Power-Split Continuously Variable Transmission Apparatus Having a Summing Planetary Transmission

Patent metadata

Field	Value
Publication number	US-2016290459-A1
Application number	US-201415035394-A
Country	US
Kind code	A1
Filing date	Oct 14, 2014
Priority date	Nov 14, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A power-split, continuously variable transmission device ( 1 ) with a summing planetary transmission ( 9 ), with at least one additional planetary gear set ( 10 ) and with one variator ( 8 ), which are in operative connection with each other in the area of shafts ( 11, 12, 13, 14 ) and can be coupled to each other by means of shift elements (S 1 bis S 3 ) for the presentation of at least three transmission ratio ranges in the area of additional shafts ( 15, 16, 11, 18, 14 ), is described. A transmission ratio is continuously variable within the transmission ratio ranges by means of the variator ( 8 ). The variator ( 8 ) is formed as a mechanical friction wheel variator with at least three shafts ( 11, 15, 17 ). The summing planetary transmission ( 9 ), the at least one additional planetary gear ( 10 ) and the variator ( 8 ) are arranged in a manner coaxial to each other. In one of the transmission ratio ranges, the total power can be guided between a transmission input shaft ( 2 ) and a transmission output shaft ( 7 ) by means of the variator ( 8 ). In addition, a friction wheel ( 26 ) of the variator ( 8 ) is designed to be at least approximately cone-shaped, at least in sections.

First claim

1 . Power-split, continuously variable transmission device ( 1 ) with a summing planetary transmission ( 9 ), with at least one additional planetary gear set ( 10 , 19 ) and with one variator ( 8 ), which are in operative connection with each other in the area of shafts ( 11 , 12 , 13 , 14 ) and can be coupled to each other by means of shift elements (S 1 to S 3 ) for the presentation of at least three transmission ratio ranges (V 1 to V 3 , R) in the area of additional shafts ( 11 , 14 , 15 , 16 , 18 ), whereas a transmission ratio is continuously variable within the transmission ratio ranges (V 1 to V 3 , R) by means of the variator ( 8 ), whereas the variator ( 8 ) is formed as a mechanical friction wheel variator with at least three shafts ( 11 , 15 , 17 ), the summing planetary transmission ( 9 ), the at least one additional planetary gear ( 10 , 19 ) and the variator ( 8 ) are arranged in a manner coaxial to each other, characterized in that, in one of the transmission ratio ranges (V 2 ), the total power can be guided between a transmission input shaft ( 2 ) and a transmission output shaft ( 7 ) by means of the variator ( 8 ), and a friction wheel ( 26 ) of the variator ( 8 ) is designed to be at least approximately cone-shaped, at least in sections.

2 - 15 . (canceled)

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Warth Viktor
• Reisch Matthias
• Sich Bernhard

Classifications

• F16H2037/0893

  characterised in that the ratio of the continuously variable transmission is different from zero when the output shaft speed is zero · CPC title

• F16H37/0853 Primary

  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

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

• F16H2037/0886

  with switching means, e.g. to change ranges · CPC title