration;

[0037] A calculation module is configured to calculate a liquid supplement target volume and a liquid supplement target flow rate;

[0038] An execution module is configured to control a liquid supplement time and a liquid supplement flow rate to perform comfortable liquid supplement on the servo cylinder according to the liquid supplement target volume and the liquid supplement target flow rate.

[0039] The integrated brake liquid supplement device according to the embodiments of the present application has at least the following beneficial effects:

[0040] The application detects the volume consumption of the servo cylinder brake fluid by a detection judgment module to determine whether the system has a liquid supplement request, and changes the liquid supplement request to a comfortable liquid supplement request after determining that the vehicle speed or deceleration meets the conditions. Then, the application calculates the liquid supplement target volume and liquid supplement target flow rate by a calculation module, and then controls the liquid supplement time and liquid supplement flow rate to perform comfortable liquid supplement on the servo cylinder according to the liquid supplement target volume and the liquid supplement target flow rate, so that the vehicle speed and deceleration are considered, and the liquid supplement mode is more comprehensive and the working condition is more suitable.

[0041] According to some embodiments of the application, further comprising:

[0042] A vehicle braking system includes a servo cylinder, an oil can, a control valve, a one-way valve, and a wheel brake, the servo cylinder has a piston and a motor driving the piston to move, the servo cylinder is connected with the oil can through the one-way valve, the servo cylinder is connected with the wheel brake through the control valve, and the execution module is used to control the motor.

[0043] According to a third aspect of the embodiments of the application, a vehicle includes a memory, a processor, and a program stored in the memory and executable on the processor, and when the program is executed by the processor, the comfortable liquid supplement method is realized.

[0044] According to a fourth aspect of the embodiments of the application, a computer readable storage medium stores computer executable instructions for making a computer execute the comfortable liquid supplement method.

[0045] Other features and advantages of the application will be described in the following description, and some will become apparent from the description, or will be understood by those skilled in the art through implementation of the application. BRIEF DESCRIPTION OF DRAWINGS

[0046] The application will be further described below in combination with the drawings and examples, in which:

[0047] FIG. 1 is a schematic view of an integrated brake liquid supplement device according to the application;

[0048] FIG. 2 is a schematic view of a vehicle braking system according to the application;

[0049] FIG. 3 is a schematic view of the steps of a comfortable liquid supplement method according to the application;

[0050] FIG. 4 is a schematic view of the control logic of a comfortable liquid supplement method according to the application;

[0051] FIG. 5 is a comfortable liquid supplement flowchart of a comfortable liquid supplement method according to the application;

[0052] FIG. 6 is a liquid supplement action flowchart of a vehicle braking system according to the application;

[0053] Reference signs:

[0054] detection judgment module 100;

[0055] calculation module 200;

[0056] execution module 300;

[0057] vehicle braking system 400;servo cylinder 410;oil can 420;control valve 430;one-way valve 440;wheel brake 450. Embodiments of the present application

[0058] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0059] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, which is only for the purpose of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0060] In the description of the present application, the plural refers to two or more. If there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence relationship of the technical features indicated.

[0061] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0062] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0063] When the vehicle wheel cylinder completes the pressure maintaining and pressure reducing process, part of the brake fluid will flow into the oil can 420 from the normally closed valve, resulting in a decrease in brake fluid in the servo cylinder 410, thereby reducing the braking ability. At this time, it is necessary to supplement the liquid in the servo cylinder 410 to ensure the braking performance. Noise will be generated during normal liquid supplementing. When the noise of other systems of the vehicle is small, the liquid supplementing noise is easy to be perceived, which affects the comfort of the driver and passengers.

[0064] The common replenishment function judges whether to perform replenishment by calculating the brake fluid consumption, without considering the vehicle speed and deceleration, and without limiting the noise generated during replenishment. When the surrounding environment is relatively quiet and the vehicle speed is low or the deceleration is small, if the normal replenishment function is performed at this time, the generated noise is easy to be perceived by the people in the vehicle, affecting the driving and riding comfort.

