Rotational phase adjusting apparatus having fluid reservoir

Details Rotational phase adjusting apparatus having fluid reservoir Rotational phase adjusting apparatus having fluid reservoir

1997-08-08

1998-11-17

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 123 9034, 74568R, 464 2, F01L 1344

Patent

active

058362762

ABSTRACT:
In a vane-type rotational phase adjusting apparatus used for adjusting opening/closing timings of an intake valve or an exhaust valve of an engine, a housing unit driven by a driving shaft has a fan-shaped accommodating chamber between adjacent two of a plurality of shoes arranged circumferentially. A vane unit for driving a driven shaft is disposed in the housing unit with its vanes being disposed in the corresponding one of the accommodating chamber so that the rotational phase of the driven shaft is adjusted by the pressure of fluid in the accommodating chamber. Recesses are formed as fluid reservoirs in a cross-sectionally half circle shape on the circumferential end walls of the shoes to hold the operating fluid therein when the housing unit and the vane unit are at rest because of engine stop.

REFERENCES:
patent: 5107804 (1992-04-01), Becker et al.
patent: 5666914 (1997-09-01), Ushida et al.

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