Vehicle for variable gear ratio steering system and steering angle ratio control method for a vehicle variable gear ratio steering system

摘要

PPROBLEM TO BE SOLVED: To provide a vehicular variable steering angle ratio steering device capable of determining any abnormality of a battery by grasping the terminal voltage of the battery or the like, considerably reducing the consumption current of the battery when determining the abnormality, and preventing the battery from running out. PSOLUTION: The vehicular variable steering angle ratio steering device 41 comprises a vehicular power supply diagnosis device 1 having a terminal voltage detection means for detecting the terminal voltage of a battery mounted on a vehicle, a current detection means for detecting the discharge current of the battery, and an abnormality determination means for determining the abnormality based on the detected terminal voltage value and the detected discharge current value, and a steering angle ratio control means 54 for changing the steering angle ratio to be smaller than a normal value when the abnormality determination means of the vehicular power supply diagnosis device 1 determines the abnormality. The vehicular power supply diagnosis device is combined with the vehicular variable steering angle ratio steering device, and the consumption current of the battery is considerably reduced by the steering angle ratio control means for changing the steering angle ratio when the battery is in an abnormal condition. PCOPYRIGHT: (C)2008,JPO&INPIT