VEHICLE TRAVEL STATE ESTIMATING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a vehicle travel state estimating device capable of accurately estimating vehicle behavior when the vehicle behavior suddenly changes. SOLUTION: This vehicle travel state estimating device is provided with a vehicle behavior means for arithmetically operating a tire slip angle based on a vehicle model, a cornering stiffness arithmetic operation means for arithmetically operating cornering stiffness from a lateral force corresponding physical quantity and the tire slip angle of a wheel, and a divergence preventive means for preventing divergence of an arithmetic operation value of the cornering stiffness. A vehicle behavior arithmetic operation means corrects the vehicle model by the cornering stiffness. COPYRIGHT: (C)2009,JPO&INPIT