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Magnet assembly and fuel injector comprising a magnet assembly

A technology of magnetic components and magnetic cores, which is applied in the direction of fuel injection devices, magnets, electromagnets, etc., can solve the problems of the processing cost of the magnetic armature, and achieve the effect of uniform bending stress

Active Publication Date: 2018-03-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage here, however, is the additional machining effort of the armature in the region of the end face facing the magnetic core.

Method used

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  • Magnet assembly and fuel injector comprising a magnet assembly

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0016] The single figure shows a subarea of ​​a fuel injector 100 which is used as part of a so-called common rail injection system for injecting fuel into a combustion chamber, in particular of a self-igniting internal combustion engine.

[0017] The fuel injector 100 has an injector housing 1 in which a magnetic assembly 10 is arranged or accommodated. The magnetic assembly 10 comprises a substantially cylindrical magnetic core 11 which has a radially surrounding annular receiving chamber 13 on an end side 12 for receiving a magnetic coil 15 .

[0018] Furthermore, the magnetic core 11 has a through-opening 17 configured coaxially to the longitudinal axis 16 . The other end side 18 of the magnetic core 11 , which is opposite the end side 12 , is supported axially on the bottom of the holding plate 20 via disk springs 19 .

[0019] The magnetic core 11 is surrounded radially by a magnetic sleeve 25 , which can be fastened axially in the direction of the component 20 by means...

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PUM

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Abstract

The invention relates to a magnet assembly (10), comprising a magnet core (11) and a magnet sleeve (25) accommodating same, and comprising a magnet armature (35) which cooperates with the magnet core(11), is arranged in a longitudinally moveable manner along a longitudinal axis (16) of the magnet sleeve (25), and which is arranged in an end position, forming a residual air gap (32) at a front face (33) of the magnet core (11) lying opposite the magnet armature (35). According to the invention, the magnet sleeve (25) has a retaining section (28) protruding radially in the direction toward theaxis (16) for axially fixing the magnet core (11) with a spacer section (30) arranged overlapping radially with the magnet armature (35) in order to set the residual air gap (32).

Description

technical field [0001] The invention relates to a magnetic assembly according to the preamble of claim 1 . Furthermore, the invention relates to a fuel injector using the magnetic assembly according to the invention. Background technique [0002] A magnetic assembly according to the preamble of claim 1 is known from DE 10 2009 001 706 A1 by the applicant. The known magnetic assembly has a magnetic core with electromagnetic coils embedded in said magnetic core, wherein the magnetic core is radially surrounded by a magnetic sleeve for axially enclosing the magnetic core. Positioned or secured inside the injector housing. For this purpose, the magnetic sleeve has a radially inwardly protruding holding section in the form of a holding flange, which bears against the end face of the magnetic core with the interposed residual air-gap disk. In the axial end position of the armature, which is arranged longitudinally displaceable inside the injector, the residual air-gap disk inte...

Claims

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Application Information

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IPC IPC(8): F16K31/06F16K27/04F16K27/02F02M51/06H01F7/16
CPCF02M51/0625F16K27/029F16K27/048F16K31/0675H01F7/081H01F7/1638
Inventor M·克劳泽H·克劳斯K·施泰因贝格O·蒂克尔
Owner ROBERT BOSCH GMBH