Patent ID: 6686835
Filing Date: 2004-02-03
Classification: B62D

Abstract:
A rear wheel steering angle control apparatus comprising:a rear wheel steering angle determining unit which determines a steering angle ratio based upon vehicle speed; a rear wheel steering mechanism which outputs a control signal corresponding to the steering angle ratio and sets a rear wheel steering angle corresponding to the control signal; an observing unit which detects an abnormal condition of inputting and calculating processes of the rear wheel steering angle determining unit and an abnormal condition of an output signal supplied to the rear wheel steering mechanism; a neutral position detecting unit which detects whether or not output of the rear wheel steering mechanism is within a predetermined allowable range including a neutral position; and an alerting determining unit which provides an alert that the output of the rear wheel steering mechanism is not within the predetermined allowable range when the observing unit detects at least one of the abnormal conditions and which does not provide the alert when the output of the rear wheel steering mechanism is within the predetermined allowable range.