Title:
油圧システム
Document Type and Number:
Japanese Patent JP6815267
Kind Code:
B2
Abstract:
A hydraulic system equipped with: an electromagnetic proportional valve connected to a regulator via a secondary pressure line and connected to an auxiliary pump via a primary pressure line; an emergency line that branches from the primary pressure line and connects to a tank, and that is provided with a pair of throttle mechanisms; a switching valve that is provided so as to divide the secondary pressure line into a first flow path and a second flow path and to divide the emergency line into an upstream flow path and a downstream flow path between the pair of throttle mechanisms, and that switches from a neutral position to an operation position when the secondary pressure in the electromagnetic proportional valve exceeds a set value; and a control device that transmits a command current to the electromagnetic proportional valve in response to an operation signal output from an operation device such that the electromagnetic proportional valve outputs a secondary pressure that is between a minimum value, greater than the set value, and a maximum value.
Inventors:
Tetsuhiro Kondo
Ryuji Sakai
Ryuji Sakai
Application Number:
JP2017081847A
Publication Date:
January 20, 2021
Filing Date:
April 18, 2017
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
F15B20/00
Domestic Patent References:
| JP2005265062A | ||||
| JP2013185401A |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office