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fluid ejection device

A fluid injection and nozzle technology, applied in fuel injection devices, low-pressure fuel injection, fuel injection devices with piezoelectric elements or magnetostrictive elements, etc., can solve the advantages of valve element opening disorder, fuel flow difficult to control, and resonance Loss and other problems, to achieve the effect of easy assembly

Inactive Publication Date: 2012-02-08
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the shock persists, the lift of the head becomes chaotic, the benefit of resonance is lost, and the opening of the valve element becomes chaotic, which can make fuel flow difficult to control

Method used

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Embodiment Construction

[0032] figure 1 , 3 The injection device or injector of (or 2, 4) is designed to inject fluid such as fuel C into the combustion chamber 15 of the internal combustion engine M or into an intake duct not shown.

[0033]The injector comprises two bodies, for example cylindrical. A first body 1 representing the housing extends on a preferred axis AB of the spray device, for example its axis of symmetry, through at least one nozzle 3 having a length on this axis AB and comprising a spray hole and a seat 5 ( or 5'). The linear dimensions of the first body 1 , such as its width measured perpendicular to the axis AB and / or its length measured along the axis AB, may be greater than the dimensions of the nozzle 3 . The density of the first body 1 may be greater than the density of the nozzle 3 . The first body 1 can be connected to at least one circuit 130 of fuel C via at least one opening 9 . The circuit 130 of fuel C comprises means 13 for treating the fuel C, comprising for ex...

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Abstract

The invention relates to an injector comprising: a nozzle comprising an opening and a base; a needle movably mounted in the nozzle and having an end which is in contact with the base A valve is defined in the area where the seat contacts; a mechanism for vibrating the valve; a first area of ​​acoustic impedance interruption, the first area is a first distance from the valve along the nozzle; another first area of ​​acoustic impedance interruption, the other The first region is a second distance from the valve along the needle. According to the invention, both the first and the second distance are designed such that the corresponding propagation time of the sound wave along said distance is: Ti=ni×[ζ / 2], where ni is a positive integer coefficient different from zero, and i=3 for the first distance, i=4 for the second distance, and ζ is the vibration period.

Description

technical field [0001] The invention relates to a device for injecting a fluid, such as fuel, in particular for an internal combustion engine. [0002] More specifically, the present invention in its first aspect relates to a fluid ejection device comprising: [0003] - a nozzle having a length along an axis and comprising a spray hole and a base, the nozzle being connected to the first body at opposite ends on said axis, [0004] - a needle having a length on said axis and a first end defining the valve element in the contact zone with the base, the needle being connected to the first end at the opposite end on the axis on the two body parts, the second body part is mounted to move axially in the first body part, [0005] - means for vibration, in order to vibrate the first end and / or the nozzle with a set period τ, thus ensuring a relative movement between them on said axis, suitable for alternately opening and closing the valve element, the nozzle and The first body and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/08F02M45/10
CPCF02M69/041F02M61/08F02M45/10F02M2200/21
Inventor A·阿涅雷N·马莱克M·帕里安泰L·勒万
Owner RENAULT SA
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