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, 1990
Filed:
Jun. 29, 1989
Applicant:
Inventors:
Gino Polito, Voghera, IT;
Franco Maloberti, Torre D'Isola, IT;
Assignee:
Marelli Autronica S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
324391 ; 324378 ; 73 35 ;
Abstract
The signal provided by an accelerometric sensor (S) connected to the engine is monitored in two frequency bands (f1, f2) in which peaks indicative of the presence of pinking (knocking) may appear. The intensity of the signal detected in the second band (f2) is compared (3) with the intensity of the signal detected in the first band (f1). The comparison (20) of the detection-signal component (F1 and/or F2) with the noise component (F3), in view of the emission of the pinking signal (21), is carried out in different ways (8, 13, 14) according to the relative ratios between the above intensities.