Variable valve event engine
US4253434A · kind A · utility
24Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1978 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Jun 20, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20882
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable valve event engine has a plurality of cams with different cam profiles and can vary the operating characteristics of the valve by moving a rocker arm for selectively changing the cams in accordance with changes in the operating conditions of the engine. The engine further includes a spring urging member which causes a certain amount of energy to be retained in a spring for rapidly changing the cams. In addition, the engine has a stopper guide positioned between two adjacent cams so that the changing of the cams can be effected while the crankshaft angle of the engine is within a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.