Engine with desmodromically actuated rocker

Details Engine with desmodromically actuated rocker Engine with desmodromically actuated rocker

2011-01-18

2011-01-18

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Valve driven closed

C123S090390

Reexamination Certificate

active

07870842

ABSTRACT:
An engine comprising a valve, cam lobe, rocker, follower member and an optional spring is disclosed herein. The valve may comprise a valve stem. The cam lobe may have a base circle and a nose. The cam lobe may be attached to a rotating shaft. The rocker may have a valve end portion contacting the valve, a lifter end portion defining a pivot axis of the rocker and a cam surface disposed between the valve end portion and the lifter end portion. The nose of the cam lobe may contact the cam surface for opening the valve. The follower member may be disposed adjacent the cam lobe opposite the rocker. The follower member may be attached to the rocker and have a curved inner surface upon which the nose of the cam lobe contacts for lifting the rocker. The spring may be disposed about the valve stem of the valve for closing the valve stem of the valve.

REFERENCES:
patent: 4858573 (1989-08-01), Bothwell
patent: 6053134 (2000-04-01), Linebarger
patent: 6877469 (2005-04-01), Lau
patent: 6945206 (2005-09-01), Mobley
patent: 2008/0060596 (2008-03-01), Decuir
patent: 2166799 (1984-11-01), None

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