Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-04-17
2007-04-17
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090390, C123S090430
Reexamination Certificate
active
11091389
ABSTRACT:
The present invention includes a rocker arm16, which has an arm roller18at the center, a lash adjuster30for supporting a fulcrum P of the rocker arm16, an oscillation arm20, which has an oscillation cam surface (a non-pushing section24and a pushing section26) that is in contact with the arm roller18, and an adjustment mechanism for changing the reference arm rotation angle of the oscillation arm20in relation to the rocker arm16with a view toward changing the operating angle and lift amount of a valve disc12within a predetermined adjustment range. The adjustment mechanism includes a control shaft22, a roller contact surface32, a control arm34, and an oscillation roller arm38. The lash adjuster30is positioned so that its expansion/contraction direction is substantially parallel to a virtual straight line joining the rotation center Q of the oscillation arm20to the rotation center S of the arm roller18.
REFERENCES:
patent: 6425357 (2002-07-01), Shimizu et al.
patent: A 7-63023 (1995-03-01), None
patent: A 7-293216 (1995-11-01), None
patent: A 2003-239712 (2003-08-01), None
Denion Thomas
Eshete Zelalem
Toyota Jidosha & Kabushiki Kaisha
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