Brake control device for vehicles

Patent metadata

Field	Value
Publication number	US-10766470-B2
Application number	US-201716304958-A
Country	US
Kind code	B2
Filing date	May 26, 2017
Priority date	May 27, 2016
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

This brake control device includes: an operation amount sensor which detects the brake operating member operation amount; front-wheel and rear-wheel actuators which generate braking force in front/rear wheels; front-wheel and rear-wheel sensors which detect the outputs of the front-wheel and rear-wheel actuators; and a controller which controls the front-wheel and rear-wheel actuators based on the operation amount and the outputs of the front and rear wheels. On the basis of the operation amount and/or the output of the rear wheels, the controller determines whether or not a long-term low-load state in which the friction member is continuously pressed against the rotary members of the rear wheels within a predetermined range over a long period of time is established. If so, the distribution ratio of the rear-wheel braking force to the total applied braking force is decreased compared to when a long-term low-load state is not determined to be established.

First claim

The invention claimed is:

1. A brake control device for a vehicle comprising:
an operation amount sensor that detects an operation amount of a brake operating member of a vehicle;
a front-wheel actuator that presses a friction member against a front-wheel rotary member integrally rotating with a front wheel of the vehicle and thereby generates a front-wheel braking force in said front wheel;
a rear-wheel actuator that presses a friction member against a rear-wheel rotary member integrally rotating with a rear wheel of the vehicle and thereby generates a rear-wheel braking force in said rear wheel;
a front-wheel sensor that detects front-wheel output of the front-wheel actuator;
a rear-wheel sensor that detects rear-wheel output of the rear-wheel actuator; and
a controller that controls the front-wheel actuator and the rear-wheel actuator on the basis of the operation amount, the front-wheel output, and the rear-wheel output, wherein
the controller is configured to
determine whether a long-term low-load state where the friction member is continuously pressed against the rear-wheel rotary member over a long period of time in a state within a specified range is established on the basis of the operation amount and/or the rear-wheel output, and
in the case where it is determined that the long-term low-load state is established, decrease a distribution ratio of the rear-wheel braking force to a total braking force applied to the vehicle in comparison with the case where it is not determined that the long-term low-load state is established.

2. The brake control device for the vehicle according to claim 1 , wherein
the controller is configured to
calculate occurrence frequency of the state within the specified range, and
decrease the distribution ratio on the basis of the occurrence frequency.

Assignees

• Advics Co Ltd

Inventors

• Yukoku Shinichiro
• Hishikawa Takahisa

Classifications

• B60T2210/30

  Environment conditions or position therewithin · CPC title

• B60T8/1766

  Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle · CPC title

• B60T2220/04

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

• F16D61/00

  Brakes with means for making the energy absorbed available for use (F16D57/00 takes precedence) · CPC title

• B60T2270/604

  Merging friction therewith; Adjusting their repartition · CPC title