Patent ID: 9701334
Date: 2017-07-11
CPC Classifications: B62D

Claim:
1. A vehicle steering device comprising: a steering member operated by a driver to steer a vehicle; a reaction force motor that applies a reaction force to the steering member; a turning mechanism that turns turning wheels of the vehicle by a turning motor; a clutch that mechanically connects and disconnects the steering member with and from the turning mechanism; a control unit that provides control so that a turning angle is based on a steering angle of the steering member; and a control device that acquires a temperature by measuring or estimating the temperature, wherein, the control device determines, before activating the vehicle steering device, whether the temperature is a predetermined value or lower, and when the temperature is the predetermined value or lower, the steering member and the turning mechanism are mechanically coupled by the clutch and the vehicle steering device is activated with a manual steering mode or an electronic power steering mode, and when the temperature is higher than the predetermined value, the steering member and the turning mechanism are mechanically disconnected by the clutch and the vehicle steering device is activated with a steer by wire mode, wherein the temperature is a temperature around the turning mechanism, a temperature of a turning gear box of the turning mechanism, or an ambient temperature surrounding the vehicle.