[0065] The integrated brake replenishment device provided by the embodiment of the present application is used for performing comfortable replenishment for the servo cylinder 410 in the brake system, can greatly reduce the noise generated during replenishment, and effectively improves the driving comfort. The integrated brake replenishment device is described below by taking a specific example.

[0066] As shown in FIG. 1, the integrated brake replenishment device of the present application comprises a detection and judgment module 100, a calculation module 200, an execution module 300, and a vehicle brake system 400.

[0067] As shown in FIG. 2, the vehicle brake system 400 of the present application comprises a servo cylinder 410, an oil canister 420, a control valve 430, a one-way valve 440, and a wheel brake 450. The servo cylinder 410 comprises a cylinder body, a piston slidingly installed in the cylinder body, and a motor for driving the piston to reciprocate. The piston and the cylinder body form a hydraulic cavity inside. The hydraulic cavity has a liquid outlet and a replenishment port. The liquid outlet is connected to the wheel brake 450 on the vehicle through a pipeline. If the vehicle is four-wheeled, the liquid outlet is connected to the wheel brakes 450 on the four wheels through a pipeline. The replenishment port is connected to the oil canister 420 through a pipeline to form a replenishment channel. The one-way valve 440 is arranged between the replenishment port and the oil canister 420. The flow direction of the one-way valve 440 is from the oil canister 420 to the replenishment port. During normal braking, the motor drives the piston to move in the cylinder body, so that the hydraulic cavity is compressed, and the brake fluid is pressurized and delivered to the wheel brake 450 to realize the braking function.

[0068] The control valve 430 is installed between the servo cylinder 410 and the wheel brake 450. In the normal braking mode, the control valve 430 is in an open state. When the brake fluid in the hydraulic cavity is reduced, the control valve 430 is in a closed state. At this time, the motor drives the piston to move back, and the volume of the hydraulic cavity increases. At this time, the brake fluid in the oil canister 420 is replenished to the hydraulic cavity through the one-way valve 440 to realize the replenishment function.

[0069] The detection and judgment module 100 is used to detect the volume consumption of the brake fluid of the servo cylinder 410. It can be understood that the volume consumption of the brake fluid is indirectly detected by detecting the displacement of the piston. When the inner diameter of the cylinder body and the displacement of the piston are known, the volume consumption of the brake fluid of the servo cylinder 410 can be obtained by calculation. The volume consumption of the brake fluid of the servo cylinder 410 is obtained by multiplying the displacement of the piston by the cross-sectional area inside the cylinder body.

[0070] The detection judgment module 100 can determine whether the vehicle braking system 400 has a liquid supplement request according to the volume consumption of the servo cylinder 410 brake fluid. When the volume consumption is greater than a first threshold value, it is determined that the system has a liquid supplement request. The first threshold value is set according to the actual vehicle model.

[0071] In addition, the detection judgment module 100 is also used to detect the vehicle speed and deceleration. When either the vehicle speed or the deceleration meets the condition, the liquid supplement request is changed to a comfortable liquid supplement request. The vehicle speed and deceleration can be detected by the vehicle's built-in speed sensor and deceleration sensor, respectively.

[0072] The detection judgment module 100 of the present application is also used to change the liquid supplement request to a comfortable liquid supplement request according to the size of the vehicle speed and deceleration. It can be understood that when the vehicle speed is less than a preset speed value or the deceleration is less than a preset deceleration value, the liquid supplement request is changed to a comfortable liquid supplement request. The preset speed value and the preset deceleration value are set according to the actual vehicle model.

[0073] When the vehicle speed decreases or the deceleration is small, the noise of other systems of the vehicle is correspondingly small. If the surrounding environment is relatively quiet, the liquid supplement noise is easy to be perceived. At this time, the ordinary liquid supplement request is modified to a comfortable liquid supplement request.

