Exhaust valve mechanism in an internal combustion engine
US5890469A · kind A · utility
30Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L13/065
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Exhaust valve mechanism in an internal combustion engine, comprising a valve play take-up mechanism in the form of a piston (8) disposed in a cylinder chamber (7) at one end of a rocker arm (1) and a hydraulic circuit with valve means (20) for supplying and draining oil to and from the cylinder chamber. Controlled check valve means (22) prevent, at a certain pressure in the hydraulic circuit, drainage of oil from the cylinder chamber. A bypass valve (40) controlled by the rocking movement of the rocker arm opens for draining the cylinder chamber before the exhaust valve reaches the top of its lift curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.