Title:
CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2016/117063
Kind Code:
A1
Abstract:
This control valve is provided with: a housing having therein a high pressure passage that is in communication with a hydraulic pressure supply source, a low pressure passage that is in communication with a tank, at least one port that is in communication with an actuator, and a spool hole that is in communication with said high pressure passage, low pressure passage and port; a spool valve body that is equipped with a detected element for detecting position and assumes, by moving back and forth inside the spool hole of the housing, a configuration in which the port and the high pressure passage are in communication, a configuration in which the port and the low pressure passage are in communication, or a configuration in which said port is closed from the high pressure passage and the low pressure passage; a coil inside which the detected element of the spool valve body is inserted and the internal magnetic flux of which changes with movement of the spool valve body; a signal-processing unit for detecting the induced reactance of said coil; and a calculating unit for determining the amount of displacement of the spool valve body corresponding to the induced reactance detected by the signal-processing unit.
Inventors:
IIZUMI HITOMI (JP)
Application Number:
PCT/JP2015/051610
Publication Date:
July 28, 2016
Filing Date:
January 22, 2015
Export Citation:
Assignee:
SHIMADZU CORP (JP)
International Classes:
F16K37/00; F16K11/07
Domestic Patent References:
| WO2009017196A1 | 2009-02-05 |
Foreign References:
| JP2001027359A | 2001-01-30 | |||
| JP2008145396A | 2008-06-26 |
Attorney, Agent or Firm:
AKAZAWA, Kazuhiro (JP)
Kazuhiro Akazawa (JP)
Kazuhiro Akazawa (JP)
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