Vehicle brake control method, system and vehicle

Abstract

A vehicle brake control method, system and vehicle, comprising: determining a target hydraulic pressure according to a current total mass and / or temperature of the vehicle; and controlling a brake master cylinder brake of a vehicle brake system according to the target hydraulic pressure; wherein the total mass comprises a mass of the vehicle and a mass of a device towed by the vehicle. The vehicle brake control method provided by the embodiments of the present disclosure can determine the target hydraulic pressure according to the current total mass and / or temperature of the vehicle, and then control the brake master cylinder to brake, so that the braking force can be adjusted when the total mass and / or temperature of the vehicle changes, thereby improving the braking effect. The method can improve the braking effect when the state of the vehicle changes, and can be deeply integrated with intelligent driving, adjust the hydraulic pressure of the brake master cylinder based on the total mass and / or temperature of the vehicle, and improve the intelligent level.

Description

Technical Field

[0001] This disclosure relates to a vehicle braking control method, system, and vehicle. Background Technology

[0002] In related technologies, the vehicle determines the braking force based on the depth of the brake pedal, but it cannot adjust the braking force based on information such as the vehicle's status. Summary of the Invention

[0003] This disclosure provides a vehicle braking control method, system, and vehicle to at least partially solve the above-mentioned problems.

[0004] This disclosure provides a vehicle braking control method, including:

[0005] Determine the target fluid pressure based on the vehicle's current gross weight and / or temperature; and

[0006] The vehicle braking system's master cylinder is braked based on the target hydraulic pressure.

[0007] The total mass includes the mass of the vehicle and the mass of the device towing the vehicle.

[0008] In some embodiments, determining the target fluid pressure based on the vehicle's current total mass and / or temperature includes: determining the target fluid pressure based on the vehicle's current total mass and corresponding data on the brake pedal depth and brake master cylinder hydraulic pressure under different masses.

[0009] In some embodiments, determining the target fluid pressure based on the vehicle's current gross weight and / or temperature includes: determining the target fluid pressure based on the base fluid pressure and the vehicle's status information, wherein the base fluid pressure is determined based on the vehicle's current gross weight.

[0010] In some embodiments, the base hydraulic pressure is determined based on the current total mass of the vehicle, including: the base hydraulic pressure is determined based on the current total mass of the vehicle and corresponding data on the brake pedal depth and brake master cylinder hydraulic pressure under different masses.

[0011] In some embodiments, determining the target fluid pressure based on the base fluid pressure and vehicle status information includes: determining the target fluid pressure based on the base fluid pressure and the adjustment fluid pressure, wherein the adjustment fluid pressure is determined based on the vehicle status information.

[0012] In some embodiments, the status information includes at least one of the following: acceleration, deceleration, torque, vehicle speed, slope of the road, and slip ratio.

[0013] In some embodiments, determining the target fluid pressure based on the vehicle's current total mass and / or temperature includes: determining the target fluid pressure based on the vehicle's current temperature when the vehicle's current temperature is less than or equal to a first temperature.

[0014] In some embodiments, determining the target fluid pressure based on the vehicle's current temperature includes: determining the target fluid pressure based on the current temperature and corresponding data on the brake pedal depth and brake master cylinder hydraulic pressure at different temperatures.

[0015] In some embodiments, the mass of the device towed to the vehicle is determined based on interactive information.

[0016] In some embodiments, the interaction information is determined by the user through the vehicle's interaction device.

[0017] The vehicle braking control method provided in this disclosure can determine a target hydraulic pressure based on the vehicle's current total mass and / or temperature, and then control the master cylinder to apply brakes. This allows for adjustment of braking force when the vehicle's total mass and / or temperature changes, thereby improving braking performance. This method can enhance braking performance when the vehicle's state changes and can be deeply integrated with intelligent driving systems, adjusting the hydraulic pressure of the master cylinder based on the vehicle's total mass and / or temperature to improve the level of intelligence.

[0018] This disclosure also provides a vehicle braking control system, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the methods described above.

[0019] This disclosure also provides an electrical device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the methods described above.

[0020] This disclosure also provides a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implement the steps of any of the methods described above.

