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:
Sep. 02, 2014
Filed:
Oct. 28, 2011
Shigenori Iwase, Aichi-ken, JP;
Tadashi Yamada, Aichi-ken, JP;
Hiroshi Murata, Aichi-ken, JP;
Nobuyoshi Uematsu, Aichi-ken, JP;
Takashi Ushio, Aichi-ken, JP;
Shigenori Iwase, Aichi-ken, JP;
Tadashi Yamada, Aichi-ken, JP;
Hiroshi Murata, Aichi-ken, JP;
Nobuyoshi Uematsu, Aichi-ken, JP;
Takashi Ushio, Aichi-ken, JP;
Kabushiki Kaisha Toyota Jidoshokki, Aichi, JP;
Abstract
An industrial vehicle having a vehicle body includes a battery, an electric motor, an electrolyte level sensor, a vehicle operating with lowered electrolyte level, a vehicle operating time calculator, a data-storing device storing data of the vehicle operating time, an electric motor limiting condition and a motor controller. The electric motor is driven to generate torque. The electrolyte level sensor detects whether or not electrolyte level of the battery is lower than a predetermined level. The vehicle operating time is a time elapsing while the electrolyte level is lower than the predetermined level. The vehicle operating time calculator counts the vehicle operating time in accordance with the detection of the electrolyte level. The electric motor limiting condition limits operation of the electric motor gradually in accordance with the vehicle operating time. The motor controller controls operation of the electric motor based on the electric motor limiting condition.