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Electromagnetic Valve

A solenoid valve and magnetic yoke technology, which is applied in the field of solenoid valves and can solve problems such as the reduction of magnetic attraction

Active Publication Date: 2015-05-20
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the magnetic attraction generated when the coil 107 is energized may be reduced

Method used

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  • Electromagnetic Valve
  • Electromagnetic Valve
  • Electromagnetic Valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The following will refer to Figures 1 to 3 A solenoid valve according to an exemplary embodiment of the present invention is described. The solenoid valve of the present embodiment is used as a pressure reducing valve 1 for reducing the pressure in a common rail in which fuel is accumulated at high pressure.

[0022] The pressure reducing valve 1 includes a housing 2 , a rod 3 sliding in the axial direction inside the housing, a valve body (not shown) arranged in front of the rod 3 , and a driving portion that drives the rod 3 . As indicated by the double-headed arrows in the drawings, the lower side in each drawing is referred to as one side in the axial direction, and the upper side in each drawing is referred to as the other side in the axial direction.

[0023] The driving part drives the valve body through the rod 3 , and the driving part includes a spring 7 and an electromagnetic actuator 8 . The electromagnetic actuator 8 includes a cylindrical coil 9, a stato...

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PUM

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Abstract

An electromagnetic valve includes a coil that generates a magnetic force, a stator core arranged radially inward of the coil, an armature moved toward the stator core in an axial direction of the coil by the magnetic force, a yoke arranged on radially outward of the coil, a housing axially contacting the yoke and including a slide hole supporting the armature slidably, and a ring-shaped magnetic plate. The ring-shaped magnetic plate faces to the armature on a radially inner side of the magnetic plate, and faces to the yoke via a clearance on a radially outer side of the magnetic plate. The magnetic plate radially contacts the housing on the one side in the axial direction with reference to a position where the yoke contacts the housing, and on a radially outer side of an inner surface of the slide hole.

Description

technical field [0001] The present invention relates to a solenoid valve comprising an armature movable by magnetic attraction. Background technique [0002] Usually, a solenoid valve is used as a pressure reducing valve, which will be stored in such as Figure 4A and 4B High-pressure fuel in the shown common rail is discharged and decompressed (eg, Patent Document 1: JP2011-202770A). Figure 4A and 4B The illustrated solenoid valve 100 includes a housing 101 , a rod 102 slidably supported in the housing 101 in the axial direction of the rod 102 , and an electromagnetic actuator 105 that actuates the rod 102 . The valve body is arranged at the front end of the rod 102 , and moves according to the movement of the rod 102 to open or close a valve hole arranged in the casing 101 . [0003] The electromagnetic actuator 105 includes a cylindrical coil 107 that generates a magnetic field when it is energized, a stator core 108 disposed radially inside the coil 107, a yoke 109, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/06
CPCH01F7/081H01F7/13
Inventor 三俣直树野野山林
Owner DENSO CORP