[0021] This disclosure also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of any of the methods described above.

[0022] This disclosure also provides a vehicle that includes the vehicle braking control system described in any of the preceding claims.

[0023] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this disclosure. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0025] To gain a more complete understanding of this disclosure and its beneficial effects, the following description will be made in conjunction with the accompanying drawings, wherein the same reference numerals denote the same parts in the following description.

[0026] Figure 1 This is a schematic flowchart of a vehicle braking control method according to some embodiments;

[0027] Figure 2 This is a flowchart illustrating a vehicle braking control method according to yet another embodiment;

[0028] Figure 3 This is a flowchart illustrating a vehicle braking control method according to yet another embodiment;

[0029] Figure 4 This is a schematic flowchart of a vehicle braking control method according to some other embodiments. Detailed Implementation

[0030] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the protection scope of this disclosure.

[0031] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for 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. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0033] Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0034] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "electrical connection," and "communication" should be interpreted broadly. For example, they can refer to fixed electrical connections, detachable electrical connections, or integral electrical connections. Connections can be direct or indirect through an intermediate medium, and can be internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0035] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, 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, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in embodiments of this disclosure is not limited. Functions may be performed in the order shown or discussed, or may be performed substantially simultaneously or in reverse order depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0036] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0037] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0038] In related technologies, when a vehicle is towed, the difference between the overall vehicle weight and the initial weight can be significant, which can easily lead to insufficient braking force for the user. With the same brake pedal travel, the braking force cannot be automatically matched to the towing conditions.

[0039] Secondly, brake fluid has poorer fluidity at low temperatures. With the same brake pedal travel, the pressure applied to the lines is smaller, which can also make the pedal feel harder to the user.

[0040] In some embodiments, such as Figure 1-4 As shown, this disclosure provides a vehicle braking control method, including:

[0041] Determine the target fluid pressure based on the vehicle's current gross weight and / or temperature; and

[0042] The vehicle braking system's master cylinder is braked based on the target hydraulic pressure.

[0043] The total mass includes the mass of the vehicle and the mass of the equipment towed by the vehicle.

[0044] The vehicle braking control method provided in this disclosure can determine a target hydraulic pressure based on the vehicle's current total mass and / or temperature, and then control the master cylinder to apply brakes. This allows for adjustment of braking force when the vehicle's total mass and / or temperature changes, thereby improving braking performance. This method can enhance braking performance when the vehicle's state changes and can be deeply integrated with intelligent driving systems, adjusting the hydraulic pressure of the master cylinder based on the vehicle's total mass and / or temperature to improve the level of intelligence.

[0045] The device attached to a vehicle can be any device, such as a trailer. When a trailer or other device is attached to a vehicle, the total mass of the vehicle increases. Similarly, the braking force provided by the brake pedal travel cannot meet the braking demand when the total mass increases.

[0046] When the vehicle's temperature changes, such as in a low-temperature environment (temperature lower than the first temperature), the braking force provided by the brake pedal travel will not be able to meet the braking demand when the temperature drops.

[0047] This disclosure allows the target fluid pressure to be determined based on the vehicle's total mass and / or temperature, facilitating braking by the master cylinder according to the target fluid pressure to provide sufficient braking force. That is, the same brake pedal travel can provide braking force that is more closely matched (e.g., greater) to the total mass and / or temperature. The user does not need to press the brake pedal deeper to achieve sufficient braking force, resulting in better vehicle braking performance and a more intelligent brake pedal feel.

[0048] The hydraulic pressure of the master cylinder can push the caliper to clamp the brake disc, generating frictional braking force, thereby achieving vehicle braking.

[0049] In some embodiments, determining the target fluid pressure based on the vehicle's current total mass and / or temperature includes: determining the target fluid pressure based on the vehicle's current total mass and corresponding data on the brake pedal depth and brake master cylinder hydraulic pressure under different masses.

[0050] Determining the target hydraulic pressure based on the vehicle's current total mass can be achieved in various suitable ways. For example, the target hydraulic pressure can be determined based on the vehicle's current total mass and the corresponding data of brake pedal depth and brake master cylinder hydraulic pressure under different masses, thereby matching the target hydraulic pressure with the vehicle's total mass to provide sufficient braking force.

