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:
Nov. 03, 2015
Filed:
Dec. 23, 2014
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Takeo Nagamori, Toyota, JP;
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A drive device for an electric vehicle includes: a parking lock mechanism that mechanically locks a rotation of a rotating shaft of drive wheels; a parking lock operating unit; an electric motor; a balancing torque estimating unit for applying rotational torque to the electric motor in the opposite direction of the direction of torsional torque applied to the rotating shaft, while locking via the parking lock mechanism is done, and for balancing torque in advance that balances out the torsional torque, based on a state of the rotational phase of the electric motor; and a torque applying unit for applying torque to the electric motor before the locking is released, the torque calculated based on the estimated balancing torque.