Valve-operating system for internal combustion engine

Details Valve-operating system for internal combustion engine Valve-operating system for internal combustion engine

2006-04-07

2008-12-23

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090170, C123S090200, C123S090310, C123S090440

Reexamination Certificate

active

07467610

ABSTRACT:
A valve-operating system for an internal combustion engine includes cam followers which have cam abutment portions abutting against valve-operating cams provided on a camshaft and which are swingably carried in an engine body and operatively connected to engine valves biased in a closing direction by a valve spring. The cam followers are biased in a direction of abutment of the cam abutment portions against the valve-operating cams by a resilient biasing means different from the valve spring. A resilient biasing means includes a pull rod connected at one end thereof to the cam follower, and a compression coil spring interposed between the other end of the pull rod and the engine body to pull the pull rod to bias the cam follower in a direction of abutment of the cam abutment portion against the valve-operating cam. Thus, the resilient biasing means is constructed to be compact, leading to an increase in degree of freedom of the design of the structure of the valve-operating system.

REFERENCES:
patent: 6705256 (2004-03-01), Yamaki et al.
patent: 6948465 (2005-09-01), Daigo et al.
patent: 2006/0236963 (2006-10-01), Fujii et al.
patent: 11-81947 (1999-03-01), None
patent: 2004-36560 (2004-02-01), None

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