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:
Jun. 30, 2009
Filed:
Aug. 31, 2006
Shinya Kamada, Hiroshima, JP;
Junichi Doi, Hiroshima, JP;
Takamichi Teraoka, Hiroshima, JP;
Tokimori Saka, Hiroshima, JP;
Tatsutoshi Mizobe, Hiroshima, JP;
Naohiro Sakaue, Hiroshima, JP;
Yoshihiko Fujita, Hiroshima, JP;
Norio Iwashita, Hiroshima, JP;
Satoshi Komori, Hiroshima, JP;
Kazuhiko Ueda, Hiroshima, JP;
Seiji Esaki, Hiroshima, JP;
Shinya Kamada, Hiroshima, JP;
Junichi Doi, Hiroshima, JP;
Takamichi Teraoka, Hiroshima, JP;
Tokimori Saka, Hiroshima, JP;
Tatsutoshi Mizobe, Hiroshima, JP;
Naohiro Sakaue, Hiroshima, JP;
Yoshihiko Fujita, Hiroshima, JP;
Norio Iwashita, Hiroshima, JP;
Satoshi Komori, Hiroshima, JP;
Kazuhiko Ueda, Hiroshima, JP;
Seiji Esaki, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
In an automatic transmission (AT) in which an input shaft (Input) and an output gear (Output) are disposed on the same axis and three clutches (C-C) and two brakes (B, B) are selectively operated to provide six forward speeds, first and second planetary gear sets (GS, GS) are configured to consistently reduce the speed of input rotation and output the speed-reduced rotation, thereby enabling downsizing of them. The first and second planetary gear sets (GS, GS) are arranged in a transmission case at both the axial ends thereof. Third and fourth planetary gear sets (GS, GS) are connected to each other to have four rotation elements in combination, thereby constituting a Simpson planetary gear train. One of the four rotation elements (a fourth carrier (PC) in an illustrated example) is connected to the output gear (Output). Rotations input and reduced in speed by the first and second planetary gear sets (GS, GS) are input to sun gears (S, S) of the third and fourth planetary gear sets (GS, GS), respectively. First to third clutches (C-C) and a first brake (B) are arranged to surround the first and second planetary gear sets (GS, GS).