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US Patent 7322327 Lubrication structure of camshaft with variable valve timing

Patent 7322327 was granted and assigned to Hyundai Motor Company on January, 2008 by the United States Patent and Trademark Office.

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Patent
Patent
1

Patent attributes

Current Assignee
Hyundai Motor Company
Hyundai Motor Company
1
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
73223271
Patent Inventor Names
Suc Tae Kim1
Date of Patent
January 29, 2008
1
Patent Application Number
116461061
Date Filed
December 26, 2006
1
Patent Citations Received
‌
US Patent 12000314 System and method for variable valve timing
2
Patent Primary Examiner
‌
Ching Chang
1
Patent abstract

A lubrication structure for a camshaft with variable valve timing includes an advance hole, which includes an advance flow passage formed in a camshaft body. An end of the camshaft is attached to a continuously variable valve timing. A retard hole, which includes a retard flow passage, is formed in the camshaft body and spaced horizontally from the advance hole. A divergence flow passage has an end that surface-contacts the camshaft and is extended to communicate with the retard hole at an upper surface of a mounting part of a cylinder head. The other end of the divergence flow passage communicates with the slip surface on which the camshaft lays via a counter bore, so as to prevent lubrication film from being broken by load of the sprocket at an engine idle state or at an initial stage of cold starting.

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