Active steering device of vehicle

Abstract

The present invention provides an active steering device of a vehicle, comprising a basic small pinion angle generation part configured to generate a basic pinion gear angle with respect to the steering angle of a driver according to the gear ratio of the active steering device with respect to the vehicle speed; a correction pinion angle detection part configured to detect a preset correction pinion angle according to the steering angle; and a basic pinion angle regulation part configured to receive the basic pinion angle and the correction pinion angle from the pinion angle generation part and the correction pinion angle detection part, and the correction pinion angle is used for regulating the basic pinion angle and output the final pinion angle. The active steering device of a vehicle is able to improve the response speed of the vehicle and ensure the high speed stability when steering in emergency in the high speed emergency condition, besides, whatever how about the steering angle area, the increased steering with a preset amount is generated, so that the steering linearity of a vehicle is ensured.

Description

technical field [0001] The present invention relates to an active steering device for a vehicle, and more particularly to an active steering device for a vehicle that uses an AFS gear ratio mapping table (mappingtable) to generate a basic pinion angle and adjusts the basic pinion angle according to the driver's steering angular velocity to generate a final pinion angle. Steering device. Background technique [0002] The function of Active Front Steering (hereinafter referred to as 'AFS') is to change the ratio of the driver's input steering angle (=steering ratio) to the target steering angle according to changes in vehicle speed, and increase the ratio of the input steering angle to the input steering angle when the vehicle is running at a low speed. The target steering angle is large to ensure the convenience of operation, and when the vehicle is running at high speed, the target steering angle is reduced relative to the input steering angle to finally ensure high-speed st...

AI Technical Summary

Problems solved by technology

[0004] However, when driving at high speed due to an obstacle in front of you and making a sharp turn, the AFS cannot achieve sufficient steering to avoid the obstacle due to the small gear ratio of the AFS.

[0005] For this reason, in the past, the AFS gear ratio was changed by reflecting the steering angular velocity, but since the AFS target value hardly changes in the region with a relatively small steering angle, and the AFS target value in the region with a large steering angle is too large, there is a risk of vehicle driving instability. question

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