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Solenoid fuel injection valve

A fuel injection valve, electromagnetic technology, applied in the direction of fuel injection devices, charging systems, engine components, etc., can solve the problems of reduced commerciality, reduced connectivity between power supply couplers and power receiver couplers, etc., to improve Effects of Connectivity and Commodity

Active Publication Date: 2007-08-29
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the power receiving coupler is formed by two-layer molding of such a synthetic resin, since the second resin molding layer shrinks due to cooling after molding, the outer end of the second resin molding layer and the first resin Gaps or protrusions are generated on the molding layer, which reduces the connectivity between the power supply coupler and the power reception coupler, resulting in a decrease in marketability

Method used

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  • Solenoid fuel injection valve
  • Solenoid fuel injection valve
  • Solenoid fuel injection valve

Examples

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Embodiment 1

[0042] A first embodiment of the present invention will be described with reference to FIGS. 1 to 4 . First, in FIG. 1 , an electromagnetic fuel injection valve for injecting fuel into an engine (not shown) includes a valve actuating portion 5 having a valve at its tip. The valve housing 9 of the seat 8 accommodates a valve body 10, and the valve body 10 is elastically urged in the direction of being seated on the valve seat 8; A coil assembly 11 for driving the electromagnetic force of the valve body 10 on one side is accommodated in a solenoid case 12 provided continuously with the valve case 9; a resin molding part 7 made of synthetic resin integrally has a receiving The power-receiving coupler 40 covers at least the solenoid portion 6 , and the power-receiving coupler 40 faces the power-receiving-side connection terminals 38 . . . connected to the coil 29 of the coil assembly 11 .

[0043] Referring also to FIG. 2 , the valve housing 9 is composed of a magnetic cylindrical...

Embodiment 2

[0068] FIG. 5 shows the second embodiment of the present invention. The engaging portion provided on the outer periphery of the first resin molding layer 41 in the portion corresponding to the coil assembly 11 along the axial direction of the valve housing 5 may be a circular engaging recessed portion. 48. By restricting the displacement of the second resin molded layer 42 to the rear side by the engaging recessed portion 48, the same effects as those of the above-described first embodiment can be exhibited.

Embodiment 3

[0070] FIG. 6 shows the third embodiment of the present invention, and the engaging portion provided on the outer periphery of the first resin molding layer 41 in the portion corresponding to the coil assembly 11 along the axial direction of the valve housing 5 may be a forward-facing loop. The engagement step portion 49 can also exhibit the same effects as those of the first and second embodiments described above by restricting the rearward displacement of the second resin molded layer 42 by the engagement step portion 49 .

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Abstract

In an electromagnetic fuel injection valve in which a first resin-molded layer that is made of a synthetic resin, covers a solenoid section, and forms a coupler main portion that defines a framework of a power-receiving coupler is covered by a second resin-molded layer made of a synthetic resin that is different from that of the first resin-molded layer so that an outer face of the coupler main portion is exposed from a middle part up to the extremity of the coupler main portion, an endless engagement groove (45) is provided on the outer periphery of the middle part of the coupler main portion (40a) of the first resin-molded layer (41), the second resin-molded layer (42) engaging with the endless engagement groove (45), and an extending portion (42b) extending further outward than the engagement groove (45) is formed in the second resin-molded layer (42) so that the extending portion (42b) makes contact with an outer face of the coupler main portion (40a) when in a non-engaged state and covers the coupler main portion (40a). This prevents a gap or a bulge from occurring in a boundary section between the two resin-molded layers, thus improving the connectivity of a power-supplying coupler to a power-receiving coupler and the merchantability.

Description

technical field [0001] The present invention relates to an electromagnetic fuel injection valve having a valve actuating portion in which a valve body is accommodated in a valve housing having a valve seat at a front end portion, and the valve body is oriented in a direction to be seated on the valve seat Elastic force; the solenoid part, in which the coil assembly that can generate the electromagnetic force to drive the valve body to the side away from the valve seat, is accommodated in a continuous and rearward extension of the valve housing. the inside of the solenoid housing; and a resin molded portion formed by covering a first resin molded layer made of synthetic resin with a second resin molded layer that covers the solenoid portion and is formed for A main part of a coupler constituting a frame of a power-receiving coupler that faces a power-receiving side connecting terminal connected to the coil of the coil assembly, the second resin molding layer is formed by using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M51/06F02M51/02
Inventor 赤羽根明田沼洋和
Owner HITACHI ASTEMO LTD
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