Vehicle steering control apparatus having no mechanical connection means between the steering wheel and steering wheel

摘要

The present invention is a variable ratio type steering control system (2) having a control member that can be maneuvered (θ _max) within the maximum range between the right stop and left stop with being used by the driver to steer the vehicle on the steering control system there, issuing a (θ) request steering signal was quantified with respect to the direction and amplitude. Has one actuator (3) at least acts on the steering angle of the steering wheel of one, the steering control system, the steering control system of the present invention, as a criterion to control for steering actuators for each of the actuators at least In order to determine the control angle (α), and a controller (4) using (θ) required steering signal (V) and at least a vehicle speed as an input variable. In accordance with the present invention, the controller, at least the equilibrium state of the vehicle speed (V) and according to parameters specific first unit for determining the maximum steering angle for a single steered wheel of an equivalent bicycle mode of the vehicle (β _max) ( 41), and the second unit to seek shift down ratio (RD) and (θ _max) maximum steering angle according to (β _max) maximum range of the control member, request the steering signal (RD) and shift down ratio in accordance with (θ) a third unit for determining a steering angle of a plurality, that is, a final unit (43) or one.