| 摘要 |
<p>When a vehicle is quickly steered while the vehicle is travelling at an extremely low speed, a load on an in-vehicle power supply is reduced without deteriorating a steering feeling by reducing a motor driving current. A steering speed (¸'h) is compared with a threshold (s) (step S4). When the steering speed (¸h') is lower than the threshold (s), the process proceeds to step S6. In step S6, a voltage value (V0) of a battery power supply, which is used as a prescribed value, is set as a limit voltage (Vmax) in order to reduce a motor consumption current. When the steering speed (¸h') is higher than the threshold (s), a value "V0/n" lower than the prescribed value (V0) is set as the limit voltage (Vmax) to reduce a consumption current when the steering wheel is steered without driving. "n" is "delay adjustment parameter", and is a real number that exceeds 1.</p> |