[0074] The calculation module 200 is used to calculate the liquid supplement target volume and the liquid supplement target flow rate during comfortable liquid supplement. The liquid supplement target volume is the upper limit value of the liquid supplement amount, and the liquid supplement target flow rate is the upper limit value of the liquid supplement flow rate. Under the known liquid supplement target volume and liquid supplement target flow rate, the required liquid supplement time can be obtained. Since the normal braking function also needs to be considered under normal conditions, the liquid supplement time cannot be too long, and the upper limit value of the liquid supplement time, i.e., the maximum liquid supplement period, needs to be calculated. During comfortable liquid supplement, the liquid supplement time needs to be controlled within the range of the maximum liquid supplement period. If the liquid supplement time is greater than the maximum liquid supplement period, the comfortable liquid supplement ends. The limitation of the maximum liquid supplement period is also determined according to different vehicle models.

[0075] The liquid supplement target volume is obtained by volume consumption. Under ideal conditions, the volume consumption is equal to the liquid supplement target volume. However, due to mechanical assembly errors, a certain error is allowed. The liquid supplement target flow rate is equivalent to an optimal liquid supplement flow rate. During comfortable liquid supplement, liquid supplement is performed according to the liquid supplement target volume.

[0076] In addition, the volume of the liquid supplement needs to be calculated during the liquid supplement process. If the supplemented volume is greater than a third threshold value, it is determined that the comfortable liquid supplement ends.

[0077] The execution module 300 is used to receive the signals sent by the calculation module 200 and the detection and judgment module 100, and the signals include the comfort fluid supplement request, the supplement target volume, the supplement target flow, the maximum supplement period and the like. The execution module 300 controls the supplement time and the supplement flow to perform the comfort fluid supplement on the servo cylinder 410 according to the sent signals. Specifically, the execution module 300 is used to control the rotation of the motor. When the supplement is performed, the execution module 300 controls the motor to reverse to drive the piston to move back, thereby achieving the supplement function.

[0078] The detection and judgment module 100 is used to detect the volume consumption of the servo cylinder 410 brake fluid to determine whether the system has a supplement request. When the vehicle speed or the deceleration meets the condition, the supplement request is changed into the comfort fluid supplement request. Then, the calculation module 200 is used to calculate the supplement target volume and the supplement target flow. Subsequently, the execution module 300 controls the supplement time and the supplement flow to perform the comfort fluid supplement on the servo cylinder 410 according to the supplement target volume and the supplement target flow. The vehicle speed and the deceleration are considered, so that the supplement mode is more comprehensive and the working condition is more suitable.

[0079] The supplement flow of the comfort fluid supplement is limited to a small range, which will affect the supplement speed. The application considers that the brake efficiency needs to be ensured when the comfort fluid supplement function is realized to ensure the brake ability of the vehicle brake system 400. If the volume consumption of the servo cylinder 410 brake fluid is too large, the comfort fluid supplement is not suitable. Since the supplement flow of the comfort fluid supplement is low, it is difficult to quickly supplement the brake fluid required for braking to the servo cylinder 410. Therefore, the detection and judgment module 100 is further used to detect whether the volume consumption of the servo cylinder 410 brake fluid is less than a second threshold value. The second threshold value can be understood as a comfort fluid supplement threshold value. At this time, the second threshold value is greater than the first threshold value. The second threshold value is set according to different vehicle models.

[0080] When the volume consumption of the servo cylinder 410 brake fluid is less than the comfort fluid supplement threshold value, the content volume of the servo cylinder 410 is high at this time, which proves that the supplement demand is not so strong. Therefore, the comfort fluid supplement can be performed. That is, the supplement request can be changed into the comfort fluid supplement request at this time.

[0081] It can be understood that the detection and judgment module 100 is used to change the supplement request into the comfort fluid supplement request according to the size of the vehicle speed and the deceleration and the volume consumption of the servo cylinder 410 brake fluid. It can be understood that when the vehicle speed is less than a preset speed value or the deceleration is less than a preset deceleration value, and the volume consumption of the servo cylinder 410 brake fluid is less than the comfort fluid supplement threshold value, the supplement request is changed into the comfort fluid supplement request. In this way, the brake ability can be ensured under the premise of the comfort fluid supplement, thereby ensuring the vehicle driving safety.

