Steering system with active compensation for road disturbances
US10501112B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2016 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Aug 6, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0472
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle includes an adaptive front steering system including an assist motor that provides an overlay angle superimposed on a steering wheel angle. External torque to the assist motor is estimated by a controller and evaluated to determine whether it is the result of an external disturbance. If so, the controller evaluates whether the external disturbance is a road disturbance, such as by determining that road wheel speed varied from the vehicle speed or that an impact site is present in outputs of external sensors of the vehicle. If a road disturbance is determined to have occurred, compliance may be introduced in order to reduce the transmission of torque to the steering wheel. Compliance may be introduced by adjusting current to the assist motor, a target angle to the assist motor, reducing gain in the control system for the assist motor, or shorting leads of the assist motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.