Device for the variable control of gas exchange valves in an...

Details Device for the variable control of gas exchange valves in an... Device for the variable control of gas exchange valves in an...

2005-08-16

2005-08-16

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090600

Reexamination Certificate

active

06928970

ABSTRACT:
The invention relates to a device for variable control of the gas exchange valves of an internal combustion engine, of which at least one gas exchange valve is triggered by a cam of a camshaft, which cam has a cam contour with a circular portion of the cam bottom and a cam apex portion. For variably adjusting the cam contour, a pressure-fluid-actuated piston guided by the cam and retractable and extensible radially continuously, is provided which on its end forms at least a part of the cam apex portion.

REFERENCES:
patent: 4886022 (1989-12-01), Nakai
patent: 5253546 (1993-10-01), Elrod et al.
patent: 5404770 (1995-04-01), Kruger
patent: 5404844 (1995-04-01), Schechter
patent: 5505168 (1996-04-01), Nagai et al.
patent: 37 05 128 (1988-09-01), None
patent: 239579 (1925-09-01), None
patent: WO 95/23912 (1995-09-01), None

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