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. 25, 2003
Filed:
Aug. 28, 2000
Applicant:
Inventors:
Massimo Ceccarani, Bologna, IT;
Corrado Rebottini, Crevalcore, IT;
Riccardo Bettini, Castello D'Argile, IT;
Piero Campi, Castelnuovo Rangone, IT;
Assignee:
Automobili Lamborghini S.p.A., Bologna, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 1/500 ;
U.S. Cl.
CPC ...
G01M 1/500 ;
Abstract
A process for detecting a misfire in one or more cylinders of an internal combustion engine, including sampling the exhaust gas pressure values during at least one engine cycle at a sampling frequency proportional to the crankshaft rotational speed, analyzing the sampled signal in the frequency domain, calculating a misfire index from the analysis, comparing the index with one or more threshold values, and identifying a misfire based on the comparison of the index with the threshold values.