IDiyas

For the Inventor, By the Inventor

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 9254847 B1

PDFFull Text
Date of Patent:
Feb. 09, 2016

Filed:

Mar. 05, 2013

Speed ratio control device and speed ratio control method

Applicant:

Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;

Inventor:

Jun Inoue, Sagamihara, JP;

Assignee:

NISSAN MOTOR CO., LTD., Yokohama-shi, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Dirk Wright

Int. Cl.
CPC ...
F16H 61/662 (2006.01); B60W 30/18 (2012.01); F16H 59/50 (2006.01); B60W 10/06 (2006.01); B60W 10/10 (2012.01); F16H 59/14 (2006.01); F16H 61/02 (2006.01); F16H 59/66 (2006.01); F16H 59/52 (2006.01);
U.S. Cl.
CPC ...
B60W 30/18009 (2013.01); B60W 10/06 (2013.01); B60W 10/10 (2013.01); F16H 59/50 (2013.01); B60W 2530/22 (2013.01); B60W 2550/142 (2013.01); B60W 2720/106 (2013.01); F16H 59/14 (2013.01); F16H 61/0213 (2013.01); F16H 2059/525 (2013.01); F16H 2059/663 (2013.01); F16H 2061/0234 (2013.01);
Abstract

A speed ratio control device for an automatic transmission of a vehicle calculate a minimum engine rotation speed based on a travel load, and sets a target speed ratio such that the engine rotation speed does not fall below the minimum engine rotation speed. If the travel load of the vehicle is equal to or greater than a predetermined value, a higher value is used for the minimum engine rotation speed compared to a case when the travel load of the vehicle is smaller than the predetermined value. Re-acceleration performance of the vehicle under a high travel load as in a case when the vehicle travels uphill while towing another vehicle is thereby improved.

Find Patent Forward Citations

Loading…