Adjustable cam shaft

Details Adjustable cam shaft Adjustable cam shaft

2006-05-02

2006-05-02

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Overhead camshaft

C123S090170, C123S090600, C029S888100

Reexamination Certificate

active

07036473

ABSTRACT:
An adjustable cam shaft includes an elongated shaft which may include multiple shaft sections rotatably coupled to one another. Intake and exhaust cam lobes are carried by the one or more shafts and are selectively rotatable relative to one another and selectively locked in place relative to one another in order to adjust a displacement angle between the cam lobes to alter intake and exhaust timing and other engine characteristics without the need to replace the cam shaft.

REFERENCES:
patent: 4917058 (1990-04-01), Nelson et al.
patent: 5253546 (1993-10-01), Elrod et al.
patent: 5855190 (1999-01-01), Matsunaga
patent: 6289764 (2001-09-01), Smith et al.
patent: 6343581 (2002-02-01), Suzuki
patent: 6539906 (2003-04-01), Rado et al.
patent: 6725817 (2004-04-01), Methley et al.

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