Electric vehicle associated tire pressure drivability control method and system

Abstract

The invention belongs to the technical field of automobile tire pressure maintenance, and discloses an electric automobile associated tire pressure drivability control method and system, and the method comprises the steps: obtaining a tire pressure value in real time through a tire pressure sensor, and transmitting the tire pressure value to a vehicle control unit; and judging whether the tire pressure value is greater than the first tire pressure or not through a vehicle control unit, if so, controlling the vehicle to enter a high tire pressure driving mode, otherwise, judging whether the tire pressure value is less than the second tire pressure or not, if so, controlling the vehicle to enter a low tire pressure driving mode, and otherwise, keeping a conventional driving mode. According to the invention, while the energy consumption of the whole vehicle is reduced, the drivability and safety of the whole vehicle are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile tire pressure maintenance, and in particular relates to a drivability control method and system associated with tire pressure of an electric vehicle. Background Art

[0002] With the popularization of electric vehicles, the scenarios and working conditions in which users use electric vehicles are becoming more and more complicated, and users are increasingly anxious about the range of electric vehicles and concerned about energy consumption. Among them, the tire pressure of electric vehicles is an important factor affecting the energy consumption of the entire vehicle. When the tire pressure is low, the contact area between the tire and the ground becomes larger and the adhesion becomes greater, which will lead to increased energy consumption of the entire vehicle, heavier steering, and weakened vehicle acceleration performance; when the tire pressure is high, the contact area between the tire and the ground becomes smaller and the adhesion becomes smaller, which will lead to increased energy consumption of the entire vehicle, erratic steering, and the vehicle is prone to slipping when accelerating sharply. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention discloses a drivability control method and system for an electric vehicle associated with tire pressure.

[0004] The present invention is achieved through the following technical solutions:

[0005] In a first aspect, a drivability control method of an electric vehicle associated with tire pressure includes:

[0006] The tire pressure value is obtained in real time through the tire pressure sensor and sent to the vehicle controller;

[0007] The vehicle controller determines whether the tire pressure value is greater than the first tire pressure. If so, the vehicle is controlled to enter a high tire pressure driving mode. Otherwise, the vehicle controller determines whether the tire pressure value is less than the second tire pressure. If so, the vehicle is controlled to enter a low tire pressure driving mode. Otherwise, the normal driving mode is maintained.

[0008] In some embodiments, the high tire pressure driving mode includes reminding the user through the vehicle control screen, limiting the vehicle's maximum speed to a preset high tire pressure driving mode safety value through the vehicle controller, increasing the torque loading gradient through the vehicle controller, and increasing the wheel steering assist torque through the steering booster.

[0009] In some embodiments, the low tire pressure driving mode includes reminding the user through the vehicle control screen, limiting the vehicle's maximum speed to a preset low tire pressure driving mode safety value through the vehicle controller, reducing the torque loading gradient through the vehicle controller, and reducing the wheel steering assist torque through the steering booster.

[0010] In some embodiments, the first tire pressure is greater than the second tire pressure.

[0011] In some embodiments, reminding the user through the vehicle-mounted control screen includes text prompts and voice prompts.

[0012] In some embodiments, the setting of the high tire pressure driving mode safety value is positively correlated with the degree to which the tire pressure value exceeds the first tire pressure.

[0013] In some embodiments, the setting of the low tire pressure driving mode safety value is negatively correlated with the degree to which the tire pressure value is lower than the second tire pressure.

[0014] In a second aspect, a driving control system for an electric vehicle associated with tire pressure includes:

[0015] The sensor module is used to obtain tire pressure values ​​in real time and send them to the vehicle controller;

[0016] The vehicle control module is used to determine whether the tire pressure value is greater than the first tire pressure. If so, the vehicle is controlled to enter a high tire pressure driving mode. Otherwise, the tire pressure value is determined to be less than the second tire pressure. If so, the vehicle is controlled to enter a low tire pressure driving mode. Otherwise, the normal driving mode is maintained.

[0017] In some embodiments, it also includes:

[0018] The high tire pressure driving module is used to remind the user through the vehicle control screen, limit the vehicle's maximum speed to a preset high tire pressure driving mode safety value through the vehicle controller, increase the torque loading gradient through the vehicle controller, and increase the wheel steering assist torque through the steering booster.

