Vehicular electric power steering device and methods for controlling same
US6397969B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Oct 5, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/049
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electric power steering device controls an electric motor through a program processing based on a steering torque detected by a torque sensor and a vehicle speed detected by a vehicle speed sensor, and applies a suitable assisting force to rotational motion of a steering handle. Occurrence of an abnormality in the torque sensor and a power circuit is detected through the program processing. The torque sensor is activated upon receipt of a power-supply voltage from the power circuit and detects a steering torque. If a power-supply voltage outputted from the power circuit has dropped, detection of an abnormality in the torque sensor is forbidden. If a power-supply voltage supplied from a battery to the power circuit has dropped, detection of an abnormality in the power circuit is forbidden.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.