Patent ID: 11858568
Assignee: HYUNDAI MOTOR COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An apparatus for controlling rear wheel steering, comprising:
a steering intention determinator operated by a controller including a processor and configured to acquire steering torque information from a steering torque sensor and to determine a turning intention of a driver using the steering torque information;
a turning state estimator operated by the controller and configured to acquire steering angle information from a steering angle sensor, to determine that a current state is a turning transient state when the steering torque is equal to or greater than a torque threshold value, and to estimate a turning state by calculating a required steering speed from the steering angle information;
a normal state lateral acceleration predictor operated by the controller and configured to, when the current state is the turning transient state, predict a normal state lateral acceleration to match the required steering speed in response to determining that the required steering speed is equal to or greater than a speed threshold value, wherein the normal state lateral acceleration predicted by reflecting steering angle information acquired from the steering angle sensor and wheel speed information acquired from a wheel speed sensor; and
a rear wheel steering angle calculator operated by the controller and configured to calculate a rear wheel steering angle based on the steering angle and the normal state lateral acceleration,
wherein the turning state estimator is configured to estimate the turning state in response to determining that the steering torque is equal to or greater than the torque threshold value, and
wherein the controller is further configured to control a rear wheel steering actuator based on the rear wheel steering angle and the normal state lateral acceleration.