Patent · US Active

Automatic transmission

US8096914B2 · kind B2 · utility

3Cited by

4References

3Claims

0Family size

Assignee

JATCO LTD · JP

Inventors

Kazuaki Aota · Sagamihara, JP
Yukiyoshi Inuta · Yokohama, JP
Akihiro Yamamoto · Suita, JP
Naoki Kobayashi · Tokyo, JP
Takayuki Okuda · Atsugi, JP
Peter Tenberge · Friedrichshafen, DE
Joerg Mueller · Chemnitz, DE
Rico Resch · Freital, DE

Key dates

Filing date	Mar 25, 2010
Grant date	Jan 17, 2012
Priority date	—
Expiry date	Jul 11, 2030

Classification

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

Abstract

An automatic transmission including three single pinion planetary gearsets and six friction elements, in which an input shaft is always connected to a first sun gear of a first planetary gearset, the output shaft is always connected to a second ring gear of a second planetary gearset, a third sun gear of a third planetary gearset is always kept in a fixed state relative to a transmission case of the automatic transmission, a first ring gear of the first planetary gearset and a third pinion carrier of the third planetary gearset are always connected to each other and constitute a first rotary member, and at least eight forward speeds and one reverse speed are respectively established by simultaneous engagements of three friction elements selected from the six friction elements.

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