Infinite variable transmission with planetary gear set

US10030751B2 · kind B2 · utility

Assignee

• DANA LIMITED · US

Inventors

• Evrim Taskiran · Brussels, BE
• Benoit Vandevoorde · Evergem, BE
• Matthias W. J. Byltiauw · Gits, BE
• Mark R. J. Versteyhe · Erkegem, BE
• Thibaut E. Duchene · Woluwe-Saint-Lambert - Sint-Lambrechts-Woluwe, BE

Key dates

• Filing date: Nov 14, 2014
• Grant date: Jul 24, 2018
• Expiry date: Aug 10, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2037/0886
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A variable transmission includes various powerpath layouts consisting in either; a single mode with approximately symmetrical reverse and forward speeds and includes an input shaft, one or two planetary gear sets, or a planetary gear set and a compound gear set when the RTS (ring-to-sun) ratio of the planetary gear set is not physically possible; or a dual mode with each mode being selected by closing a clutch/brake and releasing the other. A first up-speed planetary gear set on the input side of a variator, and a second planetary gear set on the output side of the variator, both configured to split the torque when drivingly engaged with a variator comprising, a first ring assembly, and a second ring assembly. Various up-speed ratio arrangements are shown that tend to increase the speeds and decrease the torque acting on the CVP, allowing a decrease in the variator size.