Variable valve event engine
US4354460A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1980 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Apr 22, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/033
- 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. The engine has a detector for sensing the temperature of the lubricant utilized in a hydraulic member for moving the rocker arm so that the movement of the rocker arm is effected only when the lubricant temperature is higher than a predetermined temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.