Elektrisches Servolenksystem

Details

Veröffentlichungs-Nr.

EP3053807

Aktenzeichen

EP16153236

Anmeldetag

28. Januar 2016

Veröffentlichung

7. März 2018

Erteilung

7. März 2018

Rechtsraum

EP

IPC

B62D5/04

Abstract

Provided is an electric power steering system that achieves a more appropriate steering feel. An ECU of the electric power steering system calculates a basic assist component (T<a1>*) and a target pinion angle (θ<p>*) based on at least steering torque (T<h>). The ECU calculates a correction component for the basic assist component (T<a1>*) through feedback control in which an actual pinion angle is caused to match the target pinion angle (θ<p>*). The ECU calculates an assist command value by adding the correction component to the basic assist component (T<a1>*). The ECU corrects a hysteresis controlled variable (T<hy>*) and a viscosity component (T<vi>*) according to the rate of change (gradient) in a spring component (T<sp>*) with respect to a change in absolute value of the target pinion angle (θ<p>*). Specifically, the ECU multiplies the hysteresis controlled variable (T<hy>*) and the viscosity component (T<vi>*) by gains (G<hy>, G<vi>) that have a larger value as the rate of change in spring component (T<sp>*) increases.

Anmelder

Firma

JTEKT Corporation

Land

🇯🇵 Japan

Fachgebiete