Rear wheel toe angle control device and method for calibrating a reference position of an electric actuator in a rear wheel toe angle control device

Abstract

[TASK] The wheel alignment of rear wheels can be properly set without using an alignment tester if the rear wheels are equipped with a rear wheel toe angle control device. [SOLUTION] In a calibration drive control, an ECU () actuates electric actuators () until the front wheel steering angle (δf) becomes zero or the rear wheel toe angles (δr) are symmetric to each other (steps Sand D) to thereby achieve a symmetric toe angle position (Ssym) (step S). Then, the ECU () actuates the electric actuators () from the symmetric toe angle position (Ssym) by a same amount so as to cause the rear wheel toe angles to be a neutral value, and a reference position (S) to be substantially equal to a standard operational position (Sstd) or an axial force (AF) to be substantially equal to a standard axial force (AFstd) (step S). At this time, the operational position detected value (Sdtc) may be reset as the reference position (S) (step S).