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:
Sep. 06, 2011
Filed:
Dec. 27, 2007
Hidenori Moriya, Susono, JP;
Ryo Tadokoro, Okegawa, JP;
Hidenori Moriya, Susono, JP;
Ryo Tadokoro, Okegawa, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
In this apparatus, maintaining control (time tto t) which instructs fixing of the open timing VVT of an intake valve is executed in a predetermined low load state. Subsequently, there are executed changing control which instructs changing of the open timing VVT by a predetermined amount (time t), and maintaining control which again instructs fixing of the open timing VVT of the intake valve (time tto t). An intake-valve control apparatus is determined to be 'anomalous' when an change amount Δave (=aveave) between the average aveof a large number of sample values of ΔMFBβ (combustion percentage increase amount within a predetermined crank angle range in an expansion stroke) during the maintaining control before execution of the changing control and the average aveof a large number of sample values of ΔMFBβ during the maintaining control after execution of the changing control is less than a predetermined value C.