Title:
DAMPING CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JP2018185015
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To simplify a configuration of a damping control circuit for work vehicle.SOLUTION: In a damping control OFF state, a signal pressure supply control valve stops supply of a first signal pressure, a pressure regulation valve is located at a first position connecting a supply/discharge port to a pump port, an opening/closing signal pressure is not supplied to an opening/closing control valve, and an opening/closing valve is closed. When the damping control OFF state is switched from a damping control ON state, the signal pressure supply control valve permits the supply of the first signal pressure, the pressure regulation valve is located at a second position connecting the supply/discharge port to a tank port, and a pressure of a pressure accumulator is reduced. When the pressure of the pressure accumulator becomes equal to a pressure of a pressure chamber in the damping control ON state, the pressure regulation valve is located at a third position cutting off the supply/discharge port, the opening/closing signal pressure is supplied to the opening/closing control valve, and the opening/closing valve is opened.SELECTED DRAWING: Figure 2
Inventors:
ITO MAKOTO
SAKAMOTO SHUNICHI
OKAZAKI TAKAHIRO
SAKAMOTO SHUNICHI
OKAZAKI TAKAHIRO
Application Number:
JP2017087842A
Publication Date:
November 22, 2018
Filing Date:
April 27, 2017
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD
International Classes:
F15B11/02; E02F9/22; F16F15/02
Attorney, Agent or Firm:
Patent business corporation Yuko patent office