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Internal-combustion engine alternating spray hole type nozzle with perturbing zone

A disturbance zone, internal combustion engine technology, applied in engine components, machines/engines, fuel injection devices, etc., can solve problems such as reliability decline and increase in fuel pump power consumption, and achieve improved fuel atomization, fast combustion, and good economic performance. Effect

Active Publication Date: 2008-12-31
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. The current advanced diesel engine has already used an injection pressure above 200MPa, but further increasing the injection pressure will increase the power consumption of the oil pump and reduce the reliability.

Method used

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  • Internal-combustion engine alternating spray hole type nozzle with perturbing zone
  • Internal-combustion engine alternating spray hole type nozzle with perturbing zone
  • Internal-combustion engine alternating spray hole type nozzle with perturbing zone

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Embodiment Construction

[0014] figure 1 Shown is an internal combustion engine cross nozzle nozzle with a disturbance zone, which is composed of a needle valve body 1 and a needle valve 2, and a cross nozzle hole 3 with a disturbance zone is set at the head of the needle valve body 1. It is formed by crossing and converging two sub-nozzles 4 .

[0015] The intersecting nozzle hole 3 with a disturbance zone can have many different structural forms: the nozzle outlet shape factor of the nozzle hole 4 and the combination of the disturbance zone 5 are different, and there may be many different shapes. figure 2 Shown is a circular cross nozzle hole 3a in the form of an outlet, image 3 , 4 The outlet shape is shown as a non-circular intersecting orifice 3b.

[0016] The cross nozzle hole 3 with a disturbance zone, the disturbance zone 5 is formed by removing part of the entity in the intersection area of ​​the sub-spray holes, such as processing into a blind hole, and its structure can have various fo...

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Abstract

Disclosed is a cross jet-hole injection nozzle with a disturbance area of an internal combustion engine, which belongs to the oil injection device of the internal-combustion fuel-oil system. The cross jet-hole injection nozzle with the disturbance area of the internal combustion comprises a precise matching part composed of a needle valve body and a needle valve; at least a cross jet-hole injection hole with the disturbance area is arranged on the head part of the needle valve body. The turbulence flow of the internal fuel oil intensity of the injection nozzle, based on the turbulence flow disturbance generated on the cross position of the sub nozzle is further improved; thereby, the fuel-oil pulverization of the injection nozzle outlet is improved; the quality of the mixed gas is improved; the combustion is enabled to be more rapid, sufficient and complete; the engine is ensured to obtain better economy, exhaust and power performance under the same injection pressure.

Description

technical field [0001] The invention relates to an internal-combustion engine cross-spray hole type fuel injector with a disturbance area, 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. The curr...

Claims

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Application Information

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IPC IPC(8): F02M61/18
Inventor 隆武强冷先银田江平董全魏胜利齐鲲鹏冯立岩杜宝国
Owner DALIAN UNIV OF TECH
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