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US 12,162,460 B2Granted
Method for controlling brake fluid pressure using ESC system
AssigneesHyundai Motor Company, Kia Corporation
InventorHo Hyun Cha
Life of this patent
Estimating the term…
Abstract
A method for controlling a brake fluid pressure using an ESC system in a vehicle is to reduce the braking distance and increase braking safety of a vehicle on a wet road surface by performing brake fluid pressure control based on precipitation data.
Claims20
A method for controlling a brake fluid pressure using an Electronic Stability Control (ESC) system, the method comprising:
- inducing, by the ESC system, a vehicle to be decelerated when an actual wheel slip of the vehicle is greater than a first wheel slip which is determined in accordance with real-time precipitation;
- increasing, by the ESC system, the brake fluid pressure, which is supplied to a wheel brake of the ESC system, to a first predetermined fluid pressure value, in accordance with the real-time precipitation, actual deceleration of the vehicle, and a first deceleration coefficient determined in accordance with the real-time precipitation, through a hydraulic modulator of the ESC system when it is detected that the vehicle is decelerated;
- determining, by the ESC system, whether it is required to additionally increase the brake fluid pressure which is supplied to the wheel brake based on the actual deceleration, an actual wheel slip ratio, and a second deceleration coefficient determined in accordance with the actual wheel slip ratio after increasing the brake fluid pressure;
- and
- additionally increasing, by the ESC system, the brake fluid pressure which is supplied to the wheel brake to a second predetermined fluid pressure value, depending on the real-time precipitation, the actual deceleration, and the first deceleration coefficient when determining that it is required to additionally increase the brake fluid pressure.
2 more elements
An Electronic Stability Control (ESC) system for controlling a brake fluid pressure, the ESC system comprising:
- a brake master cylinder and a wheel brake;
- a hydraulic modulator between the brake master cylinder and the wheel brake, wherein the hydraulic modulator is configured to increase or decrease the brake fluid pressure which is supplied to the wheel brake from the brake master cylinder;
- and
- a controller electrically connected to the hydraulic modulator, wherein the controller is configured for:
- inducing a vehicle to be decelerated when an actual wheel slip of the vehicle is greater than a first wheel slip which is determined in accordance with real-time precipitation;
- increasing the brake fluid pressure, which is supplied to the wheel brake, to a first predetermined fluid pressure value, in accordance with the real-time precipitation, actual deceleration of the vehicle, and a first deceleration coefficient determined in accordance with the real-time precipitation, through the hydraulic modulator of the ESC system when the controller concludes that the vehicle is decelerated;
- determining whether it is required to additionally increase the brake fluid pressure which is supplied to the wheel brake based on the actual deceleration, an actual wheel slip ratio, and a second deceleration coefficient determined in accordance with the actual wheel slip ratio after increasing the brake fluid pressure;
- and
- additionally increasing the brake fluid pressure which is supplied to the wheel brake, to a second predetermined fluid pressure value, depending on the real-time precipitation, the actual deceleration, and the first deceleration coefficient when determining that it is required to additionally increase the brake fluid pressure.
6 more elements
Dependencies are inferred from the claim text.