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Patent Searching and Data


Title:
HYBRID CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2015/114908
Kind Code:
A1
Abstract:
The purpose of the present invention is to operate an engine in a proper operating state while keeping the remaining energy in an electricity storage device within a proper range. A hybrid construction machine according to the present invention is provided with a controller for controlling an engine in accordance with a governor characteristic having a slope that defines a relationship between load torque and rotating speed so that the rotating speed decreases with an increase in the load torque. In the controller, a target engine power calculator (2-5) calculates a first target engine power that increases and decreases with increases and decreases in output values of a load power calculator (2-1) and a charge-discharge request calculator (2-3), and a target rotating speed calculator (2-6) calculates, as a command value for a target rotating speed for a motor-generator, a rotating speed at the intersection between a governor characteristic line changed by a governor characteristic changer (2-4) and an equal power line dependent on the first target engine power on a rotating speed-torque characteristic line diagram.

Inventors:
ISHIHARA Shinji (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
HOSHINO Masatoshi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2014/080108
Publication Date:
August 06, 2015
Filing Date:
November 13, 2014
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (5-1 Koraku 2-chome, Bunkyo-ku Tokyo, 63, 〒1128563, JP)
International Classes:
B60W10/08; B60K6/485; B60L11/02; B60L11/18; B60W10/06; B60W20/00; E02F9/20; F02D29/00; F02D29/04; F02D29/06
Foreign References:
JP2003027985A2003-01-29
JP2005210874A2005-08-04
JP2007269207A2007-10-18
JP4725406B22011-07-13
US20070187180A12007-08-16
Other References:
See also references of EP 3103693A4
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (Nishishimbashi Bldg, 13-3 Nishishimbashi 3-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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