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Crossing spray orifice type injection nozzle of internal combustion engine

A technology of fuel injectors and internal combustion engines, applied in fuel injection devices, mechanical equipment, engine components, etc., to achieve the effects of improved emission performance and power performance, increased internal flow disturbance, and increased turbulence intensity

Inactive Publication Date: 2008-10-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the injection pressure is an important method to increase the turbulence intensity at the outlet of the nozzle hole to improve the atomization quality, especially some diesel engines have used an injection pressure above 200MPa, but further increasing the injection pressure is limited by factors such as material strength and power consumption

Method used

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  • Crossing spray orifice type injection nozzle of internal combustion engine
  • Crossing spray orifice type injection nozzle of internal combustion engine
  • Crossing spray orifice type injection nozzle of internal combustion engine

Examples

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Embodiment Construction

[0023] exist figure 1 In the example shown, the cross-spray nozzle is composed of a needle valve body 1 and a needle valve 2, and 4 to 6 cross-spray holes 3 are set on the head of the needle-valve body 1, and each cross-spray hole 3 is formed by crossing and converging 2 to 4 sub-nozzles 4 .

[0024] The cross nozzle hole 3 can have many different structural forms: the combination of the nozzle hole outlet shape factor nozzle hole 4 is different, and there may be many different shapes, such as Figure 2-12 as shown, Figure 2-10 A crossed orifice with a non-circular exit shape is shown in , Figure 11-12 Intersecting orifices with circular exit shapes are shown.

[0025] Figure 2-5 Four implementations of cross nozzle holes formed by the intersection of two sub nozzle holes are given, among which figure 2 The nozzle holes are equal in diameter, and the center lines are coplanar; image 3 Sub nozzle holes with different diameters, the center lines are coplanar; Figure...

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Abstract

The invention relates to a cross orifice typed injection nozzle for an internal-combustion engine and belongs to an oil injection device of a fuel system of the internal-combustion engine. The nozzle is a precision coupling formed by an injector valve body and an injector valve. The head of the injector valve body is provided with at least one cross sub-orifice and each cross orifice is formed by crossing and collecting of at least two sub-orifices. As the collection of fuel in the sub-orifices of the cross orifice can form intense disturbance, the turbulent kinetic energy is increased and the atomization is improved; as an outlet of the cross orifice is formed by the collection of the sub-orifices, the flow area of the outlet is less than the sum of the outlet areas of all the sub-orifices, the injection nozzle is characterized by improving discharge coefficient like an analogous V-shaped gradually shrinking orifice. In brief, the crossing of the sub-orifices increases the internal flow, improves the turbulent intensity, causes the cross orifice to improve atomization, improves the quality of the mixed gas and leads to rapid, sufficient and perfect combustion, thus being beneficial to the further improvement of the economic performance, discharging performance and kinetic performance of the motor.

Description

technical field [0001] The invention relates to an internal combustion engine cross-spray hole type fuel injection nozzle, which belongs to the fuel injection device of the internal combustion engine fuel system. Background technique [0002] It is well known that the performance of the fuel injection system of an internal combustion engine is the most critical factor affecting the quality of mixture formation, and thus also the dominant factor affecting the economy and emission of the internal combustion engine. Existing studies have shown that the fuel spray characteristics of internal combustion engines are affected by the cavitation and turbulence in the nozzle hole, and the greater the turbulence intensity near the outlet inside the nozzle hole, the better the spray atomization effect. Increasing the injection pressure is an important method to increase the turbulence intensity at the outlet of the nozzle hole to improve the atomization quality, especially some diesel e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18
Inventor 隆武强冷先银魏胜利董全齐鲲鹏冯立岩杜宝国崔亨冯文奇
Owner DALIAN UNIV OF TECH
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