Actively controller suspension system for automotive vehicle for controlling suspension characteristics with vehicular speed dependent variable damping characteristics
US4934732A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Oct 7, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G17/018
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A suspension control system introduces capability of automatically adjusting sensibility of attitude change depending upon a vehicular speed with maintaining capability of manual adjustment of the sensibility for the vehicular attitude change. The actively controlled suspension system employs a pressure control valve which is operable in response to a control signal and controls fluid pressure in the fluid chamber of a hydraulic cylinder as a replacement of the conventional hydraulic shock absorber. The pressure control valve is associated with a controller which detects bounding and rebounding acceleration and stroke speed in bounding and rebounding motion for detecting vehicular attitude change and deriving a control signal to operate the pressure control valve to suppress attitude change. The controller is response to a vehicle speed indicative parameter for adjusting sensitivity of attitude change and whereby adjusting suspension control characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.