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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.:

US 9975553 B1

PDFFull Text
Date of Patent:
May. 22, 2018

Filed:

Feb. 13, 2014

Automatic transmission

Applicant:

Mazda Motor Corporation, Hiroshima, JP;

Inventors:

Koshiro Saji, Hiroshima, JP;

Shinya Kamada, Kure, JP;

Shotaro Nagai, Hiroshima, JP;

Assignee:

MAZDA MOTOR CORPORATION, Hirsoshima, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

Erin D Bishop

Int. Cl.
CPC ...
B60W 30/18 (2012.01); F16H 61/02 (2006.01); F16H 61/00 (2006.01); B60W 10/06 (2006.01); B60W 10/115 (2012.01); F16H 3/66 (2006.01);
U.S. Cl.
CPC ...
B60W 30/18054 (2013.01); B60W 10/06 (2013.01); B60W 10/115 (2013.01); F16H 3/66 (2013.01); F16H 61/0031 (2013.01); F16H 61/0206 (2013.01); B60W 2510/06 (2013.01); B60W 2510/1005 (2013.01); B60W 2520/10 (2013.01); B60W 2540/10 (2013.01); B60W 2540/12 (2013.01); B60W 2710/06 (2013.01); B60W 2710/1005 (2013.01); B60W 2710/1083 (2013.01); F16H 2200/0052 (2013.01); F16H 2200/201 (2013.01); F16H 2200/2043 (2013.01); F16H 2312/14 (2013.01);
Abstract

An automatic transmission includes a first frictional engagement element (a low clutch), a second frictional engagement element (an L/R brake), two hydraulic chambers (a gap adjustment chamberand a pressure chamber) provided in the second frictional engagement element, a first hydraulic pressure generator(an electric pump) generating a hydraulic pressure during an automatic stop of the engine, and a control unit (a control unit) controlling the hydraulic pressure in the first and second frictional engagement elements. The control unit supplies the hydraulic pressure generated by the first hydraulic pressure generator to the first frictional engagement element and one of the two hydraulic chambers of the second frictional engagement element when the automatic transmission is in the non-traveling range and the engine has been automatically stopped.

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