Lost motion assembly for a poppet valve of an internal...

Details Lost motion assembly for a poppet valve of an internal... Lost motion assembly for a poppet valve of an internal...

2005-05-03

2005-05-03

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090120, C123S090150, C123S19800E, C251S014000, C251S030010, C251S062000

Reexamination Certificate

active

06886511

ABSTRACT:
A lost motion assembly for a valve of an internal combustion engine includes a cam, a cam piston which is spring biased to follow motion of the cam, a valve piston operatively engaged with a poppet valve, and an auxiliary piston. The cam piston, valve piston and auxiliary piston are in continuous contact with a fluid in an enclosed control chamber having a fixed volume, such that rotation of the cam causes displacement of the cam piston into the control chamber, which causes a corresponding displacement of at least one of the valve piston and auxiliary piston while the volume of fluid in the control chamber remains substantially constant.

REFERENCES:
patent: 3612015 (1971-10-01), Hausknecht
patent: 4278233 (1981-07-01), Zurner et al.
patent: 5154143 (1992-10-01), Stutzenberger
patent: 6244257 (2001-06-01), Hu
patent: 6325028 (2001-12-01), Albanello et al.
patent: 6736092 (2004-05-01), Borean et al.

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