Vehicle steering device, has angle detection device for detecting relative rotation angle between steering shaft and rotation member, and electric power steering system supporting steering of steered wheel by output power of electric motor

摘要

The device (1) has a variable gear ratio system (4) varying a control angle ratio, and a rotation angle detection device for detecting a relative rotation angle between a steering shaft (12) and a rotation member (13). Rotation member sided magnetic field detection devices are provided for detecting a variation of magnetic flow density of a magnetic field. An electric power steering system (6) has an electric motor (5), and supports steering of a steered wheel by output power of the motor, where the motor and an electric motor (3) of the ratio system are enfolded in a module. An independent claim is also included for a method for controlling steering of a vehicle.