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. 24, 2011
Filed:
Mar. 30, 2009
Mark A. Rains, Indianapolis, IN (US);
Randall S. Conn, Indianapolis, IN (US);
Mark A. Rains, Indianapolis, IN (US);
Randall S. Conn, Indianapolis, IN (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system for determining the type of hydraulic fluid employed in a transmission includes a translating valve, a valve position sensor, a hydraulic fluid temperature sensor, and a controller. The valve position sensor is operable to measure the actual time the valve takes to translate within the hydraulic fluid. The controller is operable to compare the actual time of valve translation to an expected time of valve translation. If the actual time of valve translation is different than the expected time of valve translation to a predetermined degree, the controller is operable to signal an operator of the motor vehicle or a service technician that the hydraulic fluid being used in the transmission is not meeting operating expectations.