Patent ID: 8234044
Filing Date: 2012-07-31
Classification: B62D

Abstract:
1. A vehicle steering control apparatus, comprising: a steering upper shaft for inputting a steering operating angle; a steering lower shaft for steering front wheels of the vehicle; a steering angle sensor for detecting a steering angle of said steering upper shaft; a yaw rate sensor for detecting a yaw rate of the vehicle; a vehicle speed sensor for detecting a vehicle speed, a steering angle correction calculating means for calculating a correction amount of a steering angle of said steering lower shaft, said correction calculating means including a first correction amount calculating section which determines a first correction component of said steering angle based on input as to the steering angle and vehicle speed, and a second correction amount calculating section which determines a second correction component based on input as to the vehicle speed and a yaw rate detected by said yaw rate sensor; a steering angle correcting mechanism provided between said steering upper shaft and said steering lower shaft for correcting said steering angle of said steering lower shaft through adding said correction amount calculated by said steering angle correction calculating means to said steering angle of said steering upper shaft detected by said steering angle sensor; wherein a total correction amount of said steering angle of said steering lower shaft is obtained through combining said first and second correction components, wherein said yaw rate based correction component is obtained by multiplying a control gain calculated based on a change of a yaw rate corresponding to said vehicle speed to said yaw rate, and wherein said first correction component features a transition location between a quick steering response characteristic and a slower steering response characteristic that is based on the vehicle speed, and wherein said yaw rate based correction component is inclusive of a linear relationship between velocity and gain for a velocity range that is inclusive of a velocity range that comprises said transition location of said first correction component.