Valve operating mechanism with roller rocker arm, 4-cycle...

Details Valve operating mechanism with roller rocker arm, 4-cycle... Valve operating mechanism with roller rocker arm, 4-cycle...

2007-04-17

2007-04-17

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C123S090440, C123S090160, C074S569000

Reexamination Certificate

active

10527248

ABSTRACT:
A valve gear includes a camshaft having valve gear cams, first and second rocker shafts, a first rocker arm supported on the first rocker shaft, and a second rocker arm supported on the second rocker shaft: The valve gear cams, respectively, include a cam nose projecting from a base circle, and the first rocker shaft supporting the first rocker arm is positioned forwardly of a center line, which passes through a center of the camshaft to extend axially of a cylinder, in a direction of rotation of the camshaft:. The first rocker shaft is shifted closer to the camshaft than a center of rotation of a roller bearing is, when the roller bearing won the first rocker arm contacts with the base circle of the valve gear cam.

REFERENCES:
patent: 5121716 (1992-06-01), Takahashi et al.
patent: 6705264 (2004-03-01), Onoue
patent: 54-145736 (1979-10-01), None
patent: 63-295811 (1988-12-01), None
patent: 02-161119 (1990-06-01), None
patent: 07-068892 (1995-03-01), None
patent: 07-097938 (1995-04-01), None

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