Air bladder controlled hydraulic engine mount
US4901986A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Jan 19, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F13/26
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic mount assembly is disclosed having a partition forming two hydraulic chambers and including a damping decoupler. A primary chamber is formed by an elastomeric member and a secondary chamber by a resilient diaphragm. During dynamic loading of the mount, fluid passes through an orifice between the two chambers of the mount causing expansion and contraction of the diaphragm. An expandable, pneumatic bladder is mounted within the primary chamber. A tube provides fluid communication between the bladder and the atmosphere. When a valve in this tube is open, air freely enters and escapes the bladder in symphony with the vibrating mount. Alternatively, the valve may be closed and a positive pressure provided to the bladder from a variable pressure fluid supply. By actively controlling bladder expansion and contraction in this manner, the dynamic rate of the mount assembly may be selectively reduced at relatively high vibration frequencies; that is, those over 20 Hz. Damping may also be reduced to provide a relatively soft mount for engine isolation. Further, by evacuating the bladder, a relatively hard mount may be provided exhibiting relatively high damping and high rate for b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.