Control device for an active fluid suspension system of motor vehicles
US4934731A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jun 8, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2800/914
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An active fluid suspension system has a controller for controlling the delivery and withdrawal of air to and from individual suspension units at vehicle wheels in response to the sensor output signals representing a prescribed set of vehicle behaviors. The controller includes insensitivity zone filters each for filtering out those portions of one sensor output signal of which amplitudes are within an insensitivity zone, thereby avoiding unnecessary fluid flow into and out of the suspension units. The insensitivity zone is defined as a range of amplitudes between given positive and negative values. The filters widen the insensitivity zones with an increase in vehicle speed for optimum suspension control in all vehicle speed ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.