Electric power steering system
US10913489B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2017 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | Nov 16, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2205/05
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electric power assisted steering apparatus comprises an upper column shaft that is connected to a steering wheel of the vehicle; and a lower column shaft. A torsion bar interconnects the upper column shaft and the lower column shaft; and an electric motor is connected to the lower column shaft of the torque sensor assembly. A first sensor circuit generates a first torque signal based on angular deflection of the torsion bar, and a second sensor circuit generating a second torque signal based on angular deflection of the torsion bar, the apparatus further including: an error determining circuit which produces two error signals, each indicative of the validity of a respective torque signal, and a torque plausibility estimator which generates two plausibility signals each indicative of the plausibility of a respective one of the two torque signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.