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:
Apr. 21, 2009
Filed:
Jul. 21, 2006
Daniele Ceccarini, Rimini, IT;
Matteo DE Cesare, Torremaggiore, IT;
Luca Poggio, Spinetta Marengo, IT;
Daniele Ceccarini, Rimini, IT;
Matteo De Cesare, Torremaggiore, IT;
Luca Poggio, Spinetta Marengo, IT;
Magneti Marelli Powertrain S.p.A., Turin, IT;
Abstract
A method for estimating the sulfur content in the fuel of an internal combustion engine equipped with a catalyser capable of storing a quantity of sulfur and NOgroups. The method provides use of a current sulfur concentration value (S) and a correction of the current sulfur concentration value (S) in order to obtain a new sulfur concentration value (S). The method includes the steps of estimating a first value (NO) of the total quantity of NOgroups stored in the catalyser () by means of a model of NOgroup production by the engine, estimating a second value (NO) of the total quantity of NOgroups stored by the catalyser by means of a model of storage of the catalyser, and determining an additive correction coefficient (D) as the difference between the first estimated value (NO) and the second estimated value (NO).