Vehicle control system, controlling method thereof and brake apparatus

Patent metadata

Field	Value
Publication number	US-2019366993-A1
Application number	US-201916426404-A
Country	US
Kind code	A1
Filing date	May 30, 2019
Priority date	May 30, 2018
Publication date	Dec 5, 2019
Grant date	—

Abstract

Disclosed herein is a vehicle control system capable of improving driving stability and providing safe fun driving to a driver by varying and controlling a regenerative braking torque generated by a motor during coasting. The vehicle control system according to an embodiment of the disclosure includes: a motor configured to provide a driving force to a wheel; a wheel sensor configured to detect a rotational speed of the wheel; and a controller configured to control the motor to generate a first regenerative braking torque during coasting, and to control the motor to generate a second regenerative braking torque lower than the first regenerative braking torque when a wheel slip of the wheel is detected based on an output of the wheel sensor.

First claim

What is claimed is:

1 . A vehicle control system comprising:
a motor configured to provide a driving force to a wheel; a wheel sensor configured to detect a rotational speed of the wheel; and a controller configured to control the motor to generate a first regenerative braking torque during coasting, and to control the motor to generate a second regenerative braking torque lower than the first regenerative braking torque when a wheel slip of the wheel is detected based on an output of the wheel sensor.

2 . The vehicle control system according to claim 1 , further comprising:
an accelerator pedal configured to receive an acceleration command from a driver; and a brake pedal configured to receive a brake command from the driver, wherein the controller is configured to control the motor to generate the first regenerative braking torque when the acceleration command and the brake command are not received.

3 . The vehicle control system according to claim 1 , further comprising:
an inputter configured to receive a regenerative braking level from a driver, wherein the controller is configured to determine a magnitude of the first regenerative braking torque based on the regenerative braking level.

4 . The vehicle control system according to claim 3 , wherein the controller is configured to determine a magnitude of the second regenerative braking torque based on the braking efficiency.

5 . The vehicle control system according to claim 1 , wherein the controller is configured to determine the wheel slip based on a result of comparing a wheel slip value calculated based on the rotational speed of the wheel with a predetermined reference value.

6 . The vehicle control system according to claim 5 , wherein the reference value is determined based on at least one of the vehicle speed, the regenerative braking level, and a state of a road surface.

7 . A method of controlling a vehicle control system comprising:
rotating a wheel by a motor; generating a first regenerative braking torque by the motor during coasting; detecting a rotational speed of the wheel during coasting; and generating a second regenerative braking torque lower than the first regenerative braking torque during coasting by the motor when a wheel slip is detected based on an output of the wheel sensor.

8 . The method according to claim 7 , wherein the generating of the first regenerative braking torque comprises:
generating the first regenerative braking torque when an acceleration command and a brake command are not received.

9 . The method according to claim 8 , further comprising:
receiving a regenerative braking level from a driver, wherein the generating of the first regenerative braking torque comprises: determining a magnitude of the first regenerative braking torque based on the regenerative braking level.

10 . The method according to claim 7 , wherein the generating of the second regenerative braking torque comprises:
determining a magnitude of the second regenerative braking torque based on the braking efficiency.

11 . The method according to claim 7 , wherein the detecting of the wheel slip based on an output of the wheel sensor comprises:
determining the wheel slip based on a result of comparing a wheel slip value calculated based on the rotational speed of the wheel with a predetermined reference value.

12 . The method according to claim 11 , wherein the reference value is determined based on at least one of the vehicle speed, the regenerative braking level, and a state of a road surface.

13 . A braking device of braking a vehicle comprising a motor configured to drive a wheel and a driving device configured to control the motor, the braking device comprising:
a wheel sensor configured to detect a rotational speed of the wheel; and a controller configured to:
receive information about a first regenerative braking torque from the driving device during coasting;
determine a wheel slip of the wheel based on an output of the wheel sensor; and
transmit information about a second regenerative braking torque to the driving device such that the motor generates the second regenerative braking torque lower than the first regenerative braking torque in response to the determination of the wheel slip.

14 . The braking device according to claim 13 , wherein the controller is configured to determine a magnitude of the second regenerative braking torque based on the braking efficiency.

15 . The braking device according to claim 13 , wherein the controller is configured to determine the wheel slip based on a result of comparing a wheel slip value calculated based on the rotational speed of the wheel with a predetermined reference value.

16 . The braking device according to claim 15 , wherein the reference value is determined based on at least one of the vehicle speed, the regenerative braking level, and a state of a road surface.

Assignees

• Mando Corp

Inventors

• Park In Hye

Classifications

• B60L2240/423

  Torque · CPC title

• B60L15/2009

  for braking · CPC title

• B60W2422/70

  on the wheel or the tyre · CPC title

• B60T8/17552 Primary

  responsive to the tyre sideslip angle or the vehicle body slip angle · CPC title

• B60W2520/26

  Wheel slip · CPC title