Electric valve drive device in an internal combustion engine
US5983847A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2009/2115
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A poppet valve is provided to open and close a valve seat in an internal combustion engine. At the end of a valve stem of the valve, a cylindrical support is fixed, and on the outer circumferential surface of the support, a moving coil is wound. There is formed an annular cavity in a yoke fixed to a bracket fixed on a cylinder head, and a permanent magnet is fixed in the annular cavity of the yoke. Between the permanent magnet and the yoke in the annular cavity, the support which has the moving coil is inserted. By a control system having CPU, an electric current is applied to the moving coil, thereby providing optimum valve timing and lift to decrease seating noise and improving engine performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.