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:
Apr. 07, 2015
Filed:
Jun. 17, 2013
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Peter John Giles, Ypsilanti, MI (US);
Michael A. Turley, Dexter, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/00 (2006.01); F16H 61/02 (2006.01);
U.S. Cl.
CPC ...
F16H 61/0213 (2013.01);
Abstract
A method of determining a current operating range of a transfer case includes continuously calculating current Combined Drive Ratio (CDR), and categorizing the current CDR into one of a pre-determined number of expected CDRs. Counters are used to track when the current CDR is identified as an expected CDR. The different counters are then analyzed using simple mathematical operations to identify which gear ratio the transfer case is currently operating in.