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:
Nov. 26, 2019
Filed:
Sep. 21, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
An exhaust gas control system includes a NSR catalyst, a fuel supply valve, a SCR catalyst an addition device, and an electronic control unit. When temperature of NSR catalyst is in a range of a predetermined first temperature range and temperature of SCR catalyst is in a range of a predetermined second temperature range, the electronic control unit is configured to add additive with the addition device, and execute predetermined air-fuel ratio processing to control the air-fuel ratio of exhaust gas flowing into the NSR catalyst. In the predetermined air-fuel ratio processing, the electronic control unit is configured to execute a second air-fuel ratio processing after a first air-fuel ratio processing, and execute the third air-fuel ratio processing after a first air-fuel ratio processing and the second air-fuel ratio processing and in succession to the second air-fuel ratio processing.