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. 06, 2019
Filed:
Nov. 30, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Tetsuya Sakuma, Gotemba, JP;
Yoshihisa Tsukamoto, Susono, JP;
Toyota Jidasha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
An exhaust gas control apparatus for an internal combustion engine includes: an SCR catalyst including transition metal ions for reducing NOin exhaust gas with NHas a reducing agent; detection means for detecting temperature of the SCR catalyst; and a heater configured to heat the SCR catalyst. When NOdoes not flow into the SCR catalyst, and the temperature detected by the detection means is below a first temperature that is a temperature causing exhibition of valence recovery of transition metal ions, the heater is controlled such that the SCR catalyst is heated up to a first temperature or above and that the SCR catalyst is maintained at or above the first temperature for a prescribed period so as to achieve valence recovery of the transition metal ions put in a deteriorated state.