[0051] The corresponding data of brake pedal depth and brake master cylinder hydraulic pressure under different masses can be determined by various suitable methods, such as calibration through experiments.

[0052] The corresponding data of brake pedal depth and brake master cylinder hydraulic force under different masses can be in various suitable forms, such as curves, tables, etc.

[0053] In some embodiments, determining the target fluid pressure based on the vehicle's current gross weight and / or temperature includes: determining the target fluid pressure based on the base fluid pressure and the vehicle's status information, wherein the base fluid pressure is determined based on the vehicle's current gross weight.

[0054] Determining the target hydraulic pressure based on the vehicle's current total mass can be achieved in various suitable ways. For example, the target hydraulic pressure can be determined based on the base hydraulic pressure and the vehicle's status information. The base hydraulic pressure is determined based on the vehicle's current total mass, thereby providing a more suitable braking force based on the vehicle's total mass and status information.

[0055] That is, the base hydraulic pressure (determined based on the vehicle's total mass) can be further adjusted and optimized based on the vehicle's status information, so that the target hydraulic pressure is more matched to the vehicle's current state and the braking effect is more ideal.

[0056] In some embodiments, the base hydraulic pressure is determined based on the current total mass of the vehicle, including: the base hydraulic pressure is determined based on the current total mass of the vehicle and corresponding data on the brake pedal depth and brake master cylinder hydraulic pressure under different masses.

[0057] The base hydraulic pressure can be determined in various suitable ways based on the current total mass, such as by the current total mass of the vehicle and the corresponding data of brake pedal depth and brake master cylinder hydraulic pressure under different masses, so that the base hydraulic pressure is matched with the total mass of the vehicle to provide sufficient braking force.

[0058] In some embodiments, determining the target fluid pressure based on the base fluid pressure and vehicle status information includes: determining the target fluid pressure based on the base fluid pressure and the adjustment fluid pressure, wherein the adjustment fluid pressure is determined based on the vehicle status information.

[0059] Determining the target hydraulic pressure based on the base hydraulic pressure and vehicle status information can be achieved in various suitable ways. For example, the target hydraulic pressure can be determined based on the base hydraulic pressure and the adjustment hydraulic pressure (determined based on the vehicle status information). Alternatively, the target hydraulic pressure can be the sum of the base hydraulic pressure and the adjustment hydraulic pressure.

[0060] This means that the basic hydraulic pressure can be adjusted and optimized based on the vehicle's condition information (adjusting the hydraulic pressure) to make the braking effect more match the vehicle's condition and improve braking performance.

[0061] In some embodiments, the status information includes at least one of the following: acceleration, deceleration, torque, vehicle speed, slope of the road, and slip ratio.

[0062] The status information can be various suitable information, such as at least one of acceleration, deceleration, torque, vehicle speed, road gradient, and slip ratio, so as to facilitate the optimization and adjustment of braking force based on various status information that affects braking effect.

[0063] In some embodiments, determining the target fluid pressure based on the vehicle's current total mass and / or temperature includes: determining the target fluid pressure based on the vehicle's current temperature when the vehicle's current temperature is less than or equal to a first temperature.

[0064] Determining the target fluid pressure based on temperature can be done in various suitable ways. For example, when the current temperature of the vehicle is less than or equal to a first temperature, the target fluid pressure can be determined based on the current temperature of the vehicle. In other words, the target fluid pressure of the brake master cylinder can be adjusted and optimized at low temperatures, so that the braking force is matched with the low temperature and the braking effect at low temperatures is improved.

[0065] In some embodiments, determining the target fluid pressure based on the vehicle's current temperature includes: determining the target fluid pressure based on the current temperature and corresponding data on the brake pedal depth and brake master cylinder hydraulic pressure at different temperatures.

[0066] The target fluid pressure can be determined in various suitable ways based on the vehicle's current temperature. For example, it can be determined based on the corresponding data of brake pedal depth and brake master cylinder hydraulic pressure at different temperatures, thereby matching the braking force with low temperatures and improving the braking effect at low temperatures.

