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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 11204092 B1

PDFFull Text
Date of Patent:
Dec. 21, 2021

Filed:

Feb. 17, 2017

Control device for automatic transmission

Applicant:

Jatco Ltd, Fuji, JP;

Inventors:

Ken Okahara, Fuji, JP;

Hiroyasu Tanaka, Fuji, JP;

Assignee:

Jatco Ltd., Fuji, JP;

Attorney:

Global IP Counselors, LLP

Primary Examiner:

Tinh Dang

Int. Cl.
CPC ...
F16H 59/06 (2006.01); F16H 61/14 (2006.01); B60W 30/188 (2012.01); F16H 59/18 (2006.01); F16H 59/38 (2006.01); F16H 59/70 (2006.01); F16H 61/04 (2006.01); F16H 61/66 (2006.01); F16H 63/46 (2006.01); F16H 59/36 (2006.01); F16H 61/662 (2006.01); B60W 10/02 (2006.01); F16H 61/00 (2006.01); B60W 50/00 (2006.01); G07C 5/08 (2006.01); F16H 61/16 (2006.01); F16H 59/02 (2006.01);
U.S. Cl.
CPC ...
F16H 59/06 (2013.01); B60W 10/02 (2013.01); B60W 10/023 (2013.01); B60W 10/024 (2020.02); B60W 10/026 (2013.01); B60W 10/0235 (2020.02); B60W 30/1884 (2013.01); F16H 59/18 (2013.01); F16H 59/36 (2013.01); F16H 59/38 (2013.01); F16H 59/70 (2013.01); F16H 61/04 (2013.01); F16H 61/14 (2013.01); F16H 61/66 (2013.01); F16H 61/662 (2013.01); F16H 61/66259 (2013.01); F16H 63/46 (2013.01); B60W 2050/0008 (2013.01); F16H 2059/0256 (2013.01); F16H 2061/0075 (2013.01); F16H 2061/166 (2013.01); G07C 5/0816 (2013.01);
Abstract

A control device for an automatic transmission includes a continuously variable transmission mechanism, a torque converter, a target transmission ratio calculation unit, a feedback control unit, and a phase compensation unit. The torque converter has a lock-up clutch. The target transmission ratio calculation unit is configured to calculate a target transmission ratio based on a travelling state. The feedback control unit is configured to perform feedback control based on an actual value indicative of a state of the continuously variable transmission mechanism. The phase compensation unit is configured to perform phase lead compensation of the feedback control based on the travelling state. The phase compensation control unit is configured to halt the phase lead compensation when an unstable travelling state of a vehicle is detected. The phase compensation control unit is further configured to release the lock-up clutch when the phase lead compensation is halted.

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