Vehicle braking control device

Patent metadata

Field	Value
Publication number	US-11485332-B2
Application number	US-201917277843-A
Country	US
Kind code	B2
Filing date	Oct 25, 2019
Priority date	Oct 29, 2018
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

In a braking control device, a controller is configured to determine an inside and an outside of a turn by using the yaw rate, to calculate a deflection index based on a standard turning amount corresponding to a steering angle and an actual turning amount corresponding to a yaw rate, to reduce the braking torque of the rear wheel on the outside of the vehicle turn based on the deflection index when an excessive deceleration slip of the rear wheel on the inside of the vehicle turn is inhibited during an execution of anti-skid control.

First claim

The invention claimed is:

1. A vehicle braking control device for a vehicle including four wheels, the vehicle braking control device, comprising:
an actuator configured to individually adjust braking torque of each wheel of a vehicle;
wheel speed sensors configured to each detect speed of the wheel;
a yaw rate sensor configured to detect a yaw rate of the vehicle;
a steering angle sensor configured to detect a steering angle of the vehicle; and
a controller
configured to control the actuator to adjust individually each of braking torques of rear wheels that are a rear right wheel or a rear left wheel by using the steering angle,
configured to determine an inside and an outside of a turn by using the yaw rate,
configured to calculate a deflection index by using a standard turning amount corresponding to the steering angle and an actual turning amount corresponding to the yaw rate, configured to reduce the braking torque of the rear wheel on the outside of the turn by using the deflection index when an excessive deceleration slip of the rear wheel on the inside of the turn is inhibited during an execution of anti-skid control.

2. A vehicle braking control device for a vehicle including four wheels, the vehicle braking control device, comprising:
an actuator configured to individually adjust braking torque of each wheel of a vehicle;
wheel speed sensors configured to each detect speed of the wheel;
a yaw rate sensor configured to detect a yaw rate of the vehicle;
a steering angle sensor configured to detect a steering angle of the vehicle; and
a controller
configured to control the actuator to adjust individually each of braking torques of rear wheels that are a rear right wheel or a rear left wheel by using the steering angle,
configured to determine by using the speed of each wheel that the vehicle is on a split coefficient of friction road surface, to determine which the rear wheel is on a lower coefficient of friction road surface, to determine which the rear wheel is on a higher coefficient of friction road surface
configured to calculate a deflection index by using a standard turning amount corresponding to the steering angle and an actual turning amount corresponding to the yaw rate, and
configured to reduce the braking torque of the rear wheel on the higher coefficient of friction road surface by using the deflection index when an excessive deceleration slip of the rear wheel on the lower coefficient of friction road surface is inhibited during an execution of anti-skid control.

Assignees

• Advics Co Ltd

Inventors

• Terasaka Masato
• Kitahara Chisa

Classifications

• B60T2250/03

  Vehicle yaw rate · CPC title

• B60T2260/024

  Yawing moment compensation during mu-split braking · CPC title

• B60T2210/124

  Roads with different friction levels · CPC title

• B60T8/1764

  Regulation during travel on surface with different coefficients of friction, e.g. between left and right sides, mu-split {or between front and rear} · CPC title

• B60T2201/16

  Curve braking control, e.g. turn control within ABS control algorithm · CPC title