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fuel injection valve

A fuel injection valve and fuel technology, which is applied in fuel injection devices, charging systems, machines/engines, etc., can solve problems such as the deterioration of atomization, achieve stress suppression, compact overall structure, and suppress the deterioration of atomization

Active Publication Date: 2019-05-14
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the distance between the injection holes is to be reduced to make the overall structure of the fuel passage compact, there is a problem that uniform and thick fuel liquid films interfere with each other, deteriorating atomization.

Method used

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Experimental program
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Embodiment approach 1

[0064]Hereinafter, the fuel injection valve according to Embodiment 1 of the present invention will be described based on the drawings. figure 1 is a cross-sectional view showing the fuel injection valve according to Embodiment 1, figure 2 is a partially enlarged cross-sectional view showing the tip portion of the fuel injection valve according to Embodiment 1, image 3 is viewed from the upstream side figure 2 The top view of the part indicated by A-A in . In addition, in each figure, the same code|symbol is attached|subjected to the same, corresponding part in a figure.

[0065] The fuel injection valve 1 includes: a solenoid device 2 that generates electromagnetic force; and a valve device 3 that operates by energizing the solenoid device 2 . The solenoid device 2 includes: a casing 21, which forms a yoke portion of a magnetic circuit; an iron core 22, which is a fixed iron core disposed inside the casing 21; a coil 23, which surrounds and an armature 24 which is a mo...

Embodiment approach 2

[0095] In this embodiment 2, use Figure 8 ~ Figure 10 , a modified example of the structure for causing a difference in the ratio of the fuel flowing into the injection hole 36 from the two swirling passages 42 will be described. In addition, since the overall structure of the fuel injection valve of the second embodiment is the same as that of the first embodiment, the figure 1 , and omit the description of each part.

[0096] exist Figure 8 In the illustrated example, the communication direction of the central axis side swirling passage 42a toward the swirling chamber 41 is more inclined to the nozzle hole center 36a than the communication direction of the outer peripheral side swirling passage 42b toward the swirling chamber 41 . Thereby, the fuel flow (arrow 5a in the figure) that flows into the swirl chamber 41 from the center axis side swirl passage 42a is the same as the fuel flow (arrow 5b in the figure) that flows into the swirl chamber 41 from the outer periphera...

Embodiment approach 3

[0103] Figure 11 The structure and fuel flow of the tip portion of the fuel injection valve according to Embodiment 3 of the present invention are shown. The fuel injection valve 1 according to Embodiment 3 includes injection holes 36A inclined with respect to the plate thickness direction of the injection hole plate 35 so that the thickness in the circumferential direction of the hollow conical fuel liquid film 51 injected from the injection hole outlet 36b does not change. Uniform means. In addition, since the overall structure of the fuel injection valve according to the third embodiment is the same as that of the above-mentioned first embodiment, the figure 1 , and omit the description of each part.

[0104] Figure 12 is viewed from the arrow side Figure 11 Sectional view of the part indicated by D-D in . Such as Figure 12 As shown, the injection hole 36A of the fuel injection valve according to Embodiment 3 is inclined toward the valve seat center axis Z side fr...

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Abstract

A fuel injection value, which has a compact entire structure and small dead volume in a fuel channel that applies revolving force to fuel, can achieve micronization of fuel spray, and has good pressure resistance. Orifices (36) in an orifice plate (35) as a front end of the fuel injection value, the revolving chamber (41) and a revolving channel (42) are configured to enable fuel spraies, which are sprayed from two adjacent orifices (36), are subjected to interference at a position which is more closed to the upstream side than a position that the fuel spray is splitted from fuel liquid film (51) into fuel liquid line (52). Since the circumferential thickness of the fuel liquid film (51) in a hollow conical shape is uneven, and the inteference is formed away from the most thick part (51a), the fuel injection value can inhibit deterioration of micronization of interference of the fuel liquid film. In addition, distance between the adjacent orifices (36) is reduced, and the entire compactness of the fuel channel is achieved and the dead volume is reduced, thus improving the micronization of the fuel spray in initial stage of injection.

Description

technical field [0001] The present invention relates to a fuel injection valve for supplying fuel to an internal combustion engine of an automobile, and more particularly, to a fuel injection valve that realizes acceleration of atomization in spray characteristics. Background technique [0002] In recent years, regulations on exhaust gas from internal combustion engines of automobiles have become stricter, and atomization of fuel spray injected from fuel injection valves has been required. As a prior art for achieving atomization of fuel spray, there has been proposed a technique for achieving atomization by applying a swirling force to fuel to form a swirling flow. [0003] For example, Patent Document 1 proposes a fuel injection valve in which a swirl imparting chamber is provided on an orifice plate, and the swirl imparting chamber is connected to an opening on the downstream side of the valve seat through a communication passage. connected. The swirl application chambe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06F02M61/16F02M61/18
CPCF02M51/0625F02M61/16F02M61/18F02M61/184F02M61/1893
Inventor 伊藤启祐川崎翔太宗实毅茶园史也
Owner MITSUBISHI ELECTRIC CORP
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