Electric Power Steering System

Electric Power Steering System

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 and a target pinion angle based on at least steering torque. The ECU calculates a correction component for the basic assist c...

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Hauptverfasser: EKI Hirozumi, TAMAIZUMI Terutaka, KITA Masayuki
Format: Patent
Sprache:eng
Schlagworte:
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
MOTOR VEHICLES
PERFORMING OPERATIONS
TRAILERS
TRANSPORTING
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creator EKI Hirozumi
TAMAIZUMI Terutaka
KITA Masayuki
description 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 and a target pinion angle based on at least steering torque. The ECU calculates a correction component for the basic assist component through feedback control in which an actual pinion angle is caused to match the target pinion angle. The ECU calculates an assist command value by adding the correction component to the basic assist component. The ECU corrects a hysteresis controlled variable and a viscosity component according to the rate of change (gradient) in a spring component with respect to a change in absolute value of the target pinion angle. Specifically, the ECU multiplies the hysteresis controlled variable and the viscosity component by gains that have a larger value as the rate of change in spring component increases.
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subjects LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
MOTOR VEHICLES
PERFORMING OPERATIONS
TRAILERS
TRANSPORTING
title Electric Power Steering System
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