US Patent 7565887 Valve actuation device of internal combustion engine

Patent 7565887 was granted and assigned to Hitachi on July, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Hitachi

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7565887

Date of Patent

July 28, 2009

Patent Application Number

11446138

Date Filed

June 5, 2006

Patent Primary Examiner

‌

Ching Chang

Patent abstract

For an internal combustion engine, there is provided a valve actuation device which comprises a cam shaft having thereon at least first and second cams that are different in profile; a first rocker arm that is in contact with the first cam to be swung, the first rocker arm being adapted to actuate an engine valve; a second rocker arm that is in contact with the second cam to be swung; a coupling mechanism that selectively couples and uncouples the first and second rocker arms; and an electric actuating mechanism that actuates the coupling mechanism with an electric power for the selective coupling and uncoupling.