| 摘要 |
PROBLEM TO BE SOLVED: To reduce unnatural changes of steering reaction force which is felt by a driver, by controlling steering assist force to suppress changes of the steering reaction force due to roll steering when adhesion abnormality of a roll stiffness control device occurs, to improve steering feeling more than ever, and to reduce steering holding torque. SOLUTION: In case where adhesion abnormality occurs on an active stabilizer device on a front wheel side or on a rear wheel side, unnecessary steering torqueΔTs due to roll steering is computed when a vehicle is in a specified traveling state. The correction amount Tsa of the steering torque for reducing influences of the unnecessary steering torqueΔTs is computed on the basis of unnecessary steering torqueΔTs and vehicle speed V, and the steering torque Ts is subtracted and corrected by the correction amount Tsa of the steering torque. Target assist torque Ta is computed on the basis of the steering torque Ts after subtraction and correction and the vehicle speed V, and electric power steering device 26 is controlled to make the steering assist torque become the target assist torque Ta. COPYRIGHT: (C)2008,JPO&INPIT |
