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. 03, 2013
Filed:
Jul. 16, 2009
Tetsuji Tomita, Susono, JP;
Taku Ibuki, Gotenba, JP;
Yoshihisa Hirosawa, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
An apparatus for determining an abnormality of a control valve is applied to an internal combustion engine having a first supercharger, a second supercharger, a first control valve, and a second control valve. The apparatus includes an electronic control unit to obtain two supercharging-pressure-corresponding-values before and after an opening degree of the first control valve is changed during a period in which the engine is operated in a specific operating state under which the first supercharger supercharges the engine more efficiently than the second supercharger, and to determine whether or not the second control valve is abnormal based on the two values with respect to the change of the opening degree of the first control valve.