Electrical power assisted steering system
US11292512B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | May 3, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/049
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of operating an electric power assisted steering system of the kind in which an electric motor applies an assistance torque to a part of the steering system as a function of an assistance torque signal, the assistance torque reducing the force required by the driver to turn a steering wheel, comprises during normal operation generating an assistance torque signal that is dependent on the torque applied by the driver, and during a fault operation in which the torque applied by the driver is not reliably known to the system generating an assistance torque signal that is derived from a first term that has a value that varies as a function of the angular position of the steering relative to a changeable datum, the angular position of the changeable datum being updated in the event that the direction of rotation of the steering changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.