[0082] In some embodiments, when the volume consumption is less than the second threshold value, it is determined whether to trigger the comfort refilling request according to the vehicle speed or deceleration, the refilling flow is limited under the premise of brake efficiency, which can greatly reduce the noise generated during refilling, effectively improve the driving comfort, and also ensure the brake ability.

[0083] As shown in FIGS. 3-6, the present application also provides a comfort refilling method applied to the integrated brake refilling device. Referring to the schematic diagram shown in FIG. 3, the comfort refilling method is described in detail below.

[0084] As shown in FIG. 3, the comfort refilling method of the present application includes but is not limited to the following:

[0085] Step S100: obtaining the volume consumption of the servo cylinder 410 brake fluid to determine whether there is a refilling request;

[0086] Step S200: changing the refilling request to a comfort refilling request according to the vehicle speed or deceleration;

[0087] Step S300: calculating the refilling target volume and refilling target flow;

[0088] Step S400: controlling the refilling time and refilling flow to perform comfort refilling on the servo cylinder 410 according to the refilling target volume and refilling target flow.

[0089] In step S100, the detection and judgment module 100 is used to calculate the volume consumption of the servo cylinder 410 brake fluid. Specifically, the displacement of the piston is detected to indirectly detect the volume consumption of the brake fluid. When the inner diameter of the cylinder body and the displacement of the piston are known, the volume consumption of the servo cylinder 410 brake fluid can be calculated by multiplying the cross-sectional area inside the cylinder body by the displacement of the piston. According to the volume consumption of the servo cylinder 410 brake fluid, it is determined whether the vehicle brake system 400 has a refilling request. When the volume consumption is greater than the first threshold value, it is determined that the system has a refilling request.

[0090] In step S200, under the premise of refilling request, the detection and judgment module 100 is used to detect the vehicle speed and deceleration. When either the vehicle speed or the deceleration meets the condition, the refilling request is changed to a comfort refilling request. The vehicle speed and deceleration can be detected by the vehicle's built-in speed sensor and deceleration sensor, respectively.

[0091] In order to ensure the braking performance and the braking capability of the vehicle braking system 400, the capacity consumption needs to be considered when the liquid request is changed into the comfortable liquid supplement request. Then, the liquid supplement request is changed into the comfortable liquid supplement request according to the vehicle speed, the deceleration, and the capacity consumption of the servo cylinder 410. It can be understood that when the vehicle speed is less than the preset speed value, or the deceleration is less than the preset deceleration value, and the capacity consumption of the servo cylinder 410 is less than the comfortable liquid supplement threshold, the liquid supplement request is changed into the comfortable liquid supplement request. In this way, the braking capability can be ensured under the premise of the comfortable liquid supplement, and the vehicle driving safety is ensured.

[0092] In steps S300 and S400, the comfortable liquid supplement target volume and the comfortable liquid supplement target flow rate are calculated by the calculation module 200. The comfortable liquid supplement target volume is the upper limit of the liquid supplement amount, and the comfortable liquid supplement target flow rate is the upper limit of the liquid supplement flow rate. When the comfortable liquid supplement target volume and the comfortable liquid supplement target flow rate are known, the required liquid supplement time can be obtained. Since the normal braking function needs to be considered under the normal state, the liquid supplement time cannot be too long. At this time, the upper limit of the liquid supplement time, that is, the maximum liquid supplement period, needs to be calculated. In the comfortable liquid supplement process, the liquid supplement time needs to be controlled within the range of the maximum liquid supplement period. If the liquid supplement time is greater than the maximum liquid supplement period, the comfortable liquid supplement is ended.

