US 2012/0239252 A1Published application

Vehicle power steering control apparatus

AssigneeFuji Jukogyo Kabushiki Kaisha

InventorsShinji Sawada, Hiroki Kato

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Abstract

There is provided a vehicle power steering control apparatus. A steering control unit sets a base assist torque Tb based upon a vehicle speed and a steering torque. When an obstacle ahead is detected by an image recognition device, the steering control unit calculates an overlapping ratio between the obstacle and the vehicle in the widthwise direction. When an absolute value of the overlapping ratio is larger than a predetermined threshold value, the steering control unit increases the base assist torque for correction, and when the absolute value is equal to or smaller than the predetermined threshold value, it decreases the base assist torque for correction. The steering control unit outputs the calculated value to a motor drive unit as a control quantity (assist torque).

Claims4

Dependent claims

A vehicle power steering control apparatus comprising:

a base assist torque setting unit for setting a base assist torque, which serves as a base value of an assist torque for a steering torque, according to a driving condition of a vehicle;
an obstacle-ahead information detecting unit for detecting obstacle-ahead information of the vehicle;
an assist torque correcting unit for determining an avoidance condition by a steering to the obstacle ahead when the obstacle-ahead information detecting unit detects an obstacle ahead, and increasing the base assist torque for correction until the vehicle reaches a preliminarily set steering condition where it can be determined that the obstacle ahead has been avoided by the steering, while decreasing the base assist torque in the preliminarily set steering condition where it can be determined that the obstacle ahead has been avoided by the steering;
and
a steering control unit for controlling an actuator for assisting the steering torque based upon the set base assist torque.

2 more elements

Dependencies are inferred from the claim text.