Electric power steering device and control method

Abstract

The invention discloses an electric power steering device and a control method. The device comprises a power-assisted controller ECU, a motor and a man-machine interaction module, wherein the man-machine interaction module is connected with the power-assisted controller ECU; the power-assisted controller ECU is connected with the motor; various force characteristic curves are arranged in the power-assisted controller ECU, and are comparison tables of pre-marked vehicle state data and output motor control signals; the power-assisted controller ECU acquires motor control signals through the force characteristic curves according to vehicle state data and sends the control signals into the motor, so that the motor is controlled to output steering power; and a driver selectively switches the force characteristic curves in the power-assisted controller ECU through the man-machine interaction module according to required power. The electric power steering device has the advantages that the driver can select different force characteristic curves according to stress, therefore, the power-assisted controller controls the motor to output different steering powers, different requirements of different users to the powers are met, and thus, the driving experiences are improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an electric power steering device and a control method. Background technique [0002] The active steering technology of automobiles currently mainly adopts the electric power steering system (EPS) that is assisted by a motor. Mainly through the force characteristic curve in the controller to provide different power assistance under different vehicle speeds and different road conditions. The realization of the force characteristic curve is to realize the magnitude of the motor output torque by controlling the motor current. When the force characteristic curve is constant, the hand force of the steering wheel is constant, and different drivers will have different driving experiences. In the prior art, there is only one force characteristic curve in the power assist system. When the speed of the vehicle is constant, when turning, the output power assist is constant. Due to the...

AI Technical Summary

Problems solved by technology

In the prior art, there is only one force characteristic curve in the power assist system. When the speed of the vehicle is constant, when turning, the output power assist is constant. Due to the difference in the perception of different drivers, it is difficult to provide a single power assist output for a comfortable driving experience.

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