Steering damper system
US6708795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2002 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Apr 17, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2600/184
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
To generate a damping force in a steering damper only upon an unintentionally caused handle action when it is truly necessary to restrain the turning of the handle, according to whether the cause of a handle action is intentional or unintentional. A rotation type steering damper is provided coaxially with a steering shaft, and the generation of a damping force or zero damping force is selected through a changeover by a variable valve provided in a bypass passage for communication between a right liquid chamber and a left liquid chamber of the steering damper. The changeover is controlled by a control device, which functions based on the direction of a moment exerted on the steering shaft detected by a moment sensor and the magnitude and direction of a rotational angular velocity concerning the turning of the steering shaft detected by a rotational angular velocity sensor, for controlling a damping force that is generated only when an unintentionally caused handle turning action opposite in direction to the moment is present and the rotational angular velocity has exceeded a predetermined threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.