Title:
HYBRID-TYPE CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/118027
Kind Code:
A1
Abstract:
Provided is a hybrid-type construction machine capable of executing revolving operation with the same sense of operation as that of conventional construction machines, with an electrical storage device whose electrical storage quantity can be controlled to be within an appropriate range in view of operational life without increasing the capacity of the electrical storage device. The hybrid-type construction machine is provided with: an electric motor and a hydraulic motor for driving a revolving superstructure; an electrical storage device; and a controller for controlling charging and discharging of the electrical storage device. The controller includes: a memory unit storing, with regard to the electrical storage quantity of the electrical storage device, a discharge command region that is set in accordance with the revolving speed of the revolving superstructure; and a computing unit for computing an additional drive torque command value for the electric motor for increasing the powering amount of the electric motor in accordance with the electrical storage quantity of the electrical storage device when the electrical storage quantity of the electrical storage device has reached the discharge command region stored in the memory unit, and for outputting the additional drive torque command value to the electric motor in order to drive the revolving superstructure.
Inventors:
IZUMI SHIHO (JP)
EDAMURA MANABU (JP)
SHIBATA KOUICHI (JP)
SUGIURA MANABU (JP)
OOKI TAKATOSHI (JP)
EDAMURA MANABU (JP)
SHIBATA KOUICHI (JP)
SUGIURA MANABU (JP)
OOKI TAKATOSHI (JP)
Application Number:
PCT/JP2012/054814
Publication Date:
September 07, 2012
Filing Date:
February 27, 2012
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
IZUMI SHIHO (JP)
EDAMURA MANABU (JP)
SHIBATA KOUICHI (JP)
SUGIURA MANABU (JP)
OOKI TAKATOSHI (JP)
IZUMI SHIHO (JP)
EDAMURA MANABU (JP)
SHIBATA KOUICHI (JP)
SUGIURA MANABU (JP)
OOKI TAKATOSHI (JP)
International Classes:
E02F9/20; E02F9/22; H02P27/06
Foreign References:
| JP2011036111A | 2011-02-17 | |||
| JP2005237178A | 2005-09-02 | |||
| JP2008063888A | 2008-03-21 |
Other References:
See also references of EP 2682532A4
Attorney, Agent or Firm:
KASUGA Yuzuru (JP)
Kasuga 讓 (JP)
Kasuga 讓 (JP)
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Claims: