Electric power steering apparatus and method for controlling the electric power steering apparatus
US7406375B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 10, 2007 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Sep 10, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/049
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
When it is determined that the torque output from the electric motor abnormally fluctuates or the torque output from the electric motor varies between clockwise and counterclockwise turning operations of the driver's steering wheel, the steering assist control is continued if the vehicle speed v is equal to or lower than the reference speed v0. In this case, the width of the dead band of the steering torque in the assist map used to calculate the target assist torque is increased. Thus, only in a case where the vehicle is moving at a low speed and the driver's steering wheel is operated with a great force, the steering assist torque is produced to alleviate the burden on the driver. In the other cases, the electric motor is stopped to minimize a sense of discomfort in the steering operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.