Electromechanical brake system and control method thereof

Patent metadata

Field	Value
Publication number	US-12491850-B2
Application number	US-202318228670-A
Country	US
Kind code	B2
Filing date	Jul 31, 2023
Priority date	Feb 21, 2023
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

Disclosed herein are an electromechanical brake system and a control method thereof. In accordance with one aspect of the present disclosure, there is provided an electromechanical brake system including electromechanical brakes respectively provided on four wheels of a vehicle, a sensor part that outputs a signal which corresponds to or is capable of estimating whether each of the electromechanical brakes is normal and a driver demand braking torque generated based on the speed and lateral acceleration of the vehicle and a brake pedal operation of a driver, and a controller that estimates a demand braking torque based on the signal received from the sensor part and determines whether the electromechanical brakes are normal, wherein the controller performs a braking control as much as the demand braking torque based on the determination that the electromechanical brakes are normal, and performs a braking control by distributing, within a range of the demand braking torque, braking torques based on the lateral acceleration of the vehicle to the respective other electromechanical brakes except the electromechanical brake determined to malfunction based on the determination that there is a malfunction of any one among the electromechanical brakes.

First claim

What is claimed is:

1 . An electromechanical brake system comprising:
electromechanical brakes respectively provided on four wheels of a vehicle; a sensor part configured to output a signal corresponding to or being capable of estimating whether each of the electromechanical brakes is normal and a driver demand braking torque generated based on the speed and lateral acceleration of the vehicle and a brake pedal operation of a driver; and a controller configured to estimate a demand braking torque based on the signal received from the sensor part and determine whether the electromechanical brakes are normal, wherein the controller is configured to: perform a braking control as much as the demand braking torque based on the determination that the electromechanical brakes are normal, and perform a braking control by distributing in a specific pattern, within a range of the demand braking torque, braking torques based on a position of the malfunctioning electromechanical brake and a state of the vehicle including straight movement, left turning, or right turning to the respective other electromechanical brakes except the electromechanical brake determined to malfunction in response to the determination that there is a malfunction of any one among the electromechanical brakes.

2 . The electromechanical brake system of claim 1 , wherein the controller is configured to estimate the demand braking torque based on a larger value between the driver demand braking torque and an advanced driver assistance system (ADAS) demand braking torque according to an ADAS function.

3 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a left front wheel of the vehicle; and during the straight movement of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a right rear wheel of the vehicle to be smaller than the braking torques of the electromechanical brakes provided on a right front wheel and a left rear wheel of the vehicle.

4 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a left front wheel of the vehicle; and during the left turning of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a left rear wheel of the vehicle to be smaller than the braking torques of the electromechanical brakes provided on a right front wheel and a right rear wheel of the vehicle.

5 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a left front wheel of the vehicle; and during the right turning of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a left rear wheel of the vehicle to be larger than the braking torques of the electromechanical brakes provided on a right front wheel and a right rear wheel of the vehicle.

6 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a right front wheel of the vehicle; and during the straight movement of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a left rear wheel of the vehicle to be smaller than the braking torques of the electromechanical brakes provided on a left front wheel and a right rear wheel of the vehicle.

7 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a right front wheel of the vehicle; and during the left turning of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a right rear wheel of the vehicle to be larger than the braking torques of the electromechanical brakes provided on a left front wheel and a left rear wheel of the vehicle.

8 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a right front wheel of the vehicle; and during the right turning of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a right rear wheel of the vehicle to be smaller than the braking torques of the electromechanical brakes provided on a left front wheel and a left rear wheel of the vehicle.

9 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a left rear wheel of the vehicle; and during the straight movement of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a right rear wheel of the vehicle to be smaller than the braking torques of the electromechanical brakes provided on a left front wheel and a right front wheel of the vehicle.

10 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a left rear wheel of the vehicle; and during the left turning of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a left front wheel of the vehicle to be smaller than the braking torques of the electromechanical brakes provided on a right front wheel and a right rear wheel of the vehicle.

11 . The electromechanical brake system of claim 1 , wherein:
the controller determines that there is a malfunction of the electromechanical brake provided on a left rear wheel of the vehicle; and during the right turning of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a left front wheel of the vehicle to be larger than the braking torques of the electromechanical brakes provided on a right front wheel and a right rear wheel of the vehicle.

12 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a right rear wheel of the vehicle; and during the straight movement of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a left rear wheel of the vehicle to be smaller than the braking torques of the electromechanical brakes provided on a left front wheel and a right front wheel of the vehicle.

13 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical brake provided on a right rear wheel of the vehicle; and during the left turning of the vehicle, the controller is configured to distribute the braking torque of the electromechanical brake provided on a right front wheel of the vehicle to be larger than the braking torques of the electromechanical brakes provided on a left front wheel and a left rear wheel of the vehicle.

14 . The electromechanical brake system of claim 1 , wherein:
the controller is configured to determine that there is a malfunction of the electromechanical bra

Assignees

• Hl Mando Corp

Inventors

• Kim Seongnam

Classifications

• B60T17/221 Primary

  Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M) · CPC title

• B60T2270/402

  Back-up · CPC title

• B60T2220/04

  Pedal travel sensor, stroke sensor; Sensing brake request · CPC title

• B60Y2306/13

  Failsafe arrangements · CPC title

• B60Y2400/81

  Braking systems · CPC title