The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2013
Filed:
Feb. 12, 2009
Yoshihito Moriya, Nagoya, JP;
Yoshihito Moriya, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A control apparatus and a control method for a variable valve operating mechanism are employed for a multi-cylinder internal combustion engine including the variable valve operating mechanism and a valve stop mechanism. The variable valve operating mechanism includes a variable mechanism portion that changes a valve characteristic of an engine valve, and an actuator that drives the variable mechanism portion. The valve stop mechanism stops opening/closing of the engine valve in at least one cylinder. A controlled variable for the actuator is set so that an actual value of the valve characteristic matches a target value. A control characteristic value used to set the controlled variable, and used to make the actual value match the target value, is set such that when a reduced-cylinder operation is performed, the control characteristic value is different from the control characteristic value when an all-cylinder operation is performed.