Fault-tolerant electromechanical steer-by-wire steering actuator
US6208923A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1999 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Jul 9, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/001
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electromechanical steering actuator for a steer-by-wire application in motor vehicles. An electronic closed-loop/open-loop control system generates steering signals for a pair of electric servomotors, which act via a gear unit on a steering control element of a rack-and-pinion steering system. The closed-loop/open-loop control system includes a pair of process computers which deliver corrective signals to the servomotors via drive units. The steering actuator is divided into two diversely redundant systems including two redundant process computers, each of which delivers corrective signals via two redundant drive units to two servomotors which act on a common steering shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.