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fuel injection valve

A fuel injection valve and fuel injection technology, which are applied to fuel injection devices, charging systems, engine components, etc. to achieve the effects of atomization and conflict suppression

Active Publication Date: 2015-08-19
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the fuel spray injected from adjacent fuel injection holes collides, the liquid particles combine with each other to form coarse particles, which may inhibit the atomization of the fuel.

Method used

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Embodiment 1

[0034] The fuel injection valve 1 of the first embodiment will be described.

[0035] [Structure of Fuel Injection Valve]

[0036] figure 1 is an axial sectional view of the fuel injection valve 1 . This fuel injection valve 1 is used in an automobile engine and the like.

[0037] The fuel injection valve 1 has: a magnetic cylinder body 2, a core cylinder body 3 accommodated in the magnetic cylinder body 2, a valve body 4 slidable in the axial direction, a valve shaft 5 integrally formed with the valve body 4, and a valve shaft through which the valve is closed. The valve seat part 7 of the valve seat 6 that is closed by the valve body 4, the nozzle plate 8 with the injection hole that injects fuel when the valve is opened, the electromagnetic coil 9 that makes the valve body 4 slide in the valve opening direction when the valve is energized, and the yoke 10 that induces magnetic flux .

[0038] The magnetic cylinder 2 is made of, for example, a metal pipe formed of a magn...

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Abstract

PROBLEM TO BE SOLVED: To provide a fuel injection valve which controls the collision of injected fuel and atomizes the fuel. SOLUTION: A nozzle plate 8 is formed with two large diameter fuel injection holes 44a and two small diameter fuel injection holes 44b. The center of the fuel injection holes 44a and the center of a swirl applying chamber 411a are formed to be substantially matched with the center of the fuel injection hole 44b and the center of a swirl applying chamber 411b, and the fuel injection holes are so formed as to be positioned away from the other adjacent fuel injection holes as much as possible. The large diameter fuel injection holes 44a are formed at positions away from the center of the nozzle plate 8 further than the small diameter fuel injection hole 44b, to be configured to prevent the collision of the fuel injected from each fuel injection hole. COPYRIGHT: (C)2012,JPO&INPIT

Description

technical field [0001] The present invention relates to a fuel injection valve used as a fuel injection valve for an engine. Background technique [0002] As such a technique, the technique described in the following patent document 1 is disclosed. This gazette discloses a fuel injection valve that atomizes fuel by imparting swirl to fuel injected from each fuel injection hole. The fuel immediately after being injected from each fuel injection hole is in a liquid film state, but then passes through a liquid filament state and becomes an atomized state. In this fuel injection valve, by colliding fuel sprays injected from adjacent fuel injection holes, the liquid film state is changed to a liquid filament state at an early stage, and as a result, atomization of fuel is promoted. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2003-336561 [0004] However, when the fuel sprays injected from the adjacent fuel injection holes collide, the liquid particles are combine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06F02M61/18
Inventor 斋藤贵博小林信章大野洋史中井敦士
Owner HITACHI ASTEMO LTD
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