Steering system
US8086374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2008 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Aug 20, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D6/002
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
There is provided a steering system allowing a comfortable steering operation even if a driver quickly turns a steering wheel when a transfer ratio is quickened in a low vehicle speed range. In the steering system that changes the transfer ratio of a steering angle of the steering wheel to a turning angle of a turning wheel by a variable transfer ratio mechanism and generates auxiliary power by an electric power steering unit, a variable transfer ratio mechanism controlling ECU has a switching section for switching a transfer ratio modulating mode of setting a rotational angle of a transfer ratio variable motor used in the variable transfer ratio mechanism so that the transfer ratio is set at a target transfer ratio corresponding to vehicle speed with a steering torque modulating mode of reducing an electric current for driving the motor so as to reduce steering power of the steering wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.