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:
Dec. 15, 2015
Filed:
Jun. 05, 2012
Koichi Okada, Iwata, JP;
Yusuke Makino, Iwata, JP;
Koichi Okada, Iwata, JP;
Yusuke Makino, Iwata, JP;
NTN CORPORATION, Osaka, JP;
Abstract
Even when the effective radii of wheels differ from each other because of a change in tire pneumatic pressure, the difference in driving force between left and right drive wheels are substantially zeroed to suppress a turning force to thereby increase the traveling stability. The use is made of a corrector for correcting a command value to be outputted to a drive circuit for an electric drive motor for each of the drive wheels. This corrector receives the steering angle, the respective numbers of revolutions of the drive wheels and an electric drive motor current and corrects with the use of the steering angle as measured with respect to a traveling direction so that command values relative to the drive wheels may have such a relation that the turning force induced in a vehicle as a result of the difference in effective radius between the drive wheels can be suppressed.