Device for the relative angular adjustment of a camshaft...

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing

Reexamination Certificate

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C123S090150, C123S090310

Reexamination Certificate

active

06971352

ABSTRACT:
In an adjustment device for a camshaft of an internal combustion engine for varying the phase relationship of a camshaft with respect to a crankshaft as a function of the operating point of the internal combustion engine, the adjustment device comprises an epicyclic gear structure with a drive-side and an output side ring wheel, which are in meshing engagement with planet wheels, and the output-side ring wheel has a number of teeth different from that of the drive-side ring wheel so that the position of the camshaft relative to the crankshaft can be adjusted via an electric servomotor which drives a central sun wheel.

REFERENCES:
patent: 3978829 (1976-09-01), Takahashi et al.
patent: 4850247 (1989-07-01), Yu
patent: 4988329 (1991-01-01), Lammers
patent: 6523512 (2003-02-01), Axmacher et al.
patent: 41 33 408 (1993-04-01), None
patent: 100 38 354 (2002-02-01), None

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