Invention Grant
- Patent Title: Multiple speed automatic transmission
- Patent Title (中): 多速自动变速器
-
Application No.: US11657958Application Date: 2007-01-25
-
Publication No.: US07766785B2Publication Date: 2010-08-03
- Inventor: Steve G. Thomas , Donald E. Hoffman , Gregory D. Goleski
- Applicant: Steve G. Thomas , Donald E. Hoffman , Gregory D. Goleski
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: MacMillan, Sobanski & Todd, LLC
- Agent David B. Kelley
- Main IPC: F16H3/62
- IPC: F16H3/62

Abstract:
A multiple-speed automatic transmission includes an input, output, a first gear unit drivable connected to the input and including a component rotating at the speed of the input and a first gear unit output, the first gear unit producing a gear ratio of a speed of the input and a speed of a first gear unit output, the gear ratio being greater than unity, and a Ravigneaux gear unit for producing multiple ratios of the speed of the input and a speed of the output, the Ravigneaux gear unit being driveably connected to first, second, third, fourth, fifth and sixth rotating members and the output. A first clutch connects the first gear unit output and the first rotating member; a second clutch connects the first gear unit output and the second rotating member; a third clutch connects the third rotating member and one of the input and the rotating component, a fourth clutch connects the fourth rotating member and one of the input and the component; a first brake holds the fifth rotating member against rotation; and a second brake holds the sixth rotating member against rotation.
Public/Granted literature
- US20080182704A1 Multiple speed automatic transmission Public/Granted day:2008-07-31
Information query