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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 8989979 B1

PDFFull Text
Date of Patent:
Mar. 24, 2015

Filed:

Aug. 05, 2013

Control unit for four-wheel-drive vehicle

Applicant:

Jtekt Corporation, Osaka-shi, JP;

Inventors:

Kenta Taniguchi, Anjo, JP;

Akira Kodama, Chiryu, JP;

Tomoaki Kato, Kariya, JP;

Masaki Mita, Chiryu, JP;

Assignee:

JTEKT Corporation, Osaka-shi, JP;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Imran Mustafa

Int. Cl.
CPC ...
G06F 7/00 (2006.01); G06F 17/00 (2006.01); G06F 19/00 (2011.01); G06F 7/70 (2006.01); G06G 7/00 (2006.01); G06G 7/76 (2006.01); B60B 39/00 (2006.01); B60T 7/12 (2006.01); G05D 1/00 (2006.01); B60K 17/34 (2006.01); B60K 17/35 (2006.01); B60K 23/08 (2006.01); B60K 28/16 (2006.01); B60W 30/20 (2006.01); B60W 10/06 (2006.01); B60W 10/119 (2012.01); B60W 30/18 (2012.01);
U.S. Cl.
CPC ...
B60K 17/34 (2013.01); B60K 17/35 (2013.01); B60K 23/08 (2013.01); B60K 23/0808 (2013.01); B60K 28/16 (2013.01); B60W 30/20 (2013.01); B60W 10/06 (2013.01); B60W 10/119 (2013.01); B60W 30/18172 (2013.01); B60W 2510/0241 (2013.01); B60W 2720/403 (2013.01); B60Y 2300/424 (2013.01);
Abstract

A four-wheel-drive vehicle includes a clutch that is able to allow and interrupt transmission of driving force to a propeller shaft, and a traction control unit that controls at least one of the driving force generated by an engine and braking force applied to right and left front wheels to suppress a slip of the right and left front wheels. When the drive mode is switched from a two-wheel-drive mode to a four-wheel-drive mode, if the relative rotational speed between a first rotary member and a second rotary member constituting a clutch is equal to or higher than a predetermined value, an ECU outputs a control command signal for suppressing the slip of the right and left front wheels to the traction control unit.

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