Valve driving device for an engine

Details Valve driving device for an engine Valve driving device for an engine

2005-02-22

2005-02-22

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090160, C123S090390, C123S090440, C123S090600

Reexamination Certificate

active

06857406

ABSTRACT:
A valve driving device including a tappet assembly adapted to slide in a tappet guide hole to drive a valve and including a high-speed center tappet and low-speed side tappet; and a high-speed center cam and a low-speed side cam provided corresponding to the center tappet and the side tappet. A depression is formed which is depressed from a base circle to roughly the same profile as a shaft section of the camshaft so that the cam portion over a predetermined angle range where a cam nose section is not formed in the centrally located center cam is smaller than the base circles of the outside located side cams in profile.

REFERENCES:
patent: 5651335 (1997-07-01), Elendt et al.
patent: 6223706 (2001-05-01), Maas et al.
patent: 6397804 (2002-06-01), Harada et al.
patent: 6457445 (2002-10-01), Sugawara
patent: 6470840 (2002-10-01), Ebesu et al.
patent: 2001-329907 (2001-11-01), None
patent: 2002-54413 (2002-02-01), None

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