Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2011-05-03
2011-05-03
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
07934478
ABSTRACT:
A lubricant circuit of a camshaft adjuster is provided. In conventional camshaft adjusters, lubricant is supplied from a cylinder head to the camshaft adjuster via a supply channel (66) and a receiving channel (69), with an annular groove that encircles in a circumferential direction being located between the supply channel and the receiving channel in order to ensure a continuous lubricant supply. According to the invention, the lubricant is transferred from the supply channel to the receiving channel in a discontinuous manner. The omission of the encircling annular groove causes a discontinuous or cyclic flow of lubricant so that lubricant is transferred only when the supply channel (66) is at least partially aligned with the receiving channel (69).
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Kohrs Mike
Schafer Jens
Eshete Zelalem
Schaeffler Technologies GmbH & Co. KG
Volpe and Koenig P.C.
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