Patent · US Active

Automatic transmission

US8357068B2 · kind B2 · utility

1Cited by

9References

8Claims

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 22, 2013
Priority date	—
Expiry date	Dec 12, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2200/2048
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An automatic transmission includes first to third single-pinion planetary gearsets. The second ring gear and third sun gear are coupled to the first carrier and first ring gear respectively to constitute first and second rotor units. Input and output shafts are coupled to the second sun gear and third ring gear respectively. A first clutch selectively holds the first sun gear to the third carrier. A first brake selectively holds the first sun gear stationary. A second clutch selectively holds the second sun gear to the third carrier. A third clutch selectively holds the second carrier to the second rotor unit. A fourth clutch selectively holds the second carrier to the third carrier. A second brake selectively holds the first rotor unit stationary. At least eight gear ratios and one reverse gear ratio are obtained by simultaneous application of three of the clutches and brakes.

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