Turning behavior control apparatus for a vehicle

Patent metadata

Field	Value
Publication number	US-11040706-B2
Application number	US-201916580679-A
Country	US
Kind code	B2
Filing date	Sep 24, 2019
Priority date	Sep 25, 2018
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A turning behavior control apparatus that is applied to a vehicle includes front wheel suspensions and rear wheel suspensions having anti-dive and anti-lift geometries, respectively, and left and right front wheels are steered wheels. The turning behavior control apparatus includes a control unit for controlling the braking device, and the control unit is configured to control the braking device to apply a braking force to a turning inner driving wheel when a deviation between a standard yaw rate of the vehicle and an actual yaw rate exceeds a deviation reference value and a time change rate of the deviation exceeds a start reference value in a situation where the vehicle is turning without braking.

First claim

What is claimed is:

1. A behavior control apparatus for a vehicle that is applied to a vehicle which comprises front wheel, suspensions and rear wheel suspensions having anti-dive and anti-lift geometries, respectively, and a braking device configured to independently apply braking forces to left and right front wheels and left and right rear wheels, and the left and right front wheels are steered wheels, wherein
the behavior control apparatus comprises a control unit for controlling the braking device, and the control unit is configured to control the braking device to apply a braking force to a turning inner driving wheel when a deviation between a standard yaw rate of the vehicle and an actual yaw rate exceeds a deviation reference value and a time change rate of the deviation exceeds a start reference value in a situation where the vehicle is turning without braking.

2. The behavior control apparatus for a vehicle according to claim 1 , wherein the control unit is configured to calculate a target value of the braking force to be applied to the turning inner driving wheel based on at least the time change rate of the deviation so as to increase as the time change rate of the deviation increases and control the braking device such that a braking force applied to the turning inner driving wheel becomes the target value.

3. The behavior control apparatus for a vehicle according to claim 1 , wherein the control unit is configured to correct a magnitude of the target value to be equal to or less than twice a driving force of the turning inner driving wheel when the magnitude of the target value exceeds twice the driving force of the turning inner driving wheel.

4. The behavior control apparatus for a vehicle according to claim 1 , wherein the control unit is configured to end the application of the braking force to the turning inner driving wheel when the time change rate of the deviation becomes less than an end reference value even if the deviation exceeds the deviation reference value.

Assignees

• Toyota Motor Co Ltd

Inventors

• Shoji Takuya

Classifications

• B60T8/1755 Primary

  Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve (road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02) · CPC title

• B60T8/241

  Lateral vehicle inclination · CPC title

• B60W30/045

  Improving turning performance · CPC title

• B60W40/114

  Yaw movement · CPC title

• B60W40/076

  Slope angle of the road · CPC title