Ball type continuously variable transmission/infinitely variable transmission

Patent metadata

Field	Value
Publication number	US-8986150-B2
Application number	US-201314020593-A
Country	US
Kind code	B2
Filing date	Sep 6, 2013
Priority date	Sep 7, 2012
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

A variable transmission includes an input shaft, a planetary gear set drivingly engaged with a variator comprising, a variator carrier assembly, a first ring assembly, and a second ring assembly; and the output shaft, arranged with various combinations of brakes and clutches to produce transmissions with continuously variable or infinitely variable torque output ratios.

First claim

What is claimed is:

1. A variable transmission comprising:
an input shaft;
a planetary gear set having a ring gear drivingly engaged with the input shaft;
a variator comprising a variator carrier assembly, a first ring assembly, and a second ring assembly, the second ring assembly driving engaged to an output of the variable transmission;
a planetary gear carrier coupled to a first brake and to the first ring assembly; and
a sun gear coupled to a second brake and a variator carrier.

2. The variable transmission of claim 1 , wherein when the second brake is engaged and the first brake is disengaged, the sun gear of the planetary gear set is fixed with a carrier of the variator to engage a continuously variable mode.

3. The variable transmission of claim 1 , wherein input power passes through the ring gear of the planetary gear set to the first ring assembly when the transmission is in a continuously variable mode.

4. The variable transmission of claim 1 , wherein when the first brake is engaged and the second brake is disengaged, a carrier of the planetary gear set and an input ring assembly is fixed, to engage an infinitely variable mode.

5. The variable transmission of claim 1 , wherein a transition between a continuously variable mode and an infinitely variable mode is accomplished by simultaneously releasing one of the first brake and the second brake while applying the other of the first brake and the second brake.

Assignees

• Dana Ltd

Inventors

• Versteyhe Mark R J
• Byltiauw Matthias W J
• Ziech James F

Classifications

• F16H37/0853

  CVT using friction between rotary members having a first member of uniform effective diameter cooperating with different parts of a second member · CPC title

• F16H15/52 Primary

  in which a member of uniform effective diameter mounted on a shaft may co-operate with different parts of another member · CPC title

• F16H37/022

  the toothed gearing having orbital motion · CPC title

• F16H2200/2035

  with two engaging means · CPC title

• F16H15/503 Primary

  in which two members co-operate by means of balls or rollers of uniform effective diameter, not mounted on shafts · CPC title