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. 23, 2002
Filed:
Oct. 05, 2000
Luca Poggio, Spinetta Marengo, IT;
Daniele Ceccarini, Rimini, IT;
Magneti Marelli S.p.A., , IT;
Abstract
A method is described for estimating the temperature of the exhaust gases upstream from a pre-catalyser disposed along an exhaust pipe of an internal-combustion engine, which is provided with a system for controlling the composition of the exhaust gases, comprising an oxygen sensor, which is disposed along the exhaust pipe, upstream from the pre-catalyser, a heater, which is associated with the oxygen sensor, and a control unit, which, inter alia, serves the purpose of piloting the heater. The method comprises the steps of: determining an operative quantity, which is correlated to an electrical power supplied to the heater, in order to keep the operative temperature of the oxygen sensor close to a target temperature; and determining the temperature of the exhaust gases upstream from the pre-catalyser, according to the said operative quantity.