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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 9421978 B1

PDFFull Text
Date of Patent:
Aug. 23, 2016

Filed:

Oct. 11, 2013

Continuously variable transmission and control method therefor

Applicant:

Jatco Ltd, Fuji-shi, Shizuoka, JP;

Inventors:

Mamiko Inoue, Ebina, JP;

Hiroyasu Tanaka, Atsugi, JP;

Masato Mori, Isehara, JP;

Assignee:

JATCO LTD, Fuji-Shi, Shizuoka, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Roger Pang

Int. Cl.
CPC ...
F16H 61/04 (2006.01); B60W 30/19 (2012.01); B60W 10/04 (2006.01); B60W 10/06 (2006.01); B60W 10/101 (2012.01); B60W 10/107 (2012.01); F16H 61/662 (2006.01); F16H 61/684 (2006.01); F16H 63/50 (2006.01); B60W 30/20 (2006.01); F16H 61/70 (2006.01); F16H 61/66 (2006.01);
U.S. Cl.
CPC ...
B60W 30/19 (2013.01); B60W 10/04 (2013.01); B60W 10/06 (2013.01); B60W 10/101 (2013.01); B60W 10/107 (2013.01); B60W 30/20 (2013.01); F16H 61/04 (2013.01); F16H 61/662 (2013.01); F16H 61/66259 (2013.01); F16H 61/684 (2013.01); F16H 61/702 (2013.01); F16H 63/50 (2013.01); F16H 2061/6605 (2013.01); F16H 2061/6614 (2013.01); Y10T 477/6217 (2015.01);
Abstract

A continuously variable transmission includes a variator, a sub-transmission mechanism, target value setting means configured to set a speed ratio corresponding to a select gear position as a target value of a through speed ratio which is an overall speed ratio of the variator and the sub-transmission mechanism, shift control means configured to perform a variator shift of downshifting the variator so that the through speed ratio reaches the target value and a coordinated shift of upshifting the variator to maintain the through speed ratio while downshifting the sub-transmission mechanism immediately after the variator is downshifted, and torque increasing means configured to increase a torque input to the continuously variable transmission from the power source more than a torque before the determination of the downshift instruction during the coordinated shift.

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