Variable intake valve
US5331931A · kind A · utility
11Cited by
4References
7Claims
0Family size
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine (10) with intake valve (26) that may be kept open for a variable amount of time during the combustion cycle depending on operating conditions of the engine. Cam (22) rotates approximately 45.degree. clockwise to depress poppet (26) moving the intake valve to the open position. Cam (22) is held in the open position by lip (25) on seat (23) of the poppet valve. A step motor is used to rotate cam ( 22 ) to an open or closed position. The step motor may be deenergized while the poppet valve is in the open or shut position. In another embodiment the amount the valve is opened may be varied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.