Roll stability indicator for vehicle rollover control

Abstract

A system and method for providing a vehicle roll stability indicator that estimates the propensity for vehicle rollover. The system determines vehicle kinematics from vehicle sensors, such as roll rate, yaw rate, lateral acceleration, vehicle speed, etc. From these kinematic values, the system estimates a roll angle of the vehicle and a bank angle of the vehicle. From the estimated bank angle, the system provides a corrected roll angle. From the corrected roll angle, the system determines a roll energy of the vehicle and a roll energy rate of the vehicle. From the roll energy and the roll energy rate, the system calculates a roll stability indicator that defines the potential that the vehicle will tip-up or roll over. From the roll stability indicator, vehicle stability control systems can take suitable action.

Description

technical field

[0001] The present invention relates generally to a system and method for providing a vehicle roll stability indicator indicative of the potential for a vehicle to roll, and more particularly to a system and method for providing a vehicle roll stability indicator A method wherein determining the roll stability index includes calculating a vehicle roll energy and a roll energy rate, wherein the index is indicative of a potential for vehicle roll. Background technique

[0002] It is known in the art to prevent vehicle rollover by providing vehicle rollover control using differential braking control, rear wheel steering control, front wheel steering control or any combination thereof. The vehicle roll prevention system can receive vehicle dynamic information through various sensors (such as yaw rate sensors, lateral acceleration sensors, and roll rate sensors), so as to determine appropriate control actions to take to prevent vehicle rollover. A balance is typi...

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