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Fluid injection valve

A fluid injection and housing technology, which can be applied to fuel injection devices, special fuel injection devices, fuel injection devices with noise reduction measures, etc., and can solve problems such as noise reduction

Inactive Publication Date: 2006-09-13
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sound vibration propagating over the entire length of the fuel passage 302 is diffracted to the outer peripheral side of the fuel filter 310, and passes through the fuel filter 310 to propagate to the outside of the fuel injection valve 300, so it is impossible to reduce the noise.

Method used

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  • Fluid injection valve
  • Fluid injection valve
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Examples

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no. 1 example

[0015] figure 1 A fuel injection valve (fluid injection valve) according to a first embodiment of the present invention is shown. The fuel injection valve 10 according to the first embodiment is installed, for example, in an intake pipe connected to a combustion chamber of a gasoline engine, and injects fuel into intake air flowing through an intake passage formed by the intake pipe. The fuel injection valve 10 can also be applied to a direct-injection gasoline engine that directly injects fuel into a combustion chamber of a gasoline engine, or to a diesel engine.

[0016] The pipe member 12 of the fuel injection valve 10 has a first magnetic pipe 14, a nonmagnetic pipe 15, and a second magnetic pipe 16 arranged in order from the side of the injection orifice plate forming the injection hole 20a. The first magnetic pipe 14 is connected to the non-magnetic pipe 15, and the non-magnetic pipe 15 is connected to the second magnetic pipe 16 by welding or the like. A valve body 22...

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PUM

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Abstract

In a fluid injection valve, a fuel filter is installed in an upstream portion of the housing. A valve element is slidably installed in the housing to lift off and seat on a valve seat provided at a downstream portion of the housing. A passage portion is provided in the housing between the fuel filter and the valve element to face the fuel filter and has an opening portion at an upstream end thereof. An inner width of the opening portion is narrower than a bore of the upstream portion of the housing. A distance between the opening portion and the fuel filter is 4.5 mm or greater.

Description

technical field [0001] The present invention relates to a fluid injection valve suitable for injecting fuel into a cylinder of an internal combustion engine (hereinafter simply referred to as engine). Background technique [0002] For example, US Patent No. 4984744 and its equivalent JP-H02-195084 disclose a fuel injection valve in which an electromagnetic drive portion reciprocates a valve element to start and stop fuel injection. In such fuel injection valves, for example, when the valve element seats against the valve seat during the valve closing time, or when the valve element or movable core engages the stopper during the valve opening time, there will be a rattling sound . Therefore, if the operation sound generated inside the fuel injection valve propagates to the outside of the fuel injection valve, the fuel injection valve will cause a noise problem. [0003] On this issue, in another fuel injection valve 300 shown in FIG. inside the fuel injection valve 300). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M51/00
CPCF02M2200/09F02M2200/315F02M51/0682F02M61/165F02M2200/8084F02M2200/505
Inventor 山本辰介
Owner DENSO CORP