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:
Jul. 24, 2018
Filed:
Oct. 25, 2013
Mitsubishi Heavy Industries Engine & Turbocharger, Ltd., Kanagawa, JP;
Ko Takayanagi, Tokyo, JP;
Mitsubishi Heavy Industries Engine & Turbocharger, Ltd., Kanagawa, JP;
Abstract
In embodiments, an exhaust gas purification apparatus and method for an internal combustion engine initializes a SCR catalyst by heating the SCR catalyst under predetermined conditions without accompanying troublesome procedures and complicated calculations. With the exhaust gas purification apparatus for an internal combustion engine, arranged on an exhaust-gas passage of the internal combustion engine and including the SCR catalyst for purifying NOx in exhaust gas in the internal combustion engine, the method calculates and accumulates estimated values of NHadsorption adsorbed on the SCR catalyst, on the basis of the amount of NHinjection from urea-aqueous solution injected into the exhaust-gas passage from the upstream side of the SCR catalyst and the amount of NHinjection for purifying NOx at the upstream side of the SCR catalyst, and initializing the SCR catalyst by heating the SCR catalyst to initialize the estimated value of NHadsorption.