Title:
The oil pressure driver system of construction machinery
Document Type and Number:
Japanese Patent JP6270704
Kind Code:
B2
Abstract:
A pump that supplies hydraulic oil to a boom cylinder and a turning hydraulic motor; a regenerative hydraulic motor is coupled to the pump and to which the hydraulic oil discharged from the boom cylinder at a time of boom lowering and/or the hydraulic oil discharged from the turning hydraulic motor at a time of turning deceleration is/are led; an engine drives the pump; an alternator mounted to the engine and operable to rotate an output shaft of the engine when electric power is supplied to the alternator; an electrical storage device connected to the alternator; a power converter interposed between the alternator and the electrical storage device; and a controller that switches the power converter to either a servo-on state or a servo-off state and that controls the power converter either in a charging mode or in a discharging mode when switching the power converter to the servo-on state.
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Inventors:
Tetsuhiro Kondo
Yoji Yuji
Takehisa Kato
Yoji Yuji
Takehisa Kato
Application Number:
JP2014249816A
Publication Date:
January 31, 2018
Filing Date:
December 10, 2014
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
F15B21/14; E02F9/20
Domestic Patent References:
| JP2012193551A | ||||
| JP2011202458A | ||||
| JP2001197785A |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office
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