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:
Jun. 18, 2002
Filed:
Jun. 22, 2000
Luigi P. Tozzi, Columbus, IN (US);
Cummins, Inc., Columbus, IN (US);
Abstract
An apparatus for diagnosing and controlling an ignition system of an Internal combustion engine includes an ignition coil controllable by an ignition control circuit, a spark voltage sensor electrically connected to the high tension side of the ignition coil secondary and an ion voltage sensor electrically connected to the low tension side of the ignition coil secondary. A computed processes the ion voltage signal to determine a combustion quality value and a roughness value. If the combustion quality value is outside a predefined range or if the roughness value exceeds a roughness threshold, the computer is operable to adjust the engine fueling, spark timing and/or spark energy.