Lost motion actuator with damping transition
US5485813A · kind A · utility
13Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1995 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Jan 11, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L1/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A lost motion hydraulic actuator for use between a cam and a valve of an internal combustion engine is provided with internal communication ports that are controlled by a piston to provide sequential closing of the ports during closing of the engine valve to reduce hydraulic shock and hammering noise as fluid is gradually directed exclusively through a damping orifice during valve seating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.