Valve mechanism for internal combustion engine

Details Valve mechanism for internal combustion engine Valve mechanism for internal combustion engine

2005-04-14

2010-06-08

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C123S090160

Reexamination Certificate

active

07730862

ABSTRACT:
A valve mechanism for an internal combustion engine includes a first rocker arm (4) connected to an intake or exhaust valve and supported on a rocker shaft (3a), a second rocker arm (5) supported on the rocker shaft for being rotationally driven by a cam, a cylinder (10) formed on one of the first and second rocker arms (4, 5) and a first piston (11) provided in the cylinder, a contacting projection (4a) projecting on the other one of the first and second rocker arms, a return spring (12) for biasing the first piston in a direction in which the first piston contacts with the contacting projection, and a second piston (14) for displacing the first piston to a position at which the first piston does not contact with the contacting projection. The two pistons extend in parallel to each other when the first piston is at a non-contacting position.

REFERENCES:
patent: 6484681 (2002-11-01), Kuroda et al.
patent: 7107953 (2006-09-01), Takayasu et al.
patent: 2004/0016413 (2004-01-01), Murata et al.
patent: 1598251 (2005-03-01), None
patent: 2002-70517 (2002-03-01), None
patent: 2003-343226 (2003-12-01), None
patent: 2003-343227 (2003-12-01), None
patent: 2005-90409 (2005-04-01), None

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