Title:
HYDRAULIC SYSTEM
Document Type and Number:
Japanese Patent JP2018168977
Kind Code:
A
Abstract:
To provide a hydraulic system including a first pump and a second pump in variable capacity type, capable of corresponding to failures or the like of an electromagnetic proportional valve at a low-cost configuration.SOLUTION: A hydraulic system includes: a first and a second electromagnetic proportional valves for outputting higher secondary pressure as operation signals output from a first and a second operation devices increase; a third electromagnetic proportional valve for outputting higher secondary pressure as an amount of operation on the first operating device increases if the first electromagnetic proportional valve does not operate correctly, and outputting higher secondary pressure as an amount of operation on the second operating device increases if the second electromagnetic proportional valve does not operate correctly; a first high pressure selection valve for selecting a higher pressure from the secondary pressure output from the first electromagnetic proportional valve and the secondary pressure output from the third electromagnetic proportional valve, then leading the higher pressure to a first regulator for a first pump; and a second high pressure selection valve for selecting a higher pressure from the secondary pressure output from the second electromagnetic proportional valve and the secondary pressure output from the third electromagnetic proportional valve, then leading the higher pressure to a second regulator for a second pump.SELECTED DRAWING: Figure 1
Inventors:
KONDO TETSUHIRO
Application Number:
JP2017067527A
Publication Date:
November 01, 2018
Filing Date:
March 30, 2017
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD
International Classes:
F15B20/00; F15B11/02; F15B11/08; F15B11/17
Domestic Patent References:
| JP2013185401A | 2013-09-19 | |||
| JP2005265062A | 2005-09-29 | |||
| JP2016114129A | 2016-06-23 | |||
| JP2011256814A | 2011-12-22 | |||
| JP2010048396A | 2010-03-04 | |||
| JP2004076910A | 2004-03-11 | |||
| JP2000282515A | 2000-10-10 |
Foreign References:
| WO2016136229A1 | 2016-09-01 |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office