[0093] The comfortable liquid supplement target volume is obtained by the capacity consumption. In the ideal state, the capacity consumption is equal to the comfortable liquid supplement target volume. However, due to the assembly error of the machine, a certain error is allowed. In the comfortable liquid supplement process, the liquid supplement is performed according to the comfortable liquid supplement target volume. In addition, the supplemented volume needs to be calculated in the liquid supplement process. If the supplemented volume is greater than the third threshold value, it is judged that the comfortable liquid supplement is ended.

[0094] The execution module 300 is used to control the comfortable liquid supplement of the servo cylinder 410 by controlling the rotation of the motor. In the liquid supplement process, the execution module 300 controls the motor to reverse to drive the piston to move back, thereby achieving the function of liquid supplement.

[0095] As shown in the method control logic of FIG. 4, in the whole method, the comfortable liquid supplement request needs to be triggered according to the capacity consumption, the liquid supplement request, the vehicle speed, and the deceleration. Then, the comfortable liquid supplement target flow rate and the comfortable liquid supplement target volume are calculated. Then, the supplemented volume and the maximum liquid supplement period are calculated. The comfortable liquid supplement request, the comfortable liquid supplement target flow rate, and the maximum liquid supplement period are used for the logic judgment and calculation of the liquid supplement control. At the same time, the liquid supplement request is output to the capacity consumption calculation, thereby forming a negative feedback.

[0096] As shown in Fig. 5, when the volume consumption is less than the second threshold value, the deceleration is less than the preset speed value or the deceleration is less than the preset deceleration value, and the fluid supplement request is true, the fluid supplement request becomes a comfortable fluid supplement request, and the target volume and the target flow rate of the comfortable fluid supplement are calculated, and the fluid supplement mode becomes the comfortable fluid supplement. Then, the supplemented volume and the maximum fluid supplement period are calculated. Finally, the fluid supplement logic control is entered and the fluid supplement is started, and the function ends after the fluid supplement is completed.

[0097] As shown in Fig. 6, the entire action flowchart of the integrated brake fluid supplement device, initially, the device is in the default state, at this time, all indicators are 0, when there is a fluid supplement request, that is, the fluid supplement request is true, the request state is entered, at this time, the low volume flow rate q1 in the request state is calculated, so as to stop the motor movement of the servo cylinder 410, and the total timer is increased to reach the fluid supplement target flow rate, and the delay is set to ensure that the control valve 430 at the outlet of the servo cylinder 410 is closed, and the fluid supplement type is not distinguished in the request state;

[0098] If there is no brake request at this time, jump back to the default state;

[0099] If the fluid supplement request is true and the waiting time is greater than the closing time of the control valve 430, the preparation state is entered;

[0100] In the preparation state, the comfortable fluid supplement flow rate q2 in the preparation stage is calculated, and the preparation stage time is calculated, wherein the comfortable fluid supplement flow rate q2 is greater than the low volume flow rate q1;

[0101] If the fluid supplement request is false after the check at this time or the waiting time is greater than the closing time of the control valve 430, jump back to the default state;

[0102] If the preparation stage time is greater than the fourth threshold value or the extrapolated pressure is lower than the lower limit and the motor starts to reverse, the fluid supplement state is entered;

[0103] In the fluid supplement state, the comfortable fluid supplement flow rate q3 in the fluid supplement stage is calculated, wherein the comfortable fluid supplement flow rate q3 is greater than the comfortable fluid supplement flow rate q2;

[0104] If the fluid supplement request is false after the check at this time or the waiting time is greater than the closing time of the control valve 430, jump back to the default state;

[0105] In the fluid supplement state, if the fluid supplement time exceeds the maximum fluid supplement period, the transition state is entered;

[0106] In the transition state, the fluid supplement flow rate q4 in the transition stage is calculated, and the fluid supplement flow rate q4 is less than the comfortable fluid supplement flow rate q3.

[0107] In the transition state, if the pressure difference of the control valve 430 import and export is lower than the fifth threshold value, no air enters, and the servo cylinder 410 pressure is greater than the lower limit and the liquid supplement time is greater than the upper limit, the liquid supplement is over, and jumps back to the default state.

