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:
Feb. 13, 2001
Filed:
Feb. 19, 1999
Gabriele Serra, S. Lazzaro di Savena, IT;
Carlo Rossi, Bologna, IT;
Giorgio Minelli, Bologna, IT;
Piero Azzoni, S. Lazzaro di Savena, IT;
Davide Moro, Bologna, IT;
Magneti Marelli S.p.A., Milando, IT;
Abstract
Method for determining the progress of internal pressure of a cylinder in an internal combustion engine, defining for each combustion cycle of the engine, the phases of defining the effective operating point of the engine according to the value assumed by a number of operational parameters of the engine; recording the progress of immediate angular speed of the engine shaft; calculating a transfer function involving the angular speed and the internal pressure of the cylinder at the effective defined operational point, on the basis of a plurality of reference transfer functions between internal pressure and angular speed relative to reference operating points of the engine; and deriving the progress of internal pressure at the cylinder of the transfer function at the actual operating point and of the progress of angular speed.