[0067] The corresponding data of brake pedal depth and brake master cylinder hydraulic pressure at different temperatures can be determined by various suitable methods, such as calibration through testing.

[0068] The data on the relationship between brake pedal depth and brake master cylinder hydraulic pressure at different temperatures can be in various suitable forms, such as curves or tables showing the relationship between brake pedal depth and brake master cylinder hydraulic pressure at different temperatures.

[0069] In some embodiments, the mass of the device towed to the vehicle is determined based on interactive information.

[0070] The mass of the device attached to the vehicle can be determined in various suitable ways, such as by determining it based on interactive information, thereby improving the human-vehicle interaction effect and making it simple and convenient to determine the mass of the device attached to the vehicle in order to provide more suitable braking force.

[0071] In some embodiments, the interaction information is determined by the user through the vehicle's interaction device.

[0072] Interactive information can be determined in various appropriate ways, such as by the user through the vehicle's interactive device, or by inputting or selecting information such as type and weight of the device (such as a trailer) towed to the vehicle through an interactive device (such as a central control screen).

[0073] In some embodiments, such as Figure 2 As shown, the perception-estimation-compensation process is illustrated, which uses the perception layer to interpret vehicle parameters such as ambient temperature, actual trailer status, and torque.

[0074] Specifically, the driver prioritizes static input, such as trailer status selection. Users can manually set the trailer model and trailer weight via the central control screen.

[0075] During vehicle operation, the VCU (Vehicle Control Unit) / domain controller monitors information such as drive torque and gradient; the vehicle processor monitors the longitudinal acceleration of the IMU (Inertial Measurement Unit), and the temperature sensor monitors the ambient temperature; the braking system sensors monitor the master cylinder pressure / pedal travel.

[0076] Furthermore, the vehicle parameter information is processed by the processor, and the estimation layer dynamically estimates the vehicle mass based on "static input" + "dynamic calibration".

[0077] Based on the ambient temperature, the processor estimates the characteristics of the low-temperature brake fluid, and the system searches for the temperature-pressure-fluid demand (PV) curve, that is, it searches for the PV curve at different temperatures.

[0078] Furthermore, the compensation layer performs pedal feel curve optimization. Specifically, it increases the target braking pressure based on the estimated mass through load compensation and compensates for the low-temperature pressure and pedal feel based on the PV curve at the current temperature.

[0079] Furthermore, the final target pressure is obtained through comprehensive optimization. By executing the hydraulic braking unit, the same brake pedal travel / pedal force is achieved to achieve the actual braking effect of the entire vehicle, realizing a consistent brake pedal feel and deceleration across the entire system.

[0080] In some embodiments, such as Figure 3 As shown, the process of dynamic estimation of vehicle mass and braking gain strategy is illustrated.

[0081] When a user tows a trailer, the braking system detects the trailer signal and then transmits it to the VCU / domain controller.

[0082] At this point, a pop-up window on the PAD (tablet computer) allows the driver to select the trailer loading status, and the vehicle controller will calculate and output the corresponding braking pressure.

[0083] The vehicle processor dynamically calculates and estimates the vehicle load using acceleration / deceleration, torque, and master cylinder pressure signals.

[0084] The fusion algorithm combines the preliminary analysis to obtain a reasonable pressure, and then outputs the final braking pressure.

[0085] In some embodiments, such as Figure 4 The diagram illustrates the braking torque compensation strategy process under low-temperature operating conditions. In this process, the vehicle processor compares the pushrod travel with the master cylinder pressure DBR (Driver Brake Quest) database using signals from the master cylinder pressure sensor, pushrod travel, and other data.

[0086] Temperature sensors monitor ambient temperature, and the vehicle processor determines whether the temperature is below a set value.

[0087] If the temperature is lower than the set value, it indicates that the brake fluid flow is worse at the ambient temperature, and the information is entered into the DBR database.

[0088] If the DBR curve (the curve showing the relationship between the driver's braking request and the pressure within the braking system, which can be integrated into the electronic control unit of the intelligent power braking system assembly) exceeds the judgment value, the system compensates for the pressure, and the power assist module outputs pressure to the wheel end.

