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. 27, 2019
Filed:
Mar. 04, 2019
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Kohei Mori, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
An exhaust gas control apparatus for an internal combustion engine includes a selective reduction catalyst (SCR), a urea solution supply device and a control device. The control device diagnoses abnormality of the SCR in accordance with an amount of ammonia that is discharged to a downstream side of the SCR when supplying a urea solution in a supply amount at an abnormality diagnosis time that is a supply amount larger than a target supply amount to the SCR. Further, the control device performs control of decreasing a supply amount of the urea solution when predetermined conditions are satisfied after abnormality diagnosis of the SCR. Here, the predetermined conditions are that an estimated amount of ammonia adsorbed by the SCR is larger than the reference adsorption amount, and an amount of the urea solution required in removal of nitrogen oxide per unit is smaller than a reference urea solution amount.