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. 17, 2016
Filed:
Jul. 14, 2014
GM Global Technology Operations Llc, Detroit, MI (US);
Joel H. Gunderson, Canton, MI (US);
Derek Kinch, Ypsilanti, MI (US);
GM Global Technology Operations, LLC, Detroit, MI (US);
Abstract
A torque converter clutch (TCC) control valve system for a motor vehicle transmission includes a dual valve assembly with a first exhaust line that opens to air and a TCC control valve assembly with a second exhaust line that opens to air. The TCC control valve assembly communicates with the dual valve assembly through a fluid line, and the TCC control valve assembly further communicates with a torque converter having a lockup clutch. When the lockup clutch is in a faulted open state, air is drawn into the dual valve assembly through the first exhaust line. The air flows through the dual valve assembly and from the dual valve assembly though the fluid line to portions of the TCC control valve assembly, and from the TCC control valve assembly to the torque converter. The air replaces hydraulic fluid in the torque converter, and the displaced hydraulic fluid from the torque converter exits through the second exhaust line.