Electronic controlled fluid suspension system for controlling roll and pitch of a vehicle body
US4897776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Sep 2, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2500/2014
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In controlling roll and pitch of a vehicle body responsive to a displacement signal produced at each wheel of the vehicle, each signal is low-pass-filtered with a certain threshold frequency to prevent hunting of the control due to an excessively high frequency component (such as noise or a component corresponding to road irregularities) of the signal. According to this invention, the threshold frequency is changed to a higher value in order to get quick attitude control when the roll or pitch of the body is expected, while it is set at a lower value when no such attitude change is expected in order to prevent hunting of the control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.