Patent ID: 9302704
Filing Date: 2016-04-05
CPC Classification: B60W,B62D

Claim Text:
1. A power steering controller for a vehicle comprising: a basic assist torque setting unit to set an assist torque of a steering torque as a basic assist torque in accordance with a driving state of the vehicle; a driving road shape recognizing unit to recognize a shape of a driving road in front of the vehicle; an assist torque correction unit, when the vehicle is in a straight travel state before a driver turns a steering wheel, to calculate a correction amount of the basic assist torque on the basis of a curve radius of the driving road in front of the vehicle and a steering speed, and to offset a steering torque characteristic value, which is predetermined depending on a steering angle, in a direction opposite to a steering direction by decreasing an absolute value of the basic assist torque for the steering direction based on the correction amount, the steering torque characteristic value being offset in a dead zone existing between an actual wheels angle and a steering wheel angle of the steering wheel when the steering wheel is around a central position; and a steering control unit to drive and control an actuator that assists a steering torque with the corrected basic assist torque.