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Patent Searching and Data


Title:
CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2017/199546
Kind Code:
A1
Abstract:
Upon detecting a non-operation by an operation device (14), a low idling controller (26A) switches an idling state flag from "clear" to "set". A rotation speed controller (26B) switches, on the basis of the idling state flag, a rotational speed command from a set rotation speed set by a rotation speed command device (27) to a low idling rotation speed. An engine (8) then rotates at a low idling rotation speed, which is lower than the set rotation speed. While the low idling controller (26A) is reducing the rotation speed of the engine (8), a gate control unit (24) stops the switching of an inverter (23).

Inventors:
ISHIJIMA Makoto (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
ISHIDA Seiji (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
TANIGAKI Kenta (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
Application Number:
JP2017/009171
Publication Date:
November 23, 2017
Filing Date:
March 08, 2017
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (16-1, Higashiueno 2-chome Taito-k, Tokyo 15, 〒1100015, JP)
International Classes:
E02F9/20; F02D29/00
Attorney, Agent or Firm:
HIROWA PATENT FIRM (4F. Nishishinjuku Koide Bldg, 1-3 Nishishinjuku 3-chome, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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