Varying geometric compression ratio engine
US4449489A · kind A · utility
9Cited by
4References
66Claims
0Family size
Inventor
Key dates
| Filing date | May 21, 1981 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | May 21, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/042
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An automotive engine having an automatically adjusted geometric compression ratio, wherein the charge is compressed to maximum permissible values under all throttle settings. This is achieved by a cylindrical valve carrier, raised or lowered by a screw jack, while valve stem contact is maintained by a fast acting hydraulic valve actuator. The compact arrangement provides an engine profile which is not significantly taller than a standard overhead cam engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.