Brake-to-steer lateral stability management based on stability indicator correlation
AssigneesSteering Solutions IP Holding Corporation, Continental Automotive Systems, Inc.
InventorsAlexander Jennings, Sarin Kodappully, Omkar Karve, Michael S. Wyciechowski
Life of this patent
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Abstract
A number of variations are disclosed including a system and method for modifying, in real-time, at least one brake or powertrain application to individual roadwheels of a vehicle to increase lateral maneuver capability in a vehicle having an operational, partially operational, failing, or failed electronic steering system. The system and method may include modifying at least one brake or powertrain command to individual roadwheels where vehicle instability is detected.
Claims18
A method comprising:
- receiving or calculating at least one stability indicator wherein the received at least one stability indicator comprises at least one of vehicle speed, lateral acceleration, vehicle yaw rate, steering wheel angle, steering wheel torque, speed, wheel speed or yaw rate, and wherein the calculating at least one stability indicator comprises calculating a yaw rate;
- calculating an estimated yaw rate based on at least one of vehicle speed, wheel speed or lateral acceleration;
- calculating a yaw rate error based on at least one of the estimated yaw rate or a measured vehicle yaw rate;
- determining a brake command modifier value based on at least one of measured vehicle speed or the yaw rate error;
- modifying at least one brake command based on the brake command modifier value to provide a modified brake command;
- communicating the modified brake command to a brake-to-steer system to provide brake-to-steer stability.
A method comprising:
- determining if a brake-to-steer system is steering a vehicle, and if so comparing a stability indicator to a stability indicator threshold, and if the stability indicator is beyond the limit of the stability indicator threshold range then calculating a modulation of at least one of a brake or powertrain commands to provide at least one of a modified brake-to-steer brake command or brake-to-steer powertrain command, and outputting at least one of the modified brake-to-steer brake command or brake-to-steer powertrain command to provide brake-to-steer stability.
Dependencies are inferred from the claim text.