Roll rigidity controller of vehicle

Abstract

Roll rigidity of a vehicle is controlled optimally regardless of the situation of turning motion of the vehicle by estimating the transverse acceleration of the vehicle at the front wheel position and the rear wheel position, and controlling a roll rigidity varying means at the front wheel position and the rear wheel position by a controlled variable based on the transverse acceleration thus estimated. Target roll angle of the vehicle is operated based on the actual transverse acceleration of the vehicle at the center of gravity, and transverse acceleration of the vehicle at the front wheel position and the rear wheel position is operated by correcting the transverse acceleration of the vehicle at the center of gravity by a correction amount of transverse acceleration based on the yaw rate of the vehicle. Thereafter, target anti-roll moments at the front wheel position and the rear wheel position are operated based on the target roll angle and the acceleration of the vehicle at the front wheel position and the rear wheel position, and the active stabilizers of the front wheel and the rear wheel are controlled based on these target anti-roll moments.

Description

technical field [0001] The present invention relates to a roll stiffness control device for a vehicle, and more particularly to a roll stiffness control device for a vehicle having a roll stiffness variable unit at a front wheel position or a rear wheel position. Background technique [0002] A roll stiffness control device of a vehicle such as an automobile having variable roll stiffness units such as an active stabilizer at the front wheel position and the rear wheel position generally operates by calculating a target roll control for the entire vehicle based on the lateral acceleration of the vehicle. amount, and distribute the target roll control amount of the vehicle as a whole to the front and rear wheels based on the front-to-rear distribution ratio of the roll stiffness, thereby calculating the target roll control amount of the front wheel position and the rear wheel position, and based on the front wheel position and the rear wheel position The roll stiffness variab...

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional conventional roll stiffness control device as described above and the above-mentioned previously proposed roll stiffness control device, there are problems in that the difference in lateral acceleration between the front wheel position and the rear wheel position and the lateral acceleration Therefore, the roll stiffness at the front wheel position and the rear wheel position is controlled by changing the amount of difference of the difference according to the state of the vehicle's rotational motion. Therefore, it is not always possible to obtain the most suitable roll stiffness according to the state of the vehicle's rotational motion. control

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