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:
Jun. 15, 2010
Filed:
Feb. 14, 2007
Applicants:
Charles F. Long, Pittsboro, IN (US);
Bryan H. Hagelskamp, Carmel, IN (US);
Inventors:
Charles F. Long, Pittsboro, IN (US);
Bryan H. Hagelskamp, Carmel, IN (US);
Assignee:
GM Global Technology Operations, Inc., Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 61/26 (2006.01); F16H 59/00 (2006.01); B60W 10/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electro-hydraulic control system is provided for a transmission, which is preferably a countershaft transmission, that has a three-position dog clutch actuator valve to control the position of a three-position dog clutch. At least one of the positions of the dog clutch actuator valve is established by pressurized fluid directed to the dog clutch actuator valve by two logic valves, both of which are controlled to direct pressurized fluid elsewhere in the hydraulic control system, as well.