Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-08-14
2007-08-14
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090200, C123S090150, C123S090170, C123S090310, C074S56800M, C074S569000
Reexamination Certificate
active
11299381
ABSTRACT:
The present invention provides a variable valve lift apparatus for vehicle engines. A low-speed arm is installed in a high-speed arm to overlap the high-speed arm. A compression pin, a center pin, and a return spring are installed in a roller shaft of the low-speed arm and both cylinders of the high-speed arm. Further, an oil passage extends through a rocker arm shaft boss and a side body of the high-speed arm to the cylinder having the compression pin. Such a construction reduces the overall width of the apparatus, allows respective valves to be independently controlled, reduces design limitations due to the interference with a cam journal, and easily ensures an oil path. Further, a latching pin (the compression pin and the center pin) is supported at two places, thus enhancing the reliability and stability of a latching operation.
REFERENCES:
patent: 6752107 (2004-06-01), Kreuter
patent: 05-044418 (1993-02-01), None
patent: 06-101436 (1994-04-01), None
patent: 11-036833 (1999-02-01), None
patent: 11-229834 (1999-08-01), None
patent: 2001-020711 (2001-01-01), None
Denion Thomas
Hyundai Motor Company
Morgan & Lewis & Bockius, LLP
Riddle Kyle M.
LandOfFree
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