The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2011
Filed:
Feb. 27, 2008
Takaaki Kato, Anjo, JP;
Tsuyoshi Fukaya, Kariya, JP;
Takashi Ogawa, Toyohashi, JP;
Akihito Hongoya, Akazaki, JP;
Hiroyuki Tsukamoto, Chiryu, JP;
Takaaki Kato, Anjo, JP;
Tsuyoshi Fukaya, Kariya, JP;
Takashi Ogawa, Toyohashi, JP;
Akihito Hongoya, Akazaki, JP;
Hiroyuki Tsukamoto, Chiryu, JP;
Aisin AW Co., Ltd., Aichi-Ken, JP;
Abstract
To provide an automatic transmission apparatus for forward 8-speed, which keeps a transmission gear ratio step in good balance. The apparatus includes: a first planetary gear device PGhaving a ring gear Rconnected to an input shaft; a second planetary gear device PGhaving a carrier Cconnected to a carrier Cof the first planetary gear device, and a sun gear Sconnected to R; a third planetary gear device PGhaving a ring gear Rconnected to C; a fourth planetary gear device PGhaving a sun gear Sconnected to a sun gear Sof the third planetary gear device; a first clutch C-that selectively connects Sto the input shaft; a second clutch C-that selectively connects Cto the input shaft; a first brake B-that selectively regulates the rotation of R; a second brake B-that selectively regulates the rotation of R; a third brake B-that selectively regulates the rotation of S; and a fourth brake B-that selectively regulates the rotation of R. The apparatus further includes a third clutch C-that connects Rand Sto the input shaft, or connects Rto C. PGto PGare each provided as a single pinion type.