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. 04, 2002
Filed:
Oct. 30, 2000
Kumaraswamy V. Hebbale, Troy, MI (US);
Sekhar Raghavan, late of Troy, MI (US);
Patrick Benedict Usoro, Troy, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A powertrain has an engine, torque converter, and planetary transmission that includes an input shaft, an output shaft, two simple planetary gear sets, rive rotating torque transmitting mechanisms (clutches) and one stationary torque transmitting mechanism (brake). The planetary gear sets are interconnected with both a permanent interconnection and a selective interconnection. A first member of a first of the planetary gear sets is continuously connected with the output shaft and a first member of the second planetary gear set is continuously connected with a stationary portion of the transmission. Two of the clutches are operable to selectively connect the input shaft with the second and third members of the first planetary gear set, respectively. A third of the clutches is connectable between the second member of the second planetary gear set and the output shaft. The brake is selectively connectable between the second member of the first planetary gear set and the stationary portion. The third members of the planetary gear sets are continuously interconnected for common rotation. The second members of the planetary gear sets are selectively interconnectable by a fourth of the clutches. The second and third members of the second planetary gear set are selectively interconnectable by a fifth of the clutches. The clutches and brakes are selectively engaged in pairs to provide five forward drive ratios and one reverse ratio and interchanged to provide single transition shifts between the lowest four of the forward drive ratios and a double transition shift between the highest two of the forward ratios.