Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2006-05-10
2009-08-25
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
07578275
ABSTRACT:
A device for variably setting the control times of gas exchange valves of an internal combustion engine is provided having a hydraulic actuator (18) with two reciprocally operating pressure chambers (12, 13) and with a pressure medium supply device (32) for supplying and withdrawing pressure medium to or from the pressure chambers (12, 13). The device (1) also includes at least one rotation angle limiting device (24) that in an unlocked state does not limit the phasing of the output element (3) in reference to the input element (2) but, in a locked state, limits it to a defined angular range or to a defined angle, with the rotation angle limiting device (24) being switched from the locked to the unlocked state by pressure medium being supplied. A control line (19) is provided for supplying and withdrawing pressure medium to or from the rotation angle limiting devices (24), with the control line (19) not communicating with the pressure medium supply device (32). A control valve (38) controls the supply and withdrawal of pressure medium to and from the control line (19). The control valve (38) comprises a hydraulic actuating mechanism (39) that is subjected to the action of pressure medium from the pressure medium supply device (32).
REFERENCES:
patent: 6053139 (2000-04-01), Eguchi et al.
patent: 6668778 (2003-12-01), Smith
patent: 2002/0043231 (2002-04-01), Hase
patent: 2004/0055550 (2004-03-01), Smith
patent: 0857859 (2003-08-01), None
patent: 1371818 (2003-12-01), None
patent: 1531240 (2005-05-01), None
patent: 1400661 (2006-07-01), None
AFT Atlas Fahrzeugtechnik GmbH
Eshete Zelalem
Volpe and Koenig P.C.
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