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. 20, 2008
Filed:
Sep. 22, 2006
Jared S. Shattuck, Indianapolis, IN (US);
Scott E. Mundy, Carmel, IN (US);
Mark A. Rains, Indianapolis, IN (US);
Jeffrey E Shultz, Zionsville, IN (US);
Jared S. Shattuck, Indianapolis, IN (US);
Scott E. Mundy, Carmel, IN (US);
Mark A. Rains, Indianapolis, IN (US);
Jeffrey E Shultz, Zionsville, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A method for determining the condition of a transmission fluid filter and controlling an operator indicator to alert the operator that the fluid filter requires replacement is disclosed. The method includes monitoring a fluid pressure switch, determining an operating mode of the transmission, determining whether the operating mode of the transmission is changing, activating a timer if the operating mode is changing, recording the time, comparing the time to a predefined time threshold, determining whether the recorded time is greater than the predefined threshold, and activating the operator indicator to indicate that the fluid filter requires replacement if the recorded time is greater than the predefined threshold.