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:
May. 26, 1992
Filed:
May. 23, 1991
Applicant:
Inventors:
Eraldo Giaccardi, Turin, IT;
Alessandro Dassetto, Turin, IT;
Assignee:
Fiat Auto SpA, Turin, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P / ; F02P / ;
U.S. Cl.
CPC ...
123620 ; 123643 ; 123644 ;
Abstract
The device comprises a primary winding in which the spark energy is stored to be transferred rhythmically to a secondary winding with respective voltage step-up transformers acting between the secondary winding and the spark plugs. An amperometric resistor is arranged in series with the diode through which the current flows when the energy is transferred to the plugs. For each spark, there is a corresponding voltage peak across the terminals of the resistor, whereby a failure to detect the presence of the peak (which is usually converted into a square-wave signal) identifies the absence of a spark.