Vehicle braking force controlling apparatus

Patent metadata

Field	Value
Publication number	US-10220821-B2
Application number	US-201715669265-A
Country	US
Kind code	B2
Filing date	Aug 4, 2017
Priority date	Sep 7, 2016
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A vehicle braking force controlling apparatus includes a steered start detector and a controller. The steered start detector detects steered start of a vehicle on a basis of a driving state of the vehicle. The vehicle has a plurality of wheels. The steered start is start of the vehicle in which steering is performed. The controller applies braking force to a turning inner front wheel and braking force to a turning outer rear wheel when the steered start of the vehicle is detected by the steered start detector. The turning inner front wheel is a front wheel of the plurality of wheels which is located on inner side upon turning of the vehicle. The turning outer rear wheel is a rear wheel of the plurality of wheels which is located on outer side upon the turning of the vehicle.

First claim

The invention claimed is:

1. A vehicle braking force controlling apparatus comprising:
at least one processor; and
a machine-readable medium storing instructions, which when executed by the at least one processor, cause the at least one processor to perform operations comprising:
detecting, based on a driving state of a vehicle that is detected by one or more sensors, a steered start in which the vehicle starts moving from a stopped state while a steering wheel of the vehicle is turned, the vehicle having a plurality of wheels that moves according to the steering wheel of the vehicle, the plurality of wheels including a set of front wheels and a set of rear wheels; and

applying, in response to detecting the steered start of the vehicle, braking force to a turning inner front wheel of the set of front wheels and braking force to a turning outer rear wheel of the set of rear wheels, wherein
the turning inner front wheel which is located on an inner side of a turn made by the vehicle when turning the steering wheel, and
the turning outer rear wheel which is located on an outer side of the turn made by the vehicle when turning the steering wheel.

2. The vehicle braking force controlling apparatus according to claim 1 , wherein the braking force applied to the turning inner front wheel and the braking force applied to the turning outer rear wheel are each set in advance on a basis of one or more of a steering angle, an accelerator position, and a speed of pressing down on an accelerator pedal of the vehicle.

3. The vehicle braking force controlling apparatus according to claim 2 , wherein the braking force applied to the turning inner front wheel and the braking force applied to the turning outer rear wheel are released after an elapse of a braking force application time, the braking force application time is set in advance on a basis of one or more of a steering angle, an accelerator position, and a speed of pressing down on an accelerator pedal of the vehicle.

4. The vehicle braking force controlling apparatus according to claim 3 , wherein the the braking force application time is set to be longer when a traction control that prevents idling of the plurality of wheels is activated.

5. The vehicle braking force controlling apparatus according to claim 2 , wherein
the vehicle includes, as the plurality of wheels, a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel, and
the vehicle includes a brake system comprising a X piping system, the brake system including a first brake circuit that performs braking of the left front wheel and the right rear wheel and a second brake circuit that performs braking of the right front wheel and the left rear wheel.

6. The vehicle braking force controlling apparatus according to claim 1 , wherein the braking force applied to the turning inner front wheel and the braking force applied to the turning outer rear wheel are released after an elapse of a braking force application time, the braking force application time is set in advance on a basis of one or more of a steering angle, an accelerator position, and a speed of pressing down on an accelerator pedal of the vehicle.

7. The vehicle braking force controlling apparatus according to claim 6 , wherein the the braking force application time is set to be longer when a traction control that prevents idling of the plurality of wheels is activated.

8. The vehicle braking force controlling apparatus according to claim 1 , wherein
the vehicle includes, as the plurality of wheels, a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel, and
the vehicle includes a brake system comprising a X piping system, the brake system including a first brake circuit that performs braking of the left front wheel and the right rear wheel and a second brake circuit that performs braking of the right front wheel and the left rear wheel.

9. A vehicle braking force controlling apparatus comprising:
at least one processor; and
a machine-readable medium storing instructions, which when executed by the at least one processor, cause the at least one processor to perform operations comprising:
detecting, based on a driving state of a vehicle, a steered start in which the vehicle starts moving from a stopped state while a steering wheel of the vehicle is turned, the vehicle having a plurality of wheels; and
in response to detecting the steered start of the vehicle:
releasing only braking force applied to a turning outer front wheel and braking force applied to a turning inner rear wheel; and
applying braking force to a turning inner front wheel and braking force to a turning outer rear wheel,

wherein, during a transition from the stopped state of the vehicle to a moving state of the vehicle, braking force derived from the stopped state is kept, and
wherein the turning outer front wheel is a front wheel of the plurality of wheels, the turning outer front wheel is located on outer side of the turn made by the vehicle when turning the steering wheel,
wherein the turning inner rear wheel is a rear wheel of the plurality of wheels, the turning inner rear wheel is located on inner side of the turn made by the vehicle when turning the steering wheel,
wherein the turning inner front wheel is a front wheel of the plurality of wheels, the turning inner front wheel is located on the inner side of the turn made by the vehicle when turning the steering wheel, and
wherein the turning outer rear wheel is a rear wheel of the plurality of wheels, the turning outer rear wheel is located on the outer side of the turn made by the vehicle when turning the steering wheel.

10. The vehicle braking force controlling apparatus according to claim 9 , wherein the braking force applied to the turning inner front wheel and the braking force applied to the turning outer rear wheel are each set in advance on a basis of one or more of a steering angle, an accelerator position, and a speed of pressing down on an accelerator pedal of the vehicle.

11. The vehicle braking force controlling apparatus according to claim 10 , wherein the braking force applied to the turning inner front wheel and the braking force applied to the turning outer rear wheel are released after an elapse of a braking force application time, the braking force application time is set in advance on a basis of one or more of a steering angle, an accelerator position, and a speed of pressing down on an accelerator pedal of the vehicle.

12. The vehicle braking force controlling apparatus according to claim 11 , wherein the braking force application time is set to be longer when a traction control that prevents idling of the plurality of wheels is activated.

13. The vehicle braking force controlling apparatus according to claim 10 , wherein
the vehicle includes, as the plurality of wheels, a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel, and
the vehicle includes a brake system comprising a X piping system, the brake system including a first brake circuit that performs braking of the left front wheel and the right rear wheel and a second brake circuit that performs braking of the right front wheel and the left rear wheel.

14. The vehicle braking force controlling apparatus according to claim 9 , wherein the braking force applied to the turning inner front wheel and the braking force applied to the turning outer rear wheel respectively comprise the braking force maintained on the turning inner front wheel since the stopped state of the vehicle and the braking force maintained on the turning outer rear wheel since the stopped state of the vehicle.

Assignees

• Subaru Corp

Inventors

• Matsuno Koji

Classifications

• B60T8/48

  connecting the brake actuator to an alternative or additional source of fluid pressure {, e.g. traction control systems} · CPC title

• B60T2201/16

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

• B60T8/171

  Detecting parameters used in the regulation; Measuring values used in the regulation · CPC title

• B60T8/175

  Brake regulation specially adapted to prevent excessive wheel spin during vehicle acceleration, e.g. for traction control (safety devices for propulsion unit control responsive to, or preventing, skidding of wheels B60K28/16) · CPC title

• B60T2220/04

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