Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-04-29
2008-04-29
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090390, C123S090440, C123S090480, C074S569000
Reexamination Certificate
active
11375348
ABSTRACT:
A switchable valve-drive component (1) for variable transmission of a stroke generated by one or more cam projections to a gas-exchange valve of an internal combustion engine is provided. The valve-drive component (1) has transmission elements (3, 4), which can be connected with a positive fit by coupling elements (8) in the transmission direction, in which force transmission surface sections (16) of the coupling elements (8) can be clamped between force transmission surface sections (20) of the transmission elements (3, 4). Here, at least one of the force transmission surface sections (16, 20) should be provided with a wear protection layer (23). This layer comprises at least one metal-free amorphous hydrocarbon layer with sp2-hybridized and sp3-hybridized carbon.
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patent: 6904935 (2005-06-01), Welty et al.
patent: 6969198 (2005-11-01), Konishi et al.
patent: 2005/0098134 (2005-05-01), Nishimura et al.
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“Verbrennungsmotor” [“Internal Combustion Engine”], first edition published in Apr. 2002 by Vieweg-Verlag; Chapter 10.4.2, pp. 357-359.
“Nockenwellenverstellungen für Ottomotoren” [“Camshaft Adjustments for Otto Engines”], published 2002 by Verlag Modeme Indsutrie, pp. 44-47.
Evans Matthew
Hosenfeldt Tim Matthias
Jones Jermel
Sailer Peter
Schnell Oliver
Chang Ching
Schaeffler KG
Volpe and Koenig P.C.
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