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:
Jan. 22, 2019
Filed:
Jul. 25, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;
Abstract
An apparatus according to the present invention is adapted to calculate an NOstorage rate defined as the rate of the quantity of NOstored into the NSR catalyst to the quantity of NOflowing into the NSR catalyst, based on quantity of NOflowing into the NSR catalyst and the quantity of NOflowing out of the NSR catalyst in a state in which the amount of NOstored in the NSR catalyst is equal to or larger than the breakthrough start amount of a criterion catalyst and the flow rate of exhaust gas flowing through the NSR catalyst is equal to or higher than a predetermined lower limit flow rate. The apparatus diagnoses the NSR catalyst as normal if the NOstorage rate thus calculated is equal to or higher than a predetermined threshold and as abnormal if the NOstorage rate is lower than the predetermined threshold.