Steer by wire steering system
US10351165B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2017 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Mar 8, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0478
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A steer by wire steering system for a vehicle includes a reaction force actuator 25, a steering actuator 28, a control unit 40, and a clutch 20, 120 that can selectively connect a steering wheel 11 with road wheels 3 to be steered. The control unit is configured to operate in an emergency mode when a failure is detected while the control unit is operating in a steer by wire mode. The emergency mode includes commanding the clutch to engage, terminating the steer by wire mode, performing a position keep control whereby the steering actuator is driven so as to maintain a fixed steering angle of the road wheels, initiating a power assist mode using the reaction force actuator, and once the clutch is fully engaged, terminating the position keep control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.