# US 2017/0282875 A1 · Vehicle brake control device

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- Number: US 2017/0282875 A1
- Document ID: US20170282875A1
- Status: Published application
- Kind: A1
- Application number: 15/471,463
- Filed: 2017-03-28
- Published: 2017-10-05
- Earliest claimed: 2016-03-30
- Assignees: Autoliv Nissin Brake Systems Japan Co., Ltd.
- Applicants: Autoliv Nissin Brake Systems Japan Co., Ltd.
- Inventors: Keisuke WAKIZAKA
- Web page: https://patentgrep.com/patent/US20170282875A1

## CPC

- B60T 8/28: responsive to deceleration {(B60T8/261, B60T8/262, B60T8/266 take precedence)}
- B60T 8/17551: {determining control parameters related to vehicle stability used in the regulation, e.g. by calculations involving measured or detected parameters}
- B60T 8/1766: Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
- B60T 8/246: {Change of direction}
- B60T 8/74: sensing a rate of change of velocity
- B60T 13/686: {in hydraulic systems or parts thereof}
- B60T 2201/16: Curve braking control, e.g. turn control within ABS control algorithm
- 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

## Abstract

A vehicle brake control device includes a wheel deceleration calculating unit configured to calculate a wheel deceleration of each of wheels of a vehicle, and a front and rear wheel braking distribution controlling unit configured to execute a front and rear wheel braking distribution control for distributing a braking force on front and rear wheels. The front and rear wheel braking distribution controlling unit is configured to start the front and rear wheel braking distribution control on front and rear wheels of one of left and right sides if an absolute value of a wheel deceleration of the front wheel is equal to or larger than a first threshold and an absolute value of a wheel deceleration of the rear wheel is equal to or larger than a second threshold.

## Claims

### Claim 1

A vehicle brake control device comprising:
a wheel deceleration calculating unit configured to calculate a wheel deceleration of each of wheels of a vehicle; and
a front and rear wheel braking distribution controlling unit configured to execute a front and rear wheel braking distribution control for distributing a braking force on front and rear wheels,
wherein the front and rear wheel braking distribution controlling unit is configured to start the front and rear wheel braking distribution control on front and rear wheels of one of left and right sides if an absolute value of a wheel deceleration of the front wheel is equal to or larger than a first threshold and an absolute value of a wheel deceleration of the rear wheel is equal to or larger than a second threshold.

### Claim 2 (depends on 1)

The vehicle brake control device according to claim 1,
wherein during turning of the vehicle, the front and rear wheel braking distribution controlling unit is configured to set the first threshold and the second threshold to have a smaller value in a case where the front and rear wheels of the one side correspond to inner turning wheels than a case where the front and rear wheels of the one side correspond to outer turning wheels.

### Claim 3 (depends on 2)

The vehicle brake control device according to claim 2 further comprising a lateral acceleration acquiring unit configured to acquire a lateral acceleration,
wherein the front and rear wheel braking distribution controlling unit is configured to set the first threshold and the second threshold to have a smaller value as the lateral acceleration acquired by the lateral acceleration acquiring unit is increased.

### Claim 4 (depends on 1)

The vehicle brake control device according to claim 1 further comprising a vehicle speed calculating unit configured to calculate a vehicle speed,
wherein the front and rear wheel braking distribution controlling unit is configured to set the first threshold and the second threshold to have a smaller value as the vehicle speed acquired by the vehicle speed calculating unit is increased.

### Claim 5 (depends on 2)

The vehicle brake control device according to claim 2 further comprising a vehicle speed calculating unit configured to calculate a vehicle speed,
wherein the front and rear wheel braking distribution controlling unit is configured to set the first threshold and the second threshold to have a smaller value as the vehicle speed acquired by the vehicle speed calculating unit is increased.

### Claim 6 (depends on 3)

The vehicle brake control device according to claim 3 further comprising a vehicle speed calculating unit configured to calculate a vehicle speed,
wherein the front and rear wheel braking distribution controlling unit is configured to set the first threshold and the second threshold to have a smaller value as the vehicle speed acquired by the vehicle speed calculating unit is increased.