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. 26, 2005
Filed:
Nov. 15, 2002
Kevin R. Carlstrom, Fort Wayne, IN (US);
Gerald L. Larson, Fort Wayne, IN (US);
Frank Bondarowicz, Park Ridge, IL (US);
Kevin R. Carlstrom, Fort Wayne, IN (US);
Gerald L. Larson, Fort Wayne, IN (US);
Frank Bondarowicz, Park Ridge, IL (US);
International Truck Intellectual Property Company, LLC, Warrenville, IL (US);
Abstract
A motor vehicle having an internal combustion engine and a lubricating oil circulation system provides estimates of the distance remaining before an oil change becomes imperative. An indirect estimate of the depletion of various additives and the deterioration of oil operating characteristics is based on engine operating variables including oil temperature, ignition timing and engine load. The limit of depletion of total base number is dynamic, since it is set against total acid number and the two figures are independently calculated.