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.:
Date of Patent:
Feb. 07, 2017
Filed:
Mar. 04, 2015
Jtekt Corporation, Osaka-shi, JP;
Mazda Motor Corporation, Aki-gun, JP;
Kotaro Sarai, Nishio, JP;
Tomoaki Kato, Kariya, JP;
Hiroto Kawano, Hiroshima, JP;
Daisuke Kofu, Hiroshima, JP;
Yasushi Yagi, Hiroshima, JP;
JTEKT CORPORATION, Osaka-shi, JP;
MAZDA MOTOR CORPORATION, Aki-gun, JP;
Abstract
A driving force distribution control apparatus includes: a driving force transmission device including a clutch which can change distribution of a driving force to front wheels and rear wheels of a four-wheel drive vehicle; and a controller which controls an engagement force of the clutch in accordance with a traveling state. The controller includes a different-diameter tire detector which detects an attachment of a different-diameter tire to one of the front wheels and the rear wheels when a rotation speed ratio between the front wheels and the rear wheels continues to be equal to or larger than a reference rotation speed ratio for a predetermined time. The different-diameter tire detector performs detection of the attachment of the different-diameter tire when it is determined that the wheels are unlikely to slip based on an outside condition.