Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-05-29
2007-05-29
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090440, C123S090600
Reexamination Certificate
active
11198537
ABSTRACT:
A valve drive for charge-cycling valves of internal combustion engines, which are held in the closed position by means of spring force, and can optionally be activated by a main cam or additionally by a secondary cam of a camshaft, in which connection the main cam with its elevation curve and angle setting is adapted to the crankshaft of a charge-cycling process to be controlled, and the secondary cam operates separately from the main cam. The drive variably controls an additional opening procedure of a charge-cycling valve, separate from the charge-cycling stroke to be controlled directly, in order to sensitively regulate the exhaust gas feed-back in this manner. The drive has two engagement surfaces for introducing movements on a pivot lever mounted on the cylinder head, which activates at least one charge-cycling valve. The first engagement surface on the pivot lever engages the main cam and the second engagement surface on the pivot lever contacts a transfer device for variable adjustment of the valve lift, driven by the second cam.
REFERENCES:
patent: 5121716 (1992-06-01), Takahashi et al.
patent: 5937807 (1999-08-01), Peters et al.
patent: 6668779 (2003-12-01), Hendriksma et al.
patent: 7007650 (2006-03-01), Harmon
patent: 44 24 802 (1994-07-01), None
patent: 199 05 364 (1999-02-01), None
patent: 101 56 309 (2002-07-01), None
patent: 976076 (1951-03-01), None
patent: 03-202 603 (1991-09-01), None
Chang Ching
Collard & Roe P.C.
IAV GmbH Ingenieurgesellschaft Auto und Verkehr
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