Patent · US Active

Automatic transmission

US8475322B2 · kind B2 · utility

2Cited by

4References

3Claims

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 8, 2011
Grant date	Jul 2, 2013
Priority date	—
Expiry date	Dec 1, 2031

Classification

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

Abstract

An automatic transmission includes a double-pinion planetary gearset and two single-pinion planetary gearsets. A first ring gear is held stationary. A second sun gear and a third ring gear are coupled to a first sun gear and a first carrier respectively, constituting first and second rotor units. An output is coupled to a third carrier. A first clutch selectively couples a second carrier to the first rotor unit. A second clutch selectively couples the second carrier to the second rotor unit. A third clutch selectively couples an input to the second carrier. A fourth clutch selectively couples a second ring gear to a third sun gear. A fifth clutch selectively couples the second ring gear to the third carrier. A sixth clutch selectively couples the input to the third sun gear. Nine forward gear ratios and one reverse gear ratio are obtained by simultaneous application of three of the clutches.

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