[0019] In some embodiments, it also includes:

[0020] The low tire pressure driving module is used to remind the user through the vehicle control screen, limit the vehicle's maximum speed to a preset low tire pressure driving mode safety value through the vehicle controller, reduce the torque loading gradient through the vehicle controller, and reduce the wheel steering assist torque through the steering booster.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. Adjust the vehicle's driving mode according to tire pressure in real time to reduce vehicle energy consumption;

[0023] 2. Dynamically adjust vehicle parameters to improve driving experience and safety;

[0024] 3. Optimize user perception, and use visual and auditory reminders to prevent users from panicking or making mistakes due to abnormal tire pressure.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the present use information. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a flow chart of a method for controlling drivability of an electric vehicle associated with tire pressure according to the present embodiment. DETAILED DESCRIPTION

[0028] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0029] In some embodiments, Figure 1 A drivability control method for an electric vehicle associated with tire pressure is shown, which obtains tire pressure values ​​in real time through a tire pressure sensor and sends them to a vehicle controller (VCU);

[0030] The vehicle controller determines whether the tire pressure value is greater than the first tire pressure, and if so, controls the vehicle to enter a high tire pressure driving mode; otherwise, determines whether the tire pressure value is less than the second tire pressure, and if so, controls the vehicle to enter a low tire pressure driving mode, and otherwise, maintains a normal driving mode;

[0031] The high tire pressure driving mode includes reminding the user through an in-vehicle control unit (IHU), limiting the maximum speed of the vehicle to a preset high tire pressure driving mode safety value through a vehicle controller, increasing the torque loading gradient through a vehicle controller, and increasing the steering assist torque through a power steering system (EPS);

[0032] The low tire pressure driving mode includes reminding the user through the vehicle control screen, limiting the vehicle's maximum speed to a preset high tire pressure driving mode safety value through the vehicle controller, reducing the torque loading gradient through the vehicle controller, and reducing the steering assist torque through the steering booster.

[0033] Specifically, the first tire pressure is greater than the second tire pressure. When the vehicle is started, the tire pressure sensor monitors the pressure values ​​of each tire of the vehicle in real time and sends the tire pressure values ​​to the vehicle controller. If the tire pressure value is the first tire pressure, the vehicle controller determines that the tire pressure of the vehicle is high at this time, and controls the vehicle to enter a high tire pressure driving mode; if the tire pressure value is less than the second tire pressure, the vehicle controller determines that the tire pressure of the vehicle is low at this time, and controls the vehicle to enter a low tire pressure driving mode; if the tire pressure value is greater than or equal to the second tire pressure and less than or equal to the first tire pressure, the vehicle controller determines that the tire pressure of the vehicle is normal at this time, and controls the vehicle to maintain a normal driving mode.

[0034] Furthermore, the high tire pressure driving mode limits the maximum speed of the vehicle to a preset high tire pressure driving mode safety value through the vehicle controller, reduces vehicle energy consumption by increasing the vehicle output torque loading gradient, and ensures the vehicle's acceleration performance. In addition, the vehicle controller sends instructions to the steering booster to increase the vehicle's steering assist torque at low speeds to enhance the vehicle's steering assist capability under high tire pressure conditions. At the same time, the on-board control screen reminds the user through text or voice that the vehicle has entered the high tire pressure driving mode, wherein the setting of the high tire pressure driving mode safety value is positively correlated to the degree to which the tire pressure value exceeds the first tire pressure.

[0035] Furthermore, the low tire pressure driving mode limits the maximum speed of the vehicle to a preset low tire pressure driving mode safety value through the vehicle controller, reduces the vehicle's energy consumption by reducing the vehicle's output torque loading gradient, and prevents the vehicle from slipping during sudden acceleration. In addition, the vehicle controller sends instructions to the steering booster to reduce the vehicle's steering assist torque at low speeds to prevent the vehicle from erratic steering. At the same time, the on-board control screen reminds the user through text or voice that the vehicle has entered the low tire pressure driving mode, wherein the setting of the low tire pressure driving mode safety value is negatively correlated to the degree to which the tire pressure value is lower than the second tire pressure.

