Patent ID: 8938335
Filing Date: 2015-01-20
Classification: B62D

Abstract:
1. A control unit for a vehicle steering system, comprising: a steered mechanism that steers a wheel of a vehicle upon receiving rotation of a steering shaft, the steering shaft being used to change a steered angle, which is a turning angle of a steered wheel of the vehicle; and an electric motor that is used to change a steering angle, which is a rotation angle of the steering shaft, the control unit controlling the electric motor to change the steering angle based on a target route for the vehicle, wherein a steered element angle, which is a rotation angle of a steered rotation member that rotates in accordance with an operation for changing the steered angle in the steered mechanism, is used in control over the electric motor, the control unit further comprises element angle computing means in which a correlation between the steering angle and the steered element angle is predefined, and the element angle computing means has a dead zone in which the steered element angle remains unchanged despite a change in the steering angle.