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:
Jul. 14, 2015
Filed:
Nov. 09, 2011
Akira Kikuchi, Hitachi, JP;
Tomohiko Yasuda, Kashiwa, JP;
Takayuki Sato, Kashiwa, JP;
Kichio Nakajima, Kasumigaura, JP;
Hiroyuki Kobayashi, Hitachi, JP;
Akira Kikuchi, Hitachi, JP;
Tomohiko Yasuda, Kashiwa, JP;
Takayuki Sato, Kashiwa, JP;
Kichio Nakajima, Kasumigaura, JP;
Hiroyuki Kobayashi, Hitachi, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
Provided is an electrically driven vehicle that is capable of suppressing drive wheel slippage without increasing the pitching vibration of the vehicle. The electrically driven vehicle having electric motors (), drive wheels () driven by the electric motors respectively, and, when at least one of the drive wheels slips, an electric motor control device () for reducing the torque of at least one of the electric motors that drives the at least one wheel slipped, and for restoring the torque of the at least one electric motor when the slippage is stopped includes a pitching detection device () for detecting the amplitude of pitching vibration to which the vehicle is subjected. The amount of torque of the at least one electric motor to be restored by the electric motor control device over a predetermined period of time after the slippage is stopped varies depending on whether or not the amplitude A detected by the pitching detection device is greater than an assessment value A