Electric power steering system
US6382345B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2001 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Feb 8, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0463
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electric power steering system, which controls an electric motor on the basis of a target electric current determined in accordance with a steering torque and applies a driving force from the electric motor to a steering mechanism. The system includes: a steering torque sensor; a target current setting circuit for determining the target electric current in accordance with the steering torque on the basis of an assist characteristic indicative of a relationship between the steering torque and the target electric current; a motor controlling circuit for controlling the electric motor on the basis of the target electric current; a traveling state judging circuit for judging whether or not a motor vehicle is in a slalom traveling state; and an assist characteristic modifying circuit for offsetting the assist characteristic from an initial characteristic level when the motor vehicle is in the slalom traveling state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.