Electronic power steering system with active aligning control function

Abstract

The invention relates to an electronic power steering system with active aligning control function; the system is formed by additionally arranging a torque sensor, a steering wheel rotating angle sensor, a vehicle speed sensor, an electronic control unit, a power-assisted steering motor and a speed reduction mechanism on the traditional mechanical steering system; in the electronic power steeringsystem with active aligning control function, the rotating angle signal of the steering wheel, the torque signal of the torque sensor and the vehicle speed signal of the vehicle speed sensor are combined and are input to an active aligning control module of an electronic control unit, so as to judge whether the steering motor to be in an aligning state, if the steering motor is in the aligning state, the proper aligning control force moment can be calculated, and the corresponding force moment can be output by the motor. In the invention, the rotating angle signal, the torque signal and the vehicle speed signal are utilized to carry out aligning control, the invention is suitable for the electronic power steering system with various power-assisted modes, improves the aligning performance of the vehicle and does not affect the control handfeel of drivers.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to an electric power steering system, in particular to an electric power steering system (Electric Power Steering System, EPS for short) with an active centering control function. Background technique [0002] Electric power steering system includes mechanical steering system, torque sensor, steering wheel angle sensor, vehicle speed sensor, electronic control unit, power steering motor and its reduction mechanism. Wherein, the torque sensor is installed on the steering shaft of the mechanical steering system to detect the driver's operating torque and output a torque signal; the vehicle speed sensor is used to detect the current vehicle speed and output a vehicle speed signal; the steering wheel angle sensor is used to detect the steering torque. The angle signal that the disc deviates from the straight-line driving position and outputs; the electronic control unit calculates the...

AI Technical Summary

Problems solved by technology

[0003] The traditional electric power steering control system can improve the steering portability of the vehicle. However, when driving at low speeds, due to the influence of the friction torque of the steering device, the steering wheel cannot return to the middle position, which reduces the driving safety of the vehicle.

Images