[0089] Furthermore, when the user cancels the brakes, the pipeline depressurizes.

[0090] If the temperature is not lower than the set temperature, no PV curve compensation will be performed.

[0091] Among them, the vehicle processor collects the corresponding curves of pushrod stroke, master cylinder pressure, and temperature, establishes a database, and confirms the set boundary values.

[0092] Furthermore, the sensors read and process data such as the actual vehicle pushrod stroke, master cylinder pressure, and ambient temperature to make judgments.

[0093] Furthermore, based on the judgment results, the opening and closing of the brake pedal adjustment solenoid valve and the wheel cylinder solenoid valve are controlled to adjust the pedal feel and compensate for pressure.

[0094] The vehicle braking control method provided in this disclosure can determine a target hydraulic pressure based on the vehicle's current total mass and / or temperature, and then control the master cylinder to apply brakes. This allows for adjustment of braking force when the vehicle's total mass and / or temperature changes, thereby improving braking performance. This method can enhance braking performance when the vehicle's state changes and can be deeply integrated with intelligent driving systems, adjusting the hydraulic pressure of the master cylinder based on the vehicle's total mass and / or temperature to improve the level of intelligence.

[0095] This disclosure also provides a vehicle braking control system, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the above methods.

[0096] This disclosure also provides an electrical device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the above methods.

[0097] This disclosure also provides a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implement the steps of any of the above methods.

[0098] This disclosure also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of any of the above methods.

[0099] This disclosure also provides a vehicle that includes the vehicle braking control system described above.

[0100] It should be noted that the aforementioned electrical equipment can be any conventionally power-consuming equipment, such as, but not limited to, controllers, vehicles, skateboard chassis, ships, drones, mobile phones, computers, air conditioners, refrigerators, washing machines, microwave ovens, printers, fax machines, etc.

[0101] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. A vehicle braking control method, characterized in that, include: Determine the target fluid pressure based on the vehicle's current gross weight and / or temperature; as well as The vehicle braking system's master cylinder is braked based on the target hydraulic pressure. The total mass includes the mass of the vehicle and the mass of the device towing the vehicle.

2. The vehicle braking control method according to claim 1, characterized in that, The determination of the target fluid pressure based on the vehicle's current total mass and / or temperature includes: determining the target fluid pressure based on the vehicle's current total mass and the corresponding data of brake pedal depth and brake master cylinder hydraulic pressure under different masses.

3. The vehicle braking control method according to claim 1, characterized in that, The determination of the target fluid pressure based on the vehicle's current total mass and / or temperature includes: determining the target fluid pressure based on the base fluid pressure and the vehicle's status information, wherein the base fluid pressure is determined based on the vehicle's current total mass; wherein the determination of the base fluid pressure based on the vehicle's current total mass includes: the base fluid pressure is determined based on the vehicle's current total mass and the corresponding data of brake pedal depth and brake master cylinder hydraulic pressure under different masses.

4. The vehicle braking control method according to claim 3, characterized in that, The step of determining the target fluid pressure based on the base fluid pressure and vehicle status information includes: determining the target fluid pressure based on the base fluid pressure and the adjustment fluid pressure, wherein the adjustment fluid pressure is determined based on the vehicle status information; wherein the status information includes at least one of the following: acceleration, deceleration, torque, vehicle speed, road gradient, and slip ratio.

5. The vehicle braking control method according to claim 1, characterized in that, The step of determining the target fluid pressure based on the vehicle's current total mass and / or temperature includes: when the vehicle's current temperature is less than or equal to a first temperature, determining the target fluid pressure based on the vehicle's current temperature; wherein, determining the target fluid pressure based on the vehicle's current temperature includes: determining the target fluid pressure based on the current temperature and the corresponding data of brake pedal depth and brake master cylinder hydraulic pressure at different temperatures.

6. The vehicle braking control method according to claim 1, characterized in that, The mass of the device towed to the vehicle is determined based on interactive information; wherein the interactive information is determined by the user through the vehicle's interactive device.

7. A vehicle braking control system, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1-6.

8. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1-6.

9. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1-6.

10. A vehicle, characterized in that, include: The vehicle braking control system as described in claim 7.

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