steering control device

Abstract

The present invention provides a steering device capable of suppressing a driver's steering beyond an imaginary steering limit position. The basic current command value calculation circuit calculates a basic current command value based on the steering torque and the vehicle speed. A constant target steering angle value representing an imaginary steering limit position is stored in the memory. When a value near and smaller than the target steering angle value is set as the steering angle threshold value, the first correction value calculation circuit calculates the steering reaction force to increase sharply when the steering angle is equal to or greater than the steering angle threshold value. first correction value. The second correction value calculation circuit calculates a second correction value so that the steering angle matches the target steering angle value when the steering angle is equal to or greater than the steering angle threshold value. The basic current command value is corrected using the first correction value and the second correction value. This prevents the driver from steering the steering wheel beyond the target steering angle value.

Description

technical field [0001] The present invention relates to steering devices. [0002] The disclosure of the Japanese patent application No.2016-181541 submitted on September 16, 2016 and the Japanese patent application No.2016-241541 submitted on December 13, 2016, including its specification, drawings and abstract, the present invention, Incorporated herein by reference in its entirety. Background technique [0003] Conventionally, as described in Japanese Patent Application Laid-Open No. 2015-20506, a steering device in which a virtual rack end is set has been introduced. The steering device described above includes a motor that applies torque to a steering mechanism of a vehicle, and a control device that controls driving of the motor. The control device calculates a basic current command value based on the steering torque detected by the torque sensor and the vehicle speed detected by the vehicle speed sensor. In addition, the control device calculates a correction value...

AI Technical Summary

Problems solved by technology

[0005] However, in the steering device with the above configuration, since the basic current command value is corrected using a correction value determined according to the steering angle, for example, if the steering torque given to the steering wheel by the driver is too large, the steering wheel may be operated. Imaginary steering limit position beyond the target

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