Patent · US Active

Low friction loss automatic transmission

US8414443B2 · kind B2 · utility

0Cited by

2References

4Claims

0Family size

Assignee

JATCO LTD · JP

Inventors

Kazuaki Aota · Sagamihara, JP
Yukiyoshi Inuta · Yokohama, JP
Akihiro Yamamoto · Suita, JP
Takayuki Okuda · Atsugi, JP
Joerg Mueller · Chemnitz, DE
Rico Resch · Freital, DE
Mirko Leesch · Gelenau, DE

Key dates

Filing date	Jun 13, 2011
Grant date	Apr 9, 2013
Priority date	—
Expiry date	Oct 17, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2200/2097
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An automatic transmission including a double pinion planetary gear unit PG1, two single pinion planetary gear units PG2 and PG3 and six frictional elements (viz., six clutches) C1 to C6 is so constructed as to establish nine forward speeds and one reverse speed by simultaneously putting selected three of the six frictional elements C1 to C6 into their engaged condition. The frictional elements C1 to C6 are of a type including mutually rotatable friction plates that cause production of an oil dragging resistance when the frictional element is under idling condition. With the simultaneously engaged condition of the three frictional elements, each speed is established with a reduced friction loss of the automatic transmission.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.