Brake supplement assist control

Patent metadata

Field	Value
Publication number	US-11142175-B2
Application number	US-201916241829-A
Country	US
Kind code	B2
Filing date	Jan 7, 2019
Priority date	Jan 7, 2019
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

Methods, systems, and apparatus for a brake assist control system. The brake assist control system is for a vehicle. The brake assist control system includes a first sensor configured to detect driver awareness. The brake assist control system includes an electronic control unit. The electronic control unit is coupled to the first sensor. The electronic control unit is configured to determine that a brake pedal and an accelerator pedal are in a released position. The electronic control unit is configured to determine that there is vehicle movement. The electronic control unit is configured to determine that a driver of the vehicle is unaware of the vehicle movement based on the driver awareness. The electronic control unit is configured to reduce or eliminate the vehicle movement.

First claim

What is claimed is:

1. A brake assist control system for a vehicle, comprising:
a first sensor configured to detect an eye or a hand position of a driver of the vehicle, a door position of the vehicle or an engagement of a seatbelt; and
an electronic control unit coupled to the first sensor, the electronic control unit configured to:
determine that a brake pedal and an accelerator pedal are in a released position based on a position of the brake pedal and a position of the accelerator pedal, respectively,
determine that there is vehicle movement,
determine that a driver of the vehicle is unaware of the vehicle movement based on the eye or the hand position of the driver of the vehicle, the door position of the vehicle or the engagement of the seatbelt, and
reduce or eliminate creep torque of the vehicle when the driver is unaware of the vehicle movement.

2. The brake assist control system of claim 1 , further comprising:
a brake pedal sensor coupled to the brake pedal and configured to detect the position of the brake pedal; and
an accelerator pedal sensor coupled to the accelerator pedal and configured to detect the position of the accelerator pedal.

3. The brake assist control system of claim 1 , further comprising:
a second sensor including at least one of an engine sensor configured to detect an applied torque or power to an engine of the vehicle, a vehicle speed sensor configured to detect a speed of the vehicle, or a wheel sensor configured to detect movement of a wheel of the vehicle;
wherein to determine that there is vehicle movement, the electronic control unit is configured to determine that the vehicle is creeping or moving forward based on the applied torque or power to the engine of the vehicle, the speed of the vehicle, or the movement of the wheel of the vehicle.

4. The brake assist control system of claim 1 , wherein the first sensor is a door sensor configured to detect the door position of the vehicle, wherein to determine that the driver of the vehicle is unaware of the vehicle movement the electronic control unit is configured to determine that a door of the vehicle is ajar based on the door position.

5. The brake assist control system of claim 1 , further comprising:
a navigation unit configured to detect a current location of the vehicle and a location of a traffic sign or a traffic signal;
wherein the electronic control unit is further configured to:
obtain, from an external database, the location of the traffic sign or the traffic signal; and
determine that the current location of the vehicle is within a threshold distance of the location of the traffic sign or the traffic signal.

6. The brake assist control system of claim 1 , further comprising:
a second sensor configured to an incline or an angle of a roadway;
wherein to reduce or eliminate the creep torque of the vehicle, the electronic control unit is configured to:
reduce or eliminate the creep torque
when the incline or the angle of the roadway is greater than a threshold angle.

7. The brake assist control system of claim 1 , wherein the electronic control unit is configured to:
determine that the vehicle is not in a park position based on a position of a transmission of the vehicle; and
wherein the electronic control unit is configured to reduce or eliminate the creep torque of the vehicle in response to determining that the vehicle is not in the park position and determining that there is vehicle movement.

8. A brake assist control system, comprising:
a brake pedal;
an accelerator pedal;
a brake pedal sensor coupled to the brake pedal and configured to detect a position of the brake pedal;
an accelerator pedal sensor coupled to the accelerator pedal and configured to detect a position of the accelerator pedal;
a transmission;
a first sensor configured to detect an eye or a hand position of a driver of a vehicle, a door position of the vehicle or an engagement of a seatbelt; and
an electronic control unit coupled to the brake pedal sensor, the accelerator pedal sensor and the brake pedal sensor, the electronic control unit configured to:
determine that the brake pedal and the accelerator pedal are in a released position based on the detected position of the brake pedal and the detected position of the accelerator pedal, respectively,
determine that there is vehicle movement and that the transmission is in a drive position,
determine that the driver of the vehicle is unaware of the vehicle movement based on the eye or the hand position of the driver of the vehicle, the door position of the vehicle or the engagement of the seatbelt, and
apply a negative or deceleration torque to reduce or eliminate the vehicle movement when the driver is unaware of the vehicle movement.

9. The brake assist control system of claim 8 , further comprising:
a second sensor including at least one of an engine sensor configured to detect an applied torque or power to an engine of the vehicle, a vehicle speed sensor configured to detect a speed of the vehicle, or a wheel sensor configured to detect movement of a wheel of the vehicle;
wherein to determine that there is vehicle movement, the electronic control unit is configured to determine that the vehicle is creeping or moving forward based on the applied torque or power to the engine of the vehicle, the speed of the vehicle, or the movement of the wheel of the vehicle.

10. The brake assist control system of claim 8 , wherein the first sensor is a seatbelt sensor configured to detect the engagement of the seatbelt, wherein to determine that the driver of the vehicle is unaware of the vehicle movement the electronic control unit is configured to determine that the seatbelt is disengaged.

11. The brake assist control system of claim 8 , further comprising:
a navigation unit configured to detect a current location of the vehicle and one or more stop locations;
wherein the electronic control unit is further configured to:
determine that the current location of the vehicle is within a threshold distance of the one or more stop locations; and
determine that there is vehicle movement while the vehicle remains within the threshold distance of the one or more stop locations.

12. The brake assist control system of claim 8 , further comprising:
a second sensor configured to an incline or an angle of a roadway;
wherein the electronic control unit is configured to:
apply the negative or deceleration torque when the incline or the angle of the roadway is greater than a threshold angle, wherein an amount of the applied negative or deceleration torque is proportional to an amount of the incline or the angle of the roadway.

13. The brake assist control system of claim 8 , wherein the electronic control unit is configured to apply the negative or deceleration torque in response to determining that the transmission is in the drive position and determining that there is vehicle movement.

14. A method for controlling vehicle movement of a vehicle, comprising:
determining, by a processor and using a brake pedal sensor, that a brake pedal is in a released position;
determining, by the processor and using an accelerator pedal sensor, that an accelerator pedal is in a released position;
determining, by the processor, that the vehicle is in drive and that there is vehicle movement;
determining, by the processor and using a sensor, that a driver of the vehicle is unaware of the vehicle movement based on an eye or a hand position of the driver of the vehicle, a door position of the vehicle or an engagement of a seatbelt; and
reducing or eliminating, by the processor, creep torque of the vehi

Assignees

• Toyota Eng & Mfg North America

Inventors

• Chow Justin J
• Geller Benjamin M
• Galang Abril A

Classifications

• B60T2201/022

  Collision avoidance systems · CPC title

• B60T7/12

  for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)} · CPC title

• B60T13/662

  characterised by specified functions of the control system components · CPC title

• B60T7/18 Primary

  operated by wayside apparatus · CPC title

• B60T2201/06

  Hill holder; Start aid systems on inclined road · CPC title