[0108] The application takes speed and deceleration into account, so that the liquid supplement mode is more comprehensive and the working conditions are more suitable. When the capacity consumption is low, comfortable liquid supplement is performed, and the servo cylinder 410 has a higher content at this time. Thus, under the premise of comfortable liquid supplement, a certain braking capacity is ensured, the vehicle driving safety is ensured, comfortable liquid supplement is triggered when the vehicle speed is low, the liquid supplement noise is greatly reduced, the driver is prevented from being distracted, and the vehicle comfort is improved.

[0109] The application also provides a vehicle, including a memory, a processor, and a program stored in the memory and executable on the processor. When the program is executed by the processor, the comfortable liquid supplement method is implemented.

[0110] The processor can be implemented in the form of a general CPU (Central Processing Unit, central processor), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute related programs to implement the technical solutions provided by the embodiments of the application.

[0111] The memory can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory can store an operating system and other application programs. When the technical solutions provided by the embodiments of the application are implemented by software or firmware, the related program codes are stored in the memory and executed by the processor to implement the method of the application.

[0112] The vehicle also includes the integrated brake liquid supplement device described above. Specifically, the vehicle can be a private car, such as a sedan, an SUV, an MPV, or a pickup truck, etc. The vehicle can also be an operating vehicle, such as a minibus, a bus, a small truck, or a large trailer, etc. The vehicle can be a gasoline car or a new energy car. When the vehicle is a new energy car, it can be a hybrid car or a pure electric car.

[0113] According to an embodiment of the application, a computer readable storage medium has a computer program stored thereon, which, when executed by a processor, implements the comfortable liquid supplement method described above.

[0114] The computer readable storage medium of the embodiments of the present application can adopt any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, but is not limited to, an electrical, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, device or apparatus, or any combination of the above. 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 above. In the embodiments of the present application, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus or device.

[0115] The computer readable signal medium can include a computer readable program code in a baseband or propagated as a carrier wave in a propagation medium. Such a propagated signal can take a wide variety of forms, including but not limited to, electro-magnetic, optical, or any suitable combination thereof. Computer readable signal media can also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport program for use by or in connection with an instruction execution system, apparatus, or device.

[0116] Program code embodied on a computer readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the above.

[0117] It can be understood that the contents of the above-mentioned integrated brake liquid supplementing device embodiments are applicable to the vehicle embodiments, the vehicle embodiments specifically implement the same functions as the above-mentioned integrated brake liquid supplementing device embodiments, and achieve the same beneficial effects as the above-mentioned integrated brake liquid supplementing device embodiments.

[0118] It should be understood that portions of the present application can be realized with hardware, software, firmware or any combination thereof. In the above-described embodiments, a plurality of steps or methods can be realized with software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized with hardware, and as in another embodiment, it can be realized with any one or a combination of the following technologies known in the art: discrete logic circuit having logic gates for implementing logical functions of data signals, application specific integrated circuit having suitable combination logic gates, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0119] In the description of the application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0120] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A comfort fluid refilling method, comprising: acquiring a volume consumption of a servo cylinder brake fluid to determine a presence of a fluid refilling request; converting the fluid refilling request into a comfort fluid refilling request according to a vehicle speed or deceleration; calculating a fluid refilling target volume and a fluid refilling target flow rate; controlling a fluid refilling time and a fluid refilling flow rate to perform a comfort fluid refilling of the servo cylinder according to the fluid refilling target volume and the fluid refilling target flow rate.

2. The comfort fluid refilling method of claim 1, wherein: the acquiring a volume consumption of a servo cylinder brake fluid to determine a presence of a fluid refilling request comprises: a presence of a fluid refilling request is determined when the volume consumption is greater than a first threshold value.

