Vehicle braking control device

Patent metadata

Field	Value
Publication number	US-11511714-B2
Application number	US-201816756266-A
Country	US
Kind code	B2
Filing date	Oct 25, 2018
Priority date	Oct 25, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

This vehicle braking control device executes automatic braking control to adjust a braking torque on the basis of a vehicle target deceleration value corresponding to a distance between the vehicle and an object in front of the vehicle, and executes anti-skid control to suppress excessive wheel slip by adjusting the braking torque on the basis of a wheel speed. The braking control device calculates an actual deceleration value corresponding to the target deceleration value, and executes feedback control on the basis of the target deceleration value and the actual deceleration value such that the actual deceleration value approaches the target deceleration value. The configuration is such that a control gain of the feedback control is reduced when anti-skid control is executed. Further, the configuration may be such that execution of feedback control is prohibited when anti-skid control is executed.

First claim

The invention claimed is:

1. A vehicle braking control device that applies a braking torque to wheels of the vehicle, the braking control device comprising:
a controller that executes
an automatic braking control for executing a feedforward control and a feedback control to adjust the braking torque based on a target deceleration value of the vehicle corresponding to a distance between an object in front of the vehicle and the vehicle, and
an anti-skid control for adjusting the braking torque based on a speed of the wheels to suppress excessive slip of the wheels, wherein

the controller is configured to
calculate an actual deceleration value corresponding to the target deceleration value,
execute the feedforward control based on the target deceleration value and the feedback control based on the target deceleration value and the actual deceleration value to bring the actual deceleration value closer to the target deceleration value, and
prohibit the execution of the feedback control when the anti-skid control is executed.

2. The vehicle braking control device according to claim 1 , wherein
the controller is configured to determine either one of a decrease mode for decreasing the braking torque and an increasing mode for increasing the braking torque based on the speed in the anti-skid control, and to, in a state in which the feedback control has been prohibited, resume the execution of the feedback control at a time point in which the increasing mode has been continuously determined for all the wheels for a predetermined time.

Assignees

• Advics Co Ltd

Inventors

• Terasaka Masato
• Kitahara Chisa

Classifications

• B60T2210/12

  Friction · CPC title

• B60T13/741

  acting on an ultimate actuator · CPC title

• B60T8/86

  wherein the brakes are automatically applied in accordance with a speed condition and having means for overriding the automatic braking device when a skid condition occurs · CPC title

• B60T8/1761 Primary

  responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure · CPC title

• B60T17/22

  Devices for monitoring or checking brake systems; Signal devices · CPC title