Longitudinal overlay while using brake-to-steer

Patent metadata

Field	Value
Publication number	US-2023124821-A1
Application number	US-202117504357-A
Country	US
Kind code	A1
Filing date	Oct 18, 2021
Priority date	Oct 18, 2021
Publication date	Apr 20, 2023
Grant date	—

Abstract

A number of illustrative variations may include a system that may manage torque overlay scenarios in a vehicle where the brakes and propulsion system are providing both lateral and longitudinal movement commands and there is a change in longitudinal acceleration requested from a driver or autonomous driving system. The system may manage driver brake inputs and brake-to-steer brake inputs to maintain brake-to-steer functionality while also applying sufficient braking as requested by the driver.

First claim

What is claimed is:

1 . A method for use in a vehicle having a plurality of vehicle systems comprising a braking system configured to manipulate a brake set, a steering system configured to adjust a roadwheel direction, a brake-to-steer system, and a controller in operable communication with the braking system, steering system, and brake-to-steer system, the method comprising:
receiving driver steering input via the steering system; converting steering requests to brake torque requests via the brake-to-steer system; applying a first brake torque to at least one individual brake caliper within the vehicle according to the brake torque requests to effectuate brake-to-steer functionality; receiving driver brake input via the braking system; applying a second brake torque to at least one individual brake caliper within the vehicle according to the driver brake inputs; and maintaining first brake torque and second brake torque to apply additive brake torque to effectuate driver brake input and brake-to-steer functionality.

2 . A method as in claim 1 , wherein applying the first brake torque prior to applying the second brake torque.

3 . A method as in claim 1 , wherein applying the second brake torque prior to applying the first brake torque.

4 . A method as in claim 1 , wherein maintaining first brake torque and second brake torque to apply additive brake torque to effectuate driver brake input and brake-to-steer functionality comprises combining the first brake torque and the second brake torque.

5 . A method for use in a vehicle having a plurality of vehicle systems comprising a braking system configured to manipulate a brake set, a steering system configured to adjust a roadwheel direction, a brake-to-steer system, and a controller in operable communication with the braking system, steering system, and brake-to-steer system, the method comprising:
receiving driver steering input via the steering system; converting steering requests to brake torque requests via the brake-to-steer system; applying a first brake torque to at least one first individual brake caliper within the vehicle according to the brake torque requests to effectuate brake-to-steer functionality; receiving driver brake input via the braking system; applying a second brake torque to at least one second individual brake caliper within the vehicle according to the driver brake inputs; and maintaining first brake torque and second brake torque to apply deceleration brake torque to effectuate driver brake input and brake-to-steer functionality.

6 . A method as in claim 5 , wherein the at least one first individual brake caliper is on a front wheel of the vehicle.

7 . A method as in claim 5 , wherein at least one second individual brake caliper is on a rear wheel of the vehicle.

8 . A method as in claim 5 , wherein at least one second individual brake caliper is a plurality of second individual brake calipers in operable communication with a rear axle of the vehicle.

9 . A method as in claim 5 , wherein maintaining first brake torque and second brake torque to apply deceleration brake torque to effectuate driver brake input and brake-to-steer functionality comprises:
applying a third brake torque to at least one front wheel utilizing brake-to-steer functionality; and applying a fourth brake torque request to at least one rear wheel.

10 . A method as in claim 9 , wherein applying a fourth brake torque request to at least one rear wheel comprises applying a fourth brake torque to road wheels on a rear axle of a vehicle.

11 . A product comprising:
at least one computing device in operable connection with a network; a memory that stores computer-executable components; a processor that executes the computer-executable components stored in the memory, wherein the computer-executable components comprise: applying at least one first brake torque to at least one individual brake caliper within a vehicle according to at least one brake torque request from a brake-to-steer system;
receiving driver brake input;
applying a second brake torque to at least one individual brake caliper within the vehicle according to the driver brake input; and maintaining the first brake torque and the second brake torque to apply additive brake torque to effectuate driver brake input and brake-to-steer functionality.

12 . A product as in claim 11 , wherein applying a second brake torque to at least one individual brake caliper within the vehicle according to the driver brake inputs comprises combining the first brake torque and the second brake torque.

13 . A product as in claim 11 , wherein additive brake torque comprises a plurality of unique brake torques applied to a respective plurality of roadwheels.

Assignees

• Steering Solutions Ip Holding
• Continental automotive systems inc

Inventors

• Labarbera Joseph A
• Schumann Clinton L
• Sanford Scott T
• Wyciechowski Michael
• Garcia Emmanuel

Classifications

• B62D9/005 Primary

  Emergency systems using brakes for steering · CPC title

• B60T2260/02

  Active Steering, Steer-by-Wire · CPC title

• B60T8/1755

  Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve (road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02) · CPC title

• B62D11/08 Primary

  using brakes or clutches as main steering-effecting means · CPC title

• B62D11/003

  Electric or electronic control systems · CPC title