Vehicular suspension system utilizing variable damping force shock absorber
US5467280A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2600/604
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicular suspension system comprises a variable damping force shock absorber utilizing a variable semiactive hydraulic damper having a plurality of different damping characteristics, a sensor for detecting an absolute vertical velocity of a sprung mass of the vehicle, and a control unit responsive to the vertical velocity for generating a control signal based on the vertical velocity to adjust the damping characteristic of the damper. The control unit includes a dead-band controlling circuit for adjusting the damping characteristic to a minimum damping characteristic only when the control signal value is maintained within a dead band for the vertical velocity. The dead-band controlling circuit varies upper and lower thresholds of the dead band depending on the magnitude of the vertical velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.