3. The comfort fluid refilling method of claim 2, wherein: the converting the fluid refilling request into a comfort fluid refilling request according to a vehicle speed or deceleration comprises: a determination of whether to trigger the comfort fluid refilling request according to a vehicle speed or deceleration when the volume consumption is less than a second threshold value.

4. The comfort fluid refilling method of claim 1, wherein: in performing the comfort fluid refilling, a refilled volume and a maximum fluid refilling period are calculated, and a determination of a comfort fluid refilling end is made according to the refilled volume or the maximum fluid refilling period.

5. The comfort fluid refilling method of claim 4, wherein: the determination of the comfort fluid refilling end according to the refilled volume or the maximum fluid refilling period comprises: the comfort fluid refilling end is determined when the refilled volume is greater than a third threshold value or the fluid refilling time is greater than the maximum fluid refilling period.

6. The comfort fluid refilling method of claim 1, wherein: the fluid refilling method further comprises: when the fluid refilling request is present, entering a request state, calculating a low volume flow rate ql to stop a motor movement of the servo cylinder, increasing a total timer to reach a target flow rate, and setting a delay to ensure a control valve at an outlet of the servo cylinder is closed; if the fluid refilling request is true and a waiting time is greater than a closing time of the control valve, entering a preparation state.

7. The comfort fluid refilling method of claim 6, wherein: the fluid refilling method further comprises: in the preparation state, calculating a preparation phase comfort fluid refilling flow rate q2 and a preparation phase time, the preparation phase comfort fluid refilling flow rate q2 being greater than the low volume flow rate ql.

8. The comfort fluid refilling method of claim 7, wherein: the fluid refilling method further comprises: if the preparation phase time is greater than a fourth threshold value or an extrapolated pressure is lower than a lower limit and the motor starts to reverse, entering a fluid refilling state.

9. The comfort fluid refilling method of claim 8, wherein: the fluid refilling method further comprises: in the fluid refilling state, calculating a fluid refilling phase comfort fluid refilling flow rate q3, the fluid refilling phase comfort fluid refilling flow rate q3 being greater than the preparation phase comfort fluid refilling flow rate q2.

10. The comfort fluid refilling method of claim 9, wherein: the fluid refilling method further comprises: in the fluid refilling state, if a fluid refilling time exceeds a maximum fluid refilling period, entering a transition state; in the transition state, calculating a transition phase fluid refilling flow rate q4, the transition phase fluid refilling flow rate q4 being less than the fluid refilling phase comfort fluid refilling flow rate q3.

11. The comfort fluid refilling method of claim 10, wherein: the fluid refilling method further comprises: In the transition state, if the pressure difference of the control valve is lower than the fifth threshold value, no air enters, the servo cylinder pressure is greater than the lower limit, and the liquid supplement time is greater than the upper limit, the liquid supplement ends.

12. An integrated brake liquid supplement device, comprising: a detection judgment module for obtaining the volume consumption of the servo cylinder brake fluid to determine the presence of a liquid supplement request; and according to the vehicle speed or deceleration to change the liquid supplement request to a comfortable liquid supplement request a calculation module for calculating the liquid supplement target volume and the liquid supplement target flow rate; an execution module for controlling the liquid supplement time and the liquid supplement flow rate to perform comfortable liquid supplement on the servo cylinder according to the liquid supplement target volume and the liquid supplement target flow rate.

13. The integrated brake fluid refill device of claim 12, wherein: Further comprising: a vehicle brake system comprising a servo cylinder, an oil tank, a control valve, a one-way valve, and a wheel brake, the servo cylinder having a piston and a motor driving the piston to move, the servo cylinder being connected with the oil tank through the one-way valve, the servo cylinder being connected with the wheel brake through the control valve, and the execution module being used to control the motor.

14. A vehicle comprising a memory, a processor, and a program stored on the memory and executable on the processor, the program being executed by the processor to implement the comfortable liquid supplement method according to any one of claims 1 to 11.

15. A computer readable storage medium storing computer executable instructions for causing a computer to execute the comfortable liquid supplement method according to any one of claims 1 to 11.

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