US Patent 7513231 Valve gear of internal combustion engine

Patent 7513231 was granted and assigned to Toyota on April, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Toyota

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7513231

Date of Patent

April 7, 2009

Patent Application Number

10582120

Date Filed

December 15, 2004

Patent Primary Examiner

‌

Ching Chang

Patent abstract

There is provided a valve gear (11) with a motor (12), a cam mechanism (14) which converts a rotational motion of the motor (12) into a linear motion of an intake valve (2) by a cam (21), and a motor control apparatus (30) which controls the motor (12) such that an acceleration characteristic during a lift of the intake valve (2) changes in correspondence to a rotation number of an internal combustion engine.