Automatic brake application for one pedal driving

Patent metadata

Field	Value
Publication number	US-10351111-B2
Application number	US-201715493016-A
Country	US
Kind code	B2
Filing date	Apr 20, 2017
Priority date	Apr 20, 2017
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

Methods, systems, and apparatus for controlling the braking of a vehicle. The brake control system includes a first sensor for detecting motion data of the vehicle and an electronic control unit connected to the first sensor. The electronic control unit is configured to determine that the vehicle is not in motion based on the motion data. The electronic control unit is configured to predict a brake application event that requires application of a braking force to prevent the vehicle from moving and cause brakes of the vehicle to apply the braking force to prevent the vehicle from moving based on the brake application event.

First claim

What is claimed is:

1. A brake control system for a vehicle, comprising:
a first sensor for detecting motion data of the vehicle; and
an electronic control unit connected to the first sensor and configured to:
determine that the vehicle is stopped based on the motion data,
determine that a brake pedal of the vehicle is in a released position based on an amount of depression of the brake pedal,
predict a brake application event that requires application of a braking force to prevent the vehicle from moving, and
cause brakes of the vehicle to apply the braking force to prevent the vehicle from moving based on the brake application event.

2. The brake control system of claim 1 , wherein the electronic control unit is configured to automatically cause the brakes of the vehicle to apply the braking force without depression of the brake pedal of the vehicle.

3. The brake control system of claim 2 , further comprising:
a user interface for displaying a user indicator; and
wherein the electronic control unit is connected to the user interface and configured to display the user indicator that indicates that the brakes of the vehicle are being applied in response to the braking force being applied without depression of the brake pedal of the vehicle.

4. The brake control system of claim 1 , further comprising:
a second sensor for obtaining sensor data of an external environment surrounding the vehicle; and
wherein the electronic control unit is configured to:
obtain, from the second sensor, the sensor data, and
predict the brake application event based on the sensor data.

5. The brake control system of claim 1 , wherein the sensor data of the external environment surrounding the vehicle includes a distance between another vehicle and the vehicle, wherein the electronic control unit is configured to predict the brake application event when the distance between the another vehicle and the vehicle is less than a threshold distance that indicates that the another vehicle will impact the vehicle, and cause the brakes of the vehicle to apply the braking force in response to the prediction.

6. The brake control system of claim 1 , further comprising:
a second sensor for identifying a driver of the vehicle; and
a memory configured to store driving behavior patterns of the driver;
wherein an amount of the braking force applied to prevent the vehicle from moving is based on the stored driving behavior patterns of the driver.

7. The brake control system of claim 1 , further comprising:
an acceleration input sensor for obtaining additional acceleration data; and
wherein the electronic control unit is configured to:
obtain, from the acceleration input sensor, additional acceleration data that indicates that pressure is being applied to the accelerator pedal,
override the brake application event,
cause the brakes of the vehicle to release, and
apply an acceleration force to move the vehicle.

8. The brake control system of claim 1 , further comprising:
a braking sensor for detecting the amount of depression of the brake pedal of the vehicle that is being applied;
wherein the electronic control unit is configured to
obtain, from the braking sensor, the amount of depression of the brake pedal that is being applied.

9. A brake control system for a vehicle, comprising:
a brake sensor for detecting friction braking data including an indication of whether a brake pedal of the vehicle is depressed;
at least one of a navigation unit or a first sensor for detecting vehicle data; and
an electronic control unit configured to:
obtain, from the brake sensor, braking data,
determine that the brake pedal of the vehicle is not depressed based on the braking data,
determine that the vehicle is not in motion based on the vehicle data, and
automatically cause brakes of the vehicle to apply a braking force to prevent the vehicle from moving.

10. The brake control system of claim 9 , wherein the electronic control unit is configured to automatically cause the brakes of the vehicle to apply the braking force until an acceleration input is received.

11. The brake control system of claim 9 , further comprising:
a second sensor for obtaining sensor data for an external environment surrounding the vehicle;
wherein the electronic control unit is configured to:
obtain, from the second sensor, the sensor data,
predict a brake application event based on the sensor data, and
automatically cause the brakes of the vehicle to apply the braking force based on the brake application event.

12. The brake control system of claim 9 , wherein the electronic control unit is configured to automatically cause the brakes of the vehicle to apply the braking force without depression of the brake pedal of the vehicle.

13. The brake control system of claim 12 , further comprising:
a user interface for obtaining user input and displaying a user indicator;
wherein the electronic control unit is connected to the user interface and configured to display the user indicator that indicates that the brakes of the vehicle are being applied without depression of the brake pedal of the vehicle.

14. The brake control system of claim 9 , further comprising:
a second sensor for identifying a driver of the vehicle; and
a memory configured to store driving behavior patterns for the driver including an amount of pressure applied to the brakes of the vehicle;
wherein an amount of the braking force applied to prevent the vehicle from moving is based on the stored driving behavior patterns for the driver.

15. The brake control system of claim 9 , wherein to determine that the vehicle is not in motion based on the vehicle data the electronic control unit is configured to:
obtain, from the at least one of the navigation unit or the first sensor, the vehicle data, wherein the vehicle data includes at least one of a position, speed or acceleration of the vehicle, and
determine that the vehicle is not in motion based the position of the vehicle over a period of time, the speed or the acceleration of the vehicle.

16. The brake control system of claim 9 , wherein the electronic control unit is configured to:
obtain, from the first sensor, acceleration data that indicates that pressure is being applied to the accelerator pedal,
override the automatic application of the brakes,
cause the brakes of the vehicle to release, and
apply an acceleration force to move the vehicle.

17. A method for controlling braking of the vehicle, comprising:
obtaining, from at least one of a navigation unit or a first sensor, movement information;
determining, by an electronic control unit, that the vehicle is stationary based on the movement information;
determining, by the electronic control unit, that a brake pedal of the vehicle is in a released position based on an amount of depression of the brake pedal;
determining, by the electronic control unit, that there is a brake application event that requires application of a braking force to prevent the vehicle from moving; and
controlling, by the electronic control unit, brakes of the vehicle to apply the braking force.

18. The method of claim 17 , further comprising:
obtaining, by a second sensor, sensor data that includes a measurement of a distance between a rear of the vehicle and an approaching vehicle;
determining, by the electronic control unit, that the approaching vehicle will impact the vehicle when the distance between the rear of the vehicle and the approaching vehicle is less than a threshold distance; and
determining, by

Assignees

• Toyota Eng & Mfg North America

Inventors

• Hernandez Mariano

Classifications

• B60T2210/36

  Global Positioning System [GPS] · CPC title

• B60T2201/022

  Collision avoidance systems · CPC title

• B60T8/3205

  acceleration (B60T8/34, B60T8/52, B60T8/54, B60T8/56, B60T8/58, B60T8/72, B60T8/86, B60T8/88 take precedence) · CPC title

• B60T7/22 Primary

  initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle {, or by means of contactless obstacle detectors mounted on the vehicle} · CPC title

• B60T2220/02

  Driver type; Driving style; Driver adaptive features · CPC title