Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
WORK VEHICLE POWER REGENERATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/163112
Kind Code:
A1
Abstract:
Provided is a work vehicle power regeneration system capable of effectively using regenerated electric energy. The work vehicle power regeneration system is provided with: a first electric circuit (C1) for supplying power generated by a first generator (12) to travel motors (10L, 10R); a voltage detector (55) for detecting an actual voltage of the first electric circuit; a second electric circuit (C2) for supplying power generated by a second generator (13) to an auxiliary device (19); a step-down device (60) having a high voltage side connected to the first electric circuit and a low voltage side connected to the second electric circuit; and a controller (49) for controlling the drive of the step-down device. The controller estimates, on the basis of information about the travel state of a work vehicle and the actual voltage detected by the voltage detector, the voltage of the first electric circuit after the elapse of a predetermined time from the present time point, and outputs a drive command to the step-down device if the voltage estimated by a voltage estimation unit is greater than or equal to a threshold value.

Inventors:
FUKUDA Naoki (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
ARAI Masatsugu (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
SHIMIZU Yukiaki (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
TANAKA Takaaki (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
TANAKA Shintarou (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
Application Number:
JP2018/006828
Publication Date:
August 29, 2019
Filing Date:
February 23, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (16-1, Higashiueno 2-chome Taito-k, Tokyo 15, 〒1100015, JP)
International Classes:
B60L7/14
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (UNIZO Nishishimbashi 3-chome Bldg, 13-3 Nishishimbashi 3-chome, Minato-k, Tokyo 03, 〒1050003, JP)
Download PDF: