Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2018/168179
Kind Code:
A1
Abstract:
Provided is a 2-engine construction machine capable of allowing a hydraulic closed circuit system to be more easily and efficiently mounted in the 2-engine construction machine, and achieving high energy saving performance. The hydraulic closed circuit system is further provided with a second engine (9b), at least four units of closed circuit pumps (12a, 12b, 14a, 14b, 16a, 16b, 18a, 18b) comprise closed circuit pumps (12a, 14a, 16a, 18a) driven by a first engine (9a) and closed circuit pumps (12b, 14b, 16b, 18b) driven by the second engine (9b), and the at least four units of closed circuit pumps have a connection structure in which, when a plurality of solenoid valves (43, 45, 47, 49) are selectively switched to a communication position, every two pumps merge oil discharged from one of two discharge ports on an upstream side of the plurality of solenoid valves, with the merged pressure oil being fed to the plurality of solenoid valves.
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| JP2009293631 | HYDRAULIC SYSTEM FOR WORKING MACHINE |
Inventors:
HIRAKU KENJI (JP)
KUSAMA TAKASHI (JP)
AIHARA MITSUO (JP)
TAKAHASHI HIROMASA (JP)
SHIMIZU JURI (JP)
KUSAMA TAKASHI (JP)
AIHARA MITSUO (JP)
TAKAHASHI HIROMASA (JP)
SHIMIZU JURI (JP)
Application Number:
PCT/JP2018/001069
Publication Date:
September 20, 2018
Filing Date:
January 16, 2018
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F15B11/02; E02F9/22; F15B11/08; F15B11/17
Foreign References:
| JPS51101682A | 1976-09-08 | |||
| JP2014045665A | 2014-03-17 | |||
| JPH11124879A | 1999-05-11 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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