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:
Mar. 18, 2014
Filed:
Dec. 01, 2010
Charles F. Long, Pittsboro, IN (US);
Darren J. Weber, Indianapolis, IN (US);
John William Edward Fuller, Preston Lancashire, GB;
Charles F. Long, Pittsboro, IN (US);
Darren J. Weber, Indianapolis, IN (US);
John William Edward Fuller, Preston Lancashire, GB;
Allison Transmission, Inc., Indianapolis, IN (US);
Abstract
A fault diagnostic method for an automatic transmission may include monitoring an operating state of a trim system configured to selectively supply clutch engagement pressure and exhaust to at least one clutch control valve, determining an expected operating state of the trim system based on current operating conditions of the transmission, and generating a fault signal if the monitored operating state of the trim system is different from the expected operating state of the trim system.