Title:
LINEAR SOLENOID VALVE
Document Type and Number:
WIPO Patent Application WO/2018/012357
Kind Code:
A1
Abstract:
A linear solenoid valve (1) has a spool (11) that strokes one way in the direction of the axis X due to the conduction of current to a coil (12), a spring (13) that urges the spool (11) the other way in the direction of the axis X, a control device (20) for controlling the conduction of current to the coil (12), a determination unit (201) for determining the start of an operation to remove foreign substances from the spool (11), a command value setting unit (202) for setting a command value (It) for current conducted to the coil (12), and a dither current setting unit (203) for setting a dither current (Id) superimposed over the command value (It). When the determination unit (201) determines the start of the operation to remove foreign substances, the dither current setting unit (203) changes the oscillation frequency (F) of the dither current (Id) to an oscillation frequency lower than the frequency at the current point in time, and the command value setting unit (202) periodically increases and reduces the command value (It) over which the changed oscillation frequency (F) is superimposed.
Inventors:
ISHII HIDEKI (JP)
ISHIMORI YOSHINORI (JP)
HIROSE YUTAKA (JP)
ISHIMORI YOSHINORI (JP)
HIROSE YUTAKA (JP)
Application Number:
PCT/JP2017/024591
Publication Date:
January 18, 2018
Filing Date:
July 05, 2017
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
F16K31/06; F16H61/02; H01F7/18
Foreign References:
| JP2005054970A | 2005-03-03 | |||
| JP2000170950A | 2000-06-23 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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