Device for hydraulic rotational angle adjustment of a shaft rela

Details Device for hydraulic rotational angle adjustment of a shaft rela Device for hydraulic rotational angle adjustment of a shaft rela

1998-12-17

2000-04-25

Lo, Wellun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 74568R, 464 2, F01L 1344

Patent

active

06053138&

ABSTRACT:
A device for hydraulic rotational angle adjustment of a shaft to a drive wheel, especially the camshaft of an internal combustion engine, has ribs or vanes that are nonrotatably connected with the shaft, said ribs or vanes being located in the compartments of a compartmented wheel. The compartments of the compartmented wheel and the ribs and/or vanes produce pressure chambers by whose hydraulic pressurization the two structural elements can be rotated relative to one another. In order to secure the two structural elements against undesired rotation when an insufficient adjusting or retaining pressure is present, a common end face of the compartmented wheel and of the ribs and/or vanes cooperates with an annular piston that exerts a releasable clamping action on the parts that are rotatable relative to one another.

REFERENCES:
patent: 4858572 (1989-08-01), Shirai et al.
patent: 5219313 (1993-06-01), Danieli
patent: 5305719 (1994-04-01), Clarke et al.
patent: 5826552 (1998-10-01), Noguchi et al.

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