# US 10,766,470 B2 · Brake control device for vehicles

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- Number: US 10,766,470 B2
- Document ID: US10766470B2
- Status: Granted
- Kind: B2
- Application number: 16/304,958
- Filed: 2017-05-26
- Published: 2020-05-28
- Granted: 2020-09-08
- Earliest claimed: 2016-05-27
- Assignees: Advics Co., Ltd.
- Applicants: Advics Co., Ltd.
- Inventors: Shinichiro Yukoku; Takahisa Hishikawa
- Web page: https://patentgrep.com/patent/US10766470B2

## CPC

- B60T 8/30: responsive to load {(B60T8/261, B60T8/262, B60T8/266 take precedence)}
- B60T 13/662: {characterised by specified functions of the control system components}
- B60T 1/10: by utilising wheel movement for accumulating energy, e.g. driving air compressors
- B60T 8/1766: Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
- B60T 13/586: {the retarders being of the electric type}
- B60T 13/588: {both fluid and mechanical assistance or drive}
- F16D 61/00: Brakes with means for making the energy absorbed available for use (F16D57/00 takes precedence)
- B60T 2201/04: Hill descent control
- B60T 2210/30: Environment conditions or position therewithin
- B60T 2220/04: Pedal travel sensor, stroke sensor; Sensing brake request
- B60T 2270/604: Merging friction therewith; Adjusting their repartition
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.