US Patent 7360515 Control apparatus for an internal combustion engine

Patent 7360515 was granted and assigned to Denso on April, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Denso

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73605150

Patent Inventor Names

Keiji Hoshino0

Date of Patent

April 22, 2008

Patent Application Number

117858190

Date Filed

April 20, 2007

Patent Primary Examiner

‌

Ching Chang

Patent abstract

A variable valve mechanism performs a valve lift switching operation for an intake valve. ECU defines valve lift switching characteristics corresponding to the engine operating region and executes the valve lift switching operation based on the switching characteristics. ECU calculates a parameter fluctuation amount of an engine occurring in response to the valve lift switching operation, and corrects the valve lift switching characteristics when the calculated parameter fluctuation amount exceeds a predetermined judgment value.