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. 07, 2005
Filed:
Apr. 25, 2003
Taeyoung Han, Bloomfield Hills, MI (US);
Su-chee Simon Wang, Troy, MI (US);
Mark K Krage, Troy, MI (US);
Yingjie Lin, El Paso, TX (US);
Taeyoung Han, Bloomfield Hills, MI (US);
Su-Chee Simon Wang, Troy, MI (US);
Mark K Krage, Troy, MI (US);
Yingjie Lin, El Paso, TX (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
An oil change sensing system for an internal combustion engine, having an oil pressure sensor adapted to provide an oil pressure signal to an engine control module; an oil temperature sensor adapted to provide an oil temperature signal to the engine control module; wherein the engine control module comprises an algorithm which determines the oil's viscosity by using the measured oil temperature and oil pressure and the determined oil viscosity and a fresh oil viscosity are used to determine whether the oil is in a preferred operating range.