[0036] In some embodiments, a drivability control system for an electric vehicle associated with tire pressure includes:

[0037] The sensor module is used to obtain tire pressure values ​​in real time and send them to the vehicle controller;

[0038] The vehicle control module is used to determine whether the tire pressure value is greater than the first tire pressure, and if so, control the vehicle to enter a high tire pressure driving mode; otherwise, determine whether the tire pressure value is less than the second tire pressure, and if so, control the vehicle to enter a low tire pressure driving mode, otherwise, maintain a normal driving mode;

[0039] High tire pressure driving module, used to remind the user through the vehicle control screen, limit the vehicle's maximum speed to a preset high tire pressure driving mode safety value through the vehicle controller, increase the torque loading gradient through the vehicle controller, and increase the wheel steering assist torque through the steering booster;

[0040] The low tire pressure driving module is used to remind the user through the vehicle control screen, limit the vehicle's maximum speed to a preset low tire pressure driving mode safety value through the vehicle controller, reduce the torque loading gradient through the vehicle controller, and reduce the wheel steering assist torque through the steering booster.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drivability control method for an electric vehicle associated with tire pressure, characterized in that: include: The tire pressure value is obtained in real time through the tire pressure sensor and sent to the vehicle controller; The vehicle controller determines whether the tire pressure value is greater than the first tire pressure. If so, the vehicle is controlled to enter a high tire pressure driving mode. Otherwise, the vehicle controller determines whether the tire pressure value is less than the second tire pressure. If so, the vehicle is controlled to enter a low tire pressure driving mode. Otherwise, the normal driving mode is maintained.

2. The method for controlling the driving performance of an electric vehicle in relation to tire pressure according to claim 1, characterized in that: The high tire pressure driving mode includes reminding the user through the vehicle control screen, limiting the vehicle's maximum speed to a preset high tire pressure driving mode safety value through the vehicle controller, increasing the torque loading gradient through the vehicle controller, and increasing the wheel steering assist torque through the steering booster.

3. The method for controlling the driving performance of an electric vehicle in relation to tire pressure according to claim 1, characterized in that: The low tire pressure driving mode includes reminding the user through the vehicle control screen, limiting the vehicle's maximum speed to a preset low tire pressure driving mode safety value through the vehicle controller, reducing the torque loading gradient through the vehicle controller, and reducing the wheel steering assist torque through the steering booster.

4. The method for controlling the driving performance of an electric vehicle in relation to tire pressure according to claim 1, characterized in that: The first tire pressure is greater than the second tire pressure.

5. The method for controlling the driving performance of an electric vehicle in relation to tire pressure according to claim 2 or 3, characterized in that: The vehicle-mounted control screen prompts the user including text prompts and voice prompts.

6. The method for controlling the driving performance of an electric vehicle in relation to tire pressure according to claim 3, characterized in that: The setting of the high tire pressure driving mode safety value is positively correlated with the degree to which the tire pressure value exceeds the first tire pressure.

7. The method for controlling the driving performance of an electric vehicle in relation to tire pressure according to claim 3, characterized in that: The setting of the low tire pressure driving mode safety value is negatively correlated with the degree to which the tire pressure value is lower than the second tire pressure.

8. A driving control system for an electric vehicle associated with tire pressure, characterized in that: include: The sensor module is used to obtain tire pressure values ​​in real time and send them to the vehicle controller; The vehicle control module is used to determine whether the tire pressure value is greater than the first tire pressure. If so, the vehicle is controlled to enter a high tire pressure driving mode. Otherwise, the tire pressure value is determined to be less than the second tire pressure. If so, the vehicle is controlled to enter a low tire pressure driving mode. Otherwise, the normal driving mode is maintained.

9. The driving performance control system of an electric vehicle associated with tire pressure according to claim 8, characterized in that: Also includes: The high tire pressure driving module is used to remind the user through the vehicle control screen, limit the vehicle's maximum speed to a preset high tire pressure driving mode safety value through the vehicle controller, increase the torque loading gradient through the vehicle controller, and increase the wheel steering assist torque through the steering booster.

10. The driving performance control system of an electric vehicle associated with tire pressure according to claim 8, characterized in that: Also includes: The low tire pressure driving module is used to remind the user through the vehicle control screen, limit the vehicle's maximum speed to a preset low tire pressure driving mode safety value through the vehicle controller, reduce the torque loading gradient through the vehicle controller, and reduce the wheel steering assist torque through the steering booster.

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