Active damping system for an automobile suspension
US4969662A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Jun 8, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2600/602
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The active damping system includes an electrical current conductive coil spatially fixed with respect to one of the sprung mass and unsprung mass of a vehicle and a magnetic element spatially fixed with respect to the other of the sprung mass and the unsprung mass. Relative motion is imparted between the coil and the magnetic element in response to relative motion between the sprung mass and the unsprung mass. This relative motion is in response to random input vibrations from a road surface. The magnetic element develops a magnetic flux intersecting the coil to develop and induced current through the coil wherein the induced current develops an electromotive force on the magnetic element opposing the relative motion to act as the active damping element. The active damping system also includes means for developing a control current through the coil to oppose motion of the sprung mass relative to the road surface occurring below a selected frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.