Hydraulic cylinder assembly for automotive suspension system and actively controlled suspension system utilizing same
US4900056A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | May 26, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2600/26
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic cylinder assembly to be used in an actively controlled suspension system includes a built-in pressure accumulator. The pressure accumulator employed in the hydraulic cylinder assembly has a reciprocally movable free piston for dividing a fluid chamber and a pneumatic chamber. The free piston thrustingly moves for establishing pressure balance between the fluid chamber and the pneumatic chamber and, in turn, for establishing pressure balance between the fluid chamber and an associated pressure chamber in the hydraulic cylinder so as to accumulate pressure while the fluid in the associated pressure chamber is compressed and to supply the pressure when the associated pressure chamber expands while absorbing vibration energy exerted between a vehicle body and a suspension member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.