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:
Feb. 18, 2003
Filed:
Aug. 06, 2001
Charles Francis Long, Pittsboro, IN (US);
Martin Robert Dadel, Indianapolis, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The power transmission has a fly-by-wire electro-hydraulic control mechanism that controls the engagement and disengagement of the range clutches in both forward and reverse operation. In forward operation, the control mechanism permits continued vehicle operation in the third forward range should electrical discontinuance occur during the first through fourth forward ranges, and in the fifth forward range should electrical discontinuance occur in the fifth or sixth forward range. Also, the control mechanism includes two logic valves and a forward on/off solenoid valve that permits the logic valves to control three torque-transmitting mechanisms with the use of two trim solenoid valves.