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:
Aug. 18, 2015
Filed:
Nov. 18, 2010
Norihisa Nakagawa, Numazu, JP;
Takashi Nishikiori, Susono, JP;
Norihisa Nakagawa, Numazu, JP;
Takashi Nishikiori, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
Provided is a control apparatus for an internal combustion engine, which can determine whether or not there is a failure concerning a switching of an operational state of an intake valve, in the internal combustion engine that includes a valve stop mechanism that is capable of switching the operational state of the intake valve between a valve operating state and a valve closed/stopped state, without the need of adding a new sensor for the failure determination. An intake variable valve operating apparatus () is provided that includes a valve stop mechanism capable of switching the operational state of the intake valve () between the valve operating state and the valve closed/stopped state. A crank angle sensor () is provided for detecting the crank angle of the internal combustion engine (). An intake pressure sensor () is provided for detecting the actual intake pressure pim. It is determined whether or not there is a failure concerning the switching of the operational state of the intake valve () between the valve operating state and the valve closed/stopped state by the valve stop mechanism, based on an intake pressure difference dlpm (first difference) between the actual intake pressure pim and the pseudo intake pressure pmcrt at a predetermined crank angle (for example, 60° CA after the top dead center in each cylinder).